/* roulang page: index */
:root{
  --ink:#14161A;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E5E1D8;
  --line-soft:#DCD8CE;
  --muted:#6B6F73;
  --signal:#E8552B;
  --signal-dark:#C8441F;
  --teal:#1F6F63;
  --radius-btn:8px;
  --radius-card:12px;
  --radius-lg:14px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04),0 12px 32px -16px rgba(20,22,26,.12);
  --shadow-hover:0 2px 4px rgba(20,22,26,.06),0 18px 40px -18px rgba(20,22,26,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --ff-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --ff-num:"Space Grotesk","DIN Alternate","Helvetica Neue",Arial,sans-serif;
  --section-gap:clamp(72px,9vw,132px);
}
*,
*::before,
*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--ff-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--signal);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.container.wide{max-width:1320px;}
.section{padding:var(--section-gap) 0;}
.section-tight{padding:clamp(48px,6vw,84px) 0;}
.num{font-family:var(--ff-num);font-weight:500;letter-spacing:.01em;}
.eyebrow{
  display:inline-block;
  font-family:var(--ff-num);
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--teal);
  margin-bottom:14px;
}
.section-head{max-width:760px;margin-bottom:clamp(28px,3.4vw,40px);}
.section-head h2{
  font-size:clamp(28px,3.4vw,44px);
  line-height:1.2;
  font-weight:700;
  letter-spacing:-.015em;
}
.section-head p{
  margin-top:14px;
  color:var(--muted);
  font-size:16px;
  line-height:1.85;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-weight:600;
  font-size:15px;
  cursor:pointer;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.btn-primary{background:var(--signal);color:#fff;}
.btn-primary:hover{background:var(--signal-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -12px rgba(232,85,43,.7);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px);}
.btn-light{background:var(--paper);color:var(--ink);border-color:transparent;}
.btn-light:hover{background:#fff;color:var(--ink);transform:translateY(-1px);}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-weight:600;
  font-size:15px;
  color:var(--ink);
  border-bottom:1px solid rgba(232,85,43,.45);
  padding-bottom:2px;
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.link-arrow span{transition:transform .2s var(--ease);}
.link-arrow:hover{color:var(--signal);border-color:var(--signal);}
.link-arrow:hover span{transform:translateX(3px);}
.tag{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  letter-spacing:.04em;
  background:rgba(31,111,99,.1);
  color:var(--teal);
  border:1px solid rgba(31,111,99,.18);
}
.tag-signal{background:rgba(232,85,43,.1);color:var(--signal-dark);border-color:rgba(232,85,43,.22);}

/* ---------- header ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:rgba(246,244,239,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),background-color .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 8px 24px -18px rgba(20,22,26,.45);background:rgba(246,244,239,.99);}
.nav-wrap{display:flex;align-items:center;gap:24px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{
  width:34px;height:34px;border-radius:8px;background:var(--ink);color:var(--paper);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--ff-num);font-weight:600;font-size:14px;letter-spacing:.02em;
}
.brand-text{font-size:16.5px;font-weight:700;letter-spacing:-.01em;display:flex;align-items:center;gap:8px;}
.brand-badge{
  display:inline-flex;align-items:center;height:20px;padding:0 7px;border-radius:999px;
  background:var(--signal);color:#fff;font-size:11px;font-weight:600;letter-spacing:.08em;
  line-height:1;
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px;}
.main-nav a{
  position:relative;
  padding:8px 15px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  border-radius:6px;
  transition:color .18s var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:15px;right:15px;bottom:2px;
  height:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--signal-dark);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--ink);font-weight:600;}
.main-nav a.active::after{transform:scaleX(1);}
.nav-right{display:flex;align-items:center;gap:12px;margin-left:auto;}
.cmd-search{
  display:flex;align-items:center;gap:8px;
  height:36px;padding:0 10px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-btn);
  min-width:230px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.cmd-search:focus-within{border-color:var(--signal);box-shadow:0 0 0 2px rgba(232,85,43,.18);}
.cmd-search i{font-size:12px;color:var(--muted);}
.cmd-search input{
  border:0;background:transparent;outline:none;width:100%;
  font-size:14px;line-height:1;color:var(--ink);
}
.cmd-search input::placeholder{color:#9A9D9F;}
.kbd{
  font-family:var(--ff-num);font-size:11px;font-weight:500;
  padding:2px 6px;border-radius:5px;background:var(--paper);
  border:1px solid var(--line);color:var(--muted);line-height:1.4;white-space:nowrap;
}
.icon-btn{
  width:36px;height:36px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:var(--surface);
  display:flex;align-items:center;justify-content:center;color:var(--ink);
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:38px;height:38px;border-radius:var(--radius-btn);
  border:1px solid var(--line);background:var(--surface);
  align-items:center;justify-content:center;cursor:pointer;
}

/* ---------- hero ---------- */
.hero{
  position:relative;
  overflow:hidden;
  border-bottom:1px solid var(--line);
  background-image:linear-gradient(115deg,rgba(20,22,26,.94) 0%,rgba(20,22,26,.86) 46%,rgba(20,22,26,.72) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  color:var(--paper);
}
.hero-inner{padding:clamp(56px,7vw,104px) 0 clamp(52px,6vw,88px);}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:clamp(28px,4vw,56px);align-items:center;}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 12px;border-radius:999px;
  border:1px solid rgba(246,244,239,.24);
  background:rgba(246,244,239,.08);
  font-size:12.5px;font-weight:600;letter-spacing:.06em;color:#F6F4EF;
}
.hero-badge .dot{width:7px;height:7px;border-radius:50%;background:var(--signal);}
.hero h1{
  margin-top:22px;
  font-size:clamp(36px,5.2vw,68px);
  line-height:1.08;
  font-weight:700;
  letter-spacing:-.02em;
}
.hero h1 em{font-style:normal;color:var(--signal);}
.hero-sub{
  margin-top:22px;
  max-width:560px;
  color:#C9CCC7;
  font-size:16.5px;
  line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(4,1fr);
  gap:0;margin-top:44px;
  border-top:1px solid rgba(246,244,239,.14);
  padding-top:24px;
}
.hero-stat{padding-right:14px;}
.hero-stat + .hero-stat{border-left:1px solid rgba(246,244,239,.14);padding-left:18px;}
.hero-stat .v{font-family:var(--ff-num);font-size:clamp(24px,2.6vw,32px);font-weight:600;color:#F6F4EF;line-height:1.2;}
.hero-stat .l{font-size:12.5px;color:#A9ADA8;margin-top:4px;letter-spacing:.04em;}
.hero-visual{position:relative;}
.hero-visual .shot{
  border-radius:var(--radius-lg);
  overflow:hidden;
  border:1px solid rgba(246,244,239,.16);
  box-shadow:0 24px 60px -28px rgba(0,0,0,.8);
  aspect-ratio:16/11;
}
.hero-visual .shot img{width:100%;height:100%;object-fit:cover;}
.hero-float{
  position:absolute;
  left:-22px;bottom:-26px;
  width:min(270px,86%);
  background:var(--surface);
  border-radius:var(--radius-card);
  border:1px solid var(--line);
  box-shadow:var(--shadow-hover);
  padding:16px 18px;
  color:var(--ink);
}
.hero-float .t{font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--teal);}
.hero-float .n{font-family:var(--ff-num);font-size:26px;font-weight:600;line-height:1.2;margin-top:6px;}
.hero-float .d{font-size:13px;color:var(--muted);margin-top:2px;}

/* ---------- trust bar ---------- */
.trustbar{border-bottom:1px solid var(--line);background:var(--surface);}
.trustbar-grid{display:grid;grid-template-columns:repeat(4,1fr);}
.trustbar-item{
  padding:22px 24px;
  border-left:1px solid var(--line);
  display:flex;flex-direction:column;gap:4px;
}
.trustbar-item:first-child{border-left:0;}
.trustbar-item .k{font-size:14.5px;font-weight:600;}
.trustbar-item .v{font-size:13.5px;color:var(--muted);}

/* ---------- compare table ---------- */
.table-wrap{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.table-scroll{overflow-x:auto;}
table.compare{width:100%;border-collapse:collapse;min-width:720px;}
table.compare th,
table.compare td{
  padding:16px 22px;
  text-align:left;
  border-bottom:1px solid var(--line);
  font-size:15px;
  vertical-align:middle;
}
table.compare thead th{
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--muted);
  background:#FBFAF6;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
table.compare thead th.col-reco{
  position:relative;
  background:#FDF1EC;
  color:var(--signal-dark);
  border-top:3px solid var(--signal);
  padding-top:13px;
}
table.compare tbody tr:hover{background:#FBFAF6;}
table.compare tbody tr:last-child td{border-bottom:0;}
table.compare td:first-child,
table.compare th:first-child{
  position:sticky;left:0;z-index:2;
  background:var(--surface);
  font-weight:600;
  min-width:190px;
  border-right:1px solid var(--line);
}
table.compare thead th:first-child{background:#FBFAF6;z-index:3;}
table.compare thead th.col-reco:first-child{background:#FDF1EC;}
table.compare tbody tr:hover td:first-child{background:#FBFAF6;}
table.compare td.col-reco{background:#FDF1EC;}
table.compare tbody tr:hover td.col-reco{background:#FBEBE4;}
table.compare tbody tr:hover td.col-reco:first-child{background:#FBEBE4;}
.yes{color:var(--ink);font-weight:600;}
.no{color:#B4B7B3;font-weight:500;}
.reco-badge{
  display:inline-flex;align-items:center;height:20px;padding:0 8px;margin-left:8px;
  border-radius:999px;background:var(--signal);color:#fff;
  font-size:11px;font-weight:600;letter-spacing:.06em;
  vertical-align:middle;
}

/* ---------- levels ---------- */
.levels-grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,4vw,60px);align-items:start;}
.levels-note h2{font-size:clamp(28px,3.4vw,42px);line-height:1.2;font-weight:700;letter-spacing:-.015em;}
.levels-note p{margin-top:16px;color:var(--muted);}
.levels-note .link-arrow{margin-top:24px;}
.level-cards{display:grid;gap:18px;}
.level-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:26px 28px;
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.level-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-hover);}
.level-card:nth-child(1){margin-right:clamp(0px,4vw,52px);}
.level-card:nth-child(2){margin-left:clamp(0px,4vw,52px);}
.level-card:nth-child(3){margin-right:clamp(0px,2vw,26px);}
.level-top{display:flex;align-items:baseline;gap:14px;padding-bottom:14px;border-bottom:1px solid var(--line-soft);}
.level-no{font-family:var(--ff-num);font-size:30px;font-weight:600;color:var(--teal);line-height:1;}
.level-name{font-size:20px;font-weight:700;}
.level-desc{margin-top:14px;font-size:15px;color:var(--muted);line-height:1.8;}
.level-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}

/* ---------- mosaic ---------- */
.mosaic{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:auto auto;gap:20px;}
.mosaic-card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.mosaic-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-hover);}
.mosaic-card.big{grid-column:span 2;grid-row:span 2;}
.mosaic-thumb{overflow:hidden;aspect-ratio:16/10;background:#EDEAE3;}
.mosaic-card.big .mosaic-thumb{aspect-ratio:16/9;}
.mosaic-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.mosaic-card:hover .mosaic-thumb img{transform:scale(1.03);}
.mosaic-body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.mosaic-body h3{font-size:19px;font-weight:700;line-height:1.4;}
.mosaic-card.big .mosaic-body h3{font-size:24px;}
.mosaic-body p{font-size:14.5px;color:var(--muted);line-height:1.8;}
.mosaic-body .link-arrow{margin-top:auto;font-size:14px;}

/* ---------- cms list ---------- */
.cms-list{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
  overflow:hidden;
}
.cms-item{
  display:grid;
  grid-template-columns:170px 1fr;
  gap:24px;
  padding:24px 28px;
  border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease);
}
.cms-item:last-child{border-bottom:0;}
.cms-item:hover{background:#FBFAF6;}
.cms-meta{display:flex;flex-direction:column;gap:8px;align-items:flex-start;}
.cms-date{font-family:var(--ff-num);font-size:14px;font-weight:500;color:var(--muted);letter-spacing:.02em;}
.cms-body h3{font-size:18px;font-weight:700;line-height:1.5;}
.cms-body h3 a{transition:color .18s var(--ease);}
.cms-body h3 a:hover{color:var(--signal);}
.cms-body p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.8;}
.cms-body .link-arrow{margin-top:12px;font-size:14px;}
.cms-empty{padding:44px 28px;text-align:center;}
.cms-empty p{color:var(--muted);font-size:15px;}
.cms-empty .link-arrow{margin-top:14px;}

/* ---------- faq + cta ---------- */
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,4vw,64px);align-items:start;}
.faq-left h2{font-size:clamp(28px,3.4vw,42px);line-height:1.2;font-weight:700;letter-spacing:-.015em;}
.faq-left p{margin-top:16px;color:var(--muted);}
.faq-left .btn{margin-top:26px;}
.accordion-item{
  background:transparent;
  border:0;
  border-bottom:1px solid var(--line);
  border-radius:0;
}
.accordion-item:first-of-type{border-top:1px solid var(--line);}
.accordion-button{
  background:transparent;
  color:var(--ink);
  font-size:17px;
  font-weight:600;
  padding:20px 44px 20px 0;
  border-radius:0;
  box-shadow:none!important;
  line-height:1.6;
  transition:color .2s var(--ease);
}
.accordion-button:not(.collapsed){color:var(--signal);background:transparent;}
.accordion-button::after{
  content:"\2b";
  font-family:var(--ff-num);
  font-size:20px;
  font-weight:400;
  line-height:1;
  display:flex;
  align-items:center;
  justify-content:center;
  width:24px;height:24px;
  background-image:none!important;
  color:var(--muted);
  transform:none;
  transition:transform .22s var(--ease),color .22s var(--ease);
  position:absolute;
  right:0;
}
.accordion-button:not(.collapsed)::after{transform:rotate(45deg);color:var(--signal);}
.accordion-body{
  padding:0 0 22px;
  color:var(--muted);
  font-size:15.5px;
  line-height:1.85;
  max-width:68ch;
}

.cta-block{
  background:var(--ink);
  color:var(--paper);
  border-radius:var(--radius-lg);
  padding:clamp(34px,4.6vw,60px);
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:clamp(28px,4vw,56px);
  align-items:center;
}
.cta-block h2{font-size:clamp(26px,3vw,38px);line-height:1.22;font-weight:700;letter-spacing:-.015em;}
.cta-points{margin-top:22px;display:grid;gap:10px;}
.cta-points li{display:flex;gap:10px;font-size:15px;color:#C9CCC7;}
.cta-points li i{color:var(--signal);margin-top:5px;font-size:13px;}
.cta-panel{
  background:rgba(246,244,239,.05);
  border:1px solid rgba(246,244,239,.14);
  border-radius:var(--radius-card);
  padding:24px;
}
.cta-panel .label{font-size:12.5px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:#A9ADA8;}
.period-opts{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px;}
.period-opt{
  border:1px solid rgba(246,244,239,.18);
  border-radius:var(--radius-btn);
  background:transparent;
  color:#E6E4DE;
  padding:10px 6px;
  font-size:13.5px;
  font-weight:600;
  cursor:pointer;
  transition:border-color .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease);
}
.period-opt:hover{border-color:rgba(232,85,43,.6);color:#fff;}
.period-opt.is-active{background:var(--signal);border-color:var(--signal);color:#fff;}
.cta-panel .btn{width:100%;margin-top:16px;}
.cta-note{margin-top:12px;font-size:12.5px;color:#A9ADA8;line-height:1.7;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--paper);padding:clamp(52px,6vw,84px) 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:clamp(24px,3.4vw,48px);}
.footer-brand .brand-mark{background:var(--paper);color:var(--ink);}
.footer-brand .brand-text{color:var(--paper);}
.footer-brand p{margin-top:18px;font-size:14px;color:#A9ADA8;line-height:1.85;max-width:36ch;}
.footer-col h3{
  font-size:12.5px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;
  color:#8E928D;margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col a,.footer-col li{font-size:14.5px;color:#D6D4CE;transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--signal);}
.footer-bottom{
  margin-top:clamp(36px,4.4vw,56px);
  border-top:1px solid rgba(246,244,239,.12);
  padding:22px 0 28px;
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:#8E928D;
}
.footer-bottom a{color:#A9ADA8;}
.footer-bottom a:hover{color:var(--signal);}

/* ---------- mobile drawer ---------- */
.drawer-mask{
  position:fixed;inset:0;background:rgba(20,22,26,.5);
  opacity:0;pointer-events:none;transition:opacity .22s var(--ease);z-index:1090;
}
.drawer-mask.open{opacity:1;pointer-events:auto;}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(380px,90vw);
  background:var(--paper);z-index:1100;
  transform:translateX(100%);
  transition:transform .32s var(--ease);
  display:flex;flex-direction:column;
  border-left:1px solid var(--line);
}
.drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:18px 20px;border-bottom:1px solid var(--line);}
.drawer-close{
  width:36px;height:36px;border-radius:var(--radius-btn);border:1px solid var(--line);
  background:var(--surface);display:flex;align-items:center;justify-content:center;cursor:pointer;
}
.drawer-body{padding:20px;overflow-y:auto;flex:1;}
.drawer-body .cmd-search{min-width:0;width:100%;}
.drawer-nav{margin-top:20px;display:grid;gap:2px;}
.drawer-nav a{
  display:block;padding:14px 4px;font-size:19px;font-weight:600;
  border-bottom:1px solid var(--line);
}
.drawer-nav a.active{color:var(--signal);}
.drawer-foot{padding:18px 20px;border-top:1px solid var(--line);}
.drawer-foot .btn{width:100%;}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.reveal.in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1199.98px){
  .cmd-search{min-width:180px;}
  .main-nav a{padding:8px 11px;font-size:14.5px;}
}
@media (max-width:991.98px){
  .main-nav,.nav-right .cmd-search,.nav-right .icon-btn,.nav-right .btn-primary{display:none;}
  .nav-toggle{display:flex;}
  .nav-right{margin-left:auto;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-float{position:static;width:100%;margin-top:16px;left:auto;bottom:auto;}
  .trustbar-grid{grid-template-columns:repeat(2,1fr);}
  .trustbar-item:nth-child(3){border-left:0;}
  .trustbar-item:nth-child(n+3){border-top:1px solid var(--line);}
  .levels-grid{grid-template-columns:1fr;}
  .level-card:nth-child(1),
  .level-card:nth-child(2),
  .level-card:nth-child(3){margin-left:0;margin-right:0;}
  .faq-grid{grid-template-columns:1fr;}
  .mosaic{grid-template-columns:1fr 1fr;}
  .mosaic-card.big{grid-column:span 2;grid-row:auto;}
  .cta-block{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .cms-item{grid-template-columns:130px 1fr;gap:18px;padding:20px 22px;}
}
@media (max-width:575.98px){
  body{font-size:16px;}
  .container{padding:0 16px;}
  .hero-stats{grid-template-columns:1fr 1fr;gap:0;}
  .hero-stat{padding:14px 0;}
  .hero-stat + .hero-stat{border-left:0;padding-left:0;}
  .hero-stat:nth-child(even){border-left:1px solid rgba(246,244,239,.14);padding-left:18px;}
  .hero-stat:nth-child(n+3){border-top:1px solid rgba(246,244,239,.14);}
  .hero-actions .btn{flex:1 1 100%;}
  .trustbar-grid{grid-template-columns:1fr;}
  .trustbar-item{border-left:0;border-top:1px solid var(--line);}
  .trustbar-item:first-child{border-top:0;}
  .mosaic{grid-template-columns:1fr;}
  .mosaic-card.big{grid-column:span 1;}
  .cms-item{grid-template-columns:1fr;gap:10px;}
  .cms-meta{flex-direction:row;align-items:center;gap:10px;}
  .cta-panel{padding:18px;}
  .period-opts{grid-template-columns:1fr 1fr 1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  html{scroll-behavior:auto;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
:root{
  --ink:#14161A;
  --ink-soft:#A9ADA8;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E5E1D8;
  --line-soft:#DCD8CE;
  --muted:#6B6F73;
  --signal:#E8552B;
  --signal-dark:#C8441F;
  --signal-tint:#FDF1EC;
  --teal:#1F6F63;
  --radius-btn:8px;
  --radius-card:12px;
  --radius-lg:14px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04), 0 12px 32px -16px rgba(20,22,26,.12);
  --shadow-hover:0 1px 2px rgba(20,22,26,.05), 0 20px 44px -18px rgba(20,22,26,.2);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-mono:"Space Grotesk","DIN Alternate","Helvetica Neue",Arial,sans-serif;
  --section-gap:clamp(72px,9vw,132px);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .14s var(--ease);}
a:hover{color:var(--signal);}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3{margin:0;font-weight:700;letter-spacing:-.015em;color:var(--ink);}
h1{font-size:clamp(34px,4.6vw,58px);line-height:1.1;letter-spacing:-.02em;}
h2{font-size:clamp(26px,3.2vw,40px);line-height:1.22;}
h3{font-size:21px;line-height:1.4;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 24px;
}
.container-wide{max-width:1320px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 22px;
  border-radius:var(--radius-btn);
  border:1px solid transparent;
  font-size:15px;
  font-weight:600;
  letter-spacing:.01em;
  line-height:1;
  cursor:pointer;
  transition:transform .14s var(--ease),background-color .16s var(--ease),color .16s var(--ease),border-color .16s var(--ease),box-shadow .2s var(--ease);
}
.btn:focus,.btn:active{box-shadow:none;}
.btn-primary{background:var(--signal);color:#fff;border-color:var(--signal);}
.btn-primary:hover{background:var(--signal-dark);border-color:var(--signal-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 24px -14px rgba(200,68,31,.85);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper);transform:translateY(-1px);}
.btn-dark{background:var(--ink);border-color:var(--ink);color:var(--paper);}
.btn-dark:hover{background:#000;border-color:#000;color:var(--paper);transform:translateY(-1px);}
.btn-text{background:none;border:none;padding:0;height:auto;color:var(--ink);font-weight:600;font-size:15px;}
.btn-text .arrow{display:inline-block;transition:transform .16s var(--ease);}
.btn-text:hover .arrow{transform:translateX(3px);}
.btn-sm{height:40px;padding:0 16px;font-size:14px;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1030;
  background:rgba(246,244,239,.97);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 26px -20px rgba(20,22,26,.55);}
.nav-inner{display:flex;align-items:center;gap:20px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;color:var(--ink);}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:34px;height:34px;border-radius:8px;background:var(--ink);color:var(--paper);
  display:grid;place-items:center;font-family:var(--font-mono);font-size:13px;font-weight:700;letter-spacing:.04em;
}
.brand-text{display:flex;align-items:center;gap:7px;font-size:16px;font-weight:700;letter-spacing:-.01em;}
.brand-badge{
  font-size:10px;font-weight:600;letter-spacing:.1em;padding:2px 7px;border-radius:999px;
  border:1px solid var(--line-soft);background:var(--surface);color:var(--muted);
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px;}
.main-nav a{
  position:relative;
  padding:8px 17px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  border-radius:6px;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:17px;right:17px;bottom:2px;
  height:2px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .22s var(--ease);
}
.main-nav a:hover::after,.main-nav a:focus-visible::after{transform:scaleX(1);}
.main-nav a.active{font-weight:600;}
.main-nav a.active::after{transform:scaleX(1);}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:8px;
  height:36px;min-width:236px;padding:0 10px;
  background:#FBFAF6;border:1px solid var(--line-soft);border-radius:8px;
  transition:border-color .16s var(--ease),box-shadow .16s var(--ease);
}
.command-search svg{width:15px;height:15px;flex-shrink:0;color:var(--muted);}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);font-family:var(--font-sans);
}
.command-search input::placeholder{color:#9A9D98;}
.command-search:focus-within{border-color:var(--signal);box-shadow:0 0 0 2px rgba(232,85,43,.18);}
.command-search .kbd{
  font-family:var(--font-mono);font-size:11px;color:var(--muted);
  border:1px solid var(--line-soft);border-radius:4px;padding:1px 5px;flex-shrink:0;
}
.icon-btn{
  width:38px;height:38px;display:grid;place-items:center;border-radius:8px;
  border:1px solid var(--line-soft);background:var(--surface);color:var(--ink);
  transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease);
}
.icon-btn svg{width:17px;height:17px;}
.icon-btn:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px);}
.nav-cta{height:40px;padding:0 18px;font-size:14px;}
.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line-soft);background:var(--surface);
  border-radius:8px;padding:0;place-items:center;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);margin:3px auto;transition:transform .2s var(--ease),opacity .2s var(--ease);}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:68px 0 0;z-index:1025;
  background:var(--paper);
  padding:24px;
  display:flex;flex-direction:column;gap:18px;
  overflow-y:auto;
}
.mobile-drawer[hidden]{display:none;}
.mobile-drawer .command-search{min-width:0;width:100%;height:44px;}
.mobile-drawer nav{display:flex;flex-direction:column;}
.mobile-drawer nav a{
  padding:16px 2px;font-size:19px;font-weight:600;border-bottom:1px solid var(--line);
}
.mobile-drawer nav a.active{color:var(--signal);}
.mobile-drawer .drawer-cta{margin-top:auto;padding-top:18px;}
.mobile-drawer .drawer-cta .btn{width:100%;}

/* ---------- hero ---------- */
.cat-hero{padding:clamp(44px,6vw,88px) 0 clamp(32px,4vw,56px);}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:clamp(28px,4vw,56px);align-items:center;}
.eyebrow{
  display:inline-block;margin-bottom:18px;
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.14em;
  color:var(--teal);text-transform:uppercase;
}
.eyebrow::before{
  content:"";display:inline-block;width:22px;height:1px;background:var(--teal);
  vertical-align:middle;margin-right:10px;
}
.cat-hero h1{margin-bottom:20px;}
.lede{font-size:17px;line-height:1.85;color:var(--muted);max-width:56ch;margin-bottom:26px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px;}
.hero-facts{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid var(--line);
}
.hero-facts li{padding:18px 14px 0 0;border-right:1px solid var(--line);}
.hero-facts li:last-child{border-right:0;}
.fact-num{display:block;font-family:var(--font-mono);font-size:28px;font-weight:500;line-height:1.2;color:var(--ink);}
.fact-label{display:block;font-size:12px;letter-spacing:.06em;color:var(--muted);margin-top:4px;}

.hero-media{position:relative;}
.media-frame{
  margin:0;border-radius:var(--radius-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);box-shadow:var(--shadow-card);
}
.media-frame img{width:100%;aspect-ratio:16/11;object-fit:cover;}
.media-float{
  position:absolute;left:-14px;bottom:-22px;width:min(248px,80%);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:16px 18px;box-shadow:var(--shadow-card);
}
.float-label{display:block;font-size:11px;font-weight:600;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;}
.media-float strong{display:block;font-size:16px;margin:4px 0 2px;}
.float-note{font-size:12.5px;color:var(--muted);}

/* ---------- section basics ---------- */
.section{padding:var(--section-gap) 0;}
.section-head{max-width:720px;margin-bottom:clamp(28px,3.4vw,44px);}
.section-head h2{margin-bottom:14px;}
.section-head p{color:var(--muted);margin:0;}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}

/* ---------- split feature block ---------- */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,4vw,64px);align-items:start;}
.feature-list{border-bottom:1px solid var(--line);}
.feature-item{
  display:grid;grid-template-columns:58px 1fr;gap:18px;
  padding:24px 6px 24px 0;border-top:1px solid var(--line);
  transition:background-color .18s var(--ease);
}
.feature-item:hover{background:#FBFAF6;}
.feature-num{
  font-family:var(--font-mono);font-size:19px;font-weight:500;color:var(--teal);line-height:1.5;
}
.feature-item h3{margin-bottom:6px;font-size:19px;}
.feature-item p{margin:0;font-size:15.5px;line-height:1.8;color:var(--muted);}
.sticky-media{position:sticky;top:96px;}
.sticky-media .media-frame img{aspect-ratio:4/3;}
.media-caption{font-size:13px;color:var(--muted);margin:12px 2px 0;}

.check-list{margin-top:22px;display:grid;gap:12px;}
.check-list li{position:relative;padding-left:26px;font-size:15.5px;color:var(--ink);}
.check-list li::before{
  content:"";position:absolute;left:0;top:9px;width:11px;height:6px;
  border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);
  transform:rotate(-45deg);
}

/* ---------- spec table ---------- */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-lg);
  background:var(--surface);box-shadow:var(--shadow-card);-webkit-overflow-scrolling:touch;
}
table.spec{width:100%;min-width:640px;border-collapse:collapse;font-size:15px;}
table.spec caption{
  text-align:left;padding:18px 24px;font-size:13px;letter-spacing:.06em;color:var(--muted);
  border-bottom:1px solid var(--line);
}
table.spec th,table.spec td{padding:15px 20px;text-align:left;border-bottom:1px solid var(--line);vertical-align:middle;}
table.spec thead th{
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--muted);text-transform:uppercase;background:#FBFAF6;
  position:relative;
}
table.spec thead th.recommend{
  background:var(--signal-tint);color:var(--signal-dark);
  box-shadow:inset 0 3px 0 var(--signal);
}
table.spec thead th.recommend .rec-badge{
  display:inline-block;margin-left:8px;font-size:10px;font-weight:600;letter-spacing:.06em;
  padding:1px 7px;border-radius:999px;background:var(--signal);color:#fff;
}
table.spec tbody tr:hover{background:#FBFAF6;}
table.spec tbody tr:last-child td{border-bottom:0;}
table.spec td:first-child,table.spec th:first-child{font-weight:600;color:var(--ink);}
table.spec td{color:var(--muted);}
table.spec td.recommend{background:rgba(253,241,236,.55);color:var(--ink);}
.tick{display:inline-block;width:12px;height:7px;border-left:2px solid var(--ink);border-bottom:2px solid var(--ink);transform:rotate(-45deg);vertical-align:1px;}
.dash{color:#B9BCB6;}

/* ---------- dark block ---------- */
.dark-block{
  background:var(--ink);color:var(--paper);
  border-radius:var(--radius-lg);
  padding:clamp(28px,4.4vw,56px);
  display:grid;grid-template-columns:.9fr 1.1fr;gap:clamp(24px,4vw,52px);
}
.dark-block h2{color:var(--paper);margin-bottom:14px;}
.dark-block p{color:var(--ink-soft);margin:0;}
.dark-list{display:grid;gap:22px;}
.dark-list li{
  padding-bottom:20px;border-bottom:1px solid rgba(246,244,239,.12);
}
.dark-list li:last-child{border-bottom:0;padding-bottom:0;}
.dark-list h3{color:var(--paper);font-size:17.5px;margin-bottom:6px;}
.dark-list p{font-size:15px;line-height:1.8;color:var(--ink-soft);}
.dark-tag{
  display:inline-block;margin-bottom:16px;padding:3px 10px;border-radius:999px;
  border:1px solid rgba(246,244,239,.22);font-family:var(--font-mono);
  font-size:11px;letter-spacing:.14em;color:var(--ink-soft);
}

/* ---------- figure cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:26px 24px;box-shadow:var(--shadow-card);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .22s var(--ease);
}
.info-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-hover);}
.info-card h3{font-size:18px;margin-bottom:8px;}
.info-card p{font-size:15px;color:var(--muted);margin:0;}
.card-index{
  font-family:var(--font-mono);font-size:12px;letter-spacing:.14em;color:var(--teal);
  display:block;margin-bottom:14px;
}

/* ---------- cross links ---------- */
.cross-section{padding:clamp(48px,6vw,88px) 0;border-top:1px solid var(--line);}
.cross-section h2{font-size:clamp(22px,2.4vw,28px);margin-bottom:20px;}
.cross-links{display:flex;flex-wrap:wrap;gap:10px;}
.cross-tag{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 18px;
  border:1px solid var(--line-soft);border-radius:999px;background:var(--surface);
  font-size:14.5px;font-weight:500;color:var(--ink);
  transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease),background-color .16s var(--ease);
}
.cross-tag::after{content:"→";font-family:var(--font-mono);font-size:13px;color:var(--muted);transition:transform .16s var(--ease);}
.cross-tag:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px);background:#FFFCFA;}
.cross-tag:hover::after{transform:translateX(2px);color:var(--signal);}

/* ---------- CTA ---------- */
.cta-strip{padding:0 0 var(--section-gap);}
.cta-inner{
  background:var(--signal-tint);
  border:1px solid #F3DCD2;
  border-radius:var(--radius-lg);
  padding:clamp(28px,4vw,48px);
  display:grid;grid-template-columns:1.2fr .8fr;gap:clamp(22px,3.6vw,44px);
  align-items:center;
}
.cta-inner h2{font-size:clamp(24px,2.8vw,32px);margin-bottom:12px;}
.cta-inner p{color:#6A5449;margin:0;max-width:52ch;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:flex-end;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:var(--paper);padding:clamp(48px,6vw,80px) 0 28px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.55fr 1fr 1fr 1.35fr;gap:clamp(24px,3.4vw,48px);}
.site-footer .brand{color:var(--paper);margin-bottom:16px;}
.site-footer .brand:hover{color:var(--paper);}
.site-footer .brand-mark{background:var(--paper);color:var(--ink);}
.site-footer .brand-badge{background:transparent;border-color:rgba(246,244,239,.24);color:var(--ink-soft);}
.footer-brand p{color:var(--ink-soft);font-size:14.5px;line-height:1.8;max-width:36ch;margin:0;}
.footer-col h3{
  font-family:var(--font-mono);font-size:12px;font-weight:600;letter-spacing:.12em;
  text-transform:uppercase;color:var(--ink-soft);margin-bottom:16px;
}
.footer-col ul{display:grid;gap:10px;}
.footer-col li{font-size:14.5px;color:var(--ink-soft);line-height:1.7;}
.footer-col a{color:var(--paper);}
.footer-col a:hover{color:var(--signal);}
.footer-bottom{
  margin-top:clamp(28px,4vw,48px);padding-top:22px;
  border-top:1px solid rgba(246,244,239,.12);
  display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
  font-size:13px;color:#8E928C;
}

/* ---------- reveal ---------- */
[data-reveal]{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease);}
[data-reveal].is-in{opacity:1;transform:none;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .command-search{min-width:200px;}
  .main-nav a{padding:8px 12px;}
  .main-nav a::after{left:12px;right:12px;}
}
@media (max-width:991px){
  .main-nav,.command-search,.icon-btn,.nav-cta{display:none;}
  .nav-toggle{display:grid;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-media{margin-top:18px;}
  .media-float{left:auto;right:14px;bottom:-18px;}
  .split{grid-template-columns:1fr;}
  .sticky-media{position:static;order:-1;}
  .dark-block{grid-template-columns:1fr;}
  .cta-inner{grid-template-columns:1fr;}
  .cta-actions{justify-content:flex-start;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .hero-facts{grid-template-columns:repeat(2,1fr);}
  .hero-facts li{padding:16px 12px 0 0;}
  .hero-facts li:nth-child(2){border-right:0;}
  .feature-item{grid-template-columns:44px 1fr;gap:12px;padding:20px 0;}
  .card-grid{grid-template-columns:1fr;}
  .hero-actions .btn{flex:1 1 100%;}
  .media-float{position:static;width:100%;margin-top:14px;left:auto;right:auto;bottom:auto;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;}
}
@media (max-width:575px){
  .container{padding:0 18px;}
  .brand-text{font-size:15px;}
  .table-wrap{border-radius:10px;}
  table.spec th:first-child,table.spec td:first-child{
    position:sticky;left:0;background:var(--surface);z-index:2;
    box-shadow:1px 0 0 var(--line);
  }
  table.spec thead th:first-child{background:#FBFAF6;z-index:3;}
  .cross-tag{height:38px;padding:0 14px;font-size:13.5px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
  [data-reveal]{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: article */
:root{
  --ink:#14161A;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E5E1D8;
  --line-soft:#DCD8CE;
  --muted:#6B6F73;
  --signal:#E8552B;
  --signal-dark:#C8441F;
  --signal-soft:#FDF1EC;
  --teal:#1F6F63;
  --radius-btn:8px;
  --radius-card:12px;
  --radius-lg:14px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04), 0 12px 32px -16px rgba(20,22,26,.12);
  --shadow-hover:0 2px 4px rgba(20,22,26,.05), 0 18px 40px -18px rgba(20,22,26,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Space Grotesk","DIN Alternate","Helvetica Neue",Arial,sans-serif;
  --section-gap:clamp(64px,7vw,108px);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;}
ul,ol{padding-left:1.15em;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;border-radius:4px;}
::selection{background:rgba(232,85,43,.18);}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.container-wide{max-width:1320px;}
.num{font-family:var(--font-num);font-weight:500;letter-spacing:.01em;}
.eyebrow{
  display:inline-block;
  font-family:var(--font-num);
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),background .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 10px 30px -22px rgba(20,22,26,.55);}
.header-inner{display:flex;align-items:center;gap:20px;height:68px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:32px;height:32px;border-radius:8px;background:var(--ink);color:var(--paper);
  display:grid;place-items:center;font-family:var(--font-num);font-size:13.5px;font-weight:600;letter-spacing:.02em;
}
.brand-text{display:flex;align-items:center;gap:6px;font-size:16px;font-weight:700;letter-spacing:-.01em;}
.brand-badge{
  font-size:10px;font-weight:600;letter-spacing:.12em;color:var(--muted);
  border:1px solid var(--line-soft);border-radius:999px;padding:2px 7px;line-height:1.4;
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px;}
.main-nav a{
  position:relative;display:inline-block;padding:10px 16px;font-size:15px;font-weight:500;color:var(--ink);border-radius:6px;
}
.main-nav a::after{
  content:"";position:absolute;left:16px;right:16px;bottom:6px;height:1px;background:var(--signal);
  transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1);}
.main-nav a.active{font-weight:600;}
.header-tools{display:flex;align-items:center;gap:10px;margin-left:auto;}
.command-search{
  display:flex;align-items:center;gap:8px;height:36px;min-width:216px;padding:0 10px;
  background:var(--surface);border:1px solid var(--line);border-radius:8px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search svg{flex:0 0 auto;color:var(--muted);}
.command-search input{
  border:0;outline:0;background:transparent;width:100%;
  font-family:var(--font-cn);font-size:13.5px;color:var(--ink);line-height:1;
}
.command-search input::placeholder{color:#9AA0A3;}
.command-search:focus-within{border-color:var(--signal);box-shadow:0 0 0 3px rgba(232,85,43,.14);}
.kbd{
  flex:0 0 auto;font-family:var(--font-num);font-size:11px;color:var(--muted);
  border:1px solid var(--line);border-radius:5px;background:var(--paper);padding:1px 5px;line-height:1.5;
}
.icon-btn{
  width:36px;height:36px;display:grid;place-items:center;border-radius:8px;
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.icon-btn:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px);}
.nav-toggle{
  display:none;width:38px;height:36px;border-radius:8px;border:1px solid var(--line);
  background:var(--surface);color:var(--ink);align-items:center;justify-content:center;
}
.nav-toggle svg{pointer-events:none;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 20px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;line-height:1;cursor:pointer;
  border:1px solid transparent;text-align:center;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-primary{background:var(--signal);border-color:var(--signal);color:#fff;}
.btn-primary:hover{background:var(--signal-dark);border-color:var(--signal-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -12px rgba(232,85,43,.75);}
.btn-primary:active{transform:translateY(0);box-shadow:none;}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.btn-block{width:100%;}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink);
}
.link-arrow svg{transition:transform .2s var(--ease);}
.link-arrow:hover{color:var(--signal);}
.link-arrow:hover svg{transform:translateX(3px);}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.08em;
  padding:5px 12px;border-radius:999px;line-height:1.4;
  border:1px solid var(--line);background:var(--surface);color:var(--muted);
}
.tag-teal{color:var(--teal);border-color:rgba(31,111,99,.28);background:rgba(31,111,99,.07);}
.tag-signal{color:var(--signal-dark);border-color:rgba(232,85,43,.3);background:var(--signal-soft);}
.tag-invert{color:#F6F4EF;border-color:rgba(246,244,239,.24);background:rgba(246,244,239,.1);}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;
  background-color:var(--ink);
  background-image:url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  color:#F6F4EF;
  padding:clamp(36px,5vw,56px) 0 clamp(44px,6vw,68px);
}
.article-hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(20,22,26,.94) 0%,rgba(20,22,26,.86) 58%,rgba(20,22,26,.72) 100%);
}
.article-hero .container{position:relative;z-index:1;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:#A9ADA8;margin-bottom:22px;
}
.breadcrumb a{color:#A9ADA8;}
.breadcrumb a:hover{color:#F6F4EF;}
.breadcrumb .sep{opacity:.5;}
.breadcrumb .current{color:#F6F4EF;}
.article-title{
  font-size:clamp(28px,3.6vw,46px);
  font-weight:700;line-height:1.22;letter-spacing:-.015em;
  color:#F6F4EF;max-width:20ch;margin:16px 0 0;
}
.article-title.long{max-width:28ch;}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px 14px;
  margin-top:24px;font-size:14px;color:#A9ADA8;
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(246,244,239,.35);}
.article-meta .strong{color:#F6F4EF;font-weight:600;}

/* ---------- layout ---------- */
.article-section{padding:clamp(48px,6vw,84px) 0 var(--section-gap);}
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 244px;
  gap:clamp(32px,5vw,72px);justify-content:center;align-items:start;
}

/* ---------- content typography ---------- */
.article-content{font-size:16.5px;line-height:1.9;color:#22252A;min-width:0;}
.article-content > *:first-child{margin-top:0;}
.article-content p{margin:0 0 22px;letter-spacing:.012em;}
.article-content h2{
  position:relative;font-size:clamp(22px,2.4vw,28px);font-weight:700;line-height:1.35;
  letter-spacing:-.01em;color:var(--ink);margin:46px 0 18px;padding-left:16px;scroll-margin-top:92px;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.34em;width:4px;height:1em;border-radius:2px;background:var(--signal);
}
.article-content h3{
  font-size:20px;font-weight:600;line-height:1.45;color:var(--ink);
  margin:36px 0 14px;scroll-margin-top:92px;
}
.article-content a{
  color:var(--ink);text-decoration:underline;
  text-decoration-color:rgba(232,85,43,.55);text-decoration-thickness:1px;text-underline-offset:3px;
}
.article-content a:hover{color:var(--signal-dark);text-decoration-color:var(--signal);}
.article-content strong{font-weight:600;color:var(--ink);}
.article-content ul,.article-content ol{margin:0 0 22px;padding-left:1.25em;}
.article-content li{margin:0 0 10px;}
.article-content li::marker{color:var(--signal);}
.article-content img{border-radius:var(--radius-card);margin:26px 0;border:1px solid var(--line);}
.article-content figure{margin:26px 0;}
.article-content figcaption{font-size:13px;color:var(--muted);margin-top:10px;text-align:center;}
.article-content blockquote{
  margin:26px 0;padding:18px 24px;background:var(--surface);
  border-left:3px solid var(--teal);border-radius:0 var(--radius-card) var(--radius-card) 0;
  color:#3A3E43;font-size:16px;
}
.article-content blockquote p:last-child{margin-bottom:0;}
.article-content code{
  font-family:var(--font-num);font-size:.92em;background:var(--signal-soft);
  color:var(--signal-dark);padding:2px 6px;border-radius:5px;
}
.article-content pre{
  background:var(--ink);color:#F6F4EF;padding:18px 20px;border-radius:var(--radius-card);
  overflow-x:auto;font-size:14px;line-height:1.7;margin:26px 0;
}
.article-content pre code{background:transparent;color:inherit;padding:0;}
.article-content hr{border:0;border-top:1px solid var(--line);margin:38px 0;}
.article-content table{
  width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;
}
.article-content th,.article-content td{
  padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);
}
.article-content thead th{
  font-size:12.5px;font-weight:600;letter-spacing:.08em;color:var(--muted);
  background:#FBFAF6;text-transform:uppercase;
}
.article-content tbody tr:hover{background:#FBFAF6;}
.article-content tbody tr:last-child td{border-bottom:0;}

/* ---------- note / pager / related ---------- */
.article-note{
  margin:44px 0 0;padding:22px 24px;border:1px solid var(--line);border-radius:var(--radius-card);
  background:var(--surface);box-shadow:var(--shadow-card);
}
.article-note h3{
  margin:0 0 10px;font-size:13px;font-weight:600;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;
}
.article-note p{font-size:14.5px;line-height:1.8;color:#4A4E52;margin:0;}
.article-note a{text-decoration:underline;text-decoration-color:rgba(232,85,43,.5);text-underline-offset:3px;}
.article-note a:hover{color:var(--signal-dark);}

.article-pager{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:28px;
}
.pager-card{
  display:block;padding:20px 22px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.pager-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-hover);}
.pager-card .pager-label{
  display:block;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--muted);
  text-transform:uppercase;margin-bottom:8px;
}
.pager-card .pager-title{font-size:16px;font-weight:600;line-height:1.5;color:var(--ink);}
.pager-card:hover .pager-title{color:var(--signal-dark);}

.back-row{margin-top:32px;}

.related-block{padding-top:var(--section-gap);}
.related-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:24px;
  padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:32px;
}
.related-head h2{font-size:clamp(22px,2.6vw,30px);font-weight:700;letter-spacing:-.01em;margin-top:8px;}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.related-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  overflow:hidden;box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.related-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-hover);}
.related-card .thumb{aspect-ratio:16/10;overflow:hidden;background:#EDEAE2;}
.related-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .32s var(--ease);}
.related-card:hover .thumb img{transform:scale(1.03);}
.related-card .body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.related-card h3{font-size:17px;font-weight:600;line-height:1.5;letter-spacing:-.005em;}
.related-card p{font-size:14px;line-height:1.75;color:var(--muted);margin:0;}
.related-card .foot{margin-top:auto;padding-top:14px;font-size:14px;font-weight:600;color:var(--ink);display:flex;align-items:center;gap:6px;}
.related-card:hover .foot{color:var(--signal-dark);}
.related-card:hover .foot svg{transform:translateX(3px);}
.related-card .foot svg{transition:transform .2s var(--ease);}

/* ---------- toc ---------- */
.article-aside{position:relative;}
.toc-card{
  position:sticky;top:92px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:20px 20px 16px;box-shadow:var(--shadow-card);
}
.toc-card h3{
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:var(--muted);margin:0 0 14px;
}
.toc-list{list-style:none;margin:0;padding:0;}
.toc-list li{margin:0;}
.toc-list a{
  display:block;padding:7px 0 7px 13px;font-size:14px;line-height:1.55;color:var(--muted);
  border-left:1px solid var(--line);transition:color .18s var(--ease),border-color .18s var(--ease);
}
.toc-list a:hover{color:var(--ink);border-color:var(--line-soft);}
.toc-list a.active{color:var(--signal-dark);border-color:var(--signal);font-weight:600;}
.toc-list .toc-sub a{padding-left:26px;font-size:13px;}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed var(--line-soft);border-radius:var(--radius-card);
  background:var(--surface);padding:48px 28px;text-align:center;
}
.empty-state .empty-icon{
  width:52px;height:52px;margin:0 auto 18px;border-radius:14px;
  display:grid;place-items:center;background:var(--signal-soft);color:var(--signal);
}
.empty-state h2{font-size:22px;font-weight:700;margin-bottom:10px;}
.empty-state p{font-size:15px;color:var(--muted);max-width:44ch;margin:0 auto 24px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#F6F4EF;padding:clamp(56px,7vw,88px) 0 32px;margin-top:var(--section-gap);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-mark{background:#F6F4EF;color:var(--ink);}
.footer-brand .brand-text{color:#F6F4EF;}
.footer-brand .brand-badge{color:#A9ADA8;border-color:rgba(246,244,239,.2);}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9ADA8;max-width:40ch;}
.footer-col h3{
  font-size:12px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;
  color:#A9ADA8;margin:0 0 16px;
}
.footer-col ul{list-style:none;margin:0;padding:0;}
.footer-col li{font-size:14px;line-height:1.9;color:#A9ADA8;margin-bottom:8px;}
.footer-col a{color:#F6F4EF;}
.footer-col a:hover{color:var(--signal);}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid rgba(246,244,239,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:#8E928C;
}

/* ---------- mobile drawer ---------- */
.mobile-drawer{
  position:fixed;inset:0;z-index:1050;background:var(--paper);
  display:flex;flex-direction:column;padding:18px 20px 28px;
  transform:translateY(-10px);opacity:0;visibility:hidden;
  transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  overflow-y:auto;
}
body.drawer-open{overflow:hidden;}
body.drawer-open .mobile-drawer{opacity:1;visibility:visible;transform:translateY(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-close{
  width:38px;height:38px;border-radius:8px;border:1px solid var(--line);background:var(--surface);
  color:var(--ink);display:grid;place-items:center;font-size:20px;line-height:1;
}
.drawer-search{margin-bottom:22px;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  padding:14px 4px;font-size:19px;font-weight:600;border-bottom:1px solid var(--line);
}
.drawer-nav a:last-child{border-bottom:0;}
.drawer-nav a:hover{color:var(--signal);}
.drawer-cta{margin-top:24px;}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,760px);}
  .article-aside{display:none;}
  .related-grid{grid-template-columns:repeat(3,minmax(0,1fr));}
}
@media (max-width:991px){
  .main-nav,.command-search,.header-cta{display:none;}
  .nav-toggle{display:inline-flex;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .article-title{max-width:26ch;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .article-content{font-size:16px;line-height:1.85;}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;}
  .related-grid{grid-template-columns:1fr;}
  .article-pager{grid-template-columns:1fr;}
  .related-head{flex-direction:column;align-items:flex-start;gap:12px;}
}
@media (max-width:575px){
  .container{padding:0 16px;}
  .header-inner{height:62px;gap:12px;}
  .brand-text{font-size:15px;}
  .article-title{max-width:none;font-size:26px;}
  .btn{width:100%;}
  .article-meta{font-size:13px;gap:8px 10px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;}
  .article-note{padding:18px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
}

/* roulang page: category2 */
:root{
  --ink:#14161A;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E5E1D8;
  --line-soft:#DCD8CE;
  --muted:#6B6F73;
  --signal:#E8552B;
  --signal-dark:#C8441F;
  --teal:#1F6F63;
  --tint:#FDF1EC;
  --row-hover:#FBFAF6;
  --on-dark:#F6F4EF;
  --on-dark-muted:#A9ADA8;
  --radius-btn:8px;
  --radius-card:12px;
  --radius-tbl:14px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04), 0 12px 32px -16px rgba(20,22,26,.12);
  --shadow-hover:0 1px 2px rgba(20,22,26,.05), 0 18px 42px -18px rgba(20,22,26,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --container:1200px;
  --container-wide:1320px;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Space Grotesk","DIN Alternate","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
a:hover{color:var(--signal);}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding-left:0;list-style:none;}
::selection{background:rgba(232,85,43,.16);}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;border-radius:4px;}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.container-wide{max-width:var(--container-wide);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:1000;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 1px 0 rgba(20,22,26,.05),0 14px 28px -22px rgba(20,22,26,.4);}
.nav-bar{
  min-height:68px;
  display:flex;
  align-items:center;
  gap:24px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-weight:700;
  letter-spacing:-.01em;
  flex:0 0 auto;
}
.brand:hover{color:var(--ink);}
.brand-mark{
  width:32px;height:32px;
  border-radius:8px;
  background:var(--ink);
  color:var(--paper);
  font-family:var(--font-num);
  font-size:14px;
  font-weight:500;
  letter-spacing:.04em;
  display:inline-flex;
  align-items:center;
  justify-content:center;
}
.brand-text{
  font-size:16.5px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  white-space:nowrap;
}
.brand-badge{
  font-size:11px;
  font-weight:600;
  letter-spacing:.12em;
  color:var(--teal);
  border:1px solid rgba(31,111,99,.32);
  border-radius:999px;
  padding:1px 8px;
  line-height:1.6;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:2px;
  margin-left:8px;
}
.main-nav a{
  position:relative;
  padding:8px 17px;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  border-radius:6px;
  transition:color .14s var(--ease);
  white-space:nowrap;
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:17px;right:17px;bottom:4px;
  height:1.5px;
  background:var(--signal);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--signal);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--signal);font-weight:600;}
.main-nav a.active::after{transform:scaleX(1);}
.nav-right{
  margin-left:auto;
  display:flex;
  align-items:center;
  gap:12px;
}
.command-search{
  display:flex;
  align-items:center;
  gap:8px;
  height:36px;
  padding:0 10px;
  background:var(--surface);
  border:1px solid var(--line-soft);
  border-radius:8px;
  transition:border-color .14s var(--ease),box-shadow .14s var(--ease);
}
.command-search:focus-within{
  border-color:var(--signal);
  box-shadow:0 0 0 2px rgba(232,85,43,.16);
}
.command-search input{
  border:0;
  outline:0;
  background:transparent;
  font-size:14px;
  color:var(--ink);
  width:150px;
  font-family:inherit;
}
.command-search input::placeholder{color:var(--muted);}
.kbd{
  font-family:var(--font-num);
  font-size:11px;
  color:var(--muted);
  border:1px solid var(--line-soft);
  border-radius:999px;
  padding:1px 7px;
  line-height:1.6;
  background:var(--paper);
}
.icon-btn{
  width:36px;height:36px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line-soft);
  border-radius:8px;
  background:var(--surface);
  color:var(--ink);
  transition:border-color .14s var(--ease),color .14s var(--ease),transform .14s var(--ease);
}
.icon-btn:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px);}
.btn-primary-ink,
.btn-signal,
.btn-ghost,
.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-btn);font-weight:600;font-size:15px;line-height:1;border:1px solid transparent;transition:all .14s var(--ease);cursor:pointer;}
.btn-signal{
  background:var(--signal);
  color:#fff;
  height:46px;
  padding:0 22px;
}
.btn-signal:hover{background:var(--signal-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -12px rgba(232,85,43,.7);}
.btn-ghost{
  height:46px;
  padding:0 22px;
  background:transparent;
  border-color:var(--ink);
  color:var(--ink);
}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px);}
.btn-sm{height:38px;padding:0 16px;font-size:14px;}
.nav-cta{height:38px;padding:0 18px;font-size:14.5px;background:var(--ink);color:var(--paper);border-radius:var(--radius-btn);}
.nav-cta:hover{background:#000;color:var(--paper);transform:translateY(-1px);}
.btn-text{
  background:transparent;
  color:var(--ink);
  height:auto;
  padding:0;
  border:0;
  font-size:15px;
}
.btn-text .arrow{transition:transform .14s var(--ease);}
.btn-text:hover{color:var(--signal);}
.btn-text:hover .arrow{transform:translateX(2px);}
.nav-toggle{
  display:none;
  width:38px;height:38px;
  align-items:center;
  justify-content:center;
  background:var(--surface);
  border:1px solid var(--line-soft);
  border-radius:8px;
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  width:16px;height:1.6px;
  background:var(--ink);
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";
  position:absolute;left:0;
  width:16px;height:1.6px;
  background:var(--ink);
  transition:transform .2s var(--ease);
}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}
.mobile-drawer{
  display:none;
  border-top:1px solid var(--line);
  background:var(--paper);
  padding:18px 0 26px;
}
body.nav-open .mobile-drawer{display:block;}
.mobile-drawer .drawer-search{margin-bottom:16px;}
.mobile-drawer .drawer-search .command-search{height:44px;width:100%;}
.mobile-drawer .drawer-search .command-search input{width:100%;font-size:15px;}
.mobile-drawer nav{display:flex;flex-direction:column;}
.mobile-drawer nav a{
  padding:14px 2px;
  font-size:18px;
  font-weight:600;
  border-bottom:1px solid var(--line-soft);
}
.mobile-drawer nav a.active{color:var(--signal);}
.mobile-drawer .drawer-cta{margin-top:18px;}
.mobile-drawer .drawer-cta .btn-signal{width:100%;}

/* ---------- Hero ---------- */
.page-hero{
  padding:clamp(48px,6vw,84px) 0 clamp(40px,5vw,64px);
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(1100px 380px at 82% -10%, rgba(31,111,99,.06), transparent 70%),
    var(--paper);
}
.crumbs{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:26px;
  flex-wrap:wrap;
}
.crumbs a{color:var(--muted);}
.crumbs a:hover{color:var(--signal);}
.crumbs .sep{opacity:.55;}
.hero-grid{
  display:grid;
  grid-template-columns:1.15fr .85fr;
  gap:clamp(32px,5vw,64px);
  align-items:center;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-num);
  font-size:12px;
  font-weight:500;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--teal);
  margin-bottom:20px;
}
.eyebrow::before{
  content:"";
  width:26px;height:1px;
  background:var(--teal);
  display:inline-block;
}
h1{
  font-size:clamp(34px,4.6vw,58px);
  line-height:1.1;
  letter-spacing:-.02em;
  font-weight:700;
  margin-bottom:22px;
}
h1 .accent{color:var(--signal);}
.hero-lead{
  font-size:17px;
  color:var(--muted);
  max-width:50ch;
  line-height:1.85;
}
.hero-actions{
  display:flex;
  gap:14px;
  margin-top:32px;
  flex-wrap:wrap;
}
.hero-figure{
  position:relative;
  border:1px solid var(--line);
  border-radius:var(--radius-tbl);
  background:var(--surface);
  padding:12px;
  box-shadow:var(--shadow-card);
}
.hero-figure img{
  width:100%;
  aspect-ratio:16/11;
  object-fit:cover;
  border-radius:10px;
}
.hero-figure .figure-tag{
  position:absolute;
  left:26px;bottom:26px;
  background:rgba(20,22,26,.86);
  color:var(--paper);
  font-size:12.5px;
  letter-spacing:.04em;
  padding:6px 12px;
  border-radius:999px;
}
.stat-strip{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  margin-top:clamp(38px,4vw,56px);
  border-top:1px solid var(--line);
  padding-top:26px;
}
.stat-item{
  padding:0 22px;
  border-left:1px solid var(--line);
}
.stat-item:first-child{border-left:0;padding-left:0;}
.stat-num{
  font-family:var(--font-num);
  font-size:clamp(22px,2.4vw,30px);
  font-weight:500;
  letter-spacing:-.01em;
  line-height:1.2;
  opacity:0;
  transform:translateY(12px);
}
.stat-num.in{opacity:1;transform:translateY(0);transition:opacity .32s var(--ease),transform .32s var(--ease);}
.stat-label{
  font-size:13.5px;
  color:var(--muted);
  margin-top:4px;
}

/* ---------- 通用板块 ---------- */
.section{padding:clamp(60px,7.5vw,110px) 0;}
.section-head{
  max-width:720px;
  margin-bottom:clamp(30px,3.4vw,44px);
}
.section-head .tag{
  display:inline-block;
  font-family:var(--font-num);
  font-size:12px;
  font-weight:600;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--teal);
  margin-bottom:14px;
}
h2{
  font-size:clamp(26px,3.2vw,40px);
  line-height:1.2;
  letter-spacing:-.015em;
  font-weight:700;
  margin-bottom:16px;
}
.section-head p{color:var(--muted);max-width:66ch;}
h3{font-size:20px;font-weight:600;line-height:1.4;letter-spacing:-.005em;}

/* ---------- 权益矩阵表 ---------- */
.matrix-note{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-bottom:22px;
}
.chip{
  display:inline-flex;
  align-items:center;
  gap:6px;
  font-size:13px;
  color:var(--muted);
  background:var(--surface);
  border:1px solid var(--line-soft);
  border-radius:999px;
  padding:5px 13px;
}
.chip b{color:var(--ink);font-weight:600;}
.table-wrap{
  border:1px solid var(--line);
  border-radius:var(--radius-tbl);
  background:var(--surface);
  overflow-x:auto;
  box-shadow:var(--shadow-card);
  -webkit-overflow-scrolling:touch;
}
table.benefit-table{
  width:100%;
  min-width:760px;
  border-collapse:collapse;
  font-size:15px;
}
.benefit-table thead th{
  font-family:var(--font-num);
  font-size:12.5px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
  text-align:left;
  padding:20px 20px;
  border-bottom:1px solid var(--line);
  background:var(--surface);
  vertical-align:bottom;
  white-space:nowrap;
}
.benefit-table thead th:first-child{color:var(--ink);letter-spacing:.02em;font-family:var(--font-cn);font-size:13.5px;}
.benefit-table td{
  padding:17px 20px;
  border-bottom:1px solid var(--line);
  vertical-align:middle;
  color:var(--ink);
}
.benefit-table tbody tr:last-child td{border-bottom:0;}
.benefit-table tbody tr{transition:background .14s var(--ease);}
.benefit-table tbody tr:hover td{background:var(--row-hover);}
.benefit-table td:first-child{
  font-weight:600;
  position:sticky;
  left:0;
  background:var(--surface);
  z-index:2;
  box-shadow:1px 0 0 var(--line);
  min-width:190px;
}
.benefit-table tbody tr:hover td:first-child{background:var(--row-hover);}
.benefit-table .col-reco{background:var(--tint);}
.benefit-table thead th.col-reco{
  background:var(--tint);
  border-top:3px solid var(--signal);
  color:var(--signal);
  position:relative;
}
.benefit-table tbody tr:hover td.col-reco{background:#FCEAE2;}
.reco-tag{
  display:inline-block;
  font-family:var(--font-cn);
  font-size:11px;
  font-weight:600;
  letter-spacing:.06em;
  color:#fff;
  background:var(--signal);
  border-radius:999px;
  padding:1px 8px;
  margin-left:6px;
  vertical-align:middle;
}
.tick{
  display:inline-flex;
  align-items:center;
  gap:7px;
  font-size:14.5px;
}
.tick svg{flex:0 0 auto;}
.tick.dim{color:var(--muted);}
.matrix-foot{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:14px;
  margin-top:18px;
  font-size:13.5px;
  color:var(--muted);
}

/* ---------- 三档等级说明 ---------- */
.tier-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
  align-items:start;
}
.tier-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  padding:28px 26px 26px;
  box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  position:relative;
}
.tier-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-hover);}
.tier-card.reco{border-color:rgba(232,85,43,.55);}
.tier-card.reco::before{
  content:"";
  position:absolute;
  top:0;left:24px;right:24px;
  height:3px;
  background:var(--signal);
  border-radius:0 0 4px 4px;
}
.tier-shift{transform:translateY(-22px);}
.tier-shift:hover{transform:translateY(-24px);}
.tier-index{
  font-family:var(--font-num);
  font-size:34px;
  font-weight:500;
  line-height:1;
  letter-spacing:-.02em;
  color:var(--ink);
  padding-bottom:14px;
  margin-bottom:16px;
  position:relative;
}
.tier-index::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:38px;height:2px;
  background:var(--teal);
  opacity:.7;
}
.tier-card.reco .tier-index::after{background:var(--signal);opacity:1;}
.tier-name{font-size:19px;font-weight:700;margin-bottom:6px;}
.tier-desc{font-size:14.5px;color:var(--muted);margin-bottom:18px;line-height:1.8;}
.tier-list{display:flex;flex-direction:column;gap:10px;margin-bottom:22px;}
.tier-list li{
  display:flex;
  gap:9px;
  font-size:14.5px;
  line-height:1.7;
  color:var(--ink);
}
.tier-list li::before{
  content:"";
  flex:0 0 auto;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--teal);
  margin-top:9px;
  opacity:.75;
}
.tier-card.reco .tier-list li::before{background:var(--signal);opacity:1;}
.tier-foot{
  border-top:1px solid var(--line);
  padding-top:16px;
  font-size:13.5px;
  color:var(--muted);
}

/* ---------- 生效与变更 ---------- */
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(32px,5vw,64px);
  align-items:center;
}
.split-figure{
  border:1px solid var(--line);
  border-radius:var(--radius-tbl);
  background:var(--surface);
  padding:12px;
  box-shadow:var(--shadow-card);
}
.split-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:10px;}
.step-list{counter-reset:step;margin-top:26px;}
.step-list li{
  display:flex;
  gap:16px;
  padding:18px 0;
  border-top:1px solid var(--line);
}
.step-list li:first-child{border-top:0;padding-top:4px;}
.step-list .num{
  font-family:var(--font-num);
  font-size:14px;
  font-weight:500;
  color:var(--teal);
  flex:0 0 auto;
  width:32px;
  padding-top:3px;
}
.step-list strong{display:block;font-size:16px;font-weight:600;margin-bottom:4px;}
.step-list p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ---------- 交叉链接 ---------- */
.cross-links{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  padding:30px 0;
}
.cross-inner{
  display:flex;
  align-items:center;
  gap:18px;
  flex-wrap:wrap;
}
.cross-title{
  font-size:13px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
  font-family:var(--font-num);
  margin-right:6px;
}
.cross-links a{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  font-weight:500;
  padding:8px 16px;
  border:1px solid var(--line-soft);
  border-radius:999px;
  background:var(--surface);
  transition:border-color .14s var(--ease),color .14s var(--ease),transform .14s var(--ease);
}
.cross-links a:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px);}
.cross-links a.is-current{
  border-color:var(--ink);
  background:var(--ink);
  color:var(--paper);
  pointer-events:none;
}

/* ---------- 轻量 CTA ---------- */
.cta-panel{
  background:var(--ink);
  color:var(--on-dark);
  border-radius:var(--radius-tbl);
  padding:clamp(32px,4.4vw,56px);
  display:grid;
  grid-template-columns:1.3fr .7fr;
  gap:clamp(28px,4vw,56px);
  align-items:center;
}
.cta-panel h2{color:var(--on-dark);margin-bottom:14px;}
.cta-panel p{color:var(--on-dark-muted);max-width:52ch;}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:22px;}
.cta-points li{
  display:flex;
  gap:10px;
  font-size:14.5px;
  color:var(--on-dark-muted);
}
.cta-points li::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--signal);
  flex:0 0 auto;
  margin-top:9px;
}
.cta-actions{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.cta-actions .btn-signal{width:100%;}
.cta-actions .btn-ghost{
  width:100%;
  color:var(--on-dark);
  border-color:rgba(246,244,239,.32);
}
.cta-actions .btn-ghost:hover{background:var(--on-dark);color:var(--ink);border-color:var(--on-dark);}
.cta-hint{font-size:13px;color:var(--on-dark-muted);text-align:center;}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);
  color:var(--on-dark);
  padding:clamp(56px,6vw,84px) 0 0;
  margin-top:clamp(56px,6vw,96px);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:clamp(24px,3.4vw,48px);
  padding-bottom:clamp(36px,4vw,56px);
}
.footer-brand .brand{color:var(--on-dark);margin-bottom:18px;}
.footer-brand .brand-mark{background:var(--paper);color:var(--ink);}
.footer-brand .brand-badge{color:var(--on-dark-muted);border-color:rgba(246,244,239,.28);}
.footer-brand p{
  font-size:14px;
  color:var(--on-dark-muted);
  line-height:1.9;
  max-width:40ch;
}
.footer-col h3{
  font-family:var(--font-num);
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--on-dark-muted);
  margin-bottom:18px;
}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col li{font-size:14px;color:var(--on-dark-muted);line-height:1.7;}
.footer-col a{color:var(--on-dark);transition:color .14s var(--ease);}
.footer-col a:hover{color:var(--signal);}
.footer-bottom{
  border-top:1px solid rgba(246,244,239,.12);
  padding:22px 0 26px;
  display:flex;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--on-dark-muted);
  font-family:var(--font-num);
  letter-spacing:.01em;
}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .container{max-width:100%;}
  .main-nav a{padding:8px 12px;font-size:14.5px;}
  .command-search input{width:118px;}
}
@media (max-width:991.98px){
  .main-nav,.nav-right .command-search,.nav-right .icon-btn{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-right .nav-cta{display:none;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-figure{order:-1;}
  .stat-strip{grid-template-columns:repeat(2,1fr);row-gap:22px;}
  .stat-item:nth-child(3){border-left:0;padding-left:0;}
  .tier-grid{grid-template-columns:1fr;gap:20px;}
  .tier-shift{transform:none;}
  .tier-shift:hover{transform:translateY(-2px);}
  .split{grid-template-columns:1fr;}
  .split-figure{order:-1;}
  .cta-panel{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:575.98px){
  body{font-size:16px;line-height:1.8;}
  .container{padding:0 18px;}
  .nav-bar{min-height:62px;gap:12px;}
  .brand-text{font-size:15.5px;}
  .hero-actions .btn-signal,
  .hero-actions .btn-ghost{width:100%;}
  .stat-strip{grid-template-columns:1fr;gap:18px;}
  .stat-item{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:16px;}
  .stat-item:first-child{border-top:0;padding-top:0;}
  .benefit-table td:first-child,
  .benefit-table thead th:first-child{min-width:150px;font-size:14px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;gap:6px;}
  .cross-inner{gap:10px;}
  .cross-title{width:100%;margin:0 0 4px;}
  .cross-links a{font-size:13.5px;padding:7px 13px;}
  .tier-card{padding:24px 20px;}
  .cta-actions .btn-signal,
  .cta-actions .btn-ghost{height:48px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .stat-num{opacity:1;transform:none;}
}

/* roulang page: category3 */
:root{
  --ink:#14161A;
  --ink-soft:#3A3E42;
  --paper:#F6F4EF;
  --paper-deep:#FBFAF6;
  --surface:#FFFFFF;
  --line:#E5E1D8;
  --line-soft:#DCD8CE;
  --muted:#6B6F73;
  --signal:#E8552B;
  --signal-dark:#C8441F;
  --signal-tint:#FDF1EC;
  --teal:#1F6F63;
  --radius-btn:8px;
  --radius-card:12px;
  --radius-media:14px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04), 0 12px 32px -16px rgba(20,22,26,.12);
  --shadow-lift:0 2px 4px rgba(20,22,26,.05), 0 22px 44px -20px rgba(20,22,26,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Space Grotesk","DIN Alternate","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .14s var(--ease)}
a:hover{color:var(--signal-dark)}
button{font-family:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(232,85,43,.18);color:var(--ink)}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:clamp(56px,7vw,96px) 0}
.section-tight{padding:clamp(40px,5vw,64px) 0}
section[id],div[id^="block-"]{scroll-margin-top:96px}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1040;
  background:rgba(246,244,239,.96);
  border-bottom:1px solid var(--line);
  transition:box-shadow .22s var(--ease),background .22s var(--ease);
}
.site-header.scrolled{box-shadow:0 10px 28px -22px rgba(20,22,26,.65)}
.header-inner{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:8px;background:var(--ink);color:var(--paper);
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:14px;font-weight:600;letter-spacing:.04em;
}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--ink);display:inline-flex;align-items:center;gap:6px;white-space:nowrap}
.brand-badge{
  font-size:11px;font-weight:600;letter-spacing:.06em;color:var(--teal);
  border:1px solid rgba(31,111,99,.35);border-radius:999px;padding:1px 7px;line-height:1.6;
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px;flex:1 1 auto}
.main-nav a{
  position:relative;display:inline-block;padding:8px 14px;font-size:15px;font-weight:500;color:var(--ink-soft);
  white-space:nowrap;border-radius:6px;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;background:var(--signal);
  transform:scaleX(0);transform-origin:left center;transition:transform .22s var(--ease);
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a.active{color:var(--ink);font-weight:600}
.header-right{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.command-search{
  position:relative;display:flex;align-items:center;
  width:210px;height:36px;padding:0 8px 0 12px;
  background:var(--paper-deep);border:1px solid var(--line);border-radius:8px;
  transition:border-color .14s var(--ease),box-shadow .14s var(--ease);
}
.command-search:focus-within{border-color:var(--signal);box-shadow:0 0 0 2px rgba(232,85,43,.16)}
.command-search input{
  flex:1 1 auto;min-width:0;border:0;background:transparent;outline:none;
  font-family:var(--font-sans);font-size:13px;color:var(--ink);
}
.command-search input::placeholder{color:var(--muted)}
.kbd{
  flex:0 0 auto;font-family:var(--font-num);font-size:11px;font-weight:500;color:var(--muted);
  border:1px solid var(--line-soft);border-radius:999px;padding:1px 6px;background:var(--surface);line-height:1.5;
}
.icon-link{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:8px;background:var(--surface);color:var(--ink-soft);
  transition:border-color .14s var(--ease),color .14s var(--ease),transform .14s var(--ease);
}
.icon-link:hover{color:var(--signal);border-color:var(--signal);transform:translateY(-1px)}
.icon-link svg{width:16px;height:16px}
.menu-toggle{
  display:none;width:40px;height:36px;border:1px solid var(--line);border-radius:8px;background:var(--surface);
  align-items:center;justify-content:center;cursor:pointer;padding:0;
}
.menu-toggle span{display:block;width:16px;height:1.5px;background:var(--ink);position:relative}
.menu-toggle span::before,.menu-toggle span::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--ink)}
.menu-toggle span::before{top:-5px}
.menu-toggle span::after{top:5px}
.mobile-drawer{
  display:none;position:fixed;inset:68px 0 0 0;z-index:1035;
  background:var(--paper);border-top:1px solid var(--line);
  padding:20px 24px 96px;overflow-y:auto;
}
.mobile-drawer.open{display:block}
.mobile-drawer .command-search{width:100%;height:44px;margin-bottom:20px}
.mobile-drawer nav{display:flex;flex-direction:column}
.mobile-drawer nav a{
  padding:14px 2px;font-size:19px;font-weight:600;border-bottom:1px solid var(--line);color:var(--ink);
}
.mobile-drawer nav a.active{color:var(--signal)}
.mobile-drawer .drawer-cta{position:fixed;left:0;right:0;bottom:0;padding:14px 24px calc(14px + env(safe-area-inset-bottom));background:var(--paper);border-top:1px solid var(--line)}
.mobile-drawer .drawer-cta .btn{width:100%}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--radius-btn);border:1px solid transparent;
  font-family:var(--font-sans);font-size:15px;font-weight:600;letter-spacing:.01em;
  cursor:pointer;text-align:center;
  transition:background-color .14s var(--ease),color .14s var(--ease),border-color .14s var(--ease),transform .14s var(--ease),box-shadow .14s var(--ease);
}
.btn-sm{height:36px;padding:0 14px;font-size:13px;border-radius:8px}
.btn-primary{background:var(--signal);color:#fff}
.btn-primary:hover{background:var(--signal-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -14px rgba(200,68,31,.9)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-outline-light{background:transparent;border-color:rgba(246,244,239,.45);color:var(--paper)}
.btn-outline-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper);transform:translateY(-1px)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-weight:600;font-size:15px;color:var(--ink);border-bottom:1px solid rgba(232,85,43,.4);padding-bottom:2px}
.link-arrow svg{width:14px;height:14px;transition:transform .14s var(--ease)}
.link-arrow:hover{color:var(--signal-dark);border-bottom-color:var(--signal-dark)}
.link-arrow:hover svg{transform:translateX(3px)}

/* ---------- 面包屑 ---------- */
.breadcrumb-nav{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:26px 0 0;font-size:13px;color:var(--muted)}
.breadcrumb-nav a{color:var(--muted)}
.breadcrumb-nav a:hover{color:var(--signal-dark)}
.breadcrumb-nav .sep{color:var(--line-soft);font-family:var(--font-num)}
.breadcrumb-nav [aria-current]{color:var(--ink);font-weight:600}

/* ---------- Hero ---------- */
.page-hero{padding:clamp(28px,4vw,48px) 0 clamp(48px,6vw,80px)}
.hero-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(28px,4vw,56px);align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--teal);text-transform:uppercase;margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--teal);opacity:.6}
h1{
  font-size:clamp(32px,4.4vw,56px);font-weight:700;line-height:1.14;letter-spacing:-.02em;color:var(--ink);
  margin-bottom:20px;
}
.lede{font-size:17px;line-height:1.85;color:var(--ink-soft);max-width:60ch;margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.hero-metrics{display:flex;flex-wrap:wrap;gap:14px 40px;padding-top:24px;border-top:1px solid var(--line)}
.metric{min-width:96px}
.metric-num{display:block;font-family:var(--font-num);font-size:26px;font-weight:500;line-height:1.2;color:var(--ink);letter-spacing:-.01em}
.metric-label{display:block;font-size:12.5px;color:var(--muted);letter-spacing:.02em;margin-top:2px}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-media);
  border:1px solid var(--line);box-shadow:var(--shadow-card);
}
.hero-float{
  position:absolute;left:-18px;bottom:-22px;width:min(260px,80%);
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:16px 18px;box-shadow:var(--shadow-lift);
}
.hero-float .hf-title{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;margin-bottom:6px}
.hero-float .hf-main{font-family:var(--font-num);font-size:17px;font-weight:500;color:var(--ink);line-height:1.5}
.hero-float .hf-sub{font-size:13px;color:var(--muted);margin-top:4px}

/* ---------- 板块标题 ---------- */
.section-head{max-width:760px;margin-bottom:clamp(28px,3.4vw,44px)}
.section-kicker{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--muted);
  text-transform:uppercase;margin-bottom:12px;
}
h2{font-size:clamp(26px,3.2vw,38px);font-weight:700;line-height:1.24;letter-spacing:-.015em;color:var(--ink)}
.section-head p{margin-top:12px;color:var(--ink-soft);font-size:16.5px;max-width:64ch}

/* ---------- 三步流程 ---------- */
.steps-wrap{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-media);padding:clamp(26px,3.4vw,44px);box-shadow:var(--shadow-card)}
.steps{position:relative;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(20px,3vw,36px)}
.steps::before{
  content:"";position:absolute;left:8px;right:8px;top:26px;height:1px;background:var(--line-soft);
}
.step{position:relative;padding-top:0}
.step-num{
  position:relative;z-index:1;display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:50%;background:var(--paper);border:1px solid var(--line-soft);
  font-family:var(--font-num);font-size:17px;font-weight:500;color:var(--ink);letter-spacing:.02em;
  margin-bottom:18px;
}
.step:first-child .step-num{border-color:var(--signal);color:var(--signal)}
.step h3{font-size:19px;font-weight:700;line-height:1.4;margin-bottom:8px}
.step p{font-size:15.5px;color:var(--ink-soft);line-height:1.8;margin-bottom:14px}
.step-meta{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-num);font-size:12.5px;color:var(--teal);letter-spacing:.04em}
.step-meta::before{content:"";width:14px;height:1px;background:var(--teal);opacity:.7}
.step-list li{position:relative;padding-left:18px;font-size:15px;color:var(--ink-soft);line-height:1.8}
.step-list li+li{margin-top:6px}
.step-list li::before{content:"";position:absolute;left:0;top:11px;width:6px;height:6px;border-radius:50%;border:1px solid var(--line-soft);background:var(--paper)}

/* ---------- 图文块 ---------- */
.feature-row{display:grid;grid-template-columns:minmax(0,6fr) minmax(0,6fr);gap:clamp(24px,4vw,56px);align-items:center}
.feature-row.reverse .feature-media{order:2}
.feature-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-media);border:1px solid var(--line);box-shadow:var(--shadow-card)}
.feature-body h3{font-size:clamp(21px,2.2vw,26px);font-weight:700;line-height:1.35;margin-bottom:12px}
.feature-body p{font-size:16px;color:var(--ink-soft);margin-bottom:18px}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.tag{
  display:inline-flex;align-items:center;font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--teal);background:rgba(31,111,99,.07);border:1px solid rgba(31,111,99,.22);
  border-radius:999px;padding:3px 11px;line-height:1.6;
}
.tag.signal{color:var(--signal-dark);background:var(--signal-tint);border-color:rgba(232,85,43,.26)}
.check-list{display:grid;gap:10px}
.check-list li{position:relative;padding-left:26px;font-size:15.5px;color:var(--ink-soft);line-height:1.75}
.check-list li::before{
  content:"";position:absolute;left:0;top:8px;width:14px;height:8px;
  border-left:1.5px solid var(--ink);border-bottom:1.5px solid var(--ink);
  transform:rotate(-45deg);opacity:.75;
}
.note-card{
  margin-top:28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:24px 26px;box-shadow:var(--shadow-card);
}
.note-card h3{font-size:17px;font-weight:700;margin-bottom:12px}
.note-card p{font-size:15px;color:var(--ink-soft);margin:0}

/* ---------- 准备清单矩阵 ---------- */
.prep-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-top:8px}
.prep-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:22px 22px 24px;box-shadow:var(--shadow-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.prep-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-lift)}
.prep-card .prep-idx{font-family:var(--font-num);font-size:12.5px;font-weight:500;color:var(--teal);letter-spacing:.08em;display:block;margin-bottom:10px}
.prep-card h3{font-size:16.5px;font-weight:700;margin-bottom:6px}
.prep-card p{font-size:14.5px;color:var(--muted);line-height:1.75;margin:0}

/* ---------- FAQ ---------- */
.faq-shell{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(24px,4vw,56px);align-items:start}
.faq-aside h2{margin-bottom:14px}
.faq-aside p{font-size:16px;color:var(--ink-soft);margin-bottom:20px;max-width:36ch}
.accordion.faq-list{--bs-accordion-border-color:transparent;--bs-accordion-bg:transparent;--bs-accordion-btn-focus-box-shadow:none}
.faq-list .accordion-item{background:transparent;border:0;border-top:1px solid var(--line)}
.faq-list .accordion-item:last-child{border-bottom:1px solid var(--line)}
.faq-list .accordion-header{margin:0}
.faq-list .accordion-button{
  position:relative;background:transparent;border:0;border-radius:0;
  padding:22px 48px 22px 0;font-family:var(--font-sans);font-size:17px;font-weight:600;line-height:1.6;
  color:var(--ink);box-shadow:none;transition:color .16s var(--ease);
}
.faq-list .accordion-button:not(.collapsed){color:var(--signal);background:transparent;box-shadow:none}
.faq-list .accordion-button:focus{box-shadow:none;outline:2px solid var(--signal);outline-offset:-4px}
.faq-list .accordion-button::after{
  background-image:none !important;content:"+";width:auto;height:auto;
  position:absolute;right:6px;top:50%;transform:translateY(-50%);margin:0;
  font-family:var(--font-num);font-size:22px;font-weight:400;line-height:1;color:var(--muted);
  transition:transform .22s var(--ease),color .22s var(--ease);
}
.faq-list .accordion-button:not(.collapsed)::after{transform:translateY(-50%) rotate(45deg);color:var(--signal)}
.faq-list .accordion-body{padding:0 0 26px;font-size:16px;line-height:1.85;color:var(--ink-soft);max-width:68ch}
.faq-list .accordion-body p{margin-bottom:10px}
.faq-list .accordion-body p:last-child{margin-bottom:0}

/* ---------- 交叉链接 ---------- */
.cross-links{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:clamp(30px,4vw,44px) 0}
.cross-links .cl-title{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--muted);text-transform:uppercase;margin-bottom:16px}
.chip-row{display:flex;flex-wrap:wrap;gap:10px}
.chip{
  display:inline-flex;align-items:center;gap:8px;height:38px;padding:0 16px;
  background:var(--surface);border:1px solid var(--line);border-radius:999px;
  font-size:14px;font-weight:500;color:var(--ink-soft);
  transition:border-color .16s var(--ease),color .16s var(--ease),transform .16s var(--ease),box-shadow .16s var(--ease);
}
.chip:hover{border-color:var(--signal);color:var(--signal-dark);transform:translateY(-1px);box-shadow:0 8px 18px -14px rgba(20,22,26,.6)}
.chip .chip-dot{width:5px;height:5px;border-radius:50%;background:var(--teal);opacity:.8}

/* ---------- 深色 CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-media);
  background-color:var(--ink);
  background-image:linear-gradient(105deg,rgba(20,22,26,.96) 0%,rgba(20,22,26,.9) 58%,rgba(20,22,26,.82) 100%),url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  color:var(--paper);
}
.cta-inner{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:clamp(24px,4vw,48px);align-items:center;padding:clamp(34px,4.4vw,56px)}
.cta-inner h2{color:var(--paper);font-size:clamp(24px,3vw,34px)}
.cta-inner p{color:#A9ADA8;font-size:16px;margin-top:12px;max-width:46ch}
.cta-points{display:grid;gap:10px;margin-top:22px}
.cta-points li{position:relative;padding-left:20px;font-size:15px;color:#D8D5CE;line-height:1.75}
.cta-points li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;border:1px solid var(--signal)}
.cta-actions{display:flex;flex-direction:column;gap:12px;justify-self:end;width:100%;max-width:320px}
.cta-actions .btn{width:100%}
.cta-actions .cta-hint{font-size:13px;color:#A9ADA8;text-align:center;line-height:1.7}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--paper);margin-top:clamp(56px,7vw,96px);padding:clamp(48px,6vw,76px) 0 26px}
.footer-grid{display:grid;grid-template-columns:minmax(0,4fr) repeat(3,minmax(0,2.6fr));gap:clamp(24px,3.4vw,48px)}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-mark{background:var(--paper);color:var(--ink)}
.footer-brand .brand-text{color:var(--paper)}
.footer-brand .brand-badge{color:#A9ADA8;border-color:rgba(246,244,239,.24)}
.footer-brand p{font-size:14px;line-height:1.85;color:#A9ADA8;max-width:42ch}
.footer-col h3{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#A9ADA8;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col li,.footer-col a{font-size:14px;line-height:1.7;color:#D8D5CE}
.footer-col a:hover{color:var(--signal)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;align-items:center;
  margin-top:clamp(32px,4vw,52px);padding-top:22px;border-top:1px solid rgba(246,244,239,.12);
  font-size:13px;color:#A9ADA8;
}

/* ---------- 动效 ---------- */
.reveal{opacity:1;transform:none}
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .32s var(--ease),transform .32s var(--ease)}
.js .reveal.in{opacity:1;transform:translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .main-nav a{padding:8px 10px;font-size:14.5px}
  .command-search{width:180px}
  .prep-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:991.98px){
  .main-nav,.header-right .command-search,.header-right .icon-link{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{gap:12px}
  .header-right{margin-left:auto}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{max-width:640px}
  .hero-float{left:auto;right:16px;bottom:-18px}
  .steps{grid-template-columns:1fr;gap:30px}
  .steps::before{left:26px;right:auto;top:6px;bottom:6px;width:1px;height:auto}
  .step{padding-left:78px;padding-top:0}
  .step-num{position:absolute;left:0;top:-2px;margin:0;width:52px;height:52px;background:var(--surface)}
  .feature-row{grid-template-columns:1fr;gap:26px}
  .feature-row.reverse .feature-media{order:0}
  .faq-shell{grid-template-columns:1fr;gap:28px}
  .cta-inner{grid-template-columns:1fr;gap:28px}
  .cta-actions{justify-self:start;max-width:none}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .container{padding:0 16px}
  .header-inner{height:64px}
  .mobile-drawer{inset:64px 0 0 0}
  .hero-actions .btn{width:100%}
  .hero-metrics{gap:16px 28px}
  .metric-num{font-size:22px}
  .steps-wrap{padding:22px 18px}
  .prep-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .site-footer{padding-bottom:32px}
}
@media (max-width:575.98px){
  h1{font-size:clamp(28px,8vw,36px)}
  .hero-float{position:static;width:100%;margin-top:14px}
  .chip{height:36px;font-size:13px;padding:0 13px}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .js .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --ink:#14161A;
  --ink-soft:#2A2D33;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E5E1D8;
  --line-soft:#DCD8CE;
  --muted:#6B6F73;
  --signal:#E8552B;
  --signal-dark:#C8441F;
  --teal:#1F6F63;
  --radius-btn:8px;
  --radius-card:12px;
  --radius-lg:14px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04),0 12px 32px -16px rgba(20,22,26,.12);
  --shadow-card-hover:0 1px 2px rgba(20,22,26,.06),0 20px 44px -20px rgba(20,22,26,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t-fast:140ms;
  --t-mid:220ms;
  --t-slow:320ms;
  --section-gap:clamp(72px,9vw,132px);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-num:"Space Grotesk","DIN Alternate","Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--radius-card)}
a{color:inherit;text-decoration:none;transition:color var(--t-fast) var(--ease)}
a:hover{color:var(--signal)}
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--signal);
  outline-offset:2px;
  border-radius:4px;
}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.container-wide{max-width:1320px}
.section{padding:var(--section-gap) 0}
.section-tight{padding:clamp(52px,6vw,88px) 0}
.eyebrow{
  font-family:var(--font-num);
  font-size:12px;
  font-weight:600;
  letter-spacing:.16em;
  text-transform:uppercase;
  color:var(--muted);
  display:inline-flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:"";
  width:22px;height:1px;background:var(--signal);
}
.section-head{max-width:760px;margin-bottom:clamp(32px,4vw,48px)}
.section-head h2{
  font-size:clamp(28px,3.4vw,44px);
  line-height:1.2;
  margin-top:14px;
}
.section-head p{margin-top:16px;color:var(--muted);font-size:16.5px}

/* ---------- Header ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:var(--paper);
  border-bottom:1px solid var(--line);
  transition:box-shadow var(--t-mid) var(--ease),background var(--t-mid) var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 24px -18px rgba(20,22,26,.55)}
.header-inner{
  display:flex;align-items:center;gap:20px;
  min-height:68px;
}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:8px;background:var(--ink);color:var(--paper);
  display:inline-flex;align-items:center;justify-content:center;
  font-family:var(--font-num);font-size:13px;font-weight:700;letter-spacing:.04em;
}
.brand-text{
  font-size:16px;font-weight:700;letter-spacing:-.01em;color:var(--ink);
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
}
.brand-badge{
  font-size:11px;font-weight:600;letter-spacing:.06em;
  color:var(--teal);border:1px solid rgba(31,111,99,.32);
  background:rgba(31,111,99,.06);
  padding:1px 7px;border-radius:999px;line-height:1.6;
}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:12px}
.main-nav a{
  position:relative;padding:0 17px;line-height:68px;
  font-size:15px;font-weight:500;color:var(--ink-soft);white-space:nowrap;
}
.main-nav a::after{
  content:"";position:absolute;left:17px;right:17px;bottom:16px;height:2px;
  background:var(--signal);transform:scaleX(0);transform-origin:left;
  transition:transform var(--t-mid) var(--ease);
}
.main-nav a:hover{color:var(--ink)}
.main-nav a:hover::after,.main-nav a.active::after{transform:scaleX(1)}
.main-nav a.active{color:var(--ink);font-weight:600}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.command-search{
  position:relative;display:flex;align-items:center;
  width:230px;height:36px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:8px;
  transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);
}
.command-search:focus-within{
  border-color:var(--signal);
  box-shadow:0 0 0 2px rgba(232,85,43,.18);
}
.command-search svg{flex:none;margin-left:11px;color:var(--muted)}
.command-search input{
  flex:1;min-width:0;height:100%;border:0;background:transparent;
  padding:0 8px 0 8px;font-size:13.5px;color:var(--ink);outline:none;
}
.command-search input::placeholder{color:#9A9C9F}
.kbd{
  font-family:var(--font-num);font-size:11px;color:var(--muted);
  border:1px solid var(--line);background:var(--paper);
  border-radius:5px;padding:1px 6px;margin-right:7px;line-height:1.7;
}
.icon-link{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:8px;background:var(--surface);
  color:var(--ink-soft);flex:none;
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.icon-link:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 22px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;
  cursor:pointer;white-space:nowrap;
  transition:transform var(--t-fast) var(--ease),background var(--t-fast) var(--ease),
             color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);
}
.btn-primary{background:var(--signal);color:#fff;box-shadow:0 8px 20px -14px rgba(232,85,43,.9)}
.btn-primary:hover{background:var(--signal-dark);color:#fff;transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(200,68,31,.85)}
.btn-secondary{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-secondary:hover{background:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-ghost-light{background:transparent;color:var(--paper);border-color:rgba(246,244,239,.35)}
.btn-ghost-light:hover{background:rgba(246,244,239,.1);color:var(--paper);border-color:rgba(246,244,239,.6)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--ink);
  padding:0;height:auto;
}
.btn-text svg{transition:transform var(--t-fast) var(--ease)}
.btn-text:hover{color:var(--signal)}
.btn-text:hover svg{transform:translateX(2px)}
.header-cta{height:36px;padding:0 16px;font-size:14px}
.nav-toggle{
  display:none;width:38px;height:38px;border:1px solid var(--line);border-radius:8px;
  background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:16px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);
  transition:transform var(--t-mid) var(--ease);
}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.mobile-drawer{
  display:none;position:fixed;inset:0;z-index:1100;
  background:var(--paper);
  padding:20px 24px 96px;
  overflow-y:auto;
}
.mobile-drawer.is-open{display:block}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{
  width:38px;height:38px;border:1px solid var(--line);border-radius:8px;
  background:var(--surface);font-size:18px;line-height:1;color:var(--ink);cursor:pointer;
}
.drawer-search{margin-bottom:24px}
.drawer-search .command-search{width:100%;height:44px}
.drawer-nav{display:flex;flex-direction:column;border-top:1px solid var(--line)}
.drawer-nav a{
  padding:16px 2px;font-size:19px;font-weight:600;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
}
.drawer-nav a.active{color:var(--signal)}
.drawer-cta{
  position:fixed;left:0;right:0;bottom:0;padding:14px 24px;
  background:var(--paper);border-top:1px solid var(--line);
}
.drawer-cta .btn{width:100%}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;
  padding:clamp(56px,7vw,96px) 0 clamp(44px,5vw,68px);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.page-hero::after{
  content:"";position:absolute;right:-120px;top:-80px;width:520px;height:520px;
  background:radial-gradient(circle,rgba(31,111,99,.10),transparent 68%);
  pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:7fr 5fr;gap:clamp(28px,4vw,64px);align-items:center;
  position:relative;z-index:1;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  height:30px;padding:0 13px;border-radius:999px;
  background:var(--surface);border:1px solid var(--line);
  font-size:12.5px;font-weight:600;color:var(--ink-soft);
}
.hero-badge .dot{width:6px;height:6px;border-radius:50%;background:var(--signal)}
.hero-badge em{font-family:var(--font-num);font-style:normal;color:var(--signal);letter-spacing:.03em}
.page-hero h1{
  font-size:clamp(34px,4.6vw,58px);
  line-height:1.12;
  letter-spacing:-.02em;
  margin-top:22px;
}
.page-hero h1 .accent{color:var(--signal)}
.hero-sub{
  margin-top:20px;max-width:60ch;color:var(--ink-soft);font-size:17px;line-height:1.8;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:18px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
}
.stat-num{
  font-family:var(--font-num);font-size:clamp(24px,3vw,32px);font-weight:600;
  letter-spacing:-.01em;line-height:1.2;color:var(--ink);
}
.stat-label{font-size:13px;color:var(--muted);margin-top:4px;letter-spacing:.02em}
.reveal{opacity:0;transform:translateY(12px);transition:opacity var(--t-slow) var(--ease),transform var(--t-slow) var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border:1px solid var(--line);border-radius:var(--radius-lg);
  box-shadow:var(--shadow-card);
}
.hero-float{
  position:absolute;left:-18px;bottom:-22px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:14px 18px;box-shadow:var(--shadow-card);max-width:250px;
}
.hero-float .fl-title{font-size:12px;letter-spacing:.12em;font-weight:600;color:var(--muted);text-transform:uppercase;font-family:var(--font-num)}
.hero-float .fl-main{font-family:var(--font-num);font-size:20px;font-weight:600;margin-top:4px;color:var(--ink)}
.hero-float .fl-desc{font-size:13px;color:var(--muted);margin-top:2px;line-height:1.65}

/* ---------- Timeline ---------- */
.timeline-wrap{position:relative}
.timeline-wrap::before{
  content:"";position:absolute;left:129px;top:12px;bottom:26px;width:1px;
  background:var(--line);
}
.tl-item{
  position:relative;display:grid;grid-template-columns:110px 1fr;gap:52px;
  padding-bottom:32px;
}
.tl-item:last-child{padding-bottom:0}
.tl-date{
  text-align:right;padding-top:14px;
  font-family:var(--font-num);font-size:14px;font-weight:500;color:var(--muted);
  letter-spacing:.04em;line-height:1.5;
}
.tl-date strong{display:block;font-size:15px;color:var(--ink-soft);font-weight:600}
.tl-dot{
  position:absolute;left:124px;top:19px;width:11px;height:11px;border-radius:50%;
  background:var(--paper);border:2px solid var(--line-soft);
  transition:border-color var(--t-mid) var(--ease),background var(--t-mid) var(--ease);
}
.tl-item.is-latest .tl-dot{
  background:var(--signal);border-color:var(--signal);
  box-shadow:0 0 0 4px rgba(232,85,43,.14);
}
.tl-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:26px 28px;box-shadow:var(--shadow-card);
  transition:transform var(--t-mid) var(--ease),border-color var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease);
}
.tl-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-card-hover)}
.tl-top{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:12px}
.version-tag{
  font-family:var(--font-num);font-size:13px;font-weight:600;letter-spacing:.04em;
  color:var(--ink);background:var(--paper);border:1px solid var(--line);
  border-radius:999px;padding:2px 11px;
}
.tag{
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;
  letter-spacing:.06em;padding:2px 10px;border-radius:999px;line-height:1.8;
}
.tag-teal{color:var(--teal);background:rgba(31,111,99,.08);border:1px solid rgba(31,111,99,.24)}
.tag-orange{color:var(--signal-dark);background:#FDF1EC;border:1px solid rgba(232,85,43,.28)}
.tag-gray{color:var(--muted);background:var(--paper);border:1px solid var(--line)}
.tl-card h3{font-size:20px;line-height:1.4;margin-bottom:10px}
.tl-card p{color:var(--ink-soft);font-size:15.5px;line-height:1.8}
.tl-list{margin-top:14px;display:grid;gap:8px}
.tl-list li{
  position:relative;padding-left:20px;font-size:15px;color:var(--ink-soft);line-height:1.75;
}
.tl-list li::before{
  content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;
  border-radius:50%;background:var(--line-soft);
}
.tl-list li.is-new::before{background:var(--signal)}
.tl-meta{
  margin-top:18px;padding-top:14px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:8px 22px;font-size:13px;color:var(--muted);
}
.tl-meta span b{font-weight:600;color:var(--ink-soft);font-family:var(--font-num);letter-spacing:.02em}

/* ---------- Update types ---------- */
.split{display:grid;grid-template-columns:5fr 7fr;gap:clamp(28px,4vw,64px);align-items:start}
.split h2{font-size:clamp(26px,3.2vw,40px);line-height:1.22;margin-top:14px}
.split p.lead{margin-top:18px;color:var(--muted);font-size:16.5px}
.type-list{display:grid;gap:0;border-top:1px solid var(--line)}
.type-item{
  display:grid;grid-template-columns:44px 1fr;gap:18px;
  padding:22px 4px;border-bottom:1px solid var(--line);
  transition:background var(--t-fast) var(--ease);
}
.type-item:hover{background:#FBFAF6}
.type-idx{
  font-family:var(--font-num);font-size:16px;font-weight:600;color:var(--teal);
  padding-top:2px;letter-spacing:.04em;
}
.type-item h3{font-size:17px;margin-bottom:6px}
.type-item p{font-size:15px;color:var(--muted);line-height:1.8}
.figure-block{margin-top:34px}
.figure-block img{width:100%;aspect-ratio:16/10;object-fit:cover;border:1px solid var(--line)}
.figure-block figcaption{font-size:13px;color:var(--muted);margin-top:10px;line-height:1.7}

/* ---------- Cross links ---------- */
.cross{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:clamp(32px,4vw,48px) 0;background:var(--surface);
}
.cross-head{display:flex;flex-wrap:wrap;align-items:baseline;gap:14px;margin-bottom:20px}
.cross-head h2{font-size:20px}
.cross-head span{font-size:14px;color:var(--muted)}
.cross-tags{display:flex;flex-wrap:wrap;gap:10px}
.cross-tags a{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;border:1px solid var(--line);
  background:var(--paper);font-size:14.5px;font-weight:500;color:var(--ink-soft);
  transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),
             background var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);
}
.cross-tags a:hover{
  border-color:var(--signal);color:var(--signal);background:#FDF1EC;transform:translateY(-1px);
}
.cross-tags a svg{opacity:.55}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:clamp(28px,4vw,60px);align-items:start}
.faq-intro h2{font-size:clamp(26px,3.2vw,40px);line-height:1.22;margin-top:14px}
.faq-intro p{margin-top:16px;color:var(--muted);font-size:16px}
.accordion-item{
  background:transparent;border:0;border-top:1px solid var(--line);
}
.accordion-item:last-child{border-bottom:1px solid var(--line)}
.accordion-button{
  background:transparent;box-shadow:none;padding:22px 44px 22px 0;
  font-size:17px;font-weight:600;color:var(--ink);line-height:1.6;
}
.accordion-button:not(.collapsed){background:transparent;color:var(--signal);box-shadow:none}
.accordion-button:focus{box-shadow:none;border-color:transparent;outline:2px solid var(--signal);outline-offset:-2px}
.accordion-button::after{
  background-image:none;
  width:16px;height:16px;position:absolute;right:6px;
  content:"";
  border-right:2px solid currentColor;border-bottom:2px solid currentColor;
  transform:rotate(45deg) translateY(-3px);
  transition:transform var(--t-mid) var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(225deg) translateY(-3px)}
.accordion-body{padding:0 44px 24px 0;font-size:15.5px;line-height:1.85;color:var(--ink-soft);max-width:68ch}

/* ---------- CTA ---------- */
.cta-band{background:var(--ink);color:var(--paper);border-radius:var(--radius-lg);padding:clamp(34px,4.4vw,60px)}
.cta-inner{display:grid;grid-template-columns:7fr 5fr;gap:clamp(26px,4vw,56px);align-items:center}
.cta-band h2{font-size:clamp(26px,3.2vw,38px);line-height:1.25;color:var(--paper)}
.cta-band p.lead{color:#A9ADA8;margin-top:14px;font-size:16px;line-height:1.8}
.cta-points{margin-top:22px;display:grid;gap:9px}
.cta-points li{display:flex;gap:10px;font-size:15px;color:#D7D5CE;line-height:1.7}
.cta-points li::before{content:"—";color:var(--signal);flex:none}
.cta-panel{
  background:rgba(246,244,239,.05);
  border:1px solid rgba(246,244,239,.14);
  border-radius:var(--radius-card);padding:24px;
}
.cta-panel .panel-label{font-family:var(--font-num);font-size:12px;letter-spacing:.14em;text-transform:uppercase;color:#A9ADA8}
.period-group{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0 18px}
.period-btn{
  border:1px solid rgba(246,244,239,.2);background:transparent;color:var(--paper);
  border-radius:8px;padding:10px 4px;font-size:14px;font-weight:600;cursor:pointer;
  transition:background var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease);
}
.period-btn:hover{border-color:rgba(246,244,239,.45)}
.period-btn.is-active{background:var(--signal);border-color:var(--signal);color:#fff}
.cta-panel .btn{width:100%}
.cta-note{font-size:12.5px;color:#A9ADA8;margin-top:12px;line-height:1.7}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:var(--paper);padding:clamp(56px,7vw,88px) 0 0;margin-top:var(--section-gap)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:clamp(26px,4vw,56px)}
.footer-brand .brand{margin-bottom:18px}
.footer-brand .brand-mark{background:var(--paper);color:var(--ink)}
.footer-brand .brand-text{color:var(--paper)}
.footer-brand .brand-badge{color:#8FC9BE;border-color:rgba(143,201,190,.35);background:rgba(143,201,190,.08)}
.footer-brand p{font-size:14.5px;line-height:1.85;color:#A9ADA8;max-width:38ch}
.footer-col h3{
  font-family:var(--font-num);font-size:13px;font-weight:600;letter-spacing:.14em;
  text-transform:uppercase;color:#8C908B;margin-bottom:18px;
}
.footer-col ul{display:grid;gap:11px}
.footer-col li{font-size:14.5px;color:#A9ADA8;line-height:1.7}
.footer-col a{color:#D7D5CE}
.footer-col a:hover{color:var(--signal)}
.footer-bottom{
  margin-top:clamp(38px,5vw,60px);padding:22px 0 26px;
  border-top:1px solid rgba(246,244,239,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13.5px;color:#8C908B;
}

/* ---------- Responsive ---------- */
@media (max-width:1199.98px){
  .command-search{width:190px}
  .main-nav a{padding:0 13px}
  .main-nav a::after{left:13px;right:13px}
}
@media (max-width:991.98px){
  .main-nav,.command-search,.icon-link,.header-cta{display:none}
  .nav-toggle{display:flex}
  .header-inner{justify-content:space-between}
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-media{max-width:520px}
  .hero-float{left:auto;right:12px;bottom:-18px}
  .split{grid-template-columns:1fr;gap:32px}
  .faq-grid{grid-template-columns:1fr;gap:26px}
  .cta-inner{grid-template-columns:1fr;gap:30px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .footer-brand{grid-column:1/-1}
  .timeline-wrap::before{left:9px}
  .tl-item{grid-template-columns:1fr;gap:10px;padding-left:34px;padding-bottom:26px}
  .tl-date{text-align:left;padding-top:0}
  .tl-date strong{display:inline}
  .tl-dot{left:4px;top:8px}
  .tl-card{padding:22px}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .container{padding:0 18px}
  .hero-stats{grid-template-columns:1fr 1fr;gap:16px 14px}
  .hero-float{position:static;margin-top:14px;max-width:none}
  .hero-actions .btn{width:100%}
  .cta-band{padding:26px 20px;border-radius:var(--radius-card)}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:6px}
  .section{padding:clamp(56px,12vw,88px) 0}
}
@media (max-width:519.98px){
  .hero-stats{grid-template-columns:1fr}
  .period-group{grid-template-columns:1fr}
  .cross-tags a{padding:8px 14px;font-size:14px}
  .tl-card{padding:18px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
  .reveal{opacity:1;transform:none}
}

/* roulang page: category5 */
:root{
  --ink:#14161A;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --line:#E5E1D8;
  --line-soft:#DCD8CE;
  --muted:#6B6F73;
  --signal:#E8552B;
  --signal-deep:#C8441F;
  --teal:#1F6F63;
  --radius-btn:8px;
  --radius-card:12px;
  --radius-media:14px;
  --shadow-card:0 1px 2px rgba(20,22,26,.04), 0 12px 32px -16px rgba(20,22,26,.12);
  --shadow-card-hover:0 2px 4px rgba(20,22,26,.06), 0 20px 44px -18px rgba(20,22,26,.22);
  --ease:cubic-bezier(.2,.7,.3,1);
  --t-fast:140ms;
  --t-mid:220ms;
  --t-slow:320ms;
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --font-num:"Space Grotesk","DIN Alternate","Helvetica Neue",Arial,sans-serif;
  --nav-h:68px;
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--font-cn);
  font-size:16.5px;
  line-height:1.85;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color var(--t-fast) var(--ease);}
a:hover{color:var(--signal);}
button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--signal);outline-offset:2px;}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.container-wide{max-width:1320px;}
.section{padding:clamp(72px,9vw,132px) 0;}
.section-tight{padding:clamp(52px,6vw,88px) 0;}
.eyebrow{
  display:inline-block;
  font-family:var(--font-num);
  font-size:12px;
  font-weight:600;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--teal);
}
.h2{font-size:clamp(28px,3.4vw,44px);line-height:1.2;font-weight:700;letter-spacing:-.01em;}
.h3{font-size:22px;line-height:1.4;font-weight:600;}
.lead{color:var(--muted);font-size:17px;}
.section-head{max-width:720px;margin-bottom:clamp(28px,4vw,40px);}
.section-head .h2{margin-top:12px;}

/* buttons */
.btn-pg,
.btn-ghost,
.btn-text{display:inline-flex;align-items:center;justify-content:center;gap:10px;font-weight:600;border-radius:var(--radius-btn);transition:transform var(--t-fast) var(--ease),background-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease);}
.btn-pg{background:var(--signal);color:#fff;border:1px solid var(--signal);height:48px;padding:0 26px;font-size:16px;box-shadow:0 1px 2px rgba(232,85,43,.16);}
.btn-pg:hover{background:var(--signal-deep);border-color:var(--signal-deep);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px -12px rgba(200,68,31,.7);}
.btn-pg:active{transform:translateY(0);}
.btn-ghost{background:transparent;border:1px solid var(--ink);color:var(--ink);height:48px;padding:0 24px;font-size:16px;}
.btn-ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink);transform:translateY(-1px);}
.btn-text{background:none;border:none;padding:0;color:var(--ink);font-size:15px;height:auto;}
.btn-text i{transition:transform var(--t-fast) var(--ease);}
.btn-text:hover i{transform:translateX(3px);}
.btn-sm{height:40px;padding:0 18px;font-size:15px;}

/* header / nav */
.site-header{position:sticky;top:0;z-index:1030;background:var(--paper);border-bottom:1px solid var(--line);transition:box-shadow var(--t-mid) var(--ease);}
.site-header.is-scrolled{box-shadow:0 6px 24px -18px rgba(20,22,26,.5);}
.nav-wrap{display:flex;align-items:center;gap:20px;height:var(--nav-h);}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{width:34px;height:34px;border-radius:8px;background:var(--ink);color:var(--paper);display:inline-flex;align-items:center;justify-content:center;font-family:var(--font-num);font-size:14px;font-weight:700;letter-spacing:.02em;}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.01em;display:inline-flex;align-items:center;gap:8px;white-space:nowrap;}
.brand-badge{font-size:11px;font-weight:600;letter-spacing:.08em;color:var(--teal);border:1px solid rgba(31,111,99,.32);border-radius:999px;padding:1px 7px;line-height:1.5;}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px;flex-wrap:nowrap;}
.main-nav a{position:relative;display:inline-block;padding:8px 17px;font-size:15.5px;color:var(--ink);border-radius:6px;white-space:nowrap;}
.main-nav a::after{content:"";position:absolute;left:17px;right:17px;bottom:2px;height:1.5px;background:var(--signal);transform:scaleX(0);transform-origin:left;transition:transform var(--t-mid) var(--ease);}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after{transform:scaleX(1);}
.main-nav a.active{color:var(--signal);font-weight:600;}
.main-nav a.active::after{transform:scaleX(1);}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto;}
.command-search{position:relative;display:flex;align-items:center;}
.command-search input{height:36px;width:210px;border:1px solid var(--line-soft);background:#FBFAF6;border-radius:8px;padding:0 52px 0 34px;font-size:14px;transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease),background var(--t-fast) var(--ease);}
.command-search input::placeholder{color:#9A9E9F;}
.command-search input:focus{outline:none;background:#fff;border-color:var(--signal);box-shadow:0 0 0 2px rgba(232,85,43,.16);}
.command-search .cs-icon{position:absolute;left:12px;font-size:13px;color:var(--muted);pointer-events:none;}
.command-search .cs-key{position:absolute;right:8px;font-family:var(--font-num);font-size:11px;color:var(--muted);border:1px solid var(--line-soft);background:#fff;border-radius:999px;padding:1px 7px;line-height:1.6;pointer-events:none;}
.icon-btn{width:36px;height:36px;border:1px solid var(--line-soft);border-radius:8px;background:transparent;display:inline-flex;align-items:center;justify-content:center;color:var(--ink);transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),background var(--t-fast) var(--ease);}
.icon-btn:hover{border-color:var(--signal);color:var(--signal);background:#fff;}
.nav-cta{height:38px;padding:0 18px;font-size:15px;}
.nav-toggle{display:none;width:38px;height:38px;border:1px solid var(--line-soft);border-radius:8px;background:transparent;align-items:center;justify-content:center;font-size:16px;}
.drawer{position:fixed;inset:0;z-index:1040;background:var(--paper);display:none;flex-direction:column;padding:20px 20px 0;}
.drawer.open{display:flex;}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{font-size:20px;font-weight:600;padding:14px 4px;border-bottom:1px solid var(--line);}
.drawer-nav a.active{color:var(--signal);}
.drawer-bottom{margin-top:auto;padding:20px 0 24px;position:sticky;bottom:0;background:var(--paper);}
.drawer-bottom .btn-pg{width:100%;}
.drawer .command-search{margin-bottom:18px;}
.drawer .command-search input{width:100%;height:44px;}

/* hero */
.page-hero{position:relative;color:var(--paper);background-color:var(--ink);background-image:url("/assets/images/backpic/back-2.png");background-size:cover;background-position:center;overflow:hidden;}
.page-hero::before{content:"";position:absolute;inset:0;background:linear-gradient(105deg,rgba(20,22,26,.94) 0%,rgba(20,22,26,.86) 46%,rgba(20,22,26,.66) 100%);}
.page-hero .container{position:relative;z-index:1;padding-top:clamp(56px,7vw,96px);padding-bottom:clamp(48px,6vw,80px);}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:#A9ADA8;margin-bottom:22px;font-family:var(--font-num);}
.crumbs a{color:#A9ADA8;}
.crumbs a:hover{color:var(--signal);}
.crumbs span.sep{opacity:.5;}
.hero-tag{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-num);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#F6F4EF;border:1px solid rgba(246,244,239,.28);border-radius:999px;padding:5px 14px;}
.hero-tag .dot{width:6px;height:6px;border-radius:50%;background:var(--signal);}
.page-hero h1{font-size:clamp(34px,4.6vw,58px);line-height:1.1;font-weight:700;letter-spacing:-.02em;margin:22px 0 18px;max-width:16em;}
.page-hero h1 em{font-style:normal;color:var(--signal);}
.page-hero p{max-width:640px;color:#D6D4CE;font-size:17px;line-height:1.8;}
.hero-meta{display:flex;flex-wrap:wrap;gap:10px 28px;margin-top:28px;font-size:14px;color:#A9ADA8;}
.hero-meta .mono{font-family:var(--font-num);color:#F6F4EF;font-weight:500;}

/* search block */
.search-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-media);box-shadow:var(--shadow-card);padding:clamp(22px,3vw,32px);}
.search-panel .sp-title{font-size:17px;font-weight:600;margin-bottom:14px;}
.search-form{display:flex;gap:12px;flex-wrap:wrap;}
.search-field{position:relative;flex:1 1 320px;min-width:0;}
.search-field i{position:absolute;left:16px;top:50%;transform:translateY(-50%);color:var(--muted);font-size:14px;}
.search-field input{width:100%;height:48px;border:1px solid var(--line-soft);border-radius:var(--radius-btn);background:#FBFAF6;padding:0 16px 0 42px;font-size:15.5px;transition:border-color var(--t-fast) var(--ease),box-shadow var(--t-fast) var(--ease),background var(--t-fast) var(--ease);}
.search-field input::placeholder{color:#9A9E9F;}
.search-field input:focus{outline:none;background:#fff;border-color:var(--signal);box-shadow:0 0 0 2px rgba(232,85,43,.14);}
.hot-terms{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;font-size:14px;color:var(--muted);}
.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line-soft);background:#fff;border-radius:999px;padding:5px 14px;font-size:13.5px;color:var(--ink);transition:border-color var(--t-fast) var(--ease),color var(--t-fast) var(--ease),background var(--t-fast) var(--ease),transform var(--t-fast) var(--ease);}
.chip:hover{border-color:var(--signal);color:var(--signal);transform:translateY(-1px);}

/* faq */
.faq-group-title{display:flex;align-items:center;gap:12px;font-size:15px;font-weight:600;letter-spacing:.02em;margin-bottom:18px;color:var(--ink);}
.faq-group-title .idx{font-family:var(--font-num);font-size:12px;color:var(--teal);border:1px solid rgba(31,111,99,.3);border-radius:999px;padding:2px 9px;letter-spacing:.08em;}
.faq-col{display:flex;flex-direction:column;gap:clamp(28px,3.5vw,40px);}
.accordion-pg .accordion-item{border:none;border-top:1px solid var(--line);background:transparent;border-radius:0;}
.accordion-pg .accordion-item:last-child{border-bottom:1px solid var(--line);}
.accordion-pg .accordion-button{background:transparent;border:none;border-radius:0;box-shadow:none;font-size:17px;font-weight:600;color:var(--ink);padding:20px 40px 20px 0;line-height:1.55;transition:color var(--t-fast) var(--ease);}
.accordion-pg .accordion-button:not(.collapsed){color:var(--signal);background:transparent;box-shadow:none;}
.accordion-pg .accordion-button:hover{color:var(--signal);}
.accordion-pg .accordion-button:focus{box-shadow:none;outline:2px solid var(--signal);outline-offset:2px;}
.accordion-pg .accordion-button::after{display:none;}
.accordion-pg .accordion-button .plus{position:absolute;right:4px;top:50%;transform:translateY(-50%);font-size:14px;color:var(--muted);transition:transform var(--t-mid) var(--ease),color var(--t-fast) var(--ease);}
.accordion-pg .accordion-button:not(.collapsed) .plus{transform:translateY(-50%) rotate(45deg);color:var(--signal);}
.accordion-pg .accordion-body{padding:0 40px 24px 0;font-size:15.5px;line-height:1.85;color:#3C4045;max-width:68ch;}
.accordion-pg .accordion-body a{text-decoration:underline;text-underline-offset:4px;text-decoration-color:rgba(232,85,43,.5);}
.accordion-pg .accordion-body a:hover{color:var(--signal);text-decoration-color:var(--signal);}

/* related links */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.link-card{display:flex;flex-direction:column;gap:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;box-shadow:var(--shadow-card);transition:transform var(--t-mid) var(--ease),border-color var(--t-mid) var(--ease),box-shadow var(--t-mid) var(--ease);height:100%;}
.link-card:hover{transform:translateY(-2px);border-color:var(--signal);box-shadow:var(--shadow-card-hover);color:var(--ink);}
.link-card .lc-top{display:flex;align-items:center;justify-content:space-between;}
.link-card .num{font-family:var(--font-num);font-size:13px;color:var(--teal);letter-spacing:.1em;}
.link-card h3{font-size:19px;font-weight:600;line-height:1.4;}
.link-card p{font-size:14.5px;color:var(--muted);line-height:1.8;flex:1;}
.link-card .lc-arrow{font-size:14px;color:var(--signal);display:inline-flex;align-items:center;gap:8px;font-weight:600;}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;}

/* self-check list */
.check-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 28px;}
.check-item{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:#3C4045;line-height:1.8;}
.check-item i{color:var(--teal);font-size:13px;margin-top:7px;}
.check-item b{font-weight:600;color:var(--ink);}

/* CTA */
.cta-band{background:var(--ink);color:var(--paper);border-radius:var(--radius-media); padding:clamp(32px,4.5vw,56px);display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;position:relative;overflow:hidden;}
.cta-band::after{content:"";position:absolute;right:-60px;bottom:-90px;width:280px;height:280px;border-radius:50%;border:1px solid rgba(246,244,239,.14);}
.cta-band h2{font-size:clamp(24px,2.8vw,34px);line-height:1.25;font-weight:700;letter-spacing:-.01em;max-width:20em;}
.cta-band p{color:#A9ADA8;margin-top:12px;font-size:15.5px;max-width:36em;}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;position:relative;z-index:1;}
.cta-band .btn-ghost{border-color:rgba(246,244,239,.5);color:var(--paper);}
.cta-band .btn-ghost:hover{background:var(--paper);color:var(--ink);border-color:var(--paper);}

/* footer */
.site-footer{background:var(--ink);color:var(--paper);margin-top:clamp(72px,9vw,120px);padding:clamp(52px,6vw,80px) 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px 32px;}
.footer-brand .brand{margin-bottom:18px;}
.footer-brand .brand-mark{background:var(--paper);color:var(--ink);}
.footer-brand .brand-badge{color:#B9BDB6;border-color:rgba(246,244,239,.28);}
.footer-brand p{color:#A9ADA8;font-size:14.5px;line-height:1.85;max-width:34em;}
.footer-col h3{font-size:13px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:#8F938F;margin-bottom:16px;}
.footer-col ul{display:flex;flex-direction:column;gap:11px;}
.footer-col li{font-size:14.5px;color:#C7CAC4;line-height:1.7;}
.footer-col a{color:#C7CAC4;}
.footer-col a:hover{color:var(--signal);}
.footer-bottom{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:clamp(36px,5vw,56px);padding-top:22px;border-top:1px solid rgba(246,244,239,.12);font-size:13.5px;color:#8F938F;font-family:var(--font-num);}

/* reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity var(--t-slow) var(--ease),transform var(--t-slow) var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* responsive */
@media (max-width:1199.98px){
  .main-nav a{padding:8px 12px;font-size:15px;}
  .command-search input{width:170px;}
}
@media (max-width:991.98px){
  .main-nav{display:none;}
  .command-search{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-cta{display:none;}
  .nav-wrap{height:64px;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .check-list{grid-template-columns:1fr;}
}
@media (max-width:767.98px){
  body{font-size:16px;}
  .page-hero h1{max-width:none;}
  .related-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .search-form .btn-pg{width:100%;}
  .cta-actions{width:100%;}
  .cta-actions .btn-pg,.cta-actions .btn-ghost{width:100%;}
  .footer-bottom{flex-direction:column;gap:8px;}
}
@media (max-width:575.98px){
  .container{padding:0 16px;}
  .section{padding:56px 0;}
  .accordion-pg .accordion-button{font-size:16px;padding-right:32px;}
  .accordion-pg .accordion-body{padding-right:12px;}
  .hero-meta{gap:8px 18px;font-size:13.5px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}