/* roulang page: index */
/* ============ 设计变量 ============ */
:root{
  --c-primary:#0C3B34;
  --c-primary-600:#0A2E29;
  --c-primary-300:#2E7A6B;
  --c-accent:#F0602A;
  --c-accent-600:#D9501F;
  --c-secondary:#17857A;
  --c-ink:#14201D;
  --c-ink-2:#4A5A56;
  --c-ink-3:#7C8B86;
  --c-line:#DDE5E0;
  --c-bg:#F5F8F5;
  --c-surface:#FFFFFF;
  --c-dark:#08201D;
  --c-accent-soft:#FDEDE5;
  --c-mint:#E6F2EE;
  --r-sm:8px; --r-md:14px; --r-lg:20px; --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,59,52,.06);
  --sh-2:0 8px 24px -8px rgba(12,59,52,.14);
  --sh-3:0 18px 48px -16px rgba(12,59,52,.20);
  --container:1200px;
  --sec-pad:88px;
}
/* ============ reset / base ============ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.85;color:var(--c-ink);background:var(--c-bg);
  font-variant-numeric:tabular-nums;
  padding-bottom:76px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:var(--c-secondary);text-decoration:none;transition:color .22s ease}
a:hover{color:var(--c-accent)}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
::selection{background:var(--c-mint);color:var(--c-primary)}
.container{max-width:var(--container);margin:0 auto;padding:0 20px}
.sec{padding:var(--sec-pad) 0}
.sec--alt{background:var(--c-surface)}
.sec--mint{background:var(--c-mint)}
.sec--dark{background:var(--c-dark);color:#fff}
.sec-head{margin-bottom:40px;max-width:760px}
.sec-head .eyebrow{display:flex;align-items:center;gap:10px;font-size:13px;letter-spacing:.08em;color:var(--c-secondary);margin-bottom:10px}
.eyebrow::before{content:"";width:4px;height:20px;background:var(--c-accent);border-radius:2px}
h1{font-size:clamp(30px,4.2vw,52px);font-weight:800;line-height:1.22;letter-spacing:-.01em;color:var(--c-primary)}
h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.3;color:var(--c-primary)}
h3{font-size:20px;font-weight:700;line-height:1.45;color:var(--c-primary)}
h4{font-size:17px;font-weight:600;line-height:1.5;color:var(--c-primary)}
.sec--dark h2,.sec--dark h3{color:#fff}
p{line-height:1.85}
.lead{font-size:17px;color:var(--c-ink-2);line-height:1.9}
.muted{color:var(--c-ink-3);font-size:14px;line-height:1.7}
.sec-head__row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap}
/* ============ 按钮 ============ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:16px;font-weight:600;line-height:1;padding:0 26px;height:48px;
  border-radius:var(--r-pill);transition:transform .22s ease,box-shadow .22s ease,background-color .22s ease,color .22s ease,border-color .22s ease;
  white-space:nowrap}
.btn:active{transform:scale(.98)}
.btn--primary{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--c-accent-600);color:#fff;box-shadow:var(--sh-2);transform:translateY(-1px)}
.btn--ghost{border:1.5px solid var(--c-primary);color:var(--c-primary);border-radius:var(--r-md);background:transparent}
.btn--ghost:hover{background:var(--c-mint);color:var(--c-primary);transform:translateY(-1px)}
.btn--outline-light{border:1.5px solid rgba(255,255,255,.7);color:#fff;border-radius:var(--r-md);background:transparent}
.btn--outline-light:hover{background:rgba(255,255,255,.12);color:#fff;transform:translateY(-1px)}
.btn--sm{height:36px;padding:0 18px;font-size:14px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--c-accent)}
.link-arrow span{transition:transform .22s ease}
.link-arrow:hover span{transform:translateX(2px)}
.link-more{font-size:14px;font-weight:600;color:var(--c-secondary)}
/* ============ 顶部微条 ============ */
.topbar{background:var(--c-primary-600);color:rgba(255,255,255,.86);font-size:13px;line-height:34px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;gap:16px}
.topbar__links{display:flex;gap:18px}
.topbar a{color:rgba(255,255,255,.86)}
.topbar a:hover{color:#fff}
/* ============ 导航 ============ */
.site-header{position:sticky;top:0;z-index:60;background:var(--c-surface);border-bottom:1px solid var(--c-line);transition:box-shadow .22s ease}
.site-header.is-stuck{box-shadow:var(--sh-1)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px;color:var(--c-primary)}
.logo:hover{color:var(--c-primary)}
.logo-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-300));
  color:#fff;font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center;letter-spacing:-.02em}
.logo-text{display:flex;flex-direction:column;line-height:1.1}
.logo-text strong{font-size:20px;font-weight:700;letter-spacing:-.01em}
.logo-text em{font-style:normal;font-size:13px;color:var(--c-accent);font-weight:600;letter-spacing:.02em}
.nav-menu{display:flex;align-items:center;gap:4px;background:var(--c-bg);border:1px solid var(--c-line);border-radius:var(--r-pill);padding:4px}
.nav-menu a{display:block;padding:8px 16px;font-size:15px;font-weight:600;color:var(--c-ink-2);border-radius:var(--r-pill);transition:background-color .22s ease,color .22s ease}
.nav-menu a:hover{background:var(--c-surface);color:var(--c-primary)}
.nav-menu a.is-active{background:var(--c-mint);color:var(--c-secondary)}
.nav-right{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);align-items:center;justify-content:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-primary)}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
/* 抽屉 */
.drawer{position:fixed;inset:0;z-index:90;visibility:hidden;pointer-events:none}
.drawer__mask{position:absolute;inset:0;background:rgba(8,32,29,.45);opacity:0;transition:opacity .25s ease}
.drawer__panel{position:absolute;top:0;right:0;width:86vw;max-width:380px;height:100%;background:var(--c-surface);
  box-shadow:var(--sh-3);transform:translateX(100%);transition:transform .28s ease;display:flex;flex-direction:column}
.drawer.is-open{visibility:visible;pointer-events:auto}
.drawer.is-open .drawer__mask{opacity:1}
.drawer.is-open .drawer__panel{transform:translateX(0)}
.drawer__head{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--c-line)}
.drawer__close{width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);font-size:20px;color:var(--c-ink-2);line-height:1}
.drawer__nav{padding:8px 0;flex:1;overflow-y:auto}
.drawer__nav a{display:flex;align-items:center;height:52px;padding:0 20px;font-size:16px;font-weight:600;color:var(--c-ink);border-bottom:1px solid var(--c-line)}
.drawer__nav a.is-active{color:var(--c-secondary);background:var(--c-mint)}
.drawer__foot{padding:16px 20px 24px;border-top:1px solid var(--c-line)}
.drawer__foot .btn{width:100%}
.drawer__foot p{margin-top:12px;font-size:13px;color:var(--c-ink-3);line-height:1.7}
/* ============ Hero ============ */
.hero{position:relative;background:var(--c-bg);overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;
  background:linear-gradient(120deg,rgba(12,59,52,.05),rgba(23,133,122,.03) 55%,rgba(255,255,255,0) 85%);pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.035;
  background-image:linear-gradient(var(--c-primary) 1px,transparent 1px),linear-gradient(90deg,var(--c-primary) 1px,transparent 1px);
  background-size:44px 44px}
.hero__inner{position:relative;z-index:1;display:grid;grid-template-columns:6fr 5fr;gap:48px;align-items:center;min-height:560px;padding:72px 0}
.hero__copy h1{margin-bottom:18px}
.hero__sub{font-size:17px;color:var(--c-ink-2);max-width:520px;margin-bottom:28px}
.hero__actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:36px}
.hero__stats{display:flex;gap:0;flex-wrap:wrap;border-top:1px solid var(--c-line);padding-top:22px}
.hero__stats div{padding-right:28px;margin-right:28px;border-right:1px solid var(--c-line)}
.hero__stats div:last-child{border-right:0;margin-right:0;padding-right:0}
.hero__stats b{display:block;font-size:28px;font-weight:700;color:var(--c-primary);line-height:1.25}
.hero__stats span{font-size:13px;color:var(--c-ink-3)}
.hero__media{position:relative}
.hero__media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-lg);border:1px solid var(--c-line);box-shadow:var(--sh-2)}
.hero__tag{position:absolute;left:18px;bottom:18px;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-pill);padding:8px 16px;font-size:13px;font-weight:600;color:var(--c-primary);box-shadow:var(--sh-1)}
/* ============ 流程横条 ============ */
.flow{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-lg);padding:32px;box-shadow:var(--sh-1)}
.flow__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;position:relative}
.flow__item{display:flex;gap:16px;align-items:flex-start;position:relative;padding-right:24px}
.flow__item::after{content:"";position:absolute;right:0;top:16px;width:calc(100% - 32px);border-top:1px dashed var(--c-line);transform:translateX(48px)}
.flow__item:last-child::after{display:none}
.flow__num{flex:0 0 32px;width:32px;height:32px;border-radius:50%;background:var(--c-primary);color:#fff;
  font-size:14px;font-weight:700;display:flex;align-items:center;justify-content:center}
.flow__body h3{font-size:17px;margin-bottom:4px}
.flow__body p{font-size:14px;color:var(--c-ink-2);line-height:1.75}
/* ============ 卖点区 ============ */
.feature-grid{display:grid;grid-template-columns:7fr 5fr;gap:24px;align-items:stretch}
.card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-1px);border-color:var(--c-secondary)}
.card:hover h3,.card:hover h4{color:var(--c-primary)}
.feature-main{padding:32px;display:flex;flex-direction:column;gap:18px}
.icon-box{width:44px;height:44px;border-radius:12px;background:var(--c-mint);display:flex;align-items:center;justify-content:center;
  color:var(--c-secondary);font-size:20px;font-weight:800}
.feature-main img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:12px;margin-top:auto}
.feature-side{display:grid;gap:24px}
.mini-card{padding:24px;display:flex;gap:16px;align-items:flex-start}
.mini-card .icon-box{flex:0 0 40px;width:40px;height:40px;font-size:18px}
.mini-card p{font-size:14px;color:var(--c-ink-2);margin-top:6px;line-height:1.75}
/* ============ 场景演示 ============ */
.scene{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.scene + .scene{margin-top:72px}
.scene--reverse .scene__media{order:2}
.scene__body h3{margin-bottom:14px}
.scene__body p{color:var(--c-ink-2);margin-bottom:14px}
.browser{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);box-shadow:var(--sh-2);overflow:hidden}
.browser__bar{height:28px;background:#EDF2EF;display:flex;align-items:center;gap:6px;padding:0 12px}
.browser__bar i{width:9px;height:9px;border-radius:50%;background:#C6D2CD;display:block}
.browser__bar i:first-child{background:#E8B4A0}
.browser img{width:100%;aspect-ratio:16/10;object-fit:cover}
/* ============ 最新信息 ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{display:flex;flex-direction:column;background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;
  overflow:hidden;box-shadow:var(--sh-1);transition:box-shadow .22s ease,transform .22s ease,border-color .22s ease;color:inherit}
.post-card:hover{box-shadow:var(--sh-2);transform:translateY(-1px);border-color:var(--c-secondary);color:inherit}
.post-card__thumb{aspect-ratio:16/9;background:linear-gradient(135deg,var(--c-primary),var(--c-primary-300));overflow:hidden}
.post-card__thumb img{width:100%;height:100%;object-fit:cover}
.post-card__body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-badge{align-self:flex-start;background:var(--c-mint);color:var(--c-secondary);font-size:12px;font-weight:600;
  border-radius:6px;padding:4px 10px}
.post-title{font-size:17px;font-weight:700;line-height:1.5;color:var(--c-primary);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-excerpt{font-size:14px;color:var(--c-ink-2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:auto;
  padding-top:12px;border-top:1px solid var(--c-line);font-size:14px;color:var(--c-ink-3)}
.post-meta .more{font-size:14px;font-weight:600;color:var(--c-accent)}
.post-grid .post-card:first-child{grid-column:span 2}
.post-grid .post-card:first-child .post-card__body{padding:26px}
.post-grid .post-card:first-child .post-title{font-size:20px;-webkit-line-clamp:2}
.post-empty{border:1px dashed var(--c-line);border-radius:var(--r-md);padding:48px 24px;text-align:center;background:var(--c-surface)}
.post-empty .ico{font-size:40px;line-height:1;color:var(--c-primary-300)}
.post-empty p{margin:12px 0 18px;color:var(--c-ink-3);font-size:15px}
/* ============ 社会认同 ============ */
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:48px}
.metric{background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;padding:24px;box-shadow:var(--sh-1)}
.metric b{display:block;font-size:32px;font-weight:800;color:var(--c-accent);line-height:1.2}
.metric span{font-size:14px;color:var(--c-ink-2)}
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.quote{background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;padding:24px;box-shadow:var(--sh-1);position:relative}
.quote__star{position:absolute;top:20px;right:22px;color:var(--c-accent);font-size:13px;letter-spacing:2px}
.quote__head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:44px;height:44px;border-radius:50%;background:var(--c-mint);color:var(--c-primary);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px}
.quote__head strong{display:block;font-size:15px;color:var(--c-primary)}
.quote__head em{font-style:normal;font-size:13px;color:var(--c-ink-3)}
.quote p{font-size:14.5px;color:var(--c-ink-2);line-height:1.85}
/* ============ FAQ ============ */
.faq{max-width:860px;margin:0 auto}
.faq__item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-md);margin-bottom:10px;overflow:hidden;transition:box-shadow .22s ease}
.faq__item:hover{box-shadow:var(--sh-1)}
.faq__q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;
  padding:20px 22px;font-size:17px;font-weight:600;color:var(--c-primary)}
.faq__icon{flex:0 0 24px;width:24px;height:24px;position:relative;transition:transform .25s ease}
.faq__icon::before,.faq__icon::after{content:"";position:absolute;background:var(--c-accent);border-radius:2px}
.faq__icon::before{left:3px;top:11px;width:18px;height:2px}
.faq__icon::after{left:11px;top:3px;width:2px;height:18px}
.faq__item.is-open .faq__icon{transform:rotate(45deg)}
.faq__a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq__a p{padding:0 22px 22px;font-size:15px;line-height:1.8;color:var(--c-ink-2);border-top:1px solid var(--c-line);padding-top:16px;margin-top:0}
/* ============ CTA 带 ============ */
.cta-band{position:relative;background:var(--c-dark);color:#fff;text-align:center;overflow:hidden}
.cta-band::before{content:"";position:absolute;left:50%;top:50%;width:900px;height:900px;transform:translate(-50%,-50%);
  border-radius:50%;border:1px solid rgba(255,255,255,.06);box-shadow:0 0 0 120px rgba(255,255,255,.03);pointer-events:none}
.cta-band .container{position:relative;z-index:1;padding-top:80px;padding-bottom:80px}
.cta-band p{color:rgba(255,255,255,.78);margin:14px auto 28px;max-width:560px}
.cta-band .btn-row{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
/* ============ 页脚 ============ */
.site-footer{background:var(--c-dark);color:rgba(255,255,255,.72)}
.site-footer .container{padding-top:72px;padding-bottom:32px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.footer-brand .logo-text strong{color:#fff}
.footer-brand p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);margin-top:16px;max-width:320px}
.site-footer h4{color:#fff;font-size:15px;font-weight:600;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:rgba(255,255,255,.68)}
.footer-links a:hover{color:var(--c-accent)}
.footer-contact p{font-size:14px;color:rgba(255,255,255,.68);margin-bottom:10px}
.footer-bottom{margin-top:48px;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:rgba(255,255,255,.5)}
/* ============ 底部转化条 ============ */
.sticky-bar{position:fixed;left:0;right:0;bottom:0;z-index:70;height:64px;background:var(--c-surface);
  border-top:1px solid var(--c-line);box-shadow:0 -8px 24px -12px rgba(12,59,52,.18);
  transform:translateY(120%);transition:transform .3s ease}
.sticky-bar.is-visible{transform:translateY(0)}
.sticky-bar__inner{max-width:var(--container);margin:0 auto;padding:0 20px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:16px}
.sticky-bar__text{font-size:14px;color:var(--c-ink-2)}
.sticky-bar__actions{display:flex;align-items:center;gap:16px}
.to-top{position:fixed;right:24px;bottom:88px;width:44px;height:44px;border-radius:50%;background:var(--c-surface);
  border:1px solid var(--c-line);box-shadow:var(--sh-2);color:var(--c-primary);font-size:18px;display:flex;
  align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:opacity .25s ease,transform .25s ease;z-index:65}
.to-top.is-visible{opacity:1;visibility:visible}
.to-top:hover{transform:translateY(-2px)}
/* ============ 进入动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}
/* ============ 响应式 ============ */
@media (max-width:1023px){
  :root{--sec-pad:64px}
  .nav-menu,.nav-right .btn--ghost{display:none}
  .nav-toggle{display:flex}
  .hero__inner{grid-template-columns:1fr;gap:36px;min-height:auto;padding:48px 0 56px}
  .hero__media{order:2}
  .feature-grid{grid-template-columns:1fr}
  .scene{grid-template-columns:1fr;gap:28px}
  .scene--reverse .scene__media{order:0}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .post-grid .post-card:first-child{grid-column:span 2}
  .metrics{grid-template-columns:repeat(2,1fr)}
  .quotes{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .topbar__links{display:none}
  .nav{height:62px}
  .logo-mark{width:34px;height:34px;font-size:16px}
  .logo-text strong{font-size:18px}
  .flow{padding:24px 20px}
  .flow__grid{grid-template-columns:1fr;gap:0}
  .flow__item{padding:0 0 22px 0}
  .flow__item::after{display:block;left:15px;top:40px;width:0;height:calc(100% - 44px);border-top:0;border-left:1px dashed var(--c-line);transform:none}
  .flow__item:last-child{padding-bottom:0}
  .flow__item:last-child::after{display:none}
  .hero__actions .btn{width:100%}
  .hero__stats div{padding-right:20px;margin-right:20px}
  .hero__stats b{font-size:24px}
  .post-grid{grid-template-columns:1fr}
  .post-grid .post-card:first-child{grid-column:span 1}
  .feature-main{padding:24px}
  .mini-card{padding:20px}
  .metrics{grid-template-columns:1fr;gap:16px;margin-bottom:32px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .site-footer .container{padding-top:48px}
  .cta-band .container{padding-top:56px;padding-bottom:56px}
  .sticky-bar{height:60px}
  .sticky-bar__text{display:none}
  .sticky-bar__inner{justify-content:center}
  .sticky-bar__actions{width:100%;justify-content:space-between}
  .to-top{bottom:76px;right:16px}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .hero__stats{gap:12px 0}
  .hero__stats div{width:50%;padding-right:0;margin-right:0;border-right:0}
}

/* roulang page: article */
:root{
  --c-primary:#0C3B34;--c-primary-600:#0A2E29;--c-primary-300:#2E7A6B;
  --c-accent:#F0602A;--c-accent-600:#D9501F;--c-secondary:#17857A;
  --c-ink:#14201D;--c-ink-2:#4A5A56;--c-ink-3:#7C8B86;
  --c-line:#DDE5E0;--c-bg:#F5F8F5;--c-surface:#FFFFFF;--c-dark:#08201D;
  --c-accent-soft:#FDEDE5;--c-mint:#E6F2EE;
  --r-sm:8px;--r-md:14px;--r-lg:20px;--r-pill:999px;
  --sh-1:0 1px 2px rgba(12,59,52,.06);
  --sh-2:0 8px 24px -8px rgba(12,59,52,.14);
  --sh-3:0 18px 48px -16px rgba(12,59,52,.20);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;padding-bottom:76px;background:var(--c-bg);color:var(--c-ink);
  font-family:-apple-system,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;line-height:1.85;font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
body.nav-open{overflow:hidden;}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;transition:color .22s ease,background-color .22s ease,border-color .22s ease,box-shadow .22s ease,transform .22s ease;}
button{font-family:inherit;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
a:focus-visible,button:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px;}
.container{max-width:1200px;margin:0 auto;padding:0 20px;}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;font-size:15px;font-weight:600;line-height:1;
  border:1.5px solid transparent;border-radius:var(--r-md);cursor:pointer;
  white-space:nowrap;
}
.btn--primary{background:var(--c-accent);color:#fff;border-radius:var(--r-pill);}
.btn--primary:hover{background:var(--c-accent-600);transform:translateY(-1px);box-shadow:var(--sh-2);}
.btn--primary:active{transform:scale(.98);}
.btn--ghost{background:transparent;border-color:var(--c-primary);color:var(--c-primary);}
.btn--ghost:hover{background:var(--c-mint);border-color:var(--c-secondary);color:var(--c-primary-600);transform:translateY(-1px);}
.btn--ghost:active{transform:scale(.98);}
.btn--light{background:transparent;border-color:rgba(255,255,255,.55);color:#fff;}
.btn--light:hover{background:rgba(255,255,255,.12);border-color:#fff;transform:translateY(-1px);}
.btn--sm{height:38px;padding:0 16px;font-size:14px;}

/* ---------- header & nav ---------- */
.site-header{
  position:sticky;top:0;z-index:50;background:var(--c-surface);
  border-bottom:1px solid var(--c-line);transition:box-shadow .25s ease;
}
.site-header.is-scrolled{box-shadow:var(--sh-1);}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px;}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.logo-mark{
  width:38px;height:38px;border-radius:11px;background:var(--c-primary);color:#fff;
  display:grid;place-items:center;font-weight:800;font-size:19px;letter-spacing:0;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15;}
.logo-text strong{font-size:20px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em;}
.logo-text em{font-style:normal;font-size:13px;color:var(--c-accent);}
.nav-menu{display:flex;align-items:center;gap:6px;}
.nav-menu a{
  padding:8px 15px;border-radius:var(--r-pill);font-size:15px;color:var(--c-ink-2);
}
.nav-menu a:hover{background:var(--c-mint);color:var(--c-secondary);}
.nav-menu a.is-active{background:var(--c-mint);color:var(--c-secondary);font-weight:600;}
.nav-right{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--c-line);border-radius:12px;
  background:var(--c-surface);cursor:pointer;position:relative;padding:0;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:20px;height:2px;border-radius:2px;background:var(--c-primary);
  transform:translateX(-50%);transition:transform .25s ease,opacity .25s ease;
}
.nav-toggle span{top:50%;margin-top:-1px;}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none;}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none;}
.nav-toggle[aria-expanded="true"] span{background:transparent;}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg);}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg);}
.nav-backdrop{
  position:fixed;inset:0;background:rgba(8,32,29,.45);opacity:0;pointer-events:none;
  transition:opacity .25s ease;z-index:55;
}
.nav-backdrop.is-open{opacity:1;pointer-events:auto;}

/* ---------- article head ---------- */
.article-head{
  background:linear-gradient(180deg,#FFFFFF 0%,var(--c-bg) 100%);
  border-bottom:1px solid var(--c-line);padding:26px 0 40px;
}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--c-ink-3);}
.breadcrumb a{color:var(--c-ink-2);}
.breadcrumb a:hover{color:var(--c-accent);}
.breadcrumb .sep{color:#C3CEC9;}
.breadcrumb .current{color:var(--c-ink-3);}
.title-bar{display:block;width:40px;height:4px;border-radius:2px;background:var(--c-accent);margin:22px 0 18px;}
.article-title{
  font-size:clamp(26px,3.4vw,40px);font-weight:700;line-height:1.32;letter-spacing:-.01em;
  color:var(--c-ink);max-width:920px;
}
.meta-row{
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:18px;
  font-size:14px;color:var(--c-ink-3);
}
.meta-row .dot{width:4px;height:4px;border-radius:50%;background:#C3CEC9;}
.badge{
  display:inline-block;font-size:12px;padding:4px 10px;border-radius:6px;
  background:var(--c-mint);color:var(--c-secondary);font-weight:600;
}
.cover-wrap{
  margin-top:30px;border-radius:16px;overflow:hidden;border:1px solid var(--c-line);
  box-shadow:var(--sh-2);aspect-ratio:16/9;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-secondary) 100%);
}
.cover-wrap img{width:100%;height:100%;object-fit:cover;}

/* ---------- layout ---------- */
.article-layout{
  display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:48px;
  align-items:start;padding:56px 0 24px;
}
.article-body{max-width:760px;margin:0 auto;width:100%;min-width:0;}

/* ---------- article content ---------- */
.article-content{font-size:17px;line-height:1.9;color:var(--c-ink-2);}
.article-content p{margin:0 0 1.1em;}
.article-content h2{
  position:relative;font-size:clamp(21px,2.2vw,26px);font-weight:700;line-height:1.4;
  color:var(--c-ink);margin:38px 0 14px;padding-left:17px;
}
.article-content h2::before{
  content:"";position:absolute;left:0;top:.36em;width:4px;height:20px;
  border-radius:2px;background:var(--c-accent);
}
.article-content h3{font-size:19px;font-weight:700;color:var(--c-ink);margin:26px 0 10px;}
.article-content h4{font-size:17px;font-weight:600;color:var(--c-ink);margin:20px 0 8px;}
.article-content blockquote{
  margin:22px 0;padding:18px 20px;border-left:3px solid var(--c-accent);
  background:var(--c-accent-soft);border-radius:0 12px 12px 0;color:var(--c-ink-2);font-style:normal;
}
.article-content ul,.article-content ol{margin:0 0 1.2em;padding-left:1.5em;}
.article-content ul{list-style:disc;}
.article-content ol{list-style:decimal;}
.article-content li{margin-bottom:.5em;line-height:1.85;}
.article-content ul li::marker{color:var(--c-secondary);}
.article-content ol li::marker{color:var(--c-secondary);font-weight:700;}
.article-content img{border-radius:12px;margin:22px auto;}
.article-content figure{margin:22px 0;}
.article-content figcaption{font-size:13px;color:var(--c-ink-3);text-align:center;margin-top:10px;}
.article-content table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px;}
.article-content th,.article-content td{border:1px solid var(--c-line);padding:10px 14px;text-align:left;}
.article-content th{background:var(--c-mint);color:var(--c-primary);font-weight:600;}
.article-content a{color:var(--c-secondary);text-decoration:underline;text-underline-offset:3px;}
.article-content a:hover{color:var(--c-accent);}
.article-content hr{border:none;border-top:1px solid var(--c-line);margin:32px 0;}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px;}
.tag-row .tag{
  font-size:13px;padding:5px 12px;border-radius:var(--r-pill);
  background:var(--c-mint);color:var(--c-secondary);
}
.tag-row .tag:hover{background:var(--c-accent-soft);color:var(--c-accent-600);}
.back-link{
  display:inline-flex;align-items:center;gap:8px;margin-top:26px;
  font-size:15px;font-weight:600;color:var(--c-secondary);
}
.back-link .arrow{transition:transform .22s ease;}
.back-link:hover{color:var(--c-accent);}
.back-link:hover .arrow{transform:translateX(-3px);}

.notfound{
  border:1px dashed var(--c-line);border-radius:14px;background:var(--c-surface);
  padding:56px 24px;text-align:center;
}
.notfound .icon{
  width:52px;height:52px;margin:0 auto 16px;border-radius:14px;background:var(--c-mint);
  display:grid;place-items:center;color:var(--c-secondary);font-size:24px;font-weight:700;
}
.notfound h2{font-size:22px;color:var(--c-ink);margin-bottom:8px;}
.notfound p{font-size:15px;color:var(--c-ink-3);margin-bottom:22px;}

/* ---------- aside ---------- */
.aside-sticky{position:sticky;top:92px;}
.aside-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;
  box-shadow:var(--sh-1);padding:22px;margin-bottom:20px;
}
.aside-card h3{
  display:flex;align-items:center;gap:9px;font-size:16px;font-weight:700;
  color:var(--c-ink);margin-bottom:14px;
}
.aside-card h3::before{
  content:"";width:4px;height:16px;border-radius:2px;background:var(--c-accent);
}
.toc-list a{
  display:block;font-size:14px;line-height:1.55;color:var(--c-ink-2);
  padding:7px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
}
.toc-list a:hover{background:var(--c-mint);color:var(--c-secondary);}
.toc-list a.is-current{
  background:var(--c-mint);color:var(--c-primary);font-weight:600;
  border-left-color:var(--c-accent);
}
.toc-list a.lvl-3{padding-left:22px;font-size:13.5px;color:var(--c-ink-3);}
.hot-list li{border-bottom:1px solid var(--c-line);}
.hot-list li:last-child{border-bottom:none;}
.hot-list a{
  display:flex;gap:10px;padding:11px 0;font-size:14px;line-height:1.6;color:var(--c-ink-2);
}
.hot-list a .num{
  flex:0 0 20px;height:20px;margin-top:1px;border-radius:6px;background:var(--c-mint);
  color:var(--c-secondary);font-size:12px;font-weight:700;display:grid;place-items:center;
}
.hot-list a:hover{color:var(--c-primary);}
.hot-list a:hover .num{background:var(--c-accent);color:#fff;}
.aside-note{font-size:13px;color:var(--c-ink-3);line-height:1.75;}

/* ---------- related ---------- */
.related{padding:32px 0 76px;}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:24px;
}
.section-head h2{
  position:relative;font-size:clamp(22px,2.4vw,30px);font-weight:700;color:var(--c-ink);
  padding-left:17px;line-height:1.35;
}
.section-head h2::before{
  content:"";position:absolute;left:0;top:.4em;width:4px;height:20px;
  border-radius:2px;background:var(--c-accent);
}
.section-head .more{font-size:14px;font-weight:600;color:var(--c-secondary);}
.section-head .more:hover{color:var(--c-accent);}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;}
.card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:16px;
  box-shadow:var(--sh-1);overflow:hidden;display:flex;flex-direction:column;
}
.card:hover{box-shadow:var(--sh-2);transform:translateY(-1px);border-color:var(--c-secondary);}
.card-thumb{
  aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(135deg,var(--c-primary) 0%,var(--c-secondary) 100%);
}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s ease;}
.card:hover .card-thumb img{transform:scale(1.03);}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{
  font-size:17px;font-weight:600;line-height:1.5;color:var(--c-ink);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card:hover .card-title{color:var(--c-primary);}
.card-text{
  font-size:14px;line-height:1.7;color:var(--c-ink-3);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  margin-top:auto;display:flex;align-items:center;justify-content:space-between;
  font-size:13px;color:var(--c-ink-3);
}
.card-foot .arrow{color:var(--c-secondary);font-weight:700;transition:transform .22s ease;}
.card:hover .card-foot .arrow{transform:translateX(3px);}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;background:var(--c-dark);color:#fff;padding:80px 0;text-align:center;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;top:50%;left:50%;width:760px;height:760px;transform:translate(-50%,-50%);
  border-radius:50%;border:1px solid rgba(255,255,255,.06);pointer-events:none;
}
.cta-band::after{
  content:"";position:absolute;top:50%;left:50%;width:520px;height:520px;transform:translate(-50%,-50%);
  border-radius:50%;border:1px solid rgba(255,255,255,.05);pointer-events:none;
}
.cta-band .inner{position:relative;z-index:1;}
.cta-band h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.35;}
.cta-band p{margin-top:12px;font-size:16px;color:rgba(255,255,255,.72);}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px;}

/* ---------- footer ---------- */
.site-footer{background:var(--c-dark);color:#fff;padding:72px 0 32px;}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:32px;}
.footer-brand .logo-mark{background:var(--c-accent);}
.footer-brand .logo-text strong{color:#fff;}
.footer-brand .logo-text em{color:var(--c-accent);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:330px;}
.site-footer h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px;}
.footer-links li{margin-bottom:10px;}
.footer-links a{font-size:14px;color:rgba(255,255,255,.7);}
.footer-links a:hover{color:var(--c-accent);}
.footer-contact p{font-size:14px;color:rgba(255,255,255,.7);margin-bottom:10px;}
.footer-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- bottom bar & to top ---------- */
.bottom-bar{
  position:fixed;left:0;right:0;bottom:0;height:64px;background:var(--c-surface);
  border-top:1px solid var(--c-line);box-shadow:0 -10px 28px -18px rgba(12,59,52,.4);
  z-index:45;opacity:0;transform:translateY(110%);
  transition:transform .3s ease,opacity .3s ease;
}
.bottom-bar.is-visible{opacity:1;transform:none;}
.bottom-bar .inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:100%;}
.bottom-bar .tip{font-size:14px;color:var(--c-ink-2);}
.bottom-bar .acts{display:flex;align-items:center;gap:14px;}
.bottom-bar .link{font-size:14px;font-weight:600;color:var(--c-secondary);}
.bottom-bar .link:hover{color:var(--c-accent);}
.to-top{
  position:fixed;right:24px;bottom:96px;width:44px;height:44px;border-radius:50%;
  background:var(--c-surface);border:1px solid var(--c-line);box-shadow:var(--sh-2);
  display:grid;place-items:center;color:var(--c-primary);cursor:pointer;
  opacity:0;pointer-events:none;transition:opacity .25s ease,transform .25s ease;z-index:44;
}
.to-top.is-visible{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-2px);box-shadow:var(--sh-3);}

/* ---------- responsive ---------- */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 280px;gap:36px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px;}
  .footer-contact{grid-column:1 / -1;}
}
@media (max-width:1023px){
  .nav-toggle{display:block;}
  .nav-menu{
    position:fixed;top:0;right:0;width:86vw;max-width:380px;height:100dvh;
    background:var(--c-surface);flex-direction:column;align-items:stretch;gap:0;
    padding:88px 20px 28px;transform:translateX(101%);transition:transform .28s ease;
    box-shadow:var(--sh-3);z-index:60;overflow-y:auto;
  }
  .nav-menu.is-open{transform:none;}
  .nav-menu a{
    height:52px;display:flex;align-items:center;padding:0 4px;border-radius:0;
    border-bottom:1px solid var(--c-line);font-size:16px;
  }
  .nav-menu a.is-active{background:transparent;color:var(--c-secondary);}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:36px;padding-top:44px;}
  .aside-sticky{position:static;}
  .article-body{max-width:100%;}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .nav-right .btn--ghost{display:none;}
  .article-head{padding:20px 0 30px;}
  .article-layout{padding:34px 0 16px;gap:28px;}
  .article-content{font-size:16px;line-height:1.9;}
  .article-content h2{margin-top:30px;}
  .article-content table{display:block;overflow-x:auto;white-space:nowrap;}
  .related{padding:20px 0 56px;}
  .related-grid{grid-template-columns:minmax(0,1fr);gap:18px;}
  .cta-band{padding:56px 0;}
  .cta-band .btn{width:100%;}
  .cta-actions{flex-direction:column;}
  .site-footer{padding:48px 0 26px;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .bottom-bar{height:60px;opacity:1;transform:none;}
  .bottom-bar .tip{display:none;}
  .bottom-bar .inner{justify-content:center;}
  .bottom-bar .acts{width:100%;justify-content:space-between;gap:10px;}
  .bottom-bar .btn{flex:1;}
  .to-top{bottom:78px;right:16px;}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;}
}

/* roulang page: category1 */
:root{
  --c-primary:#0C3B34;
  --c-primary-600:#0A2E29;
  --c-primary-300:#2E7A6B;
  --c-accent:#F0602A;
  --c-accent-600:#D9501F;
  --c-secondary:#17857A;
  --c-ink:#14201D;
  --c-ink-2:#4A5A56;
  --c-ink-3:#7C8B86;
  --c-line:#DDE5E0;
  --c-bg:#F5F8F5;
  --c-surface:#FFFFFF;
  --c-dark:#08201D;
  --c-accent-soft:#FDEDE5;
  --c-mint:#E6F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,59,52,.06);
  --sh-2:0 8px 24px -8px rgba(12,59,52,.14);
  --sh-3:0 18px 48px -16px rgba(12,59,52,.20);
  --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","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  padding-bottom:76px;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none;transition:color .22s ease,background-color .22s ease}
button{font-family:inherit}
h1,h2,h3,h4{margin:0;line-height:1.3;color:var(--c-ink)}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible{
  outline:2px solid var(--c-accent);
  outline-offset:2px;
  border-radius:4px;
}
.container{
  width:100%;
  max-width:var(--container);
  margin:0 auto;
  padding:0 20px;
}

/* ---------- 顶部信息微条 ---------- */
.topbar{
  background:var(--c-primary-600);
  color:rgba(255,255,255,.88);
  font-size:13px;
  line-height:1.6;
}
.topbar .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:34px;
  padding-top:4px;
  padding-bottom:4px;
}
.topbar a{color:rgba(255,255,255,.88)}
.topbar a:hover{color:var(--c-accent)}
.topbar-right{display:flex;align-items:center;gap:18px}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;
  top:0;
  z-index:50;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.is-stuck{box-shadow:var(--sh-1)}
.nav{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  height:68px;
}
.logo{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
}
.logo-mark{
  width:38px;
  height:38px;
  border-radius:11px;
  background:linear-gradient(140deg,var(--c-primary) 0%,var(--c-primary-300) 100%);
  color:#fff;
  font-weight:800;
  font-size:18px;
  display:grid;
  place-items:center;
  letter-spacing:.02em;
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text strong{font-size:20px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em}
.logo-text em{font-style:normal;font-size:13px;color:var(--c-accent);letter-spacing:.02em}
.nav-menu{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:6px;
  flex:1 1 auto;
}
.nav-menu a{
  padding:9px 16px;
  border-radius:var(--r-pill);
  font-size:15px;
  color:var(--c-ink-2);
  white-space:nowrap;
}
.nav-menu a:hover{background:var(--c-mint);color:var(--c-secondary)}
.nav-menu a.is-active{
  background:var(--c-mint);
  color:var(--c-secondary);
  font-weight:600;
}
.nav-right{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  background:var(--c-surface);
  cursor:pointer;
  position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;
  left:50%;
  width:18px;
  height:2px;
  background:var(--c-primary);
  border-radius:2px;
  transform:translateX(-50%);
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  height:48px;
  padding:0 26px;
  border-radius:var(--r-pill);
  border:1.5px solid transparent;
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  background:transparent;
  color:var(--c-ink);
  transition:background-color .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.btn--primary{background:var(--c-accent);color:#fff;box-shadow:var(--sh-1)}
.btn--primary:hover{background:var(--c-accent-600);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--primary:active{transform:scale(.98)}
.btn--ghost{border-color:var(--c-primary);color:var(--c-primary);border-radius:var(--r-md)}
.btn--ghost:hover{background:var(--c-mint);transform:translateY(-1px);box-shadow:var(--sh-1)}
.btn--ghost:active{transform:scale(.98)}
.btn--light{border-color:rgba(255,255,255,.55);color:#fff;border-radius:var(--r-md)}
.btn--light:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px}
.link-arrow{
  display:inline-flex;
  align-items:center;
  gap:6px;
  color:var(--c-secondary);
  font-size:14px;
  font-weight:600;
}
.link-arrow span{transition:transform .22s ease}
.link-arrow:hover{color:var(--c-accent)}
.link-arrow:hover span{transform:translateX(3px)}

/* ---------- 分类页首屏 ---------- */
.page-hero{
  position:relative;
  overflow:hidden;
  background:linear-gradient(180deg,#EDF5F1 0%,var(--c-bg) 100%);
  border-bottom:1px solid var(--c-line);
}
.page-hero::after{
  content:"";
  position:absolute;
  right:-60px;
  top:-40px;
  width:460px;
  height:300px;
  border-radius:26px;
  background:url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
  opacity:.14;
  pointer-events:none;
}
.page-hero .container{
  position:relative;
  z-index:1;
  padding-top:32px;
  padding-bottom:56px;
}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:14px;
  color:var(--c-ink-3);
  margin-bottom:20px;
  flex-wrap:wrap;
}
.breadcrumb a{color:var(--c-ink-3)}
.breadcrumb a:hover{color:var(--c-secondary)}
.breadcrumb .sep{color:var(--c-line)}
.breadcrumb .current{color:var(--c-primary);font-weight:600}
.page-hero h1{
  font-size:clamp(28px,3.7vw,46px);
  font-weight:800;
  line-height:1.24;
  letter-spacing:-.01em;
  max-width:900px;
}
.hero-lead{
  margin-top:14px;
  font-size:17px;
  color:var(--c-secondary);
  font-weight:600;
}
.hero-intro{
  margin-top:20px;
  max-width:840px;
  color:var(--c-ink-2);
  display:grid;
  gap:12px;
}
.hero-meta{
  margin-top:26px;
  display:flex;
  flex-wrap:wrap;
  gap:12px;
}
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:var(--c-mint);
  color:var(--c-secondary);
  font-size:12px;
  font-weight:600;
  padding:4px 10px;
  border-radius:6px;
}

/* ---------- 双栏布局 ---------- */
.layout{
  display:grid;
  grid-template-columns:240px minmax(0,1fr);
  gap:40px;
  align-items:start;
  padding-top:56px;
  padding-bottom:72px;
}
.toc{
  position:sticky;
  top:96px;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  padding:20px 16px;
  box-shadow:var(--sh-1);
}
.toc h2{
  font-size:14px;
  font-weight:700;
  color:var(--c-ink-3);
  letter-spacing:.08em;
  padding:0 8px 10px;
  border-bottom:1px solid var(--c-line);
  margin-bottom:10px;
}
.toc a{
  display:block;
  padding:10px 12px;
  font-size:14px;
  color:var(--c-ink-2);
  border-left:3px solid transparent;
  border-radius:0 var(--r-sm) var(--r-sm) 0;
  margin-bottom:2px;
}
.toc a:hover{background:var(--c-mint);color:var(--c-primary)}
.toc a.is-current{
  border-left-color:var(--c-primary);
  background:var(--c-mint);
  color:var(--c-primary);
  font-weight:600;
}
.toc-note{
  margin-top:16px;
  padding:14px;
  background:var(--c-accent-soft);
  border-radius:var(--r-md);
  font-size:13px;
  line-height:1.75;
  color:#8A4321;
}

/* ---------- 内容流 ---------- */
.content-flow{display:grid;gap:52px;min-width:0}
.section-title{
  position:relative;
  padding-left:16px;
  font-size:clamp(22px,2.5vw,28px);
  font-weight:700;
  line-height:1.35;
  margin-bottom:8px;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:.28em;
  width:4px;
  height:20px;
  border-radius:2px;
  background:var(--c-accent);
}
.section-sub{
  color:var(--c-ink-3);
  font-size:15px;
  margin-bottom:24px;
  padding-left:16px;
}

/* 要点卡 */
.points-grid{
  display:grid;
  grid-template-columns:minmax(0,2fr) minmax(0,1fr);
  gap:20px;
  align-items:start;
}
.card{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:16px;
  box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,border-color .22s ease,transform .22s ease;
}
.card:hover{box-shadow:var(--sh-2);border-color:var(--c-secondary)}
.point-main{padding:26px 26px 24px}
.icon-badge{
  width:44px;
  height:44px;
  border-radius:12px;
  background:var(--c-mint);
  color:var(--c-primary);
  display:grid;
  place-items:center;
  margin-bottom:16px;
}
.point-main h3{font-size:20px;font-weight:700;margin-bottom:12px}
.point-list{display:grid;gap:10px;color:var(--c-ink-2);font-size:15px}
.point-list li{
  position:relative;
  padding-left:20px;
}
.point-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:.68em;
  width:8px;
  height:8px;
  border-radius:50%;
  background:var(--c-accent);
}
.point-figure{
  margin-top:22px;
  border-radius:12px;
  overflow:hidden;
  border:1px solid var(--c-line);
}
.point-figure img{width:100%;aspect-ratio:16/9;object-fit:cover}
.point-figure figcaption{
  font-size:13px;
  color:var(--c-ink-3);
  text-align:center;
  padding:10px 12px;
  background:var(--c-bg);
}
.point-side{display:grid;gap:20px}
.mini-card{
  background:var(--c-mint);
  border:1px solid #D2E6DF;
  border-radius:16px;
  padding:20px;
}
.mini-card h4{
  font-size:16px;
  font-weight:700;
  color:var(--c-primary);
  margin-bottom:8px;
}
.mini-card p{font-size:14px;color:var(--c-ink-2);line-height:1.8}

/* 条目导航列表 */
.entry-list{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-lg);
  overflow:hidden;
  box-shadow:var(--sh-1);
}
.entry-list details{border-bottom:1px solid var(--c-line)}
.entry-list details:last-child{border-bottom:0}
.entry-list summary{
  display:grid;
  grid-template-columns:48px minmax(0,1fr) 28px;
  align-items:center;
  gap:16px;
  min-height:72px;
  padding:14px 24px;
  cursor:pointer;
  list-style:none;
  transition:background-color .22s ease;
}
.entry-list summary::-webkit-details-marker{display:none}
.entry-list summary:hover{background:var(--c-mint)}
.entry-list details[open] summary{background:var(--c-mint)}
.entry-no{
  width:32px;
  height:32px;
  border-radius:50%;
  background:var(--c-primary);
  color:#fff;
  font-size:13px;
  font-weight:700;
  display:grid;
  place-items:center;
}
.entry-list details[open] .entry-no{background:var(--c-accent)}
.entry-text{min-width:0}
.entry-text strong{display:block;font-size:17px;font-weight:600;color:var(--c-ink)}
.entry-text em{
  display:block;
  font-style:normal;
  font-size:14px;
  color:var(--c-ink-3);
  line-height:1.7;
}
.entry-arrow{
  justify-self:end;
  color:var(--c-secondary);
  font-size:18px;
  line-height:1;
  transition:transform .22s ease;
}
.entry-list summary:hover .entry-arrow{transform:translateX(4px)}
.entry-list details[open] .entry-arrow{transform:rotate(90deg)}
.entry-body{
  padding:0 24px 22px 88px;
  color:var(--c-ink-2);
  font-size:15px;
  display:grid;
  gap:10px;
}

/* 提示条 */
.tip-bar{
  display:flex;
  gap:16px;
  align-items:flex-start;
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-left:4px solid var(--c-accent);
  border-radius:0 var(--r-md) var(--r-md) 0;
  padding:18px 22px;
  box-shadow:var(--sh-1);
}
.tip-bar strong{color:var(--c-primary);font-size:16px;display:block;margin-bottom:4px}
.tip-bar p{font-size:14px;color:var(--c-ink-2);line-height:1.8}

/* FAQ */
.faq{max-width:860px}
.faq-item{
  background:var(--c-surface);
  border:1px solid var(--c-line);
  border-radius:var(--r-md);
  margin-bottom:10px;
  box-shadow:var(--sh-1);
  transition:box-shadow .22s ease,border-color .22s ease;
}
.faq-item:hover{box-shadow:var(--sh-2);border-color:var(--c-secondary)}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  font-size:17px;
  font-weight:600;
  cursor:pointer;
  list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";
  font-size:22px;
  line-height:1;
  color:var(--c-secondary);
  transition:transform .22s ease;
  flex:0 0 auto;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-body{
  padding:16px 22px 20px;
  border-top:1px solid var(--c-line);
  font-size:15px;
  color:var(--c-ink-2);
  line-height:1.85;
  display:grid;
  gap:8px;
}

/* CTA 带 */
.cta-band{
  position:relative;
  overflow:hidden;
  background:var(--c-dark);
  color:#fff;
  text-align:center;
  padding:80px 0;
}
.cta-band::before{
  content:"";
  position:absolute;
  left:50%;
  top:50%;
  width:640px;
  height:640px;
  transform:translate(-50%,-50%);
  border-radius:50%;
  border:1px solid rgba(255,255,255,.06);
  box-shadow:0 0 0 90px rgba(255,255,255,.03);
  pointer-events:none;
}
.cta-band .container{position:relative;z-index:1}
.cta-band h2{color:#fff;font-size:clamp(22px,2.6vw,30px);font-weight:700}
.cta-band p{
  margin-top:14px;
  color:rgba(255,255,255,.75);
  font-size:16px;
}
.cta-actions{
  margin-top:28px;
  display:flex;
  gap:12px;
  justify-content:center;
  flex-wrap:wrap;
}

/* 页脚 */
.site-footer{
  background:var(--c-dark);
  color:rgba(255,255,255,.72);
  padding-top:72px;
  font-size:14px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:36px;
  padding-bottom:48px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text strong{color:#fff}
.footer-brand .logo-text em{color:var(--c-accent)}
.footer-brand p{line-height:1.85;max-width:320px}
.site-footer h4{
  color:#fff;
  font-size:15px;
  font-weight:600;
  margin-bottom:16px;
}
.footer-links li{margin-bottom:10px}
.footer-links a{color:rgba(255,255,255,.72)}
.footer-links a:hover{color:var(--c-accent)}
.footer-contact p{margin-bottom:10px;line-height:1.7}
.footer-bottom{
  display:flex;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  padding:22px 0 26px;
  font-size:13px;
  color:rgba(255,255,255,.5);
}

/* 底部转化条 */
.bottom-bar{
  position:fixed;
  left:0;
  right:0;
  bottom:0;
  z-index:45;
  height:64px;
  background:var(--c-surface);
  border-top:1px solid var(--c-line);
  box-shadow:0 -8px 24px -16px rgba(12,59,52,.4);
  display:flex;
  align-items:center;
  transform:translateY(110%);
  opacity:0;
  transition:transform .3s ease,opacity .3s ease;
}
.bottom-bar.is-visible{transform:translateY(0);opacity:1}
.bottom-bar.is-hidden{transform:translateY(110%);opacity:0}
.bottom-bar .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.bottom-bar p{font-size:14px;color:var(--c-ink-2)}
.bottom-actions{display:flex;align-items:center;gap:14px}

/* 移动端抽屉 */
.drawer-mask{
  position:fixed;
  inset:0;
  background:rgba(8,32,29,.45);
  opacity:0;
  visibility:hidden;
  transition:opacity .28s ease,visibility .28s ease;
  z-index:60;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;
  top:0;
  right:0;
  bottom:0;
  width:86vw;
  max-width:380px;
  background:var(--c-surface);
  transform:translateX(100%);
  transition:transform .3s ease;
  z-index:61;
  display:flex;
  flex-direction:column;
  box-shadow:var(--sh-3);
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:14px 20px;
  border-bottom:1px solid var(--c-line);
}
.drawer-close{
  width:44px;
  height:44px;
  border:1px solid var(--c-line);
  background:var(--c-surface);
  border-radius:var(--r-md);
  font-size:20px;
  color:var(--c-primary);
  cursor:pointer;
  line-height:1;
}
.drawer-nav{padding:12px 20px;flex:1 1 auto;overflow-y:auto}
.drawer-nav a{
  display:flex;
  align-items:center;
  height:52px;
  border-bottom:1px solid var(--c-line);
  font-size:16px;
  color:var(--c-ink);
}
.drawer-nav a.is-active{color:var(--c-secondary);font-weight:600}
.drawer-foot{
  padding:18px 20px 22px;
  border-top:1px solid var(--c-line);
  display:grid;
  gap:12px;
}
.drawer-foot p{font-size:13px;color:var(--c-ink-3);line-height:1.7}
.drawer-foot .btn{width:100%}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .layout{grid-template-columns:minmax(0,1fr);gap:32px;padding-top:44px}
  .toc{position:static;padding:18px 14px}
  .toc a{display:inline-block;margin:0 4px 6px 0;border-left:0;border-bottom:3px solid transparent;border-radius:var(--r-sm) var(--r-sm) 0 0}
  .toc a.is-current{border-left:0;border-bottom-color:var(--c-primary);background:var(--c-mint)}
  .toc-note{margin-top:12px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:1023px){
  .nav-menu{display:none}
  .nav-right .btn--ghost{display:none}
  .nav-toggle{display:block}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .topbar-right{display:none}
  .page-hero .container{padding-top:22px;padding-bottom:40px}
  .page-hero::after{width:320px;height:220px;opacity:.1}
  .points-grid{grid-template-columns:minmax(0,1fr)}
  .entry-list summary{grid-template-columns:40px minmax(0,1fr) 24px;gap:12px;padding:14px 16px}
  .entry-body{padding:0 16px 18px 68px}
  .point-main{padding:20px}
  .cta-band{padding:56px 0}
  .site-footer{padding-top:48px}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;gap:8px;padding-bottom:20px}
  .bottom-bar{height:60px}
  .bottom-bar{transform:translateY(0);opacity:1}
  .bottom-bar.is-hidden{transform:translateY(110%);opacity:0}
  .bottom-bar p{font-size:13px;max-width:150px;line-height:1.4}
  .bottom-actions .link-arrow{display:none}
}
@media (max-width:520px){
  body{font-size:15px}
  .logo-text strong{font-size:18px}
  .logo-text em{font-size:12px}
  .nav{height:62px}
  .page-hero h1{font-size:26px}
  .hero-lead{font-size:15px}
  .section-title{padding-left:14px}
  .section-sub{padding-left:14px}
  .cta-actions .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition:none !important;scroll-behavior:auto !important}
}

/* roulang page: category2 */
:root{
  --c-primary:#0C3B34;
  --c-primary-600:#0A2E29;
  --c-primary-300:#2E7A6B;
  --c-accent:#F0602A;
  --c-accent-600:#D9501F;
  --c-secondary:#17857A;
  --c-ink:#14201D;
  --c-ink-2:#4A5A56;
  --c-ink-3:#7C8B86;
  --c-line:#DDE5E0;
  --c-bg:#F5F8F5;
  --c-surface:#FFFFFF;
  --c-dark:#08201D;
  --c-accent-soft:#FDEDE5;
  --c-mint:#E6F2EE;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(12,59,52,.06);
  --sh-2:0 8px 24px -8px rgba(12,59,52,.14);
  --sh-3:0 18px 48px -16px rgba(12,59,52,.20);
  --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","HarmonyOS Sans SC","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--c-ink);
  background:var(--c-bg);
  padding-bottom:76px;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;object-fit:cover}
a{color:inherit;text-decoration:none;transition:color .22s ease}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul{padding:0;margin:0;list-style:none}
p{margin:0 0 1.1em;text-align:left}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:700;color:var(--c-primary)}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  border:1.5px solid transparent;cursor:pointer;
  transition:background-color .22s ease,border-color .22s ease,color .22s ease,transform .22s ease,box-shadow .22s ease;
}
.btn:active{transform:scale(.98)}
.btn--primary{background:var(--c-accent);color:#fff;box-shadow:var(--sh-2)}
.btn--primary:hover{background:var(--c-accent-600);transform:translateY(-1px)}
.btn--outline{background:transparent;border-color:var(--c-primary);color:var(--c-primary);border-radius:var(--r-md)}
.btn--outline:hover{background:var(--c-mint);transform:translateY(-1px)}
.btn--ghost{background:transparent;border-color:var(--c-line);color:var(--c-primary);border-radius:var(--r-md)}
.btn--ghost:hover{border-color:var(--c-secondary);color:var(--c-secondary)}
.btn--light{background:transparent;border-color:rgba(255,255,255,.6);color:#fff;border-radius:var(--r-md)}
.btn--light:hover{background:rgba(255,255,255,.12);border-color:#fff}
.btn--sm{height:36px;padding:0 16px;font-size:14px}
.btn[disabled]{opacity:.45;cursor:not-allowed}

.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--c-secondary)}
.link-arrow::after{content:"→";transition:transform .2s ease}
.link-arrow:hover{color:var(--c-accent)}
.link-arrow:hover::after{transform:translateX(2px)}

.badge{
  display:inline-block;padding:4px 10px;border-radius:6px;
  background:var(--c-mint);color:var(--c-secondary);
  font-size:12px;font-weight:600;line-height:1.6;
}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:var(--c-surface);
  border-bottom:1px solid var(--c-line);
  transition:box-shadow .22s ease;
}
.site-header.is-stuck{box-shadow:var(--sh-2)}
.nav{display:flex;align-items:center;gap:28px;height:68px}
.logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:38px;height:38px;border-radius:11px;flex-shrink:0;
  background:linear-gradient(140deg,var(--c-primary),var(--c-secondary));
  color:#fff;font-weight:800;font-size:19px;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:.02em;
}
.logo-text{display:flex;flex-direction:column;line-height:1.15}
.logo-text strong{font-size:20px;font-weight:800;color:var(--c-primary);letter-spacing:-.01em}
.logo-text em{font-style:normal;font-size:13px;color:var(--c-accent);font-weight:600;letter-spacing:.02em}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-menu a{
  padding:10px 16px;border-radius:var(--r-pill);
  font-size:15px;font-weight:500;color:var(--c-ink-2);
  transition:background-color .22s ease,color .22s ease;
}
.nav-menu a:hover{background:var(--c-bg);color:var(--c-primary)}
.nav-menu a.is-active{background:var(--c-mint);color:var(--c-secondary);font-weight:600}
.nav-right{display:flex;align-items:center;gap:12px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:12px;
  border:1px solid var(--c-line);position:relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after{
  position:absolute;left:50%;width:18px;height:2px;border-radius:2px;
  background:var(--c-primary);transform:translateX(-50%);
  transition:transform .22s ease,opacity .22s ease;
}
.nav-toggle span{top:50%;margin-top:-1px}
.nav-toggle span::before{content:"";top:-6px;left:0;transform:none}
.nav-toggle span::after{content:"";top:6px;left:0;transform:none}
body.nav-open .nav-toggle span{background:transparent}
body.nav-open .nav-toggle span::before{transform:rotate(45deg);top:0}
body.nav-open .nav-toggle span::after{transform:rotate(-45deg);top:0}
.nav-close{
  display:none;position:absolute;top:14px;right:14px;
  width:44px;height:44px;border-radius:12px;border:1px solid var(--c-line);
  font-size:20px;line-height:1;color:var(--c-primary);
}
.nav-menu__cta{display:none}

/* ---------- 分类 Hero ---------- */
.cat-hero{
  position:relative;overflow:hidden;
  background:var(--c-mint);
  border-bottom:1px solid var(--c-line);
  padding:56px 0 64px;
}
.cat-hero::after{
  content:"";position:absolute;left:-40px;bottom:-60px;
  width:120px;height:120px;border-radius:50%;
  border:16px solid var(--c-accent);
  opacity:.1;pointer-events:none;
}
.cat-hero::before{
  content:"";position:absolute;right:-70px;top:-70px;
  width:200px;height:200px;border-radius:32px;
  background:var(--c-primary);opacity:.06;transform:rotate(18deg);
  pointer-events:none;
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:14px;color:var(--c-ink-3);margin-bottom:20px;position:relative;z-index:2;
}
.breadcrumb a:hover{color:var(--c-secondary)}
.breadcrumb .sep{color:var(--c-line);font-weight:700}
.breadcrumb .current{color:var(--c-ink-2)}
.cat-hero h1{
  font-size:clamp(30px,4.2vw,52px);font-weight:800;line-height:1.22;
  letter-spacing:-.01em;position:relative;z-index:2;
}
.cat-hero__sub{
  margin:16px 0 0;font-size:17px;color:var(--c-ink-2);max-width:720px;
  position:relative;z-index:2;
}
.cat-hero__meta{
  display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;position:relative;z-index:2;
}

/* ---------- 通用板块 ---------- */
.section{padding:88px 0}
.section--surface{background:var(--c-surface)}
.section--tight{padding:64px 0}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head__bar{
  display:block;width:4px;height:20px;border-radius:2px;
  background:var(--c-accent);margin-bottom:14px;
}
.sec-head h2{font-size:clamp(24px,2.6vw,34px);font-weight:700;line-height:1.3}
.sec-head p{margin-top:12px;color:var(--c-ink-2);font-size:16px}

.prose{max-width:840px}
.prose p{color:var(--c-ink-2);font-size:16.5px;line-height:1.88}
.prose p strong{color:var(--c-primary)}

/* ---------- 卡片瀑布 ---------- */
.cards-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:16px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.card:hover{transform:translateY(-1px);box-shadow:var(--sh-2);border-color:var(--c-secondary)}
.card__media{aspect-ratio:16/9;overflow:hidden;background:linear-gradient(140deg,var(--c-primary),var(--c-secondary))}
.card__media img{width:100%;height:100%;transition:transform .4s ease}
.card:hover .card__media img{transform:scale(1.04)}
.card__body{padding:24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card__body h3{font-size:20px;font-weight:700;color:var(--c-primary);line-height:1.45}
.card__body p{
  margin:0;font-size:15px;line-height:1.8;color:var(--c-ink-2);
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.card__foot{margin-top:auto;padding-top:6px}

/* ---------- 提示带 ---------- */
.notice-band{
  display:flex;gap:16px;align-items:flex-start;
  border-left:4px solid var(--c-accent);
  background:var(--c-accent-soft);
  border-radius:14px;padding:22px 26px;margin:40px 0 0;
}
.notice-band__icon{
  flex-shrink:0;width:26px;height:26px;border-radius:50%;
  background:var(--c-accent);color:#fff;font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin-top:5px;
}
.notice-band p{margin:0;font-size:15px;line-height:1.8;color:var(--c-ink-2)}
.notice-band strong{color:var(--c-primary)}

/* ---------- 阶段速览 ---------- */
.stage-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stage-card{
  position:relative;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:16px;
  padding:26px 24px;box-shadow:var(--sh-1);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.stage-card:hover{transform:translateY(-1px);box-shadow:var(--sh-2);border-color:var(--c-secondary)}
.stage-card__num{
  display:block;font-size:13px;font-weight:700;letter-spacing:.08em;
  color:var(--c-accent);margin-bottom:12px;
}
.stage-card h3{font-size:17px;font-weight:700;margin-bottom:10px}
.stage-card p{margin:0;font-size:14.5px;line-height:1.8;color:var(--c-ink-2)}

/* ---------- FAQ ---------- */
.faq{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{
  background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:14px;box-shadow:var(--sh-1);overflow:hidden;
  transition:border-color .22s ease,box-shadow .22s ease;
}
.faq-item:hover{border-color:var(--c-secondary)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;text-align:left;font-size:17px;font-weight:600;color:var(--c-primary);
}
.faq-icon{
  position:relative;flex-shrink:0;width:24px;height:24px;
  transition:transform .28s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--c-accent);
  border-radius:2px;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-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a__inner{padding:0 22px 20px;border-top:1px solid var(--c-line);margin-top:0;padding-top:16px}
.faq-a__inner p{margin:0;font-size:15px;line-height:1.85;color:var(--c-ink-2)}

/* ---------- CTA 带 ---------- */
.cta-band{
  position:relative;overflow:hidden;
  background-color:var(--c-dark);
  background-image:linear-gradient(rgba(8,32,29,.92),rgba(8,32,29,.96)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  padding:80px 0;
  text-align:center;
}
.cta-band::after{
  content:"";position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  width:520px;height:520px;border-radius:50%;
  border:1px solid rgba(255,255,255,.07);box-shadow:0 0 0 80px rgba(255,255,255,.03);
  pointer-events:none;
}
.cta-band h2{color:#fff;font-size:clamp(24px,2.6vw,34px);position:relative;z-index:2}
.cta-band p{
  color:rgba(255,255,255,.78);margin:14px auto 30px;max-width:620px;
  font-size:16px;position:relative;z-index:2;
}
.cta-band .cta-actions{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:center;position:relative;z-index:2;
}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--c-dark);color:rgba(255,255,255,.72);
  padding:72px 0 32px;font-size:14px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px;
}
.footer-brand .logo-mark{background:linear-gradient(140deg,var(--c-secondary),var(--c-primary-300))}
.footer-brand .logo-text strong{color:#fff}
.footer-brand .logo-text em{color:var(--c-accent)}
.footer-brand p{margin:18px 0 0;line-height:1.85;color:rgba(255,255,255,.66);font-size:14px}
.site-footer h4{font-size:15px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-links li{margin-bottom:10px}
.footer-links a{color:rgba(255,255,255,.7);font-size:14px}
.footer-links a:hover{color:var(--c-accent)}
.footer-contact p{margin:0 0 10px;color:rgba(255,255,255,.7)}
.footer-bottom{
  margin-top:52px;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 底部转化条 ---------- */
.fixed-bar{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:var(--c-surface);border-top:1px solid var(--c-line);
  box-shadow:0 -8px 24px -14px rgba(12,59,52,.28);
  opacity:0;transform:translateY(100%);pointer-events:none;
  transition:opacity .28s ease,transform .28s ease;
}
.fixed-bar.is-visible{opacity:1;transform:none;pointer-events:auto}
.fixed-bar.is-hidden{opacity:0;transform:translateY(100%);pointer-events:none}
.fixed-bar__inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:64px;padding-top:10px;padding-bottom:10px;
}
.fixed-bar__text{display:flex;align-items:center;gap:10px;margin:0;font-size:14px;color:var(--c-ink-2)}
.fixed-bar__text::before{
  content:"";width:8px;height:8px;border-radius:50%;background:var(--c-accent);flex-shrink:0;
}
.fixed-bar__actions{display:flex;align-items:center;gap:16px;flex-shrink:0}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s ease,transform .4s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .nav-menu{
    position:fixed;top:0;right:0;height:100vh;width:86vw;max-width:380px;
    flex-direction:column;align-items:stretch;gap:0;
    padding:84px 20px 24px;margin-left:0;
    background:var(--c-surface);box-shadow:var(--sh-3);
    transform:translateX(100%);transition:transform .3s ease;
    z-index:90;overflow-y:auto;
  }
  body.nav-open .nav-menu{transform:none}
  body.nav-open{overflow:hidden}
  .nav-menu a{
    height:52px;display:flex;align-items:center;
    padding:0 6px;border-radius:0;border-bottom:1px solid var(--c-line);
    font-size:16px;
  }
  .nav-menu a.is-active{background:transparent;color:var(--c-secondary)}
  .nav-close{display:flex;align-items:center;justify-content:center}
  .nav-toggle{display:flex;align-items:center;justify-content:center;order:3}
  .nav-right .btn{display:none}
  .nav{justify-content:space-between}
  .stage-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .section{padding:64px 0}
}
@media (max-width:768px){
  body{padding-bottom:72px}
  .container{padding:0 16px}
  .cat-hero{padding:40px 0 48px}
  .cat-hero__sub{font-size:16px}
  .section{padding:48px 0}
  .cards-grid{grid-template-columns:1fr;gap:20px}
  .stage-grid{grid-template-columns:1fr}
  .card__body{padding:20px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .site-footer{padding:48px 0 24px}
  .cta-band{padding:56px 0}
  .fixed-bar__inner{min-height:60px}
  .fixed-bar__text{font-size:13px}
  .fixed-bar__actions .link-arrow{display:none}
}
@media (max-width:520px){
  .cat-hero h1{font-size:30px}
  .btn{width:100%}
  .cta-actions .btn{width:100%}
  .fixed-bar__actions .btn{width:auto}
  .nav-right .btn--sm{display:none}
}