/* roulang page: index */
:root{
  --ink-900:#050F16;
  --ink-800:#071A24;
  --ink-700:#0B2531;
  --jade-400:#3DD9C6;
  --jade-500:#19C2B0;
  --jade-600:#0E9E92;
  --warm:#FFB25C;
  --txt:#EAF4F6;
  --txt-2:#9FB6C2;
  --txt-3:#6B8390;
  --line:rgba(61,217,198,.14);
  --line-strong:rgba(61,217,198,.38);
  --glass:rgba(255,255,255,.045);
  --r-card:18px;
  --r-panel:22px;
  --r-ctrl:12px;
  --shadow-glow:0 8px 30px -10px rgba(25,194,176,.5);
  --shadow-lift:0 18px 40px -24px rgba(0,0,0,.75);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:104px}
body{
  margin:0;
  background-color:var(--ink-900);
  background-image:
    radial-gradient(900px 620px at 80% -8%, rgba(25,194,176,.14), transparent 65%),
    radial-gradient(760px 520px at 4% 10%, rgba(14,158,146,.10), transparent 70%);
  background-repeat:no-repeat;
  color:var(--txt);
  font-family:'HarmonyOS Sans','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  font-size:16px;
  line-height:1.75;
  -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:2px solid var(--jade-400);outline-offset:2px;border-radius:6px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}

.section{padding:56px 0;position:relative}
@media(min-width:768px){.section{padding:72px 0}}
@media(min-width:1024px){.section{padding:100px 0}}

.glass{
  background:var(--glass);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.025);
  transition:border-color .3s ease,transform .3s ease,box-shadow .3s ease,background .3s ease;
}
.glass:hover{border-color:var(--line-strong)}
.card-lift:hover{transform:translateY(-2px);box-shadow:var(--shadow-lift),var(--shadow-glow)}
.h2-bar{position:relative;padding-left:16px;font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.3;letter-spacing:-.01em}
.h2-bar::before{content:'';position:absolute;left:0;top:.34em;width:4px;height:18px;border-radius:2px;background:var(--jade-500)}
.section-sub{margin-top:14px;color:var(--txt-2);font-size:15px;max-width:720px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.08em;color:var(--jade-400);text-transform:uppercase}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 24px;font-size:15px;font-weight:600;line-height:1.2;border:1px solid transparent;cursor:pointer;transition:all .25s ease;white-space:nowrap}
.btn-glow{background:linear-gradient(90deg,#19C2B0,#0E9E92);color:#05121A;box-shadow:var(--shadow-glow)}
.btn-glow:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 12px 38px -8px rgba(25,194,176,.68)}
.btn-glow:active{transform:translateY(1px);filter:brightness(.96)}
.btn-ghost{background:transparent;border-color:rgba(61,217,198,.3);color:var(--txt)}
.btn-ghost:hover{background:rgba(61,217,198,.1);border-color:var(--line-strong)}
.btn-ghost:active{transform:translateY(1px)}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--txt);font-size:14px;font-weight:600;transition:color .25s ease}
.btn-text .arw{transition:transform .25s ease}
.btn-text:hover{color:var(--jade-400)}
.btn-text:hover .arw{transform:translateX(3px)}
.btn:disabled,.btn[disabled]{opacity:.45;box-shadow:none;cursor:not-allowed}

.chip{display:inline-flex;align-items:center;gap:6px;font-size:12px;line-height:1;padding:6px 10px;border-radius:999px;background:rgba(25,194,176,.14);color:var(--jade-400);border:1px solid rgba(25,194,176,.18)}
.chip-warm{background:rgba(255,178,92,.14);color:var(--warm);border-color:rgba(255,178,92,.22)}
.badge{display:inline-flex;align-items:center;gap:8px;font-size:13px;padding:7px 14px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--txt-2)}
.dot{width:7px;height:7px;border-radius:999px;background:var(--jade-400);box-shadow:0 0 0 4px rgba(61,217,198,.14);flex:none}

.stat-num{font-size:clamp(26px,3.4vw,40px);font-weight:700;line-height:1.15;font-variant-numeric:tabular-nums;background:linear-gradient(120deg,#3DD9C6,#0E9E92);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat-label{font-size:12px;color:var(--txt-3);line-height:1.5}
.tnum{font-variant-numeric:tabular-nums}

.fish-scale{position:relative;overflow:hidden}
.fish-scale::after{
  content:'';position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(circle at 14px 14px, transparent 12px, rgba(61,217,198,.055) 13px, transparent 14px);
  background-size:28px 28px;
}
.stripe{background-image:repeating-linear-gradient(135deg, rgba(61,217,198,.055) 0 8px, transparent 8px 18px)}

.site-header{position:fixed;top:0;left:0;right:0;z-index:70;background:rgba(7,26,36,.72);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid rgba(61,217,198,.12);transition:background .3s ease,box-shadow .3s ease}
.site-header.scrolled{background:rgba(5,15,22,.94);box-shadow:0 14px 34px -22px rgba(25,194,176,.6)}
.nav-shell{display:flex;align-items:center;gap:14px;height:74px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:38px;height:38px;border-radius:12px;background:linear-gradient(140deg,rgba(61,217,198,.22),rgba(14,158,146,.12));border:1px solid rgba(61,217,198,.3);display:grid;place-items:center;color:var(--jade-400)}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:15px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-sub{font-size:11px;color:var(--txt-3);white-space:nowrap}
.nav-panel{display:none}
@media(min-width:1024px){
  .nav-panel{display:flex;align-items:center;gap:6px;margin-left:auto;padding:6px;border-radius:18px;background:rgba(255,255,255,.03);border:1px solid rgba(61,217,198,.10)}
  .nav-scroll{display:none}
}
.nav-card{display:flex;align-items:center;gap:10px;padding:8px 14px;border-radius:12px;border-bottom:2px solid transparent;transition:background .25s ease,border-color .25s ease}
.nav-card .nc-icon{color:var(--txt-3);flex:none;transition:color .25s ease}
.nav-card .nc-title{font-size:14px;font-weight:600;color:var(--txt);white-space:nowrap}
.nav-card .nc-desc{font-size:12px;color:var(--txt-3);white-space:nowrap}
.nav-card:hover{background:rgba(61,217,198,.08)}
.nav-card:hover .nc-icon{color:var(--jade-400)}
.nav-card.active{background:rgba(61,217,198,.10);border-bottom-color:var(--jade-400)}
.nav-card.active .nc-title{color:var(--jade-400)}
.nav-card.active .nc-icon{color:var(--jade-400)}
.nav-cta{display:none}
@media(min-width:1024px){.nav-cta{display:block;margin-left:12px}}
.burger{display:grid;place-items:center;margin-left:auto;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.04);cursor:pointer;transition:background .25s ease}
.burger:hover{background:rgba(61,217,198,.12)}
@media(min-width:1024px){.burger{display:none}}

.nav-strip{display:flex;gap:8px;overflow-x:auto;padding-bottom:10px;scrollbar-width:none}
.nav-strip::-webkit-scrollbar{display:none}
@media(min-width:1024px){.nav-strip{display:none}}
.nav-strip .nav-card{background:rgba(255,255,255,.04);border:1px solid var(--line);flex:none}

.drawer{position:fixed;inset:0;z-index:90;visibility:hidden}
.drawer.open{visibility:visible}
.drawer-mask{position:absolute;inset:0;background:rgba(5,15,22,.8);opacity:0;transition:opacity .3s ease}
.drawer.open .drawer-mask{opacity:1}
.drawer-panel{position:absolute;top:0;right:0;height:100%;width:88%;max-width:370px;background:#071A24;border-left:1px solid rgba(61,217,198,.16);padding:22px;transform:translateX(100%);transition:transform .38s cubic-bezier(.22,.61,.36,1);overflow-y:auto}
.drawer.open .drawer-panel{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
.drawer-close{width:38px;height:38px;border-radius:11px;border:1px solid var(--line);background:rgba(255,255,255,.04);cursor:pointer;display:grid;place-items:center}
.drawer-link{display:flex;align-items:center;gap:12px;padding:14px;border-radius:14px;border:1px solid var(--line);background:rgba(255,255,255,.035);margin-bottom:10px;transition:background .25s ease}
.drawer-link:hover{background:rgba(61,217,198,.1)}
.drawer-link.active{border-color:var(--line-strong);background:rgba(61,217,198,.10)}

.hero{padding-top:118px;position:relative}
@media(min-width:1024px){.hero{padding-top:150px}}
.hero h1{font-size:clamp(28px,4.2vw,44px);font-weight:700;line-height:1.25;letter-spacing:-.01em;margin-top:16px}
.hero-sub{margin-top:18px;color:var(--txt-2);font-size:16px;max-width:560px;line-height:1.8}
.hero-mask{background:linear-gradient(to top, rgba(5,15,22,.94) 6%, rgba(5,15,22,.62) 45%, rgba(5,15,22,.32) 100%)}
.hero-visual{position:relative}
.status-card{position:absolute;left:-6px;bottom:-26px;width:214px;padding:16px;border-radius:var(--r-card)}
@media(min-width:640px){.status-card{left:-20px;width:230px}}
@media(min-width:1024px){.status-card{left:-34px}}
.metric-row{display:flex;align-items:baseline;gap:8px}
.metric-num{font-size:22px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--jade-400)}

.trust-mini{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.trust-mini span{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--txt-2);padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.04);border:1px solid rgba(61,217,198,.12)}

.stats-band{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:48px}
@media(min-width:1024px){.stats-band{grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;margin-top:64px}}
.stat-cell{padding:20px;border-radius:var(--r-card);background:rgba(255,255,255,.045);border:1px solid var(--line);backdrop-filter:blur(12px);transition:border-color .3s ease,transform .3s ease}
.stat-cell:hover{border-color:var(--line-strong);transform:translateY(-2px)}

.step{padding:22px;border-radius:var(--r-card);background:rgba(255,255,255,.04);border:1px solid var(--line);transition:border-color .3s ease,transform .3s ease,background .3s ease}
.step:hover{border-color:var(--line-strong);transform:translateY(-2px);background:rgba(255,255,255,.06)}
.step-no{display:block;font-size:42px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums;color:transparent;-webkit-text-stroke:1px rgba(61,217,198,.5);letter-spacing:.02em}
.step-dot{display:block;width:8px;height:8px;border-radius:999px;background:var(--warm);margin:14px 0 14px;box-shadow:0 0 0 5px rgba(255,178,92,.12)}
.step h3{font-size:17px;font-weight:600;line-height:1.4}
.step p{margin-top:8px;font-size:14px;color:var(--txt-2);line-height:1.75}

.bento-card{display:flex;flex-direction:column;overflow:hidden;border-radius:var(--r-panel);padding:0}
.bento-media{position:relative;overflow:hidden;aspect-ratio:16/9;background:linear-gradient(140deg,#0B2531,#071A24)}
.bento-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.bento-card:hover .bento-media img{transform:scale(1.03)}
.bento-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.bento-title{font-size:18px;font-weight:600;line-height:1.45}
.bento-desc{font-size:14px;color:var(--txt-2);line-height:1.75}
.wide-card{flex-direction:row;align-items:center;gap:0}
@media(max-width:767px){.wide-card{flex-direction:column}}
.wide-card .bento-media{aspect-ratio:16/9;width:100%;flex:1}
@media(min-width:768px){.wide-card .bento-media{aspect-ratio:auto;width:46%;min-height:190px;flex:none}}
.wide-card .bento-body{flex:1}

.img-fallback{display:grid;place-items:center;background:linear-gradient(140deg,#0B2531,#071A24);border:1px dashed rgba(61,217,198,.3);color:var(--jade-400);aspect-ratio:16/9;border-radius:14px}

.cms-card{display:flex;flex-direction:column;overflow:hidden;border-radius:var(--r-card)}
.cms-cover{aspect-ratio:16/9;overflow:hidden;background:#0B2531}
.cms-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.cms-card:hover .cms-cover img{transform:scale(1.03)}
.cms-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.cms-title{font-size:17px;font-weight:600;line-height:1.5}
.cms-title a{transition:color .25s ease}
.cms-title a:hover{color:var(--jade-400)}
.cms-excerpt{font-size:14px;color:var(--txt-2);line-height:1.75}
.cms-meta{margin-top:auto;padding-top:12px;border-top:1px solid rgba(61,217,198,.1);display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--txt-3)}
.clamp-2{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{border:1px dashed rgba(61,217,198,.3);border-radius:var(--r-card);padding:40px 20px;text-align:center;color:var(--txt-2);background:rgba(255,255,255,.02)}

.side-panel{padding:20px;border-radius:var(--r-card)}
.side-title{font-size:14px;font-weight:600;color:var(--jade-400);margin-bottom:14px;letter-spacing:.02em}
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.side-list li{padding:11px 0;border-bottom:1px dashed rgba(61,217,198,.14);font-size:14px;color:var(--txt-2);display:flex;justify-content:space-between;gap:12px}
.side-list li:last-child{border-bottom:0}
.side-list li a{transition:color .25s ease}
.side-list li a:hover{color:var(--jade-400)}

.proof-card{padding:22px;border-radius:var(--r-card)}
.review-card{padding:22px;border-radius:var(--r-card);min-height:100%}
.review-stars{display:flex;gap:4px;color:var(--jade-400)}
.review-text{margin-top:12px;font-size:14.5px;color:var(--txt);line-height:1.8}
.review-user{margin-top:14px;font-size:12.5px;color:var(--txt-3)}
.scroll-x{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.scroll-x{grid-template-columns:repeat(3,minmax(0,1fr))}}

.faq-item{border-radius:var(--r-card);padding:0 20px;margin-bottom:12px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 0;font-size:16.5px;font-weight:600;position:relative;transition:color .25s ease}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--jade-400)}
.faq-item summary::after{
  content:'';flex:none;width:16px;height:16px;border-radius:5px;
  background-image:linear-gradient(var(--jade-400),var(--jade-400)),linear-gradient(var(--jade-400),var(--jade-400));
  background-size:11px 1.6px,1.6px 11px;
  background-position:center,center;
  background-repeat:no-repeat;
  transition:transform .28s ease,background-size .28s ease;
}
.faq-item[open]{background:rgba(255,255,255,.075);border-color:var(--line-strong)}
.faq-item[open] summary::after{transform:rotate(90deg);background-size:11px 1.6px,0 0}
.faq-item[open] summary::before{content:'';position:absolute;left:-20px;top:14px;bottom:14px;width:3px;border-radius:2px;background:var(--jade-500)}
.faq-body{padding:0 0 20px;font-size:14.5px;color:var(--txt-2);line-height:1.85;max-width:820px}

.cta-panel{padding:28px;border-radius:var(--r-panel);position:relative;overflow:hidden}
@media(min-width:768px){.cta-panel{padding:46px}}
.form-input{height:48px;border-radius:var(--r-ctrl);background:rgba(5,15,22,.62);border:1px solid rgba(255,255,255,.12);padding:0 16px;font-size:15px;color:var(--txt);width:100%;transition:border-color .25s ease,box-shadow .25s ease}
.form-input::placeholder{color:var(--txt-3)}
.form-input:focus{outline:none;border-color:var(--jade-400);box-shadow:0 0 0 2px rgba(61,217,198,.22)}
.form-input.error{border-color:#F87171;box-shadow:0 0 0 2px rgba(248,113,113,.18)}
.form-msg{margin-top:10px;font-size:12px;min-height:18px;color:var(--txt-3)}
.form-msg.err{color:#F87171}
.form-msg.ok{color:#4ADE80}

.site-footer{border-top:1px solid rgba(61,217,198,.12);background:rgba(5,15,22,.72);margin-top:20px;position:relative}
.footer-title{font-size:14px;font-weight:600;color:var(--jade-400);margin-bottom:14px}
.footer-link{display:block;font-size:14px;color:var(--txt-2);padding:5px 0;transition:color .25s ease,transform .25s ease}
.footer-link:hover{color:var(--txt);transform:translateX(2px)}
.footer-bottom{border-top:1px solid rgba(61,217,198,.1);padding:20px 0;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13px;color:var(--txt-3)}
.footer-bottom a:hover{color:var(--jade-400)}

.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s cubic-bezier(.22,.61,.36,1),transform .4s cubic-bezier(.22,.61,.36,1)}
.reveal.on{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  .card-lift:hover,.step:hover,.stat-cell:hover{transform:none}
}

::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:#071A24}
::-webkit-scrollbar-thumb{background:rgba(25,194,176,.3);border-radius:8px}
::-webkit-scrollbar-thumb:hover{background:rgba(25,194,176,.5)}

.to-top{position:fixed;right:18px;bottom:22px;width:46px;height:46px;border-radius:999px;display:grid;place-items:center;background:linear-gradient(140deg,rgba(25,194,176,.9),rgba(14,158,146,.9));color:#05121A;box-shadow:var(--shadow-glow);border:0;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s ease;z-index:60}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{filter:brightness(1.08)}

/* roulang page: category1 */
:root{
    --bg-900:#050F16;
    --bg-800:#071A24;
    --bg-700:#0B2531;
    --brand-500:#19C2B0;
    --brand-400:#3DD9C6;
    --brand-600:#0E9E92;
    --amber:#FFB25C;
    --txt-1:#EAF4F6;
    --txt-2:#9FB6C2;
    --txt-3:#6B8390;
    --ink:#05121A;
    --ok:#4ADE80;
    --err:#F87171;
    --warn:#FBBF24;
    --line:rgba(61,217,198,.14);
    --line-strong:rgba(61,217,198,.38);
    --surface:rgba(255,255,255,.045);
    --surface-2:rgba(255,255,255,.07);
    --radius-card:18px;
    --radius-panel:22px;
    --radius-sm:12px;
    --glow:0 8px 30px -10px rgba(25,194,176,.5);
    --lift:0 18px 40px -24px rgba(0,0,0,.75);
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{-webkit-text-size-adjust:100%}
  body{
    margin:0;
    background:var(--bg-900);
    color:var(--txt-1);
    font-family:HarmonyOS Sans,PingFang SC,Microsoft YaHei,system-ui,Inter,sans-serif;
    font-size:16px;
    line-height:1.75;
    letter-spacing:.01em;
    overflow-x:hidden;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    pointer-events:none;
    background:
      radial-gradient(900px 520px at 12% -8%, rgba(25,194,176,.16), transparent 62%),
      radial-gradient(760px 480px at 92% 6%, rgba(61,217,198,.10), transparent 66%);
    z-index:0;
  }
  img{max-width:100%;display:block;border-style:none}
  a{color:inherit;text-decoration:none}
  button,input{font:inherit;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  ::selection{background:rgba(25,194,176,.32);color:#fff}

  body .container{
    position:relative;
    z-index:1;
    width:100%;
    max-width:1200px;
    margin-left:auto;
    margin-right:auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:768px){
    body .container{padding-left:32px;padding-right:32px}
  }

  /* 滚动条 */
  ::-webkit-scrollbar{width:8px;height:8px}
  ::-webkit-scrollbar-track{background:var(--bg-800)}
  ::-webkit-scrollbar-thumb{background:rgba(25,194,176,.32);border-radius:999px}
  ::-webkit-scrollbar-thumb:hover{background:rgba(25,194,176,.55)}

  :focus-visible{outline:2px solid var(--brand-400);outline-offset:2px;border-radius:6px}

  /* 导航 */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(7,26,36,.72);
    backdrop-filter:blur(16px);
    -webkit-backdrop-filter:blur(16px);
    border-bottom:1px solid var(--line);
    transition:background .3s var(--ease), box-shadow .3s var(--ease);
  }
  .site-header.is-scrolled{
    background:rgba(5,15,22,.92);
    box-shadow:0 12px 34px -22px rgba(0,0,0,.9), 0 0 0 1px rgba(61,217,198,.08);
  }
  .nav-shell{
    display:flex;
    align-items:center;
    gap:18px;
    min-height:76px;
    padding:10px 0;
  }
  .brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:38px;height:38px;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:12px;
    color:var(--brand-400);
    background:linear-gradient(140deg, rgba(25,194,176,.22), rgba(61,217,198,.06));
    border:1px solid var(--line);
    box-shadow:0 0 0 1px rgba(61,217,198,.06), var(--glow);
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.2}
  .brand-name{font-size:15.5px;font-weight:700;letter-spacing:.01em;color:var(--txt-1);white-space:nowrap}
  .brand-sub{font-size:11.5px;color:var(--txt-3);letter-spacing:.06em}

  .nav-panel{
    display:flex;
    align-items:center;
    gap:8px;
    padding:6px;
    margin-left:auto;
    border-radius:16px;
    background:rgba(255,255,255,.04);
    border:1px solid var(--line);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
  }
  .nav-card{
    display:flex;
    align-items:center;
    gap:9px;
    padding:8px 12px;
    border-radius:12px;
    border:1px solid transparent;
    transition:background .25s var(--ease), border-color .25s var(--ease), transform .25s var(--ease);
  }
  .nav-card .nc-icon{
    width:28px;height:28px;flex-shrink:0;
    display:inline-flex;align-items:center;justify-content:center;
    border-radius:9px;
    color:var(--brand-400);
    background:rgba(25,194,176,.12);
    border:1px solid rgba(61,217,198,.16);
  }
  .nav-card span{display:block}
  .nc-title{font-size:13.5px;font-weight:600;color:var(--txt-1);white-space:nowrap}
  .nc-desc{font-size:11px;color:var(--txt-3);white-space:nowrap}
  .nav-card:hover{background:rgba(61,217,198,.08);border-color:rgba(61,217,198,.22);transform:translateY(-1px)}
  .nav-card.active{
    background:rgba(61,217,198,.1);
    border-color:rgba(61,217,198,.26);
    box-shadow:inset 0 -2px 0 0 var(--brand-500);
  }
  .nav-card.active .nc-title{color:#fff}

  .nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:999px;
    font-size:14px;font-weight:600;
    padding:11px 20px;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .2s var(--ease), box-shadow .25s var(--ease), background .25s var(--ease), border-color .25s var(--ease), opacity .2s var(--ease);
    white-space:nowrap;
  }
  .btn-primary{
    background:linear-gradient(90deg, var(--brand-500), var(--brand-600));
    color:var(--ink);
    box-shadow:var(--glow);
  }
  .btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 10px 38px -10px rgba(25,194,176,.68)}
  .btn-primary:active{transform:translateY(1px)}
  .btn-ghost{
    background:transparent;
    border-color:rgba(61,217,198,.3);
    color:var(--txt-1);
  }
  .btn-ghost:hover{background:rgba(61,217,198,.1);border-color:rgba(61,217,198,.5)}
  .btn-ghost:active{transform:translateY(1px)}
  .btn-sm{padding:9px 16px;font-size:13.5px}
  .btn[disabled],.btn.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}
  .link-more{
    display:inline-flex;align-items:center;gap:6px;
    font-size:13.5px;font-weight:600;color:var(--brand-400);
  }
  .link-more .arw{transition:transform .25s var(--ease)}
  .link-more:hover .arw{transform:translateX(3px)}

  .nav-toggle{
    display:none;
    width:44px;height:44px;
    align-items:center;justify-content:center;
    border-radius:12px;
    background:rgba(255,255,255,.05);
    border:1px solid var(--line);
    color:var(--txt-1);
  }

  /* 移动抽屉 */
  .drawer-mask{
    position:fixed;inset:0;z-index:80;
    background:rgba(5,15,22,.8);
    backdrop-filter:blur(4px);
    opacity:0;visibility:hidden;
    transition:opacity .3s var(--ease), visibility .3s var(--ease);
  }
  .drawer-mask.open{opacity:1;visibility:visible}
  .drawer{
    position:fixed;top:0;right:0;bottom:0;z-index:90;
    width:min(340px,86vw);
    background:linear-gradient(180deg, var(--bg-800), var(--bg-900));
    border-left:1px solid var(--line);
    padding:22px 20px 32px;
    transform:translateX(102%);
    transition:transform .34s var(--ease);
    overflow-y:auto;
  }
  .drawer.open{transform:translateX(0)}
  .drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}
  .drawer-close{
    width:40px;height:40px;border-radius:11px;
    background:rgba(255,255,255,.06);border:1px solid var(--line);
    display:inline-flex;align-items:center;justify-content:center;color:var(--txt-1);
  }
  .drawer-card{
    display:flex;align-items:center;gap:12px;
    padding:14px;
    margin-bottom:12px;
    border-radius:14px;
    background:var(--surface);
    border:1px solid var(--line);
  }
  .drawer-card.active{background:rgba(61,217,198,.1);border-color:rgba(61,217,198,.3)}
  .drawer-card .nc-icon{width:34px;height:34px;flex-shrink:0;display:inline-flex;align-items:center;justify-content:center;border-radius:10px;color:var(--brand-400);background:rgba(25,194,176,.12);border:1px solid rgba(61,217,198,.18)}
  .drawer-card .nc-title{font-size:14.5px}
  .drawer-card .nc-desc{font-size:11.5px}

  /* 通用玻璃面板 */
  .glass{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius-panel);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.05), var(--lift);
  }
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12px;line-height:1.5;
    padding:4px 10px;
    border-radius:999px;
    background:rgba(25,194,176,.14);
    color:var(--brand-400);
    border:1px solid rgba(61,217,198,.18);
    white-space:nowrap;
  }
  .badge-amber{background:rgba(255,178,92,.13);color:var(--amber);border-color:rgba(255,178,92,.24)}
  .badge-plain{background:rgba(255,255,255,.05);color:var(--txt-2);border-color:rgba(255,255,255,.09)}

  /* 面包屑 */
  .crumbs{
    display:flex;align-items:center;gap:8px;flex-wrap:wrap;
    font-size:13px;color:var(--txt-3);
    padding:22px 0 0;
  }
  .crumbs a{color:var(--txt-2);transition:color .2s var(--ease)}
  .crumbs a:hover{color:var(--brand-400)}
  .crumbs .sep{color:var(--txt-3);opacity:.6}
  .crumbs .current{color:var(--txt-3);max-width:52vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

  /* 页面头 */
  .page-head{
    position:relative;
    padding:26px 0 34px;
    overflow:hidden;
  }
  .page-head::after{
    content:"";
    position:absolute;inset:0;
    background-image:radial-gradient(circle at 10px 10px, rgba(61,217,198,.5) 1px, transparent 1.6px);
    background-size:26px 26px;
    opacity:.05;
    pointer-events:none;
  }
  .page-head h1{
    font-size:clamp(28px,4.2vw,44px);
    font-weight:700;
    line-height:1.25;
    letter-spacing:-.01em;
    max-width:900px;
    margin-top:14px;
  }
  .page-head h1 em{font-style:normal;color:var(--brand-400)}
  .page-head .lead{
    margin-top:16px;
    max-width:760px;
    font-size:15.5px;
    line-height:1.85;
    color:var(--txt-2);
  }
  .head-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}

  /* Banner */
  .banner{
    display:grid;
    grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);
    gap:26px;
    align-items:center;
    padding:28px;
    margin-bottom:34px;
    overflow:hidden;
  }
  .banner h2{
    font-size:clamp(20px,2.4vw,26px);
    font-weight:700;
    line-height:1.35;
    margin-bottom:12px;
  }
  .banner p{font-size:14.5px;line-height:1.85;color:var(--txt-2);max-width:520px}
  .banner-figure{
    position:relative;
    border-radius:var(--radius-card);
    overflow:hidden;
    aspect-ratio:16/9;
    border:1px solid var(--line);
    background:var(--bg-700);
  }
  .banner-figure img{width:100%;height:100%;object-fit:cover}
  .banner-figure::after{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg, rgba(5,15,22,.55), rgba(5,15,22,.82));
  }
  .banner-figure .cap{
    position:absolute;left:14px;bottom:12px;z-index:2;
    font-size:12.5px;color:var(--txt-2);
  }

  /* 索引条 */
  .index-bar{
    display:flex;gap:10px;flex-wrap:wrap;
    padding:8px;
    border-radius:999px;
    background:rgba(255,255,255,.035);
    border:1px solid var(--line);
    margin-bottom:36px;
  }
  .index-bar a{
    font-size:13.5px;
    padding:8px 16px;
    border-radius:999px;
    color:var(--txt-2);
    border:1px solid transparent;
    transition:all .25s var(--ease);
  }
  .index-bar a:hover{background:rgba(61,217,198,.08);color:var(--txt-1)}
  .index-bar a.on{
    background:linear-gradient(90deg, var(--brand-500), var(--brand-600));
    color:var(--ink);
    font-weight:600;
    box-shadow:var(--glow);
  }

  /* 布局 */
  .layout{
    display:grid;
    grid-template-columns:minmax(0,1fr) 300px;
    gap:32px;
    align-items:start;
    padding-bottom:12px;
  }
  .section-title{
    display:flex;align-items:center;gap:12px;
    font-size:clamp(20px,2.6vw,26px);
    font-weight:700;
    line-height:1.35;
    margin-bottom:22px;
  }
  .section-title::before{
    content:"";width:4px;height:18px;border-radius:3px;
    background:linear-gradient(180deg, var(--brand-400), var(--brand-600));
    flex-shrink:0;
  }

  .card-grid{
    display:grid;
    grid-template-columns:repeat(2, minmax(0,1fr));
    gap:18px;
  }
  .doc-card{
    position:relative;
    display:flex;flex-direction:column;
    padding:24px;
    border-radius:var(--radius-card);
    background:var(--surface);
    border:1px solid var(--line);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.04), var(--lift);
    transition:transform .3s var(--ease), border-color .3s var(--ease), background .3s var(--ease);
  }
  .doc-card:hover{transform:translateY(-2px);border-color:var(--line-strong);background:var(--surface-2)}
  .doc-num{
    font-size:13px;font-weight:700;
    color:var(--brand-400);
    letter-spacing:.14em;
    font-variant-numeric:tabular-nums;
  }
  .doc-card h3{
    font-size:18px;font-weight:600;line-height:1.4;
    margin:10px 0 10px;
  }
  .doc-card p{
    font-size:14px;line-height:1.8;color:var(--txt-2);
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
    margin-bottom:16px;
  }
  .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
  .doc-card .foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px}

  .feature-card{
    grid-column:span 2;
    display:grid;
    grid-template-columns:minmax(0,1fr) minmax(0,.85fr);
    gap:24px;
    align-items:center;
    padding:24px;
    border-radius:var(--radius-card);
    background:linear-gradient(120deg, rgba(25,194,176,.1), rgba(255,255,255,.035));
    border:1px solid rgba(61,217,198,.22);
    box-shadow:var(--lift);
  }
  .feature-card .media{
    border-radius:14px;overflow:hidden;aspect-ratio:16/9;
    border:1px solid var(--line);background:var(--bg-700);
  }
  .feature-card .media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
  .feature-card:hover .media img{transform:scale(1.03)}
  .feature-card h3{font-size:19px;font-weight:600;line-height:1.4;margin:10px 0 10px}
  .feature-card p{font-size:14px;line-height:1.8;color:var(--txt-2);margin-bottom:14px}

  /* 侧栏 */
  .sidebar{display:flex;flex-direction:column;gap:18px;position:sticky;top:100px}
  .side-card{
    padding:22px;
    border-radius:var(--radius-card);
    background:var(--surface);
    border:1px solid var(--line);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    box-shadow:inset 0 1px 0 rgba(255,255,255,.04), var(--lift);
  }
  .side-card h3{
    font-size:15px;font-weight:700;margin-bottom:14px;
    display:flex;align-items:center;gap:8px;
  }
  .side-card h3::before{
    content:"";width:3px;height:14px;border-radius:2px;
    background:var(--brand-500);
  }
  .rank-list li{
    display:flex;gap:10px;align-items:flex-start;
    padding:11px 0;
    border-bottom:1px dashed rgba(255,255,255,.07);
    font-size:13.5px;line-height:1.7;color:var(--txt-2);
    transition:color .2s var(--ease), transform .2s var(--ease);
  }
  .rank-list li:last-child{border-bottom:none}
  .rank-list li:hover{color:var(--brand-400);transform:translateX(2px)}
  .rank-list .idx{
    font-size:12px;font-weight:700;color:var(--brand-400);
    font-variant-numeric:tabular-nums;
    min-width:20px;
  }
  .tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
  .tag-cloud a{
    font-size:12.5px;padding:6px 12px;border-radius:999px;
    background:rgba(255,255,255,.05);
    border:1px solid rgba(255,255,255,.08);
    color:var(--txt-2);
    transition:all .22s var(--ease);
  }
  .tag-cloud a:hover{background:rgba(25,194,176,.14);color:var(--brand-400);border-color:rgba(61,217,198,.3)}
  .side-cta{
    background:linear-gradient(150deg, rgba(25,194,176,.18), rgba(11,37,49,.6));
    border-color:rgba(61,217,198,.28);
  }
  .side-cta p{font-size:13.5px;line-height:1.8;color:var(--txt-2);margin-bottom:16px}

  /* FAQ */
  .faq-wrap{padding:64px 0 0}
  .faq-list{display:grid;gap:14px}
  .faq-item{
    position:relative;
    border-radius:var(--radius-card);
    background:var(--surface);
    border:1px solid var(--line);
    overflow:hidden;
    transition:border-color .28s var(--ease), background .28s var(--ease);
  }
  .faq-item[open]{background:var(--surface-2);border-color:var(--line-strong)}
  .faq-item[open]::before{
    content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
    background:linear-gradient(180deg, var(--brand-400), var(--brand-600));
  }
  .faq-item summary{
    list-style:none;cursor:pointer;
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:20px 22px;
    font-size:16px;font-weight:600;line-height:1.6;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-icon{
    position:relative;width:18px;height:18px;flex-shrink:0;
    color:var(--brand-400);
    transition:transform .3s var(--ease);
  }
  .faq-icon::before,.faq-icon::after{
    content:"";position:absolute;left:50%;top:50%;
    background:currentColor;border-radius:2px;transform:translate(-50%,-50%);
  }
  .faq-icon::before{width:14px;height:2px}
  .faq-icon::after{width:2px;height:14px;transition:opacity .3s var(--ease)}
  .faq-item[open] .faq-icon{transform:rotate(90deg)}
  .faq-item[open] .faq-icon::after{opacity:0}
  .faq-body{
    padding:0 22px 22px;
    font-size:14.5px;line-height:1.9;color:var(--txt-2);
    max-width:820px;
  }

  /* CTA */
  .cta-band{
    margin:72px 0 8px;
    padding:34px;
    display:grid;
    grid-template-columns:minmax(0,1.3fr) minmax(0,.7fr);
    gap:28px;
    align-items:center;
    border-radius:var(--radius-panel);
    background:linear-gradient(120deg, rgba(25,194,176,.16), rgba(7,26,36,.7));
    border:1px solid rgba(61,217,198,.26);
    box-shadow:var(--lift);
  }
  .cta-band h2{font-size:clamp(20px,2.6vw,28px);font-weight:700;line-height:1.35;margin-bottom:12px}
  .cta-band p{font-size:14.5px;line-height:1.85;color:var(--txt-2);max-width:560px;margin-bottom:20px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px}
  .cta-figure{
    border-radius:var(--radius-card);overflow:hidden;aspect-ratio:4/3;
    border:1px solid var(--line);background:var(--bg-700);
  }
  .cta-figure img{width:100%;height:100%;object-fit:cover}

  /* 页脚 */
  .site-footer{
    margin-top:88px;
    border-top:1px solid var(--line);
    background:linear-gradient(180deg, rgba(7,26,36,.85), var(--bg-900));
    position:relative;
    z-index:1;
  }
  .footer-title{
    font-size:14px;font-weight:600;color:var(--brand-400);
    margin-bottom:14px;letter-spacing:.02em;
  }
  .footer-link{
    display:block;
    font-size:14px;color:var(--txt-2);
    padding:5px 0;
    transition:color .22s var(--ease), transform .22s var(--ease);
  }
  .footer-link:hover{color:var(--txt-1);transform:translateX(2px)}
  .footer-bottom{
    border-top:1px solid var(--line);
    padding:18px 0 26px;
    display:flex;flex-wrap:wrap;gap:10px;
    align-items:center;justify-content:space-between;
    font-size:13px;color:var(--txt-3);
  }
  .footer-bottom a{color:var(--txt-2);transition:color .2s var(--ease)}
  .footer-bottom a:hover{color:var(--brand-400)}

  /* 回到顶部 */
  .to-top{
    position:fixed;right:20px;bottom:24px;z-index:70;
    width:46px;height:46px;border-radius:50%;
    display:inline-flex;align-items:center;justify-content:center;
    background:linear-gradient(150deg, rgba(25,194,176,.9), rgba(14,158,146,.9));
    color:var(--ink);
    box-shadow:var(--glow);
    opacity:0;visibility:hidden;transform:translateY(10px);
    transition:all .3s var(--ease);
  }
  .to-top.show{opacity:1;visibility:visible;transform:translateY(0)}
  .to-top:hover{filter:brightness(1.08);transform:translateY(-2px)}

  /* 入场动效 */
  .reveal{opacity:0;transform:translateY(12px)}
  .reveal.in{opacity:1;transform:none;transition:opacity .4s var(--ease), transform .4s var(--ease)}

  @media (prefers-reduced-motion: reduce){
    .reveal{opacity:1 !important;transform:none !important;transition:none !important}
    *{animation-duration:.001ms !important;transition-duration:.001ms !important}
  }

  /* 响应式 */
  @media (max-width:1023px){
    .nav-toggle{display:inline-flex}
    .nav-panel{display:none}
    .nav-cta{display:none}
    .nav-shell{justify-content:space-between}
    .layout{grid-template-columns:minmax(0,1fr)}
    .sidebar{position:static}
    .card-grid{grid-template-columns:repeat(2, minmax(0,1fr))}
    .feature-card{grid-template-columns:minmax(0,1fr);}
    .feature-card .media{order:-1}
    .cta-band{grid-template-columns:minmax(0,1fr)}
    .cta-figure{max-width:420px}
  }
  @media (max-width:767px){
    .banner{grid-template-columns:minmax(0,1fr);padding:22px}
    .card-grid{grid-template-columns:minmax(0,1fr)}
    .feature-card{grid-column:span 1}
    .page-head{padding:20px 0 26px}
    .page-head .lead{font-size:14.5px}
    .index-bar{border-radius:18px;overflow-x:auto;flex-wrap:nowrap;scrollbar-width:none}
    .index-bar::-webkit-scrollbar{display:none}
    .index-bar a{white-space:nowrap}
    .faq-wrap{padding-top:48px}
    .cta-band{padding:24px;margin-top:52px}
    .site-footer{margin-top:64px}
    .brand-sub{display:none}
    .to-top{right:14px;bottom:16px}
  }
  @media (max-width:520px){
    body{font-size:15.5px}
    .doc-card,.side-card{padding:20px}
    .faq-item summary{font-size:15px;padding:18px}
    .footer-bottom{justify-content:flex-start}
    .nav-shell{min-height:68px}
    .brand-name{font-size:14.5px}
  }

/* roulang page: article */
:root{
  --bg-900:#050F16;
  --bg-800:#071A24;
  --bg-700:#0B2531;
  --brand-400:#3DD9C6;
  --brand-500:#19C2B0;
  --brand-600:#0E9E92;
  --amber:#FFB25C;
  --txt-1:#EAF4F6;
  --txt-2:#9FB6C2;
  --txt-3:#6B8390;
  --inv:#05121A;
  --ok:#4ADE80;
  --err:#F87171;
  --warn:#FBBF24;
  --line:rgba(61,217,198,.14);
  --line-strong:rgba(61,217,198,.38);
  --card:rgba(255,255,255,.045);
  --r-card:18px;
  --r-panel:22px;
  --r-sm:12px;
  --glow:0 8px 30px -10px rgba(25,194,176,.5);
  --lift:0 18px 40px -24px rgba(0,0,0,.75);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  padding:0;
  background:var(--bg-900);
  background-image:
    radial-gradient(1000px 520px at 12% -8%, rgba(25,194,176,.13), transparent 62%),
    radial-gradient(760px 420px at 92% 4%, rgba(255,178,92,.06), transparent 60%);
  color:var(--txt-1);
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,Inter,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
::selection{background:rgba(25,194,176,.35);color:#fff}
:focus-visible{outline:2px solid var(--brand-400);outline-offset:2px;border-radius:6px}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg-800)}
::-webkit-scrollbar-thumb{background:rgba(25,194,176,.3);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(25,194,176,.5)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

/* ============ 玻璃面板 ============ */
.glass{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  transition:border-color .3s var(--ease),transform .3s var(--ease),box-shadow .3s var(--ease);
}
.glass:hover{border-color:var(--line-strong)}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;padding:12px 24px;font-size:14.5px;font-weight:600;
  border:1px solid transparent;cursor:pointer;
  transition:all .25s var(--ease);white-space:nowrap;
}
.btn-primary{background:linear-gradient(90deg,#19C2B0,#0E9E92);color:var(--inv);box-shadow:var(--glow)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 14px 36px -10px rgba(25,194,176,.72)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary[disabled],.btn-primary.disabled{opacity:.45;box-shadow:none;cursor:not-allowed;transform:none}
.btn-ghost{background:transparent;border-color:rgba(61,217,198,.3);color:var(--txt-1)}
.btn-ghost:hover{background:rgba(61,217,198,.1);border-color:var(--line-strong);transform:translateY(-1px)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:9px 18px;font-size:13.5px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--brand-400)}
.link-arrow svg{transition:transform .25s var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(7,26,36,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.scrolled{background:rgba(5,15,22,.93);box-shadow:0 14px 34px -22px rgba(25,194,176,.75)}
.nav-shell{display:flex;align-items:center;gap:16px;padding:12px 0}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(25,194,176,.22),rgba(14,158,146,.1));
  border:1px solid var(--line);color:var(--brand-400);flex:0 0 auto;
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:15px;font-weight:700;letter-spacing:-.01em;color:var(--txt-1)}
.brand-sub{font-size:11px;color:var(--txt-3);letter-spacing:.04em}
.nav-panel{
  display:flex;align-items:center;gap:6px;flex:1 1 auto;min-width:0;
  background:rgba(255,255,255,.04);border:1px solid var(--line);
  border-radius:20px;padding:6px;overflow-x:auto;scrollbar-width:none;
}
.nav-panel::-webkit-scrollbar{display:none}
.nav-card{
  position:relative;display:flex;align-items:center;gap:9px;flex:0 0 auto;
  padding:8px 14px;border-radius:14px;color:var(--txt-2);
  transition:background .25s var(--ease),color .25s var(--ease);
}
.nav-card .nc-icon{color:var(--brand-400);display:grid;place-items:center}
.nav-card .nc-title{display:block;font-size:13.5px;font-weight:600;color:var(--txt-1);white-space:nowrap}
.nav-card .nc-desc{display:block;font-size:11.5px;color:var(--txt-3);white-space:nowrap}
.nav-card:hover{background:rgba(61,217,198,.09)}
.nav-card:hover .nc-title{color:var(--brand-400)}
.nav-card.active{background:rgba(61,217,198,.12)}
.nav-card.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#3DD9C6,#0E9E92);
}
.nav-cta{display:flex;align-items:center;gap:10px;flex:0 0 auto;margin-left:auto}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--line);
  background:rgba(255,255,255,.05);cursor:pointer;flex-direction:column;align-items:center;justify-content:center;gap:4px;
}
.nav-toggle span{display:block;width:17px;height:1.6px;background:var(--brand-400);border-radius:2px;transition:transform .25s var(--ease),opacity .25s var(--ease)}
@media (max-width:1023px){
  .nav-panel{display:none}
  .nav-toggle{display:flex}
  .nav-shell{padding:10px 0}
}
@media (max-width:520px){
  .brand-sub{display:none}
  .brand-name{font-size:13.5px;max-width:168px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .nav-cta .btn{padding:10px 16px;font-size:13px}
}

/* ============ 移动端抽屉 ============ */
.drawer-mask{position:fixed;inset:0;background:rgba(5,15,22,.8);z-index:70;opacity:0;pointer-events:none;transition:opacity .3s var(--ease)}
.drawer-mask.open{opacity:1;pointer-events:auto}
.nav-drawer{
  position:fixed;top:0;right:0;height:100%;width:min(86vw,360px);z-index:80;
  background:rgba(7,26,36,.97);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);
  border-left:1px solid var(--line);padding:22px 20px 44px;overflow-y:auto;
  transform:translateX(105%);transition:transform .38s var(--ease);
}
.nav-drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-title{font-size:14px;font-weight:700;color:var(--brand-400);letter-spacing:.05em}
.drawer-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.05);cursor:pointer;color:var(--txt-2)}
.drawer-close:hover{color:var(--brand-400);border-color:var(--line-strong)}
.drawer-card{
  display:flex;align-items:center;gap:12px;padding:14px 16px;margin-bottom:10px;
  border-radius:16px;background:rgba(255,255,255,.045);border:1px solid var(--line);
  transition:border-color .25s var(--ease),background .25s var(--ease);
}
.drawer-card:hover,.drawer-card.active{border-color:var(--line-strong);background:rgba(61,217,198,.1)}
.drawer-card .nc-icon{color:var(--brand-400)}
.drawer-card .nc-title{display:block;font-size:14px;font-weight:600;color:var(--txt-1)}
.drawer-card .nc-desc{display:block;font-size:12px;color:var(--txt-3)}

/* ============ 文章头部 ============ */
.article-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);background:var(--bg-800)}
.article-hero::before{
  content:"";position:absolute;inset:0;opacity:.5;pointer-events:none;
  background-image:radial-gradient(circle at 50% 100%, rgba(61,217,198,.07) 0 20%, transparent 21%);
  background-size:72px 36px;
}
.article-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg, rgba(5,15,22,.35), rgba(5,15,22,.9));
}
.article-hero .container{position:relative;z-index:2;padding-top:26px;padding-bottom:44px}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--txt-3);flex-wrap:wrap;margin-bottom:18px}
.breadcrumb a{color:var(--txt-2)}
.breadcrumb a:hover{color:var(--brand-400)}
.breadcrumb .sep{color:var(--txt-3);opacity:.7}
.breadcrumb .current{color:var(--txt-3);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-hero h1{
  font-size:clamp(26px,4vw,42px);font-weight:700;line-height:1.28;letter-spacing:-.01em;
  max-width:880px;
}
.meta-row{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:20px;font-size:13px;color:var(--txt-3)}
.meta-row .meta-item{display:inline-flex;align-items:center;gap:6px;font-variant-numeric:tabular-nums}
.meta-dot{width:4px;height:4px;border-radius:50%;background:var(--line-strong)}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:4px 11px;border-radius:999px;
  font-size:12px;font-weight:600;background:rgba(25,194,176,.14);color:var(--brand-400);
}
.chip-amber{background:rgba(255,178,92,.14);color:var(--amber)}

/* ============ 布局 ============ */
.page-body{padding:44px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:36px;justify-content:center}
@media (min-width:1024px){
  .article-layout{grid-template-columns:minmax(0,760px) 300px;gap:56px;align-items:start}
}
.article-main{min-width:0}
.article-side{display:flex;flex-direction:column;gap:20px}
@media (min-width:1024px){.article-side{position:sticky;top:92px}}

/* ============ 正文排版 ============ */
.article-body{font-size:17px;line-height:1.9;color:var(--txt-1)}
.article-body > *:first-child{margin-top:0}
.article-body p{margin:0 0 20px}
.article-body h2{
  position:relative;font-size:clamp(20px,2.4vw,26px);font-weight:700;line-height:1.35;
  margin:44px 0 18px;padding-left:16px;
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.34em;width:4px;height:18px;border-radius:2px;
  background:linear-gradient(180deg,#3DD9C6,#0E9E92);
}
.article-body h3{font-size:19px;font-weight:600;line-height:1.4;margin:32px 0 14px;color:var(--txt-1)}
.article-body h4{font-size:16.5px;font-weight:600;margin:24px 0 12px;color:var(--brand-400)}
.article-body ul{margin:0 0 22px;padding-left:0;list-style:none}
.article-body ul li{position:relative;padding-left:18px;margin-bottom:10px}
.article-body ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:6px;height:6px;border-radius:1px;background:var(--brand-500);
}
.article-body ol{margin:0 0 22px;padding-left:20px}
.article-body ol li{margin-bottom:10px;padding-left:4px}
.article-body ol li::marker{color:var(--brand-500);font-weight:700}
.article-body blockquote{
  margin:26px 0;padding:16px 20px;border-left:3px solid var(--brand-500);
  background:var(--card);border-radius:0 14px 14px 0;color:var(--txt-2);backdrop-filter:blur(12px);
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body a{color:var(--txt-1);border-bottom:1px dashed var(--brand-500);padding-bottom:1px}
.article-body a:hover{color:var(--brand-400);border-bottom-style:solid}
.article-body img{border-radius:14px;margin:24px 0;width:100%;object-fit:cover}
.article-body figure{margin:26px 0}
.article-body figure img{margin:0}
.article-body figcaption{font-size:13px;color:var(--txt-3);text-align:center;margin-top:10px}
.article-body table{width:100%;border-collapse:collapse;margin:26px 0;font-size:15px;display:block;overflow-x:auto}
.article-body th{
  background:rgba(25,194,176,.12);color:var(--txt-1);font-weight:600;
  padding:12px 14px;text-align:left;white-space:nowrap;
}
.article-body td{padding:12px 14px;border-bottom:1px solid var(--line);color:var(--txt-2)}
.article-body tr:nth-child(even) td{background:rgba(255,255,255,.025)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:36px 0}
.article-body strong{color:#fff;font-weight:600}

/* ============ 空态 ============ */
.empty-state{
  border:1px dashed rgba(61,217,198,.35);border-radius:var(--r-panel);
  padding:48px 24px;text-align:center;background:rgba(255,255,255,.03);
}
.empty-state .es-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:16px;display:grid;place-items:center;
  border:1px solid var(--line);color:var(--brand-400);background:rgba(25,194,176,.08);
}
.empty-state h2{font-size:19px;font-weight:700;margin-bottom:10px}
.empty-state p{font-size:14.5px;color:var(--txt-2);margin-bottom:22px}

/* ============ 标签 ============ */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:36px 0 8px;padding-top:26px;border-top:1px solid var(--line)}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;font-size:12.5px;
  background:rgba(255,255,255,.05);border:1px solid var(--line);color:var(--txt-2);
  transition:all .25s var(--ease);
}
.tag:hover{color:var(--brand-400);border-color:var(--line-strong);background:rgba(61,217,198,.1)}

/* ============ 上下篇 ============ */
.nav-links{display:grid;grid-template-columns:1fr;gap:16px;margin-top:34px}
@media (min-width:640px){.nav-links{grid-template-columns:1fr 1fr}}
.nav-link-card{
  display:flex;flex-direction:column;gap:8px;padding:20px 22px;border-radius:var(--r-card);
  background:var(--card);border:1px solid var(--line);transition:all .3s var(--ease);min-height:112px;
}
.nav-link-card:hover{border-color:var(--line-strong);transform:translateY(-2px);box-shadow:var(--lift)}
.nav-link-card .nl-label{font-size:12px;color:var(--txt-3);letter-spacing:.05em}
.nav-link-card .nl-title{font-size:15.5px;font-weight:600;line-height:1.5;color:var(--txt-1)}
.nav-link-card .nl-arrow{color:var(--brand-400);display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;margin-top:auto}
.nav-link-card.next{align-items:flex-end;text-align:right}

/* ============ 侧栏 ============ */
.side-panel{padding:22px}
.side-title{
  display:flex;align-items:center;gap:8px;font-size:14px;font-weight:700;color:var(--txt-1);margin-bottom:14px;
}
.side-title::before{content:"";width:4px;height:15px;border-radius:2px;background:linear-gradient(180deg,#3DD9C6,#0E9E92)}
.side-list{display:flex;flex-direction:column;gap:2px}
.side-link{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:10px 12px;border-radius:12px;font-size:13.5px;color:var(--txt-2);
  transition:all .25s var(--ease);
}
.side-link:hover{background:rgba(61,217,198,.1);color:var(--txt-1);transform:translateX(2px)}
.side-link .sl-tag{font-size:11px;color:var(--brand-400)}
.side-note{font-size:13px;line-height:1.85;color:var(--txt-2)}
.side-note strong{color:var(--brand-400);font-weight:600}
.side-cta{padding:24px;text-align:center;background:linear-gradient(160deg,rgba(25,194,176,.14),rgba(255,255,255,.03))}
.side-cta h3{font-size:16px;font-weight:700;margin-bottom:8px}
.side-cta p{font-size:13px;color:var(--txt-2);margin-bottom:16px;line-height:1.8}

/* ============ 相关推荐 ============ */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:84px 0}}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.section-title{position:relative;font-size:clamp(21px,2.6vw,28px);font-weight:700;line-height:1.3;padding-left:16px}
.section-title::before{
  content:"";position:absolute;left:0;top:.32em;width:4px;height:18px;border-radius:2px;
  background:linear-gradient(180deg,#3DD9C6,#0E9E92);
}
.section-sub{font-size:14px;color:var(--txt-2);margin-top:8px;max-width:660px;line-height:1.8}
.card-grid{display:grid;grid-template-columns:1fr;gap:20px}
@media (min-width:768px){.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.card-grid.three{grid-template-columns:repeat(3,minmax(0,1fr))}}
.content-card{
  display:flex;flex-direction:column;overflow:hidden;border-radius:var(--r-card);
  background:var(--card);border:1px solid var(--line);transition:all .35s var(--ease);
}
.content-card:hover{transform:translateY(-2px);border-color:var(--line-strong);box-shadow:var(--lift)}
.cc-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:rgba(255,255,255,.04)}
.cc-cover img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .4s var(--ease)}
.content-card:hover .cc-cover img{transform:scale(1.03)}
.cc-badge{
  position:absolute;top:12px;left:12px;padding:4px 11px;border-radius:999px;font-size:11.5px;font-weight:600;
  background:rgba(5,15,22,.72);border:1px solid var(--line);color:var(--brand-400);
  backdrop-filter:blur(8px);
}
.cc-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1 1 auto}
.cc-title{font-size:16px;font-weight:600;line-height:1.5;color:var(--txt-1)}
.cc-desc{font-size:13.5px;color:var(--txt-2);line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.cc-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}
.cc-time{font-size:12.5px;color:var(--txt-3);font-variant-numeric:tabular-nums}
.cc-link{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;color:var(--brand-400)}
.cc-link svg{transition:transform .25s var(--ease)}
.content-card:hover .cc-link svg{transform:translateX(3px)}
.img-placeholder{
  width:100%;height:100%;display:grid;place-items:center;color:var(--brand-400);
  background:rgba(25,194,176,.06);border:1px dashed rgba(61,217,198,.3);
}

/* ============ FAQ ============ */
.faq-list{display:flex;flex-direction:column;gap:14px}
.faq-item{
  position:relative;border-radius:var(--r-card);background:var(--card);border:1px solid var(--line);
  padding:0 22px;transition:all .3s var(--ease);overflow:hidden;
}
.faq-item::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,#3DD9C6,#0E9E92);opacity:0;transition:opacity .3s var(--ease);
}
.faq-item[open]{background:rgba(255,255,255,.07);border-color:var(--line-strong)}
.faq-item[open]::before{opacity:1}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 0;font-size:15.5px;font-weight:600;color:var(--txt-1);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-icon{
  position:relative;width:18px;height:18px;flex:0 0 auto;border-radius:50%;
  border:1px solid var(--line-strong);transition:transform .3s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand-400);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:8px;height:1.6px}
.faq-icon::after{width:1.6px;height:8px;transition:opacity .3s var(--ease)}
.faq-item[open] .faq-icon{transform:rotate(90deg);background:rgba(255,178,92,.16);border-color:rgba(255,178,92,.45)}
.faq-item[open] .faq-icon::after{opacity:0}
.faq-answer{padding:0 0 20px;font-size:14.5px;line-height:1.9;color:var(--txt-2);border-top:1px solid var(--line);padding-top:16px}

/* ============ CTA ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-panel);border:1px solid var(--line);
  background:linear-gradient(120deg,rgba(25,194,176,.16),rgba(255,255,255,.03) 58%);
  padding:40px 28px;
}
.cta-band::after{
  content:"";position:absolute;right:-60px;bottom:-80px;width:260px;height:260px;border-radius:50%;
  background:radial-gradient(circle,rgba(25,194,176,.22),transparent 66%);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:26px;align-items:center}
@media (min-width:900px){.cta-inner{grid-template-columns:1.4fr .9fr;gap:40px}}
.cta-band h2{font-size:clamp(21px,2.6vw,28px);font-weight:700;line-height:1.35;margin-bottom:12px}
.cta-band p{font-size:14.5px;color:var(--txt-2);line-height:1.9;max-width:620px;margin-bottom:22px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-visual{
  border-radius:var(--r-card);border:1px solid var(--line);overflow:hidden;aspect-ratio:4/3;
  background:rgba(5,15,22,.6);
}
.cta-visual img{width:100%;height:100%;object-fit:cover;border-radius:0;opacity:.9}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--line);background:var(--bg-800)}
.footer-title{font-size:14px;font-weight:600;color:var(--brand-400);margin-bottom:14px;letter-spacing:.03em}
.footer-link{display:block;font-size:14px;color:var(--txt-2);margin-bottom:10px;transition:all .25s var(--ease)}
.footer-link:hover{color:var(--txt-1);transform:translateX(2px)}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;
  padding:18px 0 26px;border-top:1px solid var(--line);font-size:13px;color:var(--txt-3);
}
.footer-bottom a{color:var(--txt-2)}
.footer-bottom a:hover{color:var(--brand-400)}

/* ============ 回到顶部 ============ */
.to-top{
  position:fixed;right:20px;bottom:24px;width:46px;height:46px;border-radius:50%;z-index:65;
  display:grid;place-items:center;cursor:pointer;color:var(--inv);
  background:linear-gradient(135deg,#3DD9C6,#0E9E92);box-shadow:var(--glow);border:none;
  opacity:0;pointer-events:none;transform:translateY(12px);
  transition:all .3s var(--ease);
}
.to-top.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.to-top:hover{filter:brightness(1.08);transform:translateY(-2px)}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1!important;transform:none!important}
  html{scroll-behavior:auto}
}

/* roulang page: category2 */
:root{
  --bg-900:#050F16;
  --bg-800:#071A24;
  --bg-700:#0B2531;
  --brand:#19C2B0;
  --brand-400:#3DD9C6;
  --brand-600:#0E9E92;
  --amber:#FFB25C;
  --ok:#4ADE80;
  --err:#F87171;
  --warn:#FBBF24;
  --txt-1:#EAF4F6;
  --txt-2:#9FB6C2;
  --txt-3:#6B8390;
  --txt-invert:#05121A;
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(255,255,255,.07);
  --line:rgba(61,217,198,.14);
  --line-hover:rgba(61,217,198,.38);
  --line-soft:rgba(255,255,255,.08);
  --r-card:18px;
  --r-panel:22px;
  --r-sm:12px;
  --shadow-rim:inset 0 0 0 1px rgba(61,217,198,.14);
  --shadow-glow:0 8px 30px -10px rgba(25,194,176,.5);
  --shadow-lift:0 18px 40px -24px rgba(0,0,0,.75);
  --ease:cubic-bezier(.22,.61,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--txt-1);
  font-family:"HarmonyOS Sans","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
::selection{background:rgba(25,194,176,.32);color:#fff}
::-webkit-scrollbar{width:8px;height:8px}
::-webkit-scrollbar-track{background:var(--bg-800)}
::-webkit-scrollbar-thumb{background:rgba(25,194,176,.3);border-radius:999px}
::-webkit-scrollbar-thumb:hover{background:rgba(25,194,176,.5)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}

:focus-visible{outline:2px solid var(--brand-400);outline-offset:2px;border-radius:6px}

.glass{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-panel);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  box-shadow:var(--shadow-lift);
  transition:border-color .35s var(--ease),transform .35s var(--ease),background .35s var(--ease);
}
.glass:hover{border-color:var(--line-hover)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;border:1px solid transparent;cursor:pointer;
  font-size:15px;font-weight:600;padding:0 24px;height:48px;
  transition:all .3s var(--ease);white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(90deg,var(--brand) 0%,var(--brand-600) 100%);
  color:var(--txt-invert);
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px);box-shadow:0 12px 36px -8px rgba(25,194,176,.6)}
.btn-primary:active{transform:translateY(1px)}
.btn-primary[disabled],.btn-primary.is-disabled{opacity:.45;box-shadow:none;cursor:not-allowed}
.btn-ghost{
  background:transparent;border-color:rgba(61,217,198,.3);color:var(--txt-1);
}
.btn-ghost:hover{background:rgba(61,217,198,.1);border-color:var(--line-hover)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{height:40px;font-size:14px;padding:0 18px}
.link-more{
  display:inline-flex;align-items:center;gap:6px;color:var(--brand-400);
  font-size:14px;font-weight:600;transition:color .3s var(--ease);
}
.link-more i,.link-more svg{transition:transform .3s var(--ease)}
.link-more:hover{color:var(--brand)}
.link-more:hover i,.link-more:hover svg{transform:translateX(3px)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,26,36,.72);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line);
  transition:background .3s var(--ease),box-shadow .3s var(--ease);
}
.site-header.is-scrolled{
  background:rgba(5,15,22,.92);
  box-shadow:0 12px 34px -22px rgba(25,194,176,.65);
}
.nav-shell{display:flex;align-items:center;gap:18px;height:74px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:36px;height:36px;border-radius:12px;flex:0 0 36px;
  display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(150deg,rgba(25,194,176,.28),rgba(14,158,146,.12));
  border:1px solid var(--line);color:var(--brand-400);
  box-shadow:0 6px 18px -10px rgba(25,194,176,.6);
}
.brand-text{display:flex;flex-direction:column;line-height:1.2}
.brand-name{font-size:15.5px;font-weight:700;letter-spacing:.2px;color:var(--txt-1)}
.brand-sub{font-size:11px;color:var(--txt-3);letter-spacing:.6px}

.nav-panel{
  display:flex;align-items:center;gap:8px;flex:1;
  padding:6px;border-radius:16px;
  background:var(--glass);border:1px solid var(--line);
}
.nav-card{
  display:flex;align-items:center;gap:9px;flex:1;
  padding:8px 12px;border-radius:12px;
  border:1px solid transparent;border-bottom:2px solid transparent;
  transition:all .28s var(--ease);
}
.nav-card:hover{background:rgba(61,217,198,.08);border-color:var(--line)}
.nav-card.active{
  background:rgba(61,217,198,.12);
  border-bottom:2px solid var(--brand);
}
.nc-icon{
  width:28px;height:28px;flex:0 0 28px;border-radius:9px;
  display:inline-flex;align-items:center;justify-content:center;
  color:var(--brand-400);
  background:rgba(25,194,176,.12);
}
.nc-title{display:block;font-size:13.5px;font-weight:600;color:var(--txt-1)}
.nc-desc{display:block;font-size:11px;color:var(--txt-3);white-space:nowrap}
.nav-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:12px;background:var(--glass);border:1px solid var(--line);
  color:var(--txt-1);cursor:pointer;
}
.nav-toggle:hover{border-color:var(--line-hover)}

.drawer-mask{
  position:fixed;inset:0;background:rgba(5,15,22,.8);z-index:90;
  opacity:0;visibility:hidden;transition:opacity .3s var(--ease),visibility .3s;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:min(86vw,360px);z-index:95;
  background:linear-gradient(180deg,var(--bg-800),var(--bg-900));
  border-left:1px solid var(--line);
  transform:translateX(102%);transition:transform .36s var(--ease);
  padding:22px 20px 40px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.drawer-close{
  width:40px;height:40px;border-radius:12px;border:1px solid var(--line);
  background:var(--glass);color:var(--txt-1);cursor:pointer;
  display:inline-flex;align-items:center;justify-content:center;
}
.drawer-list{display:flex;flex-direction:column;gap:10px}
.drawer-card{
  display:flex;align-items:center;gap:12px;padding:14px;
  border-radius:14px;background:var(--glass);border:1px solid var(--line);
}
.drawer-card.active{border-color:var(--line-hover);background:rgba(61,217,198,.12)}
@media (max-width:1023px){
  .nav-panel{display:none}
  .nav-toggle{display:inline-flex}
  .nav-shell{height:68px;justify-content:space-between}
}
@media (max-width:520px){
  .nav-cta .btn-cta{display:none}
  .brand-sub{display:none}
}

/* ---------- 面包屑 ---------- */
.crumb{padding:22px 0 0;font-size:13px;color:var(--txt-3)}
.crumb a{color:var(--txt-2);transition:color .25s var(--ease)}
.crumb a:hover{color:var(--brand-400)}
.crumb span.sep{margin:0 8px;color:var(--txt-3)}
.crumb .cur{color:var(--txt-1)}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:44px 0 72px;
  background:
    radial-gradient(900px 420px at 88% -10%,rgba(25,194,176,.18),transparent 62%),
    radial-gradient(700px 380px at 5% 20%,rgba(14,158,146,.12),transparent 65%),
    var(--bg-900);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.05;
  background-image:radial-gradient(circle at 12px 12px,rgba(61,217,198,.9) 1.4px,transparent 1.5px);
  background-size:26px 26px;
}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:999px;
  font-size:12px;color:var(--brand-400);letter-spacing:.6px;
  background:rgba(25,194,176,.12);border:1px solid var(--line);
}
h1{
  font-size:clamp(28px,4.2vw,44px);font-weight:700;line-height:1.25;letter-spacing:-.01em;
  margin:16px 0 14px;
}
h1 .hl{
  background:linear-gradient(90deg,var(--brand-400),var(--brand-600));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{font-size:16.5px;color:var(--txt-2);max-width:560px;line-height:1.8}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}
.hero-badges{display:flex;flex-wrap:wrap;gap:18px;margin-top:26px}
.mini-badge{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;color:var(--txt-2)}
.mini-badge i{color:var(--brand-400);font-size:12px}

.hero-visual{position:relative}
.hero-media{
  position:relative;border-radius:var(--r-panel);overflow:hidden;
  aspect-ratio:4/3;border:1px solid var(--line);
  box-shadow:var(--shadow-lift);
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(5,15,22,.35),rgba(5,15,22,.82));
}
.hero-media-tip{
  position:absolute;left:20px;bottom:18px;right:20px;z-index:2;
}
.hero-media-tip .t1{font-size:13px;color:var(--brand-400);letter-spacing:.6px}
.hero-media-tip .t2{font-size:18px;font-weight:700;color:#fff;margin-top:4px}
.hero-side{
  position:absolute;right:-6px;bottom:-24px;width:210px;padding:16px;
  border-radius:16px;background:rgba(11,37,49,.86);
  border:1px solid var(--line-hover);backdrop-filter:blur(14px);
  box-shadow:var(--shadow-lift);
}
.hero-side-row{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--txt-2)}
.hero-side-row + .hero-side-row{margin-top:10px;padding-top:10px;border-top:1px solid var(--line-soft)}
.hero-side-val{color:var(--brand-400);font-weight:700;font-variant-numeric:tabular-nums}

/* ---------- 统计条 ---------- */
.stat-bar{
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  margin-top:52px;border-radius:var(--r-card);overflow:hidden;
  border:1px solid var(--line);background:rgba(255,255,255,.05);
}
.stat-cell{background:rgba(7,26,36,.85);padding:22px 24px;transition:background .3s var(--ease)}
.stat-cell:hover{background:rgba(11,37,49,.95)}
.stat-num{
  font-size:clamp(26px,3.4vw,38px);font-weight:700;font-variant-numeric:tabular-nums;
  background:linear-gradient(90deg,var(--brand-400),var(--brand-600));
  -webkit-background-clip:text;background-clip:text;color:transparent;line-height:1.2;
}
.stat-desc{font-size:12px;color:var(--txt-3);margin-top:6px;letter-spacing:.3px}

/* ---------- 通用板块 ---------- */
section{padding:96px 0}
@media (max-width:1024px){section{padding:72px 0}}
@media (max-width:640px){section{padding:56px 0}}
.sec-alt{background:var(--bg-800);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.sec-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-bottom:40px}
h2{
  font-size:clamp(22px,3vw,32px);font-weight:700;line-height:1.3;position:relative;padding-left:16px;
}
h2::before{
  content:"";position:absolute;left:0;top:.28em;width:4px;height:18px;
  border-radius:2px;background:linear-gradient(180deg,var(--brand-400),var(--brand-600));
}
.sec-desc{font-size:14.5px;color:var(--txt-2);margin-top:12px;padding-left:16px;max-width:760px}

/* ---------- 时间轴（编号流） ---------- */
.timeline{position:relative;margin-top:8px}
.timeline::before{
  content:"";position:absolute;left:39px;top:14px;bottom:14px;width:1px;
  background:linear-gradient(180deg,rgba(61,217,198,.5),rgba(61,217,198,.12) 70%,transparent);
}
.tl-item{
  position:relative;display:grid;grid-template-columns:80px 1fr;gap:32px;
  padding:30px 0 34px;border-bottom:1px solid var(--line-soft);
}
.tl-item:last-child{border-bottom:0}
.tl-index{position:relative;display:flex;justify-content:center;padding-top:2px}
.tl-num{
  font-size:38px;font-weight:700;line-height:1;font-variant-numeric:tabular-nums;
  color:transparent;-webkit-text-stroke:1.4px rgba(61,217,198,.6);
  background:rgba(5,15,22,.9);padding:0 6px;position:relative;z-index:2;
}
.tl-node{
  position:absolute;left:50%;top:-6px;transform:translateX(-50%);
  width:8px;height:8px;border-radius:50%;background:var(--amber);
  box-shadow:0 0 0 4px rgba(255,178,92,.14);
}
.tl-body{max-width:860px}
.tl-title{font-size:19px;font-weight:600;line-height:1.45;margin-bottom:8px}
.tl-text{font-size:15px;color:var(--txt-2);line-height:1.85;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.tl-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:14px}
.tl-tags{display:flex;flex-wrap:wrap;gap:8px}
.tag{
  display:inline-flex;align-items:center;font-size:12px;padding:4px 10px;border-radius:999px;
  background:rgba(25,194,176,.14);color:var(--brand-400);border:1px solid rgba(25,194,176,.18);
}
.tag-amber{background:rgba(255,178,92,.12);color:var(--amber);border-color:rgba(255,178,92,.2)}
.tl-more{margin-left:auto}
@media (max-width:768px){
  .timeline::before{left:23px}
  .tl-item{grid-template-columns:48px 1fr;gap:18px;padding:24px 0 28px}
  .tl-num{font-size:28px}
  .tl-more{margin-left:0}
}

/* ---------- 对照表 ---------- */
.table-panel{padding:26px;border-radius:var(--r-panel)}
.table-scroll{overflow-x:auto;border-radius:14px;border:1px solid var(--line-soft)}
table.compare{width:100%;min-width:620px;border-collapse:collapse;font-size:14.5px}
table.compare th{
  background:rgba(25,194,176,.12);color:var(--brand-400);
  text-align:left;font-weight:600;font-size:13.5px;letter-spacing:.4px;
  padding:14px 18px;border-bottom:1px solid var(--line);
}
table.compare td{padding:14px 18px;color:var(--txt-2);border-bottom:1px solid var(--line-soft);line-height:1.8}
table.compare tbody tr:nth-child(odd){background:rgba(255,255,255,.02)}
table.compare tbody tr:hover{background:rgba(61,217,198,.06)}
table.compare td:first-child{color:var(--txt-1);font-weight:600}
.table-note{font-size:12.5px;color:var(--txt-3);margin-top:14px}

/* ---------- FAQ ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;margin-top:8px}
.faq-item{
  border-radius:var(--r-card);background:var(--glass);border:1px solid var(--line);
  overflow:hidden;transition:border-color .3s var(--ease),background .3s var(--ease);
}
.faq-item[open]{background:rgba(61,217,198,.07);border-color:var(--line-hover)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 22px;display:flex;align-items:center;gap:14px;
  font-size:16px;font-weight:600;position:relative;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{
  content:"";position:absolute;left:0;top:14px;bottom:14px;width:3px;border-radius:2px;
  background:var(--brand);opacity:0;transition:opacity .3s var(--ease);
}
.faq-item[open] summary::before{opacity:1}
.faq-icon{
  margin-left:auto;width:26px;height:26px;flex:0 0 26px;border-radius:50%;
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);color:var(--brand-400);font-size:12px;
  transition:transform .3s var(--ease),background .3s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(90deg);background:rgba(25,194,176,.16)}
.faq-body{padding:0 22px 20px 22px;font-size:14.8px;color:var(--txt-2);line-height:1.9}

/* ---------- 相关分类卡 ---------- */
.rel-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.rel-card{
  display:block;padding:24px;border-radius:var(--r-card);background:var(--glass);
  border:1px solid var(--line);transition:all .35s var(--ease);
}
.rel-card:hover{transform:translateY(-2px);border-color:var(--line-hover);background:rgba(61,217,198,.07)}
.rel-top{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.rel-ico{
  width:34px;height:34px;border-radius:10px;display:inline-flex;align-items:center;justify-content:center;
  background:rgba(25,194,176,.14);color:var(--brand-400);
}
.rel-title{font-size:17px;font-weight:600;color:var(--txt-1)}
.rel-text{font-size:14px;color:var(--txt-2);line-height:1.85;margin-bottom:14px}
@media (max-width:768px){.rel-grid{grid-template-columns:1fr}}

/* ---------- CTA ---------- */
.cta-panel{
  display:grid;grid-template-columns:1.4fr .6fr;gap:28px;align-items:center;
  padding:40px;border-radius:var(--r-panel);
  background:linear-gradient(120deg,rgba(25,194,176,.14),rgba(11,37,49,.6));
  border:1px solid var(--line-hover);
  box-shadow:var(--shadow-glow);
}
.cta-panel h2{padding-left:0}
.cta-panel h2::before{display:none}
.cta-text{font-size:14.8px;color:var(--txt-2);margin-top:14px;max-width:640px;line-height:1.9}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:24px}
.cta-side{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  aspect-ratio:16/10;position:relative;
}
.cta-side img{width:100%;height:100%;object-fit:cover}
.cta-side::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,15,22,.2),rgba(5,15,22,.7))}
@media (max-width:900px){.cta-panel{grid-template-columns:1fr;padding:28px}}

/* ---------- 表单 ---------- */
.field-label{display:block;font-size:13px;color:var(--txt-3);margin-bottom:8px}
.field-input{
  width:100%;height:48px;padding:0 16px;border-radius:12px;
  background:rgba(5,15,22,.7);border:1px solid rgba(255,255,255,.12);
  color:var(--txt-1);transition:border-color .25s var(--ease),box-shadow .25s var(--ease);
}
.field-input::placeholder{color:var(--txt-3)}
.field-input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(25,194,176,.18)}
.field-input.is-error{border-color:var(--err);box-shadow:0 0 0 3px rgba(248,113,113,.16)}
.field-hint{font-size:12px;color:var(--err);margin-top:8px}
.field-help{font-size:12px;color:var(--txt-3);margin-top:8px}
.subscribe-row{display:flex;gap:12px;margin-top:20px;max-width:520px}
@media (max-width:520px){.subscribe-row{flex-direction:column}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-800);border-top:1px solid var(--line)}
.footer-title{font-size:14px;color:var(--brand-400);font-weight:600;margin-bottom:16px;letter-spacing:.4px}
.footer-link{display:block;font-size:14px;color:var(--txt-2);line-height:2.1;transition:color .25s var(--ease),transform .25s var(--ease)}
.footer-link:hover{color:var(--txt-1);transform:translateX(2px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;
  padding:18px 0 26px;border-top:1px solid var(--line);
  font-size:13px;color:var(--txt-3);
}
.footer-bottom a{color:var(--txt-2)}
.footer-bottom a:hover{color:var(--brand-400)}

/* ---------- 回到顶部 ---------- */
.to-top{
  position:fixed;right:20px;bottom:24px;z-index:70;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line-hover);
  background:linear-gradient(150deg,rgba(25,194,176,.9),rgba(14,158,146,.9));
  color:var(--txt-invert);display:inline-flex;align-items:center;justify-content:center;
  cursor:pointer;box-shadow:var(--shadow-glow);
  opacity:0;visibility:hidden;transform:translateY(10px);
  transition:all .3s var(--ease);
}
.to-top.is-show{opacity:1;visibility:visible;transform:translateY(0)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .4s var(--ease),transform .4s var(--ease)}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero-side{position:static;width:100%;margin-top:16px}
  .stat-bar{grid-template-columns:1fr 1fr}
}
@media (max-width:520px){
  .stat-bar{grid-template-columns:1fr}
  .hero{padding:32px 0 52px}
}