/* roulang page: index */
:root{
  --brand:#E2452B;
  --brand-hover:#C93A22;
  --brand-active:#AE3019;
  --brand-soft:#FDEDE9;
  --brand-line:#F3C7BE;
  --ink:#16222B;
  --ink-2:#22323D;
  --text:#16222B;
  --text-2:#4E5A63;
  --text-3:#8A9399;
  --bg:#F7F6F3;
  --bg-alt:#F0EFEA;
  --card:#FFFFFF;
  --line:#E5E2DB;
  --line-dark:rgba(255,255,255,.10);
  --tier-basic:#9AA6AD;
  --tier-plus:#0FA98C;
  --tier-pro:#D9A227;
  --tier-flag:#16222B;
  --r-s:10px;
  --r-m:14px;
  --r-l:20px;
  --shadow-s:0 1px 2px rgba(22,34,43,.06),0 8px 24px -14px rgba(22,34,43,.20);
  --shadow-h:0 10px 30px -12px rgba(22,34,43,.28);
  --nav-w:232px;
}
*,*::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,sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
table{border-collapse:separate;border-spacing:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ---------- 布局骨架 ---------- */
.sidenav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--nav-w);
  background:var(--ink);
  border-right:1px solid var(--line-dark);
  display:flex;
  flex-direction:column;
  padding:24px 20px;
  z-index:60;
}
.shell{
  margin-left:var(--nav-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
}
.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding:0 40px;
}

/* ---------- 品牌 ---------- */
.brand{display:flex;align-items:center;gap:10px}
.brand__mark{
  flex:0 0 24px;
  width:24px;height:24px;
  background:var(--brand);
  clip-path:polygon(0 0,100% 0,100% 72%,72% 100%,0 100%);
}
.brand__text{
  color:#fff;
  font-size:19px;
  font-weight:800;
  letter-spacing:.2px;
  white-space:nowrap;
}
.brand__sub{
  margin-top:8px;
  font-size:12px;
  color:rgba(255,255,255,.42);
  letter-spacing:.4px;
}

/* ---------- 侧栏菜单 ---------- */
.sidenav__nav{
  margin-top:28px;
  flex:1 1 auto;
  overflow-y:auto;
  overflow-x:hidden;
}
.nav-group{margin-bottom:22px}
.nav-group__title{
  font-size:12px;
  letter-spacing:1px;
  color:rgba(255,255,255,.42);
  margin:0 0 10px 10px;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:12px;
  min-height:44px;
  padding:0 12px;
  border-radius:8px;
  color:rgba(255,255,255,.78);
  font-size:15px;
  transition:background .18s ease,color .18s ease;
}
.nav-item__icon{width:18px;text-align:center;font-size:15px;flex:0 0 18px}
.nav-item__mini{display:none;font-size:10px;line-height:1.2}
.nav-item:hover{background:rgba(255,255,255,.07);color:#fff}
.nav-item.is-active{background:rgba(226,69,43,.16);color:#fff}
.nav-item.is-active::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  transform:translateY(-50%);
  width:3px;height:22px;
  border-radius:2px;
  background:var(--brand);
}
.sidenav__foot{
  border-top:1px solid var(--line-dark);
  padding-top:18px;
  margin-top:12px;
}
.sidenav__note{
  margin-top:10px;
  font-size:12px;
  color:rgba(255,255,255,.42);
  text-align:center;
}
.nav-toggle{
  display:none;
  width:40px;height:40px;
  border:0;background:transparent;
  padding:8px;
  cursor:pointer;
  border-radius:8px;
}
.nav-toggle span{
  display:block;
  height:2px;
  background:#F5F4F1;
  border-radius:2px;
  margin:5px 0;
  transition:transform .2s ease,opacity .2s ease;
}
.sidenav.is-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.sidenav.is-open .nav-toggle span:nth-child(2){opacity:0}
.sidenav.is-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.nav-panel__cta{display:none}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:40px;
  padding:0 18px;
  border:1px solid transparent;
  border-radius:var(--r-s);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.btn--lg{height:48px;padding:0 24px;font-size:16px}
.btn--sm{height:34px;padding:0 14px;font-size:14px}
.btn--block{width:100%}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 12px 26px -14px rgba(226,69,43,.85)}
.btn--primary:active{background:var(--brand-active);transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn--ghost:hover{background:rgba(22,34,43,.06)}
.btn--ghost:active{background:rgba(22,34,43,.1)}
.btn--light{background:#F5F4F1;color:var(--ink)}
.btn--light:hover{background:#fff;transform:translateY(-1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed}
.link{color:var(--brand);font-weight:600}
.link:hover{text-decoration:underline;text-underline-offset:3px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--text-3);font-size:13px;font-weight:600;transition:color .18s ease}
.link-arrow:hover{color:var(--brand)}

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:
    repeating-linear-gradient(0deg,rgba(22,34,43,.04) 0 1px,transparent 1px 28px),
    repeating-linear-gradient(90deg,rgba(22,34,43,.04) 0 1px,transparent 1px 28px),
    var(--bg);
  overflow:hidden;
}
.hero__grid{
  display:grid;
  grid-template-columns:7fr 5fr;
  gap:48px;
  align-items:center;
  min-height:520px;
  padding-top:72px;
  padding-bottom:72px;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:13px;
  font-weight:600;
  color:var(--text-2);
  letter-spacing:.4px;
}
.eyebrow__dot{width:8px;height:8px;background:var(--brand);display:inline-block}
.hero__title{
  margin-top:16px;
  font-size:38px;
  line-height:1.3;
  font-weight:800;
  letter-spacing:-.2px;
  color:var(--ink);
}
.hero__rule{
  width:120px;height:6px;
  margin:18px 0 16px;
  background:var(--brand);
  transform:skewX(-20deg);
}
.hero__sub{
  font-size:18px;
  line-height:1.75;
  color:var(--text-2);
  max-width:520px;
}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  height:32px;
  padding:0 14px;
  border-radius:999px;
  background:var(--bg-alt);
  color:var(--text-2);
  font-size:14px;
}
.badge i{color:var(--brand);font-size:13px}
.hero__media{position:relative}
.hero__media::before{
  content:"";
  position:absolute;
  right:-14px;bottom:-14px;
  width:62%;height:62%;
  border-radius:12px;
  background:var(--brand-soft);
  border:1px solid var(--brand-line);
}
.hero__media img{
  position:relative;
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:12px;
  box-shadow:var(--shadow-s);
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section--alt{background:var(--bg-alt)}
.section--tight{padding:64px 0}
.section__head{max-width:760px;margin-bottom:40px}
.section__index{
  font-size:12px;
  letter-spacing:1.4px;
  color:var(--text-3);
  margin-bottom:10px;
}
.section__title{
  font-size:28px;
  line-height:1.35;
  font-weight:700;
  color:var(--ink);
  padding-left:14px;
  border-left:3px solid var(--brand);
}
.section__desc{margin-top:14px;font-size:16px;line-height:1.85;color:var(--text-2)}
.section__foot{display:flex;justify-content:flex-end;margin-top:28px}

/* ---------- 信任条 ---------- */
.stats__list{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  background:var(--bg-alt);
  border-radius:var(--r-l);
  padding:32px 28px;
}
.stats__item{border-left:1px solid var(--line);padding-left:20px}
.stats__item:first-child{border-left:0;padding-left:0}
.stats__num{
  display:block;
  font-size:30px;
  font-weight:700;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
  line-height:1.2;
}
.stats__label{display:block;margin-top:6px;font-size:14px;color:var(--text-3);line-height:1.6}

/* ---------- 对比表 ---------- */
.table-wrap{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  box-shadow:var(--shadow-s);
  overflow:auto;
  max-height:620px;
}
table.compare{width:100%;min-width:780px}
.compare thead th{
  position:sticky;top:0;z-index:2;
  background:var(--bg-alt);
  padding:16px 18px;
  font-size:16px;
  font-weight:700;
  color:var(--ink);
  text-align:center;
  border-bottom:1px solid var(--line);
}
.compare thead th:first-child{text-align:left;left:0;z-index:3}
.compare tbody td{
  height:56px;
  padding:0 18px;
  font-size:15px;
  line-height:1.6;
  color:var(--text-2);
  text-align:center;
  border-bottom:1px solid var(--line);
}
.compare tbody td:first-child{
  text-align:left;
  color:var(--ink);
  font-weight:600;
  position:sticky;left:0;z-index:1;
  background:var(--card);
}
.compare tbody tr:nth-child(even) td{background:#FAF9F6}
.compare tbody tr:last-child td{border-bottom:0}
.tick{font-size:15px;font-weight:700;display:inline-block}
.tick--basic{color:var(--tier-basic)}
.tick--plus{color:var(--tier-plus)}
.tick--pro{color:var(--tier-pro)}
.tick--flag{color:var(--tier-flag)}
.none{color:var(--text-3);font-size:14px}
.table__note{margin-top:14px;font-size:13px;color:var(--text-3)}
.compare-cards{display:none}

/* ---------- 等级卡 ---------- */
.tiers__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.tier-card{
  position:relative;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:24px;
  box-shadow:var(--shadow-s);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
  display:flex;
  flex-direction:column;
}
.tier-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-h);border-color:var(--brand-line)}
.tier-card::before{
  content:"";
  position:absolute;top:0;left:0;right:0;height:4px;
  border-radius:var(--r-m) var(--r-m) 0 0;
}
.tier-card--basic::before{background:var(--tier-basic)}
.tier-card--plus::before{background:var(--tier-plus)}
.tier-card--pro::before{background:var(--tier-pro)}
.tier-card--flag::before{background:var(--tier-flag)}
.tier-card--pro{border:2px solid var(--tier-pro)}
.tier-card__flag{
  position:absolute;
  top:14px;right:14px;
  font-size:12px;
  font-weight:700;
  color:#fff;
  background:var(--brand);
  border-radius:999px;
  padding:3px 10px;
}
.tier-card__name{font-size:17px;font-weight:700;color:var(--ink);margin-top:8px}
.tier-card__price{
  margin-top:16px;
  font-size:32px;
  font-weight:700;
  color:var(--ink);
  font-variant-numeric:tabular-nums;
  line-height:1.1;
}
.tier-card__price span{font-size:12px;font-weight:400;color:var(--text-3);margin-left:4px}
.tier-card__list{margin:18px 0 22px;display:flex;flex-direction:column;gap:10px}
.tier-card__list li{display:flex;gap:10px;font-size:15px;color:var(--text-2);line-height:1.6}
.tier-card__list i{flex:0 0 16px;font-size:13px;margin-top:5px}
.tier-card__list .i-basic{color:var(--tier-basic)}
.tier-card__list .i-plus{color:var(--tier-plus)}
.tier-card__list .i-pro{color:var(--tier-pro)}
.tier-card__list .i-flag{color:var(--brand)}
.tier-card .btn{margin-top:auto}

/* ---------- 内容卡 ---------- */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  overflow:hidden;
  box-shadow:var(--shadow-s);
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-h);border-color:var(--brand-line)}
.post-card__media{position:relative;display:block}
.post-card__media img{
  width:100%;
  aspect-ratio:16/10;
  object-fit:cover;
  border-radius:13px 13px 0 0;
}
.post-card__lock{
  position:absolute;
  right:12px;bottom:12px;
  width:26px;height:26px;
  border-radius:50%;
  background:rgba(22,34,43,.9);
  color:#F5F4F1;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:11px;
}
.post-card__veil{
  position:absolute;inset:0;
  background:rgba(22,34,43,.32);
  border-radius:13px 13px 0 0;
}
.post-card__body{padding:22px 24px 24px;display:flex;flex-direction:column;flex:1 1 auto}
.chip{
  align-self:flex-start;
  font-size:12px;
  font-weight:600;
  color:var(--brand);
  background:var(--brand-soft);
  border:1px solid var(--brand-line);
  border-radius:999px;
  padding:3px 12px;
}
.post-card__title{
  margin-top:12px;
  font-size:17px;
  font-weight:600;
  line-height:1.5;
  color:var(--ink);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.post-card__title a:hover{color:var(--brand)}
.post-card__excerpt{
  margin-top:10px;
  font-size:14px;
  line-height:1.8;
  color:var(--text-2);
  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;
  gap:12px;
  font-size:13px;
  color:var(--text-3);
}
.post-card--locked .post-card__title,
.post-card--locked .post-card__excerpt{opacity:.72}

/* ---------- 骨架与空态 ---------- */
.skeleton{
  background:#EDEBE6;
  border-radius:8px;
  animation:pulse 1.4s ease-in-out infinite;
}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.55}}
.empty{
  text-align:center;
  padding:56px 24px;
  background:var(--card);
  border:1px dashed var(--line);
  border-radius:var(--r-m);
}
.empty__icon{
  width:64px;height:64px;
  margin:0 auto 18px;
  border-radius:50%;
  background:var(--bg-alt);
  color:var(--text-3);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:22px;
}
.empty__text{font-size:16px;color:var(--text-2)}
.empty .btn{margin-top:20px}

/* ---------- FAQ ---------- */
.faq{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  box-shadow:var(--shadow-s);
  overflow:hidden;
}
.faq__item{border-bottom:1px solid var(--line)}
.faq__item:last-child{border-bottom:0}
.faq__q{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  min-height:60px;
  padding:14px 24px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  cursor:pointer;
  list-style:none;
}
.faq__q::-webkit-details-marker{display:none}
.faq__icon{position:relative;flex:0 0 24px;width:24px;height:24px}
.faq__icon::before,.faq__icon::after{
  content:"";
  position:absolute;
  background:var(--brand);
  border-radius:2px;
}
.faq__icon::before{left:0;top:11px;width:24px;height:2px}
.faq__icon::after{left:11px;top:0;width:2px;height:24px;transition:transform .22s ease}
.faq__item[open] .faq__icon::after{transform:rotate(90deg) scaleY(0)}
.faq__a{
  padding:0 24px 20px;
  background:#FAF9F6;
  font-size:15px;
  line-height:1.85;
  color:var(--text-2);
}

/* ---------- CTA ---------- */
.cta{
  position:relative;
  background:var(--ink);
  border-radius:var(--r-l);
  padding:56px 48px;
  overflow:hidden;
}
.cta::after{
  content:"";
  position:absolute;
  top:-30%;right:-6%;
  width:34%;height:170%;
  background:var(--brand);
  opacity:.92;
  transform:rotate(-6deg);
}
.cta__inner{position:relative;z-index:1;max-width:640px}
.cta__title{font-size:28px;line-height:1.35;font-weight:700;color:#F5F4F1}
.cta__desc{margin-top:12px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.66)}
.cta__actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px;margin-top:28px}
.cta__link{color:rgba(255,255,255,.66);font-size:13px;font-weight:600}
.cta__link:hover{color:#fff}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:auto;
  background:var(--ink);
  border-top:1px solid var(--line-dark);
  padding:64px 0 0;
}
.footer__grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
}
.footer__brand .brand__text{font-size:18px}
.footer__desc{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.66)}
.footer__contact{margin-top:18px;display:flex;flex-direction:column;gap:8px;font-size:14px;color:rgba(255,255,255,.66)}
.footer__contact i{color:var(--brand);margin-right:8px}
.footer__title{font-size:15px;font-weight:700;color:#F5F4F1;margin-bottom:16px}
.footer__links{display:flex;flex-direction:column;gap:12px}
.footer__links a{
  font-size:15px;
  color:rgba(255,255,255,.66);
  border-left:2px solid transparent;
  padding-left:0;
  transition:color .18s ease,padding-left .18s ease,border-color .18s ease;
}
.footer__links a:hover{color:#fff;padding-left:8px;border-left-color:var(--brand)}
.footer__bottom{
  margin-top:48px;
  border-top:1px solid var(--line-dark);
  padding:20px 0 28px;
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.42);
}

/* ---------- 平板 1024–1279 ---------- */
@media (max-width:1279px) and (min-width:1024px){
  :root{--nav-w:72px}
  .sidenav{padding:20px 12px;align-items:center}
  .brand__text,.brand__sub{display:none}
  .brand__mark{flex:0 0 26px;width:26px;height:26px}
  .nav-group__title{display:none}
  .nav-item{
    flex-direction:column;
    justify-content:center;
    gap:4px;
    padding:6px 2px;
    min-height:56px;
    text-align:center;
  }
  .nav-item__text{display:none}
  .nav-item__mini{display:block}
  .nav-item__icon{font-size:16px}
  .sidenav__note{display:none}
  .hero__grid{gap:32px}
}

/* ---------- 移动 ≤1023 ---------- */
@media (max-width:1023px){
  .sidenav{
    top:0;left:0;right:0;bottom:auto;
    width:auto;
    height:56px;
    flex-direction:row;
    align-items:center;
    justify-content:space-between;
    padding:0 16px;
    border-right:0;
    border-bottom:1px solid var(--line-dark);
  }
  body.is-scrolled .sidenav{
    background:rgba(22,34,43,.95);
    box-shadow:0 8px 20px -12px rgba(0,0,0,.75);
  }
  .brand__sub{display:none}
  .brand__text{font-size:16px}
  .nav-toggle{display:block}
  .sidenav__foot{display:none}
  .sidenav__nav{
    position:absolute;
    top:56px;left:0;right:0;
    margin:0;
    background:var(--ink);
    max-height:0;
    overflow:hidden;
    transition:max-height .24s ease-out;
    padding:0 16px;
    flex:none;
  }
  .sidenav.is-open .sidenav__nav{
    max-height:min(72vh,560px);
    overflow-y:auto;
    padding:8px 16px 20px;
  }
  .nav-group__title{padding-left:0;margin-left:0}
  .nav-item{min-height:48px;font-size:17px;border-bottom:1px solid rgba(255,255,255,.08);border-radius:0}
  .nav-item.is-active{color:var(--brand);background:transparent}
  .nav-item.is-active::before{display:none}
  .nav-panel__cta{display:block;margin-top:20px}
  .shell{margin-left:0;padding-top:56px}
  .section{padding:64px 0}
  .hero__grid{grid-template-columns:1fr;gap:32px;min-height:auto;padding-top:48px;padding-bottom:48px}
  .hero__title{font-size:30px}
  .stats__list{grid-template-columns:repeat(2,1fr);gap:20px}
  .stats__item:nth-child(3){border-left:0;padding-left:0}
  .tiers__grid{grid-template-columns:repeat(2,1fr)}
  .cards{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta{padding:44px 32px}
  .cta::after{width:26%;opacity:.7}
}

/* ---------- 手机 ≤767 ---------- */
@media (max-width:767px){
  .container{padding:0 20px}
  .section{padding:52px 0}
  .hero__title{font-size:28px}
  .hero__sub{font-size:16px}
  .hero__actions .btn{flex:1 1 100%}
  .section__title{font-size:22px}
  .table-wrap{display:none}
  .compare-cards{display:grid;gap:16px}
  .compare-card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-m);
    padding:20px;
    box-shadow:var(--shadow-s);
  }
  .compare-card__head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
  .compare-card__name{font-size:17px;font-weight:700;color:var(--ink)}
  .compare-card__tag{font-size:12px;color:var(--text-3)}
  .compare-card__row{
    display:flex;
    justify-content:space-between;
    gap:14px;
    padding:10px 0;
    border-bottom:1px dashed var(--line);
    font-size:15px;
    color:var(--text-2);
  }
  .compare-card__row:last-child{border-bottom:0}
  .compare-card__row b{font-weight:600;color:var(--text-2)}
  .tiers__grid{grid-template-columns:1fr}
  .cards{grid-template-columns:1fr}
  .stats__list{grid-template-columns:repeat(2,1fr);padding:24px 20px}
  .stats__num{font-size:24px}
  .footer__grid{grid-template-columns:1fr;gap:28px}
  .faq__q{font-size:16px;padding:14px 18px}
  .faq__a{padding:0 18px 18px}
  .cta{padding:36px 22px;border-radius:16px}
  .cta::after{top:auto;bottom:0;right:-10%;width:60%;height:8px;transform:none;opacity:1}
  .cta__actions .btn{width:100%}
  .cta__title{font-size:22px}
}
@media (max-width:480px){
  .hero__title{font-size:25px}
  .stats__list{grid-template-columns:1fr;gap:16px}
  .stats__item{border-left:0;padding-left:0;border-top:1px solid var(--line);padding-top:14px}
  .stats__item:first-child{border-top:0;padding-top:0}
  .footer__bottom{flex-direction:column;gap:8px}
}

/* roulang page: article */
:root{
  --brand:#E2452B;
  --brand-hover:#C93A22;
  --brand-down:#AE3019;
  --brand-soft:#FDEDE9;
  --brand-line:#F3C7BE;
  --ink:#16222B;
  --ink-2:#22323D;
  --bg:#F7F6F3;
  --card:#FFFFFF;
  --alt:#F0EFEA;
  --soft:#FAF9F6;
  --text:#16222B;
  --text-2:#4E5A63;
  --text-3:#8A9399;
  --line:#E5E2DB;
  --line-dark:rgba(255,255,255,.10);
  --light-text:#F5F4F1;
  --light-weak:rgba(255,255,255,.66);
  --radius-btn:10px;
  --radius-card:14px;
  --radius-lg:20px;
  --radius-img:12px;
  --radius-pill:999px;
  --shadow-sm:0 1px 2px rgba(22,34,43,.06), 0 8px 24px -14px rgba(22,34,43,.20);
  --shadow-lg:0 10px 30px -12px rgba(22,34,43,.28);
  --sidenav-w:232px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ============ 顶栏（移动） ============ */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:80;
  height:56px;
  padding:0 16px;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  align-items:center;
  justify-content:space-between;
}
.topbar__toggle{
  width:40px;height:40px;border:0;background:transparent;position:relative;cursor:pointer;border-radius:8px;
}
.topbar__toggle span{
  position:absolute;left:9px;right:9px;top:50%;height:2px;margin-top:-1px;background:var(--light-text);
  transition:background .2s ease;
}
.topbar__toggle span::before,
.topbar__toggle span::after{
  content:"";position:absolute;left:0;right:0;height:2px;background:var(--light-text);
  transition:transform .2s ease;
}
.topbar__toggle span::before{top:-7px}
.topbar__toggle span::after{top:7px}
body.nav-open .topbar__toggle span{background:transparent}
body.nav-open .topbar__toggle span::before{transform:translateY(7px) rotate(45deg)}
body.nav-open .topbar__toggle span::after{transform:translateY(-7px) rotate(-45deg)}
body.nav-open{overflow:hidden}

/* ============ 左侧竖栏 ============ */
.sidenav{
  position:fixed;
  top:0;left:0;bottom:0;
  width:var(--sidenav-w);
  z-index:70;
  background:var(--ink);
  border-right:1px solid var(--line-dark);
  padding:24px;
  display:flex;
  flex-direction:column;
  gap:20px;
  overflow-y:auto;
}
.sidenav__brand{display:flex;flex-direction:column;gap:6px}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand__mark{
  width:24px;height:24px;flex:none;background:var(--brand);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand__text{font-size:19px;font-weight:800;letter-spacing:.2px;color:#fff;line-height:1.2;white-space:nowrap}
.sidenav__sub{font-size:12px;color:rgba(255,255,255,.42);line-height:1.5}
.sidenav__nav{display:flex;flex-direction:column;gap:22px;flex:1}
.nav-group{display:flex;flex-direction:column;gap:4px}
.nav-group__title{
  margin:0 0 6px;
  font-size:12px;
  letter-spacing:1px;
  color:rgba(255,255,255,.42);
  font-weight:500;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 12px;
  border-radius:8px;
  color:rgba(255,255,255,.78);
  font-size:15px;
  transition:background .18s ease,color .18s ease;
}
.nav-item__icon{width:18px;font-size:15px;text-align:center;flex:none}
.nav-item__mini{display:none}
.nav-item:hover{background:rgba(255,255,255,.07);color:#fff}
.nav-item.is-active{background:rgba(226,69,43,.16);color:#fff}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:10px;bottom:10px;width:3px;border-radius:2px;background:var(--brand);
}
.nav-panel__cta{margin-top:auto;padding-top:16px;border-top:1px solid var(--line-dark)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:600;border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,transform .18s ease,box-shadow .18s ease,border-color .18s ease,color .18s ease;
  white-space:nowrap;
}
.btn i{font-size:14px}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 10px 22px -12px rgba(226,69,43,.85)}
.btn--primary:active{background:var(--brand-down);transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--text);color:var(--text);height:44px;padding:0 20px}
.btn--ghost:hover{background:rgba(22,34,43,.06)}
.btn--light{background:var(--light-text);color:var(--ink)}
.btn--light:hover{background:#fff;transform:translateY(-1px);box-shadow:0 10px 24px -14px rgba(0,0,0,.6)}
.btn--sm{height:38px;padding:0 16px;font-size:14px}
.btn--block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed}
.text-link{color:var(--brand);font-size:14px;font-weight:600;transition:color .16s ease}
.text-link:hover{text-decoration:underline;text-underline-offset:3px}
.link-light{color:rgba(255,255,255,.82);font-size:14px;font-weight:600}
.link-light:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}

/* ============ 布局骨架 ============ */
.shell{margin-left:var(--sidenav-w);display:flex;flex-direction:column;min-height:100vh}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 40px}
.page{flex:1;padding:28px 0 0;width:100%}
.section-block{margin-top:56px}

/* ============ 面包屑 ============ */
.breadcrumbs{
  display:flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-3);
  white-space:nowrap;overflow-x:auto;padding-bottom:10px;
  scrollbar-width:none;
}
.breadcrumbs::-webkit-scrollbar{display:none}
.breadcrumbs a{color:var(--text-2);transition:color .16s ease}
.breadcrumbs a:hover{color:var(--brand)}
.breadcrumbs__sep{color:var(--text-3)}
.breadcrumbs__current{color:var(--text)}

/* ============ 文章头部 ============ */
.article{max-width:860px;margin:0 auto}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;color:var(--text-2);margin-bottom:14px;
}
.eyebrow::before{content:"";width:10px;height:10px;background:var(--brand);flex:none}
.article-title{
  font-size:34px;font-weight:800;line-height:1.35;letter-spacing:-.2px;margin-bottom:16px;
}
.meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:10px;
  font-size:13px;color:var(--text-3);
  padding-bottom:22px;border-bottom:1px solid var(--line);
}
.meta__sep{width:1px;height:12px;background:var(--line);flex:none}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;
  border-radius:var(--radius-pill);background:var(--brand-soft);color:var(--brand);
  font-size:12px;font-weight:600;
}
.article-cover{margin-top:28px}
.article-cover img{
  width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--radius-img);
}
.article-cover figcaption{font-size:13px;color:var(--text-3);margin-top:10px}

/* ============ 正文排版 ============ */
.article-body{
  margin-top:34px;
  font-size:16px;
  line-height:1.9;
  color:#1E2A33;
  min-height:320px;
}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 1.15em}
.article-body h2{
  position:relative;font-size:20px;font-weight:700;line-height:1.45;
  margin:40px 0 14px;padding-left:13px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:5px;bottom:5px;width:3px;border-radius:2px;background:var(--brand);
}
.article-body h3{font-size:17px;font-weight:600;line-height:1.55;margin:28px 0 10px}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;background:var(--soft);
  border-left:3px solid var(--brand);border-radius:0 var(--radius-img) var(--radius-img) 0;
  color:var(--text-2);
}
.article-body ul,.article-body ol{margin:0 0 1.15em;padding-left:22px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{line-height:1.85;margin-bottom:10px}
.article-body img{border-radius:var(--radius-img);margin:24px auto}
.article-body a{color:var(--brand);font-weight:500}
.article-body a:hover{text-decoration:underline;text-underline-offset:3px}
.article-body strong{font-weight:700}
.article-body table{
  width:100%;border-collapse:collapse;margin:24px 0;font-size:15px;
  display:block;overflow-x:auto;
}
.article-body th,.article-body td{
  border:1px solid var(--line);padding:12px 14px;text-align:left;line-height:1.7;
  min-width:120px;
}
.article-body th{background:var(--alt);font-weight:700}
.article-body code{
  background:var(--alt);padding:2px 6px;border-radius:6px;font-size:14px;
}
.article-body figcaption{font-size:14px;color:var(--text-3);text-align:center;margin-top:8px}
.article-body hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* ============ 会员提示条 ============ */
.member-note{
  margin-top:38px;
  background:var(--ink);
  border-radius:var(--radius-card);
  padding:22px 24px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:18px;
}
.member-note p{margin:0;font-size:14px;line-height:1.75;color:var(--light-weak)}
.member-note strong{display:block;font-size:17px;font-weight:700;color:var(--light-text);margin-bottom:4px}

/* ============ 标签 ============ */
.tags{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
}
.tag{
  display:inline-flex;align-items:center;height:32px;padding:0 15px;
  border-radius:var(--radius-pill);background:var(--alt);color:var(--text-2);
  font-size:13px;transition:background .16s ease,color .16s ease;
}
.tag:hover{background:var(--brand-soft);color:var(--brand)}

/* ============ 卡片 ============ */
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;
}
.section-head h2{font-size:22px;font-weight:700;line-height:1.4}
.section-head p{font-size:14px;color:var(--text-2);margin-top:6px}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-sm);overflow:hidden;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);border-color:var(--brand-line)}
.card__media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.card__body{padding:20px}
.card__title{
  font-size:17px;font-weight:600;line-height:1.5;margin:10px 0 8px;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card__desc{
  font-size:14px;line-height:1.8;color:var(--text-2);margin:0 0 16px;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card__foot{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--text-3);border-top:1px solid var(--line);padding-top:14px;
}
.card__link{color:var(--brand);font-weight:600}
.card__link:hover{text-decoration:underline;text-underline-offset:3px}

/* ============ 文末操作 ============ */
.article-actions{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:36px;
}

/* ============ 空态 ============ */
.empty{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius-card);
  padding:56px 24px;text-align:center;
}
.empty__icon{
  width:64px;height:64px;border-radius:50%;background:var(--alt);color:var(--brand);
  display:flex;align-items:center;justify-content:center;margin:0 auto 18px;font-size:24px;
}
.empty p{font-size:16px;color:var(--text-2);margin:0 0 22px}

/* ============ CTA ============ */
.cta{
  position:relative;overflow:hidden;
  margin-top:64px;
  background:var(--ink);
  border-radius:var(--radius-lg);
  padding:48px;
}
.cta__shape{
  position:absolute;right:-40px;top:-30px;width:32%;height:170%;
  background:var(--brand);opacity:.92;transform:rotate(-6deg);
}
.cta__inner{position:relative;max-width:620px}
.cta h2{font-size:28px;font-weight:700;color:var(--light-text);line-height:1.4;margin-bottom:12px}
.cta p{font-size:16px;line-height:1.8;color:var(--light-weak);margin-bottom:24px}
.cta__actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px}

/* ============ 页脚 ============ */
.footer{
  margin-top:80px;
  background:var(--ink);
  border-top:1px solid var(--line-dark);
  padding:56px 0 0;
  color:var(--light-weak);
}
.footer__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}
.footer .brand__text{color:#fff}
.footer__desc{font-size:14px;line-height:1.85;margin:14px 0 16px;max-width:330px}
.footer__contact{display:flex;flex-direction:column;gap:8px;font-size:13px}
.footer__contact i{color:var(--brand);margin-right:8px}
.footer__title{font-size:15px;font-weight:700;color:var(--light-text);margin-bottom:14px}
.footer__links{display:flex;flex-direction:column;gap:12px;font-size:15px}
.footer__links a{color:var(--light-weak);transition:color .16s ease,border-color .16s ease;border-left:2px solid transparent;padding-left:0}
.footer__links a:hover{color:#fff;padding-left:8px;border-left-color:var(--brand)}
.footer__bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  margin-top:48px;padding:20px 0;border-top:1px solid var(--line-dark);
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ============ 断点：1024-1279 竖栏收窄 ============ */
@media (min-width:1024px) and (max-width:1279px){
  :root{--sidenav-w:72px}
  .sidenav{padding:16px 8px;align-items:center}
  .sidenav__brand{align-items:center;gap:0}
  .sidenav__sub{display:none}
  .sidenav__nav{width:100%;gap:16px}
  .nav-group__title{display:none}
  .nav-item{
    flex-direction:column;justify-content:center;gap:2px;
    height:56px;padding:0;border-radius:10px;
  }
  .nav-item__text{display:none}
  .nav-item__icon{font-size:16px;width:auto}
  .nav-item__mini{display:block;font-size:10px;opacity:.85;line-height:1.2}
  .nav-item.is-active::before{top:8px;bottom:8px}
  .nav-panel__cta{width:100%}
  .nav-panel__cta .btn{height:44px;padding:0 6px;font-size:12px}
  .container{padding:0 32px}
}

/* ============ 断点：≤1023 顶部导航 ============ */
@media (max-width:1023px){
  .topbar{display:flex}
  .sidenav{
    top:56px;left:0;right:0;bottom:0;width:auto;
    padding:16px 20px 28px;
    transform:translateY(-12px);
    opacity:0;visibility:hidden;
    transition:opacity .24s ease,transform .24s ease,visibility .24s;
  }
  body.nav-open .sidenav{transform:none;opacity:1;visibility:visible}
  .shell{margin-left:0}
  .sidenav__brand{padding:8px 0 4px}
  .nav-item{
    height:48px;font-size:17px;border-radius:0;
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .nav-item.is-active::before{display:none}
  .nav-item.is-active{background:rgba(226,69,43,.16);color:#fff}
  .nav-panel__cta{border-top:1px solid var(--line-dark);padding-top:18px}
  .container{padding:0 24px}
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr}
  .cta{padding:36px}
  .cta__shape{width:24%;opacity:.85}
}

/* ============ 断点：≤767 手机 ============ */
@media (max-width:767px){
  .container{padding:0 18px}
  .page{padding-top:20px}
  .article-title{font-size:26px;line-height:1.4}
  .article-body{font-size:15.5px;margin-top:26px}
  .article-body h2{font-size:18px;margin-top:34px}
  .card-grid{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr;gap:26px}
  .footer{margin-top:56px;padding-top:40px}
  .cta{margin-top:48px;padding:28px;border-radius:16px}
  .cta h2{font-size:22px}
  .cta__shape{display:none}
  .cta__actions .btn{width:100%}
  .member-note{padding:18px 20px}
  .member-note .btn{width:100%}
  .section-head{flex-direction:column;align-items:flex-start;gap:8px}
}

/* ============ 断点：≤480 小屏 ============ */
@media (max-width:480px){
  .article-title{font-size:23px}
  .brand__text{font-size:16px}
  .meta{font-size:12px;gap:8px}
  .btn{height:44px;padding:0 18px;font-size:14px}
  .cta h2{font-size:20px}
  .footer__bottom{flex-direction:column;gap:6px}
}

/* roulang page: category1 */
:root{
  --brand:#E2452B;
  --brand-hover:#C93A22;
  --brand-active:#AE3019;
  --brand-soft:#FDEDE9;
  --brand-line:#F3C7BE;
  --ink:#16222B;
  --ink-2:#22323D;
  --text:#16222B;
  --text-2:#4E5A63;
  --text-3:#8A9399;
  --inv:#F5F4F1;
  --inv-weak:rgba(255,255,255,.66);
  --inv-line:rgba(255,255,255,.10);
  --bg:#F7F6F3;
  --card:#FFFFFF;
  --alt:#F0EFEA;
  --alt-2:#FAF9F6;
  --border:#E5E2DB;
  --tier-basic:#9AA6AD;
  --tier-plus:#0FA98C;
  --tier-pro:#D9A227;
  --tier-flagship:#16222B;
  --gold:#E9C46A;
  --r-sm:8px;
  --r-btn:10px;
  --r-card:14px;
  --r-pill:999px;
  --r-img:12px;
  --r-block:20px;
  --sh-1:0 1px 2px rgba(22,34,43,.06), 0 8px 24px -14px rgba(22,34,43,.20);
  --sh-2:0 10px 30px -12px rgba(22,34,43,.28);
  --nav-w:232px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.9;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;color:var(--ink);font-weight:700}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
::selection{background:var(--brand-soft);color:var(--brand-active)}

/* ---------- 布局骨架 ---------- */
.container{width:100%;max-width:1200px;margin:0 auto}
.site-main{margin-left:var(--nav-w);min-height:100vh;display:flex;flex-direction:column;transition:margin-left .2s ease}
.page{flex:1;padding:0 40px}

/* ---------- 品牌 ---------- */
.brand{display:inline-flex;align-items:center;gap:10px}
.brand__mark{
  width:24px;height:24px;flex:0 0 24px;background:var(--brand);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
}
.brand__text{color:#fff;font-size:19px;font-weight:800;letter-spacing:.2px;line-height:1.2}
.brand__sub{display:block;margin-top:8px;font-size:12px;color:rgba(255,255,255,.50);letter-spacing:.6px}

/* ---------- 左侧竖栏导航 ---------- */
.sidenav{
  position:fixed;top:0;left:0;bottom:0;width:var(--nav-w);
  background:var(--ink);
  border-right:1px solid var(--inv-line);
  padding:24px;
  display:flex;flex-direction:column;
  z-index:80;
}
.sidenav__brand{padding-bottom:20px}
.sidenav__nav{
  display:flex;flex-direction:column;
  flex:1;min-height:0;overflow-y:auto;
  padding-top:8px;
  scrollbar-width:thin;
  scrollbar-color:rgba(255,255,255,.18) transparent;
}
.sidenav__nav::-webkit-scrollbar{width:6px}
.sidenav__nav::-webkit-scrollbar-thumb{background:rgba(255,255,255,.16);border-radius:3px}
.nav-group + .nav-group{margin-top:28px}
.nav-group__title{
  font-size:12px;letter-spacing:1px;color:rgba(255,255,255,.42);
  margin:0 0 10px;padding-left:12px;font-weight:600;
}
.nav-item{
  position:relative;
  display:flex;align-items:center;gap:12px;
  height:44px;padding:0 12px;border-radius:var(--r-sm);
  color:rgba(255,255,255,.78);font-size:15px;
  transition:background .16s ease,color .16s ease;
}
.nav-item:hover{background:rgba(255,255,255,.07);color:#fff}
.nav-item.is-active{background:rgba(226,69,43,.16);color:#fff;font-weight:600}
.nav-item.is-active::before{
  content:"";position:absolute;left:0;top:50%;transform:translateY(-50%);
  width:3px;height:20px;background:var(--brand);border-radius:2px;
}
.nav-item__icon{width:18px;text-align:center;font-size:16px;color:inherit}
.nav-item__mini{display:none}
.nav-panel__cta{
  margin-top:auto;padding-top:20px;border-top:1px solid var(--inv-line);
}

/* ---------- 移动端顶栏 ---------- */
.topbar{
  display:none;
  position:fixed;top:0;left:0;right:0;height:56px;
  background:var(--ink);border-bottom:1px solid var(--inv-line);
  align-items:center;z-index:90;
  transition:box-shadow .2s ease,opacity .2s ease;
}
.topbar.is-scrolled{box-shadow:0 10px 28px -16px rgba(0,0,0,.7);opacity:.97}
.topbar__inner{
  width:100%;padding:0 18px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand--top .brand__text{font-size:16px}
.topbar__toggle{
  width:40px;height:40px;border:0;background:transparent;
  display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;
  cursor:pointer;border-radius:var(--r-sm);transition:background .16s ease;
}
.topbar__toggle:hover{background:rgba(255,255,255,.08)}
.topbar__toggle span{
  display:block;width:20px;height:2px;background:#fff;border-radius:2px;
  transition:transform .2s ease,opacity .2s ease;
}
.topbar__toggle.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.topbar__toggle.is-active span:nth-child(2){opacity:0}
.topbar__toggle.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.scrim{
  display:none;position:fixed;inset:0;background:rgba(22,34,43,.55);
  z-index:70;opacity:0;pointer-events:none;transition:opacity .24s ease;
}
.scrim.is-open{opacity:1;pointer-events:auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease;
}
.btn--lg{height:48px;padding:0 24px;font-size:16px}
.btn--sm{height:34px;padding:0 14px;font-size:14px}
.btn--block{display:flex;width:100%}
.btn--primary{background:var(--brand);color:#fff}
.btn--primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 10px 22px -10px rgba(226,69,43,.62)}
.btn--primary:active{background:var(--brand-active);transform:none;box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn--ghost:hover{background:rgba(22,34,43,.06)}
.btn--outline{background:#fff;border-color:var(--border);color:var(--ink)}
.btn--outline:hover{border-color:var(--brand-line);color:var(--brand);transform:translateY(-1px);box-shadow:var(--sh-1)}
.btn--dark{background:var(--ink);color:#fff}
.btn--dark:hover{background:var(--ink-2);transform:translateY(-1px)}
.btn--light{background:var(--inv);color:var(--ink)}
.btn--light:hover{background:#fff;transform:translateY(-1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.link{color:var(--brand);font-weight:600;transition:color .16s ease}
.link:hover{text-decoration:underline;text-underline-offset:3px;color:var(--brand-hover)}
.link--inv{color:var(--gold)}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;align-items:center;gap:8px;
  padding:26px 0 18px;font-size:13px;color:var(--text-3);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.breadcrumb a{transition:color .16s ease}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb__sep{color:var(--border)}
.breadcrumb__current{color:var(--text);font-weight:600}

/* ---------- 页头 ---------- */
.pagehead{
  position:relative;overflow:hidden;
  background:var(--alt);border-radius:var(--r-block);
  padding:48px;margin-bottom:12px;
}
.pagehead::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(22,34,43,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(22,34,43,.045) 1px,transparent 1px);
  background-size:36px 36px;
  -webkit-mask-image:linear-gradient(115deg,#000 0%,transparent 68%);
  mask-image:linear-gradient(115deg,#000 0%,transparent 68%);
}
.pagehead__grid{
  position:relative;z-index:1;
  display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;font-weight:600;color:var(--brand);
  letter-spacing:.4px;margin-bottom:16px;
}
.eyebrow__dot{width:8px;height:8px;background:var(--brand);border-radius:2px;display:inline-block}
.pagehead__title{font-size:38px;font-weight:800;line-height:1.25;letter-spacing:-.3px}
.pagehead__title::after{
  content:"";display:block;width:120px;height:6px;margin-top:18px;
  background:var(--brand);border-radius:3px;transform:skewX(-24deg);
}
.pagehead__lede{
  margin-top:20px;max-width:640px;
  font-size:18px;line-height:1.75;color:var(--text-2);
}
.pagehead__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.78);border:1px solid var(--border);
  font-size:14px;color:var(--text-2);
}
.badge i{color:var(--brand);font-size:13px}
.pagehead__media{position:relative}
.pagehead__media img{
  width:100%;aspect-ratio:3/2;object-fit:cover;
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  position:relative;z-index:1;
}
.pagehead__media::after{
  content:"";position:absolute;right:-14px;bottom:-14px;
  width:130px;height:130px;border:4px solid var(--brand);
  border-radius:var(--r-img);z-index:0;
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section--tight{padding-top:64px}
.sec-head{max-width:760px;margin-bottom:44px}
.sec-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-size:12px;letter-spacing:1px;color:var(--text-3);font-weight:600;
}
.sec-eyebrow::before{content:"";width:3px;height:14px;background:var(--brand);border-radius:2px}
.sec-title{font-size:28px;font-weight:700;margin:14px 0 14px;letter-spacing:-.2px}
.sec-sub{font-size:16px;line-height:1.85;color:var(--text-2)}
.panel{
  background:var(--alt);border-radius:var(--r-block);padding:40px;
}
.panel--card{
  background:var(--card);border:1px solid var(--border);
  box-shadow:var(--sh-1);border-radius:var(--r-block);padding:36px;
}

/* ---------- 图文交替行 ---------- */
.frow{
  display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;
  padding:44px 0;border-top:1px solid var(--border);
}
.frow:first-of-type{border-top:0;padding-top:0}
.frow--rev .frow__media{order:-1}
.frow__title{font-size:20px;font-weight:600;margin-bottom:14px}
.frow__text{font-size:16px;line-height:1.85;color:var(--text-2);max-width:44ch}
.frow__list{margin-top:20px;display:grid;gap:10px}
.frow__list li{
  position:relative;padding-left:22px;
  font-size:15.5px;line-height:1.85;color:var(--text-2);
}
.frow__list li::before{
  content:"";position:absolute;left:2px;top:12px;
  width:8px;height:8px;border-radius:2px;background:var(--brand-soft);
  border:2px solid var(--brand);
}
.frow__media{position:relative}
.frow__media img{
  position:relative;z-index:1;
  width:100%;aspect-ratio:4/3;object-fit:cover;
  border-radius:var(--r-img);box-shadow:var(--sh-1);
}
.frow__media::after{
  content:"";position:absolute;left:-14px;bottom:-14px;
  width:110px;height:110px;border:4px solid var(--brand);
  border-radius:var(--r-img);z-index:0;opacity:.9;
}
.frow--rev .frow__media::after{left:auto;right:-14px}

/* ---------- 权益清单 ---------- */
.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 36px}
.check-item{
  display:flex;align-items:flex-start;gap:12px;
  font-size:15.5px;line-height:1.75;color:var(--text-2);
}
.check-item i{color:var(--brand);font-size:15px;margin-top:7px;flex:0 0 15px}
.panel__foot{
  margin-top:28px;padding-top:20px;border-top:1px solid var(--border);
  display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;
  font-size:13px;color:var(--text-3);
}

/* ---------- 等级卡带 ---------- */
.belt-wrap{position:relative;margin:0 -6px}
.belt-wrap::before,.belt-wrap::after{
  content:"";position:absolute;top:0;bottom:22px;width:36px;pointer-events:none;z-index:2;
}
.belt-wrap::before{left:0;background:linear-gradient(90deg,var(--bg),rgba(247,246,243,0))}
.belt-wrap::after{right:0;background:linear-gradient(270deg,var(--bg),rgba(247,246,243,0))}
.belt{
  display:flex;gap:20px;
  overflow-x:auto;padding:14px 6px 22px;
  scroll-snap-type:x mandatory;
  -ms-overflow-style:none;scrollbar-width:none;
}
.belt::-webkit-scrollbar{display:none}
.tier{
  position:relative;flex:0 0 280px;scroll-snap-align:start;
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-card);padding:0 24px 24px;
  box-shadow:var(--sh-1);
  display:flex;flex-direction:column;
  transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.tier:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--brand-line)}
.tier__band{display:block;height:4px;margin:0 -24px 22px;border-radius:13px 13px 0 0;background:var(--tier-basic)}
.tier--basic .tier__band{background:var(--tier-basic)}
.tier--plus .tier__band{background:var(--tier-plus)}
.tier--pro .tier__band{background:var(--tier-pro)}
.tier--flagship .tier__band{background:linear-gradient(90deg,var(--tier-flagship),var(--gold))}
.tier.is-featured{border:2px solid var(--tier-pro);transform:translateY(-4px);box-shadow:var(--sh-2)}
.tier.is-featured:hover{transform:translateY(-6px)}
.tier__flag{
  position:absolute;top:-11px;right:18px;
  background:var(--brand);color:#fff;font-size:12px;font-weight:600;
  padding:3px 12px;border-radius:var(--r-pill);
}
.tier__badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.4px;
  padding:4px 12px;border-radius:var(--r-pill);
  background:var(--alt);color:var(--text-2);
}
.tier--plus .tier__badge{background:rgba(15,169,140,.10);color:#0C8A72}
.tier--pro .tier__badge{background:rgba(217,162,39,.14);color:#9C7413}
.tier--flagship .tier__badge{background:rgba(22,34,43,.08);color:var(--ink)}
.tier__price{display:flex;align-items:baseline;gap:6px;margin:14px 0 6px}
.tier__price .num{
  font-size:32px;font-weight:700;color:var(--ink);
  font-variant-numeric:tabular-nums;line-height:1.1;
}
.tier__price .unit{font-size:12px;color:var(--text-3)}
.tier__note{font-size:13px;color:var(--text-3);line-height:1.7;min-height:44px}
.tier__list{display:grid;gap:10px;margin:18px 0 22px}
.tier__list li{display:flex;gap:10px;font-size:15px;line-height:1.7;color:var(--text-2)}
.tier__list i{font-size:13px;margin-top:6px;flex:0 0 13px;color:var(--tier-basic)}
.tier--plus .tier__list i{color:var(--tier-plus)}
.tier--pro .tier__list i{color:var(--tier-pro)}
.tier--flagship .tier__list i{color:var(--gold)}
.tier__cta{margin-top:auto}
.belt-note{margin-top:6px;font-size:13px;color:var(--text-3)}

/* ---------- FAQ ---------- */
.faq{
  background:var(--card);border:1px solid var(--border);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
}
.faq details + details{border-top:1px solid var(--border)}
.faq summary{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:60px;padding:16px 24px;cursor:pointer;list-style:none;
  font-size:17px;font-weight:600;color:var(--ink);
  transition:background .16s ease,color .16s ease;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary:hover{background:var(--alt-2);color:var(--brand)}
.faq__icon{
  flex:0 0 24px;text-align:center;color:var(--brand);font-size:16px;
  transition:transform .22s ease;
}
.faq details[open] summary{color:var(--brand)}
.faq details[open] .faq__icon{transform:rotate(45deg)}
.faq__body{
  padding:0 24px 22px;background:var(--alt-2);
  font-size:15px;line-height:1.85;color:var(--text-2);
}
.faq__body p + p{margin-top:10px}

/* ---------- 页尾 CTA ---------- */
.cta-block{
  background:var(--alt);border:1px solid var(--border);border-radius:var(--r-block);
  padding:48px;display:grid;grid-template-columns:1.4fr 1fr;gap:32px;align-items:center;
  position:relative;overflow:hidden;
}
.cta-block::after{
  content:"";position:absolute;top:-40px;right:-60px;
  width:240px;height:240px;background:var(--brand);
  opacity:.10;transform:rotate(-18deg);border-radius:24px;
}
.cta-block__copy{position:relative;z-index:1}
.cta-block__title{font-size:28px;font-weight:700;letter-spacing:-.2px}
.cta-block__text{margin-top:14px;font-size:16px;line-height:1.85;color:var(--text-2);max-width:52ch}
.cta-block__side{
  position:relative;z-index:1;display:flex;flex-direction:column;gap:14px;align-items:stretch;
}
.cta-block__links{display:flex;flex-wrap:wrap;gap:8px 22px;font-size:14px;justify-content:center}

/* ---------- 页脚 ---------- */
.footer{
  margin-top:88px;
  background:var(--ink);
  border-top:1px solid var(--inv-line);
  padding:64px 40px 0;
  color:var(--inv-weak);
}
.footer__grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;
  max-width:1200px;margin:0 auto;
}
.footer__desc{margin-top:16px;font-size:14px;line-height:1.85;color:var(--inv-weak);max-width:36ch}
.footer__contact{margin-top:18px;display:grid;gap:8px;font-size:13px;color:rgba(255,255,255,.52)}
.footer__contact i{color:var(--brand);margin-right:8px;font-size:12px}
.footer__title{font-size:14px;font-weight:700;color:#fff;letter-spacing:.6px;margin-bottom:16px}
.footer__links{display:grid;gap:12px}
.footer__links a{
  font-size:15px;color:var(--inv-weak);
  padding-left:0;transition:color .16s ease,padding-left .16s ease,box-shadow .16s ease;
}
.footer__links a:hover{color:#fff;padding-left:8px;box-shadow:inset 3px 0 0 var(--brand)}
.footer__bottom{
  max-width:1200px;margin:48px auto 0;padding:22px 0;
  border-top:1px solid var(--inv-line);
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.48);
}

/* ---------- 断点：1024–1279 竖栏收窄 ---------- */
@media (max-width:1279px){
  :root{--nav-w:72px}
  .sidenav{width:72px;padding:18px 10px}
  .sidenav .brand{justify-content:center}
  .brand__text,.brand__sub,.nav-group__title,.nav-item__text,.nav-panel__cta{display:none}
  .nav-group + .nav-group{margin-top:16px}
  .nav-item{
    flex-direction:column;justify-content:center;gap:3px;
    height:56px;padding:0;font-size:11px;
  }
  .nav-item__icon{font-size:17px}
  .nav-item__mini{display:block;font-size:10px;line-height:1;opacity:.72}
  .site-main{margin-left:72px}
  .page{padding:0 28px}
  .footer{padding:56px 28px 0;margin-top:72px}
  .pagehead{padding:40px}
  .pagehead__grid{gap:36px}
}

/* ---------- 断点：≤1023 顶部导航 ---------- */
@media (max-width:1023px){
  .topbar{display:flex}
  .sidenav{
    width:280px;padding:22px;
    transform:translateX(-100%);
    transition:transform .24s ease-out;
    box-shadow:0 24px 64px -24px rgba(0,0,0,.65);
  }
  .sidenav.is-open{transform:none}
  .sidenav .brand{justify-content:flex-start}
  .brand__text{display:block;font-size:17px}
  .brand__sub{display:block}
  .nav-group__title{display:block;font-size:12px}
  .nav-item__text{display:block}
  .nav-item{
    flex-direction:row;justify-content:flex-start;gap:12px;
    height:48px;padding:0 12px;font-size:17px;
    border-bottom:1px solid rgba(255,255,255,.08);
    border-radius:0;
  }
  .nav-item__icon{font-size:16px}
  .nav-item__mini{display:none}
  .nav-item.is-active{border-radius:var(--r-sm)}
  .nav-item.is-active::before{height:24px}
  .nav-panel__cta{display:block;border-top:1px solid var(--inv-line)}
  .scrim{display:block}
  .site-main{margin-left:0;padding-top:56px}
  .page{padding:0 20px}
  .footer{padding:48px 20px 0;margin-top:64px}
  .pagehead{padding:36px}
  .pagehead__grid{grid-template-columns:1fr;gap:32px}
  .pagehead__media::after{right:-10px;bottom:-10px;width:96px;height:96px}
  .section{padding:64px 0}
  .frow{grid-template-columns:1fr;gap:26px;padding:36px 0}
  .frow--rev .frow__media{order:0}
  .frow__media::after,.frow--rev .frow__media::after{left:-10px;right:auto;bottom:-10px;width:84px;height:84px}
  .frow__text{max-width:none}
  .check-grid{grid-template-columns:1fr}
  .cta-block{grid-template-columns:1fr;padding:36px}
  .footer__grid{grid-template-columns:1fr 1fr;gap:32px}
}

/* ---------- 断点：≤767 移动 ---------- */
@media (max-width:767px){
  body{font-size:15.5px}
  .pagehead{padding:26px;border-radius:16px}
  .pagehead__title{font-size:28px}
  .pagehead__lede{font-size:16px}
  .pagehead__actions{flex-direction:column;align-items:stretch;gap:12px}
  .pagehead__actions .btn{width:100%}
  .badges{gap:8px}
  .badge{font-size:13px;padding:6px 12px}
  .section{padding:52px 0}
  .sec-title{font-size:22px}
  .sec-head{margin-bottom:30px}
  .panel,.panel--card{padding:24px;border-radius:16px}
  .cta-block{padding:26px;border-radius:16px}
  .cta-block__title{font-size:22px}
  .frow__title{font-size:18px}
  .tier{flex:0 0 262px}
  .tier.is-featured{transform:none}
  .tier.is-featured:hover{transform:translateY(-2px)}
  .faq summary{font-size:16px;padding:14px 18px;min-height:54px}
  .faq__body{padding:0 18px 18px}
  .footer__grid{grid-template-columns:1fr;gap:30px}
  .footer__bottom{flex-direction:column;justify-content:flex-start}
  .breadcrumb{font-size:12px}
}

/* ---------- 断点：≤480 小屏 ---------- */
@media (max-width:480px){
  .page{padding:0 14px}
  .footer{padding:40px 14px 0;margin-top:52px}
  .pagehead{padding:22px}
  .pagehead__title{font-size:24px}
  .sec-title{font-size:20px}
  .tier{flex:0 0 240px}
  .cta-block__links{justify-content:flex-start}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --brand:#E2452B;
  --brand-hover:#C93A22;
  --brand-active:#AE3019;
  --brand-soft:#FDEDE9;
  --brand-line:#F3C7BE;
  --ink:#16222B;
  --ink-2:#22323D;
  --text:#16222B;
  --text-2:#4E5A63;
  --text-3:#8A9399;
  --inverse:#F5F4F1;
  --inverse-2:rgba(255,255,255,.66);
  --bg:#F7F6F3;
  --card:#FFFFFF;
  --alt:#F0EFEA;
  --line:#E5E2DB;
  --tier-basic:#9AA6AD;
  --tier-plus:#0FA98C;
  --tier-pro:#D9A227;
  --tier-max:#E9C46A;
  --r-btn:10px;
  --r-input:10px;
  --r-card:14px;
  --r-img:12px;
  --r-block:20px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(22,34,43,.06),0 8px 24px -14px rgba(22,34,43,.20);
  --shadow-2:0 10px 30px -12px rgba(22,34,43,.28);
  --nav-w:232px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
}

/* ============ 基础 reset ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none;transition:color .18s ease,background-color .18s ease,border-color .18s ease,transform .18s ease,box-shadow .18s ease}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
h1,h2,h3,h4,p,figure{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
::selection{background:var(--brand-soft);color:var(--brand-active)}

/* ============ 布局骨架 ============ */
.app{min-height:100vh}
.main{
  margin-left:var(--nav-w);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background:var(--bg);
}
.main > main{flex:1 1 auto}
.container{
  width:100%;
  max-width:1280px;
  margin:0 auto;
  padding:0 40px;
}

/* ============ 左侧竖栏 ============ */
.sidenav{
  position:fixed;
  top:0;
  left:0;
  bottom:0;
  width:var(--nav-w);
  background:var(--ink);
  border-right:1px solid rgba(255,255,255,.10);
  padding:24px;
  display:flex;
  flex-direction:column;
  overflow-y:auto;
  z-index:60;
}
.sidenav__head{padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.10)}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand__mark{
  width:24px;height:24px;flex:0 0 auto;
  background:var(--brand);
  border-radius:3px;
  transform:skewX(-12deg);
}
.brand__text{
  font-size:19px;
  font-weight:800;
  letter-spacing:.2px;
  line-height:1.2;
  color:var(--inverse);
}
.brand__sub{
  margin-top:8px;
  font-size:12px;
  letter-spacing:.4px;
  color:rgba(255,255,255,.46);
}
.sidenav__nav{
  display:flex;
  flex-direction:column;
  flex:1 1 auto;
  padding-top:6px;
}
.nav-group{margin-top:22px}
.nav-group__title{
  font-size:12px;
  letter-spacing:1px;
  color:rgba(255,255,255,.42);
  padding:0 10px 8px;
}
.nav-item{
  position:relative;
  display:flex;
  align-items:center;
  gap:10px;
  height:44px;
  padding:0 10px;
  border-radius:8px;
  font-size:15px;
  color:rgba(255,255,255,.78);
}
.nav-item:hover{background:rgba(255,255,255,.07);color:#FFFFFF}
.nav-item:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.nav-item.is-active{background:rgba(226,69,43,.16);color:#FFFFFF}
.nav-item.is-active::before{
  content:"";
  position:absolute;
  left:0;top:10px;bottom:10px;
  width:3px;
  border-radius:2px;
  background:var(--brand);
}
.nav-item__icon{width:18px;font-size:15px;text-align:center;flex:0 0 auto}
.nav-item__text{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nav-item__mini{display:none;font-size:10px;letter-spacing:.2px;white-space:nowrap}
.nav-panel__cta{
  margin-top:24px;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.10);
}

/* ============ 顶部导航（移动端） ============ */
.topbar{
  display:none;
  position:sticky;
  top:0;
  z-index:70;
  height:56px;
  align-items:center;
  justify-content:space-between;
  padding:0 16px;
  background:var(--ink);
  border-bottom:1px solid rgba(255,255,255,.10);
  transition:box-shadow .2s ease,opacity .2s ease;
}
.topbar.is-scrolled{box-shadow:0 8px 20px -12px rgba(22,34,43,.55);opacity:.96}
.topbar .brand__text{font-size:16px}
.topbar .brand__mark{width:20px;height:20px}
.nav-toggle{
  width:40px;height:40px;
  display:inline-flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  background:transparent;
  border:1px solid rgba(255,255,255,.14);
  border-radius:10px;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#FFFFFF;border-radius:2px;transition:transform .2s ease,opacity .2s 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)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 24px;
  border:1px solid transparent;
  border-radius:var(--r-btn);
  font-size:16px;
  font-weight:600;
  line-height:1;
  white-space:nowrap;
  text-align:center;
}
.btn--primary{background:var(--brand);color:#FFFFFF}
.btn--primary:hover{background:var(--brand-hover);transform:translateY(-1px);box-shadow:0 10px 22px -12px rgba(226,69,43,.85)}
.btn--primary:active{background:var(--brand-active);transform:translateY(0);box-shadow:none}
.btn--ghost{background:transparent;border-color:var(--text);color:var(--text)}
.btn--ghost:hover{background:rgba(22,34,43,.06)}
.btn--ghost:active{background:rgba(22,34,43,.12)}
.btn--light{background:var(--inverse);color:var(--ink)}
.btn--light:hover{background:#FFFFFF;transform:translateY(-1px)}
.btn--sm{height:40px;padding:0 18px;font-size:15px}
.btn--xs{height:34px;padding:0 14px;font-size:14px}
.btn--block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed}
.link-more{color:var(--brand);font-size:14px;font-weight:600}
.link-more:hover{text-decoration:underline;text-underline-offset:3px}
.link-invert{color:var(--inverse-2);font-size:15px;border-bottom:1px solid rgba(255,255,255,.32);padding-bottom:2px}
.link-invert:hover{color:#FFFFFF;border-color:var(--brand)}

/* ============ 面包屑 ============ */
.crumbs{
  padding-top:22px;
  font-size:13px;
  color:var(--text-3);
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs .sep{margin:0 7px;color:var(--text-3)}
.crumbs .current{color:var(--text)}

/* ============ 页头区 ============ */
.pagehead-wrap{padding-top:22px}
.pagehead{
  background:var(--alt);
  border-radius:var(--r-block);
  padding:44px;
  display:grid;
  grid-template-columns:minmax(0,1fr) 340px;
  gap:40px;
  align-items:start;
}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:9px;
  font-size:12px;
  letter-spacing:1px;
  color:var(--text-3);
}
.eyebrow__dot{width:8px;height:8px;background:var(--brand);border-radius:2px;transform:skewX(-12deg)}
.eyebrow__num{color:var(--brand);font-weight:700;letter-spacing:0}
.pagehead__title{
  margin-top:14px;
  font-size:38px;
  font-weight:800;
  line-height:1.25;
  letter-spacing:-.2px;
}
.pagehead__bar{
  width:120px;
  height:6px;
  margin-top:18px;
  background:var(--brand);
  clip-path:polygon(0 0,100% 0,calc(100% - 16px) 100%,0 100%);
}
.pagehead__lead{
  margin-top:18px;
  font-size:18px;
  line-height:1.75;
  color:var(--text-2);
  max-width:640px;
}
.pagehead__actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.infocard{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:24px;
  box-shadow:var(--shadow-1);
}
.infocard__row + .infocard__row{
  margin-top:16px;
  padding-top:16px;
  border-top:1px solid var(--line);
}
.infocard__label{display:block;font-size:12px;letter-spacing:.6px;color:var(--text-3)}
.infocard__value{display:block;margin-top:7px;font-size:15px;font-weight:600;line-height:1.65;color:var(--text)}
.infocard__value--plain{font-weight:400;font-size:14px;color:var(--text-2)}

/* ============ 板块与标题 ============ */
.section{padding-top:88px}
.section--first{padding-top:64px}
.sec-head{max-width:760px;margin-bottom:36px}
.sec-title{
  position:relative;
  margin-top:12px;
  padding-left:16px;
  font-size:28px;
  font-weight:700;
  line-height:1.3;
}
.sec-title::before{
  content:"";
  position:absolute;
  left:0;top:6px;bottom:6px;
  width:3px;
  border-radius:2px;
  background:var(--brand);
}
.sec-desc{margin-top:14px;font-size:16px;line-height:1.85;color:var(--text-2)}
.panel{
  background:var(--alt);
  border-radius:var(--r-block);
  padding:40px;
}

/* ============ 步骤流 ============ */
.steps{border-top:1px solid var(--line)}
.step{
  display:grid;
  grid-template-columns:88px minmax(0,1fr) 120px;
  gap:28px;
  align-items:start;
  padding:28px 0;
  border-bottom:1px solid var(--line);
}
.step__num{
  font-size:28px;
  font-weight:800;
  line-height:1.2;
  color:var(--brand);
  opacity:.42;
  font-variant-numeric:tabular-nums;
}
.step__title{font-size:20px;font-weight:600;line-height:1.4}
.step__desc{margin-top:10px;font-size:16px;line-height:1.85;color:var(--text-2);max-width:720px}
.step__img{
  width:120px;height:90px;
  object-fit:cover;
  border-radius:10px;
  border:1px solid var(--line);
}

/* ============ 对比表 ============ */
.table-wrap{
  overflow-x:auto;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-1);
}
.cmp{min-width:600px}
.cmp thead th{
  background:var(--alt);
  padding:18px 22px;
  font-size:16px;
  font-weight:700;
  text-align:left;
  color:var(--text);
  border-bottom:1px solid var(--line);
}
.cmp tbody th{
  width:32%;
  padding:18px 22px;
  font-size:15px;
  font-weight:600;
  text-align:left;
  color:var(--text);
}
.cmp tbody td{
  padding:18px 22px;
  font-size:15px;
  line-height:1.6;
  color:var(--text-2);
  font-variant-numeric:tabular-nums;
}
.cmp tbody tr:nth-child(odd) th,
.cmp tbody tr:nth-child(odd) td{border-bottom:1px solid var(--line)}
.cmp tbody tr:last-child th,
.cmp tbody tr:last-child td{border-bottom:none}
.cmp__yes{color:var(--ink);font-weight:600}
.cmp__yes i{color:var(--tier-plus);font-size:12px;margin-right:8px}
.cmp__none{color:var(--text-3)}
.table-note{margin-top:16px;font-size:13px;color:var(--text-3);line-height:1.8}

/* ============ 内容卡片 ============ */
.cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px}
.card{
  display:flex;
  flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--shadow-2);border-color:var(--brand-line)}
.card__media{position:relative;aspect-ratio:16/10;background:var(--alt);overflow:hidden}
.card__media img{width:100%;height:100%;object-fit:cover}
.card--locked .card__media::after{
  content:"";
  position:absolute;
  inset:0;
  background:rgba(22,34,43,.35);
}
.card__lock{
  position:absolute;
  right:12px;bottom:12px;
  z-index:2;
  width:24px;height:24px;
  display:grid;
  place-items:center;
  border-radius:50%;
  background:var(--ink);
  color:#FFFFFF;
  font-size:11px;
}
.card__body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.card--locked .card__body{opacity:.92}
.badge{
  display:inline-flex;
  align-items:center;
  align-self:flex-start;
  height:24px;
  padding:0 10px;
  border-radius:var(--r-pill);
  background:var(--brand-soft);
  color:var(--brand-active);
  font-size:12px;
  font-weight:600;
  letter-spacing:.2px;
}
.card__title{font-size:17px;font-weight:600;line-height:1.5}
.card__desc{font-size:14px;line-height:1.8;color:var(--text-2)}
.card__meta{
  margin-top:auto;
  padding-top:14px;
  border-top:1px dashed var(--line);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--text-3);
}
.card__link{color:var(--brand);font-weight:600;font-size:13px}
.card__link:hover{text-decoration:underline;text-underline-offset:3px}

/* ============ 咨询区 ============ */
.consult{
  display:grid;
  grid-template-columns:minmax(0,1fr) 460px;
  gap:40px;
  align-items:start;
}
.qa-list{margin-top:32px;display:flex;flex-direction:column;gap:22px}
.qa-item{padding-left:16px;border-left:3px solid var(--brand-line)}
.qa-item__q{font-size:17px;font-weight:600;line-height:1.5}
.qa-item__a{margin-top:8px;font-size:15px;line-height:1.85;color:var(--text-2)}
.form-card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:32px;
  box-shadow:var(--shadow-1);
}
.form-card__title{font-size:20px;font-weight:600}
.form-card__sub{margin-top:8px;font-size:14px;color:var(--text-2);line-height:1.7}
.form-grid{margin-top:24px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.field{display:flex;flex-direction:column;gap:8px}
.field--full{grid-column:1 / -1}
.field label{font-size:14px;font-weight:600}
.req{color:var(--brand)}
.input{
  width:100%;
  height:46px;
  padding:0 14px;
  background:#FFFFFF;
  border:1px solid var(--line);
  border-radius:var(--r-input);
  font-size:16px;
  color:var(--text);
  transition:border-color .16s ease,box-shadow .16s ease;
  appearance:none;
}
select.input{
  background-image:url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%234E5A63' stroke-width='1.6' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 14px center;
  padding-right:38px;
}
.textarea{height:auto;min-height:118px;padding:12px 14px;line-height:1.7;resize:vertical}
.input:hover{border-color:#D6D2C9}
.input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(226,69,43,.14);outline:none}
.input::placeholder{color:var(--text-3)}
.form-actions{
  margin-top:24px;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:16px;
  flex-wrap:wrap;
}
.form-hint{font-size:13px;color:var(--text-3);line-height:1.7;flex:1 1 180px}
.form-hint.is-visible{color:var(--tier-plus);font-weight:600}

/* ============ 深色 CTA ============ */
.cta{
  position:relative;
  overflow:hidden;
  background:var(--ink);
  border-radius:var(--r-block);
  padding:56px;
  color:var(--inverse);
}
.cta::after{
  content:"";
  position:absolute;
  right:-6%;
  top:-35%;
  width:30%;
  height:170%;
  background:var(--brand);
  opacity:.92;
  transform:rotate(-6deg);
}
.cta__content{position:relative;z-index:1;max-width:640px}
.cta__title{font-size:28px;font-weight:700;line-height:1.3;color:#FFFFFF}
.cta__desc{margin-top:14px;font-size:16px;line-height:1.85;color:var(--inverse-2)}
.cta__actions{margin-top:28px;display:flex;align-items:center;gap:20px;flex-wrap:wrap}
.back-row{margin-top:32px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.back-row__note{font-size:13px;color:var(--text-3)}

/* ============ 页脚 ============ */
.footer{
  margin-top:88px;
  background:var(--ink);
  border-top:1px solid rgba(255,255,255,.10);
  padding-top:64px;
  color:var(--inverse-2);
}
.footer__grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:36px;
}
.footer__desc{margin-top:16px;font-size:14px;line-height:1.85;color:var(--inverse-2);max-width:340px}
.footer__contact{margin-top:18px;display:flex;flex-direction:column;gap:9px;font-size:13px}
.footer__contact i{color:var(--brand);margin-right:9px}
.footer__title{font-size:15px;font-weight:600;color:#FFFFFF;margin-bottom:16px}
.footer__links{display:flex;flex-direction:column;gap:12px;font-size:15px}
.footer__links a{
  color:var(--inverse-2);
  padding-left:0;
  border-left:2px solid transparent;
}
.footer__links a:hover{color:#FFFFFF;padding-left:8px;border-left-color:var(--brand)}
.footer__bottom{
  margin-top:48px;
  padding:20px 0 28px;
  border-top:1px solid rgba(255,255,255,.10);
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--inverse-2);
}

/* ============ 工具类 ============ */
.measure{max-width:780px}

/* ============ 断点：1024–1279 折叠竖栏 ============ */
@media (max-width:1279px) and (min-width:1024px){
  :root{--nav-w:72px}
  .sidenav{padding:16px 10px;align-items:stretch}
  .sidenav__head{padding-bottom:14px;display:flex;justify-content:center}
  .brand__text,.brand__sub,.nav-group__title{display:none}
  .nav-group{margin-top:14px;padding-top:14px;border-top:1px solid rgba(255,255,255,.08)}
  .nav-group:first-child{border-top:none;margin-top:4px;padding-top:0}
  .nav-item{
    flex-direction:column;
    justify-content:center;
    gap:4px;
    height:56px;
    padding:0;
    text-align:center;
  }
  .nav-item__text{display:none}
  .nav-item__mini{display:block;color:inherit}
  .nav-item.is-active::before{left:-10px;top:14px;bottom:14px}
  .nav-panel__cta{margin-top:auto;padding-top:14px}
  .nav-panel__cta .btn{
    width:100%;
    height:46px;
    padding:0 4px;
    font-size:0;
  }
  .nav-panel__cta .btn::after{content:"会员";font-size:13px;letter-spacing:.5px}
  .container{padding:0 32px}
}

/* ============ 断点：≤1023 顶部导航 ============ */
@media (max-width:1023px){
  .topbar{display:flex}
  .main{margin-left:0}
  .sidenav{
    top:56px;
    bottom:auto;
    width:100%;
    height:calc(100vh - 56px);
    padding:16px 20px 24px;
    border-right:none;
    transform:translateY(-10px);
    opacity:0;
    visibility:hidden;
    transition:opacity .24s ease,transform .24s ease,visibility .24s ease;
  }
  .sidenav.is-open{transform:translateY(0);opacity:1;visibility:visible}
  .sidenav__head{display:none}
  .sidenav__nav{padding-top:0}
  .nav-group{margin-top:18px}
  .nav-group:first-child{margin-top:0}
  .nav-item{
    height:48px;
    border-radius:0;
    border-bottom:1px solid rgba(255,255,255,.08);
    font-size:17px;
  }
  .nav-item.is-active::before{top:6px;bottom:6px}
  .nav-panel__cta{margin-top:24px;border-top:none;padding-top:0}
  .nav-panel__cta .btn{width:100%}
  .container{padding:0 24px}
  .pagehead{grid-template-columns:minmax(0,1fr);gap:28px;padding:36px}
  .pagehead__title{font-size:32px}
  .consult{grid-template-columns:minmax(0,1fr);gap:32px}
  .cards{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
  .footer__grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:32px}
}

/* ============ 断点：≤767 ============ */
@media (max-width:767px){
  .section{padding-top:64px}
  .section--first{padding-top:48px}
  .sec-title{font-size:22px;padding-left:14px}
  .pagehead{padding:28px;border-radius:16px}
  .pagehead__title{font-size:28px}
  .pagehead__lead{font-size:16px}
  .panel{padding:24px;border-radius:16px}
  .step{grid-template-columns:56px minmax(0,1fr);gap:16px}
  .step__num{font-size:24px}
  .step__title{font-size:18px}
  .step__desc{font-size:15.5px}
  .step__img{
    grid-column:1 / -1;
    width:100%;
    height:auto;
    aspect-ratio:4/3;
  }
  .cards{grid-template-columns:minmax(0,1fr)}
  .form-card{padding:24px}
  .form-grid{grid-template-columns:minmax(0,1fr)}
  .form-actions{justify-content:stretch}
  .form-actions .btn{width:100%}
  .cta{padding:32px 24px;border-radius:16px}
  .cta::after{
    right:auto;
    left:0;
    top:0;
    width:100%;
    height:6px;
    transform:none;
    opacity:1;
  }
  .cta__title{font-size:22px}
  .cta__actions .btn{width:100%}
  .footer{padding-top:48px}
  .footer__grid{grid-template-columns:minmax(0,1fr);gap:28px}
  .footer__bottom{flex-direction:column;gap:8px}
}

/* ============ 断点：≤520 ============ */
@media (max-width:520px){
  .container{padding:0 16px}
  .pagehead__title{font-size:25px}
  .pagehead__actions{flex-direction:column;align-items:stretch}
  .pagehead__actions .btn{width:100%}
  .sec-title{font-size:21px}
  .btn{height:46px;font-size:15px}
  .btn--sm{height:40px}
  .topbar .brand__text{font-size:15px}
  .infocard{padding:20px}
  .qa-item__q{font-size:16px}
}