/* roulang page: index */
:root{
  --ink:#0F1210;
  --ink-2:#171B18;
  --line-dark:rgba(255,255,255,.10);
  --brand:#C7F53F;
  --brand-hover:#B8E62F;
  --brand-ink:#0F1210;
  --mint:#4FD1A5;
  --sand:#F6F5F1;
  --paper:#FFFFFF;
  --line:#E3E2DC;
  --txt:#101310;
  --txt-2:#5C635E;
  --txt-3:#8B918C;
  --danger:#E5484D;
  --dark-txt:#F2F4F0;
  --dark-txt-2:#A9B2A8;
  --r-sm:6px;
  --r-md:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,19,16,.05);
  --sh-2:0 10px 28px rgba(16,19,16,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--txt);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--sand{background:var(--sand)}
.section--dark{background:var(--ink);color:var(--dark-txt)}
.section--dark .kicker{color:var(--dark-txt-2)}
.kicker{display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--txt-3);margin-bottom:16px}
.h2{
  font-size:clamp(26px,3.2vw,40px);
  font-weight:900;
  line-height:1.2;
  letter-spacing:-.02em;
  margin-bottom:20px;
}
.section-head{max-width:760px;margin-bottom:48px}
.section-head p{color:var(--txt-2);font-size:16px;line-height:1.8}
.section--dark .section-head p{color:var(--dark-txt-2)}
.muted{color:var(--txt-2)}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;background:transparent;color:var(--txt);
  cursor:pointer;white-space:nowrap;
  transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease),opacity .18s var(--ease);
}
.btn-lg{height:52px}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.btn-primary{background:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);opacity:.92}
.btn-ghost{border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-outline{border-color:var(--line);color:var(--txt)}
.btn-outline:hover{border-color:var(--ink);color:var(--ink)}
.btn .arrow{transition:transform .18s var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}
.btn[disabled],.btn:disabled{opacity:.4;cursor:not-allowed}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink);border-bottom:1px solid currentColor;padding-bottom:2px;transition:color .18s var(--ease)}
.link-arrow .arrow{transition:transform .18s var(--ease)}
.link-arrow:hover{color:var(--txt-2)}
.link-arrow:hover .arrow{transform:translateX(3px)}
.section--dark .link-arrow{color:var(--brand)}
.section--dark .link-arrow:hover{color:var(--dark-txt)}

/* 徽章 */
.badge{display:inline-flex;align-items:center;gap:6px;border-radius:var(--r-pill);padding:4px 10px;font-size:12px;font-weight:600;letter-spacing:.06em}
.badge-cat{background:rgba(79,209,165,.14);color:var(--ink)}
.badge-brand{background:var(--brand);color:var(--brand-ink)}
.badge-line{border:1px solid var(--line-dark);color:var(--dark-txt-2)}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  transition:background-color .24s var(--ease),backdrop-filter .24s var(--ease);
}
.site-header.is-scrolled{background:rgba(15,18,16,.92);backdrop-filter:blur(8px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;height:var(--nav-h)}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;letter-spacing:-.02em;font-size:16px}
.logo-mark{width:26px;height:26px;border-radius:var(--r-sm);background:var(--brand);position:relative;flex:none}
.logo-mark::after{content:"";position:absolute;left:50%;top:50%;width:3px;height:12px;background:var(--brand-ink);transform:translate(-50%,-50%)}
.logo-text{white-space:nowrap}
.main-nav{flex:1 1 auto;display:flex;justify-content:center}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu>li{position:relative}
.nav-menu>li>a{position:relative;display:inline-block;padding:8px 0;font-size:14px;font-weight:600;color:#DDE3DC;transition:color .18s var(--ease)}
.nav-menu>li>a::after{content:"";position:absolute;left:0;bottom:2px;width:100%;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform .18s var(--ease)}
.nav-menu>li>a:hover,.nav-menu>li>a:focus-visible{color:var(--brand)}
.nav-menu>li>a:hover::after,.nav-menu>li>a:focus-visible::after{transform:scaleX(1)}
.nav-menu>li>a.is-active{color:#fff}
.nav-menu>li>a.is-active::after{transform:scaleX(1)}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line-dark);border-radius:var(--r-sm);background:transparent;color:#fff;font-size:13px;font-weight:700;cursor:pointer}

/* Mega 面板 */
.mega{
  position:absolute;top:calc(100% + 14px);left:50%;transform:translate(-50%,-6px);
  width:640px;background:#141815;border:1px solid var(--line-dark);border-radius:var(--r-md);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  padding:24px;display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:24px;
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
}
.has-menu:hover .mega,.has-menu:focus-within .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}
.mega h4{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--dark-txt-2);margin-bottom:14px}
.mega-list li+li{margin-top:10px}
.mega-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14px;font-weight:600;color:#E4E9E2;transition:color .18s var(--ease)}
.mega-list a:hover{color:var(--brand)}
.mega-count{font-size:12px;font-weight:600;color:var(--dark-txt-2);border:1px solid var(--line-dark);border-radius:var(--r-pill);padding:1px 8px}
.mega-card{background:var(--ink-2);border:1px solid var(--line-dark);border-radius:var(--r-md);overflow:hidden;display:block;transition:border-color .18s var(--ease)}
.mega-card:hover{border-color:var(--brand)}
.mega-card img{aspect-ratio:16/9;width:100%;object-fit:cover}
.mega-card-body{padding:14px}
.mega-card-body strong{display:block;font-size:14px;font-weight:700;color:#F2F4F0;margin-bottom:4px}
.mega-card-body span{font-size:13px;color:var(--dark-txt-2)}

/* 移动抽屉 */
.mobile-nav{
  position:fixed;left:0;right:0;top:var(--nav-h);bottom:0;z-index:55;
  background:var(--ink);padding:20px 20px 40px;overflow-y:auto;
  opacity:0;visibility:hidden;transform:translateY(-8px);
  transition:opacity .2s var(--ease),transform .2s var(--ease),visibility .2s;
}
.mobile-nav.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mobile-nav a.m-link{display:block;font-size:18px;font-weight:700;color:#F2F4F0;line-height:56px;border-bottom:1px solid var(--line-dark)}
.mobile-nav .btn{width:100%;margin-top:24px}

/* Hero */
.hero{background:var(--ink);color:var(--dark-txt);padding:80px 0 64px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line-dark);border-radius:var(--r-pill);padding:5px 14px 5px 12px;font-size:12px;font-weight:600;letter-spacing:.06em;color:#DCE2DA;margin-bottom:24px}
.hero-badge i{width:6px;height:6px;border-radius:50%;background:var(--brand);display:block}
.hero h1{font-size:clamp(38px,6vw,68px);font-weight:900;line-height:1.06;letter-spacing:-.03em;margin-bottom:20px}
.hero-sub{font-size:17px;line-height:1.8;color:var(--dark-txt-2);max-width:520px;margin-bottom:32px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:28px}
.hero-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12px;color:var(--dark-txt-2)}
.hero-meta span.dot{opacity:.5}
.hero-visual{position:relative}
.hero-visual>img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:var(--r-md);background:#1B201C}
.hero-visual::after{content:"";position:absolute;inset:0;border-radius:var(--r-md);background:linear-gradient(180deg,rgba(15,18,16,0) 45%,rgba(15,18,16,.65) 100%);pointer-events:none}
.entry-card{
  position:absolute;right:-24px;bottom:-28px;width:min(310px,88%);z-index:2;
  background:var(--ink-2);border:1px solid var(--line-dark);border-radius:var(--r-md);
  padding:20px;box-shadow:0 24px 60px rgba(0,0,0,.45);
}
.entry-card p.entry-lead{font-size:14px;font-weight:700;color:#F2F4F0;margin-bottom:14px}
.field{
  width:100%;height:48px;border-radius:var(--r-sm);
  background:#111512;border:1px solid var(--line-dark);color:var(--dark-txt);
  padding:0 14px;font-size:15px;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.field::placeholder{color:#7C857C}
.field:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(199,245,63,.24)}
.field.is-error{border-color:var(--danger);box-shadow:0 0 0 2px rgba(229,72,77,.2)}
.entry-card .btn{width:100%;margin-top:12px}
.entry-hint{display:block;margin-top:12px;font-size:13px;color:var(--dark-txt-2);border-bottom:1px solid transparent}
.entry-hint:hover{color:var(--brand);border-bottom-color:var(--brand)}
.tag-strip{display:flex;gap:10px;margin-top:56px;padding-top:24px;border-top:1px solid var(--line-dark);overflow-x:auto;scrollbar-width:none}
.tag-strip::-webkit-scrollbar{display:none}
.tag{padding:5px 12px;border-radius:var(--r-pill);border:1px solid var(--line-dark);font-size:12px;font-weight:600;color:var(--dark-txt-2);white-space:nowrap}

/* 信任条 */
.trust-strip{background:var(--paper);border-bottom:1px solid var(--line);padding:24px 0}
.trust-list{display:flex;align-items:center;justify-content:space-between;gap:20px;overflow-x:auto;scrollbar-width:none}
.trust-list::-webkit-scrollbar{display:none}
.trust-list li{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--txt-2);white-space:nowrap}
.trust-list svg{flex:none}

/* 卖点三连 */
.value-grid{display:grid;grid-template-columns:4fr 8fr;gap:48px;align-items:start}
.value-aside{position:sticky;top:110px}
.value-aside p{color:var(--txt-2);font-size:16px;max-width:300px}
.value-item{
  display:grid;grid-template-columns:72px 1fr;gap:20px;padding:32px 0;
  border-top:1px solid var(--line);
  transition:transform .24s var(--ease);
}
.value-item:last-child{border-bottom:1px solid var(--line)}
.value-item:hover{transform:translateX(4px)}
.value-num{font-size:44px;font-weight:900;line-height:1;letter-spacing:-.03em;color:var(--ink)}
.value-num::after{content:"";display:block;width:3px;height:28px;background:var(--brand);margin-top:14px;transition:height .24s var(--ease)}
.value-item:hover .value-num::after{height:40px}
.value-item h3{font-size:19px;font-weight:700;line-height:1.4;margin-bottom:8px}
.value-item p{font-size:15px;color:var(--txt-2);line-height:1.8;max-width:560px}

/* 场景演示 */
.scene-row{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.scene-row+.scene-row{margin-top:80px}
.scene-media{overflow:hidden;border-radius:var(--r-md);background:var(--sand)}
.scene-media img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-md);transition:transform .24s var(--ease)}
.scene-media:hover img{transform:scale(1.03)}
.scene-row:nth-child(even) .scene-media{order:2}
.scene-text h3{font-size:22px;font-weight:700;line-height:1.4;margin-bottom:14px}
.scene-text>p{font-size:16px;color:var(--txt-2);line-height:1.85;margin-bottom:20px;max-width:460px}
.point-list li{position:relative;padding-left:20px;font-size:15px;color:var(--txt-2);line-height:1.8}
.point-list li+li{margin-top:8px}
.point-list li::before{content:"";position:absolute;left:0;top:10px;width:8px;height:8px;background:var(--brand)}
.scene-text .link-arrow{margin-top:22px}

/* 资讯列表 */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px;flex-wrap:wrap}
.news-lead{display:grid;grid-template-columns:5fr 7fr;gap:32px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);padding:24px;box-shadow:var(--sh-1);transition:box-shadow .24s var(--ease),transform .24s var(--ease)}
.news-lead:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.news-lead img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-md);background:var(--sand)}
.news-lead h3{font-size:22px;font-weight:700;line-height:1.45;margin:12px 0}
.news-lead h3 a:hover{color:var(--txt-2)}
.news-lead p{font-size:15px;color:var(--txt-2);line-height:1.8;margin-bottom:18px}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:24px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);padding:20px;box-shadow:var(--sh-1);transition:box-shadow .24s var(--ease),transform .24s var(--ease)}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-md);background:var(--sand);margin-bottom:16px}
.card h3{font-size:18px;font-weight:700;line-height:1.5;margin:10px 0 8px}
.card h3 a:hover{color:var(--txt-2)}
.card p{font-size:14px;color:var(--txt-2);line-height:1.75;margin-bottom:14px}
.card-meta,.news-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--txt-3)}
.news-meta{margin-top:4px;padding-top:16px;border-top:1px solid var(--line)}
.empty-state{
  max-width:560px;margin:0 auto;text-align:center;background:var(--paper);
  border:1px dashed var(--line);border-radius:var(--r-md);padding:48px 24px;
}
.empty-state svg{margin:0 auto 16px;display:block}
.empty-state p{font-size:15px;color:var(--txt-2);margin-bottom:14px}

/* 社会认同 */
.proof-grid{display:grid;grid-template-columns:5fr 7fr;gap:56px;align-items:start}
.stat-list{margin-top:32px}
.stat-item{padding:22px 0;border-top:1px solid var(--line-dark)}
.stat-item:last-child{border-bottom:1px solid var(--line-dark)}
.stat-num{font-size:40px;font-weight:900;line-height:1;color:var(--brand);letter-spacing:-.02em}
.stat-label{display:block;margin-top:8px;font-size:12px;color:var(--dark-txt-2)}
.quote-col{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.quote-col .quote:nth-child(2){transform:translateY(24px)}
.quote{background:var(--ink-2);border:1px solid var(--line-dark);border-radius:var(--r-md);padding:24px}
.quote .mark{font-size:30px;line-height:1;color:rgba(255,255,255,.16);display:block;margin-bottom:10px}
.quote p{font-size:15px;line-height:1.85;color:#E6EAE4;margin-bottom:18px}
.quote-foot{display:flex;align-items:center;gap:12px;padding-top:16px;border-top:1px solid var(--line-dark)}
.avatar{width:32px;height:32px;border-radius:50%;background:#2A322B;color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700;flex:none}
.quote-foot strong{display:block;font-size:14px;color:#F2F4F0;font-weight:700}
.quote-foot span{font-size:12px;color:var(--dark-txt-2)}

/* FAQ */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-list{margin-top:8px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:16px 0;background:transparent;border:0;text-align:left;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--txt);
}
.faq-q:hover{color:var(--txt-2)}
.faq-icon{position:relative;width:24px;height:24px;flex:none;transition:transform .24s var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;left:50%;top:50%;background:var(--ink);transform:translate(-50%,-50%)}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--brand-ink)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease)}
.faq-a p{font-size:15px;line-height:1.85;color:var(--txt-2);max-width:680px;padding-bottom:20px}
.faq-item.is-open .faq-a{max-height:340px}

/* 底部转化条 */
.sticky-cta{
  position:fixed;right:24px;bottom:24px;z-index:70;
  display:flex;align-items:center;gap:16px;height:64px;padding:0 12px 0 20px;
  background:var(--ink);border:1px solid var(--line-dark);border-radius:var(--r-pill);
  box-shadow:0 24px 60px rgba(0,0,0,.35);
}
.sticky-cta p{font-size:15px;font-weight:600;color:#F2F4F0}

/* 页脚 */
.site-footer{background:var(--ink);color:var(--dark-txt-2);padding:64px 0 48px;border-top:1px solid var(--line-dark)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand p{font-size:14px;line-height:1.8;max-width:280px;margin-bottom:20px}
.social-row{display:flex;gap:10px}
.social-row a{width:36px;height:36px;border-radius:50%;border:1px solid var(--line-dark);display:flex;align-items:center;justify-content:center;color:var(--dark-txt-2);transition:color .18s var(--ease),border-color .18s var(--ease)}
.social-row a:hover{color:var(--brand);border-color:var(--brand)}
.footer-col h4{font-size:13px;font-weight:700;color:#F2F4F0;letter-spacing:.06em;margin-bottom:16px}
.footer-col li+li{margin-top:10px}
.footer-col a,.footer-col span{font-size:14px;color:var(--txt-3);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:48px;padding-top:24px;border-top:1px solid var(--line-dark);font-size:13px;color:var(--txt-3)}
.footer-bottom a{color:var(--txt-3)}
.footer-bottom a:hover{color:var(--brand)}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}

/* 进场动效 */
.js .reveal{opacity:0;transform:translateY(12px);transition:opacity .24s var(--ease),transform .24s var(--ease)}
.js .reveal.is-in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .js .reveal{opacity:1;transform:none}
  .card:hover,.news-lead:hover,.value-item:hover{transform:none}
}

/* 断点 */
@media (max-width:1280px){
  .container{padding:0 32px}
  .mega{width:600px}
}
@media (max-width:1024px){
  .container{padding:0 24px}
  .main-nav,.nav-actions{display:none}
  .nav-toggle{display:block}
  .hero{padding:64px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:48px}
  .hero-visual{max-width:520px}
  .entry-card{right:0;bottom:-20px}
  .value-grid{grid-template-columns:1fr;gap:32px}
  .value-aside{position:static}
  .news-lead{grid-template-columns:1fr;gap:20px}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .proof-grid{grid-template-columns:1fr;gap:40px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .scene-row{grid-template-columns:1fr;gap:28px}
  .scene-row:nth-child(even) .scene-media{order:0}
  .scene-row+.scene-row{margin-top:56px}
  .section{padding:72px 0}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .hero h1{font-size:clamp(32px,8vw,44px)}
  .news-grid{grid-template-columns:1fr}
  .quote-col{grid-template-columns:1fr}
  .quote-col .quote:nth-child(2){transform:none}
  .stat-list{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
  .stat-item{border-top:1px solid var(--line-dark);padding:16px 0}
  .stat-item:last-child{border-bottom:1px solid var(--line-dark)}
  .stat-num{font-size:30px}
  .sticky-cta{
    left:0;right:0;bottom:0;height:64px;border-radius:0;border-left:0;border-right:0;border-bottom:0;
    justify-content:space-between;padding:0 16px calc(env(safe-area-inset-bottom,0px));
    height:calc(64px + env(safe-area-inset-bottom,0px));
  }
  .site-footer{padding-bottom:96px}
}
@media (max-width:520px){
  .hero{padding:48px 0 48px}
  .hero-cta{flex-direction:column;align-items:stretch}
  .hero-cta .btn{width:100%}
  .value-num{font-size:34px}
  .value-item{grid-template-columns:1fr;gap:10px}
  .footer-grid{grid-template-columns:1fr}
  .stat-list{grid-template-columns:1fr}
  .sticky-cta p{font-size:14px}
}

/* roulang page: category1 */
:root{
  --ink:#0F1210;
  --ink-2:#171B18;
  --line-dark:rgba(255,255,255,.10);
  --brand:#C7F53F;
  --brand-hover:#B8E62F;
  --brand-ink:#0F1210;
  --mint:#4FD1A5;
  --sand:#F6F5F1;
  --paper:#FFFFFF;
  --line:#E3E2DC;
  --txt:#101310;
  --txt-2:#5C635E;
  --txt-3:#8B918C;
  --danger:#E5484D;
  --r-sm:6px;
  --r-md:10px;
  --r-pill:999px;
  --sh:0 1px 2px rgba(16,19,16,.05);
  --sh-hover:0 10px 28px rgba(16,19,16,.10);
  --t:180ms cubic-bezier(.22,.61,.36,1);
  --t-move:240ms cubic-bezier(.22,.61,.36,1);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--txt);
  background:var(--paper);
  font-feature-settings:"tnum";
}
img{max-width:100%;display:block;border-radius:var(--r-md);}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{max-width:var(--container);margin:0 auto;padding:0 24px;}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- 通用组件 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;cursor:pointer;
  transition:background var(--t),color var(--t),border-color var(--t),transform var(--t),box-shadow var(--t);
}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-lg{height:52px;padding:0 28px;font-size:16px;}
.btn-primary{background:var(--brand);color:var(--brand-ink);}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(0);filter:brightness(.96);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--txt);}
.btn-ghost:hover{border-color:var(--brand);color:var(--txt);}
.btn-ghost-dark{background:transparent;border-color:var(--line-dark);color:#F2F4F0;}
.btn-ghost-dark:hover{border-color:var(--brand);color:var(--brand);}
.btn[disabled],.btn.is-disabled{opacity:.4;cursor:not-allowed;transform:none;}
.btn .arrow{transition:transform var(--t-move);}
.btn:hover .arrow{transform:translateX(3px);}

.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--txt);border-bottom:1px solid var(--line);padding-bottom:2px;
  transition:border-color var(--t),color var(--t);
}
.text-link:hover{border-color:var(--brand);}
.text-link .arrow{transition:transform var(--t-move);}
.text-link:hover .arrow{transform:translateX(3px);}
.dark-link{color:#F2F4F0;border-color:var(--line-dark);}
.dark-link:hover{border-color:var(--brand);color:var(--brand);}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  border-radius:var(--r-pill);font-size:12px;font-weight:600;letter-spacing:.06em;
  padding:4px 10px;background:rgba(79,209,165,.12);color:var(--ink);
}
.badge-brand{background:var(--brand);color:var(--brand-ink);}
.badge-line{border:1px solid var(--line-dark);color:#A9B2A8;background:transparent;}

.kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:600;letter-spacing:.12em;
  color:var(--txt-3);text-transform:uppercase;
}
.kicker::before{content:"";width:14px;height:3px;background:var(--brand);border-radius:2px;}
.kicker-dark{color:#A9B2A8;}

.section{padding:96px 0;}
.section-sand{background:var(--sand);}
.section-dark{background:var(--ink);color:#F2F4F0;}
.section-title{font-size:clamp(26px,3.2vw,40px);font-weight:900;line-height:1.2;letter-spacing:-.02em;}
.section-sub{margin-top:16px;font-size:16px;color:var(--txt-2);max-width:640px;}
.section-head{margin-bottom:48px;}
.section-head h2{margin-top:16px;}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  transition:background var(--t),backdrop-filter var(--t);
}
.site-header.is-scrolled{background:rgba(15,18,16,.92);backdrop-filter:blur(8px);}
.header-inner{display:flex;align-items:center;gap:28px;height:72px;}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto;}
.logo-mark{
  width:22px;height:22px;border-radius:5px;background:var(--brand);
  position:relative;flex:0 0 auto;
}
.logo-mark::after{
  content:"";position:absolute;left:7px;top:5px;width:7px;height:12px;
  border:2px solid var(--ink);border-left:0;border-bottom:0;transform:rotate(45deg) scale(.8);
}
.logo-text{color:#F2F4F0;font-weight:800;font-size:16px;letter-spacing:-.02em;}
.main-nav{flex:1 1 auto;}
.nav-menu{display:flex;align-items:center;gap:28px;}
.nav-menu > li{position:relative;}
.nav-menu > li > a{
  position:relative;display:inline-flex;align-items:center;
  font-size:14px;font-weight:600;color:#E7ECE4;padding:24px 0;
  transition:color var(--t);
}
.nav-menu > li > a::after{
  content:"";position:absolute;left:0;bottom:16px;height:2px;width:0;background:var(--brand);
  transition:width var(--t-move);
}
.nav-menu > li > a:hover{color:var(--brand);}
.nav-menu > li > a:hover::after{width:100%;}
.nav-menu > li > a.is-active{color:var(--brand);}
.nav-menu > li > a.is-active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto;}

/* Mega 面板 */
.has-menu .mega{
  position:absolute;top:calc(100% - 8px);right:-12px;width:720px;
  display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:24px;
  background:#141815;border:1px solid var(--line-dark);border-radius:var(--r-md);
  padding:24px;box-shadow:0 24px 60px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;transform:translateY(-6px);
  transition:opacity 160ms ease,transform 160ms ease,visibility 160ms;
}
.has-menu:hover .mega,.has-menu:focus-within .mega{opacity:1;visibility:visible;transform:translateY(0);}
.mega h4{font-size:12px;font-weight:600;letter-spacing:.12em;color:#8B918C;margin-bottom:12px;}
.mega-list li + li{margin-top:8px;}
.mega-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  font-size:14px;color:#E7ECE4;padding:6px 0;transition:color var(--t);
}
.mega-list a:hover{color:var(--brand);}
.mega-count{font-size:12px;color:#8B918C;}
.mega-card{
  display:flex;gap:12px;align-items:center;padding:10px;border-radius:var(--r-md);
  border:1px solid var(--line-dark);transition:border-color var(--t),transform var(--t-move);
}
.mega-card:hover{border-color:var(--brand);transform:translateY(-2px);}
.mega-card img{width:72px;height:41px;object-fit:cover;border-radius:var(--r-sm);}
.mega-card-body{display:flex;flex-direction:column;gap:2px;}
.mega-card-body strong{font-size:14px;color:#F2F4F0;}
.mega-card-body span{font-size:12.5px;color:#A9B2A8;}

.nav-toggle{
  display:none;width:40px;height:40px;border:1px solid var(--line-dark);
  border-radius:var(--r-sm);background:transparent;cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:#F2F4F0;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#F2F4F0;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}

/* ---------- 内页页头 ---------- */
.page-hero{
  position:relative;background:var(--ink);color:#F2F4F0;overflow:hidden;
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;background-position:center;
  opacity:.55;
}
.page-hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(15,18,16,.92) 0%,rgba(15,18,16,.72) 55%,rgba(15,18,16,.86) 100%);
}
.page-hero .container{position:relative;z-index:2;padding-top:88px;padding-bottom:72px;}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:#A9B2A8;margin-bottom:24px;
}
.breadcrumb a{color:#A9B2A8;transition:color var(--t);}
.breadcrumb a:hover{color:var(--brand);}
.breadcrumb .sep{color:#5C635E;}
.page-hero h1{
  font-size:clamp(30px,4.2vw,48px);font-weight:900;line-height:1.15;letter-spacing:-.02em;
  max-width:900px;margin-top:16px;
}
.page-hero .lead{margin-top:20px;font-size:16px;line-height:1.85;color:#C9D0C6;max-width:700px;}
.anchor-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px;}
.pill{
  display:inline-flex;align-items:center;height:34px;padding:0 16px;
  border:1px solid var(--line-dark);border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:#E7ECE4;background:transparent;
  transition:background var(--t),color var(--t),border-color var(--t);
}
.pill:hover{background:var(--brand);color:var(--brand-ink);border-color:var(--brand);}

/* ---------- 主体两栏 ---------- */
.layout{display:grid;grid-template-columns:8fr 4fr;gap:48px;align-items:start;}
.prose-block + .prose-block{margin-top:48px;}
.prose-block h2{
  font-size:clamp(22px,2.4vw,28px);font-weight:900;line-height:1.3;letter-spacing:-.01em;
  padding-left:14px;position:relative;margin-bottom:20px;
}
.prose-block h2::before{
  content:"";position:absolute;left:0;top:6px;width:3px;height:22px;background:var(--brand);border-radius:2px;
}
.prose-block p{font-size:16.5px;line-height:1.9;color:var(--txt-2);}
.prose-block p + p{margin-top:18px;}
.cover-figure{margin:32px 0 0;}
.cover-figure img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform var(--t-move);}
.cover-figure a{display:block;overflow:hidden;border-radius:var(--r-md);}
.cover-figure a:hover img{transform:scale(1.03);}
.cover-figure figcaption{margin-top:12px;font-size:13px;color:var(--txt-3);}

.num-list{margin-top:28px;}
.num-list li{
  display:flex;gap:20px;padding:26px 0;border-top:1px solid var(--line);
  transition:transform var(--t-move);
}
.num-list li:last-child{border-bottom:1px solid var(--line);}
.num-list li:hover{transform:translateX(4px);}
.num{
  font-size:34px;font-weight:900;line-height:1;letter-spacing:-.02em;
  color:var(--ink);font-variant-numeric:tabular-nums;flex:0 0 auto;min-width:52px;
}
.num-list h3{font-size:18px;font-weight:700;line-height:1.4;margin-bottom:8px;}
.num-list p{font-size:15px;line-height:1.8;color:var(--txt-2);max-width:560px;}

/* 侧栏 */
.side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  background:var(--sand);border-radius:var(--r-md);padding:24px;border:1px solid var(--line);
}
.side-card h3{font-size:16px;font-weight:800;margin-bottom:16px;}
.side-card ul li + li{margin-top:10px;}
.side-card ul a{
  display:flex;align-items:center;gap:8px;font-size:14px;color:var(--txt-2);
  transition:color var(--t);
}
.side-card ul a::before{content:"";width:8px;height:2px;background:var(--mint);border-radius:2px;flex:0 0 auto;}
.side-card ul a:hover{color:var(--ink);}
.entry-card{
  background:var(--ink-2);border:1px solid var(--line-dark);
  border-radius:var(--r-md);padding:24px;color:#F2F4F0;
}
.entry-card h3{font-size:18px;font-weight:800;margin-bottom:10px;}
.entry-card p{font-size:14px;line-height:1.8;color:#A9B2A8;margin-bottom:20px;}
.entry-card .btn{width:100%;}
.entry-card .meta{margin-top:14px;font-size:13px;color:#8B918C;}
.field{margin-bottom:14px;}
.field label{display:block;font-size:13px;font-weight:600;color:#A9B2A8;margin-bottom:8px;}
.field input{
  width:100%;height:48px;border-radius:var(--r-sm);
  background:#111512;border:1px solid var(--line-dark);color:#F2F4F0;
  padding:0 14px;font-size:15px;font-family:inherit;
  transition:border-color var(--t),box-shadow var(--t);
}
.field input::placeholder{color:#5C635E;}
.field input:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(199,245,63,.35);
}
.field .hint{margin-top:8px;font-size:13px;color:#8B918C;}
.field.is-error input{border-color:var(--danger);}
.field.is-error .hint{color:var(--danger);}

/* 相关阅读卡 */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px;}
.card{
  display:flex;flex-direction:column;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--sh);
  transition:transform var(--t-move),box-shadow var(--t-move),border-color var(--t);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-hover);border-color:#CFCFC7;}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;margin-bottom:16px;}
.card h3{font-size:17px;font-weight:700;line-height:1.45;margin-bottom:10px;}
.card p{font-size:14px;line-height:1.75;color:var(--txt-2);margin-bottom:16px;}
.card .date{font-size:13px;color:var(--txt-3);font-variant-numeric:tabular-nums;margin-top:auto;}
.card .card-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;}

/* FAQ */
.faq-wrap{max-width:800px;margin:0 auto;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:20px;
  min-height:64px;padding:16px 0;background:transparent;border:0;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--txt);text-align:left;
  transition:color var(--t);
}
.faq-q:hover{color:#2C322D;}
.faq-icon{
  position:relative;flex:0 0 auto;width:20px;height:20px;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink);border-radius:2px;
  transition:transform var(--t-move),background var(--t);
}
.faq-icon::before{left:0;top:9px;width:20px;height:2px;}
.faq-icon::after{left:9px;top:0;width:2px;height:20px;}
.faq-q[aria-expanded="true"] .faq-icon::before{background:var(--brand);}
.faq-q[aria-expanded="true"] .faq-icon::after{transform:rotate(90deg);opacity:0;}
.faq-a{max-height:0;overflow:hidden;transition:max-height var(--t-move);}
.faq-q[aria-expanded="true"] + .faq-a{max-height:420px;}
.faq-a p{font-size:15px;line-height:1.85;color:var(--txt-2);max-width:680px;padding-bottom:24px;}

/* CTA 带 */
.cta-band{
  background:var(--sand);border:1px solid var(--line);border-radius:var(--r-md);
  padding:32px;display:flex;align-items:center;justify-content:space-between;gap:24px;
  margin-top:56px;
}
.cta-band h3{font-size:20px;font-weight:800;margin-bottom:6px;}
.cta-band p{font-size:15px;color:var(--txt-2);}
.cta-dark{background:var(--ink-2);border-color:var(--line-dark);color:#F2F4F0;}
.cta-dark p{color:#A9B2A8;}

/* Footer */
.site-footer{background:var(--ink);color:#F2F4F0;padding:64px 0 32px;border-top:1px solid var(--line-dark);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;}
.footer-brand .logo{margin-bottom:18px;}
.footer-brand p{font-size:14px;line-height:1.8;color:#A9B2A8;max-width:320px;}
.footer-col h4{font-size:13px;font-weight:700;letter-spacing:.08em;color:#8B918C;margin-bottom:16px;}
.footer-col ul li + li{margin-top:10px;}
.footer-col ul a,.footer-col ul span{font-size:14px;color:#A9B2A8;transition:color var(--t);}
.footer-col ul a:hover{color:var(--brand);}
.social-row{display:flex;gap:10px;margin-top:20px;}
.social-row a{
  width:34px;height:34px;border-radius:var(--r-pill);border:1px solid var(--line-dark);
  display:inline-flex;align-items:center;justify-content:center;color:#A9B2A8;
  transition:color var(--t),border-color var(--t);
}
.social-row a:hover{color:var(--brand);border-color:var(--brand);}
.footer-bottom{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line-dark);
  display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8B918C;
}
.footer-links{display:flex;gap:20px;}
.footer-links a{color:#8B918C;transition:color var(--t);}
.footer-links a:hover{color:var(--brand);}

/* 进场动效 */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms cubic-bezier(.22,.61,.36,1),transform 420ms cubic-bezier(.22,.61,.36,1);}
.reveal.is-in{opacity:1;transform:none;}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{padding:0 32px;}
}
@media (max-width:1024px){
  .layout{grid-template-columns:1fr;gap:40px;}
  .side{position:static;}
  .card-grid{grid-template-columns:repeat(2,1fr);}
  .nav-toggle{display:inline-flex;}
  .header-actions .btn-ghost{display:none;}
  .main-nav{
    position:fixed;left:0;right:0;top:60px;bottom:0;
    background:var(--ink);border-top:1px solid var(--line-dark);
    padding:12px 24px 48px;overflow-y:auto;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity var(--t),transform var(--t),visibility var(--t);
    z-index:70;
  }
  body.nav-open .main-nav{opacity:1;visibility:visible;transform:none;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu > li > a{font-size:18px;line-height:56px;padding:0;border-bottom:1px solid var(--line-dark);width:100%;}
  .nav-menu > li > a::after{display:none;}
  .has-menu .mega{
    position:static;width:auto;opacity:1;visibility:visible;transform:none;
    box-shadow:none;border:0;border-bottom:1px solid var(--line-dark);
    grid-template-columns:1fr;padding:12px 0;border-radius:0;background:transparent;
  }
  .header-inner{height:60px;}
  .section{padding:72px 0;}
  .page-hero .container{padding-top:64px;padding-bottom:56px;}
}
@media (max-width:768px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
  .footer-brand{grid-column:1 / -1;}
  .card-grid{grid-template-columns:1fr;}
  .cta-band{flex-direction:column;align-items:flex-start;}
  .cta-band .btn{width:100%;}
  .num{font-size:28px;min-width:42px;}
  .num-list li{gap:14px;padding:22px 0;}
  .faq-q{font-size:16px;}
  .page-hero .lead{font-size:15px;}
}
@media (max-width:520px){
  .header-actions .btn-primary{display:none;}
  .footer-grid{grid-template-columns:1fr;}
  .anchor-pills{gap:8px;}
  .pill{height:32px;padding:0 12px;font-size:12.5px;}
  .side-card,.entry-card{padding:20px;}
  .cta-band{padding:24px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition-property:opacity !important;transition-duration:120ms !important;}
  html{scroll-behavior:auto;}
  .reveal{transform:none !important;}
  .card:hover,.num-list li:hover,.btn:hover{transform:none !important;}
  .cover-figure a:hover img,.mega-card:hover{transform:none !important;}
}

/* roulang page: article */
:root{
  --ink:#0F1210;
  --ink-2:#171B18;
  --line-dark:rgba(255,255,255,.10);
  --brand:#C7F53F;
  --brand-hover:#B8E62F;
  --brand-ink:#0F1210;
  --mint:#4FD1A5;
  --sand:#F6F5F1;
  --paper:#FFFFFF;
  --line:#E3E2DC;
  --txt:#101310;
  --txt-2:#5C635E;
  --txt-3:#8B918C;
  --danger:#E5484D;
  --txt-dark-1:#F2F4F0;
  --txt-dark-2:#A9B2A8;
  --container:1200px;
  --r-sm:6px;
  --r-md:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,19,16,.05);
  --sh-2:0 10px 28px rgba(16,19,16,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--txt);
  background:var(--paper);
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media (min-width:1280px){.container{padding:0 32px;}}
@media (max-width:768px){.container{padding:0 20px;}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  transition:background .18s var(--ease),backdrop-filter .18s var(--ease);
}
.site-header.is-scrolled{background:rgba(15,18,16,.92);backdrop-filter:blur(8px);}
.header-inner{display:flex;align-items:center;gap:28px;height:var(--header-h);}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{width:14px;height:14px;border-radius:3px;background:var(--brand);display:inline-block;}
.logo-text{color:var(--txt-dark-1);font-weight:800;font-size:17px;letter-spacing:-.02em;white-space:nowrap;}
.main-nav{margin-left:auto;}
.nav-menu{display:flex;align-items:center;gap:28px;}
.nav-menu > li{position:relative;}
.nav-menu > li > a{
  display:inline-block;padding:6px 0;font-size:14px;font-weight:600;color:var(--txt-dark-2);
  position:relative;transition:color .18s var(--ease);
}
.nav-menu > li > a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--brand);
  transition:width .18s var(--ease);
}
.nav-menu > li > a:hover,.nav-menu > li > a:focus-visible,
.nav-menu > li > a.is-active{color:var(--brand);}
.nav-menu > li > a:hover::after,.nav-menu > li > a.is-active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px;}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border:1px solid var(--line-dark);border-radius:var(--r-sm);
  background:transparent;cursor:pointer;color:var(--txt-dark-1);
}
.nav-toggle span{display:block;width:16px;height:1.5px;background:currentColor;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:16px;height:1.5px;background:currentColor;
}
.nav-toggle span::before{top:-5px;}
.nav-toggle span::after{top:5px;}

/* mega */
.mega{
  position:absolute;top:calc(100% + 18px);left:50%;transform:translate(-50%,-6px);
  width:720px;padding:24px;display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:24px;
  background:#141815;border:1px solid var(--line-dark);border-radius:var(--r-md);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
}
.has-menu:hover .mega,.has-menu:focus-within .mega{opacity:1;visibility:visible;transform:translate(-50%,0);}
.mega h4{font-size:12px;letter-spacing:.12em;color:var(--txt-dark-2);font-weight:600;margin-bottom:12px;}
.mega-list li + li{margin-top:8px;}
.mega-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:14px;color:var(--txt-dark-1);padding:4px 0;transition:color .18s var(--ease);
}
.mega-list a:hover{color:var(--brand);}
.mega-count{
  font-size:11px;font-weight:600;color:var(--brand);background:rgba(199,245,63,.12);
  border-radius:var(--r-pill);padding:2px 8px;
}
.mega-card{
  display:block;border:1px solid var(--line-dark);border-radius:var(--r-md);overflow:hidden;
  background:var(--ink-2);transition:border-color .18s var(--ease),transform .18s var(--ease);
}
.mega-card:hover{border-color:rgba(199,245,63,.5);transform:translateY(-2px);}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover;}
.mega-card-body{display:block;padding:14px 16px;}
.mega-card-body strong{display:block;font-size:14px;font-weight:700;color:var(--txt-dark-1);}
.mega-card-body span{display:block;margin-top:4px;font-size:12px;color:var(--txt-dark-2);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);border:1px solid transparent;
  font-size:15px;font-weight:700;cursor:pointer;white-space:nowrap;
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.btn-primary{background:var(--brand);color:var(--brand-ink);}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px);}
.btn-primary:active{transform:none;filter:brightness(.95);}
.btn-ghost{background:transparent;border-color:var(--line-dark);color:var(--txt-dark-1);}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand);}
.btn-sm{height:40px;padding:0 18px;font-size:14px;}
.btn-lg{height:52px;}
.btn-light{background:transparent;border-color:var(--line);color:var(--txt);}
.btn-light:hover{border-color:var(--ink);color:var(--ink);}
.text-link{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--txt);border-bottom:1px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.text-link svg{transition:transform .18s var(--ease);}
.text-link:hover{border-color:var(--brand);}
.text-link:hover svg{transform:translateX(3px);}

/* ---------- badges & tags ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  font-size:12px;font-weight:600;letter-spacing:.06em;
  padding:4px 10px;border-radius:var(--r-pill);
}
.badge-cat{background:rgba(79,209,165,.12);color:var(--ink);}
.badge-brand{background:var(--brand);color:var(--brand-ink);}
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px;}
.tag{
  display:inline-flex;align-items:center;font-size:13px;font-weight:600;color:var(--txt-2);
  background:var(--sand);border-radius:var(--r-pill);padding:6px 14px;
  transition:background .18s var(--ease),color .18s var(--ease);
}
.tag:hover{background:var(--ink);color:var(--txt-dark-1);}

/* ---------- article ---------- */
.progress-bar{position:fixed;top:0;left:0;height:2px;width:0;background:var(--brand);z-index:120;}
.crumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--txt-3);padding:28px 0 0;
}
.crumb a{color:var(--txt-3);transition:color .18s var(--ease);}
.crumb a:hover{color:var(--ink);text-decoration:underline;}
.crumb .sep{color:var(--txt-3);}
.crumb-current{max-width:340px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--txt-2);}
.article-head{max-width:760px;margin:0 auto;padding:40px 0 32px;}
.article-head h1{
  font-size:clamp(30px,4.2vw,48px);font-weight:900;line-height:1.15;letter-spacing:-.02em;
  margin:16px 0 18px;color:var(--ink);
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:13px;color:var(--txt-3);}
.meta-row .dot{color:var(--line);}
.article-cover{max-width:900px;margin:0 auto 40px;}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-md);}
.article-cover figcaption{margin-top:12px;font-size:12px;color:var(--txt-3);text-align:center;}
.article-wrap{max-width:760px;margin:0 auto;padding-bottom:8px;}
.article-body{font-size:17px;line-height:1.9;color:var(--txt);}
.article-body p{margin:0 0 1.2em;}
.article-body h2{
  position:relative;font-size:26px;font-weight:800;line-height:1.35;color:var(--ink);
  margin:48px 0 16px;padding-left:14px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:9px;width:3px;height:22px;background:var(--brand);border-radius:2px;
}
.article-body h3{font-size:19px;font-weight:700;line-height:1.45;color:var(--ink);margin:32px 0 12px;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:0;}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:8px;}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;background:var(--brand);border-radius:1px;
}
.article-body ol{counter-reset:ol;}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:10px;counter-increment:ol;}
.article-body ol li::before{
  content:counter(ol,decimal-leading-zero);position:absolute;left:0;top:0;
  font-size:14px;font-weight:800;color:var(--brand);
}
.article-body blockquote{
  margin:24px 0;padding:20px;background:var(--sand);border-left:3px solid var(--brand);
  border-radius:0 var(--r-sm) var(--r-sm) 0;font-size:15px;line-height:1.85;color:var(--txt-2);
}
.article-body img{width:100%;border-radius:var(--r-md);margin:24px 0 12px;}
.article-body a{color:var(--ink);border-bottom:1px solid var(--txt-3);transition:border-color .18s var(--ease);}
.article-body a:hover{border-bottom:2px solid var(--brand);}
.article-body table{width:100%;border-collapse:collapse;margin:24px 0;font-size:14px;display:block;overflow-x:auto;}
.article-body th,.article-body td{border:1px solid var(--line);padding:12px 14px;text-align:left;}
.article-body th{background:var(--sand);font-weight:700;}
.article-body code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
  background:var(--sand);padding:2px 6px;border-radius:4px;
}
.article-body pre{
  background:var(--ink);color:var(--txt-dark-1);padding:20px;border-radius:var(--r-md);
  overflow-x:auto;font-size:13px;line-height:1.7;margin:24px 0;
}
.article-body pre code{background:none;padding:0;color:inherit;}
.article-body hr{border:none;border-top:1px solid var(--line);margin:40px 0;}

.article-empty{
  max-width:760px;margin:0 auto;padding:48px;text-align:center;
  background:var(--paper);border:1px dashed var(--line);border-radius:var(--r-md);
}
.article-empty svg{color:var(--txt-3);margin-bottom:16px;}
.article-empty p{font-size:16px;color:var(--txt-2);margin-bottom:20px;}

.article-foot{max-width:760px;margin:56px auto 0;padding-top:32px;border-top:1px solid var(--line);}
.share-row{display:flex;align-items:center;gap:12px;margin-top:28px;}
.share-row span{font-size:13px;color:var(--txt-3);}
.icon-btn{
  display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
  border:1px solid var(--line);border-radius:var(--r-pill);background:var(--paper);color:var(--txt-2);
  transition:background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.icon-btn:hover{background:var(--ink);color:var(--txt-dark-1);border-color:var(--ink);}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:760px;margin:40px auto 0;}
.post-nav-card{
  display:block;padding:20px;border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--paper);box-shadow:var(--sh-1);
  transition:border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.post-nav-card:hover{border-color:var(--ink);transform:translateY(-2px);box-shadow:var(--sh-2);}
.post-nav-card em{display:block;font-style:normal;font-size:12px;color:var(--txt-3);margin-bottom:6px;}
.post-nav-card strong{display:block;font-size:16px;font-weight:700;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.post-nav-card.is-static{background:var(--sand);border-style:dashed;cursor:default;}
.post-nav-card.is-static:hover{transform:none;border-color:var(--line);box-shadow:none;}

/* ---------- sections ---------- */
.section{padding:96px 0;}
.section-sand{background:var(--sand);}
.section-dark{background:var(--ink);color:var(--txt-dark-1);}
.section-head{max-width:760px;margin-bottom:40px;}
.kicker{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.12em;
  color:var(--txt-3);margin-bottom:12px;
}
.section-dark .kicker{color:var(--txt-dark-2);}
.section-head h2{font-size:clamp(26px,3.2vw,40px);font-weight:900;line-height:1.2;color:var(--ink);letter-spacing:-.02em;}
.section-dark .section-head h2{color:var(--txt-dark-1);}
.section-head p{margin-top:16px;color:var(--txt-2);font-size:16px;}

.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.card{
  display:block;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
  padding:20px;box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);}
.card img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-sm);margin-bottom:16px;}
.card h3{font-size:18px;font-weight:700;line-height:1.45;margin:10px 0 8px;color:var(--ink);}
.card p{font-size:14px;color:var(--txt-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.card-meta{margin-top:14px;font-size:13px;color:var(--txt-3);display:flex;align-items:center;gap:8px;}

.cta-band{background:var(--sand);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:40px 0;}
.cta-inner h2{font-size:clamp(20px,2.4vw,28px);font-weight:900;color:var(--ink);line-height:1.3;}
.cta-inner p{margin-top:8px;font-size:15px;color:var(--txt-2);}

/* FAQ */
.faq-list{max-width:800px;margin:0 auto;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:none;border:none;padding:0;min-height:64px;text-align:left;cursor:pointer;
  font-size:17px;font-weight:700;color:var(--ink);transition:color .18s var(--ease);
}
.faq-q:hover{color:#3c443c;}
.faq-icon{
  flex-shrink:0;width:24px;height:24px;position:relative;
  transition:transform .24s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--ink);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:1.5px;}
.faq-icon::after{width:1.5px;height:14px;}
.faq-item.is-open .faq-icon{transform:rotate(45deg);}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--brand);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .24s var(--ease);
}
.faq-a p{max-width:680px;padding-bottom:22px;font-size:15px;line-height:1.85;color:var(--txt-2);}

/* back to top */
.to-top{
  position:fixed;right:24px;bottom:88px;z-index:70;
  width:48px;height:48px;border-radius:var(--r-pill);border:none;
  background:var(--ink);color:#fff;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
}
.to-top.is-on{opacity:1;visibility:visible;transform:none;}

/* sticky cta */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:75;
  height:64px;background:var(--ink);border-top:1px solid var(--line-dark);
  display:none;align-items:center;justify-content:space-between;gap:16px;
  padding:0 20px calc(0px + env(safe-area-inset-bottom));
}
.sticky-cta span{font-size:15px;font-weight:600;color:var(--txt-dark-1);}

/* footer */
.site-footer{background:var(--ink);color:var(--txt-dark-2);padding:64px 0 0;border-top:1px solid var(--line-dark);}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:48px;}
.footer-brand .logo{margin-bottom:16px;}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--txt-dark-2);max-width:320px;}
.social-row{display:flex;gap:10px;margin-top:20px;}
.social-row a{
  display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;
  border:1px solid var(--line-dark);border-radius:var(--r-pill);color:var(--txt-dark-2);
  transition:color .18s var(--ease),border-color .18s var(--ease);
}
.social-row a:hover{color:var(--brand);border-color:var(--brand);}
.footer-col h4{font-size:14px;font-weight:700;color:var(--txt-dark-1);margin-bottom:16px;}
.footer-col ul li{margin-bottom:10px;font-size:14px;line-height:1.7;}
.footer-col a{color:var(--txt-3);transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding:24px 0;border-top:1px solid var(--line-dark);font-size:13px;color:var(--txt-3);
}
.footer-links{display:flex;flex-wrap:wrap;gap:20px;}
.footer-links a{color:var(--txt-3);transition:color .18s var(--ease);}
.footer-links a:hover{color:var(--brand);}

/* reveal */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .24s var(--ease),transform .24s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}

/* responsive */
@media (max-width:1024px){
  .nav-toggle{display:inline-flex;}
  .header-actions .btn-ghost{display:none;}
  .main-nav{
    position:fixed;left:0;right:0;top:var(--header-h);bottom:0;margin:0;
    background:var(--ink);overflow-y:auto;padding:8px 20px 48px;
    opacity:0;visibility:hidden;transform:translateY(-8px);
    transition:opacity .18s var(--ease),transform .18s var(--ease),visibility .18s;
  }
  body.nav-open .main-nav{opacity:1;visibility:visible;transform:none;}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;}
  .nav-menu > li{border-bottom:1px solid var(--line-dark);}
  .nav-menu > li > a{display:block;padding:16px 0;font-size:18px;}
  .nav-menu > li > a::after{display:none;}
  .mega{
    position:static;transform:none;width:auto;opacity:1;visibility:visible;
    box-shadow:none;border:none;background:transparent;border-radius:0;
    grid-template-columns:1fr;padding:0 0 20px;gap:20px;display:none;
  }
  .has-menu:hover .mega,.has-menu:focus-within .mega{display:grid;transform:none;}
  .mega h4{color:var(--txt-dark-2);}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}
@media (max-width:768px){
  :root{--header-h:60px;}
  .section{padding:56px 0;}
  .grid-3{grid-template-columns:1fr;}
  .post-nav{grid-template-columns:1fr;}
  .cta-inner{flex-direction:column;align-items:flex-start;padding:32px 0;}
  .sticky-cta{display:flex;}
  .to-top{display:none;}
  .article-empty{padding:32px 20px;}
}
@media (max-width:520px){
  .nav-menu > li > a{font-size:16px;padding:14px 0;}
  .article-head h1{font-size:28px;}
  .article-body{font-size:16px;}
  .article-body h2{font-size:22px;}
  .footer-grid{grid-template-columns:1fr;}
  .sticky-cta span{font-size:14px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category2 */
:root{
  --ink:#0F1210;
  --ink-2:#171B18;
  --line-dark:rgba(255,255,255,.10);
  --brand:#C7F53F;
  --brand-hover:#B8E62F;
  --brand-ink:#0F1210;
  --mint:#4FD1A5;
  --sand:#F6F5F1;
  --paper:#FFFFFF;
  --line:#E3E2DC;
  --txt:#101310;
  --txt-2:#5C635E;
  --txt-3:#8B918C;
  --danger:#E5484D;
  --light-txt:#F2F4F0;
  --light-txt-2:#A9B2A8;
  --r-sm:6px;
  --r-md:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,19,16,.05);
  --sh-2:0 10px 28px rgba(16,19,16,.10);
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.8;
  color:var(--txt);
  background:var(--paper);
  padding-bottom:64px;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:900;line-height:1.2;letter-spacing:-.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:none;padding:0}
svg{display:block}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.nums{font-variant-numeric:tabular-nums}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:700;letter-spacing:.01em;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),transform 180ms var(--ease),border-color 180ms var(--ease);
  white-space:nowrap;
}
.btn-primary{background:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:var(--brand-hover);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0);filter:brightness(.94)}
.btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.35);color:var(--light-txt)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost-dark{background:transparent;border:1px solid var(--line);color:var(--txt)}
.btn-ghost-dark:hover{border-color:var(--ink);background:var(--sand)}
.btn-lg{height:52px}
.btn-sm{height:40px;padding:0 20px;font-size:14px}
.btn .arrow{transition:transform 180ms var(--ease)}
.btn:hover .arrow{transform:translateX(3px)}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--ink);
  border-bottom:1px solid var(--line-dark);
  transition:background-color 200ms var(--ease),backdrop-filter 200ms var(--ease);
}
.site-header.is-scrolled{background:rgba(15,18,16,.92);backdrop-filter:blur(8px)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{position:relative;width:22px;height:22px;border-radius:var(--r-sm);background:var(--brand);flex:none}
.logo-mark::after{content:"";position:absolute;inset:8px 6px 6px 8px;background:var(--ink);border-radius:2px}
.logo-text{font-size:17px;font-weight:800;letter-spacing:-.02em;color:var(--light-txt)}

.main-nav{flex:1;display:flex;justify-content:center}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu > li{position:relative}
.nav-menu > li > a{
  position:relative;display:inline-flex;align-items:center;height:var(--nav-h);
  font-size:14px;font-weight:600;color:#C6CDC4;transition:color 180ms var(--ease);
}
.nav-menu > li > a::after{
  content:"";position:absolute;left:0;right:0;bottom:20px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform 200ms var(--ease);
}
.nav-menu > li > a:hover{color:var(--brand)}
.nav-menu > li > a:hover::after{transform:scaleX(1)}
.nav-menu > li > a.is-active{color:var(--brand)}
.nav-menu > li > a.is-active::after{transform:scaleX(1)}

.nav-actions{display:flex;align-items:center;gap:12px;flex:none}
.nav-actions .btn{height:40px;padding:0 18px;font-size:14px}

.mega{
  position:absolute;top:calc(var(--nav-h) - 6px);left:50%;transform:translate(-50%,-6px);
  width:720px;padding:24px;display:grid;grid-template-columns:1fr 1fr 1.1fr;gap:24px;
  background:#141815;border:1px solid var(--line-dark);border-radius:var(--r-md);
  box-shadow:0 24px 60px rgba(0,0,0,.45);
  opacity:0;visibility:hidden;pointer-events:none;
  transition:opacity 160ms var(--ease),transform 160ms var(--ease),visibility 160ms;
}
.has-menu:hover .mega,.has-menu:focus-within .mega{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0)}
.mega h4{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--light-txt-2);margin-bottom:12px}
.mega-list li + li{margin-top:2px}
.mega-list a{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:8px 10px;border-radius:var(--r-sm);font-size:14px;font-weight:600;color:#D5DBD3;
  transition:background-color 160ms var(--ease),color 160ms var(--ease);
}
.mega-list a:hover{background:rgba(199,245,63,.08);color:var(--brand)}
.mega-count{font-size:11px;font-weight:600;color:var(--light-txt-2);border:1px solid var(--line-dark);border-radius:var(--r-pill);padding:1px 8px}
.mega-card{display:block;border:1px solid var(--line-dark);border-radius:var(--r-md);overflow:hidden;background:var(--ink-2)}
.mega-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.mega-card-body{display:block;padding:14px}
.mega-card-body strong{display:block;font-size:14px;font-weight:700;color:var(--light-txt)}
.mega-card-body span{display:block;margin-top:4px;font-size:13px;color:var(--light-txt-2)}
.mega-card:hover strong{color:var(--brand)}

.nav-toggle{display:none;width:40px;height:40px;border:1px solid var(--line-dark);border-radius:var(--r-sm);align-items:center;justify-content:center}
.nav-toggle span{position:relative;display:block;width:16px;height:1.5px;background:var(--light-txt)}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:16px;height:1.5px;background:var(--light-txt)}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}

/* ---------- 页头 ---------- */
.page-hero{
  position:relative;color:var(--light-txt);
  background-image:linear-gradient(180deg,rgba(15,18,16,.66),rgba(15,18,16,.82)),url("/assets/images/backpic/back-2.png");
  background-size:cover;background-position:center;
  padding:88px 0 72px;
}
.page-hero .kicker{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--light-txt-2);
  border:1px solid var(--line-dark);border-radius:var(--r-pill);padding:5px 14px;margin-bottom:20px;
}
.page-hero .kicker i{width:6px;height:6px;border-radius:50%;background:var(--brand);display:block}
.page-hero h1{
  font-size:clamp(30px,4.2vw,48px);font-weight:900;line-height:1.15;letter-spacing:-.02em;
  max-width:820px;
}
.page-hero p.lead{margin-top:18px;max-width:620px;font-size:16px;line-height:1.85;color:#D3D9D1}
.anchor-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:32px}
.anchor-pills a{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;
  border:1px solid var(--line-dark);border-radius:var(--r-pill);
  font-size:13px;font-weight:600;color:#D7DDD5;
  transition:background-color 180ms var(--ease),color 180ms var(--ease),border-color 180ms var(--ease);
}
.anchor-pills a:hover{background:var(--brand);color:var(--brand-ink);border-color:var(--brand)}

/* ---------- 面包屑 ---------- */
.crumb-bar{background:var(--paper);border-bottom:1px solid var(--line)}
.crumb{display:flex;align-items:center;gap:8px;height:52px;font-size:13px;color:var(--txt-3)}
.crumb a{color:var(--txt-2);transition:color 160ms var(--ease)}
.crumb a:hover{color:var(--ink);text-decoration:underline;text-underline-offset:3px}
.crumb .sep{color:var(--txt-3)}
.crumb .cur{color:var(--ink);font-weight:600}

/* ---------- 通用板块 ---------- */
.section{padding:96px 0}
.section-sand{background:var(--sand)}
.kicker-txt{font-size:12px;font-weight:600;letter-spacing:.12em;color:var(--txt-3);display:block;margin-bottom:14px}
.section-title{font-size:clamp(26px,3.2vw,40px);font-weight:900;line-height:1.2}
.section-sub{margin-top:16px;max-width:640px;font-size:16px;color:var(--txt-2)}

/* ---------- 引言 ---------- */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.intro-grid h2{font-size:clamp(22px,2.4vw,30px);line-height:1.3}
.intro-mark{width:3px;height:28px;background:var(--brand);margin-bottom:20px}
.intro-copy p{font-size:16.5px;line-height:1.9;color:var(--txt-2)}
.intro-copy p + p{margin-top:18px}
.fact-row{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:40px;border-top:1px solid var(--line);padding-top:28px}
.fact-row .num{font-size:32px;font-weight:900;color:var(--ink);letter-spacing:-.02em}
.fact-row .lab{margin-top:6px;font-size:13px;color:var(--txt-3)}

/* ---------- 编号章节 ---------- */
.chapters{border-top:1px solid var(--line)}
.chapter{padding:88px 0;border-bottom:1px solid var(--line)}
.chapter.is-sand{background:var(--sand)}
.chapter-inner{display:grid;grid-template-columns:120px 1fr;gap:32px;align-items:start}
.chapter-num{
  font-size:64px;font-weight:900;line-height:1;letter-spacing:-.04em;
  color:rgba(16,19,16,.10);font-variant-numeric:tabular-nums;
}
.chapter-body h2{font-size:clamp(22px,2.6vw,30px);line-height:1.28}
.chapter-body .para{margin-top:18px;max-width:720px;font-size:16.5px;line-height:1.9;color:var(--txt-2)}
.point-list{margin-top:24px;display:grid;grid-template-columns:1fr 1fr;gap:12px 32px;max-width:760px}
.point-list li{position:relative;padding-left:20px;font-size:15.5px;line-height:1.7;color:var(--txt)}
.point-list li::before{content:"";position:absolute;left:0;top:11px;width:8px;height:8px;background:var(--brand);border-radius:2px}
.chapter-fig{margin-top:32px;max-width:760px}
.chapter-fig img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-md);border:1px solid var(--line)}
.chapter-fig figcaption{margin-top:12px;font-size:13px;color:var(--txt-3)}

/* ---------- 章末 CTA 带 ---------- */
.cta-band{background:var(--sand);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.cta-band .inner{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:36px 0}
.cta-band .text{display:flex;align-items:center;gap:16px}
.cta-band .bar{width:3px;height:32px;background:var(--brand);flex:none}
.cta-band strong{display:block;font-size:19px;font-weight:800}
.cta-band span{display:block;margin-top:4px;font-size:14px;color:var(--txt-2)}

/* ---------- 链接卡 ---------- */
.linkcards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px}
.linkcard{
  display:block;background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
  overflow:hidden;box-shadow:var(--sh-1);
  transition:transform 180ms var(--ease),box-shadow 180ms var(--ease),border-color 180ms var(--ease);
}
.linkcard:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:#D6D5CC}
.linkcard img{width:100%;aspect-ratio:16/9;object-fit:cover}
.linkcard .body{padding:20px}
.linkcard .tag{
  display:inline-flex;align-items:center;height:22px;padding:0 10px;border-radius:var(--r-pill);
  background:rgba(79,209,165,.12);color:var(--ink);font-size:12px;font-weight:600;
}
.linkcard h3{margin-top:12px;font-size:16px;font-weight:700;line-height:1.45}
.linkcard time{display:block;margin-top:12px;font-size:13px;color:var(--txt-3);font-variant-numeric:tabular-nums}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-list{margin-top:36px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;
  min-height:64px;padding:14px 0;text-align:left;
  font-size:17px;font-weight:700;color:var(--ink);
  transition:color 180ms var(--ease);
}
.faq-q:hover{color:var(--txt-2)}
.faq-icon{position:relative;width:20px;height:20px;flex:none;transition:transform 240ms var(--ease)}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--ink);border-radius:2px}
.faq-icon::before{left:0;top:9px;width:20px;height:2px}
.faq-icon::after{left:9px;top:0;width:2px;height:20px}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-item.is-open .faq-icon::before,.faq-item.is-open .faq-icon::after{background:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms var(--ease)}
.faq-a p{max-width:680px;padding:0 0 22px;font-size:15px;line-height:1.85;color:var(--txt-2)}

/* ---------- 底部固定转化条 ---------- */
.sticky-cta{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:var(--ink);border-top:1px solid var(--line-dark);
  padding-bottom:env(safe-area-inset-bottom);
}
.sticky-cta .inner{display:flex;align-items:center;justify-content:space-between;gap:20px;height:64px}
.sticky-cta p{font-size:15px;font-weight:600;color:var(--light-txt)}
.sticky-cta .btn{height:40px;padding:0 20px;font-size:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--light-txt-2);padding:64px 0 32px;border-top:1px solid var(--line-dark)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand p{font-size:14px;line-height:1.8;color:var(--light-txt-2);max-width:320px}
.social-row{display:flex;gap:10px;margin-top:20px}
.social-row a{
  display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line-dark);color:var(--light-txt-2);
  transition:color 180ms var(--ease),border-color 180ms var(--ease);
}
.social-row a:hover{color:var(--brand);border-color:var(--brand)}
.footer-col h4{font-size:13px;font-weight:700;color:var(--light-txt);letter-spacing:.06em;margin-bottom:16px}
.footer-col li + li{margin-top:10px}
.footer-col a,.footer-col span{font-size:14px;color:var(--light-txt-2);transition:color 180ms var(--ease)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  margin-top:48px;padding-top:24px;border-top:1px solid var(--line-dark);
  font-size:13px;color:var(--txt-3);
}
.footer-links{display:flex;gap:20px}
.footer-links a{font-size:13px;color:var(--txt-3);transition:color 180ms var(--ease)}
.footer-links a:hover{color:var(--brand)}

/* ---------- 进场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity 240ms var(--ease),transform 240ms var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (min-width:1280px){
  .container{padding:0 32px}
}
@media (max-width:1024px){
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;left:0;right:0;top:var(--nav-h);bottom:0;
    background:var(--ink);padding:16px 24px 40px;overflow-y:auto;
    display:none;flex-direction:column;justify-content:flex-start;
  }
  .nav-open .main-nav{display:flex}
  .nav-menu{flex-direction:column;align-items:stretch;gap:0;width:100%}
  .nav-menu > li > a{height:56px;font-size:18px;border-bottom:1px solid var(--line-dark);justify-content:flex-start}
  .nav-menu > li > a::after{display:none}
  .mega{
    position:static;transform:none;opacity:1;visibility:visible;pointer-events:auto;
    width:100%;grid-template-columns:1fr;box-shadow:none;border:none;background:transparent;
    padding:8px 0 20px;
  }
  .nav-actions .btn-ghost{display:none}
  .intro-grid{grid-template-columns:1fr;gap:28px}
  .linkcards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .page-hero{padding:64px 0 56px}
  .chapter{padding:56px 0}
  .chapter-inner{grid-template-columns:1fr;gap:12px}
  .chapter-num{font-size:44px}
  .point-list{grid-template-columns:1fr}
  .cta-band .inner{flex-direction:column;align-items:flex-start;padding:28px 0}
  .linkcards{grid-template-columns:1fr}
  .fact-row{grid-template-columns:1fr 1fr;gap:20px}
  .sticky-cta p{font-size:14px}
}
@media (max-width:520px){
  .logo-text{font-size:15px}
  .nav-actions .btn{display:none}
  .fact-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .sticky-cta .inner{gap:12px}
  .sticky-cta .btn{padding:0 14px;font-size:13px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important}
  .reveal{transform:none}
}