/* roulang page: index */
:root{
  --brand-600:#2E6E63;
  --brand-500:#3F8C7E;
  --brand-700:#1B3B35;
  --brand-900:#0C1E1B;
  --brand-100:#DDEBE6;
  --accent-500:#E8804A;
  --accent-100:#FBE7DC;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EFEBE3;
  --ink:#16211E;
  --ink-2:#5A655F;
  --line:#E3DED3;
  --danger:#C2483A;
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --r-card:18px;
  --r-nav:20px;
  --r-btn:12px;
  --r-img:14px;
  --r-cta:24px;
  --shadow-1:0 1px 2px rgba(12,30,27,.04),0 12px 32px -12px rgba(12,30,27,.12);
  --shadow-2:0 18px 40px -16px rgba(12,30,27,.22);
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
time,.num{font-variant-numeric:tabular-nums}
:focus-visible{outline:3px solid rgba(46,110,99,.3);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
.section{padding:96px 0}
.section--tight{padding:72px 0}
.section--alt{background:var(--surface-2)}
.section--dark{background:var(--brand-900);color:#E6EFEB}
.eyebrow{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:999px;background:var(--brand-100);color:var(--brand-700);font-size:13px;font-weight:600;letter-spacing:.02em}
.h1{font-size:clamp(28px,4.4vw,44px);line-height:1.25;font-weight:700;letter-spacing:-.01em}
.h2{font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.h3{font-size:20px;line-height:1.4;font-weight:600}
.lead{font-size:17px;line-height:1.85;color:var(--ink-2);max-width:44em}
.section-head{max-width:720px;margin-bottom:40px}
.section-head .h2{margin-top:14px}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:16px;max-width:44em}
.section--dark .section-head p,.section--dark .lead{color:#A9C1B9}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;height:48px;padding:0 22px;border-radius:var(--r-btn);font-size:15px;font-weight:600;border:1.5px solid transparent;cursor:pointer;transition:transform var(--ease),background var(--ease),color var(--ease),box-shadow var(--ease),border-color var(--ease)}
.btn-primary{background:var(--brand-600);color:#fff;box-shadow:var(--shadow-1)}
.btn-primary:hover{background:var(--brand-500);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--brand-700);border-color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100)}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{background:var(--brand-100)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--brand-600);font-weight:600;font-size:14px;border-bottom:2px solid rgba(46,110,99,.28);padding-bottom:2px;transition:color var(--ease),border-color var(--ease)}
.text-link:hover{color:var(--accent-500);border-color:rgba(232,128,74,.5)}
.badge{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:999px;background:var(--brand-100);color:var(--brand-700);font-size:12.5px;font-weight:600}
.badge--accent{background:var(--accent-100);color:#A8531F}

/* 头部导航 */
.site-header{position:sticky;top:0;z-index:80;padding:10px 0;background:rgba(247,245,240,.9);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px)}
.nav-panel{position:relative;display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-nav);padding:10px 12px;box-shadow:var(--shadow-1)}
.brand{display:inline-flex;align-items:center;gap:10px;padding:0 6px;flex-shrink:0}
.brand-mark{display:grid;place-items:center;width:38px;height:38px;border-radius:12px;background:var(--brand-600);flex-shrink:0}
.brand-mark svg{width:20px;height:20px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:-.01em}
.brand-text span{font-size:11.5px;color:var(--ink-2);letter-spacing:.06em}
.nav-links{display:flex;align-items:center;gap:6px;flex:1;justify-content:center}
.nav-chip{display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 14px;border-radius:12px;border:1px solid transparent;color:var(--ink-2);font-size:14px;font-weight:500;transition:background var(--ease),color var(--ease),border-color var(--ease)}
.nav-chip i{font-size:13px}
.nav-chip:hover{background:var(--surface-2);color:var(--ink)}
.nav-chip.active{background:var(--brand-100);color:var(--brand-700);border-color:rgba(46,110,99,.18);font-weight:600}
.nav-chip.active::before{content:"";width:3px;height:18px;border-radius:2px;background:var(--brand-600);flex-shrink:0}
.nav-chip--cta{display:none}
.nav-cta{flex-shrink:0;height:44px;padding:0 18px;font-size:14.5px}
.nav-toggle{display:none;align-items:center;justify-content:center;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:var(--surface-2);color:var(--ink);cursor:pointer}
.nav-toggle i{font-size:16px}

/* 首屏 */
.hero{padding:56px 0 88px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-120px;right:-160px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(221,235,230,.9),rgba(221,235,230,0) 68%);pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:52px;align-items:center}
.hero h1{margin-top:20px}
.hero-sub{margin-top:18px;font-size:17.5px;line-height:1.8;color:var(--ink-2);max-width:32em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-trust{display:flex;flex-wrap:wrap;gap:22px;margin-top:32px;padding-top:24px;border-top:1px solid var(--line)}
.hero-trust li{display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--ink-2)}
.hero-trust i{color:var(--brand-600);font-size:14px}
.hero-media{position:relative}
.hero-media::before{content:"";position:absolute;right:-20px;bottom:-20px;width:62%;height:60%;background:var(--brand-100);border-radius:var(--r-cta)}
.hero-media img{position:relative;z-index:1;width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--r-img);border:1px solid rgba(46,110,99,.22);background:var(--brand-100)}
.hero-caption{position:relative;z-index:1;margin-top:14px;font-size:13px;color:var(--ink-2);text-align:right}
.card-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:64px;position:relative}
.strip-card{display:flex;align-items:flex-start;gap:14px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:20px;box-shadow:var(--shadow-1);transition:transform var(--ease),box-shadow var(--ease)}
.strip-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.strip-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:14px;background:var(--brand-100);color:var(--brand-700);flex-shrink:0}
.strip-card h3{font-size:16px;font-weight:600}
.strip-card p{font-size:13.5px;color:var(--ink-2);line-height:1.7;margin-top:4px}

/* 品牌主张 */
.split{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:52px;align-items:center}
.claim-list{margin-top:26px;display:grid;gap:14px}
.claim-list li{display:flex;gap:12px;align-items:flex-start;font-size:15.5px;color:var(--ink)}
.claim-list i{color:var(--brand-600);margin-top:6px;font-size:13px}
.media-block{position:relative;border-radius:var(--r-cta);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1)}
.media-block img{width:100%;aspect-ratio:4/3;object-fit:cover}
.media-tag{position:absolute;left:18px;bottom:18px;background:rgba(255,255,255,.94);border-radius:999px;padding:8px 16px;font-size:13px;font-weight:600;color:var(--brand-700)}

/* 时间线 */
.timeline{margin-top:8px;border-left:1px solid var(--line);padding-left:0}
.timeline li{position:relative;padding:0 0 34px 40px}
.timeline li:last-child{padding-bottom:0}
.timeline li::before{content:attr(data-step);position:absolute;left:-18px;top:0;width:36px;height:36px;border-radius:50%;background:var(--brand-600);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700}
.timeline h3{font-size:18px;font-weight:600}
.timeline p{margin-top:8px;font-size:15px;color:var(--ink-2);max-width:42em}

/* 精选内容 */
.feature-grid{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);gap:28px;align-items:start}
.feature-large{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-1);transition:transform var(--ease),box-shadow var(--ease)}
.feature-large:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.feature-large .thumb{overflow:hidden}
.feature-large img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform var(--ease)}
.feature-large:hover img{transform:scale(1.03)}
.feature-body{padding:24px}
.feature-body h3{font-size:22px;line-height:1.4;font-weight:600;margin-top:12px}
.feature-body p{margin-top:10px;font-size:14.5px;color:var(--ink-2)}
.feature-list{display:grid;gap:16px}
.mini-card{display:grid;grid-template-columns:118px minmax(0,1fr);gap:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:14px;transition:transform var(--ease),box-shadow var(--ease)}
.mini-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.mini-card img{width:118px;aspect-ratio:4/3;object-fit:cover;border-radius:12px}
.mini-card h3{font-size:16px;font-weight:600;line-height:1.5;margin-top:6px;transition:color var(--ease)}
.mini-card:hover h3{color:var(--brand-600)}
.mini-card p{margin-top:6px;font-size:13.5px;color:var(--ink-2);line-height:1.65}
.mini-meta{margin-top:8px;font-size:12.5px;color:#9AA39E}

/* 分类入口 */
.cat-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.cat-card{position:relative;display:block;border-radius:var(--r-cta);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-1);transition:transform var(--ease),box-shadow var(--ease)}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.cat-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.cat-card .cat-overlay{position:absolute;inset:0;background:linear-gradient(180deg,rgba(12,30,27,0) 38%,rgba(12,30,27,.86) 100%);display:flex;flex-direction:column;justify-content:flex-end;padding:26px;color:#fff}
.cat-card h3{font-size:21px;font-weight:600}
.cat-card p{margin-top:8px;font-size:14px;color:#C9D6D1;max-width:30em}
.cat-card span.more{margin-top:14px;font-size:13.5px;font-weight:600;color:#8FD1C0}

/* 最新信息 */
.news-layout{display:grid;grid-template-columns:minmax(0,8fr) minmax(0,4fr);gap:32px;align-items:start}
.news-list{display:grid;gap:16px}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px 24px;transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease)}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.news-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.news-time{font-size:13px;color:var(--ink-2)}
.news-card h3{margin-top:12px;font-size:18px;font-weight:600;line-height:1.5}
.news-card h3 a{transition:color var(--ease)}
.news-card h3 a:hover{color:var(--brand-600)}
.news-card p{margin-top:8px;font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card .text-link{margin-top:12px}
.news-side{position:sticky;top:96px;display:grid;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);padding:22px}
.side-card h3{font-size:16px;font-weight:600}
.side-card p{margin-top:8px;font-size:13.5px;color:var(--ink-2)}
.side-links{margin-top:14px;display:grid;gap:10px}
.side-links a{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;border-radius:12px;background:var(--surface-2);font-size:14px;transition:background var(--ease),color var(--ease)}
.side-links a:hover{background:var(--brand-100);color:var(--brand-700)}
.side-links i{font-size:12px;color:var(--brand-600)}
.empty-state{background:var(--brand-100);border-radius:var(--r-card);padding:32px;text-align:center}
.empty-state p{color:var(--brand-700);font-size:15px}
.empty-state .btn{margin-top:18px}

/* 评价/数据 */
.metric-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:8px}
.metric-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--r-card);padding:26px}
.metric-card .value{font-size:36px;font-weight:700;line-height:1.1;color:#8FD1C0;font-variant-numeric:tabular-nums}
.metric-card .value em{font-size:16px;font-style:normal;margin-left:6px;color:#C9D6D1}
.metric-card h3{margin-top:14px;font-size:16px;font-weight:600;color:#fff}
.metric-card p{margin-top:8px;font-size:14px;color:#A9C1B9}
.dark-split{display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);gap:48px;align-items:start}

/* FAQ */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);margin-bottom:12px;overflow:hidden;transition:box-shadow var(--ease)}
.faq-item[open]{box-shadow:var(--shadow-1)}
.faq-item summary{display:flex;align-items:center;gap:14px;min-height:56px;padding:12px 22px;cursor:pointer;font-size:16px;font-weight:600;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .q-mark{color:var(--brand-600);font-weight:700}
.faq-item summary .faq-icon{margin-left:auto;color:var(--brand-600);transition:transform var(--ease)}
.faq-item[open] summary .faq-icon{transform:rotate(180deg)}
.faq-item .faq-body{padding:0 22px 22px 56px;font-size:15px;color:var(--ink-2)}

/* CTA */
.cta-card{position:relative;overflow:hidden;background:var(--brand-600);border-radius:var(--r-cta);padding:52px;color:#fff;text-align:center}
.cta-card::after{content:"";position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);background-size:18px 18px;opacity:.08;pointer-events:none}
.cta-card h2{position:relative;font-size:clamp(22px,3vw,30px);font-weight:700}
.cta-card p{position:relative;margin-top:12px;font-size:15.5px;color:rgba(255,255,255,.86)}
.subscribe{position:relative;display:flex;gap:12px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.subscribe input{height:46px;min-width:280px;padding:0 16px;border-radius:12px;border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.14);color:#fff;transition:border-color var(--ease),box-shadow var(--ease)}
.subscribe input::placeholder{color:rgba(255,255,255,.66)}
.subscribe input:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.22)}
.form-note{position:relative;margin-top:14px;font-size:13.5px;color:rgba(255,255,255,.82);min-height:20px}

/* 页脚 */
.site-footer{background:var(--brand-900);color:#C9D6D1;padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-grid h3{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:17px;font-weight:700;margin-bottom:14px}
.footer-brand .brand-mark{background:var(--brand-500)}
.footer-grid p{font-size:13.5px;line-height:1.8;color:#9FB5AD}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:#C9D6D1;transition:color var(--ease)}
.footer-links a:hover{color:#6FB8A8}
.footer-bottom{margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#8FA8A0}

/* 响应式 */
@media (max-width:1180px){
  .nav-chip{padding:0 11px;font-size:13.5px}
  .nav-chip i{display:none}
}
@media (max-width:1023px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .section--tight{padding:56px 0}
  .nav-toggle{display:inline-flex}
  .nav-links{position:absolute;top:calc(100% + 10px);left:0;right:0;display:none;grid-template-columns:1fr 1fr;gap:10px;padding:12px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-nav);box-shadow:var(--shadow-2)}
  .nav-links.is-open{display:grid}
  .nav-chip{height:48px;width:100%;justify-content:flex-start;background:var(--surface-2)}
  .nav-chip i{display:inline-block}
  .nav-chip--cta{display:inline-flex;background:var(--brand-600);color:#fff;grid-column:span 2;justify-content:center}
  .nav-chip--cta:hover{background:var(--brand-500);color:#fff}
  .nav-cta{display:none}
  .hero{padding:36px 0 64px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media::before{right:-12px;bottom:-12px}
  .card-strip{grid-template-columns:1fr;gap:14px;margin-top:40px}
  .split{grid-template-columns:1fr;gap:36px}
  .feature-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .news-layout{grid-template-columns:1fr}
  .news-side{position:static}
  .metric-grid{grid-template-columns:1fr}
  .dark-split{grid-template-columns:1fr;gap:32px}
  .cta-card{padding:38px 24px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .brand-text span{display:none}
  .hero-actions .btn{width:100%}
  .hero-trust{gap:14px}
  .subscribe input{min-width:0;width:100%}
  .subscribe .btn{width:100%}
  .mini-card{grid-template-columns:92px minmax(0,1fr)}
  .mini-card img{width:92px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}

/* roulang page: article */
:root{
  --brand-600:#2E6E63;
  --brand-500:#3F8C7E;
  --brand-700:#1B3B35;
  --brand-900:#0C1E1B;
  --brand-100:#DDEBE6;
  --accent-500:#E8804A;
  --accent-100:#FBE7DC;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EFEBE3;
  --ink:#16211E;
  --ink-2:#5A655F;
  --disabled:#9AA39E;
  --line:#E3DED3;
  --error:#C2483A;
  --r-card:18px;
  --r-panel:20px;
  --r-btn:12px;
  --r-img:14px;
  --r-cta:24px;
  --shadow-sm:0 1px 2px rgba(12,30,27,.04),0 12px 32px -12px rgba(12,30,27,.12);
  --shadow-lg:0 18px 40px -16px rgba(12,30,27,.22);
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;}
button,input{font-family:inherit;font-size:inherit;}
button{cursor:pointer;border:0;background:none;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4,p{margin:0;}
.container{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 32px;
}
:focus-visible{
  outline:3px solid rgba(46,110,99,.3);
  outline-offset:2px;
  border-radius:6px;
}
.num{font-variant-numeric:tabular-nums;}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(247,245,240,.9);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  padding:12px 0;
}
.nav-panel{
  display:flex;
  align-items:center;
  gap:16px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  box-shadow:var(--shadow-sm);
  padding:10px 12px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.brand-mark{
  width:40px;
  height:40px;
  border-radius:12px;
  background:var(--brand-600);
  display:flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
}
.brand-mark svg{width:22px;height:22px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.2px;}
.brand-text span{font-size:11.5px;color:var(--ink-2);letter-spacing:.4px;}
.nav-links{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
  flex-wrap:wrap;
}
.nav-chip{
  display:inline-flex;
  align-items:center;
  gap:7px;
  height:40px;
  padding:0 14px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--surface-2);
  color:var(--ink);
  font-size:14px;
  font-weight:500;
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.nav-chip i{font-size:13px;color:var(--brand-600);}
.nav-chip:hover{background:var(--brand-100);color:var(--brand-700);transform:translateY(-1px);}
.nav-chip.active{
  background:var(--brand-100);
  color:var(--brand-700);
  box-shadow:inset 3px 0 0 var(--brand-600);
  font-weight:600;
}
.nav-chip--cta{
  background:var(--brand-600);
  border-color:var(--brand-600);
  color:#fff;
  font-weight:600;
}
.nav-chip--cta i{color:#fff;}
.nav-chip--cta:hover{background:var(--brand-500);border-color:var(--brand-500);color:#fff;}
.nav-cta{margin-left:4px;}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  transition:background var(--ease),color var(--ease),transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.btn-primary{
  background:var(--brand-600);
  color:#fff;
  border:1px solid var(--brand-600);
}
.btn-primary:hover{background:var(--brand-500);border-color:var(--brand-500);transform:translateY(-1px);box-shadow:var(--shadow-lg);}
.btn-ghost{
  background:transparent;
  color:var(--brand-700);
  border:1.5px solid var(--brand-600);
}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-1px);}
.btn:active{transform:translateY(0);}
.nav-cta{height:40px;padding:0 18px;font-size:14px;}
.nav-toggle{
  display:none;
  width:42px;
  height:42px;
  border-radius:12px;
  border:1px solid var(--line);
  background:var(--surface-2);
  color:var(--brand-700);
  font-size:16px;
  margin-left:auto;
}

/* ---------- breadcrumb ---------- */
.crumb-bar{padding:26px 0 0;}
.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--ink-2);
}
.breadcrumb li{display:flex;align-items:center;gap:8px;}
.breadcrumb li+li::before{content:"/";color:#C6C0B3;}
.breadcrumb a:hover{color:var(--brand-600);}
.breadcrumb .current{color:var(--brand-600);font-weight:600;}

/* ---------- article head ---------- */
.article-hero{padding:22px 0 40px;}
.article-head{max-width:860px;}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:13px;
  font-weight:600;
  line-height:1;
}
.article-head h1{
  font-size:clamp(28px,4.4vw,44px);
  line-height:1.25;
  font-weight:700;
  margin:18px 0 16px;
  letter-spacing:-.3px;
}
.article-meta{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px 18px;
  font-size:13.5px;
  color:var(--ink-2);
}
.article-meta span{display:inline-flex;align-items:center;gap:7px;}
.article-meta i{color:var(--brand-600);font-size:13px;}
.article-cover{
  margin:28px 0 0;
  border-radius:var(--r-img);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--brand-100);
  box-shadow:var(--shadow-sm);
}
.article-cover img{
  width:100%;
  aspect-ratio:16/9;
  object-fit:cover;
}

/* ---------- article layout ---------- */
.article-main{padding:48px 0 88px;}
.article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 300px;
  gap:56px;
  align-items:start;
}
.article-body{
  max-width:760px;
  font-size:16.5px;
  line-height:1.85;
  color:var(--ink);
}
.article-body p{margin:0 0 1.1em;}
.article-body h2{
  font-size:clamp(22px,3vw,30px);
  line-height:1.35;
  font-weight:700;
  margin:2.4em 0 .8em;
  padding-left:14px;
  border-left:4px solid var(--brand-600);
  scroll-margin-top:96px;
}
.article-body h3{
  font-size:20px;
  line-height:1.4;
  font-weight:600;
  margin:1.6em 0 .6em;
  color:var(--brand-700);
}
.article-body h4{font-size:17px;font-weight:600;margin:1.4em 0 .5em;}
.article-body a{color:var(--brand-600);text-decoration:underline;text-underline-offset:3px;}
.article-body a:hover{color:var(--accent-500);}
.article-body strong{font-weight:700;}
.article-body img{
  width:100%;
  height:auto;
  border-radius:12px;
  margin:1.4em 0 .6em;
  border:1px solid var(--line);
}
.article-body figcaption{
  font-size:13px;
  color:var(--ink-2);
  text-align:center;
  margin-bottom:1.6em;
}
.article-body blockquote{
  margin:1.6em 0;
  padding:16px 22px;
  background:var(--brand-100);
  border-left:3px solid var(--brand-600);
  border-radius:0 12px 12px 0;
  color:var(--brand-700);
}
.article-body blockquote p:last-child{margin-bottom:0;}
.article-body ul,.article-body ol{margin:0 0 1.2em;padding-left:1.4em;}
.article-body ul{list-style:disc;}
.article-body ol{list-style:decimal;}
.article-body li{margin-bottom:.5em;}
.article-body ul ::marker,.article-body ol ::marker{color:var(--brand-600);}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:1.6em 0;
  font-size:15px;
  border:1px solid var(--line);
  border-radius:12px;
  overflow:hidden;
}
.article-body th,.article-body td{
  padding:12px 14px;
  border-bottom:1px solid var(--line);
  text-align:left;
}
.article-body th{background:var(--brand-100);color:var(--brand-700);font-weight:600;}
.article-body tr:nth-child(even) td{background:var(--surface-2);}
.article-body code{
  background:var(--surface-2);
  padding:2px 6px;
  border-radius:6px;
  font-size:14.5px;
}
.empty-state{
  background:var(--brand-100);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  padding:40px 32px;
  text-align:center;
  color:var(--brand-700);
}
.empty-state i{font-size:26px;display:block;margin-bottom:12px;color:var(--brand-600);}
.empty-state p{margin:0 0 18px;font-size:15.5px;}

/* ---------- article footer ---------- */
.article-foot{
  max-width:760px;
  margin-top:44px;
  padding-top:26px;
  border-top:1px solid var(--line);
}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px;}
.tag{
  display:inline-flex;
  align-items:center;
  height:26px;
  padding:0 12px;
  border-radius:999px;
  background:var(--brand-100);
  color:var(--brand-700);
  font-size:13px;
  font-weight:600;
}
.back-row{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- side ---------- */
.article-side{
  position:sticky;
  top:104px;
  display:grid;
  gap:20px;
}
.side-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--shadow-sm);
  padding:22px;
}
.side-card h3{
  font-size:16px;
  font-weight:700;
  margin-bottom:14px;
}
.side-list{display:grid;gap:12px;}
.side-list a{
  display:flex;
  gap:10px;
  font-size:14.5px;
  color:var(--ink);
  line-height:1.6;
  transition:color var(--ease),transform var(--ease);
}
.side-list a::before{
  content:"";
  width:6px;height:6px;
  border-radius:50%;
  background:var(--brand-600);
  margin-top:9px;
  flex:0 0 auto;
}
.side-list a:hover{color:var(--brand-600);transform:translateX(2px);}
.side-cta{
  background:var(--brand-700);
  border-color:var(--brand-700);
  color:#E4EFEB;
}
.side-cta h3{color:#fff;}
.side-cta p{font-size:14px;color:#BCCEC8;margin-bottom:16px;}
.side-cta .btn{
  width:100%;
  height:44px;
  background:var(--accent-500);
  border-color:var(--accent-500);
  color:#fff;
}
.side-cta .btn:hover{background:#F0945F;border-color:#F0945F;}

/* ---------- related ---------- */
.related{
  background:var(--surface-2);
  padding:88px 0;
  border-top:1px solid var(--line);
}
.section-head{max-width:720px;margin-bottom:36px;}
.section-head h2{
  font-size:clamp(22px,3vw,32px);
  line-height:1.3;
  font-weight:700;
  margin-bottom:12px;
}
.section-head p{color:var(--ink-2);font-size:15.5px;}
.card-grid-3{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:24px;
}
.card{
  display:flex;
  flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:transform var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.card-media{
  aspect-ratio:4/3;
  overflow:hidden;
  background:var(--brand-100);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform var(--ease);
}
.card:hover .card-media img{transform:scale(1.03);}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-body h3{font-size:17.5px;line-height:1.45;font-weight:600;transition:color var(--ease);}
.card:hover .card-body h3{color:var(--brand-600);}
.card-body p{font-size:14px;color:var(--ink-2);line-height:1.75;}
.card-foot{
  margin-top:auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:13px;
  color:var(--ink-2);
}
.link-more{
  color:var(--brand-600);
  font-weight:600;
  font-size:14px;
  border-bottom:2px solid rgba(46,110,99,.35);
  transition:color var(--ease),border-color var(--ease);
}
.link-more:hover{color:var(--accent-500);border-color:var(--accent-500);}

/* ---------- subscribe ---------- */
.subscribe{padding:88px 0;}
.subscribe-card{
  position:relative;
  overflow:hidden;
  background:var(--brand-600);
  border-radius:var(--r-cta);
  padding:52px 48px;
  color:#fff;
  display:grid;
  grid-template-columns:1.15fr 1fr;
  gap:36px;
  align-items:center;
  box-shadow:var(--shadow-sm);
}
.subscribe-card::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:18px 18px;
  opacity:.08;
  pointer-events:none;
}
.subscribe-card > *{position:relative;z-index:1;}
.subscribe-card h2{
  font-size:clamp(22px,3vw,30px);
  line-height:1.35;
  font-weight:700;
  margin-bottom:12px;
}
.subscribe-card p{color:#D9EAE5;font-size:15.5px;}
.subscribe-form{display:flex;gap:12px;}
.subscribe-form input{
  flex:1;
  height:46px;
  padding:0 16px;
  border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.35);
  background:rgba(255,255,255,.14);
  color:#fff;
  outline:none;
  transition:border-color var(--ease),background var(--ease);
}
.subscribe-form input::placeholder{color:rgba(255,255,255,.65);}
.subscribe-form input:focus{border-color:#fff;background:rgba(255,255,255,.22);box-shadow:0 0 0 3px rgba(255,255,255,.2);}
.subscribe-form button{
  height:46px;
  padding:0 22px;
  border-radius:var(--r-btn);
  background:var(--accent-500);
  color:#fff;
  font-weight:600;
  transition:background var(--ease),transform var(--ease);
}
.subscribe-form button:hover{background:#F0945F;transform:translateY(-1px);}
.form-note{font-size:13px;color:#CBDFD9;margin-top:12px;}

/* ---------- footer ---------- */
.site-footer{
  background:var(--brand-900);
  color:#C9D6D1;
  padding:72px 0 28px;
  margin-top:0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:44px;
  border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:17px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
}
.footer-brand .brand-mark{background:var(--brand-600);}
.site-footer p{font-size:14px;line-height:1.8;color:#A9BAB4;max-width:36em;}
.site-footer h3{
  font-size:14px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.4px;
}
.footer-links{display:grid;gap:10px;}
.footer-links a{
  font-size:14px;
  color:#A9BAB4;
  transition:color var(--ease);
}
.footer-links a:hover{color:#6FB8A8;}
.footer-bottom{
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:10px;
  padding-top:22px;
  font-size:13px;
  color:#7E918B;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .container{padding:0 20px;}
  .nav-toggle{display:flex;align-items:center;justify-content:center;}
  .nav-links{
    display:none;
    order:5;
    width:100%;
    margin-left:0;
    margin-top:12px;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:10px;
  }
  .nav-links.open{display:grid;}
  .nav-links .nav-chip{width:100%;justify-content:flex-start;height:44px;}
  .nav-links .nav-chip--cta{grid-column:span 2;justify-content:center;}
  .nav-cta{display:none;}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:40px;}
  .article-side{position:static;}
  .article-side .side-card:nth-child(2){order:3;}
  .card-grid-3{grid-template-columns:repeat(2,minmax(0,1fr));}
  .subscribe-card{grid-template-columns:1fr;padding:40px 28px;}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;}
  .related,.subscribe{padding:64px 0;}
  .article-main{padding:36px 0 64px;}
}
@media (max-width:640px){
  body{font-size:16px;}
  .site-header{padding:10px 0;}
  .brand-text strong{font-size:15px;}
  .brand-text span{display:none;}
  .card-grid-3{grid-template-columns:minmax(0,1fr);}
  .article-body{font-size:16px;}
  .article-body h2{margin-top:2em;}
  .subscribe-form{flex-direction:column;}
  .subscribe-form button{width:100%;}
  .footer-grid{grid-template-columns:minmax(0,1fr);}
  .footer-bottom{flex-direction:column;gap:6px;}
  .back-row .btn{width:100%;}
  .section-head{margin-bottom:26px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;}
  html{scroll-behavior:auto;}
}

/* roulang page: category1 */
:root{
  --brand-600:#2E6E63;
  --brand-500:#3F8C7E;
  --brand-700:#1B3B35;
  --brand-900:#0C1E1B;
  --brand-100:#DDEBE6;
  --accent-500:#E8804A;
  --accent-100:#FBE7DC;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EFEBE3;
  --ink:#16211E;
  --ink-2:#5A655F;
  --muted:#9AA39E;
  --line:#E3DED3;
  --danger:#C2483A;
  --r-card:18px;
  --r-nav:20px;
  --r-btn:12px;
  --r-img:14px;
  --r-pill:999px;
  --r-cta:24px;
  --shadow-sm:0 1px 2px rgba(12,30,27,.04),0 12px 32px -12px rgba(12,30,27,.12);
  --shadow-lg:0 18px 40px -16px rgba(12,30,27,.22);
  --dur:180ms;
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.8;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input{font:inherit;color:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:3px solid rgba(46,110,99,.3);outline-offset:2px;border-radius:6px;}

.container{max-width:1200px;margin:0 auto;padding:0 32px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,245,240,.9);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
  padding:12px 0;
}
.nav-panel{
  position:relative;
  display:flex;align-items:center;gap:14px;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-nav);
  padding:10px 12px;
  box-shadow:var(--shadow-sm);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;
  background:var(--brand-600);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-mark svg{width:20px;height:20px;}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-text strong{font-size:15px;font-weight:700;letter-spacing:.2px;}
.brand-text span{font-size:12px;color:var(--ink-2);}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:auto;}
.nav-chip{
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;border-radius:var(--r-btn);
  font-size:14px;color:var(--ink-2);
  border:1px solid transparent;
  transition:background var(--dur) ease,color var(--dur) ease,box-shadow var(--dur) ease;
  white-space:nowrap;
}
.nav-chip i{font-size:13px;color:var(--brand-500);}
.nav-chip:hover{background:var(--surface-2);color:var(--ink);}
.nav-chip.active{
  background:var(--brand-100);
  color:var(--brand-700);
  font-weight:600;
  box-shadow:inset 3px 0 0 var(--brand-600);
}
.nav-chip.active i{color:var(--brand-700);}
.nav-chip--cta{display:none;background:var(--brand-600);color:#fff;font-weight:600;justify-content:center;}
.nav-chip--cta:hover{background:var(--brand-500);color:#fff;}
.nav-toggle{
  display:none;margin-left:auto;
  width:42px;height:42px;border-radius:12px;
  background:var(--surface-2);border:1px solid var(--line);
  cursor:pointer;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:42px;padding:0 20px;border-radius:var(--r-btn);
  font-size:14px;font-weight:600;cursor:pointer;
  border:1.5px solid transparent;
  transition:transform var(--dur) ease,background var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.btn-primary{background:var(--brand-600);color:#fff;}
.btn-primary:hover{background:var(--brand-500);transform:translateY(-1px);box-shadow:var(--shadow-sm);}
.btn-ghost{background:transparent;border-color:var(--brand-600);color:var(--brand-700);}
.btn-ghost:hover{background:var(--brand-100);transform:translateY(-1px);}
.btn-link{background:none;border:0;padding:0;height:auto;color:var(--brand-600);font-weight:600;text-decoration:underline;text-underline-offset:2px;}
.btn-link:hover{color:var(--accent-500);}
.nav-cta{flex:0 0 auto;}

/* ---------- banner ---------- */
.page-banner{
  position:relative;
  color:#fff;
  min-height:300px;
  display:flex;align-items:center;
  background-image:linear-gradient(100deg,rgba(12,30,27,.88) 0%,rgba(46,110,99,.82) 62%,rgba(46,110,99,.72) 100%),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  padding:64px 0 56px;
}
.breadcrumb{margin-bottom:18px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.72);}
.breadcrumb li::after{content:"/";margin-left:8px;color:rgba(255,255,255,.45);}
.breadcrumb li:last-child::after{content:"";}
.breadcrumb a{color:rgba(255,255,255,.82);}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px;}
.breadcrumb [aria-current="page"]{color:#fff;font-weight:600;}
.page-banner h1{font-size:clamp(28px,4.4vw,44px);line-height:1.25;font-weight:700;letter-spacing:.5px;}
.banner-note{margin-top:14px;font-size:16px;line-height:1.9;color:rgba(255,255,255,.86);max-width:44em;}
.banner-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px;}
.banner-tags span{
  display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);
  font-size:13px;color:#fff;
}

/* ---------- sections ---------- */
.section{padding:92px 0;}
.section--tight{padding:64px 0;}
.section--alt{background:var(--surface-2);}
.section-head{max-width:760px;margin-bottom:40px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;color:var(--brand-600);letter-spacing:1.4px;
  margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--accent-500);border-radius:2px;}
.section-head h2{font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;}
.section-head p{margin-top:14px;font-size:16px;color:var(--ink-2);max-width:44em;}

/* ---------- intro + metrics ---------- */
.intro-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;align-items:start;}
.intro-copy{grid-column:span 7;}
.intro-copy p{color:var(--ink-2);font-size:16.5px;}
.intro-copy p + p{margin-top:14px;}
.intro-list{margin-top:22px;display:grid;gap:12px;}
.intro-list li{display:flex;gap:10px;font-size:15px;color:var(--ink);}
.intro-list i{color:var(--brand-600);font-size:14px;margin-top:7px;}
.intro-media{grid-column:span 5;}
.media-frame{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);background:var(--brand-100);
  aspect-ratio:4/3;
}
.media-frame img{width:100%;height:100%;object-fit:cover;}
.media-frame::after{
  content:"";position:absolute;inset:auto -18px -18px auto;width:96px;height:96px;
  background:var(--brand-100);border-radius:24px 0 0 0;opacity:.85;
}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:48px;}
.metric-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--shadow-sm);transition:transform var(--dur) ease,box-shadow var(--dur) ease;
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.metric-num{
  font-size:32px;font-weight:700;color:var(--brand-600);
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.metric-num em{font-style:normal;font-size:16px;color:var(--accent-500);margin-left:4px;}
.metric-card h3{font-size:16px;font-weight:600;margin-top:8px;}
.metric-card p{font-size:14px;color:var(--ink-2);margin-top:6px;}

/* ---------- category layout ---------- */
.cat-layout{display:grid;grid-template-columns:repeat(12,1fr);gap:24px;}
.cat-aside{grid-column:span 3;}
.cat-main{grid-column:span 9;}
.sticky-stack{position:sticky;top:96px;display:grid;gap:16px;}
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:20px;box-shadow:var(--shadow-sm);
}
.side-card h3{font-size:15px;font-weight:700;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3 i{color:var(--brand-600);font-size:13px;}
.filter-list{display:grid;gap:8px;}
.filter-chip{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  width:100%;height:42px;padding:0 14px;border-radius:var(--r-btn);
  background:var(--surface);border:1px solid var(--line);
  font-size:14px;color:var(--ink-2);cursor:pointer;text-align:left;
  transition:background var(--dur) ease,color var(--dur) ease,border-color var(--dur) ease,box-shadow var(--dur) ease;
}
.filter-chip:hover{background:var(--surface-2);color:var(--ink);}
.filter-chip.is-active{
  background:var(--brand-100);border-color:var(--brand-100);
  color:var(--brand-700);font-weight:600;box-shadow:inset 3px 0 0 var(--brand-600);
}
.filter-chip .count{
  font-size:12px;color:var(--ink-2);background:var(--surface-2);
  border-radius:var(--r-pill);padding:1px 8px;font-variant-numeric:tabular-nums;
}
.filter-chip.is-active .count{background:#fff;color:var(--brand-700);}
.side-note{font-size:13.5px;color:var(--ink-2);line-height:1.8;}
.side-card--brand{background:var(--brand-600);border-color:var(--brand-600);color:#fff;}
.side-card--brand h3{color:#fff;}
.side-card--brand h3 i{color:rgba(255,255,255,.8);}
.side-card--brand .side-note{color:rgba(255,255,255,.86);}
.side-card--brand .btn{width:100%;margin-top:16px;background:#fff;color:var(--brand-700);}
.side-card--brand .btn:hover{background:var(--accent-100);color:var(--brand-700);}

.cards-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;display:flex;flex-direction:column;height:100%;
  transition:transform var(--dur) ease,box-shadow var(--dur) ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:var(--brand-100);}
.thumb img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur) ease;}
.card:hover .thumb img{transform:scale(1.03);}
.thumb .badge{position:absolute;left:14px;top:14px;}
.badge{
  display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--brand-100);color:var(--brand-700);font-size:12px;font-weight:600;
}
.badge--light{background:rgba(255,255,255,.9);color:var(--brand-700);}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:20px;font-weight:600;line-height:1.4;transition:color var(--dur) ease;}
.card:hover .card-title{color:var(--brand-600);}
.card-desc{
  font-size:14px;color:var(--ink-2);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-meta{
  margin-top:auto;padding-top:12px;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums;
}
.card-meta .more{color:var(--brand-600);font-weight:600;}
.card.is-hidden{display:none;}
.empty-state{
  display:none;background:var(--brand-100);border-radius:var(--r-card);
  padding:28px;text-align:center;color:var(--brand-700);
}
.empty-state.is-open{display:block;}
.empty-state p{font-size:14.5px;margin-bottom:14px;}

/* ---------- compare table ---------- */
.table-wrap{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--shadow-sm);
}
table{width:100%;border-collapse:collapse;}
thead th{
  background:var(--brand-100);color:var(--brand-700);
  font-size:14px;font-weight:700;text-align:left;
  padding:16px 20px;white-space:nowrap;
}
tbody td{
  padding:16px 20px;font-size:14.5px;color:var(--ink-2);
  border-top:1px solid var(--line);vertical-align:top;
}
tbody td:first-child{color:var(--ink);font-weight:600;}
tbody tr:nth-child(even){background:#FAF8F4;}
tbody tr:hover{background:var(--brand-100);}

/* ---------- steps ---------- */
.steps{position:relative;display:grid;gap:28px;padding-left:34px;}
.steps::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:2px;background:var(--line);}
.step{position:relative;}
.step::before{
  content:"";position:absolute;left:-34px;top:6px;width:24px;height:24px;border-radius:50%;
  background:var(--surface);border:2px solid var(--brand-600);
}
.step-num{
  font-size:13px;font-weight:700;color:var(--accent-500);letter-spacing:1px;
  font-variant-numeric:tabular-nums;
}
.step h3{font-size:19px;font-weight:600;margin:4px 0 8px;}
.step p{font-size:15px;color:var(--ink-2);max-width:44em;}

/* ---------- related ---------- */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.related-card{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;transition:transform var(--dur) ease,box-shadow var(--dur) ease,border-color var(--dur) ease;
}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--brand-100);}
.related-card i{
  width:40px;height:40px;border-radius:12px;background:var(--brand-100);color:var(--brand-700);
  display:grid;place-items:center;flex:0 0 auto;font-size:15px;
}
.related-card h3{font-size:16px;font-weight:600;}
.related-card p{font-size:13.5px;color:var(--ink-2);margin-top:4px;line-height:1.7;}

/* ---------- faq ---------- */
.faq-list{max-width:760px;margin:0 auto;background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--shadow-sm);}
.faq-item + .faq-item{border-top:1px solid var(--line);}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:56px;padding:14px 24px;font-size:16px;font-weight:600;
  transition:background var(--dur) ease,color var(--dur) ease;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{background:var(--surface-2);color:var(--brand-600);}
.faq-icon{position:relative;width:20px;height:20px;flex:0 0 auto;transition:transform var(--dur) ease;}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--brand-600);border-radius:2px;
  transition:transform var(--dur) ease,opacity var(--dur) ease;
}
.faq-icon::before{left:9px;top:2px;width:2px;height:16px;}
.faq-icon::after{left:2px;top:9px;width:16px;height:2px;}
.faq-item[open] .faq-icon{transform:rotate(180deg);}
.faq-item[open] .faq-icon::before{transform:scaleY(0);opacity:0;}
.faq-a{padding:0 24px 20px;font-size:15px;line-height:1.85;color:var(--ink-2);max-width:44em;}

/* ---------- cta ---------- */
.cta-card{
  position:relative;overflow:hidden;
  background:var(--brand-600);color:#fff;border-radius:var(--r-cta);
  padding:52px 48px;
  box-shadow:var(--shadow-lg);
}
.cta-card::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.09) 1px,transparent 1px);
  background-size:18px 18px;opacity:.8;pointer-events:none;
}
.cta-inner{position:relative;display:grid;grid-template-columns:1.15fr 1fr;gap:32px;align-items:center;}
.cta-card h2{font-size:clamp(22px,3vw,30px);line-height:1.3;font-weight:700;color:#fff;}
.cta-card p{margin-top:12px;font-size:15px;color:rgba(255,255,255,.88);max-width:36em;}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap;}
.subscribe-form input{
  flex:1 1 200px;height:46px;padding:0 16px;border-radius:var(--r-btn);
  border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.96);color:var(--ink);
}
.subscribe-form input::placeholder{color:rgba(90,101,95,.7);}
.subscribe-form input:focus{outline:none;border-color:#fff;box-shadow:0 0 0 3px rgba(255,255,255,.28);}
.subscribe-form .btn{background:#fff;color:var(--brand-700);flex:0 0 auto;height:46px;}
.subscribe-form .btn:hover{background:var(--accent-100);color:var(--brand-700);transform:translateY(-1px);}
.form-tip{margin-top:12px;font-size:13px;color:rgba(255,255,255,.8);}
.form-tip.is-ok{display:inline-block;background:rgba(255,255,255,.16);border-radius:var(--r-pill);padding:4px 14px;color:#fff;}

/* ---------- footer ---------- */
.site-footer{background:var(--brand-900);color:#C9D6D1;padding:64px 0 24px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px;}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;border-radius:11px;background:var(--brand-600);}
.site-footer p{font-size:14px;line-height:1.85;color:#C9D6D1;max-width:34em;}
.site-footer h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;}
.footer-links{display:grid;gap:10px;}
.footer-links a{font-size:14px;color:#C9D6D1;transition:color var(--dur) ease;}
.footer-links a:hover{color:#6FB8A8;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding-top:20px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:rgba(201,214,209,.8);font-variant-numeric:tabular-nums;
}

/* ---------- responsive ---------- */
@media (max-width:1023px){
  .container{padding:0 24px;}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center;}
  .nav-cta{display:none;}
  .nav-links{display:none;}
  .nav-links.open{
    display:grid;grid-template-columns:1fr 1fr;gap:10px;
    position:absolute;left:12px;right:12px;top:calc(100% + 8px);
    background:var(--surface);border:1px solid var(--line);border-radius:var(--r-nav);
    padding:14px;box-shadow:var(--shadow-lg);margin-left:0;z-index:70;
  }
  .nav-links.open .nav-chip{height:44px;justify-content:flex-start;border:1px solid var(--line);}
  .nav-links.open .nav-chip--cta{display:inline-flex;grid-column:1/-1;border-color:var(--brand-600);margin-top:4px;}
  .section{padding:68px 0;}
  .intro-copy,.intro-media{grid-column:span 12;}
  .cat-aside,.cat-main{grid-column:span 12;}
  .sticky-stack{position:static;}
  .related-grid{grid-template-columns:1fr 1fr;}
  .cta-inner{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:767px){
  .cards-2{grid-template-columns:1fr;}
  .metrics{grid-template-columns:1fr;}
  .cta-card{padding:36px 24px;}
  .page-banner{padding:44px 0 40px;min-height:auto;}
  .related-grid{grid-template-columns:1fr;}
  thead th,tbody td{padding:13px 14px;font-size:13.5px;}
}
@media (max-width:520px){
  .container{padding:0 20px;}
  .section{padding:56px 0;}
  .brand-text span{display:none;}
  .nav-links.open{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .card-body{padding:16px;}
  .card-title{font-size:18px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important;}
}

/* roulang page: category2 */
:root{
  --brand-600:#2E6E63;
  --brand-500:#3F8C7E;
  --brand-700:#1B3B35;
  --brand-900:#0C1E1B;
  --brand-100:#DDEBE6;
  --accent-500:#E8804A;
  --accent-100:#FBE7DC;
  --paper:#F7F5F0;
  --surface:#FFFFFF;
  --surface-2:#EFEBE3;
  --ink:#16211E;
  --ink-2:#5A655F;
  --ink-3:#9AA39E;
  --line:#E3DED3;
  --danger:#C2483A;
  --font-sans:"HarmonyOS Sans SC","PingFang SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --r-card:18px;
  --r-sm:12px;
  --r-img:14px;
  --r-panel:20px;
  --r-big:24px;
  --shadow-1:0 1px 2px rgba(12,30,27,.04),0 12px 32px -12px rgba(12,30,27,.12);
  --shadow-2:0 18px 40px -16px rgba(12,30,27,.22);
  --ease:180ms ease;
  --sec-pad:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:3px solid rgba(46,110,99,.3);outline-offset:2px;border-radius:8px}
.container{max-width:1200px;margin:0 auto;padding:0 32px}
.num{font-variant-numeric:tabular-nums}

/* ============ HEADER / NAV ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  padding:10px 0;
  background:rgba(247,245,240,.9);
  backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px);
}
.nav-panel{
  position:relative;
  display:flex;align-items:center;gap:14px;
  padding:10px 12px;
  background:rgba(255,255,255,.92);
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  box-shadow:var(--shadow-1);
}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:11px;
  background:var(--brand-600);
  display:grid;place-items:center;flex:0 0 auto;
}
.brand-mark svg{width:19px;height:19px}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:16px;font-weight:700;letter-spacing:.2px}
.brand-text span{font-size:11px;color:var(--ink-2);letter-spacing:.6px}
.nav-links{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-chip{
  position:relative;
  display:inline-flex;align-items:center;gap:8px;
  height:40px;padding:0 14px;
  border-radius:var(--r-sm);
  font-size:14px;font-weight:500;color:var(--ink-2);
  transition:background var(--ease),color var(--ease),transform var(--ease);
  white-space:nowrap;
}
.nav-chip i{font-size:14px;color:var(--ink-3);transition:color var(--ease)}
.nav-chip:hover{background:var(--brand-100);color:var(--brand-700)}
.nav-chip:hover i{color:var(--brand-600)}
.nav-chip.active{background:var(--brand-100);color:var(--brand-600);font-weight:600}
.nav-chip.active i{color:var(--brand-600)}
.nav-chip.active::before{
  content:"";position:absolute;left:5px;top:50%;transform:translateY(-50%);
  width:3px;height:20px;border-radius:2px;background:var(--brand-600);
}
.nav-chip--cta{display:none}
.nav-cta{margin-left:4px;flex:0 0 auto}
.nav-toggle{
  display:none;margin-left:auto;
  width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line);background:var(--surface);
  color:var(--brand-700);font-size:17px;
  align-items:center;justify-content:center;
}

/* ============ BUTTONS ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;
  border-radius:var(--r-sm);
  font-size:15px;font-weight:600;
  transition:transform var(--ease),background var(--ease),box-shadow var(--ease),color var(--ease);
  border:1.5px solid transparent;
  cursor:pointer;
}
.btn-primary{background:var(--brand-600);color:#fff}
.btn-primary:hover{background:var(--brand-500);transform:translateY(-1px);box-shadow:var(--shadow-1)}
.btn-ghost{background:transparent;border-color:var(--brand-600);color:var(--brand-600)}
.btn-ghost:hover{background:var(--brand-100)}
.btn-light{background:#fff;color:var(--brand-700)}
.btn-light:hover{background:var(--accent-100);color:var(--brand-900);transform:translateY(-1px)}
.btn-sm{height:40px;padding:0 16px;font-size:14px}
.btn[disabled]{opacity:.5;cursor:not-allowed}
.link-text{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--brand-600);font-weight:600;font-size:14px;
  border-bottom:2px solid transparent;
  transition:color var(--ease),border-color var(--ease);
}
.link-text:hover{color:var(--accent-500);border-bottom-color:var(--accent-500)}

/* ============ BANNER ============ */
.banner{
  position:relative;
  margin-top:14px;
  border-radius:var(--r-big);
  overflow:hidden;
  background-image:linear-gradient(rgba(46,110,99,.82),rgba(27,59,53,.86)),url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
  min-height:300px;
  display:flex;align-items:center;
}
.banner-inner{padding:54px 48px;max-width:820px}
.crumbs{display:flex;align-items:center;gap:8px;font-size:14px;color:rgba(255,255,255,.78);margin-bottom:18px;flex-wrap:wrap}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:rgba(255,255,255,.5)}
.crumbs a:hover{color:#fff}
.crumbs .current{color:#fff;font-weight:600}
.banner h1{
  font-size:clamp(28px,4.2vw,42px);
  line-height:1.24;font-weight:700;color:#fff;
  letter-spacing:.5px;
}
.banner p{margin-top:14px;font-size:16px;color:rgba(255,255,255,.86);max-width:36em}
.banner-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.banner-tags span{
  display:inline-flex;align-items:center;gap:6px;
  height:28px;padding:0 12px;border-radius:999px;
  font-size:13px;color:#fff;
  background:rgba(255,255,255,.16);
  border:1px solid rgba(255,255,255,.24);
}

/* ============ SECTIONS ============ */
.section{padding:var(--sec-pad) 0}
.section--tight{padding:64px 0}
.section--alt{background:var(--surface-2)}
.section--dark{background:var(--brand-900);color:#E6EFEB}
.section-head{max-width:760px;margin-bottom:40px}
.section-head h2{
  font-size:clamp(22px,3vw,32px);line-height:1.3;font-weight:700;
}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:16px}
.section--dark .section-head p{color:#A8BFB8}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  height:28px;padding:0 12px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-700);
  font-size:13px;font-weight:600;margin-bottom:16px;
}
.section--dark .eyebrow{background:rgba(255,255,255,.1);color:#B7D6CC}

/* ============ 说明段 + 指标 ============ */
.intro-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:start}
.intro-text p{font-size:16.5px;line-height:1.9;color:var(--ink-2);max-width:44em}
.intro-text p+p{margin-top:18px}
.intro-list{margin-top:26px;display:grid;gap:12px}
.intro-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--ink)}
.intro-list i{color:var(--accent-500);margin-top:4px}
.metric-stack{display:grid;gap:16px}
.metric-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 24px;box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease);
}
.metric-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.metric-card .k{font-size:13px;color:var(--ink-2);letter-spacing:.4px}
.metric-card .v{
  font-size:28px;font-weight:700;color:var(--brand-600);
  font-variant-numeric:tabular-nums;margin:6px 0 4px;line-height:1.2;
}
.metric-card .d{font-size:14px;color:var(--ink-2)}

/* ============ TABS ============ */
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.tab{
  height:38px;padding:0 18px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);
  color:var(--ink-2);font-size:14px;font-weight:500;
  transition:all var(--ease);
}
.tab:hover{border-color:var(--brand-500);color:var(--brand-600)}
.tab.active{background:var(--brand-600);border-color:var(--brand-600);color:#fff;font-weight:600}

/* ============ CARDS ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease);
}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.card-media{display:block;aspect-ratio:4/3;overflow:hidden;background:var(--brand-100)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform 320ms ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.badge{
  display:inline-flex;align-items:center;align-self:flex-start;
  height:26px;padding:0 10px;border-radius:999px;
  background:var(--brand-100);color:var(--brand-700);
  font-size:12.5px;font-weight:600;letter-spacing:.2px;
}
.card-title{font-size:17px;font-weight:600;line-height:1.45;transition:color var(--ease)}
.card:hover .card-title{color:var(--brand-600)}
.card-text{font-size:14px;line-height:1.75;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;padding-top:14px;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--ink-3)}
.note-card{
  background:linear-gradient(160deg,var(--brand-100),#EAF4F0);
  border:1px solid #CFE3DC;
  border-radius:var(--r-card);
  padding:26px 24px;
  display:flex;flex-direction:column;justify-content:center;gap:12px;
  transition:transform var(--ease),box-shadow var(--ease);
}
.note-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2)}
.note-card h3{font-size:18px;font-weight:700;line-height:1.45;color:var(--brand-900)}
.note-card p{font-size:14px;line-height:1.8;color:var(--brand-700)}
.note-card .link-text{margin-top:6px}

/* ============ 深色核对要点 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:8px}
.step{
  padding:26px 22px;border-radius:var(--r-card);
  background:rgba(255,255,255,.05);
  border:1px solid rgba(255,255,255,.1);
  transition:transform var(--ease),background var(--ease);
}
.step:hover{transform:translateY(-3px);background:rgba(255,255,255,.09)}
.step .no{
  font-size:13px;font-weight:700;color:var(--accent-500);
  letter-spacing:1px;font-variant-numeric:tabular-nums;
}
.step h3{font-size:17px;font-weight:600;color:#fff;margin:10px 0 8px;line-height:1.4}
.step p{font-size:14px;line-height:1.8;color:#A8BFB8}

/* ============ 相关分类 ============ */
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.related-card{
  display:flex;flex-direction:column;gap:10px;
  padding:26px 24px;border-radius:var(--r-card);
  background:var(--surface);border:1px solid var(--line);
  box-shadow:var(--shadow-1);
  transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--brand-500)}
.related-card .ic{
  width:42px;height:42px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--brand-100);color:var(--brand-600);font-size:17px;
}
.related-card h3{font-size:17px;font-weight:600}
.related-card p{font-size:14px;color:var(--ink-2);line-height:1.75}
.related-card .go{margin-top:auto;padding-top:10px;font-size:13.5px;font-weight:600;color:var(--brand-600);display:flex;align-items:center;gap:6px}

/* ============ FAQ ============ */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);margin-bottom:14px;overflow:hidden;transition:box-shadow var(--ease)}
.faq-item:hover{box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;display:flex;align-items:center;gap:12px;
  min-height:56px;padding:14px 22px;
  text-align:left;font-size:16px;font-weight:600;color:var(--ink);
}
.faq-q .mark{color:var(--brand-600);font-weight:700;font-variant-numeric:tabular-nums}
.faq-q .ico{
  margin-left:auto;color:var(--brand-600);font-size:15px;
  transition:transform var(--ease);
}
.faq-item.open .faq-q .ico{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 240ms ease}
.faq-a p{padding:0 22px 20px 46px;font-size:15px;line-height:1.85;color:var(--ink-2)}

/* ============ CTA ============ */
.cta-section{padding:0 0 var(--sec-pad)}
.cta-card{
  position:relative;overflow:hidden;
  background:var(--brand-600);
  border-radius:var(--r-big);
  padding:56px 56px;
  color:#fff;
  display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;
}
.cta-card::after{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:18px 18px;opacity:.07;pointer-events:none;
}
.cta-card h2{font-size:clamp(22px,2.8vw,30px);line-height:1.32;font-weight:700;position:relative;z-index:1}
.cta-card p{margin-top:14px;font-size:15.5px;color:rgba(255,255,255,.88);position:relative;z-index:1;max-width:34em}
.cta-form{position:relative;z-index:1;display:flex;gap:12px;flex-wrap:wrap}
.cta-form input{
  flex:1 1 240px;height:46px;padding:0 16px;
  border-radius:var(--r-sm);border:1px solid rgba(255,255,255,.4);
  background:rgba(255,255,255,.14);color:#fff;font-size:15px;
  transition:border-color var(--ease),box-shadow var(--ease),background var(--ease);
}
.cta-form input::placeholder{color:rgba(255,255,255,.62)}
.cta-form input:focus{outline:none;border-color:#fff;background:rgba(255,255,255,.22);box-shadow:0 0 0 3px rgba(255,255,255,.22)}
.form-msg{
  margin-top:14px;position:relative;z-index:1;
  display:none;padding:10px 14px;border-radius:var(--r-sm);
  background:rgba(255,255,255,.16);font-size:14px;color:#fff;
}
.form-msg.show{display:block}

/* ============ FOOTER ============ */
.site-footer{background:var(--brand-900);color:#C9D6D1;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;color:#fff;margin-bottom:16px}
.site-footer p{font-size:14px;line-height:1.85;color:#9FB3AC;max-width:32em}
.site-footer h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.4px}
.footer-links{display:grid;gap:10px}
.footer-links a{font-size:14px;color:#C9D6D1;transition:color var(--ease),transform var(--ease);display:inline-block}
.footer-links a:hover{color:#6FB8A8;transform:translateX(3px)}
.footer-bottom{
  margin-top:56px;padding:22px 0;
  border-top:1px solid rgba(255,255,255,.1);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:13px;color:#8BA39B;
}

/* ============ RESPONSIVE ============ */
@media (max-width:1023px){
  :root{--sec-pad:64px}
  .container{padding:0 20px}
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:calc(100% + 10px);left:0;right:0;
    display:none;grid-template-columns:1fr 1fr;gap:8px;
    margin-left:0;padding:12px;
    background:var(--surface);border:1px solid var(--line);
    border-radius:var(--r-card);box-shadow:var(--shadow-2);
  }
  .nav-links.open{display:grid}
  .nav-chip{height:48px;justify-content:flex-start;font-size:14.5px}
  .nav-chip.active::before{left:6px}
  .nav-chip--cta{
    display:inline-flex;grid-column:1 / -1;justify-content:center;
    background:var(--brand-600);color:#fff;font-weight:600;margin-top:4px;
  }
  .nav-chip--cta:hover{background:var(--brand-500);color:#fff}
  .nav-cta{display:none}
  .banner{min-height:240px;border-radius:var(--r-card)}
  .banner-inner{padding:36px 26px}
  .intro-grid{grid-template-columns:1fr;gap:28px}
  .grid-3{grid-template-columns:repeat(2,1fr);gap:20px}
  .steps{grid-template-columns:repeat(2,1fr)}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .cta-card{grid-template-columns:1fr;padding:40px 32px;gap:26px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:639px){
  :root{--sec-pad:56px;--r-card:14px}
  body{font-size:15.5px}
  .brand-text span{display:none}
  .banner h1{font-size:26px}
  .banner p{font-size:15px}
  .grid-3{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .related-grid{grid-template-columns:1fr}
  .cta-card{padding:32px 22px;border-radius:var(--r-card)}
  .cta-form{flex-direction:column}
  .cta-form .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:8px}
  .faq-a p{padding-left:22px}
}
@media (hover:none){
  .card:hover,.metric-card:hover,.related-card:hover,.step:hover,.note-card:hover{transform:none}
}