/* roulang page: index */
/* ========== 设计变量 ========== */
:root{
  --ink:#15171A;
  --ink-deep:#0C0E10;
  --paper:#F5F3EE;
  --paper-alt:#EFEDE7;
  --white:#FFFFFF;
  --lime:#C7F03C;
  --lime-hi:#D6F86B;
  --copper:#C9631F;
  --text:#3A3F45;
  --muted:#7B8086;
  --line:#E4E0D7;
  --card-line:#E8E4DA;
  --tier-1:#8A8F96;
  --tier-2:#4E8C7A;
  --tier-3:#C9631F;
  --tier-4:#15171A;
  --r-btn:10px;
  --r-card:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(21,23,26,.04);
  --sh-2:0 10px 24px rgba(21,23,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
}

/* ========== 基础重置 ========== */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',system-ui,-apple-system,sans-serif;
  background:var(--paper);
  color:var(--text);
  font-size:17px;
  line-height:1.85;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease);}
button{font-family:inherit;}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:800;line-height:1.22;letter-spacing:-.01em;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}
::selection{background:var(--lime);color:var(--ink);}

/* ========== 容器 ========== */
.shell{width:100%;max-width:1280px;margin:0 auto;padding-left:24px;padding-right:24px;}
@media (max-width:1399.98px){.shell{max-width:1140px;}}
@media (max-width:1199.98px){.shell{max-width:960px;}}
@media (max-width:991.98px){.shell{max-width:none;padding-left:24px;padding-right:24px;}}
@media (max-width:575.98px){.shell{padding-left:16px;padding-right:16px;}}

/* ========== 通用元素 ========== */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.16em;color:var(--muted);
  text-transform:uppercase;margin-bottom:20px;
}
.eyebrow::before{content:'';width:22px;height:2px;background:var(--lime);display:inline-block;}
.sec{padding:104px 0;}
.sec-tight{padding:80px 0;}
.sec-alt{background:var(--paper-alt);}
@media (max-width:991.98px){.sec{padding:76px 0;}.sec-tight{padding:60px 0;}}
@media (max-width:767.98px){.sec{padding:56px 0;}.sec-tight{padding:48px 0;}}

.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px;}
.sec-head h2{font-size:clamp(28px,2.8vw,40px);}
.sec-head .sec-desc{margin-top:12px;color:var(--muted);font-size:15px;max-width:560px;}
.sec-link{font-size:14px;color:var(--ink);font-weight:700;white-space:nowrap;position:relative;padding-bottom:3px;}
.sec-link::after{content:'';position:absolute;left:0;bottom:0;height:1px;width:100%;background:var(--ink);transform-origin:left;transition:transform .2s var(--ease);}
.sec-link:hover{color:var(--copper);}
.sec-link:hover::after{background:var(--copper);}
@media (max-width:767.98px){
  .sec-head{flex-direction:column;align-items:flex-start;gap:16px;margin-bottom:32px;}
}

/* ========== 按钮 ========== */
.btn-x{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:700;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.btn-solid{background:var(--ink);color:#fff;}
.btn-solid:hover{background:var(--ink-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:var(--lime-hi);color:var(--ink);transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-2px);}
.btn-ghost-light{background:transparent;border-color:rgba(245,243,238,.55);color:var(--paper);}
.btn-ghost-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper);transform:translateY(-2px);}
.btn-sm{height:42px;padding:0 18px;font-size:14px;}

/* ========== 导航 ========== */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:var(--paper);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(245,243,238,.92);
  -webkit-backdrop-filter:saturate(150%) blur(10px);
  backdrop-filter:saturate(150%) blur(10px);
  border-bottom-color:var(--line);
}
.nav-inner{position:relative;display:flex;align-items:center;justify-content:space-between;height:76px;}
.nav-side{display:flex;align-items:center;gap:26px;}
.nav-right{gap:22px;}
.nav-a{position:relative;font-size:15px;color:var(--text);padding:6px 0;white-space:nowrap;}
.nav-a::after{
  content:'';position:absolute;left:0;bottom:0;height:2px;width:100%;
  background:var(--ink);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-a:hover{color:var(--ink);}
.nav-a:hover::after{transform:scaleX(1);}
.nav-a.active{color:var(--ink);font-weight:700;}
.nav-a.active::after{transform:scaleX(1);}
.nav-brand{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;align-items:center;gap:10px;}
.brand-mark{display:inline-flex;flex:0 0 auto;}
.brand-text{display:flex;flex-direction:column;line-height:1.05;}
.brand-text b{font-size:16px;font-weight:800;letter-spacing:.02em;color:var(--ink);}
.brand-text i{font-style:normal;font-size:10.5px;letter-spacing:.2em;color:var(--muted);margin-top:3px;}
.nav-cta{height:42px;padding:0 20px;font-size:14px;}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:#fff;padding:0;flex-direction:column;align-items:center;justify-content:center;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:17px;height:2px;background:var(--ink);border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease);}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.drawer{
  position:fixed;left:0;right:0;top:64px;bottom:0;background:var(--paper);
  transform:translateY(-8px);opacity:0;visibility:hidden;overflow-y:auto;
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
  border-top:1px solid var(--line);z-index:1029;
}
.drawer.open{opacity:1;visibility:visible;transform:translateY(0);}
.drawer-inner{padding:24px 24px 56px;}
.drawer-link{
  display:flex;align-items:baseline;gap:16px;
  font-size:22px;font-weight:700;color:var(--ink);
  padding:20px 0;border-bottom:1px solid var(--line);
}
.drawer-link span{font-size:12px;letter-spacing:.14em;color:var(--muted);font-weight:600;}
.drawer-link.active{color:var(--copper);}
.drawer-cta{margin-top:28px;display:flex;flex-direction:column;gap:12px;}

@media (max-width:991.98px){
  .nav-inner{height:64px;justify-content:space-between;}
  .nav-left,.nav-right{display:none;}
  .nav-toggle{display:flex;}
  .nav-brand{position:static;transform:none;left:auto;top:auto;}
  .mobile-cta{display:inline-flex;height:38px;padding:0 16px;font-size:13px;}
}
@media (min-width:992px){
  .mobile-cta{display:none;}
  .drawer{display:none;}
}

/* ========== 首屏 ========== */
.hero{padding:76px 0 84px;position:relative;overflow:hidden;}
.hero::before{
  content:'';position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(21,23,26,.035) 1px,transparent 1px) 0 0/96px 96px,
    linear-gradient(rgba(21,23,26,.035) 1px,transparent 1px) 0 0/96px 96px;
  -webkit-mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 78%);
  mask-image:linear-gradient(to bottom,rgba(0,0,0,.7),transparent 78%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero h1{font-size:clamp(36px,4.2vw,60px);font-weight:800;line-height:1.12;letter-spacing:-.02em;}
.hero h1 em{font-style:normal;position:relative;white-space:nowrap;}
.hero h1 em::after{
  content:'';position:absolute;left:0;right:0;bottom:6px;height:10px;
  background:var(--lime);opacity:.55;z-index:-1;
}
.hero-sub{margin-top:22px;font-size:17px;color:var(--text);max-width:520px;}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px;}
.hero-meta{margin-top:36px;display:flex;flex-wrap:wrap;gap:10px 22px;font-size:13px;color:var(--muted);}
.hero-meta li{display:flex;align-items:center;gap:8px;}
.hero-meta li::before{content:'';width:6px;height:6px;background:var(--copper);border-radius:1px;display:inline-block;}

.hero-visual{position:relative;}
.hero-figure{
  position:relative;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--card-line);background:var(--ink);
  box-shadow:var(--sh-1);
}
.hero-figure img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .4s var(--ease);}
.hero-figure:hover img{transform:scale(1.03);}
.hero-figure::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,14,16,0) 45%,rgba(12,14,16,.62) 100%);
}
.hero-figure figcaption{
  position:absolute;left:20px;right:20px;bottom:18px;z-index:2;
  color:var(--paper);font-size:13px;line-height:1.6;
}
.hero-figure figcaption b{display:block;font-size:16px;color:#fff;font-weight:700;margin-bottom:2px;}

.gauges{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:18px;background:var(--line);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;}
.gauge{background:#fff;padding:18px 16px;}
.gauge b{display:block;font-size:34px;font-weight:800;color:var(--ink);letter-spacing:-.02em;line-height:1.1;}
.gauge b i{font-style:normal;font-size:14px;font-weight:600;color:var(--muted);margin-left:2px;}
.gauge span{display:block;margin-top:6px;font-size:12.5px;color:var(--muted);letter-spacing:.04em;}

@media (max-width:991.98px){
  .hero{padding:52px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-sub{max-width:none;}
}
@media (max-width:575.98px){
  .hero h1{font-size:clamp(30px,8.4vw,36px);}
  .hero-cta .btn-x{width:100%;}
  .gauges{grid-template-columns:1fr;}
}

/* ========== 权益对照表 ========== */
.table-wrap{
  border:1px solid var(--card-line);border-radius:var(--r-card);background:#fff;
  overflow:auto;box-shadow:var(--sh-1);
  -webkit-overflow-scrolling:touch;
}
.compare{min-width:820px;font-size:15px;}
.compare thead th{
  position:sticky;top:0;z-index:3;background:#fff;
  font-size:13px;letter-spacing:.08em;color:var(--muted);font-weight:600;
  text-align:left;padding:18px 20px;white-space:nowrap;
  border-bottom:1px solid var(--line);
}
.compare thead th:first-child{color:var(--muted);}
.compare thead th .tier-name{display:block;font-size:16px;font-weight:800;letter-spacing:0;color:var(--ink);margin-bottom:2px;}
.compare thead th .reco{
  display:inline-block;margin-top:6px;font-size:11px;letter-spacing:.1em;
  background:var(--lime);color:var(--ink);border-radius:var(--r-pill);padding:2px 10px;font-weight:700;
}
.compare tbody th{
  text-align:left;font-weight:600;color:var(--ink);font-size:15px;
  padding:18px 20px;border-bottom:1px solid var(--line);background:#fff;
}
.compare tbody td{
  padding:18px 20px;border-bottom:1px solid var(--line);color:var(--text);font-size:14.5px;
}
.compare tbody tr:last-child th,.compare tbody tr:last-child td{border-bottom:none;}
.compare tbody tr:hover th,.compare tbody tr:hover td{background:var(--paper);}
.compare .col-reco{background:#FAFDF0;}
.compare tbody tr:hover .col-reco{background:#F3FADF;}
.compare thead th.col-reco{box-shadow:inset 1px 0 0 var(--lime),inset -1px 0 0 var(--lime);}
.compare tbody td.col-reco{box-shadow:inset 1px 0 0 var(--lime),inset -1px 0 0 var(--lime);}
.compare tbody tr:last-child td.col-reco{box-shadow:inset 1px 0 0 var(--lime),inset -1px 0 0 var(--lime),inset 0 -1px 0 var(--lime);}
.mark-yes{color:var(--ink);font-weight:700;}
.mark-no{color:var(--muted);}

@media (max-width:767.98px){
  .table-wrap{border:none;background:transparent;box-shadow:none;overflow:visible;}
  .compare{min-width:0;display:block;font-size:15px;}
  .compare thead{display:none;}
  .compare tbody{display:block;}
  .compare tbody tr{
    display:block;background:#fff;border:1px solid var(--card-line);
    border-radius:var(--r-card);padding:8px 16px 12px;margin-bottom:14px;box-shadow:var(--sh-1);
  }
  .compare tbody tr:hover th,.compare tbody tr:hover td{background:transparent;}
  .compare tbody th{
    display:block;padding:12px 0 10px;font-size:15px;
    border-bottom:1px solid var(--line);background:transparent;
  }
  .compare tbody td{
    display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
    padding:9px 0;border-bottom:none;background:transparent!important;box-shadow:none!important;
    font-size:14px;
  }
  .compare tbody td::before{
    content:attr(data-label);color:var(--muted);font-size:13px;flex:0 0 auto;
  }
  .compare tbody td.col-reco{color:var(--ink);font-weight:700;}
}

/* ========== 等级亮点 ========== */
.levels-grid{display:grid;grid-template-columns:1fr 2.2fr;gap:56px;align-items:start;}
.ruler{position:sticky;top:120px;}
.ruler-cap{font-size:12px;letter-spacing:.16em;color:var(--muted);margin-bottom:22px;}
.ruler-list{position:relative;padding-left:22px;}
.ruler-list::before{content:'';position:absolute;left:5px;top:6px;bottom:6px;width:1px;background:var(--line);}
.ruler-list li{position:relative;padding:14px 0;font-size:15px;color:var(--muted);font-weight:600;display:flex;gap:12px;align-items:baseline;}
.ruler-list li::before{
  content:'';position:absolute;left:-22px;top:22px;width:11px;height:11px;border-radius:50%;
  background:var(--paper);border:2px solid var(--line);
}
.ruler-list li.num{font-size:12px;letter-spacing:.14em;color:var(--muted);font-weight:600;}
.ruler-list li.t1::before{border-color:var(--tier-1);}
.ruler-list li.t2::before{border-color:var(--tier-2);}
.ruler-list li.t3::before{border-color:var(--tier-3);}
.ruler-list li.t4::before{border-color:var(--tier-4);background:var(--lime);}
.ruler-list li b{color:var(--ink);font-weight:700;font-size:15px;}

.level-list{display:flex;flex-direction:column;gap:0;}
.level-item{
  padding:34px 0;border-top:1px solid var(--line);
}
.level-item:last-child{border-bottom:1px solid var(--line);}
.level-top{display:flex;align-items:center;gap:14px;flex-wrap:wrap;}
.level-no{font-size:13px;letter-spacing:.14em;color:var(--muted);font-weight:600;}
.level-name{font-size:24px;font-weight:800;color:var(--ink);}
.badge-tier{
  display:inline-flex;align-items:center;height:24px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.06em;color:#fff;background:var(--tier-1);
}
.badge-tier.t2{background:var(--tier-2);}
.badge-tier.t3{background:var(--tier-3);}
.badge-tier.t4{background:var(--tier-4);box-shadow:inset 0 0 0 1px var(--lime);color:var(--lime);}
.level-value{margin-top:14px;font-size:17px;color:var(--ink);font-weight:600;}
.level-points{margin-top:16px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.level-points li{
  font-size:14px;color:var(--text);line-height:1.65;padding-left:18px;position:relative;
}
.level-points li::before{
  content:'';position:absolute;left:0;top:9px;width:8px;height:2px;background:var(--copper);
}
.level-cta{margin-top:22px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--ink);}
.level-cta svg{transition:transform .25s var(--ease);}
.level-cta:hover{color:var(--copper);}
.level-cta:hover svg{transform:translateX(4px);}

@media (max-width:1199.98px){
  .levels-grid{gap:40px;}
  .level-points{grid-template-columns:1fr 1fr;}
}
@media (max-width:991.98px){
  .levels-grid{grid-template-columns:1fr;gap:28px;}
  .ruler{position:static;}
  .ruler-list{display:flex;flex-wrap:wrap;gap:4px 26px;padding-left:0;}
  .ruler-list::before{display:none;}
  .ruler-list li{padding:6px 0;}
  .ruler-list li::before{display:none;}
}
@media (max-width:575.98px){
  .level-points{grid-template-columns:1fr;}
}

/* ========== 专属内容预览 ========== */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:32px;align-items:stretch;}
.feature-lead{
  position:relative;border-radius:var(--r-card);overflow:hidden;background:var(--ink);
  border:1px solid var(--card-line);display:block;min-height:380px;
}
.feature-lead img{width:100%;height:100%;min-height:380px;object-fit:cover;transition:transform .4s var(--ease);}
.feature-lead:hover img{transform:scale(1.03);}
.feature-lead::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,14,16,.05) 30%,rgba(12,14,16,.78) 100%);
}
.feature-lead-body{position:absolute;left:0;right:0;bottom:0;padding:28px 28px 26px;z-index:2;}
.feature-lead-body h3{color:#fff;font-size:24px;line-height:1.35;margin-top:14px;}
.feature-lead-body p{color:rgba(245,243,238,.78);font-size:14px;margin-top:10px;}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:700;letter-spacing:.06em;
  background:var(--copper);color:#fff;
}
.tag.on-dark{background:var(--lime);color:var(--ink);}

.feature-list{display:flex;flex-direction:column;gap:16px;}
.feature-item{
  display:flex;gap:16px;align-items:center;background:#fff;border:1px solid var(--card-line);
  border-radius:var(--r-card);padding:14px;transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.feature-item:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(21,23,26,.18);}
.feature-item img{width:96px;height:72px;object-fit:cover;border-radius:11px;flex:0 0 auto;}
.feature-item-body{min-width:0;}
.feature-item-body h4{font-size:15.5px;line-height:1.5;color:var(--ink);font-weight:700;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.feature-item-body span{display:block;margin-top:6px;font-size:12.5px;color:var(--muted);letter-spacing:.04em;}

@media (max-width:991.98px){
  .feature-grid{grid-template-columns:1fr;}
}

/* ========== 最新信息（CMS） ========== */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--card-line);
  border-radius:var(--r-card);overflow:hidden;height:100%;
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(21,23,26,.3);}
.post-card__media{
  position:relative;display:block;aspect-ratio:4/3;overflow:hidden;background:var(--ink);
}
.post-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .post-card__media img{transform:scale(1.03);}
.post-card__fallback{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  color:var(--lime);font-size:56px;font-weight:800;letter-spacing:-.02em;background:var(--ink-deep);
}
.post-card__body{padding:22px 22px 18px;display:flex;flex-direction:column;flex:1 1 auto;}
.post-card__cat{margin-bottom:12px;}
.post-card__title{
  font-size:17.5px;line-height:1.55;color:var(--ink);font-weight:800;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card__title:hover{color:var(--copper);}
.post-card__sum{
  margin-top:10px;font-size:14px;line-height:1.75;color:var(--muted);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card__meta{
  margin-top:auto;padding-top:18px;display:flex;align-items:center;justify-content:space-between;
  font-size:12.5px;color:var(--muted);border-top:1px solid var(--line);margin-top:20px;
}
.post-card__arrow{color:var(--ink);font-weight:700;display:inline-flex;align-items:center;gap:6px;transition:transform .25s var(--ease);}
.post-card:hover .post-card__arrow{transform:translateX(3px);color:var(--copper);}

.empty-state{
  grid-column:1/-1;text-align:center;padding:64px 24px;
  border:1px dashed var(--line);border-radius:var(--r-card);background:#fff;
}
.empty-state svg{margin:0 auto 16px;display:block;}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:18px;}

@media (max-width:991.98px){.post-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:767.98px){.post-grid{grid-template-columns:1fr;gap:18px;}}
@media (max-width:575.98px){.post-card__body{padding:16px;}}

/* ========== FAQ ========== */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start;}
.faq-aside{position:sticky;top:120px;}
.faq-aside h2{font-size:clamp(26px,2.6vw,36px);}
.faq-aside p{margin-top:16px;font-size:15px;color:var(--muted);}
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;background:none;border:none;padding:22px 0;text-align:left;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:24px;
  font-size:17px;font-weight:700;color:var(--ink);line-height:1.6;
}
.faq-q .ico{
  flex:0 0 auto;width:28px;height:28px;border-radius:50%;border:1px solid var(--line);
  display:inline-flex;align-items:center;justify-content:center;transition:transform .3s var(--ease),background .3s var(--ease),border-color .3s var(--ease);
}
.faq-q .ico svg{transition:transform .3s var(--ease);}
.faq-item.open .faq-q .ico{background:var(--lime);border-color:var(--lime);transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s var(--ease);}
.faq-a p{padding:0 0 24px;font-size:16px;line-height:1.85;color:var(--muted);max-width:760px;}
.faq-item.open .faq-q{color:var(--ink);}

@media (max-width:991.98px){
  .faq-grid{grid-template-columns:1fr;gap:28px;}
  .faq-aside{position:static;}
}

/* ========== 开通 CTA ========== */
.cta-band{
  position:relative;background:var(--ink-deep);color:var(--paper);overflow:hidden;
  padding:96px 0;
}
.cta-band::before{
  content:'';position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(245,243,238,.055) 1px,transparent 1px) 0 0/64px 64px,
    linear-gradient(rgba(245,243,238,.055) 1px,transparent 1px) 0 0/64px 64px;
  pointer-events:none;
}
.cta-grid{position:relative;display:grid;grid-template-columns:1fr 380px;gap:56px;align-items:center;}
.cta-band h2{color:#fff;font-size:clamp(28px,2.9vw,42px);line-height:1.2;}
.cta-band p.lead{margin-top:18px;font-size:16px;color:rgba(245,243,238,.72);max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px;}
.cta-card{
  background:rgba(245,243,238,.05);border:1px solid rgba(245,243,238,.16);
  border-radius:var(--r-card);padding:28px;
}
.cta-card .cap{font-size:12px;letter-spacing:.16em;color:rgba(245,243,238,.6);}
.cta-card .price{font-size:44px;font-weight:800;color:#fff;letter-spacing:-.02em;line-height:1.1;margin-top:14px;}
.cta-card .price i{font-style:normal;font-size:15px;font-weight:600;color:rgba(245,243,238,.6);margin-left:6px;}
.cta-card ul{margin-top:22px;display:flex;flex-direction:column;gap:12px;}
.cta-card ul li{font-size:14px;color:rgba(245,243,238,.78);padding-left:18px;position:relative;}
.cta-card ul li::before{content:'';position:absolute;left:0;top:10px;width:8px;height:2px;background:var(--lime);}

@media (max-width:991.98px){
  .cta-band{padding:72px 0;}
  .cta-grid{grid-template-columns:1fr;gap:40px;}
}
@media (max-width:575.98px){
  .cta-actions .btn-x{width:100%;}
}

/* ========== 页脚 ========== */
.site-footer{background:var(--paper);border-top:1px solid var(--line);padding-top:72px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:56px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px;}
.footer-brand .brand-text b{font-size:16px;}
.footer-brand .brand-text i{color:var(--muted);}
.footer-desc{font-size:14px;color:var(--muted);line-height:1.8;max-width:320px;}
.footer-col h4{font-size:13px;letter-spacing:.14em;color:var(--muted);font-weight:700;margin-bottom:18px;}
.footer-col li{margin-bottom:11px;}
.footer-col a{font-size:14.5px;color:var(--text);display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease);}
.footer-col a:hover{color:var(--copper);transform:translateX(2px);}
.footer-col p{font-size:14px;color:var(--muted);line-height:1.8;}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0;
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--muted);}
.footer-bottom a:hover{color:var(--copper);}

@media (max-width:991.98px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:575.98px){
  .site-footer{padding-top:48px;}
  .footer-grid{grid-template-columns:1fr;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* ========== 动效 ========== */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.in{opacity:1;transform:translateY(0);transition:opacity .3s var(--ease),transform .3s var(--ease);}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* 回到顶部 */
.to-top{
  position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;
  background:var(--ink);color:#fff;border:none;display:none;align-items:center;justify-content:center;
  cursor:pointer;z-index:900;box-shadow:var(--sh-2);transition:background .25s var(--ease),transform .25s var(--ease);
}
.to-top.show{display:flex;}
.to-top:hover{background:var(--copper);transform:translateY(-2px);}
@media (max-width:575.98px){.to-top{right:16px;bottom:16px;width:42px;height:42px;}}

/* roulang page: category1 */
:root{
  --ink:#15171A;
  --ink-deep:#0C0E10;
  --paper:#F5F3EE;
  --paper-alt:#EFEDE7;
  --white:#FFFFFF;
  --lime:#C7F03C;
  --copper:#C9631F;
  --text:#3A3F45;
  --muted:#7B8086;
  --line:#E4E0D7;
  --card-line:#E8E4DA;
  --lvl1:#8A8F96;
  --lvl2:#4E8C7A;
  --lvl3:#C9631F;
  --shadow-sm:0 1px 2px rgba(21,23,26,.04);
  --shadow-md:0 10px 24px rgba(21,23,26,.08);
  --r-btn:10px;
  --r-card:16px;
  --r-pill:999px;
  --font:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  padding-top:76px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .2s var(--ease);}
a:hover{color:var(--copper);}
button{font-family:var(--font);}
h1,h2,h3,h4{color:var(--ink);margin:0;line-height:1.2;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}

/* ---------- shell ---------- */
.shell{width:100%;max-width:1280px;margin:0 auto;padding:0 24px;}
@media (max-width:1399px){.shell{max-width:1140px;}}
@media (max-width:1199px){.shell{max-width:960px;}}
@media (max-width:991px){.shell{max-width:100%;padding:0 24px;}}
@media (max-width:575px){.shell{padding:0 16px;}}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(245,243,238,.92);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{box-shadow:0 6px 18px rgba(21,23,26,.06);}
.header-inner{
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  height:76px;
  gap:20px;
}
.nav-left{justify-self:start;display:flex;align-items:center;gap:28px;}
.nav-right-wrap{justify-self:end;display:flex;align-items:center;gap:24px;}
.nav-right{display:flex;align-items:center;gap:28px;}
.nav-a{
  position:relative;
  font-size:15px;
  color:var(--ink);
  padding:6px 0;
  white-space:nowrap;
}
.nav-a::after{
  content:"";
  position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--ink);
  transition:width .2s var(--ease);
}
.nav-a:hover::after,.nav-a.active::after{width:100%;}
.nav-a.active{font-weight:700;}
.nav-a.active::after{background:var(--lime);}
.brand{justify-self:center;display:flex;align-items:center;gap:10px;}
.brand-mark{display:inline-flex;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:17px;letter-spacing:.02em;color:var(--ink);font-weight:800;}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:.16em;color:var(--muted);}
.btn-join{
  display:inline-flex;align-items:center;justify-content:center;
  height:42px;padding:0 22px;
  background:var(--ink);color:#fff;
  border-radius:var(--r-btn);
  font-size:14px;font-weight:600;
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-join:hover{background:var(--ink-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md);}
.menu-toggle{
  display:none;
  width:42px;height:42px;
  border:1px solid var(--card-line);border-radius:10px;
  background:var(--white);color:var(--ink);
  align-items:center;justify-content:center;
  cursor:pointer;
}
.menu-toggle span{display:block;width:18px;height:1.6px;background:var(--ink);position:relative;}
.menu-toggle span::before,.menu-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.6px;background:var(--ink);
}
.menu-toggle span::before{top:-6px;}
.menu-toggle span::after{top:6px;}

.drawer{
  position:fixed;inset:76px 0 0 0;
  background:var(--paper);
  transform:translateX(100%);
  transition:transform .32s var(--ease);
  z-index:999;
  padding:32px 24px 48px;
  overflow-y:auto;
  display:none;
}
.drawer.is-open{transform:translateX(0);}
.drawer-list li{border-bottom:1px solid var(--line);}
.drawer-list a{
  display:flex;align-items:baseline;gap:14px;
  padding:20px 0;font-size:22px;font-weight:700;color:var(--ink);
}
.drawer-list .num{font-size:12px;letter-spacing:.12em;color:var(--muted);font-weight:600;}
.drawer-cta{margin-top:28px;display:flex;flex-direction:column;gap:12px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:52px;padding:0 28px;
  border-radius:var(--r-btn);
  font-size:15px;font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:all .22s var(--ease);
  background-image:none;
}
.btn-ink{background:var(--ink);color:#fff;}
.btn-ink:hover{background:var(--ink-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md);}
.btn-lime{background:var(--lime);color:var(--ink);}
.btn-lime:hover{background:#d4fb52;color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow-md);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--ink);color:var(--paper);}
.btn-ghost-light{background:transparent;color:var(--paper);border-color:rgba(245,243,238,.6);}
.btn-ghost-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper);}
.btn-sm{height:44px;padding:0 20px;font-size:14px;}

/* ---------- generic ---------- */
.section{padding:104px 0;}
.section-alt{background:var(--paper-alt);}
.section-tight{padding:76px 0;}
.eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.16em;color:var(--muted);
  font-weight:600;margin-bottom:16px;
}
.sec-head{margin-bottom:48px;max-width:760px;}
.sec-head h2{font-size:clamp(28px,2.8vw,40px);font-weight:800;letter-spacing:-.01em;}
.sec-head p{margin-top:16px;font-size:16px;color:var(--muted);}
.divider{height:1px;background:var(--line);border:0;margin:0;}
.tag{
  display:inline-flex;align-items:center;
  height:26px;padding:0 12px;
  border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.08em;
  background:rgba(201,99,31,.1);color:var(--copper);font-weight:600;
}
.tag-ink{background:var(--ink);color:var(--paper);letter-spacing:.1em;}

/* ---------- hero ---------- */
.hero{padding:72px 0 88px;}
.hero-grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:56px;
  align-items:center;
}
.hero h1{
  font-size:clamp(34px,4.2vw,58px);
  font-weight:800;
  line-height:1.14;
  letter-spacing:-.02em;
  margin-top:14px;
}
.hero h1 em{font-style:normal;position:relative;white-space:nowrap;}
.hero h1 em::after{
  content:"";position:absolute;left:0;right:0;bottom:6px;height:8px;
  background:var(--lime);z-index:-1;opacity:.85;
}
.hero-sub{margin-top:22px;font-size:18px;color:var(--text);max-width:520px;}
.hero-actions{display:flex;gap:12px;margin-top:34px;flex-wrap:wrap;}
.hero-facts{
  margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
.fact-num{
  font-size:38px;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1;
}
.fact-label{font-size:13px;color:var(--muted);margin-top:8px;}
.hero-media{position:relative;}
.hero-media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;
  border-radius:var(--r-card);
  border:1px solid var(--card-line);
}
.hero-badge{
  position:absolute;left:-18px;bottom:32px;
  background:var(--ink);color:var(--paper);
  padding:16px 20px;border-radius:14px;
  box-shadow:var(--shadow-md);
  min-width:190px;
}
.hero-badge b{display:block;font-size:13px;letter-spacing:.12em;color:var(--lime);margin-bottom:6px;}
.hero-badge span{font-size:14px;line-height:1.6;display:block;}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:24px;}
.step{position:relative;padding-top:26px;transition:transform .3s var(--ease);}
.step::before{
  content:"";position:absolute;left:0;right:-24px;top:0;height:1px;background:var(--line);
}
.step:last-child::before{right:0;}
.step.is-current::before{background:var(--lime);height:2px;top:-1px;}
.step-no{font-size:12px;letter-spacing:.14em;color:var(--muted);font-weight:700;}
.step.is-current .step-no{color:var(--copper);}
.step h3{font-size:17px;margin-top:10px;font-weight:700;}
.step p{font-size:14px;color:var(--muted);margin-top:10px;}
.step:hover{transform:translateY(-2px);}

/* ---------- table ---------- */
.table-wrap{
  background:var(--white);
  border:1px solid var(--card-line);
  border-radius:var(--r-card);
  overflow:hidden;
}
.table-scroll{overflow-x:auto;}
.tier-table{min-width:720px;font-size:15px;}
.tier-table th,.tier-table td{padding:18px 20px;text-align:left;border-bottom:1px solid var(--line);}
.tier-table thead th{
  font-size:13px;letter-spacing:.08em;color:var(--muted);font-weight:600;
  background:var(--white);position:sticky;top:0;z-index:2;
}
.tier-table tbody tr:last-child td{border-bottom:0;}
.tier-table tbody tr{transition:background .2s var(--ease);}
.tier-table tbody tr:hover{background:var(--paper);}
.tier-table td:first-child{color:var(--ink);font-weight:600;}
.col-rec{position:relative;background:rgba(199,240,60,.14);}
.tier-table thead th.col-rec{box-shadow:inset 0 0 0 1px var(--lime);border-radius:12px 12px 0 0;}
.tier-table tbody tr:last-child td.col-rec{box-shadow:inset 0 0 0 1px var(--lime);border-radius:0 0 12px 12px;}
.tier-table tbody td.col-rec{box-shadow:inset 1px 0 0 var(--lime),inset -1px 0 0 var(--lime);}
.rec-badge{
  position:absolute;top:-12px;left:50%;transform:translateX(-50%);
  background:var(--lime);color:var(--ink);
  font-size:11px;letter-spacing:.1em;font-weight:700;
  padding:3px 10px;border-radius:var(--r-pill);
}
.mark-yes{color:var(--lvl2);font-weight:700;}
.mark-no{color:#C2C6CB;}
.notice{
  display:flex;gap:16px;
  background:var(--paper-alt);
  border-left:3px solid var(--copper);
  border-radius:0 12px 12px 0;
  padding:20px 24px;
  margin-top:28px;
}
.notice strong{color:var(--ink);}
.notice p{font-size:15px;color:var(--text);}

/* ---------- scene cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.scene-card{
  background:var(--white);
  border:1px solid var(--card-line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
  display:flex;flex-direction:column;
}
.scene-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);border-color:rgba(21,23,26,.3);}
.scene-media{position:relative;overflow:hidden;}
.scene-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .4s var(--ease);}
.scene-card:hover .scene-media img{transform:scale(1.03);}
.scene-media .tag{position:absolute;left:16px;top:16px;background:rgba(245,243,238,.94);color:var(--ink);}
.scene-body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1;}
.scene-body h3{font-size:19px;font-weight:700;}
.scene-body p{font-size:15px;color:var(--muted);}
.scene-list{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);}
.scene-list li{position:relative;padding-left:20px;font-size:14px;color:var(--text);margin-bottom:8px;}
.scene-list li::before{
  content:"";position:absolute;left:0;top:10px;width:6px;height:6px;background:var(--copper);
}

/* ---------- checklist block ---------- */
.check-grid{display:grid;grid-template-columns:6fr 5fr;gap:56px;align-items:start;}
.check-list{border-top:1px solid var(--line);margin-top:28px;}
.check-list li{
  display:grid;grid-template-columns:auto 1fr;gap:18px;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.check-idx{
  font-size:14px;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:.04em;
}
.check-list h4{font-size:17px;font-weight:700;margin-bottom:6px;}
.check-list p{font-size:15px;color:var(--muted);}
.quote-block{
  border-left:3px solid var(--copper);
  background:var(--paper-alt);
  padding:24px 26px;border-radius:0 12px 12px 0;
}
.quote-block p{font-size:16px;color:var(--text);}
.aside-media{margin-top:28px;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--card-line);}
.aside-media img{width:100%;aspect-ratio:16/10;object-fit:cover;}
.aside-caption{font-size:13px;color:var(--muted);text-align:center;padding:12px 0 0;}

/* ---------- faq ---------- */
.faq-acc .accordion-item{
  background:transparent;border:0;border-bottom:1px solid var(--line);border-radius:0;
}
.faq-acc .accordion-button{
  background:transparent;color:var(--ink);
  font-size:17px;font-weight:700;
  padding:24px 44px 24px 0;
  box-shadow:none;
}
.faq-acc .accordion-button:not(.collapsed){color:var(--ink);box-shadow:none;}
.faq-acc .accordion-button:focus{box-shadow:none;outline:2px solid var(--lime);outline-offset:2px;border-radius:6px;}
.faq-acc .accordion-button::after{
  background-image:none;
  content:"";
  position:absolute;right:8px;top:50%;
  width:10px;height:10px;
  border-right:2px solid var(--ink);
  border-bottom:2px solid var(--ink);
  transform:translateY(-70%) rotate(45deg);
  transition:transform .3s var(--ease);
  margin:0;
}
.faq-acc .accordion-button:not(.collapsed)::after{transform:translateY(-30%) rotate(-135deg);}
.faq-acc .accordion-body{padding:0 60px 26px 0;font-size:16px;color:var(--muted);line-height:1.85;}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--ink-deep);color:var(--paper);
  position:relative;overflow:hidden;
  padding:96px 0;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(245,243,238,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(245,243,238,.06) 1px,transparent 1px);
  background-size:48px 48px;
}
.cta-inner{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.4fr 1fr;gap:56px;align-items:center;
}
.cta-inner h2{color:var(--paper);font-size:clamp(28px,2.8vw,40px);font-weight:800;}
.cta-inner .cta-sub{margin-top:16px;font-size:16px;color:rgba(245,243,238,.7);}
.cta-actions{display:flex;gap:12px;margin-top:32px;flex-wrap:wrap;}
.cta-card{
  background:rgba(245,243,238,.05);
  border:1px solid rgba(245,243,238,.16);
  border-radius:var(--r-card);
  padding:26px;
}
.cta-card h3{color:var(--paper);font-size:16px;letter-spacing:.06em;font-weight:700;}
.cta-card ul{margin-top:18px;}
.cta-card li{
  display:flex;justify-content:space-between;gap:16px;
  padding:12px 0;border-bottom:1px solid rgba(245,243,238,.12);
  font-size:14px;color:rgba(245,243,238,.78);
}
.cta-card li:last-child{border-bottom:0;}
.cta-card li b{color:var(--lime);font-weight:700;}

/* ---------- footer ---------- */
.site-footer{background:var(--white);border-top:1px solid var(--line);padding:72px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:44px;}
.footer-brand{display:flex;align-items:center;gap:10px;}
.footer-desc{margin-top:18px;font-size:14px;color:var(--muted);max-width:300px;}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--ink);margin-bottom:18px;font-weight:700;}
.footer-col ul li{margin-bottom:12px;}
.footer-col a{font-size:14px;color:var(--muted);display:inline-block;transition:color .2s var(--ease),transform .2s var(--ease);}
.footer-col a:hover{color:var(--copper);transform:translateX(2px);}
.footer-col p{font-size:14px;color:var(--muted);}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);
  padding:22px 0;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{font-size:13px;color:var(--ink);}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-in{opacity:1;transform:none;transition:opacity .3s var(--ease),transform .3s var(--ease);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .hero-grid{gap:40px;}
  .check-grid{gap:40px;}
  .cta-inner{gap:40px;}
}
@media (max-width:991px){
  body{padding-top:68px;}
  .header-inner{height:68px;grid-template-columns:auto 1fr auto;gap:12px;}
  .nav-left,.nav-right{display:none;}
  .nav-right-wrap{gap:12px;}
  .menu-toggle{display:inline-flex;}
  .drawer{display:block;inset:68px 0 0 0;}
  .brand-text i{display:none;}
  .brand-text b{font-size:15px;}
  .btn-join{height:38px;padding:0 15px;font-size:13px;}
  .hero{padding:48px 0 64px;}
  .hero-grid{grid-template-columns:1fr;gap:36px;}
  .hero-media img{aspect-ratio:16/10;}
  .hero-badge{left:16px;bottom:16px;}
  .section{padding:76px 0;}
  .section-tight{padding:56px 0;}
  .steps{grid-template-columns:repeat(2,1fr);gap:28px 24px;}
  .step::before{right:-24px;}
  .step:nth-child(2n)::before{right:0;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .check-grid{grid-template-columns:1fr;}
  .cta-inner{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;}
}
@media (max-width:767px){
  body{font-size:16px;}
  .hero-sub{font-size:17px;}
  .hero-facts{grid-template-columns:repeat(3,1fr);gap:16px;}
  .fact-num{font-size:30px;}
  .section{padding:56px 0;}
  .section-tight{padding:48px 0;}
  .steps{grid-template-columns:1fr;gap:0;}
  .step{padding:20px 0 20px 0;border-bottom:1px solid var(--line);}
  .step::before{display:none;}
  .card-grid{grid-template-columns:1fr;}
  .scene-body{padding:20px;}
  .cta-band{padding:64px 0;}
  .accordion-body{padding-right:0;}
  .faq-acc .accordion-body{padding:0 0 24px 0;}
  .footer-grid{grid-template-columns:1fr;gap:32px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:575px){
  .hero-actions .btn{width:100%;}
  .cta-actions .btn{width:100%;}
  .hero-badge{position:static;margin-top:16px;min-width:0;}
  .scene-body{padding:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: article */
:root{
  --ink:#15171A;
  --ink-deep:#0C0E10;
  --paper:#F5F3EE;
  --paper-alt:#EFEDE7;
  --white:#FFFFFF;
  --lime:#C7F03C;
  --lime-hi:#D3F65B;
  --copper:#C9631F;
  --text:#3A3F45;
  --muted:#7B8086;
  --line:#E4E0D7;
  --card-line:#E8E4DA;
  --lv-1:#8A8F96;
  --lv-2:#4E8C7A;
  --lv-3:#C9631F;
  --lv-4:#15171A;
  --r-btn:10px;
  --r-card:16px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(21,23,26,.04);
  --sh-2:0 10px 24px rgba(21,23,26,.08);
  --ease:cubic-bezier(.22,.61,.36,1);
  --shell:1280px;
  --nav-h:76px;
}
@media (max-width:1399px){:root{--shell:1140px;}}
@media (max-width:1199px){:root{--shell:960px;}}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
html,body{overflow-x:hidden;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',system-ui,-apple-system,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,h5{margin:0;color:var(--ink);font-weight:800;line-height:1.25;letter-spacing:-.01em;}
p{margin:0 0 1em;}
ul,ol{margin:0;padding:0;}
li{list-style:none;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}
::selection{background:var(--lime);color:var(--ink);}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px;}
.sec{padding:96px 0;}
.sec-alt{background:var(--paper-alt);}
@media (max-width:991px){.sec{padding:72px 0;}}
@media (max-width:767px){.sec{padding:56px 0;}.shell{padding:0 24px;}}
@media (max-width:575px){.shell{padding:0 16px;}}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:50px;padding:0 26px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;letter-spacing:.01em;
  border:1px solid transparent;background-image:none;box-shadow:none;
  cursor:pointer;white-space:nowrap;text-decoration:none;
  transition:transform .2s var(--ease),background-color .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:focus,.btn:active{outline:none;}
.btn-ink{background-color:var(--ink);border-color:var(--ink);color:var(--paper);}
.btn-ink:hover{background-color:var(--ink-deep);border-color:var(--ink-deep);color:#fff;transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-lime{background-color:var(--lime);border-color:var(--lime);color:var(--ink);font-weight:700;}
.btn-lime:hover{background-color:var(--lime-hi);border-color:var(--lime-hi);color:var(--ink);transform:translateY(-2px);box-shadow:var(--sh-2);}
.btn-ghost{background-color:transparent;border-color:var(--ink);color:var(--ink);}
.btn-ghost:hover{background-color:var(--ink);border-color:var(--ink);color:var(--paper);transform:translateY(-2px);}
.btn-outline-light{background-color:transparent;border-color:rgba(245,243,238,.45);color:var(--paper);}
.btn-outline-light:hover{background-color:var(--paper);border-color:var(--paper);color:var(--ink);transform:translateY(-2px);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;border-radius:9px;}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px;}

/* 导航 */
.site-header{
  position:sticky;top:0;z-index:1030;
  background:rgba(245,243,238,.94);
  border-bottom:1px solid transparent;
  transition:background-color .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(245,243,238,.92);
  border-bottom-color:var(--line);
  box-shadow:0 1px 0 rgba(21,23,26,.02);
  backdrop-filter:blur(8px);
  -webkit-backdrop-filter:blur(8px);
}
.nav-bar{
  display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
  height:var(--nav-h);
}
.nav-side{display:flex;align-items:center;gap:30px;min-width:0;}
.nav-right{justify-content:flex-end;gap:20px;}
.nav-a{
  position:relative;display:inline-block;
  font-size:15px;color:var(--text);padding:6px 0;white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-a::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--ink);transform:scaleX(0);transform-origin:left center;
  transition:transform .2s var(--ease);
}
.nav-a:hover{color:var(--ink);}
.nav-a:hover::after,.nav-a.active::after{transform:scaleX(1);}
.nav-a.active{color:var(--ink);font-weight:700;}
.brand{display:flex;align-items:center;gap:10px;justify-self:center;padding:0 16px;}
.brand-mark{display:inline-flex;flex:0 0 auto;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-text b{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:.01em;}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:.22em;color:var(--muted);margin-top:3px;}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;
  background:transparent;padding:0;align-items:center;justify-content:center;
  flex-direction:column;gap:5px;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);transition:transform .2s var(--ease),opacity .2s var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){opacity:0;}
.nav-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
.nav-drawer{
  position:fixed;left:0;right:0;top:var(--nav-h);bottom:0;z-index:1029;
  background:var(--paper);padding:8px 24px 40px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-10px);
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
}
.nav-drawer.open{opacity:1;visibility:visible;transform:none;}
.nav-drawer a{
  display:flex;align-items:baseline;gap:14px;
  font-size:22px;font-weight:700;color:var(--ink);
  padding:20px 0;border-bottom:1px solid var(--line);
}
.nav-drawer a i{font-style:normal;font-size:12px;letter-spacing:.14em;color:var(--muted);font-weight:600;}
.nav-drawer .drawer-cta{margin-top:28px;border-bottom:none;}
@media (max-width:991px){
  .nav-side .nav-a{display:none;}
  .nav-toggle{display:inline-flex;}
  .nav-right .nav-a{display:none;}
  .nav-right .nav-cta{height:38px;padding:0 16px;font-size:14px;}
  .brand{padding:0 10px;}
  .brand-text b{font-size:16px;}
  .brand-text i{font-size:10px;letter-spacing:.16em;}
}

/* 文章头部 */
.article-hero{
  position:relative;overflow:hidden;
  background:var(--paper-alt);
  border-bottom:1px solid var(--line);
  padding:40px 0 44px;
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(21,23,26,.032) 1px,transparent 1px),linear-gradient(90deg,rgba(21,23,26,.032) 1px,transparent 1px);
  background-size:52px 52px;
}
.article-hero .shell{position:relative;z-index:1;}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--muted);margin-bottom:26px;}
.crumbs a{color:var(--muted);transition:color .2s var(--ease);}
.crumbs a:hover{color:var(--copper);}
.crumbs .sep{color:#C9C4B8;}
.crumbs .now{color:var(--ink);max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.article-head{max-width:920px;}
.badge-cat{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;
  border-radius:var(--r-pill);border:1px solid rgba(201,99,31,.35);
  background:rgba(201,99,31,.07);color:var(--copper);
  font-size:12px;font-weight:700;letter-spacing:.12em;
}
.article-head h1{
  font-size:clamp(30px,3.6vw,48px);
  line-height:1.2;margin:20px 0 22px;
  letter-spacing:-.02em;font-weight:800;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:14px;font-size:14px;color:var(--muted);}
.meta-row .dot{width:4px;height:4px;background:#C9C4B8;border-radius:50%;}
.meta-row b{color:var(--ink);font-weight:600;}

/* 正文布局 */
.article-main{padding:64px 0 24px;}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:48px;max-width:780px;margin:0 auto;}
@media (min-width:1200px){
  .article-layout{grid-template-columns:minmax(0,760px) 300px;justify-content:center;max-width:none;gap:64px;}
}
.article-body{font-size:17px;line-height:1.9;color:var(--text);min-width:0;}
.article-body>*:first-child{margin-top:0;}
.article-body h2{
  position:relative;font-size:28px;line-height:1.3;color:var(--ink);
  margin:56px 0 18px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:3px;
  background:var(--lime);border-radius:2px;
}
.article-body h3{font-size:22px;line-height:1.35;color:var(--ink);margin:38px 0 14px;}
.article-body h4{font-size:18px;color:var(--ink);margin:28px 0 12px;}
.article-body p{margin:0 0 1em;}
.article-body strong{color:var(--ink);font-weight:700;}
.article-body a{color:var(--copper);border-bottom:1px solid rgba(201,99,31,.35);}
.article-body a:hover{border-bottom-color:var(--copper);}
.article-body ul{margin:0 0 1.2em;padding-left:0;}
.article-body ul li{position:relative;padding-left:18px;margin:0 0 .55em;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.72em;width:7px;height:7px;
  background:var(--copper);border-radius:1px;
}
.article-body ol{margin:0 0 1.2em;padding-left:1.4em;counter-reset:none;}
.article-body ol li{list-style:decimal;margin:0 0 .55em;padding-left:4px;}
.article-body ol li::marker{color:var(--copper);font-weight:700;}
.article-body blockquote{
  margin:30px 0;padding:20px 24px;background:var(--paper);
  border-left:3px solid var(--copper);border-radius:0 12px 12px 0;
  color:var(--text);font-size:16.5px;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{
  width:100%;height:auto;border-radius:var(--r-card);
  border:1px solid var(--card-line);margin:28px 0;background:var(--ink-deep);
}
.article-body figure{margin:30px 0;}
.article-body figure img{margin:0;}
.article-body figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:10px;line-height:1.7;}
.article-body hr{border:none;border-top:1px solid var(--line);margin:44px 0;}
.article-body table{
  display:block;width:100%;overflow-x:auto;border-collapse:collapse;
  font-size:15px;line-height:1.7;background:var(--white);
  border:1px solid var(--card-line);border-radius:var(--r-card);
  margin:28px 0;
}
.article-body thead{border-bottom:1px solid var(--line);}
.article-body th{
  background:var(--paper-alt);color:var(--muted);font-weight:700;
  font-size:13px;letter-spacing:.08em;text-align:left;white-space:nowrap;
}
.article-body th,.article-body td{padding:14px 18px;border-bottom:1px solid var(--line);}
.article-body tbody tr:last-child td{border-bottom:none;}
.article-body code{background:var(--paper-alt);padding:2px 7px;border-radius:6px;font-size:15px;color:var(--ink);}

/* 空态 */
.article-empty{
  background:var(--white);border:1px solid var(--card-line);border-radius:var(--r-card);
  padding:56px 32px;text-align:center;box-shadow:var(--sh-1);
}
.article-empty h2{font-size:24px;margin:0 0 14px;padding:0;}
.article-empty h2::before{display:none;}
.article-empty p{font-size:16px;color:var(--muted);max-width:440px;margin:0 auto 26px;}

/* 侧栏 */
.article-aside{min-width:0;}
.side-card{
  position:sticky;top:104px;
  background:var(--white);border:1px solid var(--card-line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);
}
.side-title{font-size:14px;letter-spacing:.12em;color:var(--muted);font-weight:700;margin-bottom:18px;}
.side-list li{
  display:flex;justify-content:space-between;gap:12px;align-items:baseline;
  padding:11px 0;border-bottom:1px solid var(--line);font-size:14px;
}
.side-list li:last-child{border-bottom:none;}
.side-list span{color:var(--muted);}
.side-list b{color:var(--ink);font-weight:600;text-align:right;}
.side-links{margin-top:18px;padding-top:18px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:4px;}
.side-link{
  display:flex;align-items:center;justify-content:space-between;
  font-size:14px;color:var(--text);padding:9px 0;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.side-link:hover{color:var(--copper);transform:translateX(2px);}
.side-top{margin-top:18px;width:100%;height:44px;font-size:14px;}
@media (max-width:1199px){
  .side-card{position:static;}
  .article-aside{margin-top:8px;}
}

/* 相关推荐 */
.related{padding:72px 0 0;}
.sec-head{max-width:640px;margin-bottom:36px;}
.sec-head h2{font-size:clamp(24px,2.4vw,32px);margin-bottom:12px;}
.sec-head p{color:var(--muted);font-size:15px;margin:0;}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
@media (max-width:991px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
@media (max-width:767px){.card-grid{grid-template-columns:minmax(0,1fr);}}
.post-card{
  display:flex;flex-direction:column;height:100%;
  background:var(--white);border:1px solid var(--card-line);
  border-radius:var(--r-card);padding:24px;box-shadow:var(--sh-1);
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(21,23,26,.3);}
.post-card__media{
  position:relative;aspect-ratio:4/3;border-radius:12px;overflow:hidden;
  background:var(--ink-deep);margin-bottom:20px;
}
.post-card__media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease);}
.post-card:hover .post-card__media img{transform:scale(1.03);}
.post-card__num{
  position:absolute;left:0;top:0;bottom:0;right:0;display:flex;align-items:center;justify-content:center;
  font-size:52px;font-weight:700;color:var(--lime);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;
}
.post-card__badge{
  align-self:flex-start;display:inline-flex;align-items:center;height:24px;padding:0 11px;
  border-radius:var(--r-pill);font-size:12px;font-weight:700;letter-spacing:.08em;
  background:rgba(201,99,31,.08);color:var(--copper);border:1px solid rgba(201,99,31,.28);
  margin-bottom:14px;
}
.post-card h3{
  font-size:19px;line-height:1.45;margin-bottom:10px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card p{
  font-size:14px;line-height:1.75;color:var(--muted);margin:0 0 20px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.post-card__meta{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  padding-top:16px;border-top:1px solid var(--line);
  font-size:13px;color:var(--muted);
}
.post-card__meta .arrow{color:var(--ink);transition:transform .2s var(--ease);}
.post-card:hover .post-card__meta .arrow{transform:translateX(3px);}

/* 上下篇 */
.article-nav{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;
  margin-top:56px;
}
.anav{
  display:flex;flex-direction:column;gap:8px;
  background:var(--white);border:1px solid var(--card-line);border-radius:var(--r-card);
  padding:22px 24px;transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.anav:hover{border-color:rgba(21,23,26,.3);transform:translateY(-2px);}
.anav small{font-size:12px;letter-spacing:.12em;color:var(--muted);}
.anav b{font-size:17px;color:var(--ink);font-weight:700;}
.anav-next{text-align:right;align-items:flex-end;}
@media (max-width:575px){.article-nav{grid-template-columns:minmax(0,1fr);}}

/* CTA */
.cta-wrap{padding:88px 0 96px;}
.cta-band{
  position:relative;overflow:hidden;border-radius:24px;
  background:var(--ink-deep);color:var(--paper);
  padding:56px;display:grid;grid-template-columns:1.4fr .9fr;gap:48px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(245,243,238,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(245,243,238,.055) 1px,transparent 1px);
  background-size:44px 44px;
}
.cta-band>*{position:relative;z-index:1;}
.cta-band h2{color:var(--paper);font-size:clamp(24px,2.6vw,34px);margin-bottom:16px;}
.cta-band p{color:rgba(245,243,238,.72);font-size:16px;margin:0 0 28px;max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}
.cta-card{
  background:rgba(245,243,238,.05);border:1px solid rgba(245,243,238,.16);
  border-radius:var(--r-card);padding:24px;
}
.cta-card h3{color:var(--paper);font-size:15px;letter-spacing:.1em;margin-bottom:16px;}
.cta-card-row{
  display:flex;justify-content:space-between;align-items:center;gap:12px;
  padding:12px 0;border-bottom:1px solid rgba(245,243,238,.12);font-size:14px;
}
.cta-card-row:last-child{border-bottom:none;}
.cta-card-row span{color:rgba(245,243,238,.7);}
.cta-card-row b{color:var(--paper);font-weight:600;}
.cta-card-row i{font-style:normal;display:inline-block;width:8px;height:8px;border-radius:2px;margin-right:9px;vertical-align:1px;}
.lv1 i{background:var(--lv-1);}
.lv2 i{background:var(--lv-2);}
.lv3 i{background:var(--lv-3);}
.lv4 i{background:var(--lime);}
@media (max-width:991px){.cta-band{grid-template-columns:minmax(0,1fr);padding:44px;gap:32px;}}
@media (max-width:767px){.cta-band{padding:32px 24px;border-radius:20px;}.cta-actions .btn{width:100%;}}

/* 页脚 */
.site-footer{background:var(--paper-alt);border-top:1px solid var(--line);padding:64px 0 0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-desc{font-size:14px;color:var(--muted);line-height:1.8;margin:0;max-width:320px;}
.footer-col h4{font-size:13px;letter-spacing:.12em;color:var(--ink);margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;}
.footer-col a{
  font-size:14px;color:var(--text);display:inline-block;
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col a:hover{color:var(--copper);transform:translateX(-2px);}
.footer-col p{font-size:14px;color:var(--muted);line-height:1.8;margin:0;}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);padding:22px 0 28px;
  font-size:13px;color:var(--muted);
}
.footer-bottom a{color:var(--ink);font-weight:600;}
.footer-bottom a:hover{color:var(--copper);}
@media (max-width:991px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;}}
@media (max-width:575px){
  .footer-grid{grid-template-columns:minmax(0,1fr);padding-bottom:32px;}
  .site-footer{padding-top:48px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}

/* 入场动效 */
.fade-up{opacity:0;transform:translateY(12px);transition:opacity .3s var(--ease),transform .3s var(--ease);}
.fade-up.in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  .fade-up{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --ink:#15171A;
  --ink-deep:#0C0E10;
  --paper:#F5F3EE;
  --paper-alt:#EFEDE7;
  --white:#FFFFFF;
  --lime:#C7F03C;
  --lime-hi:#D2F65A;
  --copper:#C9631F;
  --tier-gray:#8A8F96;
  --tier-green:#4E8C7A;
  --line:#E4E0D7;
  --card-line:#E8E4DA;
  --t-head:#15171A;
  --t-body:#3A3F45;
  --t-mute:#7B8086;
  --shadow-1:0 1px 2px rgba(21,23,26,.04);
  --shadow-2:0 10px 24px rgba(21,23,26,.08);
  --r-btn:10px;
  --r-card:16px;
  --r-pill:999px;
  --shell:1280px;
  --nav-h:76px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  padding-top:var(--nav-h);
  background:var(--paper);
  color:var(--t-body);
  font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease),padding-left .2s var(--ease)}
a:hover{color:var(--copper)}
h1,h2,h3,h4{color:var(--t-head);margin:0;font-weight:700;line-height:1.2}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px}
.section{padding:104px 0}
.section--alt{background:var(--paper-alt)}
.section--tight{padding:80px 0}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:1040;
  height:var(--nav-h);
  background:rgba(245,243,238,.95);
  border-bottom:1px solid transparent;
  transition:background .25s var(--ease),border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.site-header.scrolled{
  background:rgba(245,243,238,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-1);
}
.header-inner{
  height:var(--nav-h);
  display:grid;
  grid-template-columns:1fr auto 1fr;
  align-items:center;
  gap:16px;
}
.nav-side{display:flex;align-items:center;gap:26px}
.nav-left{justify-self:start}
.nav-right{justify-self:end;gap:18px}
.nav-a{
  position:relative;
  font-size:15px;
  color:var(--t-body);
  padding:4px 0;
  white-space:nowrap;
}
.nav-a::after{
  content:'';
  position:absolute;left:0;bottom:-2px;
  width:100%;height:2px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-a:hover{color:var(--ink)}
.nav-a:hover::after,.nav-a.active::after{transform:scaleX(1)}
.nav-a.active{color:var(--ink);font-weight:600}
.brand{
  display:flex;align-items:center;gap:10px;justify-self:center;white-space:nowrap;
}
.brand-mark{display:inline-flex;line-height:0}
.brand-text{display:flex;flex-direction:column;line-height:1.05}
.brand-text b{font-size:17px;color:var(--ink);letter-spacing:.02em}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:.24em;color:var(--t-mute);margin-top:2px}
.btn-ink{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--ink);color:var(--paper);
  border:1px solid var(--ink);border-radius:var(--r-btn);
  font-size:15px;font-weight:600;padding:11px 20px;
  transition:background .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease),color .22s var(--ease);
}
.btn-ink:hover{background:var(--ink-deep);color:var(--paper);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ink.btn-sm{padding:9px 16px;font-size:14px}
.btn-lime{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:var(--lime);color:var(--ink);
  border:1px solid var(--lime);border-radius:var(--r-btn);
  font-size:16px;font-weight:700;padding:13px 26px;
  transition:background .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-lime:hover{background:var(--lime-hi);color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow-2)}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  background:transparent;color:var(--ink);
  border:1px solid var(--ink);border-radius:var(--r-btn);
  font-size:16px;font-weight:600;padding:12px 24px;
  transition:background .22s var(--ease),color .22s var(--ease),transform .22s var(--ease);
}
.btn-ghost:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-ghost--light{border-color:rgba(245,243,238,.6);color:var(--paper)}
.btn-ghost--light:hover{background:var(--paper);color:var(--ink)}
.mobile-bar{display:none}
.drawer{display:none}

/* ---------- category hero ---------- */
.cat-hero{padding:72px 0 88px;border-bottom:1px solid var(--line)}
.cat-hero__grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.kicker{
  display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--copper);
  font-weight:600;text-transform:uppercase;margin-bottom:18px;
}
.cat-hero__numrow{display:flex;align-items:flex-start;gap:22px}
.big-num{
  font-size:clamp(64px,7vw,96px);
  font-weight:700;line-height:.9;letter-spacing:-.03em;
  color:var(--ink);font-variant-numeric:tabular-nums;
  position:relative;padding-bottom:10px;
}
.big-num::after{
  content:'';position:absolute;left:2px;bottom:0;width:56px;height:6px;background:var(--lime);
}
.cat-hero h1{
  font-size:clamp(30px,3.1vw,44px);
  line-height:1.18;letter-spacing:-.01em;
}
.cat-hero .lead{margin-top:20px;font-size:17px;color:var(--t-body);max-width:60ch}
.anchor-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.anchor-row a{
  font-size:13px;color:var(--t-body);border:1px solid var(--card-line);
  background:var(--white);border-radius:var(--r-pill);padding:7px 15px;
  transition:border-color .2s var(--ease),color .2s var(--ease),transform .2s var(--ease);
}
.anchor-row a:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-2px)}
.cat-hero__aside{
  background:var(--white);border:1px solid var(--card-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.cat-hero__media{position:relative;aspect-ratio:4/3;overflow:hidden}
.cat-hero__media img{width:100%;height:100%;object-fit:cover}
.cat-hero__media::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(12,14,16,.05),rgba(12,14,16,.55));
}
.cat-hero__media span{
  position:absolute;left:18px;bottom:16px;z-index:2;
  color:var(--paper);font-size:13px;letter-spacing:.08em;
}
.scale-list{padding:22px 24px 24px;display:grid;grid-template-columns:1fr 1fr;gap:18px 20px}
.scale-item{border-top:2px solid var(--ink);padding-top:10px}
.scale-item b{
  display:block;font-size:28px;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;line-height:1.1;
}
.scale-item span{font-size:13px;color:var(--t-mute)}
.scale-item:nth-child(2){border-top-color:var(--copper)}
.scale-item:nth-child(3){border-top-color:var(--tier-green)}
.scale-item:nth-child(4){border-top-color:var(--lime)}

/* ---------- section head ---------- */
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:52px;flex-wrap:wrap}
.sec-head__txt{max-width:62ch}
.sec-head h2{font-size:clamp(28px,2.8vw,40px);letter-spacing:-.01em}
.sec-head p{margin-top:14px;color:var(--t-mute);font-size:16px}
.sec-head .kicker{margin-bottom:14px}

/* ---------- tier zigzag ---------- */
.tier-row{
  display:grid;grid-template-columns:1fr 1.05fr;gap:56px;align-items:center;
}
.tier-row + .tier-row{margin-top:88px;padding-top:88px;border-top:1px solid var(--line)}
.tier-media{position:relative;border-radius:var(--r-card);overflow:hidden;border:1px solid var(--card-line);background:var(--ink-deep)}
.tier-media img{width:100%;aspect-ratio:16/11;object-fit:cover;transition:transform .4s var(--ease)}
.tier-media:hover img{transform:scale(1.03)}
.tier-media__tag{
  position:absolute;left:16px;top:16px;z-index:2;
  background:var(--paper);color:var(--ink);font-size:12px;letter-spacing:.12em;
  padding:6px 12px;border-radius:var(--r-pill);font-weight:600;
}
.tier-row:nth-child(even) .tier-media{order:2}
.tier-badge{
  display:inline-block;font-size:12px;letter-spacing:.12em;font-weight:600;
  padding:5px 13px;border-radius:var(--r-pill);border:1px solid transparent;margin-bottom:16px;
}
.tier-badge--gray{background:rgba(138,143,150,.14);color:#5C6167;border-color:rgba(138,143,150,.34)}
.tier-badge--green{background:rgba(78,140,122,.14);color:#316B5A;border-color:rgba(78,140,122,.34)}
.tier-badge--copper{background:rgba(201,99,31,.13);color:var(--copper);border-color:rgba(201,99,31,.32)}
.tier-badge--top{background:var(--ink);color:var(--lime);border-color:var(--ink)}
.tier-body h3{font-size:23px;letter-spacing:-.01em}
.tier-oneline{margin-top:12px;color:var(--t-body);font-size:16px}
.tier-quote{
  margin-top:18px;padding:12px 0 12px 16px;border-left:3px solid var(--copper);
  background:var(--paper);font-size:15px;color:var(--t-body);
}
.tick-list{margin-top:22px;display:grid;gap:12px}
.tick-list li{display:flex;gap:12px;font-size:15.5px;color:var(--t-body)}
.tick-list li i{color:var(--copper);font-size:13px;margin-top:7px;flex:0 0 auto}
.tier-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:26px;
  font-size:15px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--ink);padding-bottom:3px;
  transition:color .2s var(--ease),border-color .2s var(--ease),gap .2s var(--ease);
}
.tier-link:hover{color:var(--copper);border-color:var(--copper);gap:12px}

/* ---------- compare table ---------- */
.table-wrap{
  background:var(--white);border:1px solid var(--card-line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-1);
}
.table-scroll{overflow-x:auto}
table.benefit-table{width:100%;border-collapse:collapse;min-width:760px}
.benefit-table thead th{
  position:sticky;top:0;z-index:3;background:var(--paper);
  font-size:13px;letter-spacing:.08em;font-weight:600;color:var(--t-mute);
  text-align:left;padding:18px 20px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.benefit-table thead th.col-top{color:var(--ink);background:#F2F6E6;position:relative}
.benefit-table thead th.col-top .rec{
  display:block;margin-top:8px;font-size:11px;letter-spacing:.1em;
  color:var(--ink);background:var(--lime);border-radius:var(--r-pill);
  padding:3px 10px;width:max-content;
}
.benefit-table tbody td{
  padding:16px 20px;font-size:15px;color:var(--t-body);
  border-bottom:1px solid var(--line);vertical-align:middle;
}
.benefit-table tbody tr:last-child td{border-bottom:none}
.benefit-table tbody tr:hover td{background:var(--paper)}
.benefit-table tbody td:first-child{font-weight:600;color:var(--ink)}
.benefit-table td.col-top{background:rgba(199,240,60,.09)}
.benefit-table tbody tr:hover td.col-top{background:rgba(199,240,60,.16)}
.cell-yes{color:var(--ink);font-weight:600}
.cell-yes i{color:var(--tier-green);margin-right:7px}
.cell-no{color:#B4B8BC}
.cell-top{color:var(--copper);font-weight:600}
.table-note{
  margin-top:18px;font-size:14px;color:var(--t-mute);
  display:flex;gap:10px;align-items:flex-start;
}
.table-note i{color:var(--copper);margin-top:6px}

/* ---------- choose ---------- */
.choose-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.choose-card{
  background:var(--white);border:1px solid var(--card-line);border-radius:var(--r-card);
  padding:28px 24px;transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.choose-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:rgba(21,23,26,.3)}
.choose-card .idx{
  font-size:12px;letter-spacing:.14em;color:var(--t-mute);font-weight:600;
}
.choose-card h3{margin-top:12px;font-size:19px}
.choose-card p{margin-top:12px;font-size:15px;color:var(--t-mute);line-height:1.8}
.choose-card .fit{
  display:inline-block;margin-top:18px;font-size:13px;color:var(--copper);
  border-top:1px solid var(--line);padding-top:12px;width:100%;
}

/* ---------- steps ---------- */
.steps{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  border-top:1px solid var(--line);
}
.step{
  padding:28px 24px 6px 0;position:relative;
}
.step + .step{padding-left:24px;border-left:1px solid var(--line)}
.step .num{
  font-size:34px;font-weight:700;color:var(--ink);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;line-height:1;
}
.step .num::after{content:'';display:block;width:34px;height:3px;background:var(--lime);margin-top:10px}
.step h3{margin-top:16px;font-size:18px}
.step p{margin-top:10px;font-size:15px;color:var(--t-mute)}

/* ---------- faq ---------- */
.faq-grid{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.faq-side{position:sticky;top:112px}
.faq-side h2{font-size:clamp(26px,2.4vw,34px)}
.faq-side p{margin-top:14px;color:var(--t-mute);font-size:16px}
.accordion-item{border:none;border-bottom:1px solid var(--line);background:transparent}
.accordion-button{
  background:transparent;color:var(--ink);font-size:17px;font-weight:700;
  padding:22px 46px 22px 0;box-shadow:none;border-radius:0!important;
}
.accordion-button:not(.collapsed){background:transparent;color:var(--ink)}
.accordion-button:focus{box-shadow:0 0 0 2px var(--lime)}
.accordion-button::after{
  width:16px;height:16px;background-size:16px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2315171A'%3E%3Cpath d='M8 11.6 2.4 5.7l1.2-1.1L8 9.2l4.4-4.6 1.2 1.1z'/%3E%3C/svg%3E");
  transition:transform .3s var(--ease);
}
.accordion-button:not(.collapsed)::after{transform:rotate(180deg)}
.accordion-body{padding:0 46px 26px 0;font-size:16px;color:var(--t-mute);line-height:1.85}

/* ---------- cta ---------- */
.cta-band{
  background:var(--ink-deep);color:var(--paper);
  background-image:linear-gradient(rgba(245,243,238,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(245,243,238,.05) 1px,transparent 1px);
  background-size:44px 44px,44px 44px;
}
.cta-band h2{color:var(--paper)}
.cta-band p{color:rgba(245,243,238,.72)}
.cta-grid{display:grid;grid-template-columns:1.35fr .95fr;gap:52px;align-items:center}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.cta-card{
  background:#131619;border:1px solid rgba(245,243,238,.14);border-radius:var(--r-card);
  padding:26px 24px;
}
.cta-card .k{font-size:12px;letter-spacing:.14em;color:var(--lime);font-weight:600}
.cta-card h3{color:var(--paper);font-size:20px;margin-top:12px}
.cta-card ul{margin-top:16px;display:grid;gap:10px}
.cta-card li{font-size:14.5px;color:rgba(245,243,238,.75);display:flex;gap:10px}
.cta-card li i{color:var(--lime);font-size:12px;margin-top:7px}
.cta-card .price{
  margin-top:20px;padding-top:18px;border-top:1px solid rgba(245,243,238,.14);
  display:flex;align-items:baseline;gap:10px;
}
.cta-card .price b{font-size:30px;color:var(--paper);font-variant-numeric:tabular-nums;letter-spacing:-.02em}
.cta-card .price span{font-size:13px;color:rgba(245,243,238,.6)}

/* ---------- footer ---------- */
.site-footer{background:var(--paper);border-top:1px solid var(--line);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:48px}
.footer-brand{display:flex;align-items:center;gap:10px}
.footer-desc{margin-top:18px;font-size:15px;color:var(--t-mute);max-width:34ch}
.footer-col h4{font-size:14px;letter-spacing:.06em;color:var(--ink);margin-bottom:18px}
.footer-col ul{display:grid;gap:11px}
.footer-col li a,.footer-col p{font-size:15px;color:var(--t-mute)}
.footer-col a:hover{color:var(--copper);padding-left:2px}
.footer-bottom{
  margin-top:56px;border-top:1px solid var(--line);
  padding:22px 0 30px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13.5px;color:var(--t-mute);
}
.footer-bottom a{color:var(--t-mute)}
.footer-bottom a:hover{color:var(--copper)}

/* ---------- responsive ---------- */
@media (max-width:1399.98px){:root{--shell:1140px}}
@media (max-width:1199.98px){
  :root{--shell:960px}
  .nav-side{gap:18px}
  .cat-hero__grid{gap:40px}
  .tier-row{gap:40px}
}
@media (max-width:991.98px){
  :root{--shell:100%;--nav-h:64px}
  .shell{padding:0 24px}
  .header-inner{display:none}
  .mobile-bar{
    display:grid;grid-template-columns:1fr auto 1fr;align-items:center;
    height:var(--nav-h);gap:12px;
  }
  .burger{
    justify-self:start;background:transparent;border:1px solid var(--line);
    border-radius:10px;width:42px;height:38px;display:flex;align-items:center;justify-content:center;
    color:var(--ink);font-size:16px;cursor:pointer;transition:border-color .2s var(--ease);
  }
  .burger:hover{border-color:var(--ink)}
  .mobile-bar .brand{justify-self:center}
  .mobile-bar .btn-ink{justify-self:end}
  .drawer{
    display:block;position:fixed;inset:0;z-index:1050;
    background:var(--paper);padding:22px 24px 40px;
    transform:translateX(-100%);transition:transform .3s var(--ease);
    overflow-y:auto;
  }
  .drawer.open{transform:translateX(0)}
  .drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:26px}
  .drawer-close{
    background:transparent;border:1px solid var(--line);border-radius:10px;
    width:42px;height:38px;color:var(--ink);font-size:17px;cursor:pointer;
  }
  .drawer-nav{display:grid;gap:0}
  .drawer-nav a{
    display:flex;align-items:baseline;gap:14px;
    font-size:22px;color:var(--ink);font-weight:600;
    padding:20px 0;border-bottom:1px solid var(--line);
  }
  .drawer-nav a i{font-style:normal;font-size:12px;color:var(--t-mute);letter-spacing:.12em}
  .drawer-nav a:hover{color:var(--copper)}
  .drawer-cta{margin-top:30px;width:100%}
  .cat-hero{padding:44px 0 64px}
  .cat-hero__grid{grid-template-columns:1fr;gap:40px}
  .section{padding:76px 0}
  .tier-row{grid-template-columns:1fr;gap:28px}
  .tier-row:nth-child(even) .tier-media{order:0}
  .tier-row + .tier-row{margin-top:56px;padding-top:56px}
  .faq-grid{grid-template-columns:1fr;gap:32px}
  .faq-side{position:static}
  .choose-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .step:nth-child(3){border-left:none;padding-left:0}
  .step:nth-child(n+3){border-top:1px solid var(--line);padding-top:26px}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .shell{padding:0 18px}
  .section{padding:56px 0}
  .cat-hero h1{font-size:29px}
  .big-num{font-size:62px}
  .cat-hero__numrow{flex-direction:column;gap:14px}
  .scale-list{grid-template-columns:1fr 1fr;padding:18px 18px 20px}
  .choose-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step + .step{border-left:none;padding-left:0;border-top:1px solid var(--line);padding-top:24px}
  .table-scroll{overflow-x:visible;min-width:0}
  table.benefit-table{min-width:0;display:block}
  .benefit-table thead{display:none}
  .benefit-table tbody{display:block;padding:6px 0}
  .benefit-table tbody tr{
    display:block;border-bottom:1px solid var(--line);padding:18px 18px 8px;
  }
  .benefit-table tbody tr:last-child{border-bottom:none}
  .benefit-table tbody td{
    display:flex;justify-content:space-between;gap:16px;
    border-bottom:none;padding:8px 0;font-size:14.5px;
  }
  .benefit-table tbody td::before{
    content:attr(data-label);color:var(--t-mute);font-size:13px;flex:0 0 auto;
  }
  .benefit-table tbody td:first-child{
    font-size:16px;border-bottom:1px dashed var(--line);padding-bottom:12px;margin-bottom:6px;
  }
  .benefit-table tbody td:first-child::before{display:none}
  .benefit-table td.col-top{background:rgba(199,240,60,.1);border-radius:8px;padding:8px 10px}
  .cta-actions .btn-lime,.cta-actions .btn-ghost{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:30px}
}
@media (max-width:575.98px){
  .shell{padding:0 16px}
  .cat-hero h1{font-size:26px}
  .choose-card{padding:22px 18px}
  .faq-side h2{font-size:24px}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}

/* roulang page: category3 */
:root{
  --ink:#15171A;
  --ink-deep:#0C0E10;
  --paper:#F5F3EE;
  --paper-alt:#EFEDE7;
  --white:#FFFFFF;
  --lime:#C7F03C;
  --copper:#C9631F;
  --text:#3A3F45;
  --muted:#7B8086;
  --line:#E4E0D7;
  --border:#E8E4DA;
  --r-btn:10px;
  --r-card:16px;
  --shadow-sm:0 1px 2px rgba(21,23,26,.04);
  --shadow-md:0 10px 24px rgba(21,23,26,.08);
  --shell:1280px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --bs-body-font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
  --bs-body-bg:#F5F3EE;
  --bs-body-color:#3A3F45;
  --bs-link-color:#15171A;
  --bs-link-hover-color:#C9631F;
  --bs-border-color:#E8E4DA;
}

*,*::before,*::after{box-sizing:border-box}

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  padding-top:76px;
  background:var(--paper);
  color:var(--text);
  font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC',system-ui,sans-serif;
  font-size:17px;
  line-height:1.85;
  letter-spacing:.01em;
  overflow-x:hidden;
}

img{max-width:100%;display:block;border-radius:var(--r-card)}
a{color:var(--ink);text-decoration:none}
a:hover{color:var(--copper)}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0 0 1em}
h1,h2,h3,h4{margin:0;color:var(--ink);line-height:1.24;font-weight:700}
button{font-family:inherit}

:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px}

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

/* ---------- header ---------- */
.site-header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:1030;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-stuck{
  background:rgba(245,243,238,.94);
  border-bottom:1px solid var(--line);
  box-shadow:0 1px 2px rgba(21,23,26,.04);
}
.nav-shell{
  position:relative;
  height:76px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.nav-side{display:flex;align-items:center;gap:28px;flex:1 1 0;min-width:0}
.nav-right{justify-content:flex-end}
.nav-a{
  position:relative;
  font-size:15px;
  font-weight:500;
  color:var(--ink);
  padding:6px 0;
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.nav-a::after{
  content:"";
  position:absolute;
  left:0;bottom:0;
  width:100%;height:2px;
  background:var(--ink);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.nav-a:hover{color:var(--copper)}
.nav-a:hover::after{background:var(--copper);transform:scaleX(1)}
.nav-a.active{font-weight:700}
.nav-a.active::after{transform:scaleX(1)}

.brand{
  position:absolute;
  left:50%;
  transform:translateX(-50%);
  display:flex;
  align-items:center;
  gap:10px;
  white-space:nowrap;
}
.brand-mark{display:inline-flex;line-height:0}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:16px;font-weight:800;color:var(--ink);letter-spacing:.02em}
.brand-text i{font-style:normal;font-size:11px;letter-spacing:.14em;color:var(--muted)}

.btn-join{
  display:inline-flex;
  align-items:center;
  height:42px;
  padding:0 20px;
  border-radius:var(--r-btn);
  background:var(--ink);
  color:var(--paper);
  font-size:14px;
  font-weight:700;
  letter-spacing:.02em;
  transition:background .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-join:hover{
  background:var(--ink-deep);
  color:var(--paper);
  transform:translateY(-2px);
  box-shadow:var(--shadow-md);
}

.nav-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px;height:42px;
  border:1px solid var(--border);
  border-radius:var(--r-btn);
  background:var(--white);
  color:var(--ink);
  cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.nav-toggle:hover{border-color:var(--ink)}

/* ---------- mobile drawer ---------- */
.drawer{
  position:fixed;
  inset:0;
  z-index:1040;
  background:var(--paper);
  padding:88px 24px 40px;
  transform:translateY(-8px);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
  overflow-y:auto;
}
.drawer.is-open{opacity:1;visibility:visible;transform:none}
.drawer-close{
  position:absolute;
  top:16px;right:20px;
  width:44px;height:44px;
  border:1px solid var(--border);
  border-radius:var(--r-btn);
  background:var(--white);
  color:var(--ink);
  font-size:20px;
  cursor:pointer;
}
.drawer-group{margin-bottom:8px}
.drawer-label{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
  text-transform:uppercase;
  padding:20px 0 10px;
  border-top:1px solid var(--line);
}
.drawer-link{
  display:flex;
  align-items:baseline;
  gap:14px;
  padding:16px 0;
  font-size:22px;
  font-weight:700;
  color:var(--ink);
  border-bottom:1px solid var(--line);
}
.drawer-link span{font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--copper)}
.drawer-link.active{color:var(--copper)}
.drawer-cta{margin-top:32px;display:flex;flex-direction:column;gap:12px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:50px;
  padding:0 26px;
  border:1px solid transparent;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:700;
  letter-spacing:.02em;
  cursor:pointer;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
}
.btn:focus-visible{outline:2px solid var(--lime);outline-offset:2px}
.btn-ink{background:var(--ink);color:var(--paper)}
.btn-ink:hover{background:var(--ink-deep);color:var(--paper);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-lime{background:var(--lime);color:var(--ink)}
.btn-lime:hover{background:#d3f75e;color:var(--ink);transform:translateY(-2px);box-shadow:var(--shadow-md)}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-outline:hover{background:var(--ink);color:var(--paper);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--paper);border-color:rgba(245,243,238,.55)}
.btn-ghost:hover{background:var(--paper);color:var(--ink);transform:translateY(-2px)}

/* ---------- page head ---------- */
.page-head{
  background:var(--paper);
  border-bottom:1px solid var(--line);
  padding:36px 0 56px;
}
.crumbs{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:13px;
  color:var(--muted);
  margin-bottom:28px;
}
.crumbs a{color:var(--muted)}
.crumbs a:hover{color:var(--copper)}
.crumbs .sep{color:#C4C0B7}
.crumbs .now{color:var(--ink);font-weight:600}

.head-inner{max-width:900px;margin:0 auto}
.badge-copper{
  display:inline-flex;
  align-items:center;
  height:28px;
  padding:0 14px;
  border:1px solid rgba(201,99,31,.35);
  border-radius:999px;
  background:rgba(201,99,31,.08);
  color:var(--copper);
  font-size:12px;
  font-weight:700;
  letter-spacing:.12em;
}
.page-head h1{
  margin:20px 0 18px;
  font-size:clamp(30px,4vw,52px);
  font-weight:800;
  line-height:1.16;
  letter-spacing:-.01em;
}
.page-head .lede{
  font-size:17px;
  line-height:1.9;
  color:var(--text);
  max-width:760px;
  margin:0;
}
.head-meta{
  display:flex;
  flex-wrap:wrap;
  gap:12px 34px;
  margin-top:30px;
  padding-top:22px;
  border-top:1px solid var(--line);
}
.head-meta li{font-size:13px;color:var(--muted);letter-spacing:.04em}
.head-meta li b{display:block;font-size:15px;color:var(--ink);font-weight:700;letter-spacing:0;margin-top:2px}

/* ---------- doc layout ---------- */
.doc-wrap{padding:64px 0 96px}
.doc-layout{
  display:grid;
  grid-template-columns:216px minmax(0,1fr);
  gap:56px;
  max-width:1080px;
  margin:0 auto;
}
.toc{
  position:sticky;
  top:104px;
  align-self:start;
  padding-bottom:12px;
}
.toc-title{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
  font-weight:700;
  margin-bottom:18px;
  text-transform:uppercase;
}
.toc-list li{border-top:1px solid var(--line)}
.toc-list a{
  display:flex;
  gap:10px;
  align-items:baseline;
  padding:11px 0 11px 12px;
  border-left:2px solid transparent;
  font-size:14px;
  color:var(--muted);
  line-height:1.5;
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.toc-list a span{font-size:11px;font-weight:700;letter-spacing:.08em;color:#A9AEB4}
.toc-list a:hover{color:var(--ink);background:var(--paper-alt)}
.toc-list a.is-active{
  color:var(--ink);
  font-weight:700;
  border-left-color:var(--copper);
  background:var(--paper-alt);
}
.toc-list a.is-active span{color:var(--copper)}

.doc-sec{
  padding-bottom:52px;
  margin-bottom:52px;
  border-bottom:1px solid var(--line);
  scroll-margin-top:104px;
}
.doc-sec:last-of-type{border-bottom:0;margin-bottom:0}
.doc-sec h2{
  position:relative;
  padding-left:18px;
  font-size:clamp(23px,2.2vw,30px);
  font-weight:800;
  margin-bottom:20px;
  letter-spacing:-.005em;
}
.doc-sec h2::before{
  content:"";
  position:absolute;
  left:0;
  top:.18em;
  bottom:.18em;
  width:3px;
  border-radius:2px;
  background:var(--lime);
}
.sec-idx{
  display:block;
  font-size:12px;
  font-weight:700;
  letter-spacing:.16em;
  color:var(--copper);
  margin-bottom:6px;
}
.doc-sec p{font-size:17px;line-height:1.9;color:var(--text)}

.dot-list{margin:18px 0 4px}
.dot-list li{
  position:relative;
  padding:9px 0 9px 22px;
  font-size:16px;
  line-height:1.8;
  color:var(--text);
  border-bottom:1px dashed var(--line);
}
.dot-list li:last-child{border-bottom:0}
.dot-list li::before{
  content:"";
  position:absolute;
  left:0;top:19px;
  width:8px;height:8px;
  background:var(--copper);
  border-radius:1px;
}

.quote{
  margin:24px 0;
  padding:20px 24px;
  border-left:3px solid var(--copper);
  background:var(--paper-alt);
  border-radius:0 var(--r-card) var(--r-card) 0;
  font-size:16px;
  line-height:1.85;
  color:var(--text);
}
.quote b{color:var(--ink)}

.doc-figure{margin:28px 0 12px}
.doc-figure img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
  border:1px solid var(--border);
  box-shadow:var(--shadow-sm);
}
.doc-figure figcaption{
  margin-top:12px;
  text-align:center;
  font-size:13px;
  color:var(--muted);
}

/* ---------- table ---------- */
.table-wrap{
  margin:24px 0 8px;
  border:1px solid var(--border);
  border-radius:var(--r-card);
  background:var(--white);
  overflow-x:auto;
  box-shadow:var(--shadow-sm);
}
.cmp-table{
  width:100%;
  min-width:620px;
  border-collapse:collapse;
  font-size:15px;
}
.cmp-table th,.cmp-table td{
  padding:16px 18px;
  text-align:left;
  border-bottom:1px solid var(--line);
  white-space:nowrap;
}
.cmp-table thead th{
  font-size:12px;
  letter-spacing:.08em;
  font-weight:700;
  color:var(--muted);
  background:var(--paper-alt);
}
.cmp-table tbody tr:last-child td{border-bottom:0}
.cmp-table tbody tr{transition:background .2s var(--ease)}
.cmp-table tbody tr:hover{background:var(--paper)}
.cmp-table td:first-child{color:var(--ink);font-weight:600}
.cmp-table td.hi{color:var(--copper);font-weight:700}
.table-note{font-size:13px;color:var(--muted);margin-top:10px}

/* ---------- FAQ ---------- */
.faq{margin-top:8px}
.faq .accordion-item{
  background:transparent;
  border:0;
  border-top:1px solid var(--line);
  border-radius:0;
}
.faq .accordion-item:last-child{border-bottom:1px solid var(--line)}
.faq .accordion-header{margin:0}
.faq .accordion-button{
  background:transparent;
  color:var(--ink);
  font-size:17px;
  font-weight:700;
  line-height:1.6;
  padding:22px 44px 22px 0;
  border-radius:0;
  box-shadow:none;
  transition:color .2s var(--ease);
}
.faq .accordion-button:hover{color:var(--copper)}
.faq .accordion-button:not(.collapsed){
  background:transparent;
  color:var(--ink);
  box-shadow:none;
}
.faq .accordion-button:focus,
.faq .accordion-button:focus-visible{
  box-shadow:none;
  outline:2px solid var(--lime);
  outline-offset:2px;
  z-index:2;
}
.faq .accordion-button::after{
  width:16px;height:16px;
  background-size:16px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='M3 6l5 5 5-5' fill='none' stroke='%23C9631F' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  transition:transform .3s var(--ease);
}
.faq .accordion-button:not(.collapsed)::after{transform:rotate(180deg)}
.faq .accordion-body{
  padding:0 0 24px;
  font-size:16px;
  line-height:1.85;
  color:var(--muted);
}
.faq .accordion-body strong{color:var(--ink)}

/* ---------- CTA strip ---------- */
.cta-strip{
  background:var(--ink-deep);
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:34px 34px;
  padding:48px 0;
  color:var(--paper);
}
.cta-strip__inner{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.cta-strip h2{
  color:var(--paper);
  font-size:clamp(21px,2.2vw,28px);
  font-weight:800;
  margin-bottom:8px;
  letter-spacing:-.005em;
}
.cta-strip p{margin:0;color:rgba(245,243,238,.72);font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}

/* ---------- footer ---------- */
.site-footer{
  background:var(--paper);
  border-top:1px solid var(--line);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.3fr;
  gap:40px;
  padding:72px 0 48px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:18px}
.footer-brand .brand-text b{font-size:16px}
.footer-desc{font-size:14px;line-height:1.8;color:var(--muted);margin:0;max-width:320px}
.footer-col h4{
  font-size:12px;
  letter-spacing:.14em;
  color:var(--muted);
  font-weight:700;
  margin-bottom:18px;
  text-transform:uppercase;
}
.footer-col ul li{margin-bottom:10px}
.footer-col ul a{
  display:inline-block;
  font-size:14px;
  color:var(--ink);
  transition:color .2s var(--ease),transform .2s var(--ease);
}
.footer-col ul a:hover{color:var(--copper);transform:translateX(2px)}
.footer-col p{font-size:14px;line-height:1.8;color:var(--muted);margin:0}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:22px 0;
  border-top:1px solid var(--line);
  font-size:13px;
  color:var(--muted);
}
.footer-bottom a{color:var(--ink);font-weight:600}
.footer-bottom a:hover{color:var(--copper)}

/* ---------- reveal ---------- */
.js .reveal{opacity:0;transform:translateY(12px)}
.js .reveal.is-in{
  opacity:1;
  transform:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}

/* ---------- responsive ---------- */
@media (max-width:1399.98px){
  :root{--shell:1140px}
}
@media (max-width:1199.98px){
  :root{--shell:960px}
  .nav-side{gap:20px}
}
@media (max-width:991.98px){
  body{padding-top:64px}
  .shell{padding:0 24px}
  .nav-shell{
    display:grid;
    grid-template-columns:1fr auto 1fr;
    align-items:center;
    height:64px;
  }
  .nav-toggle{display:inline-flex;justify-self:start}
  .nav-left{display:none}
  .brand{position:static;transform:none;justify-self:center;max-width:60vw}
  .brand-text b{font-size:15px}
  .brand-text i{font-size:10px;letter-spacing:.1em}
  .nav-right{justify-self:end;flex:0 0 auto;gap:0}
  .nav-right .nav-a{display:none}
  .nav-right .btn-join{height:38px;padding:0 16px;font-size:13px}
  .page-head{padding:28px 0 44px}
  .doc-wrap{padding:48px 0 72px}
  .doc-layout{grid-template-columns:1fr;gap:36px;max-width:900px}
  .toc{position:static}
  .toc-list{display:flex;flex-wrap:wrap;gap:8px;border:0}
  .toc-list li{border:0}
  .toc-list a{
    border:1px solid var(--border);
    border-radius:999px;
    background:var(--white);
    padding:7px 14px;
    font-size:13px;
  }
  .toc-list a.is-active{border-color:var(--ink);background:var(--paper-alt)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:36px;padding:56px 0 36px}
  .cta-strip{padding:40px 0}
}
@media (max-width:767.98px){
  body{font-size:16px}
  .page-head h1{font-size:clamp(26px,7vw,34px)}
  .page-head .lede{font-size:16px}
  .head-meta{gap:10px 24px}
  .doc-sec{padding-bottom:40px;margin-bottom:40px}
  .doc-sec p{font-size:16px}
  .cta-strip__inner{flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:48px 0 32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:575.98px){
  .shell{padding:0 16px}
  .cta-actions{flex-direction:column}
  .cta-actions .btn{width:100%}
  .doc-sec h2{font-size:22px}
  .cmp-table th,.cmp-table td{padding:14px 14px}
  .table-wrap{border-radius:14px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
  }
  .js .reveal{opacity:1;transform:none}
}