/* roulang page: index */
:root{
  --indigo:#1E2A4A;
  --indigo-deep:#0E1524;
  --indigo-mid:#3D4A6B;
  --gold:#C8A55B;
  --gold-soft:#F0E6D2;
  --paper:#FAF9F7;
  --paper-alt:#F2F0EB;
  --card:#FFFFFF;
  --ink:#1A1D23;
  --ink-2:#5B6270;
  --ink-3:#8B919C;
  --line:#E5E2DB;
  --ok:#3F7A5E;
  --warn:#B8862F;
  --err:#A8402F;
  --r-xs:2px;
  --r-sm:4px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,21,36,.05);
  --sh-2:0 12px 28px -14px rgba(14,21,36,.20);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --mono:"Inter","SFMono-Regular",Menlo,Consolas,monospace;
  --ease:cubic-bezier(.22,1,.36,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.is-locked{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--indigo);text-decoration:none;transition:color .22s var(--ease)}
a:hover{color:var(--gold)}
button{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.25;letter-spacing:-.01em;color:var(--ink)}
p{margin:0 0 1.4em}
ul,ol{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ---------- 通用按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-size:15px;font-weight:500;line-height:1;
  padding:14px 28px;border-radius:var(--r-xs);
  border:1px solid transparent;background:none;cursor:pointer;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .18s var(--ease),box-shadow .24s var(--ease);
  white-space:nowrap;
}
.btn .arrow{display:inline-block;transition:transform .24s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn:active{transform:translateY(1px)}
.btn:disabled,.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none}
.btn-primary{background:var(--indigo);color:#fff}
.btn-primary:hover{background:var(--indigo-deep);color:#fff}
.btn-ghost{border-color:rgba(243,241,236,.45);color:#F3F1EC}
.btn-ghost:hover{background:var(--gold-soft);border-color:var(--gold-soft);color:var(--indigo)}
.btn-outline{border-color:var(--indigo);color:var(--indigo)}
.btn-outline:hover{background:var(--gold-soft);border-color:var(--gold);color:var(--indigo)}
.btn-sm{padding:11px 20px;font-size:14px}
.text-link{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14.5px;color:var(--indigo);position:relative;padding-bottom:2px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .26s var(--ease);
}
.text-link:hover::after{transform:scaleX(1)}
.text-link .arrow{transition:transform .24s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}
.icon-btn{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid currentColor;border-radius:var(--r-xs);background:none;cursor:pointer;
  color:inherit;opacity:.75;transition:opacity .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.icon-btn:hover{opacity:1;background:rgba(200,165,91,.14);color:var(--gold)}
.icon-btn svg{width:16px;height:16px;display:block}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  height:72px;display:flex;align-items:center;
  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-scrolled{
  background:rgba(250,249,247,.96);
  backdrop-filter:saturate(160%) blur(10px);
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(14,21,36,.04);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;width:100%}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);flex:none;transition:box-shadow .3s var(--ease)}
.brand-name{display:block;font-family:var(--serif);font-size:19px;font-weight:700;line-height:1.2;letter-spacing:.02em;color:#F3F1EC;transition:color .3s var(--ease)}
.brand-sub{display:block;font-size:11px;line-height:1.5;letter-spacing:.1em;color:rgba(243,241,236,.6);transition:color .3s var(--ease)}
.is-scrolled .brand-name{color:var(--ink)}
.is-scrolled .brand-sub{color:var(--ink-3)}
.main-nav{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;font-size:15px;padding:6px 0;color:rgba(243,241,236,.74);
  transition:color .22s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--gold);
  transition:width .24s var(--ease);
}
.nav-link:hover{color:#fff}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:#fff}
.nav-link.is-active::after{width:100%}
.nav-link.is-active::before{
  content:"";position:absolute;left:-11px;top:50%;width:5px;height:5px;border-radius:50%;
  background:var(--gold);transform:translateY(-50%);
}
.is-scrolled .nav-link{color:var(--indigo-mid)}
.is-scrolled .nav-link:hover{color:var(--ink)}
.is-scrolled .nav-link.is-active{color:var(--ink)}
.header-actions{display:flex;align-items:center;gap:14px;flex:none}
.header-actions .icon-btn{color:#F3F1EC;border-color:rgba(243,241,236,.35)}
.is-scrolled .header-actions .icon-btn{color:var(--indigo-mid);border-color:var(--line)}
.menu-toggle{
  display:none;position:relative;width:38px;height:38px;flex:none;
  border:1px solid rgba(243,241,236,.35);border-radius:var(--r-xs);
  background:none;color:#F3F1EC;cursor:pointer;
  transition:background .2s var(--ease),border-color .2s var(--ease),color .2s var(--ease);
}
.is-scrolled .menu-toggle{color:var(--indigo);border-color:var(--line)}
.menu-toggle i{position:absolute;left:50%;width:16px;height:1px;background:currentColor;transform:translateX(-50%);transition:transform .24s var(--ease),top .24s var(--ease)}
.menu-toggle i:first-child{top:16px}
.menu-toggle i:last-child{top:21px}
.menu-toggle.is-open i:first-child{top:18px;transform:translateX(-50%) rotate(45deg)}
.menu-toggle.is-open i:last-child{top:18px;transform:translateX(-50%) rotate(-45deg)}

/* ---------- 移动抽屉 ---------- */
.mobile-drawer{
  display:none;position:fixed;inset:0;z-index:70;background:var(--paper);
  padding:88px 24px 40px;overflow-y:auto;
  opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);
  transition:opacity .28s var(--ease),transform .28s var(--ease),visibility .28s;
}
.drawer-list{border-top:1px solid var(--line)}
.drawer-list a{
  display:flex;align-items:center;justify-content:space-between;
  padding:20px 4px;border-bottom:1px solid var(--line);
  font-family:var(--serif);font-size:22px;font-weight:600;color:var(--indigo);
}
.drawer-list a::after{content:"→";font-family:var(--sans);font-size:15px;color:var(--ink-3)}
.drawer-list a:hover{color:var(--gold)}
.drawer-note{margin-top:28px;font-size:13.5px;line-height:1.8;color:var(--ink-3)}

/* ---------- Hero ---------- */
.hero{
  position:relative;display:flex;align-items:center;overflow:hidden;
  margin-top:-72px;padding:140px 0 72px;min-height:620px;
  background:#0E1524 url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  color:#F3F1EC;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,21,36,.78) 0%,rgba(14,21,36,.66) 42%,rgba(14,21,36,.34) 74%,rgba(250,249,247,.92) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:760px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  margin:0 0 22px;padding:7px 16px;border-radius:var(--r-pill);
  border:1px solid rgba(200,165,91,.55);background:rgba(200,165,91,.1);
  font-size:12.5px;letter-spacing:.08em;color:var(--gold-soft);
}
.hero h1{
  margin:0 0 20px;font-size:clamp(34px,5vw,56px);font-weight:700;
  line-height:1.24;letter-spacing:-.01em;color:#fff;
}
.hero-sub{margin:0 0 34px;font-size:17px;line-height:1.85;color:rgba(243,241,236,.78);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{
  display:flex;flex-wrap:wrap;gap:56px;margin-top:56px;padding-top:26px;
  border-top:1px solid rgba(243,241,236,.22);
}
.hero-stats strong{display:block;font-family:var(--mono);font-size:30px;font-weight:600;letter-spacing:.02em;font-variant-numeric:tabular-nums;color:#fff;line-height:1.2}
.hero-stats span{display:block;margin-top:4px;font-size:12.5px;letter-spacing:.08em;color:rgba(243,241,236,.6)}
.hero-stars{position:absolute;right:7%;bottom:20%;width:200px;height:130px;pointer-events:none;z-index:1}
.hero-stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--gold);animation:twinkle 6s infinite ease-in-out}
.hero-stars i:nth-child(1){left:12%;top:70%;animation-delay:0s}
.hero-stars i:nth-child(2){left:34%;top:42%;animation-delay:.9s}
.hero-stars i:nth-child(3){left:58%;top:78%;animation-delay:1.8s}
.hero-stars i:nth-child(4){left:74%;top:30%;animation-delay:2.6s}
.hero-stars i:nth-child(5){left:90%;top:62%;animation-delay:3.4s}
.hero-stars i:nth-child(6){left:46%;top:14%;animation-delay:4.2s}
@keyframes twinkle{0%,100%{opacity:.18;transform:scale(.85)}50%{opacity:.95;transform:scale(1.25)}}

/* ---------- 板块 ---------- */
.section{padding:104px 0}
.section-alt{background:var(--paper-alt)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;margin-bottom:48px;flex-wrap:wrap}
.section-head h2{position:relative;margin:0;font-size:clamp(28px,3.2vw,38px);font-weight:700;line-height:1.25}
.section-head h2::before{content:"";display:block;width:24px;height:2px;background:var(--gold);margin-bottom:16px}
.section-lead{margin:14px 0 0;max-width:660px;font-size:16px;line-height:1.85;color:var(--ink-2)}

/* ---------- 合集目录 ---------- */
.catalog{border-top:1px solid var(--line)}
.catalog-item{
  display:flex;align-items:center;gap:28px;
  padding:0 20px 0 8px;height:86px;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease),padding-left .24s var(--ease);
}
.catalog-item:hover{background:#fff;padding-left:16px}
.catalog-no{flex:none;width:34px;font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--gold);font-variant-numeric:tabular-nums}
.catalog-title{flex:none;width:280px;font-family:var(--serif);font-size:20px;font-weight:600;color:var(--indigo)}
.catalog-desc{flex:1;font-size:14.5px;line-height:1.6;color:var(--ink-2)}
.catalog-arrow{flex:none;font-size:15px;color:var(--ink-3);transition:transform .24s var(--ease),color .24s var(--ease)}
.catalog-item:hover .catalog-arrow{transform:translateX(4px);color:var(--gold)}

/* ---------- 精选条目 ---------- */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:start}
.feature-main{
  display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.feature-main:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--gold)}
.feature-media{position:relative;overflow:hidden;aspect-ratio:16/10;background:var(--paper-alt)}
.feature-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04);transition:transform .45s var(--ease)}
.feature-main:hover .feature-media img{transform:scale(1.03)}
.feature-body{padding:28px 30px 30px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--r-pill);
  border:1px solid rgba(200,165,91,.6);background:var(--gold-soft);
  font-size:12px;letter-spacing:.04em;color:#7A5F26;line-height:1.6;
}
.badge-plain{background:transparent;border-color:var(--line);color:var(--ink-2)}
.feature-body h3{
  margin:16px 0 12px;font-size:clamp(22px,2.2vw,26px);font-weight:700;line-height:1.35;
}
.feature-body h3 a{color:var(--indigo);background-image:linear-gradient(var(--gold),var(--gold));background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .3s var(--ease),color .22s var(--ease)}
.feature-body h3 a:hover{background-size:100% 1px;color:var(--indigo-deep)}
.feature-body p{margin:0 0 20px;font-size:15.5px;line-height:1.8;color:var(--ink-2)}
.feature-meta{display:flex;align-items:center;gap:14px;font-size:13px;color:var(--ink-3);font-family:var(--mono);letter-spacing:.02em}
.feature-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--ink-3)}

.mini-list{display:flex;flex-direction:column}
.mini-item{
  display:flex;gap:18px;padding:20px 4px;border-bottom:1px solid var(--line);
  transition:padding-left .24s var(--ease);
}
.mini-item:first-child{padding-top:0}
.mini-item:last-child{border-bottom:0;padding-bottom:0}
.mini-item:hover{padding-left:10px}
.mini-thumb{flex:none;width:96px;height:72px;border-radius:var(--r-sm);overflow:hidden;border:1px solid var(--line);background:var(--paper-alt)}
.mini-thumb img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04);transition:transform .45s var(--ease)}
.mini-item:hover .mini-thumb img{transform:scale(1.03)}
.mini-body h4{margin:0 0 6px;font-size:18px;font-weight:600;line-height:1.45}
.mini-body h4 a{color:var(--indigo)}
.mini-body h4 a:hover{color:var(--gold)}
.mini-body p{margin:0;font-size:14px;line-height:1.7;color:var(--ink-2)}

/* ---------- 最新信息（时间线） ---------- */
.stream{border-top:1px solid var(--line)}
.stream-item{
  display:grid;grid-template-columns:104px 132px 1fr 40px;gap:24px;align-items:start;
  padding:24px 8px;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.stream-item:hover{background:#fff}
.stream-date{font-family:var(--mono);font-size:13px;letter-spacing:.02em;color:var(--ink-3);padding-top:3px;font-variant-numeric:tabular-nums}
.stream-badge{padding-top:1px}
.stream-body h3{margin:0 0 8px;font-size:19px;font-weight:600;line-height:1.45}
.stream-body h3 a{color:var(--indigo);background-image:linear-gradient(var(--gold),var(--gold));background-size:0 1px;background-repeat:no-repeat;background-position:0 100%;transition:background-size .3s var(--ease)}
.stream-body h3 a:hover{background-size:100% 1px;color:var(--indigo-deep)}
.stream-body p{
  margin:0;font-size:15px;line-height:1.75;color:var(--ink-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.stream-more{
  justify-self:end;width:34px;height:34px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-xs);color:var(--ink-3);font-size:14px;
  transition:transform .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),background .24s var(--ease);
}
.stream-item:hover .stream-more{transform:translateX(4px);color:var(--gold);border-color:var(--gold);background:var(--gold-soft)}
.empty-state{
  border:1px solid var(--line);border-radius:var(--r-sm);background:var(--card);
  padding:56px 24px;text-align:center;
}
.empty-state p{margin:0 0 14px;font-size:16px;color:var(--ink-2)}
.empty-star{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--gold);margin-bottom:16px}

/* ---------- 横向推荐轨道 ---------- */
.rail-head{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:8px}
.rail-nav{display:flex;gap:10px}
.rail-wrap{margin-top:32px}
.rail{
  display:flex;gap:24px;overflow-x:auto;padding:4px 4px 22px;
  scroll-snap-type:x mandatory;scrollbar-width:none;-ms-overflow-style:none;
}
.rail::-webkit-scrollbar{display:none}
.rail-card{
  flex:0 0 calc((100% - 76px) / 3.2);scroll-snap-align:start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-sm);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .3s var(--ease),box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.rail-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:var(--gold)}
.rail-media{aspect-ratio:4/3;overflow:hidden;background:var(--paper-alt)}
.rail-media img{width:100%;height:100%;object-fit:cover;filter:saturate(.92) contrast(1.04);transition:transform .45s var(--ease)}
.rail-card:hover .rail-media img{transform:scale(1.03)}
.rail-body{padding:20px 22px 24px}
.rail-body h3{margin:12px 0 8px;font-size:18px;font-weight:600;line-height:1.45}
.rail-body h3 a{color:var(--indigo)}
.rail-body h3 a:hover{color:var(--gold)}
.rail-body p{margin:0;font-size:14px;line-height:1.7;color:var(--ink-2)}
.rail-progress{position:relative;height:1px;background:var(--line);overflow:hidden}
.rail-progress i{position:absolute;left:0;top:0;height:1px;width:28%;background:var(--gold);transition:width .2s var(--ease)}

/* ---------- 暗色 CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--indigo-deep);color:#F3F1EC;padding:88px 0}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 200px;gap:56px;align-items:center}
.cta-band h2{margin:0 0 18px;color:#fff;font-size:clamp(26px,3vw,36px);line-height:1.3}
.cta-band p{margin:0 0 30px;max-width:600px;font-size:16px;line-height:1.85;color:rgba(243,241,236,.72)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-band .btn-ghost{border-color:rgba(243,241,236,.42);color:#F3F1EC}
.cta-band .btn-ghost:hover{background:var(--gold);border-color:var(--gold);color:var(--indigo-deep)}
.qr-box{
  width:120px;height:120px;margin-left:auto;border:1px solid rgba(243,241,236,.28);
  border-radius:var(--r-sm);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;
  font-size:12.5px;letter-spacing:.08em;color:rgba(243,241,236,.6);
  background:rgba(243,241,236,.04);
}
.qr-dots{position:relative;width:34px;height:34px}
.qr-dots i{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--gold)}
.qr-dots i:nth-child(1){left:0;top:6px}
.qr-dots i:nth-child(2){left:14px;top:0}
.qr-dots i:nth-child(3){left:30px;top:9px}
.qr-dots i:nth-child(4){left:6px;top:26px}
.qr-dots i:nth-child(5){left:22px;top:28px}
.cta-band .hero-stars{right:5%;bottom:8%}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:860px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 4px;cursor:pointer;list-style:none;
  font-family:var(--serif);font-size:20px;font-weight:600;color:var(--indigo);
  transition:color .22s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--gold)}
.faq-item summary .sign{
  flex:none;width:22px;height:22px;position:relative;
  transition:transform .3s var(--ease);
}
.faq-item summary .sign::before,
.faq-item summary .sign::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--gold);transform:translate(-50%,-50%);
}
.faq-item summary .sign::before{width:14px;height:1px}
.faq-item summary .sign::after{width:1px;height:14px}
.faq-item[open] summary .sign{transform:rotate(45deg)}
.faq-item[open] summary{color:var(--indigo-deep)}
.faq-body{padding:0 4px 28px;font-size:16px;line-height:1.85;color:var(--ink-2);max-width:760px}
.faq-body p{margin:0}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--indigo-deep);color:rgba(243,241,236,.7);padding:80px 0 0;font-size:14px;position:relative;overflow:hidden}
.footer-grid{
  position:relative;z-index:2;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;
  padding-bottom:56px;
}
.footer-col h4{
  margin:0 0 20px;font-size:13px;letter-spacing:.1em;font-family:var(--sans);
  font-weight:600;color:rgba(243,241,236,.95);text-transform:none;
}
.footer-col p{margin:0 0 14px;line-height:1.85;color:rgba(243,241,236,.6)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-dot{width:6px;height:6px}
.footer-brand span{font-family:var(--serif);font-size:18px;font-weight:700;color:#fff}
.footer-links li{margin-bottom:12px}
.footer-links a{color:rgba(243,241,236,.68);position:relative;padding-bottom:2px}
.footer-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--gold);transition:width .26s var(--ease)}
.footer-links a:hover{color:#fff}
.footer-links a:hover::after{width:100%}
.footer-bottom{
  position:relative;z-index:2;
  border-top:1px solid rgba(243,241,236,.14);
  padding:24px 0 30px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(243,241,236,.5);
}
.footer-bottom .mono{font-family:var(--mono);letter-spacing:.02em}
.footer-stars{position:absolute;left:6%;top:64px;width:120px;height:70px;pointer-events:none;opacity:.5}
.footer-stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--gold)}
.footer-stars i:nth-child(1){left:0;top:30px}
.footer-stars i:nth-child(2){left:36px;top:8px}
.footer-stars i:nth-child(3){left:70px;top:40px}
.footer-stars i:nth-child(4){left:104px;top:16px}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .catalog-title{width:220px}
  .rail-card{flex:0 0 calc((100% - 48px) / 2.4)}
}
@media (max-width:992px){
  .section{padding:80px 0}
  .feature-grid{grid-template-columns:1fr;gap:36px}
  .catalog-item{height:auto;padding:20px 12px;align-items:flex-start;flex-wrap:wrap}
  .catalog-title{width:auto;flex:1;min-width:200px}
  .catalog-desc{flex-basis:100%;margin-top:8px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
  .cta-grid{grid-template-columns:1fr;gap:36px}
  .qr-box{margin-left:0}
  .rail-card{flex:0 0 calc((100% - 40px) / 2.1)}
}
@media (max-width:768px){
  body{font-size:16px}
  .main-nav{display:none}
  .menu-toggle{display:block}
  .mobile-drawer{display:block}
  .mobile-drawer.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:none}
  .header-actions .btn{display:none}
  .site-header{height:60px}
  .hero{margin-top:-60px;padding:112px 0 60px;min-height:520px}
  .hero-stats{gap:34px;margin-top:40px}
  .hero-stats strong{font-size:24px}
  .section{padding:60px 0}
  .section-head{margin-bottom:32px}
  .stream-item{grid-template-columns:1fr;gap:10px;padding:20px 4px}
  .stream-more{display:none}
  .stream-date{padding-top:0}
  .rail-card{flex:0 0 82%}
  .mini-item:first-child{padding-top:20px}
  .cta-band{padding:64px 0}
  .site-footer{padding-top:60px}
}
@media (max-width:560px){
  .container{padding:0 16px}
  .hero-actions{width:100%}
  .hero-actions .btn{flex:1;justify-content:center}
  .hero-stats{gap:24px;padding-top:20px}
  .feature-body{padding:22px 20px 24px}
  .rail-body{padding:18px 18px 22px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
}
@media (max-width:420px){
  .hero h1{font-size:30px}
  .hero-eyebrow{font-size:11.5px;padding:6px 12px}
  .btn{padding:13px 20px;font-size:14px}
  .btn-sm{padding:10px 16px}
}

/* roulang page: article */
:root{
  --ink:#1A1D23;
  --ink-soft:#5B6270;
  --ink-faint:#8B919C;
  --night:#1E2A4A;
  --night-deep:#0E1524;
  --night-mid:#3D4A6B;
  --gold:#C8A55B;
  --gold-deep:#8A6B22;
  --gold-soft:#F0E6D2;
  --paper:#FAF9F7;
  --paper-alt:#F2F0EB;
  --card:#FFFFFF;
  --line:#E5E2DB;
  --ok:#3F7A5E;
  --warn:#B8862F;
  --err:#A8402F;
  --radius:4px;
  --radius-btn:2px;
  --radius-pill:999px;
  --shadow:0 1px 2px rgba(14,21,36,.05);
  --shadow-hover:0 12px 28px -14px rgba(14,21,36,.20);
  --maxw:1200px;
  --reading:760px;
  --ease:cubic-bezier(.22,1,.36,1);
  --ff-serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --ff-sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ff-mono:"Inter","SFMono-Regular",ui-monospace,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--ff-sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.no-scroll{overflow:hidden;}
img{max-width:100%;display:block;height:auto;}
a{color:var(--night);text-decoration:none;transition:color .24s var(--ease),border-color .24s var(--ease);}
a:hover{color:var(--gold-deep);}
button{font-family:inherit;}
h1,h2,h3,h4{font-family:var(--ff-serif);color:var(--ink);letter-spacing:-.01em;}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:2px;}
::selection{background:var(--gold-soft);color:var(--night-deep);}

/* ---------- 容器 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.mono{font-family:var(--ff-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(250,249,247,.94);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .32s var(--ease),box-shadow .32s var(--ease),background .32s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,249,247,.98);
  border-bottom-color:var(--line);
  box-shadow:0 1px 2px rgba(14,21,36,.05);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:none;}
.brand-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);flex:none;display:inline-block;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-family:var(--ff-serif);font-size:21px;font-weight:700;color:var(--ink);letter-spacing:-.01em;}
.brand-sub{font-size:11px;letter-spacing:.1em;color:var(--ink-faint);margin-top:3px;}
.main-nav{display:flex;align-items:center;gap:30px;}
.nav-link{
  position:relative;font-size:15px;color:var(--night-mid);
  padding:6px 0;transition:color .24s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--gold);transition:width .24s var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--ink);}
.nav-link.is-active::after{width:100%;}
.nav-link.is-active::before{
  content:"";position:absolute;left:-11px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--gold);
}
.header-actions{display:flex;align-items:center;gap:14px;flex:none;}
.icon-btn{
  width:36px;height:36px;border:1px solid var(--line);border-radius:var(--radius-btn);
  display:inline-flex;align-items:center;justify-content:center;color:var(--night-mid);
  background:transparent;transition:border-color .24s var(--ease),color .24s var(--ease);
}
.icon-btn:hover{border-color:var(--gold);color:var(--ink);}
.menu-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);
  background:transparent;position:relative;cursor:pointer;
}
.menu-toggle span{position:absolute;left:11px;right:11px;height:1.5px;background:var(--ink);transition:transform .3s var(--ease),top .3s var(--ease),bottom .3s var(--ease);}
.menu-toggle span:nth-child(1){top:15px;}
.menu-toggle span:nth-child(2){bottom:15px;}
.menu-toggle.is-open span:nth-child(1){top:19px;transform:rotate(45deg);}
.menu-toggle.is-open span:nth-child(2){bottom:19px;transform:rotate(-45deg);}

.mobile-drawer{
  position:fixed;left:0;right:0;top:60px;bottom:0;z-index:55;
  background:var(--paper);padding:8px 20px 40px;overflow-y:auto;
  opacity:0;transform:translateY(-10px);pointer-events:none;
  transition:opacity .3s var(--ease),transform .3s var(--ease);
}
.mobile-drawer.is-open{opacity:1;transform:none;pointer-events:auto;}
.mobile-drawer a{
  display:block;font-family:var(--ff-serif);font-size:22px;font-weight:600;
  padding:20px 4px;border-bottom:1px solid var(--line);color:var(--ink);
}
.mobile-drawer a:hover{color:var(--gold-deep);}
.mobile-drawer .drawer-note{font-size:13px;color:var(--ink-faint);padding:22px 4px 0;line-height:1.9;}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:500;line-height:1;letter-spacing:.02em;
  padding:14px 28px;border-radius:var(--radius-btn);border:1px solid transparent;
  cursor:pointer;background:transparent;
  transition:background .28s var(--ease),color .28s var(--ease),border-color .28s var(--ease),transform .28s var(--ease);
}
.btn .arrow{display:inline-block;transition:transform .28s var(--ease);}
.btn:hover .arrow{transform:translateX(4px);}
.btn:active{transform:translateY(1px);}
.btn:disabled,.btn.is-disabled{opacity:.45;cursor:not-allowed;transform:none;}
.btn-primary{background:var(--night);color:#fff;}
.btn-primary:hover{background:var(--night-deep);color:#fff;}
.btn-outline{border-color:var(--night);color:var(--night);}
.btn-outline:hover{background:var(--gold-soft);color:var(--night);}
.btn-gold{background:var(--gold);color:var(--night-deep);font-weight:600;}
.btn-gold:hover{background:#D7B96F;color:var(--night-deep);}
.btn-outline-light{border-color:rgba(250,249,247,.4);color:#FAF9F7;}
.btn-outline-light:hover{background:rgba(250,249,247,.1);color:#fff;}
.btn-sm{padding:10px 20px;font-size:14px;}
.btn-text{
  padding:8px 0;color:var(--night);border:none;position:relative;
}
.btn-text::after{
  content:"";position:absolute;left:0;bottom:2px;height:1px;width:100%;
  background:var(--gold);transform:scaleX(.35);transform-origin:left;
  transition:transform .32s var(--ease);
}
.btn-text:hover::after{transform:scaleX(1);}
.btn-text.is-done{color:var(--ok);}

/* ---------- 徽章 / 标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--radius-pill);
  background:var(--gold-soft);border:1px solid rgba(200,165,91,.42);
  color:var(--gold-deep);font-size:12px;font-weight:500;letter-spacing:.04em;line-height:1.5;
}
.badge-plain{background:transparent;border-color:var(--line);color:var(--ink-soft);}
.tag{
  display:inline-block;padding:5px 13px;border:1px solid var(--line);
  border-radius:var(--radius-pill);font-size:12.5px;color:var(--ink-soft);
  letter-spacing:.04em;background:var(--card);transition:border-color .24s var(--ease),color .24s var(--ease);
}
.tag:hover{border-color:var(--gold);color:var(--gold-deep);}

/* ---------- 面包屑 ---------- */
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:26px 0 0;font-size:12.5px;letter-spacing:.06em;color:var(--ink-faint);
  font-family:var(--ff-mono);
}
.breadcrumb a{color:var(--ink-soft);}
.breadcrumb a:hover{color:var(--gold-deep);}
.breadcrumb .sep{color:var(--line);}
.crumb-current{
  color:var(--ink-soft);max-width:60ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}

/* ---------- 文章头部 ---------- */
.article-head{padding:40px 0 44px;border-bottom:1px solid var(--line);}
.article-head-inner{max-width:880px;}
.article-title{
  font-size:clamp(30px,4.2vw,46px);font-weight:700;line-height:1.28;
  margin:20px 0 22px;color:var(--ink);letter-spacing:-.012em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
  font-size:12.5px;letter-spacing:.08em;color:var(--ink-faint);
  font-family:var(--ff-mono);
}
.article-meta .dot{width:3px;height:3px;border-radius:50%;background:var(--gold);flex:none;}

/* ---------- 封面 ---------- */
.article-cover{
  margin:40px 0 0;border-radius:var(--radius);overflow:hidden;
  border:1px solid var(--line);background:var(--paper-alt);
  aspect-ratio:16/9;
}
.article-cover img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(92%) contrast(1.04);
  transition:transform .45s var(--ease);
}
.article-cover:hover img{transform:scale(1.03);}

/* ---------- 正文 ---------- */
.article-wrap{padding:56px 0 88px;}
.article-body{
  max-width:var(--reading);margin:0 auto;
  font-size:17px;line-height:1.85;color:#23272E;
}
.article-body p{margin:0 0 1.4em;}
.article-body h2{
  font-size:clamp(24px,3vw,30px);font-weight:700;line-height:1.35;
  margin:2.4em 0 .8em;color:var(--ink);
}
.article-body h2:first-child{margin-top:0;}
.article-body h2::before{
  content:"";display:block;width:24px;height:2px;background:var(--gold);margin-bottom:16px;
}
.article-body h3{font-size:22px;font-weight:600;margin:1.9em 0 .6em;color:var(--ink);}
.article-body h4{font-size:18px;font-weight:600;margin:1.6em 0 .5em;color:var(--ink);}
.article-body ul,.article-body ol{margin:0 0 1.4em;padding-left:0;list-style:none;}
.article-body ol{counter-reset:ol;padding-left:0;}
.article-body ol>li{
  counter-increment:ol;position:relative;padding-left:32px;margin:.55em 0;
}
.article-body ol>li::before{
  content:counter(ol,decimal-leading-zero);
  position:absolute;left:0;top:.1em;font-family:var(--ff-mono);font-size:12.5px;
  letter-spacing:.06em;color:var(--gold-deep);
}
.article-body ul>li{position:relative;padding-left:20px;margin:.55em 0;}
.article-body ul>li::before{
  content:"";position:absolute;left:2px;top:.72em;width:6px;height:6px;background:var(--gold);
}
.article-body li>ul,.article-body li>ol{margin:.4em 0 .2em;}
.article-body blockquote{
  margin:1.8em 0;padding:18px 24px;border-left:2px solid var(--gold);
  background:var(--paper-alt);color:var(--ink-soft);border-radius:0 var(--radius) var(--radius) 0;
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body img{border-radius:var(--radius);margin:1.7em 0;filter:saturate(92%) contrast(1.04);}
.article-body figure{margin:1.9em 0;}
.article-body figure img{margin:0;}
.article-body figcaption{
  font-size:13px;color:var(--ink-faint);text-align:center;margin-top:12px;line-height:1.7;
}
.article-body a{
  color:var(--night);border-bottom:1px solid var(--gold);padding-bottom:1px;
}
.article-body a:hover{color:var(--gold-deep);border-bottom-color:var(--gold-deep);}
.article-body table{
  width:100%;border-collapse:collapse;margin:1.7em 0;font-size:15px;
  border-top:1px solid var(--line);
}
.article-body th,.article-body td{
  border-bottom:1px solid var(--line);padding:12px 10px;text-align:left;vertical-align:top;
}
.article-body th{font-weight:600;color:var(--ink);background:var(--paper-alt);}
.article-body code{
  font-family:var(--ff-mono);font-size:14px;background:var(--paper-alt);
  padding:2px 6px;border-radius:2px;color:var(--night);
}
.article-body hr{border:none;border-top:1px solid var(--line);margin:2.4em 0;}
.article-body strong{font-weight:600;}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:560px;margin:0 auto;padding:56px 32px;text-align:center;
  border:1px solid var(--line);border-radius:var(--radius);background:var(--card);
}
.empty-state::before{
  content:"";display:block;width:8px;height:8px;border-radius:50%;
  background:var(--gold);margin:0 auto 22px;
  box-shadow:0 0 0 7px rgba(200,165,91,.12);
}
.empty-title{font-size:22px;font-weight:700;margin:0 0 10px;color:var(--ink);}
.empty-desc{font-size:15px;line-height:1.9;color:var(--ink-soft);margin:0 0 26px;}

/* ---------- 文末标签 / 操作 ---------- */
.article-foot{max-width:var(--reading);margin:0 auto;}
.tag-row{
  display:flex;flex-wrap:wrap;gap:10px;
  margin-top:48px;padding-top:26px;border-top:1px solid var(--line);
}
.article-actions{
  display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:28px;
  padding:18px 0 0;border-top:1px solid var(--line);
}
.article-actions .share-hint{
  font-size:12.5px;font-family:var(--ff-mono);letter-spacing:.06em;color:var(--ink-faint);
}

/* ---------- 分类入口列表 ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--paper-alt);}
.section-head{margin-bottom:40px;max-width:720px;}
.section-eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--gold-deep);
  font-family:var(--ff-mono);margin-bottom:14px;
}
.section-eyebrow::before{content:"";width:22px;height:1px;background:var(--gold);}
.section-title{font-size:clamp(24px,3vw,32px);font-weight:700;line-height:1.35;margin:0 0 12px;}
.section-sub{font-size:15px;color:var(--ink-soft);margin:0;line-height:1.85;}
.link-list{border-top:1px solid var(--line);}
.link-list a{
  display:grid;grid-template-columns:60px minmax(0,1fr) 26px;
  align-items:center;gap:18px;padding:22px 10px;
  border-bottom:1px solid var(--line);transition:background .3s var(--ease);
}
.link-list a:hover{background:var(--paper-alt);}
.ll-idx{
  font-family:var(--ff-mono);font-size:12.5px;letter-spacing:.08em;color:var(--gold-deep);
}
.ll-t{font-family:var(--ff-serif);font-size:19px;font-weight:600;color:var(--ink);}
.ll-d{font-size:14px;color:var(--ink-faint);margin-top:4px;line-height:1.7;}
.ll-a{
  font-size:16px;color:var(--gold);justify-self:end;
  transition:transform .3s var(--ease);
}
.link-list a:hover .ll-a{transform:translateX(4px);}

/* ---------- 深色 CTA ---------- */
.cta-dark{
  position:relative;overflow:hidden;background:var(--night-deep);color:rgba(250,249,247,.76);
  padding:88px 0;
}
.cta-inner{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:36px;
  position:relative;z-index:2;
}
.cta-dark h2{
  font-size:clamp(24px,3vw,34px);font-weight:700;color:#fff;margin:0 0 14px;line-height:1.35;
}
.cta-dark p{margin:0;font-size:15px;line-height:1.9;max-width:52ch;color:rgba(250,249,247,.72);}
.cta-actions{display:flex;flex-wrap:wrap;gap:16px;}
.cta-stars{position:absolute;inset:0;pointer-events:none;z-index:1;}
.cta-stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--gold);opacity:.5;}
.cta-stars i:nth-child(1){top:34px;right:14%;}
.cta-stars i:nth-child(2){top:96px;right:26%;opacity:.28;}
.cta-stars i:nth-child(3){bottom:52px;right:8%;opacity:.35;}

/* ---------- 提示条 ---------- */
.toast{
  position:fixed;left:50%;bottom:36px;transform:translate(-50%,14px);
  background:var(--night-deep);color:#FAF9F7;font-size:14px;letter-spacing:.02em;
  padding:12px 22px;border-radius:var(--radius-btn);border:1px solid rgba(200,165,91,.4);
  opacity:0;pointer-events:none;transition:opacity .3s var(--ease),transform .3s var(--ease);
  z-index:80;max-width:calc(100% - 40px);text-align:center;
}
.toast.is-show{opacity:1;transform:translate(-50%,0);}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;background:var(--night-deep);color:rgba(250,249,247,.7);
  padding:76px 0 28px;font-size:14px;overflow:hidden;
}
.footer-grid{
  display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:44px;
  position:relative;z-index:2;
}
.footer-col h4{
  font-family:var(--ff-sans);font-size:13px;font-weight:600;letter-spacing:.1em;
  color:#fff;margin:0 0 18px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;font-family:var(--ff-serif);
  font-size:20px;font-weight:700;color:#fff;margin-bottom:16px;
}
.footer-col p{margin:0 0 12px;line-height:1.9;font-size:14px;}
.footer-links{list-style:none;margin:0;padding:0;}
.footer-links li{margin:0 0 11px;}
.footer-links a{position:relative;color:rgba(250,249,247,.7);font-size:14px;padding-bottom:2px;}
.footer-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;
  background:var(--gold);transition:width .28s var(--ease);
}
.footer-links a:hover{color:#fff;}
.footer-links a:hover::after{width:100%;}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  margin-top:58px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:rgba(250,249,247,.48);position:relative;z-index:2;
}
.footer-stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--gold);}
.footer-stars i:nth-child(1){top:54px;right:12%;opacity:.55;}
.footer-stars i:nth-child(2){top:132px;right:23%;opacity:.28;}
.footer-stars i:nth-child(3){bottom:96px;left:7%;opacity:.34;}
.footer-stars i:nth-child(4){top:44px;left:32%;opacity:.22;}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
  .container{padding:0 22px;}
  .main-nav{gap:24px;}
}
@media (max-width:992px){
  .main-nav{gap:18px;}
  .nav-link{font-size:14px;}
  .header-actions .btn-sm{display:none;}
  .section{padding:80px 0;}
  .article-wrap{padding:48px 0 72px;}
  .footer-grid{grid-template-columns:1.5fr 1fr 1fr;gap:34px;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .container{padding:0 18px;}
  .header-inner{height:60px;}
  .main-nav{display:none;}
  .menu-toggle{display:block;}
  .brand-name{font-size:19px;}
  .brand-sub{font-size:10px;letter-spacing:.08em;}
  .breadcrumb{padding-top:18px;}
  .crumb-current{white-space:normal;}
  .article-head{padding:26px 0 32px;}
  .article-title{margin:16px 0 18px;}
  .article-cover{margin-top:28px;}
  .article-wrap{padding:40px 0 64px;}
  .article-body h2{margin-top:2em;}
  .section{padding:56px 0;}
  .link-list a{grid-template-columns:44px minmax(0,1fr) 22px;gap:14px;padding:18px 4px;}
  .ll-t{font-size:17px;}
  .cta-dark{padding:64px 0;}
  .cta-inner{gap:26px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px;padding-bottom:10px;}
  .footer-brand{margin-bottom:12px;}
  .site-footer{padding:56px 0 24px;}
  .footer-bottom{margin-top:40px;}
}
@media (max-width:560px){
  .container{padding:0 16px;}
  .article-meta{font-size:11.5px;gap:9px;}
  .article-body h3{font-size:19px;}
  .article-actions{gap:14px;}
  .btn{padding:13px 22px;font-size:14.5px;}
  .btn-sm{padding:10px 16px;}
  .section-head{margin-bottom:28px;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 auto;justify-content:center;}
}
@media (max-width:420px){
  .article-title{font-size:27px;}
  .brand-sub{display:none;}
  .link-list a{grid-template-columns:38px minmax(0,1fr);}
  .ll-a{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category1 */
/* ============================================================
   设计变量
   ============================================================ */
:root{
  --ink:#1E2A4A;
  --ink-deep:#0E1524;
  --ink-mid:#3D4A6B;
  --gold:#C8A55B;
  --gold-soft:#F0E6D2;
  --paper:#FAF9F7;
  --paper-alt:#F2F0EB;
  --card:#FFFFFF;
  --text:#1A1D23;
  --text-2:#5B6270;
  --text-3:#8B919C;
  --line:#E5E2DB;
  --ok:#3F7A5E;
  --warn:#B8862F;
  --err:#A8402F;

  --r-card:4px;
  --r-btn:2px;
  --r-pill:999px;

  --sh-1:0 1px 2px rgba(14,21,36,.05);
  --sh-2:0 12px 28px -14px rgba(14,21,36,.20);

  --container:1200px;
  --container-wide:1280px;

  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,serif;
  --sans:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,1,.36,1);
}

/* ============================================================
   基础 reset
   ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:96px}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  color:var(--text);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none;transition:color .24s var(--ease)}
a:hover{color:var(--ink-deep)}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.25;letter-spacing:-.01em;color:var(--ink);margin:0}
p{margin:0 0 1.4em}
p:last-child{margin-bottom:0}
::selection{background:var(--gold-soft);color:var(--ink-deep)}

a:focus-visible,
button:focus-visible,
input:focus-visible,
summary:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
}

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

/* ============================================================
   头部导航
   ============================================================ */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  height:72px;
  background:rgba(250,249,247,0);
  border-bottom:1px solid transparent;
  transition:background .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,249,247,.96);
  backdrop-filter:saturate(160%) blur(8px);
  border-bottom:1px solid var(--line);
  box-shadow:var(--sh-1);
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.brand-dot{
  width:6px;height:6px;border-radius:50%;
  background:var(--gold);
  display:inline-block;
  flex-shrink:0;
}
.brand-text{
  font-family:var(--serif);
  font-size:21px;
  font-weight:700;
  letter-spacing:.02em;
  color:var(--ink-deep);
}
.brand-sub{
  display:block;
  font-family:var(--sans);
  font-size:11px;
  letter-spacing:.1em;
  color:var(--text-3);
  margin-top:-2px;
  white-space:nowrap;
}
.brand-wrap{display:flex;flex-direction:column}

.main-nav{display:flex;align-items:center;gap:30px}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--ink-mid);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{
  color:var(--ink-deep);
  font-weight:500;
}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active::before{
  content:"";
  position:absolute;
  left:-12px;
  top:50%;
  width:5px;height:5px;
  margin-top:-2.5px;
  border-radius:50%;
  background:var(--gold);
}

.header-tools{display:flex;align-items:center;gap:16px;flex-shrink:0}
.icon-btn{
  width:36px;height:36px;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
  color:var(--ink-mid);
  background:transparent;
  transition:border-color .24s var(--ease),color .24s var(--ease),background .24s var(--ease);
}
.icon-btn:hover{border-color:var(--gold);color:var(--ink-deep);background:var(--card)}
.icon-btn svg{width:16px;height:16px}

.nav-toggle{
  display:none;
  width:36px;height:36px;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:6px;
  border:1px solid var(--line);
  border-radius:var(--r-btn);
}
.nav-toggle span{
  display:block;
  width:17px;height:1px;
  background:var(--ink-mid);
  transition:transform .28s var(--ease),opacity .28s var(--ease);
}
.nav-toggle.is-open span:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-toggle.is-open span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:14px 28px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:500;
  line-height:1.2;
  border:1px solid transparent;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .18s var(--ease),box-shadow .24s var(--ease);
}
.btn .arrow{transition:transform .24s var(--ease);display:inline-block}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--ink-deep);color:#fff;box-shadow:var(--sh-2)}
.btn-ghost{background:transparent;border-color:var(--ink);color:var(--ink)}
.btn-ghost:hover{background:var(--gold-soft);color:var(--ink-deep);border-color:var(--gold)}
.btn-light{background:transparent;border-color:rgba(250,249,247,.55);color:#FAF9F7}
.btn-light:hover{background:rgba(250,249,247,.1);border-color:var(--gold);color:#fff}
.btn:active{transform:translateY(1px)}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none}
.btn-sm{padding:10px 20px;font-size:14px}

/* ============================================================
   Hero
   ============================================================ */
.hero{
  position:relative;
  min-height:620px;
  display:flex;
  align-items:center;
  overflow:hidden;
  background:var(--ink-deep);
  color:#FAF9F7;
  margin-top:-72px;
  padding-top:72px;
}
.hero-bg{
  position:absolute;
  inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center 38%;
  filter:saturate(.92) contrast(1.04);
  transform:scale(1.03);
}
.hero-veil{
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(14,21,36,.80) 0%,rgba(14,21,36,.66) 46%,rgba(14,21,36,.62) 72%,rgba(250,249,247,.98) 100%);
}
.hero-stars{
  position:absolute;
  right:48px;
  bottom:88px;
  width:180px;
  height:120px;
  pointer-events:none;
  z-index:2;
}
.hero-stars i{
  position:absolute;
  width:3px;height:3px;
  border-radius:50%;
  background:var(--gold);
  opacity:.45;
  animation:twinkle 6s ease-in-out infinite;
}
.hero-stars i:nth-child(1){top:12%;left:18%;animation-delay:0s}
.hero-stars i:nth-child(2){top:44%;left:62%;width:2px;height:2px;animation-delay:1.4s}
.hero-stars i:nth-child(3){top:72%;left:30%;animation-delay:2.6s}
.hero-stars i:nth-child(4){top:24%;left:84%;width:2px;height:2px;animation-delay:3.8s}
.hero-stars i:nth-child(5){top:82%;left:74%;animation-delay:4.6s}
@keyframes twinkle{
  0%,100%{opacity:.22}
  50%{opacity:.72}
}
.hero-inner{
  position:relative;
  z-index:3;
  width:100%;
  padding-top:96px;
  padding-bottom:104px;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  letter-spacing:.04em;
  color:rgba(250,249,247,.66);
  margin-bottom:34px;
}
.breadcrumb a{color:rgba(250,249,247,.66)}
.breadcrumb a:hover{color:var(--gold)}
.breadcrumb .sep{color:rgba(250,249,247,.35)}
.breadcrumb .current{color:rgba(250,249,247,.9)}

.hero-kicker{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--gold);
  margin:0 0 20px;
  font-family:var(--sans);
  font-weight:500;
}
.hero-kicker::before{
  content:"";
  width:22px;height:1px;
  background:var(--gold);
  display:inline-block;
}
.hero h1{
  font-family:var(--serif);
  font-size:clamp(34px,5vw,56px);
  font-weight:700;
  line-height:1.22;
  color:#fff;
  max-width:760px;
  margin:0 0 22px;
}
.hero-sub{
  font-size:17px;
  color:rgba(250,249,247,.80);
  max-width:720px;
  margin:0 0 38px;
}
.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-bottom:56px;
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  gap:56px;
  border-top:1px solid rgba(250,249,247,.22);
  padding-top:26px;
  max-width:760px;
}
.stat-num{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  font-size:28px;
  font-weight:600;
  color:#fff;
  letter-spacing:.02em;
  display:block;
  line-height:1.2;
}
.stat-label{
  font-size:12.5px;
  letter-spacing:.08em;
  color:rgba(250,249,247,.62);
}

/* ============================================================
   通用板块
   ============================================================ */
.section{padding:110px 0}
.section-alt{background:var(--paper-alt)}
.section-tight{padding:84px 0}

.section-head{margin-bottom:56px;max-width:760px}
.section-head .eyebrow{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:12.5px;
  letter-spacing:.12em;
  color:var(--gold);
  margin-bottom:16px;
}
.section-head .eyebrow::before{
  content:"";
  width:22px;height:1px;
  background:var(--gold);
}
.section-head h2{
  font-size:clamp(26px,3.2vw,36px);
  margin-bottom:16px;
}
.section-head p{
  color:var(--text-2);
  font-size:16px;
  margin:0;
}
.section-head--row{
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:32px;
  max-width:none;
  flex-wrap:wrap;
}
.text-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:14.5px;
  color:var(--ink);
  border-bottom:1px solid var(--line);
  padding-bottom:2px;
  transition:border-color .24s var(--ease),color .24s var(--ease);
}
.text-link:hover{border-color:var(--gold);color:var(--ink-deep)}
.text-link .arrow{transition:transform .24s var(--ease)}
.text-link:hover .arrow{transform:translateX(4px)}

/* ============================================================
   步骤区
   ============================================================ */
.step-list{
  border-top:1px solid var(--line);
}
.step-item{
  display:grid;
  grid-template-columns:112px 1fr 40px;
  gap:28px;
  align-items:start;
  padding:30px 12px;
  border-bottom:1px solid var(--line);
  transition:background .28s var(--ease),padding .28s var(--ease);
}
.step-item:hover{background:var(--paper-alt)}
.step-no{
  font-family:var(--serif);
  font-size:40px;
  font-weight:600;
  line-height:1;
  color:var(--gold);
  letter-spacing:-.02em;
  padding-top:4px;
}
.step-body h3{
  font-size:22px;
  margin-bottom:10px;
}
.step-body p{
  margin:0;
  color:var(--text-2);
  font-size:16px;
  max-width:820px;
}
.step-arrow{
  align-self:center;
  color:var(--text-3);
  font-size:18px;
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.step-item:hover .step-arrow{transform:translateX(4px);color:var(--gold)}

/* ============================================================
   说明区（密集段落）
   ============================================================ */
.notes-grid{
  display:grid;
  grid-template-columns:5fr 7fr;
  gap:72px;
  align-items:start;
}
.notes-figure{
  position:sticky;
  top:104px;
}
.notes-figure img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  filter:saturate(.92) contrast(1.04);
}
.notes-figure figcaption{
  font-size:13px;
  color:var(--text-3);
  margin-top:12px;
  text-align:center;
}
.notes-body h3{
  font-size:24px;
  margin:0 0 18px;
}
.notes-body h3 + p{margin-top:0}
.notes-body p{color:var(--text-2);font-size:16.5px}
.notes-body h4{
  font-size:18px;
  margin:36px 0 14px;
  font-weight:600;
}
.check-list{margin:0 0 8px}
.check-list li{
  position:relative;
  padding:12px 0 12px 26px;
  border-bottom:1px solid var(--line);
  font-size:15.5px;
  color:var(--text-2);
}
.check-list li:first-child{border-top:1px solid var(--line)}
.check-list li::before{
  content:"";
  position:absolute;
  left:0;top:50%;
  width:8px;height:1px;
  background:var(--gold);
  margin-top:-.5px;
}
.note-card{
  border:1px solid var(--line);
  background:var(--card);
  border-radius:var(--r-card);
  padding:26px 28px;
  margin-top:34px;
  box-shadow:var(--sh-1);
}
.note-card h4{margin:0 0 10px;font-size:17px}
.note-card p{font-size:15px;color:var(--text-2);margin:0}

/* ============================================================
   徽章
   ============================================================ */
.badge{
  display:inline-flex;
  align-items:center;
  padding:5px 13px;
  border-radius:var(--r-pill);
  font-size:12px;
  letter-spacing:.04em;
  border:1px solid var(--gold);
  color:var(--warn);
  background:var(--gold-soft);
  line-height:1.5;
}
.badge-plain{
  border-color:var(--line);
  background:transparent;
  color:var(--text-2);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  padding:26px 4px;
  cursor:pointer;
  font-family:var(--serif);
  font-size:20px;
  font-weight:600;
  color:var(--ink);
  list-style:none;
  transition:color .24s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--ink-deep)}
.faq-mark{
  flex-shrink:0;
  width:22px;height:22px;
  position:relative;
  transition:transform .3s var(--ease);
}
.faq-mark::before,
.faq-mark::after{
  content:"";
  position:absolute;
  background:var(--gold);
}
.faq-mark::before{left:0;right:0;top:50%;height:1px;margin-top:-.5px}
.faq-mark::after{top:0;bottom:0;left:50%;width:1px;margin-left:-.5px}
.faq-item[open] .faq-mark{transform:rotate(45deg)}
.faq-answer{
  padding:0 60px 30px 4px;
  font-size:16px;
  line-height:1.8;
  color:var(--text-2);
  max-width:820px;
}
.faq-answer p{margin:0}

/* ============================================================
   相关分类
   ============================================================ */
.related-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0 48px;
  border-top:1px solid var(--line);
}
.related-link{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:26px 8px;
  border-bottom:1px solid var(--line);
  transition:padding .28s var(--ease),background .28s var(--ease);
}
.related-link:hover{padding-left:16px;background:var(--paper-alt)}
.related-link .rl-text{display:flex;flex-direction:column;gap:4px}
.related-link .rl-title{
  font-family:var(--serif);
  font-size:18px;
  font-weight:600;
  color:var(--ink);
}
.related-link .rl-desc{
  font-size:13.5px;
  color:var(--text-3);
}
.related-link .rl-arrow{
  color:var(--text-3);
  transition:transform .24s var(--ease),color .24s var(--ease);
}
.related-link:hover .rl-arrow{transform:translateX(4px);color:var(--gold)}

/* ============================================================
   收尾 CTA
   ============================================================ */
.cta-band{
  background:var(--ink-deep);
  color:rgba(250,249,247,.78);
  padding:96px 0;
  position:relative;
  overflow:hidden;
}
.cta-band .container{position:relative;z-index:2}
.cta-band h2{
  color:#fff;
  font-size:clamp(26px,3.2vw,36px);
  margin-bottom:16px;
}
.cta-band p{
  max-width:620px;
  font-size:16px;
  color:rgba(250,249,247,.72);
  margin-bottom:34px;
}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}
.cta-stars{
  position:absolute;
  right:40px;
  top:44px;
  width:160px;height:110px;
  pointer-events:none;
}
.cta-stars i{
  position:absolute;
  width:3px;height:3px;
  border-radius:50%;
  background:var(--gold);
  opacity:.35;
}
.cta-stars i:nth-child(1){top:10%;left:20%}
.cta-stars i:nth-child(2){top:52%;left:68%;width:2px;height:2px}
.cta-stars i:nth-child(3){top:78%;left:34%}
.cta-stars i:nth-child(4){top:28%;left:88%;width:2px;height:2px}

/* ============================================================
   空态 / 状态
   ============================================================ */
.empty-state{
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--card);
  padding:56px 32px;
  text-align:center;
}
.empty-state p{color:var(--text-2);margin-bottom:16px}

/* ============================================================
   页脚
   ============================================================ */
.site-footer{
  position:relative;
  background:var(--ink-deep);
  color:rgba(250,249,247,.70);
  padding:88px 0 32px;
  overflow:hidden;
  font-size:14px;
}
.footer-stars{
  position:absolute;
  right:56px;
  top:52px;
  width:150px;height:100px;
  pointer-events:none;
}
.footer-stars i{
  position:absolute;
  width:3px;height:3px;
  border-radius:50%;
  background:var(--gold);
  opacity:.3;
}
.footer-stars i:nth-child(1){top:8%;left:24%}
.footer-stars i:nth-child(2){top:46%;left:66%;width:2px;height:2px}
.footer-stars i:nth-child(3){top:74%;left:36%}
.footer-stars i:nth-child(4){top:22%;left:88%;width:2px;height:2px}
.site-footer .container{position:relative;z-index:2}
.footer-grid{
  display:grid;
  grid-template-columns:1.6fr 1fr 1fr 1fr;
  gap:56px;
}
.footer-col h4{
  font-family:var(--sans);
  font-size:13px;
  letter-spacing:.1em;
  color:rgba(250,249,247,.92);
  font-weight:500;
  margin-bottom:20px;
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-family:var(--serif);
  font-size:20px;
  font-weight:700;
  color:#FAF9F7;
  margin-bottom:16px;
}
.footer-col p{font-size:14px;line-height:1.8;margin-bottom:12px;color:rgba(250,249,247,.66)}
.footer-links li{margin-bottom:12px}
.footer-links a{
  color:rgba(250,249,247,.70);
  position:relative;
  display:inline-block;
  transition:color .24s var(--ease);
}
.footer-links a::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:-3px;
  height:1px;
  background:var(--gold);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .24s var(--ease);
}
.footer-links a:hover{color:#fff}
.footer-links a:hover::after{transform:scaleX(1)}
.footer-bottom{
  margin-top:64px;
  padding-top:26px;
  border-top:1px solid rgba(250,249,247,.14);
  display:flex;
  flex-wrap:wrap;
  gap:12px 32px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(250,249,247,.52);
}
.mono{
  font-family:var(--mono);
  font-variant-numeric:tabular-nums;
  letter-spacing:.02em;
}

/* ============================================================
   进场动效
   ============================================================ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity .42s var(--ease),transform .42s var(--ease);
}
.reveal.is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  .reveal{opacity:1;transform:none}
}

/* ============================================================
   移动端抽屉
   ============================================================ */
.drawer{
  position:fixed;
  inset:0;
  z-index:70;
  background:var(--paper);
  padding:96px 24px 40px;
  display:none;
  flex-direction:column;
  gap:0;
  overflow-y:auto;
}
.drawer.is-open{display:flex}
.drawer a{
  font-family:var(--serif);
  font-size:22px;
  color:var(--ink);
  padding:20px 0;
  border-bottom:1px solid var(--line);
}
.drawer a.is-active{color:var(--ink-deep)}
.drawer a.is-active::before{
  content:"";
  display:inline-block;
  width:6px;height:6px;
  border-radius:50%;
  background:var(--gold);
  margin-right:12px;
  vertical-align:middle;
}
.drawer .drawer-foot{
  margin-top:auto;
  padding-top:32px;
  font-size:13px;
  color:var(--text-3);
}

/* ============================================================
   响应式
   ============================================================ */
@media (min-width:1440px){
  .container{max-width:var(--container-wide)}
}

@media (max-width:1199px){
  .notes-grid{gap:48px}
}

@media (max-width:1024px){
  .main-nav{display:none}
  .nav-toggle{display:flex}
  .hero{min-height:560px}
  .notes-grid{grid-template-columns:1fr;gap:40px}
  .notes-figure{position:static}
  .footer-grid{grid-template-columns:1fr 1fr;gap:44px}
  .related-row{grid-template-columns:1fr;gap:0}
  .step-item{grid-template-columns:88px 1fr 32px;gap:20px}
  .step-no{font-size:34px}
}

@media (max-width:768px){
  body{font-size:16px}
  .section{padding:72px 0}
  .section-tight{padding:60px 0}
  .container{padding:0 20px}
  .hero{min-height:520px;padding-top:60px}
  .hero-inner{padding-top:72px;padding-bottom:80px}
  .hero-stats{gap:32px}
  .stat-num{font-size:24px}
  .hero-stars{width:120px;height:90px;right:20px;bottom:64px}
  .step-item{grid-template-columns:1fr;gap:12px;padding:26px 4px}
  .step-no{font-size:30px}
  .step-arrow{display:none}
  .faq-item summary{font-size:18px;padding:22px 0}
  .faq-answer{padding:0 0 24px}
  .cta-band{padding:72px 0}
  .cta-stars{display:none}
  .site-footer{padding:64px 0 28px}
  .footer-grid{grid-template-columns:1fr;gap:36px}
  .footer-bottom{margin-top:44px}
  .section-head{margin-bottom:40px}
}

@media (max-width:560px){
  .hero h1{font-size:clamp(28px,8vw,36px)}
  .hero-actions{flex-direction:column;align-items:stretch}
  .hero-actions .btn{justify-content:center}
  .hero-sub{font-size:15.5px}
  .hero-stats{flex-direction:column;gap:18px}
  .brand-text{font-size:19px}
  .nav-link{padding:5px 0}
}

@media (max-width:420px){
  .container{padding:0 16px}
  .hero-inner{padding-top:64px;padding-bottom:64px}
  .step-no{font-size:26px}
  .btn{padding:13px 22px;font-size:14.5px}
  .cta-actions{flex-direction:column;align-items:stretch}
  .cta-actions .btn{justify-content:center}
}

/* roulang page: category2 */
:root{
  --ink:#1E2A4A;
  --ink-deep:#0E1524;
  --ink-mid:#3D4A6B;
  --gold:#C8A55B;
  --gold-soft:#F0E6D2;
  --paper:#FAF9F7;
  --paper-alt:#F2F0EB;
  --card:#FFFFFF;
  --text:#1A1D23;
  --text-2:#5B6270;
  --text-3:#8B919C;
  --line:#E5E2DB;
  --ok:#3F7A5E;
  --warn:#B8862F;
  --err:#A8402F;
  --r-card:4px;
  --r-btn:2px;
  --sh-1:0 1px 2px rgba(14,21,36,.05);
  --sh-2:0 12px 28px -14px rgba(14,21,36,.20);
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"Inter",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --container:1200px;
  --nav-h:72px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  letter-spacing:0;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-radius:var(--r-card)}
a{color:var(--ink);text-decoration:none;transition:color .24s var(--ease),border-color .24s var(--ease)}
a:hover{color:var(--gold)}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.25;letter-spacing:-.01em;color:var(--ink);margin:0}
p{margin:0 0 1.4em}
p:last-child{margin-bottom:0}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--gold);
  outline-offset:2px;
  border-radius:2px;
}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em}
.section{padding:104px 0}
.section--tight{padding:80px 0}
.section--alt{background:var(--paper-alt)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:48px}
.section-head h2{font-size:clamp(26px,3vw,36px)}
.section-head h2::before{
  content:"";display:inline-block;width:24px;height:2px;background:var(--gold);
  vertical-align:middle;margin-right:14px;transform:translateY(-6px);
}
.section-head .sub{color:var(--text-2);font-size:15px;margin-top:10px}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,249,247,0);
  border-bottom:1px solid transparent;
  transition:background .28s var(--ease),border-color .28s var(--ease),box-shadow .28s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,249,247,.96);
  backdrop-filter:saturate(140%) blur(6px);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  height:var(--nav-h);
  display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:12px;color:var(--ink)}
.brand-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);flex:0 0 6px;display:inline-block}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-family:var(--serif);font-size:20px;font-weight:700;letter-spacing:.02em}
.brand-sub{font-size:11px;letter-spacing:.1em;color:var(--text-3);font-weight:400}
.main-nav{display:flex;align-items:center;gap:34px}
.nav-link{
  position:relative;font-size:15px;color:var(--ink-mid);padding:6px 0;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--gold);
  transition:width .24s var(--ease);
}
.nav-link:hover{color:var(--text)}
.nav-link:hover::after{width:100%}
.nav-link.is-active{color:var(--ink);font-weight:500}
.nav-link.is-active::after{width:100%}
.nav-link.is-active::before{
  content:"";position:absolute;left:-11px;top:50%;width:5px;height:5px;border-radius:50%;
  background:var(--gold);transform:translateY(-50%);
}
.header-actions{display:flex;align-items:center;gap:14px}
.icon-btn{
  width:36px;height:36px;border:1px solid var(--line);border-radius:2px;
  display:flex;align-items:center;justify-content:center;color:var(--ink-mid);
  transition:border-color .24s var(--ease),color .24s var(--ease),transform .24s var(--ease);
}
.icon-btn:hover{border-color:var(--gold);color:var(--ink)}
.icon-btn:active{transform:translateY(1px)}
.nav-burger{
  display:none;width:40px;height:40px;flex-direction:column;justify-content:center;gap:6px;
  align-items:center;border:1px solid var(--line);border-radius:2px;
}
.nav-burger span{display:block;width:18px;height:1px;background:var(--ink);transition:transform .28s var(--ease),opacity .2s}
.nav-burger.is-open span:first-child{transform:translateY(3.5px) rotate(45deg)}
.nav-burger.is-open span:last-child{transform:translateY(-3.5px) rotate(-45deg)}

/* 移动抽屉 */
.drawer{
  position:fixed;inset:var(--nav-h) 0 0 0;background:var(--paper);z-index:79;
  padding:32px 24px;transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease);
  overflow-y:auto;
}
.drawer.is-open{opacity:1;transform:none;pointer-events:auto}
.drawer a{
  display:block;font-family:var(--serif);font-size:22px;padding:20px 0;
  border-bottom:1px solid var(--line);color:var(--ink);
}
.drawer a.is-active{color:var(--gold)}

/* ============ Hero ============ */
.hero{
  position:relative;min-height:620px;display:flex;align-items:flex-end;
  background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,21,36,.74) 0%,rgba(14,21,36,.6) 45%,rgba(14,21,36,.66) 70%,rgba(250,249,247,.96) 100%);
}
.hero-inner{position:relative;z-index:2;padding:150px 0 72px;max-width:760px}
.hero-crumb{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;color:rgba(250,249,247,.68);
  margin-bottom:22px;text-transform:none;
}
.hero-crumb a{color:rgba(250,249,247,.78)}
.hero-crumb a:hover{color:var(--gold)}
.hero-crumb .sep{margin:0 8px;color:rgba(250,249,247,.4)}
.hero h1{
  color:#FAF9F7;font-size:clamp(34px,5vw,54px);font-weight:700;letter-spacing:-.01em;
}
.hero-sub{color:rgba(250,249,247,.82);font-size:18px;margin:20px 0 34px;max-width:30ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:52px;margin-top:56px;padding-top:26px;
  border-top:1px solid rgba(250,249,247,.28);
}
.hero-metrics .m-num{font-family:var(--mono);font-size:26px;color:#FAF9F7;font-variant-numeric:tabular-nums}
.hero-metrics .m-label{font-size:12.5px;letter-spacing:.08em;color:rgba(250,249,247,.62)}
.hero-stars{position:absolute;right:6%;bottom:14%;z-index:1;pointer-events:none}
.hero-stars i{
  position:absolute;display:block;width:4px;height:4px;border-radius:50%;background:var(--gold);
  animation:twinkle 6s ease-in-out infinite;
}
.hero-stars i:nth-child(1){top:0;left:0;animation-delay:0s}
.hero-stars i:nth-child(2){top:26px;left:44px;width:3px;height:3px;animation-delay:1.6s}
.hero-stars i:nth-child(3){top:58px;left:16px;width:2px;height:2px;animation-delay:3.1s}
.hero-stars i:nth-child(4){top:12px;left:78px;width:2.5px;height:2.5px;animation-delay:4.4s}
@keyframes twinkle{0%,100%{opacity:.28}50%{opacity:1}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background .24s var(--ease),border-color .24s var(--ease),color .24s var(--ease),transform .18s var(--ease);
}
.btn .arrow{transition:transform .24s var(--ease)}
.btn:hover .arrow{transform:translateX(4px)}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--ink-deep);color:#fff}
.btn-primary:active{transform:translateY(1px)}
.btn-ghost{border-color:rgba(250,249,247,.5);color:#FAF9F7;background:transparent}
.btn-ghost:hover{background:var(--gold-soft);color:var(--ink);border-color:var(--gold-soft)}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-outline:hover{background:var(--gold-soft);border-color:var(--gold);color:var(--ink)}
.btn-text{
  color:var(--ink);padding:6px 0;border-bottom:1px solid transparent;
}
.btn-text:hover{color:var(--gold);border-color:var(--gold)}
.btn:disabled,.btn.is-disabled{opacity:.45;cursor:not-allowed}

/* ============ 目录主区 ============ */
.catalog{display:grid;grid-template-columns:4fr 8fr;gap:56px;align-items:start}
.catalog-index{position:sticky;top:calc(var(--nav-h) + 32px)}
.index-title{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.08em;color:var(--text-3);
  padding-bottom:14px;border-bottom:1px solid var(--line);margin-bottom:8px;
}
.index-list li a{
  display:flex;align-items:center;gap:12px;
  padding:13px 12px 13px 14px;border-bottom:1px solid var(--line);
  color:var(--ink-mid);font-size:15px;
  transition:background .24s var(--ease),color .24s var(--ease),padding-left .24s var(--ease);
}
.index-list li a .dot{
  width:5px;height:5px;border-radius:50%;background:transparent;flex:0 0 5px;
  transition:background .24s var(--ease);
}
.index-list li a:hover{background:var(--paper-alt);color:var(--ink);padding-left:18px}
.index-list li a.is-current{color:var(--ink);font-weight:500;padding-left:18px}
.index-list li a.is-current .dot{background:var(--gold)}
.index-note{
  margin-top:22px;padding:16px;border:1px solid var(--line);border-radius:var(--r-card);
  font-size:13.5px;color:var(--text-2);line-height:1.75;background:var(--card);
}
.index-note .mono{color:var(--ink)}

.entry-group{margin-bottom:56px}
.entry-group:last-child{margin-bottom:0}
.group-head{display:flex;align-items:baseline;gap:14px;padding-bottom:16px;border-bottom:2px solid var(--ink)}
.group-head .g-no{font-family:var(--mono);font-size:13px;color:var(--gold);letter-spacing:.08em}
.group-head h3{font-size:23px}
.group-head .g-count{margin-left:auto;font-family:var(--mono);font-size:12.5px;color:var(--text-3);letter-spacing:.08em}

.entry-row{
  display:grid;grid-template-columns:44px 120px 1fr 26px;gap:20px;align-items:flex-start;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.entry-row:hover{background:var(--paper-alt)}
.entry-no{font-family:var(--mono);font-size:13px;color:var(--text-3);letter-spacing:.06em;padding-top:4px}
.entry-thumb{display:block;overflow:hidden;border-radius:var(--r-card);border:1px solid var(--line)}
.entry-thumb img{width:120px;height:80px;object-fit:cover;filter:saturate(92%) contrast(1.04);transition:transform .45s var(--ease)}
.entry-row:hover .entry-thumb img{transform:scale(1.03)}
.entry-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.entry-title{font-family:var(--serif);font-size:18.5px;font-weight:600;color:var(--ink);border-bottom:1px solid transparent;transition:border-color .24s var(--ease)}
.entry-row:hover .entry-title{border-color:var(--gold)}
.entry-desc{color:var(--text-2);font-size:15px;line-height:1.8;margin:8px 0 0;max-width:62ch}
.entry-alt{margin-top:10px;font-size:12.5px;color:var(--text-3);font-family:var(--mono);letter-spacing:.02em;word-break:break-all}
.entry-arrow{color:var(--text-3);font-size:16px;padding-top:2px;transition:transform .24s var(--ease),color .24s var(--ease)}
.entry-row:hover .entry-arrow{transform:translateX(4px);color:var(--gold)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 11px;border-radius:999px;border:1px solid var(--gold);
  font-size:12px;letter-spacing:.04em;color:var(--warn);background:transparent;
}
.badge--soft{background:var(--gold-soft);border-color:transparent;color:var(--warn)}
.badge--muted{border-color:var(--line);color:var(--text-3)}

/* ============ 相关推荐横滚 ============ */
.track-wrap{position:relative}
.track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:20px;scrollbar-width:none;
}
.track::-webkit-scrollbar{display:none}
.track-card{
  flex:0 0 calc((100% - 48px)/3.2);scroll-snap-align:start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:0 0 20px;overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .28s var(--ease),box-shadow .28s var(--ease),border-color .28s var(--ease);
}
.track-card:hover{transform:translateY(-2px);border-color:var(--gold);box-shadow:var(--sh-2)}
.track-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0;filter:saturate(92%) contrast(1.04)}
.track-card .tc-body{padding:18px 20px 0}
.track-card h3{font-size:17px;margin:10px 0 8px}
.track-card p{font-size:14px;color:var(--text-2);line-height:1.75}
.track-nav{display:flex;gap:10px}
.track-progress{
  height:2px;background:var(--line);margin-top:8px;overflow:hidden;border-radius:2px;
}
.track-progress span{display:block;height:100%;width:34%;background:var(--gold);transition:transform .2s linear}

/* ============ 收藏分享 CTA ============ */
.share-band{background:var(--ink-deep);color:rgba(250,249,247,.72);position:relative;overflow:hidden}
.share-inner{
  display:grid;grid-template-columns:1fr 120px;gap:48px;align-items:center;
  padding:88px 24px;
}
.share-band h2{color:#FAF9F7;font-size:clamp(26px,3vw,34px);margin-bottom:16px}
.share-band p{max-width:60ch;color:rgba(250,249,247,.7)}
.share-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.qr-box{
  width:120px;height:120px;border:1px solid rgba(250,249,247,.28);border-radius:var(--r-card);
  display:flex;align-items:center;justify-content:center;position:relative;background:rgba(250,249,247,.04);
}
.qr-box i{position:absolute;width:3px;height:3px;border-radius:50%;background:var(--gold);opacity:.7}
.qr-box i:nth-child(1){top:34px;left:38px}
.qr-box i:nth-child(2){top:62px;left:70px}
.qr-box i:nth-child(3){top:44px;left:78px}
.qr-box span{font-size:12px;letter-spacing:.08em;color:rgba(250,249,247,.55);text-align:center;line-height:1.6}
.share-toast{
  margin-top:16px;font-size:13.5px;color:var(--ok);min-height:20px;
}

/* ============ FAQ ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:26px 0;font-family:var(--serif);font-size:20px;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .plus{
  flex:0 0 auto;width:18px;height:18px;position:relative;transition:transform .3s var(--ease);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--ink-mid);transition:background .24s var(--ease);
}
.faq-item summary .plus::before{top:8px;left:0;width:18px;height:1px}
.faq-item summary .plus::after{left:8px;top:0;width:1px;height:18px}
.faq-item[open] summary .plus{transform:rotate(45deg)}
.faq-item summary:hover{color:var(--gold)}
.faq-item summary:hover .plus::before,.faq-item summary:hover .plus::after{background:var(--gold)}
.faq-body{padding:0 0 28px;color:var(--text-2);font-size:16px;line-height:1.8;max-width:72ch}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink-deep);color:rgba(250,249,247,.7);position:relative;
  padding:78px 0 30px;font-size:14px;line-height:1.85;
}
.footer-stars{position:absolute;left:5%;top:44px;width:90px;height:50px;opacity:.55}
.footer-stars i{position:absolute;width:2.5px;height:2.5px;border-radius:50%;background:var(--gold)}
.footer-stars i:nth-child(1){top:0;left:0}
.footer-stars i:nth-child(2){top:18px;left:34px}
.footer-stars i:nth-child(3){top:36px;left:12px;width:2px;height:2px}
.footer-stars i:nth-child(4){top:8px;left:66px;width:2px;height:2px}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:44px;
}
.footer-grid > .footer-col + .footer-col{border-left:1px solid rgba(250,249,247,.1);padding-left:32px}
.footer-brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:19px;color:#FAF9F7;margin-bottom:16px}
.footer-col h4{font-family:var(--serif);font-size:15px;color:#FAF9F7;margin-bottom:18px;font-weight:600}
.footer-col p{color:rgba(250,249,247,.62);font-size:13.5px;max-width:38ch}
.footer-links li{margin-bottom:11px}
.footer-links a{color:rgba(250,249,247,.68);border-bottom:1px solid transparent;font-size:13.5px}
.footer-links a:hover{color:var(--gold);border-color:var(--gold)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  padding-top:24px;border-top:1px solid rgba(250,249,247,.12);
  font-size:12.5px;color:rgba(250,249,247,.5);
}

/* ============ 进场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:1439px){
  :root{--container:1140px}
}
@media (max-width:1199px){
  :root{--container:100%}
  .catalog{grid-template-columns:1fr;gap:0}
  .catalog-index{position:static;margin-bottom:40px}
  .index-list{display:flex;overflow-x:auto;gap:0;border-top:1px solid var(--line)}
  .index-list li{flex:0 0 auto}
  .index-list li a{border-bottom:0;border-right:1px solid var(--line);white-space:nowrap;padding:14px 18px}
  .track-card{flex:0 0 calc((100% - 24px)/2.2)}
}
@media (max-width:991px){
  body{font-size:16px}
  .section{padding:80px 0}
  .main-nav{display:none}
  .header-actions .icon-btn{display:none}
  .nav-burger{display:flex}
  .hero{min-height:560px}
  .hero-inner{padding:120px 0 60px}
  .hero-metrics{gap:36px}
  .entry-row{grid-template-columns:36px 108px 1fr 22px;gap:16px}
  .entry-thumb img{width:108px;height:72px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .footer-grid > .footer-col + .footer-col{border-left:0;padding-left:0}
  .share-inner{grid-template-columns:1fr;padding:72px 24px}
}
@media (max-width:767px){
  :root{--nav-h:60px}
  .container{padding:0 16px}
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px;margin-bottom:32px}
  .hero{min-height:520px}
  .hero-inner{padding:104px 0 48px}
  .hero-sub{font-size:16px;max-width:none}
  .hero-metrics{gap:28px;margin-top:36px}
  .hero-metrics .m-num{font-size:22px}
  .entry-row{grid-template-columns:1fr;gap:12px;padding:20px 0}
  .entry-no{padding-top:0}
  .entry-thumb img{width:100%;max-width:260px;height:auto;aspect-ratio:3/2}
  .entry-arrow{display:none}
  .entry-desc{font-size:14.5px}
  .track-card{flex:0 0 82%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .faq-item summary{font-size:18px;padding:20px 0}
  .share-inner{padding:60px 16px}
}
@media (max-width:560px){
  .hero{min-height:520px}
  .hero-cta .btn{width:100%;justify-content:center}
  .group-head{flex-wrap:wrap;gap:8px}
  .group-head .g-count{margin-left:0;width:100%}
  .brand-sub{font-size:10px;letter-spacing:.06em}
}
@media (max-width:419px){
  .hero h1{font-size:30px}
  .track-card{flex:0 0 88%}
  .badge{font-size:11.5px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category3 */
:root{
  --ink:#1E2A4A;
  --ink-deep:#0E1524;
  --ink-mid:#3D4A6B;
  --gold:#C8A55B;
  --gold-soft:#F0E6D2;
  --paper:#FAF9F7;
  --paper-alt:#F2F0EB;
  --card:#FFFFFF;
  --text:#1A1D23;
  --text-2:#5B6270;
  --text-3:#8B919C;
  --line:#E5E2DB;
  --ok:#3F7A5E;
  --warn:#B8862F;
  --err:#A8402F;
  --r-card:4px;
  --r-btn:2px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,21,36,.05);
  --sh-2:0 12px 28px -14px rgba(14,21,36,.20);
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,sans-serif;
  --serif:"Noto Serif SC","Source Han Serif SC","Songti SC",Georgia,"Times New Roman",serif;
  --mono:"Inter","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --nav-h:72px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:var(--ink);text-decoration:none;transition:color .24s var(--ease);}
a:hover{color:var(--gold);}
button{font-family:inherit;font-size:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font-family:inherit;font-size:inherit;color:inherit;}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.25;letter-spacing:-.01em;color:var(--ink);margin:0;}
p{margin:0 0 1.4em;}
p:last-child{margin-bottom:0;}
ul{margin:0;padding:0;list-style:none;}
::selection{background:var(--gold-soft);color:var(--ink-deep);}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:2px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.container-wide{max-width:1280px;}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;border-radius:var(--r-btn);
  font-size:15px;font-weight:500;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background-color .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .16s var(--ease),box-shadow .24s var(--ease);
}
.btn-primary{background:var(--ink);color:#fff;border-color:var(--ink);}
.btn-primary:hover{background:var(--ink-deep);border-color:var(--ink-deep);color:#fff;}
.btn-primary:hover .btn-arrow{transform:translateX(4px);}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--ink);}
.btn-ghost:hover{background:var(--gold-soft);color:var(--ink);border-color:var(--gold);}
.btn-ghost:hover .btn-arrow{transform:translateX(4px);}
.btn-light{background:#fff;color:var(--ink-deep);border-color:#fff;}
.btn-light:hover{background:var(--gold-soft);border-color:var(--gold-soft);color:var(--ink-deep);}
.btn-outline-light{background:transparent;color:#fff;border-color:rgba(250,249,247,.45);}
.btn-outline-light:hover{background:rgba(250,249,247,.10);border-color:var(--gold);color:#fff;}
.btn-arrow{display:inline-block;transition:transform .24s var(--ease);font-family:var(--mono);}
.btn:active{transform:translateY(1px);}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;
  font-size:15px;color:var(--ink);padding:4px 0;position:relative;
}
.btn-text::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .28s var(--ease);
}
.btn-text:hover::after{transform:scaleX(1);}

.icon-btn{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:var(--r-btn);color:var(--ink-mid);
  transition:border-color .24s var(--ease),color .24s var(--ease),background-color .24s var(--ease);
}
.icon-btn:hover{border-color:var(--gold);color:var(--ink);background:var(--gold-soft);}

.tag{
  display:inline-flex;align-items:center;
  padding:3px 12px;border-radius:var(--r-pill);
  font-size:12px;letter-spacing:.04em;line-height:1.7;
  border:1px solid var(--line);color:var(--text-2);background:var(--card);
}
.tag-gold{background:var(--gold-soft);border-color:var(--gold-soft);color:#8A6C28;}

.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;
  color:var(--gold);text-transform:uppercase;margin-bottom:18px;
}
.eyebrow::before{content:"";width:24px;height:1px;background:var(--gold);display:inline-block;}

.section{padding:104px 0;}
.section-alt{background:var(--paper-alt);}
.section-head{max-width:720px;margin-bottom:56px;}
.section-head h2{font-size:clamp(26px,3.2vw,36px);position:relative;padding-left:20px;}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.55em;width:12px;height:2px;background:var(--gold);
}
.section-head p{margin-top:16px;color:var(--text-2);font-size:16px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  height:var(--nav-h);
  display:flex;align-items:center;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background-color .3s var(--ease),border-color .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(250,249,247,.96);
  border-bottom-color:var(--line);
  box-shadow:var(--sh-1);
  backdrop-filter:saturate(140%) blur(8px);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;width:100%;}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);flex-shrink:0;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.02em;}
.brand-sub{font-size:11px;letter-spacing:.1em;color:var(--text-3);white-space:nowrap;}
.main-nav{display:flex;align-items:center;gap:34px;}
.nav-link{
  position:relative;font-size:15px;color:var(--ink-mid);padding:6px 0;
  transition:color .24s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);font-weight:500;}
.nav-link.is-active::after{transform:scaleX(1);}
.nav-link.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;width:5px;height:5px;
  border-radius:50%;background:var(--gold);transform:translateY(-50%);
}
.header-actions{display:flex;align-items:center;gap:14px;flex-shrink:0;}
.header-actions .btn{padding:10px 20px;font-size:14px;}
.nav-toggle{
  display:none;width:36px;height:36px;border:1px solid var(--line);border-radius:var(--r-btn);
  flex-direction:column;align-items:center;justify-content:center;gap:5px;
}
.nav-toggle span{display:block;width:16px;height:1px;background:var(--ink);transition:transform .3s var(--ease),opacity .3s var(--ease);}
.nav-toggle.is-open span:nth-child(1){transform:translateY(3px) rotate(45deg);}
.nav-toggle.is-open span:nth-child(2){transform:translateY(-3px) rotate(-45deg);}

.drawer{
  position:fixed;inset:0;z-index:88;background:var(--paper);
  padding:calc(var(--nav-h) + 24px) 24px 40px;
  overflow-y:auto;display:none;
}
.drawer.is-open{display:block;}
.drawer-list li{border-bottom:1px solid var(--line);}
.drawer-list a{
  display:block;padding:20px 0;font-family:var(--serif);font-size:22px;color:var(--ink);
}
.drawer-list a.is-active{color:var(--gold);}
.drawer-foot{margin-top:32px;font-size:14px;color:var(--text-3);}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  min-height:620px;display:flex;align-items:center;
  background-color:var(--ink-deep);
  margin-top:calc(-1 * var(--nav-h));
  padding:calc(var(--nav-h) + 72px) 0 96px;
}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("/assets/images/backpic/back-3.webp");
  background-size:cover;background-position:center;
  filter:saturate(.92) contrast(1.04);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(14,21,36,.78) 0%,rgba(14,21,36,.66) 45%,rgba(14,21,36,.72) 72%,rgba(250,249,247,.98) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:760px;}
.hero .eyebrow{color:var(--gold);}
.hero-title{
  font-size:clamp(34px,5vw,56px);color:#fff;letter-spacing:-.015em;margin-bottom:22px;
}
.hero-title em{font-style:normal;color:var(--gold);}
.hero-sub{
  font-size:17px;color:rgba(250,249,247,.82);max-width:560px;margin-bottom:36px;
}
.hero-cta{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:52px;}
.hero-meta{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:28px;padding-top:28px;border-top:1px solid rgba(250,249,247,.22);
}
.hero-meta .num{font-family:var(--mono);font-size:30px;color:#fff;letter-spacing:.02em;font-variant-numeric:tabular-nums;line-height:1.2;}
.hero-meta .lab{font-size:12.5px;letter-spacing:.08em;color:rgba(250,249,247,.62);margin-top:6px;}
.hero-stars{position:absolute;right:8%;bottom:18%;width:180px;height:120px;z-index:3;pointer-events:none;}
.hero-stars i{position:absolute;width:3px;height:3px;border-radius:50%;background:var(--gold);opacity:.5;animation:twinkle 6s ease-in-out infinite;}
.hero-stars i:nth-child(1){top:8%;left:14%;animation-delay:0s;}
.hero-stars i:nth-child(2){top:38%;left:62%;animation-delay:1.2s;}
.hero-stars i:nth-child(3){top:66%;left:26%;animation-delay:2.4s;}
.hero-stars i:nth-child(4){top:22%;left:86%;animation-delay:3.4s;}
.hero-stars i:nth-child(5){top:82%;left:70%;animation-delay:4.4s;}
@keyframes twinkle{0%,100%{opacity:.22;transform:scale(.8);}50%{opacity:.85;transform:scale(1.15);}}

/* ---------- 导语 ---------- */
.lede{padding:88px 0 40px;}
.lede-inner{max-width:800px;}
.lede h2{font-size:clamp(26px,3vw,34px);margin-bottom:22px;}
.lede p{color:var(--text-2);font-size:17px;}
.lede-rule{height:1px;background:var(--line);margin-top:48px;}

/* ---------- 图文交错合集 ---------- */
.feature-list{display:flex;flex-direction:column;gap:0;}
.feature-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:56px 0;border-top:1px solid var(--line);
}
.feature-row:first-child{border-top:0;padding-top:0;}
.feature-row:nth-child(even) .feature-media{order:2;}
.feature-media{
  border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  background:var(--paper-alt);box-shadow:var(--sh-1);
  transition:box-shadow .3s var(--ease),border-color .3s var(--ease);
}
.feature-media img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .45s var(--ease);filter:saturate(.92) contrast(1.04);}
.feature-row:hover .feature-media{border-color:var(--gold);box-shadow:var(--sh-2);}
.feature-row:hover .feature-media img{transform:scale(1.03);}
.feature-index{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.12em;color:var(--gold);
  display:block;margin-bottom:14px;
}
.feature-title{font-size:24px;margin-bottom:16px;}
.feature-text{color:var(--text-2);font-size:16px;margin-bottom:20px;}
.feature-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px;}
.feature-link{font-size:15px;color:var(--ink);display:inline-flex;align-items:center;gap:8px;border-bottom:1px solid var(--gold);padding-bottom:2px;}
.feature-link:hover{color:var(--gold);}

/* ---------- 速览索引 ---------- */
.index-list{border-top:1px solid var(--line);}
.index-row{
  display:grid;grid-template-columns:64px 1fr 28px;gap:20px;align-items:center;
  padding:22px 8px;border-bottom:1px solid var(--line);
  transition:background-color .24s var(--ease);
}
.index-row:hover{background:var(--paper-alt);}
.index-row .idx{font-family:var(--mono);font-size:13px;letter-spacing:.08em;color:var(--text-3);font-variant-numeric:tabular-nums;}
.index-row .idx-body strong{display:block;font-family:var(--serif);font-size:19px;font-weight:600;color:var(--ink);margin-bottom:4px;}
.index-row .idx-body span{font-size:14px;color:var(--text-2);}
.index-row .idx-arrow{font-family:var(--mono);color:var(--text-3);transition:transform .24s var(--ease),color .24s var(--ease);}
.index-row:hover .idx-arrow{transform:translateX(4px);color:var(--gold);}

/* ---------- 更新提醒表单 ---------- */
.notice-band{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:44px;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;
  box-shadow:var(--sh-1);
}
.notice-band h3{font-size:24px;margin-bottom:12px;}
.notice-band p{color:var(--text-2);font-size:15.5px;margin:0;}
.form-line{position:relative;padding-bottom:10px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:12px;transition:border-color .24s var(--ease);}
.form-line:focus-within{border-bottom-color:var(--ink);}
.form-line::after{
  content:"";position:absolute;left:0;bottom:-1px;height:2px;width:100%;
  background:var(--gold);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.form-line:focus-within::after{transform:scaleX(1);}
.form-line input{
  flex:1;border:0;background:transparent;padding:8px 0;font-size:15px;outline:none;
}
.form-line input::placeholder{color:var(--text-3);}
.form-line button{font-size:15px;color:var(--ink);display:inline-flex;align-items:center;gap:8px;white-space:nowrap;}
.form-line button:hover{color:var(--gold);}
.form-line.is-error{border-bottom-color:var(--err);}
.form-line.is-error::after{background:var(--err);transform:scaleX(1);}
.form-line.is-ok{border-bottom-color:var(--ok);}
.form-line.is-ok::after{background:var(--ok);transform:scaleX(1);}
.form-state{font-size:13.5px;margin-top:12px;color:var(--text-3);min-height:20px;}
.form-state.is-error{color:var(--err);}
.form-state.is-ok{color:var(--ok);}
.form-line.is-loading{opacity:.6;}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:24px 4px;font-family:var(--serif);font-size:20px;font-weight:600;color:var(--ink);
  transition:color .24s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--gold);}
.faq-item summary .plus{
  flex-shrink:0;width:20px;height:20px;position:relative;
  transition:transform .3s var(--ease);
}
.faq-item summary .plus::before,
.faq-item summary .plus::after{
  content:"";position:absolute;background:var(--gold);border-radius:1px;
}
.faq-item summary .plus::before{left:50%;top:0;width:1px;height:100%;transform:translateX(-50%);}
.faq-item summary .plus::after{top:50%;left:0;height:1px;width:100%;transform:translateY(-50%);}
.faq-item[open] summary .plus{transform:rotate(45deg);}
.faq-item .faq-body{padding:0 4px 26px;font-size:16px;color:var(--text-2);max-width:820px;}

/* ---------- 暗色 CTA ---------- */
.dark-band{
  position:relative;background:var(--ink-deep);color:rgba(250,249,247,.78);
  padding:88px 0;overflow:hidden;
}
.dark-band h2{color:#fff;font-size:clamp(26px,3vw,34px);margin-bottom:16px;}
.dark-band p{font-size:16px;max-width:620px;margin-bottom:32px;}
.dark-actions{display:flex;flex-wrap:wrap;gap:16px;align-items:center;margin-bottom:40px;}
.share-state{font-size:13.5px;color:var(--gold);min-height:20px;}
.qr-block{display:flex;align-items:center;gap:20px;padding-top:28px;border-top:1px solid rgba(250,249,247,.16);}
.qr-box{
  width:120px;height:120px;flex-shrink:0;border:1px solid rgba(250,249,247,.28);border-radius:var(--r-card);
  display:flex;align-items:center;justify-content:center;background:rgba(250,249,247,.06);
}
.qr-box span{font-family:var(--mono);font-size:12px;color:rgba(250,249,247,.5);letter-spacing:.08em;text-align:center;line-height:1.6;}
.qr-note{font-size:14px;color:rgba(250,249,247,.6);max-width:340px;}
.dark-band .stars{position:absolute;right:6%;top:18%;width:150px;height:110px;pointer-events:none;}
.dark-band .stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--gold);opacity:.4;}
.dark-band .stars i:nth-child(1){top:10%;left:20%;}
.dark-band .stars i:nth-child(2){top:46%;left:58%;}
.dark-band .stars i:nth-child(3){top:74%;left:30%;}
.dark-band .stars i:nth-child(4){top:26%;left:84%;}

/* ---------- 返回行 ---------- */
.return-row{
  display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;
  padding:40px 0 96px;
}
.return-links{display:flex;flex-wrap:wrap;gap:24px;font-size:15px;}
.return-links a{color:var(--ink-mid);border-bottom:1px solid transparent;padding-bottom:2px;transition:color .24s var(--ease),border-color .24s var(--ease);}
.return-links a:hover{color:var(--gold);border-bottom-color:var(--gold);}

/* ---------- 页脚 ---------- */
.site-footer{
  position:relative;background:var(--ink-deep);color:rgba(250,249,247,.7);
  padding:80px 0 32px;font-size:14px;overflow:hidden;
}
.footer-stars{position:absolute;right:8%;top:14%;width:140px;height:100px;pointer-events:none;}
.footer-stars i{position:absolute;width:2px;height:2px;border-radius:50%;background:var(--gold);opacity:.4;}
.footer-stars i:nth-child(1){top:10%;left:18%;}
.footer-stars i:nth-child(2){top:44%;left:56%;}
.footer-stars i:nth-child(3){top:72%;left:28%;}
.footer-stars i:nth-child(4){top:22%;left:82%;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:48px;
}
.footer-col h4{font-family:var(--serif);font-size:15px;color:#fff;margin-bottom:20px;font-weight:600;}
.footer-brand{display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:19px;color:#fff;margin-bottom:18px;}
.footer-brand .brand-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);}
.footer-col p{font-size:14px;line-height:1.8;margin-bottom:12px;color:rgba(250,249,247,.62);}
.footer-links li{margin-bottom:12px;}
.footer-links a{
  color:rgba(250,249,247,.7);position:relative;padding-bottom:2px;
  border-bottom:1px solid transparent;transition:color .24s var(--ease),border-color .24s var(--ease);
}
.footer-links a:hover{color:#fff;border-bottom-color:var(--gold);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
  padding-top:26px;border-top:1px solid rgba(250,249,247,.14);
  font-size:13.5px;color:rgba(250,249,247,.5);
}
.footer-bottom .mono{font-family:var(--mono);letter-spacing:.04em;}
.footer-grid > .footer-col + .footer-col{border-left:1px solid rgba(250,249,247,.10);padding-left:40px;}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .42s var(--ease),transform .42s var(--ease);}
.reveal.is-visible{opacity:1;transform:none;}
.reveal.d1{transition-delay:.06s;}
.reveal.d2{transition-delay:.12s;}
.reveal.d3{transition-delay:.18s;}

/* ---------- 响应式 ---------- */
@media (max-width:1439px){
  .container-wide{max-width:1200px;}
}
@media (max-width:1199px){
  .section{padding:88px 0;}
  .feature-row{gap:40px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-grid > .footer-col:nth-child(4){border-left:0;padding-left:0;}
}
@media (max-width:1024px){
  .main-nav{gap:22px;}
  .nav-link{font-size:14.5px;}
  .nav-link.is-active::before{left:-9px;width:4px;height:4px;}
  .header-actions .btn{padding:9px 16px;}
  .hero{min-height:580px;}
  .notice-band{grid-template-columns:1fr;gap:28px;padding:36px;}
}
@media (max-width:900px){
  .main-nav{display:none;}
  .nav-toggle{display:flex;}
  .header-actions .btn{display:none;}
  .feature-row{grid-template-columns:1fr;gap:28px;padding:44px 0;}
  .feature-row:nth-child(even) .feature-media{order:0;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-grid > .footer-col + .footer-col{border-left:0;padding-left:0;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .section{padding:64px 0;}
  .section-head{margin-bottom:36px;}
  .hero{min-height:520px;padding:calc(var(--nav-h) + 48px) 0 64px;}
  .hero-meta{grid-template-columns:1fr;gap:18px;}
  .hero-meta .num{font-size:26px;}
  .hero-stars{display:none;}
  .lede{padding:64px 0 24px;}
  .index-row{grid-template-columns:48px 1fr 20px;gap:14px;padding:18px 4px;}
  .index-row .idx-body strong{font-size:17px;}
  .faq-item summary{font-size:18px;padding:20px 2px;}
  .dark-band{padding:64px 0;}
  .qr-block{flex-direction:column;align-items:flex-start;gap:16px;}
  .return-row{padding:32px 0 64px;flex-direction:column;align-items:flex-start;}
  .site-footer{padding:64px 0 28px;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
}
@media (max-width:560px){
  .container{padding:0 16px;}
  .brand-sub{font-size:10px;letter-spacing:.06em;}
  .hero-cta{flex-direction:column;align-items:stretch;}
  .hero-cta .btn{justify-content:center;}
  .hero-title{font-size:clamp(30px,8vw,38px);}
  .feature-title{font-size:21px;}
  .dark-actions{flex-direction:column;align-items:stretch;}
  .dark-actions .btn{justify-content:center;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:420px){
  body{font-size:15.5px;}
  .brand-name{font-size:17px;}
  .section{padding:56px 0;}
  .btn{padding:12px 20px;font-size:14px;}
  .notice-band{padding:26px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .reveal{opacity:1;transform:none;}
}

/* roulang page: category4 */
:root{
  --ink:#1E2A4A;
  --ink-deep:#0E1524;
  --ink-mid:#3D4A6B;
  --gold:#C8A55B;
  --gold-soft:#F0E6D2;
  --bg:#FAF9F7;
  --bg-alt:#F2F0EB;
  --card:#FFFFFF;
  --text:#1A1D23;
  --text-2:#5B6270;
  --text-3:#8B919C;
  --line:#E5E2DB;
  --ok:#3F7A5E;
  --warn:#B8862F;
  --err:#A8402F;

  --radius-card:4px;
  --radius-btn:2px;
  --radius-pill:999px;

  --shadow-1:0 1px 2px rgba(14,21,36,.05);
  --shadow-2:0 12px 28px -14px rgba(14,21,36,.20);

  --container:1200px;
  --container-wide:1280px;
  --read:760px;

  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --serif:"Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --mono:"Inter",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;

  --ease:cubic-bezier(.22,1,.36,1);
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;}
a{color:var(--ink);text-decoration:none;transition:color .24s var(--ease);}
a:hover{color:var(--ink-deep);}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{margin:0;font-family:var(--serif);font-weight:600;line-height:1.25;letter-spacing:-.01em;color:var(--ink);}
p{margin:0 0 1.4em;}
p:last-child{margin-bottom:0;}
button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
input{font:inherit;}
:focus-visible{outline:2px solid var(--gold);outline-offset:2px;border-radius:2px;}
::selection{background:var(--gold-soft);color:var(--ink-deep);}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:.02em;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(250,249,247,.96);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
  backdrop-filter:saturate(140%) blur(6px);
}
.site-header.is-scrolled{background:#fff;box-shadow:var(--shadow-1);}
.header-inner{display:flex;align-items:center;gap:28px;height:72px;}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);flex:0 0 auto;display:inline-block;}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-family:var(--serif);font-size:19px;font-weight:700;color:var(--ink);letter-spacing:.01em;}
.brand-sub{font-size:11px;letter-spacing:.1em;color:var(--text-3);margin-top:2px;}

.main-nav{display:flex;align-items:center;gap:26px;margin-left:auto;}
.nav-link{
  position:relative;
  font-size:15px;
  color:var(--ink-mid);
  padding:6px 0;
  white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:0;background:var(--gold);
  transition:width .24s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--ink);font-weight:500;}
.nav-link.is-active::before{
  content:"";position:absolute;left:-12px;top:50%;transform:translateY(-50%);
  width:5px;height:5px;border-radius:50%;background:var(--gold);
}
.nav-link.is-active::after{width:100%;}

.header-actions{display:flex;align-items:center;gap:14px;margin-left:8px;}
.icon-btn{
  width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:2px;color:var(--ink-mid);background:transparent;
  transition:border-color .24s var(--ease),color .24s var(--ease),background .24s var(--ease);
}
.icon-btn:hover{border-color:var(--gold);color:var(--ink);background:#fff;}
.icon-btn svg{width:16px;height:16px;fill:none;stroke:currentColor;stroke-width:1.5;}

.menu-btn{display:none;width:40px;height:36px;flex-direction:column;justify-content:center;gap:6px;padding:0 8px;}
.menu-btn span{display:block;height:1px;background:var(--ink-mid);transition:transform .3s var(--ease),opacity .3s var(--ease);}
.menu-btn[aria-expanded="true"] span:first-child{transform:translateY(3.5px) rotate(45deg);}
.menu-btn[aria-expanded="true"] span:last-child{transform:translateY(-3.5px) rotate(-45deg);}

.search-panel{border-top:1px solid var(--line);background:#fff;}
.search-panel[hidden]{display:none;}
.search-form{display:flex;align-items:flex-end;gap:20px;padding:22px 0 26px;}
.field{flex:1 1 auto;position:relative;}
.field label{display:block;font-size:12.5px;letter-spacing:.08em;color:var(--text-3);margin-bottom:6px;}
.field input{
  width:100%;padding:10px 2px;border:0;border-bottom:1px solid var(--line);background:transparent;
  color:var(--text);font-size:16px;transition:border-color .24s var(--ease);
}
.field input::placeholder{color:var(--text-3);}
.field input:focus{outline:none;border-bottom-color:var(--ink);}
.field::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--gold);
  transition:width .3s var(--ease);
}
.field:focus-within::after{width:100%;}
.form-msg{font-size:14px;margin-top:10px;display:none;}
.form-msg.is-error{display:block;color:var(--err);}
.form-msg.is-ok{display:block;color:var(--ok);}

.mobile-drawer{
  position:fixed;inset:60px 0 0 0;background:var(--bg);z-index:70;
  transform:translateY(-8px);opacity:0;pointer-events:none;
  transition:opacity .28s var(--ease),transform .28s var(--ease);
  overflow-y:auto;
}
.mobile-drawer.is-open{opacity:1;transform:translateY(0);pointer-events:auto;}
.mobile-drawer .container{padding-top:18px;padding-bottom:40px;}
.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  font-family:var(--serif);font-size:22px;color:var(--ink);
  padding:20px 0;border-bottom:1px solid var(--line);
}
.drawer-link.is-active{color:var(--ink);}
.drawer-link.is-active::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--gold);margin-right:12px;}
.drawer-link span{display:flex;align-items:center;}
.drawer-link em{font-style:normal;color:var(--text-3);font-size:14px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;border-radius:var(--radius-btn);
  font-size:15px;font-weight:500;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background .24s var(--ease),color .24s var(--ease),border-color .24s var(--ease),transform .18s var(--ease);
}
.btn svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:1.6;transition:transform .24s var(--ease);}
.btn:hover svg{transform:translateX(4px);}
.btn:active{transform:translateY(1px);}
.btn-primary{background:var(--ink);color:#fff;}
.btn-primary:hover{background:var(--ink-deep);color:#fff;}
.btn-ghost{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-ghost:hover{background:var(--gold-soft);border-color:var(--ink);}
.btn-light{background:#fff;color:var(--ink-deep);}
.btn-light:hover{background:var(--gold-soft);color:var(--ink-deep);}
.btn-outline-light{border-color:rgba(255,255,255,.42);color:#fff;}
.btn-outline-light:hover{background:rgba(255,255,255,.1);color:#fff;border-color:#fff;}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn[disabled],.btn.is-disabled{opacity:.45;pointer-events:none;}
.btn-text{
  display:inline-flex;align-items:center;gap:8px;font-size:15px;color:var(--ink);padding:2px 0;
  border-bottom:1px solid transparent;
}
.btn-text:hover{color:var(--ink-deep);border-bottom-color:var(--gold);}

/* ---------- badges ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-pill);
  font-size:12px;letter-spacing:.04em;
  border:1px solid var(--line);color:var(--text-2);background:#fff;
}
.badge-gold{background:var(--gold-soft);border-color:var(--gold-soft);color:#8A6C24;}
.badge-ink{background:var(--ink);border-color:var(--ink);color:#fff;}

/* ---------- section base ---------- */
.section{padding:96px 0;}
.section-alt{background:var(--bg-alt);}
.section-head{max-width:760px;margin-bottom:44px;}
.section-head h2{font-size:clamp(26px,3vw,36px);}
.section-head h2::before{
  content:"";display:block;width:24px;height:2px;background:var(--gold);margin-bottom:18px;
}
.section-head p{margin-top:14px;color:var(--text-2);font-size:16.5px;}
.eyebrow{
  font-family:var(--mono);font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold);margin-bottom:14px;
}

/* ---------- hero ---------- */
.page-hero{
  padding:110px 0 84px;
  background:
    radial-gradient(880px 380px at 88% -10%, rgba(200,165,91,.10), transparent 68%),
    var(--bg);
  border-bottom:1px solid var(--line);
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--text-3);margin-bottom:30px;}
.breadcrumb a{color:var(--text-3);}
.breadcrumb a:hover{color:var(--ink);}
.breadcrumb .sep{color:var(--line);}
.page-hero h1{font-size:clamp(32px,4.4vw,52px);max-width:900px;font-weight:700;}
.page-hero .lede{
  max-width:720px;margin-top:22px;font-size:17.5px;color:var(--text-2);
}
.hero-facts{
  display:flex;flex-wrap:wrap;gap:48px;margin-top:44px;padding-top:26px;border-top:1px solid var(--line);
}
.fact-num{font-family:var(--mono);font-size:30px;font-weight:600;color:var(--ink);letter-spacing:.01em;line-height:1.1;}
.fact-label{font-size:13px;color:var(--text-3);letter-spacing:.06em;margin-top:6px;}

/* ---------- compare ---------- */
.compare{border-top:1px solid var(--line);}
.compare-head{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px;
  padding:14px 0;border-bottom:1px solid var(--line);
  font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;color:var(--text-3);
}
.compare-row{
  display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:32px;
  padding:26px 18px;border-bottom:1px solid var(--line);
  transition:background .24s var(--ease);
}
.compare-row:hover{background:var(--bg-alt);}
.compare-left{display:flex;align-items:flex-start;gap:14px;}
.compare-left .idx{
  font-family:var(--mono);font-size:13px;color:var(--gold);padding-top:4px;flex:0 0 auto;
}
.compare-left strong{font-weight:500;font-size:17px;color:var(--ink);}
.compare-right{color:var(--text-2);font-size:16px;}
.compare-right b{color:var(--ink);font-weight:500;}

/* ---------- steps + image ---------- */
.split{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:start;}
.step-list{border-top:1px solid var(--line);}
.step{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid var(--line);}
.step .no{font-family:var(--mono);font-size:22px;color:var(--gold);flex:0 0 auto;line-height:1.2;}
.step h3{font-size:19px;margin-bottom:6px;}
.step p{color:var(--text-2);font-size:15.5px;}
.figure{
  border:1px solid var(--line);border-radius:var(--radius-card);overflow:hidden;background:var(--card);
  box-shadow:var(--shadow-1);
}
.figure img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .45s var(--ease);}
.figure:hover img{transform:scale(1.03);}
.figcap{padding:14px 16px;font-size:13px;color:var(--text-3);border-top:1px solid var(--line);}
.note-card{
  margin-top:24px;padding:22px 24px;border:1px solid var(--line);border-left:2px solid var(--gold);
  background:var(--bg-alt);border-radius:var(--radius-card);
}
.note-card h4{font-size:16px;margin-bottom:10px;}
.note-card p{font-size:15px;color:var(--text-2);}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line);}
.faq details{border-bottom:1px solid var(--line);}
.faq summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:flex-start;justify-content:space-between;gap:24px;
  padding:26px 4px;font-family:var(--serif);font-size:20px;color:var(--ink);
  transition:color .24s var(--ease);
}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:hover{color:var(--ink-deep);}
.faq summary .mark{
  flex:0 0 auto;width:18px;height:18px;position:relative;margin-top:6px;
  transition:transform .3s var(--ease);
}
.faq summary .mark::before,
.faq summary .mark::after{
  content:"";position:absolute;background:var(--gold);
}
.faq summary .mark::before{left:0;right:0;top:8px;height:1.5px;}
.faq summary .mark::after{top:0;bottom:0;left:8px;width:1.5px;}
.faq details[open] summary .mark{transform:rotate(45deg);}
.faq .answer{padding:0 46px 28px 4px;color:var(--text-2);font-size:16px;max-width:900px;}
.faq .answer b{color:var(--ink);font-weight:500;}

/* ---------- related categories ---------- */
.related{display:flex;flex-wrap:wrap;gap:14px 34px;align-items:center;}
.related a{
  font-size:15px;color:var(--ink-mid);padding:4px 0;border-bottom:1px solid transparent;
  display:inline-flex;align-items:center;gap:8px;
}
.related a::after{content:"→";font-size:13px;color:var(--gold);transition:transform .24s var(--ease);}
.related a:hover{color:var(--ink);border-bottom-color:var(--gold);}
.related a:hover::after{transform:translateX(4px);}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background:var(--ink-deep);color:rgba(250,249,247,.78);
  padding:88px 0;
}
.cta-grid{display:grid;grid-template-columns:minmax(0,7fr) minmax(0,5fr);gap:56px;align-items:center;}
.cta-band h2{color:#fff;font-size:clamp(26px,3vw,36px);}
.cta-band .sub{color:rgba(250,249,247,.72);margin-top:16px;font-size:16.5px;max-width:560px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.cta-side{display:flex;align-items:center;gap:24px;justify-content:flex-end;}
.qr{
  width:120px;height:120px;flex:0 0 auto;border:1px solid rgba(250,249,247,.24);border-radius:var(--radius-card);
  display:flex;align-items:center;justify-content:center;background:rgba(250,249,247,.04);
}
.qr span{font-family:var(--mono);font-size:11px;letter-spacing:.1em;color:rgba(250,249,247,.5);text-align:center;line-height:1.6;}
.copy-state{font-size:14px;margin-top:16px;min-height:22px;color:var(--gold);}
.footer-stars,.hero-stars{position:absolute;pointer-events:none;}
.footer-stars i,.hero-stars i{position:absolute;display:block;width:3px;height:3px;border-radius:50%;background:rgba(250,249,247,.55);}
.footer-stars i:nth-child(1){top:38px;right:12%;}
.footer-stars i:nth-child(2){top:96px;right:24%;width:2px;height:2px;opacity:.6;}
.footer-stars i:nth-child(3){top:60px;right:38%;width:2px;height:2px;opacity:.45;}
.footer-stars i:nth-child(4){top:132px;right:8%;width:2px;height:2px;opacity:.5;}
@keyframes twinkle{0%,100%{opacity:.25;}50%{opacity:.9;}}
.footer-stars i{animation:twinkle 6s ease-in-out infinite;}

/* ---------- footer ---------- */
.site-footer{
  position:relative;background:var(--ink-deep);color:rgba(250,249,247,.7);
  padding:76px 0 26px;font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
  padding-bottom:44px;
}
.footer-col + .footer-col{border-left:1px solid rgba(250,249,247,.10);padding-left:32px;}
.footer-brand{
  display:flex;align-items:center;gap:10px;font-family:var(--serif);font-size:20px;color:#fff;
  margin-bottom:16px;
}
.footer-col p{color:rgba(250,249,247,.62);line-height:1.8;margin-bottom:12px;}
.footer-col h4{
  font-family:var(--sans);font-size:13px;font-weight:500;letter-spacing:.1em;
  color:rgba(250,249,247,.5);margin-bottom:16px;
}
.footer-links li{margin-bottom:10px;}
.footer-links a{
  color:rgba(250,249,247,.76);border-bottom:1px solid transparent;padding-bottom:2px;
  transition:color .24s var(--ease),border-color .24s var(--ease);
}
.footer-links a:hover{color:#fff;border-bottom-color:var(--gold);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px 24px;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(250,249,247,.10);padding-top:22px;
  font-size:13px;color:rgba(250,249,247,.48);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);}
.reveal.is-visible{opacity:1;transform:none;transition:opacity .42s var(--ease),transform .42s var(--ease);}

/* ---------- empty / error state ---------- */
.state-box{
  border:1px solid var(--line);border-radius:var(--radius-card);background:var(--card);
  padding:44px 28px;text-align:center;color:var(--text-2);
}
.state-box .star{
  width:8px;height:8px;border-radius:50%;background:var(--gold);display:inline-block;margin-bottom:14px;
}
.state-box a{color:var(--ink);border-bottom:1px solid var(--gold);}

/* ---------- breakpoints ---------- */
@media (max-width:1439px){
  .container{max-width:1140px;}
}
@media (max-width:1200px){
  .header-inner{gap:20px;}
  .main-nav{gap:18px;}
  .nav-link{font-size:14.5px;}
}
@media (max-width:992px){
  .main-nav{display:none;}
  .menu-btn{display:flex;}
  .section{padding:80px 0;}
  .page-hero{padding:90px 0 68px;}
  .split,.cta-grid{grid-template-columns:1fr;gap:40px;}
  .cta-side{justify-content:flex-start;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-col + .footer-col{border-left:0;padding-left:0;}
}
@media (max-width:768px){
  body{font-size:16px;}
  .header-inner{height:60px;}
  .brand-name{font-size:17px;}
  .brand-sub{font-size:10px;}
  .header-actions .btn-primary{display:none;}
  .mobile-drawer{inset:60px 0 0 0;}
  .section{padding:64px 0;}
  .page-hero{padding:72px 0 56px;}
  .page-hero h1{font-size:clamp(28px,7vw,38px);}
  .hero-facts{gap:28px;margin-top:32px;}
  .compare-head{display:none;}
  .compare-row{grid-template-columns:1fr;gap:10px;padding:22px 4px;}
  .compare-row:hover{background:transparent;}
  .faq summary{font-size:18px;padding:22px 0;}
  .faq .answer{padding:0 0 24px;font-size:15.5px;}
  .cta-band{padding:64px 0;}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px;}
  .footer-bottom{justify-content:flex-start;}
}
@media (max-width:560px){
  .container{padding:0 16px;}
  .search-form{flex-direction:column;align-items:stretch;gap:16px;}
  .hero-facts{gap:20px;}
  .fact-num{font-size:24px;}
  .btn{padding:12px 20px;width:100%;justify-content:center;}
  .cta-actions{gap:10px;}
  .related{gap:10px 20px;}
  .qr{width:100px;height:100px;}
}
@media (max-width:420px){
  .btn-text{font-size:14px;}
  .page-hero h1{font-size:26px;}
  .step{gap:16px;}
  .step .no{font-size:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}