/* roulang page: index */
:root{
  --bg:#0B0F14;
  --bg-2:#11161F;
  --card:#151C26;
  --footer:#070A0E;
  --line:rgba(255,255,255,0.08);
  --text:#F4F7FB;
  --text-2:#A8B2C1;
  --text-3:#6F7A8A;
  --cyan:#2DE2E6;
  --magenta:#FF4F9A;
  --lime:#D7FF3F;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 16px 40px rgba(0,0,0,.35);
  --glow:0 0 0 1px rgba(45,226,230,.10);
  --pad-x:20px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0;letter-spacing:.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

.container{
  width:100%;
  max-width:1240px;
  margin:0 auto;
  padding-left:var(--pad-x);
  padding-right:var(--pad-x);
}
@media(min-width:768px){:root{--pad-x:32px}}
@media(min-width:1024px){:root{--pad-x:48px}}

.section{padding:64px 0}
@media(min-width:768px){.section{padding:88px 0}}
@media(min-width:1024px){.section{padding:112px 0}}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,15,20,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  height:74px;display:flex;align-items:center;justify-content:space-between;gap:24px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:.02em;white-space:nowrap}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--cyan),#128b8f 60%,#0c3f42);
  box-shadow:0 0 0 1px rgba(45,226,230,.35),0 0 18px rgba(45,226,230,.28);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:9px 8px;border-radius:2px;
  background:rgba(7,10,14,.75);
}
.brand span{color:var(--text)}
.brand em{font-style:normal;color:var(--cyan)}
.nav-links{display:none;align-items:center;gap:4px}
@media(min-width:1024px){.nav-links{display:flex}}
.nav-link{
  position:relative;padding:9px 14px;border-radius:999px;
  font-size:14.5px;letter-spacing:.02em;color:var(--text-2);
  transition:color .2s ease,background .2s ease;
}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.045)}
.nav-link.active{color:var(--text);background:rgba(45,226,230,.10)}
.nav-link.active::after{
  content:"";position:absolute;left:50%;bottom:2px;transform:translateX(-50%);
  width:16px;height:2px;border-radius:2px;background:var(--cyan);
}
.nav-cta{display:none}
@media(min-width:1024px){.nav-cta{display:inline-flex}}
.nav-toggle{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;border-radius:12px;
  border:1px solid var(--line);background:rgba(255,255,255,.03);cursor:pointer;
}
@media(min-width:1024px){.nav-toggle{display:none}}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.drawer{
  display:none;border-top:1px solid var(--line);
  background:rgba(9,12,17,.98);
}
.drawer.open{display:block}
.drawer-inner{padding:14px 0 22px;display:grid;gap:6px}
.drawer .nav-link{display:block;padding:12px 14px;border-radius:12px}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.02em;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-primary{background:var(--cyan);color:#04191b;box-shadow:0 10px 28px rgba(45,226,230,.22)}
.btn-primary:hover{transform:translateY(-2px);background:#4ceaeD;box-shadow:0 14px 34px rgba(45,226,230,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text)}
.btn-ghost:hover{transform:translateY(-2px);border-color:rgba(45,226,230,.55);background:rgba(45,226,230,.07)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;color:var(--cyan);
  font-weight:600;font-size:15px;border:0;background:none;cursor:pointer;padding:6px 0;
}
.btn-text i{font-style:normal;transition:transform .2s ease}
.btn-text:hover i{transform:translateX(4px)}
.btn-sm{padding:9px 18px;font-size:14px}

/* 标签 */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:999px;font-size:12.5px;letter-spacing:.04em;
  border:1px solid rgba(45,226,230,.28);color:var(--cyan);background:rgba(45,226,230,.07);
}
.tag-magenta{border-color:rgba(255,79,154,.3);color:var(--magenta);background:rgba(255,79,154,.08)}
.tag-lime{border-color:rgba(215,255,63,.28);color:var(--lime);background:rgba(215,255,63,.07)}
.tag-mute{border-color:var(--line);color:var(--text-2);background:rgba(255,255,255,.04)}

/* Hero */
.hero{
  position:relative;
  padding:56px 0 64px;
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(720px 380px at 8% 0%,rgba(45,226,230,.14),transparent 62%),
    radial-gradient(560px 340px at 92% 12%,rgba(255,79,154,.11),transparent 66%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.032) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.032) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 78%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.85),transparent 78%);
}
.hero-inner{position:relative;z-index:2;display:grid;gap:44px}
@media(min-width:1024px){
  .hero{padding:76px 0 92px}
  .hero-inner{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:64px;align-items:center}
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;color:var(--text-2);text-transform:uppercase;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--cyan)}
h1.hero-title{
  margin-top:20px;
  font-size:clamp(2rem,5vw,4rem);
  font-weight:800;line-height:1.1;letter-spacing:-.01em;
}
h1.hero-title mark{
  background:none;color:var(--cyan);
  position:relative;
}
.hero-sub{margin-top:22px;font-size:17px;color:var(--text-2);max-width:34ch}
.hero-actions{margin-top:34px;display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{
  margin-top:44px;display:grid;grid-template-columns:repeat(2,1fr);gap:18px;
  padding-top:26px;border-top:1px solid var(--line);
}
@media(min-width:768px){.hero-stats{grid-template-columns:repeat(4,1fr)}}
.stat-num{font-size:22px;font-weight:800;color:var(--text);font-variant-numeric:tabular-nums}
.stat-label{font-size:13px;color:var(--text-3);margin-top:2px}
.hero-visual{position:relative}
.hero-shot{
  border-radius:var(--r-card);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow),var(--glow);background:var(--card);
}
.hero-shot img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/11}
.hero-float{
  position:absolute;left:-6px;bottom:-18px;
  background:rgba(9,12,17,.94);border:1px solid rgba(45,226,230,.24);
  border-radius:16px;padding:14px 18px;box-shadow:var(--shadow);
  display:flex;align-items:center;gap:12px;max-width:min(320px,86vw);
}
@media(min-width:768px){.hero-float{left:-22px}}
.hero-float strong{display:block;font-size:14px}
.hero-float small{color:var(--text-3);font-size:12px}
.pulse-dot{width:9px;height:9px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 4px rgba(215,255,63,.14);flex:0 0 auto}

/* 板块标题 */
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:38px}
.section-kicker{font-size:13px;letter-spacing:.14em;color:var(--cyan);text-transform:uppercase}
h2.section-title{margin-top:12px;font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;line-height:1.25}
.section-desc{margin-top:12px;color:var(--text-2);max-width:60ch;font-size:15.5px}

/* 卡片 */
.card{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(45,226,230,.35);box-shadow:var(--shadow),var(--glow)}
.card-media{position:relative;overflow:hidden;background:#0d131b}
.card-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .45s ease}
.card:hover .card-media img{transform:scale(1.03)}
.card-body{padding:20px 22px 24px}
.card-body h3{font-size:1.25rem;font-weight:600;line-height:1.4}
.card-body p{margin-top:10px;color:var(--text-2);font-size:14.5px;line-height:1.8}
.card-meta{margin-top:16px;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3)}
.grid-cards{display:grid;gap:22px;grid-template-columns:1fr}
@media(min-width:768px){.grid-cards{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.grid-cards{grid-template-columns:repeat(3,1fr)}}
.card-wide{grid-column:span 1}
@media(min-width:1024px){
  .card-wide{grid-column:span 2;display:grid;grid-template-columns:1.05fr .95fr;align-items:stretch}
  .card-wide .card-media{height:100%}
  .card-wide .card-media img{aspect-ratio:auto;height:100%;min-height:280px}
  .card-wide .card-body{display:flex;flex-direction:column;justify-content:center;padding:32px 34px}
  .card-wide .card-body h3{font-size:1.6rem}
}
.card-media .badge-float{position:absolute;top:14px;left:14px}

/* 评价轮播 */
.review-track{
  display:flex;gap:20px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:14px;scrollbar-width:none;
}
.review-track::-webkit-scrollbar{display:none}
.review-card{
  flex:0 0 auto;width:min(360px,86vw);scroll-snap-align:start;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;display:flex;flex-direction:column;gap:14px;
}
.review-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:44px;height:44px;border-radius:50%;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px;color:#04191b;
  background:linear-gradient(135deg,var(--cyan),#0f7d80);
}
.review-name{font-weight:600;font-size:15px}
.review-time{font-size:12.5px;color:var(--text-3)}
.stars{color:var(--lime);letter-spacing:2px;font-size:14px}
.review-text{color:var(--text-2);font-size:14.5px}
.dots{display:flex;gap:8px;margin-top:22px}
.dot{
  width:9px;height:9px;border-radius:50%;border:1px solid rgba(255,255,255,.28);
  background:transparent;cursor:pointer;padding:0;transition:all .2s ease;
}
.dot.active{background:var(--cyan);border-color:var(--cyan);width:24px;border-radius:999px}

/* 保障条 */
.assure{
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:var(--bg-2);
}
.assure-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line)}
@media(min-width:1024px){.assure-grid{grid-template-columns:repeat(4,1fr)}}
.assure-item{background:var(--bg-2);padding:26px 22px;display:flex;gap:14px;align-items:flex-start}
.assure-icon{
  width:38px;height:38px;border-radius:11px;flex:0 0 auto;
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(45,226,230,.26);background:rgba(45,226,230,.07);color:var(--cyan);
}
.assure-item h3{font-size:15.5px;font-weight:600}
.assure-item p{margin-top:6px;font-size:13.5px;color:var(--text-3);line-height:1.7}

/* CTA 通栏 */
.cta-band{
  background:
    radial-gradient(620px 320px at 12% 0%,rgba(45,226,230,.16),transparent 64%),
    linear-gradient(180deg,#101823,#0C121A);
  border-top:1px solid rgba(45,226,230,.18);
  border-bottom:1px solid rgba(45,226,230,.18);
}
.cta-inner{
  padding:56px 0;display:flex;flex-wrap:wrap;gap:26px;align-items:center;justify-content:space-between;
}
@media(min-width:768px){.cta-inner{padding:64px 0}}
.cta-inner h2{font-size:clamp(1.4rem,3vw,2rem);font-weight:700;line-height:1.3;max-width:22ch}
.cta-inner p{margin-top:12px;color:var(--text-2);font-size:15px;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}

/* 列表（CMS） */
.post-list{display:grid;gap:20px;grid-template-columns:1fr}
@media(min-width:768px){.post-list{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.post-list{grid-template-columns:repeat(3,1fr)}}
.post-card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;display:flex;flex-direction:column;gap:12px;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.post-card:hover{transform:translateY(-4px);border-color:rgba(45,226,230,.35);box-shadow:var(--shadow),var(--glow)}
.post-card h3{font-size:1.12rem;font-weight:600;line-height:1.45}
.post-card p{color:var(--text-2);font-size:14.5px}
.post-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12.5px;color:var(--text-3);border-top:1px solid var(--line);padding-top:14px}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);background:rgba(255,255,255,.02);
  padding:48px 24px;text-align:center;color:var(--text-2);
}
.empty-state strong{display:block;font-size:17px;color:var(--text);margin-bottom:8px}
.empty-state a{color:var(--cyan)}

/* FAQ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;background:none;border:0;cursor:pointer;text-align:left;
  padding:22px 44px 22px 0;position:relative;
  font-size:17px;font-weight:600;color:var(--text);
}
.faq-q::after{
  content:"";position:absolute;right:8px;top:30px;width:9px;height:9px;
  border-right:2px solid var(--cyan);border-bottom:2px solid var(--cyan);
  transform:rotate(45deg);transition:transform .25s ease;
}
.faq-item.open .faq-q::after{transform:rotate(-135deg);top:34px}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 0 22px;color:var(--text-2);font-size:15.5px;max-width:78ch}
.faq-item.open .faq-a{max-height:420px}

/* 页脚 */
.site-footer{background:var(--footer);border-top:1px solid var(--line);margin-top:0}
.footer-grid{padding:64px 0 40px;display:grid;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
@media(min-width:1024px){.footer-grid{padding:76px 0 48px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:17px}
.footer-about{margin-top:16px;color:var(--text-3);font-size:14px;line-height:1.85;max-width:42ch}
.footer-col h4{font-size:14px;letter-spacing:.1em;color:var(--text-3);text-transform:uppercase;margin-bottom:16px}
.footer-col a{display:block;padding:6px 0;color:var(--text-2);font-size:14.5px;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-bottom{
  border-top:1px solid var(--line);padding:22px 0 34px;
  display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;
  color:var(--text-3);font-size:13px;
}
.footer-note{color:var(--text-3);font-size:13px}
@media(max-width:767px){
  .hero-float{position:static;margin-top:16px;max-width:none}
  .cta-inner{padding:48px 0}
}
@media(max-width:520px){
  body{font-size:16px}
  .card-body{padding:18px 18px 20px}
  .post-card{padding:20px}
  .hero-actions .btn{width:100%}
}

/* roulang page: article */
:root{
  --bg:#0B0F14;
  --bg-2:#11161F;
  --card:#151C26;
  --footer:#070A0E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text:#F4F7FB;
  --text-2:#A8B2C1;
  --text-3:#6F7A8A;
  --cyan:#2DE2E6;
  --pink:#FF4F9A;
  --lime:#D7FF3F;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:10px;
  --shadow:0 16px 40px rgba(0,0,0,.35);
  --container:1240px;
  --font:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--text);font-family:var(--font);
  font-size:16.5px;line-height:1.85;-webkit-font-smoothing:antialiased;
  background-image:radial-gradient(900px 480px at 12% -8%,rgba(45,226,230,.09),transparent 60%),
                   radial-gradient(760px 420px at 92% 4%,rgba(255,79,154,.07),transparent 62%);
  background-repeat:no-repeat;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 32px}}
@media (min-width:1024px){.container{padding:0 48px}}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(11,15,20,.88);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:18px;min-height:76px}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.01em;white-space:nowrap}
.brand-mark{width:10px;height:10px;border-radius:3px;background:var(--cyan);box-shadow:0 0 14px rgba(45,226,230,.75);flex:0 0 auto}
.brand em{color:var(--cyan);font-style:normal}
.nav-links{display:none;margin-left:auto;align-items:center;gap:4px}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-link{position:relative;display:inline-block;padding:9px 14px;font-size:14.5px;letter-spacing:.02em;color:var(--text-2);border-radius:999px;transition:color .22s ease,background .22s ease}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
.nav-link.active{color:var(--text);background:rgba(45,226,230,.08)}
.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:3px;height:2px;border-radius:2px;background:var(--cyan);box-shadow:0 0 10px rgba(45,226,230,.7)}
.nav-toggle{margin-left:auto;width:44px;height:40px;display:inline-flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;background:transparent;border:1px solid var(--line-strong);border-radius:var(--r-sm);cursor:pointer;transition:border-color .22s ease,background .22s ease}
.nav-toggle:hover{border-color:rgba(45,226,230,.5);background:rgba(45,226,230,.06)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s ease,opacity .25s ease}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media (min-width:1024px){.nav-toggle{display:none}}
.mobile-drawer{display:none;border-top:1px solid var(--line);background:rgba(7,10,14,.98);padding:12px 0 20px}
.mobile-drawer.open{display:block}
.mobile-drawer a{display:block;padding:13px 20px;font-size:15px;color:var(--text-2);border-bottom:1px solid rgba(255,255,255,.05)}
.mobile-drawer a:hover,.mobile-drawer a.active{color:var(--cyan)}
@media (min-width:1024px){.mobile-drawer{display:none!important}}

/* ---------- article hero ---------- */
.article-hero{position:relative;border-bottom:1px solid var(--line);background-image:linear-gradient(90deg,rgba(11,15,20,.94) 0%,rgba(11,15,20,.72) 55%,rgba(11,15,20,.94) 100%),url("/assets/images/backpic/back-1.png");background-size:cover;background-position:center}
.article-hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:56px 56px;opacity:.5;pointer-events:none}
.article-hero-inner{position:relative;z-index:1;padding:26px 0 40px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;line-height:1.6;color:var(--text-3)}
.breadcrumb a{color:var(--text-2);transition:color .2s ease}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{opacity:.5}
.breadcrumb .crumb-current{color:var(--text-3);max-width:52ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;font-size:12.5px;letter-spacing:.03em;border-radius:999px;border:1px solid var(--line-strong);color:var(--text-2);background:rgba(255,255,255,.03)}
.tag-cyan{color:var(--cyan);border-color:rgba(45,226,230,.4);background:rgba(45,226,230,.08)}
.tag-lime{color:var(--lime);border-color:rgba(215,255,63,.32);background:rgba(215,255,63,.07)}
.article-title{margin-top:16px;font-size:clamp(1.7rem,3.6vw,2.7rem);font-weight:800;line-height:1.24;letter-spacing:.005em;max-width:26ch}
@media (max-width:768px){.article-title{max-width:none}}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 22px;margin-top:20px;font-size:13.5px;color:var(--text-3)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--text-3);opacity:.6}
.article-meta strong{color:var(--text-2);font-weight:500}

/* ---------- layout ---------- */
.article-main{padding:52px 0 72px}
@media (min-width:1024px){.article-main{padding:68px 0 96px}}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:40px}
@media (min-width:1024px){.article-layout{grid-template-columns:minmax(0,1fr) 288px;gap:56px}}
.article-wrap{min-width:0;max-width:840px}

/* ---------- content ---------- */
.article-content{font-size:17px;line-height:1.9;color:#DCE3ED}
.article-content>*+*{margin-top:1.25em}
.article-content h2{margin-top:2.2em;font-size:clamp(1.35rem,2.4vw,1.7rem);font-weight:700;line-height:1.35;color:var(--text);padding-left:16px;border-left:3px solid var(--cyan)}
.article-content h3{margin-top:1.9em;font-size:1.2rem;font-weight:600;line-height:1.45;color:var(--text)}
.article-content h4{margin-top:1.6em;font-size:1.05rem;font-weight:600;color:var(--text)}
.article-content p{margin-top:1.25em}
.article-content a{color:var(--cyan);border-bottom:1px solid rgba(45,226,230,.35);transition:border-color .2s ease,color .2s ease}
.article-content a:hover{color:#7ff2f4;border-color:var(--cyan)}
.article-content strong{color:var(--text);font-weight:600}
.article-content ul,.article-content ol{margin-top:1.25em;padding-left:2px}
.article-content li{position:relative;padding-left:24px;margin-top:.7em}
.article-content ul li::before{content:"";position:absolute;left:4px;top:.78em;width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px rgba(45,226,230,.6)}
.article-content ol{counter-reset:olc}
.article-content ol li{counter-increment:olc}
.article-content ol li::before{content:counter(olc);position:absolute;left:0;top:.32em;width:18px;height:18px;line-height:18px;text-align:center;font-size:11.5px;font-weight:700;color:#08201f;background:var(--cyan);border-radius:6px}
.article-content blockquote{margin-top:1.6em;padding:20px 24px;border-left:3px solid var(--pink);background:linear-gradient(90deg,rgba(255,79,154,.09),rgba(255,79,154,0));border-radius:0 var(--r-md) var(--r-md) 0;color:var(--text-2);font-size:16px}
.article-content img{border-radius:var(--r-md);margin-top:1.6em;box-shadow:var(--shadow)}
.article-content figure{margin-top:1.6em}
.article-content figcaption{margin-top:10px;font-size:13px;color:var(--text-3);text-align:center}
.article-content table{width:100%;margin-top:1.6em;border-collapse:collapse;font-size:15px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}
.article-content thead th{background:rgba(45,226,230,.08);color:var(--text);font-weight:600;text-align:left}
.article-content th,.article-content td{padding:12px 16px;border-bottom:1px solid var(--line)}
.article-content tbody tr:last-child td{border-bottom:none}
.article-content tbody tr:hover{background:rgba(255,255,255,.03)}
.article-content code{padding:2px 7px;font-size:14px;font-family:ui-monospace,SFMono-Regular,Consolas,monospace;color:var(--lime);background:rgba(215,255,63,.08);border:1px solid rgba(215,255,63,.18);border-radius:6px}
.article-content pre{margin-top:1.6em;padding:18px 20px;overflow-x:auto;background:#0A0E13;border:1px solid var(--line);border-radius:var(--r-md);font-size:14px;line-height:1.75}
.article-content pre code{padding:0;background:none;border:none;color:#CBD6E4}
.article-content hr{margin:2.4em 0;border:none;border-top:1px solid var(--line)}

/* ---------- empty state ---------- */
.empty-state{margin-top:8px;padding:52px 28px;text-align:center;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow)}
.empty-state .icon{width:56px;height:56px;margin:0 auto 18px;border-radius:16px;border:1px solid rgba(45,226,230,.35);display:flex;align-items:center;justify-content:center;color:var(--cyan);font-size:22px;background:rgba(45,226,230,.07)}
.empty-state h2{font-size:1.2rem;font-weight:700;color:var(--text)}
.empty-state p{margin-top:12px;color:var(--text-2);font-size:15px}
.empty-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:center}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-size:15px;font-weight:600;letter-spacing:.01em;border-radius:var(--r-sm);border:1px solid transparent;cursor:pointer;transition:transform .2s ease,background .22s ease,border-color .22s ease,box-shadow .22s ease,color .22s ease}
.btn-primary{background:var(--cyan);color:#04211f;box-shadow:0 10px 26px rgba(45,226,230,.22)}
.btn-primary:hover{background:#5eedf0;transform:translateY(-2px);box-shadow:0 14px 30px rgba(45,226,230,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn-ghost:hover{border-color:rgba(45,226,230,.55);color:var(--cyan);transform:translateY(-2px);background:rgba(45,226,230,.05)}
.btn-link{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:14.5px;font-weight:600}
.btn-link .arrow{transition:transform .22s ease}
.btn-link:hover .arrow{transform:translateX(4px)}

/* ---------- sidebar ---------- */
.article-side{min-width:0}
.side-sticky{position:sticky;top:100px;display:flex;flex-direction:column;gap:20px}
.side-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px 20px 22px;box-shadow:var(--shadow)}
.side-card h3{font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--text-2);display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px rgba(45,226,230,.7)}
.toc-list{margin-top:14px;display:flex;flex-direction:column;gap:2px;max-height:340px;overflow:auto}
.toc-list a{display:block;padding:7px 10px;font-size:14px;line-height:1.6;color:var(--text-2);border-radius:var(--r-sm);border-left:2px solid transparent;transition:color .2s ease,background .2s ease,border-color .2s ease}
.toc-list a:hover{color:var(--text);background:rgba(255,255,255,.04)}
.toc-list a.is-current{color:var(--cyan);background:rgba(45,226,230,.08);border-left-color:var(--cyan)}
.toc-list a.depth-3{padding-left:22px;font-size:13.5px;color:var(--text-3)}
.side-links{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 14px;font-size:14px;color:var(--text-2);background:rgba(255,255,255,.03);border:1px solid var(--line);border-radius:var(--r-sm);transition:border-color .2s ease,color .2s ease,transform .2s ease}
.side-links a:hover{color:var(--cyan);border-color:rgba(45,226,230,.4);transform:translateX(3px)}
.side-links a span.arw{color:var(--text-3)}

/* ---------- article footer nav ---------- */
.article-foot{margin-top:48px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;padding:22px 24px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg)}
.article-foot p{font-size:14px;color:var(--text-3)}

/* ---------- related ---------- */
.related{margin-top:72px;padding-top:48px;border-top:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:28px}
.section-head h2{font-size:clamp(1.4rem,2.6vw,1.9rem);font-weight:700}
.section-head p{margin-top:8px;font-size:14.5px;color:var(--text-3);max-width:60ch}
.related-grid{display:grid;grid-template-columns:1fr;gap:22px}
@media (min-width:640px){.related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.related-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
.rcard{display:flex;flex-direction:column;overflow:hidden;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease}
.rcard:hover{transform:translateY(-4px);border-color:rgba(45,226,230,.4);box-shadow:0 18px 40px rgba(0,0,0,.42),0 0 0 1px rgba(45,226,230,.12)}
.rcard-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:#0A0E13}
.rcard-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.rcard:hover .rcard-media img{transform:scale(1.04)}
.rcard-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,15,20,0) 40%,rgba(11,15,20,.72) 100%)}
.rcard-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.rcard-body h3{font-size:1.06rem;font-weight:600;line-height:1.5}
.rcard-body p{font-size:14.5px;color:var(--text-2);line-height:1.75}
.rcard-body .btn-link{margin-top:auto;padding-top:6px}

/* ---------- fab ---------- */
.top-fab{position:fixed;right:22px;bottom:26px;z-index:70;width:46px;height:46px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:rgba(21,28,38,.92);border:1px solid var(--line-strong);color:var(--text-2);cursor:pointer;opacity:0;visibility:hidden;transition:opacity .25s ease,transform .25s ease,border-color .25s ease,color .25s ease}
.top-fab.show{opacity:1;visibility:visible}
.top-fab:hover{color:var(--cyan);border-color:rgba(45,226,230,.5);transform:translateY(-3px)}

/* ---------- footer ---------- */
.site-footer{background:var(--footer);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1fr;gap:36px}
@media (min-width:768px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px}}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16.5px;font-weight:700}
.footer-about{margin-top:14px;font-size:14px;line-height:1.85;color:var(--text-3);max-width:44ch}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.05em;color:var(--text-2);margin-bottom:14px}
.footer-col a{display:block;padding:6px 0;font-size:14px;color:var(--text-3);transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-bottom{margin-top:44px;padding-top:20px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;font-size:13px;color:var(--text-3)}
.footer-note{color:#59616f}

/* roulang page: category1 */
:root{
  --obsidian:#0B0F14;
  --bg-2:#11161F;
  --card:#151C26;
  --footer-bg:#070A0E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text:#F4F7FB;
  --muted:#A8B2C1;
  --weak:#6F7A8A;
  --cyan:#2DE2E6;
  --magenta:#FF4F9A;
  --lime:#D7FF3F;
  --r-card:18px;
  --r-btn:12px;
  --r-img:14px;
  --shadow:0 16px 40px rgba(0,0,0,.35);
  --container:1240px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--obsidian);
  color:var(--text);
  font-family:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
ul{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding-left:48px;padding-right:48px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,15,20,.9);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:28px;min-height:76px}
.brand{display:flex;align-items:center;gap:10px;font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.brand-text em{font-style:normal;color:var(--cyan)}
.brand-mark{
  width:11px;height:11px;border-radius:3px;flex:none;
  background:linear-gradient(135deg,var(--cyan),var(--magenta));
  box-shadow:0 0 14px rgba(45,226,230,.55);
}
.nav-links{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav-link{
  position:relative;color:var(--muted);font-size:15px;letter-spacing:.02em;
  padding:6px 0;transition:color .2s ease;
}
.nav-link:hover{color:var(--text)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{
  content:"";position:absolute;left:0;right:0;bottom:-6px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--cyan),var(--magenta));
}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:40px;height:40px;border-radius:10px;
  border:1px solid var(--line-strong);background:transparent;color:var(--text);
  cursor:pointer;transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:rgba(45,226,230,.5);color:var(--cyan)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-size:15px;font-weight:600;letter-spacing:.02em;
  padding:12px 22px;border-radius:var(--r-btn);
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s ease,background .18s ease,border-color .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn-primary{
  background:var(--cyan);color:#06121A;
  box-shadow:0 0 0 1px rgba(45,226,230,.3),0 10px 26px rgba(45,226,230,.16);
}
.btn-primary:hover{background:#4DEEF1;transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;color:var(--text);border-color:var(--line-strong)}
.btn-outline:hover{border-color:rgba(45,226,230,.55);color:var(--cyan);transform:translateY(-2px)}
.btn-outline:active{transform:translateY(0)}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}
.arrow-link{
  display:inline-flex;align-items:center;gap:7px;
  color:var(--cyan);font-size:14px;font-weight:600;
}
.arrow-link .arrow{transition:transform .2s ease}
.arrow-link:hover .arrow{transform:translateX(4px)}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#0B0F14 0%,#11161F 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(680px 320px at 12% -12%,rgba(45,226,230,.16),transparent 66%),
    radial-gradient(520px 300px at 90% 6%,rgba(255,79,154,.12),transparent 72%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.6;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(circle at 50% 18%,#000,transparent 76%);
  mask-image:radial-gradient(circle at 50% 18%,#000,transparent 76%);
}
.hero-inner{position:relative;z-index:1}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--weak);padding-top:26px}
.crumb a{color:var(--weak);transition:color .2s ease}
.crumb a:hover{color:var(--cyan)}
.crumb .sep{color:rgba(255,255,255,.22)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding:44px 0 58px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.12em;color:var(--cyan);
  padding:5px 14px;border-radius:999px;
  border:1px solid rgba(45,226,230,.32);background:rgba(45,226,230,.07);
}
.hero h1{
  margin-top:20px;
  font-size:clamp(1.95rem,3.9vw,3.1rem);
  font-weight:800;line-height:1.15;letter-spacing:.01em;
}
.hero h1 .hl{color:var(--cyan)}
.hero-sub{margin-top:18px;font-size:17px;color:var(--muted);max-width:30em}
.hero-actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.hero-note{margin-top:20px;font-size:13px;color:var(--weak)}
.hero-visual{position:relative}
.hero-visual img{
  width:100%;border-radius:var(--r-img);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
  aspect-ratio:16/11;object-fit:cover;
}
.hero-chip{
  position:absolute;right:-6px;bottom:-22px;
  background:rgba(21,28,38,.94);
  border:1px solid var(--line-strong);
  border-radius:14px;padding:14px 18px;
  box-shadow:var(--shadow);
  backdrop-filter:blur(8px);
  max-width:250px;
}
.hero-chip .chip-title{font-size:13px;font-weight:700;display:flex;align-items:center;gap:8px}
.hero-chip .dot{width:7px;height:7px;border-radius:50%;background:var(--lime);box-shadow:0 0 10px rgba(215,255,63,.7);flex:none}
.hero-chip .chip-text{margin-top:6px;font-size:12.5px;line-height:1.6;color:var(--muted)}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
  border-top:1px solid var(--line);padding:24px 0 34px;
}
.stat-item{display:flex;flex-direction:column;gap:4px}
.stat-label{font-size:12px;letter-spacing:.1em;color:var(--weak)}
.stat-value{font-size:15px;font-weight:600;color:var(--text)}

/* ---------- sections ---------- */
.section{padding:96px 0}
.section-tight{padding:72px 0}
.section-head{max-width:720px}
.section-head h2{
  font-size:clamp(1.5rem,3vw,2.25rem);
  font-weight:700;line-height:1.25;
}
.section-head p{margin-top:14px;color:var(--muted);font-size:15.5px}
.section-head .rule{
  width:56px;height:3px;border-radius:3px;margin-bottom:18px;
  background:linear-gradient(90deg,var(--cyan),var(--magenta));
}

/* ---------- entry cards ---------- */
.entry-grid{
  display:grid;grid-template-columns:repeat(2,1fr);
  gap:28px;margin-top:52px;padding-bottom:44px;
}
.entry-card{
  display:flex;flex-direction:column;
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  overflow:hidden;
  transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.entry-card:nth-child(even){margin-top:48px}
.entry-card:hover{
  transform:translateY(-4px);
  border-color:rgba(45,226,230,.42);
  box-shadow:0 22px 46px rgba(0,0,0,.48);
}
.entry-thumb{position:relative;aspect-ratio:16/10;overflow:hidden;background:#0E1319}
.entry-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.entry-card:hover .entry-thumb img{transform:scale(1.03)}
.entry-thumb::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(11,15,20,0) 45%,rgba(11,15,20,.72) 100%);
}
.entry-body{padding:24px 26px 28px;display:flex;flex-direction:column;gap:12px;flex:1}
.tag{
  display:inline-block;align-self:flex-start;
  font-size:12px;letter-spacing:.06em;padding:4px 12px;border-radius:999px;
  color:var(--cyan);background:rgba(45,226,230,.08);
  border:1px solid rgba(45,226,230,.32);
}
.tag-pink{color:var(--magenta);background:rgba(255,79,154,.08);border-color:rgba(255,79,154,.32)}
.tag-lime{color:var(--lime);background:rgba(215,255,63,.07);border-color:rgba(215,255,63,.3)}
.entry-body h3{font-size:1.25rem;font-weight:600;line-height:1.45}
.entry-body p{font-size:14.5px;color:var(--muted);line-height:1.8}
.entry-body .arrow-link{margin-top:auto;padding-top:6px}

/* ---------- guard bar ---------- */
.guard-bar{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(17,22,31,.6)}
.guard-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;padding:32px 0}
.guard-item{display:flex;gap:14px;align-items:flex-start}
.guard-icon{
  width:36px;height:36px;flex:none;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(45,226,230,.28);
  background:rgba(45,226,230,.07);
  color:var(--cyan);font-size:15px;font-weight:700;
}
.guard-item h4{font-size:14.5px;font-weight:600}
.guard-item p{margin-top:4px;font-size:13px;color:var(--weak);line-height:1.7}

/* ---------- faq ---------- */
.faq-list{margin-top:36px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--text);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--cyan)}
.faq-item summary .faq-mark{
  position:relative;width:16px;height:16px;flex:none;
}
.faq-item summary .faq-mark::before,
.faq-item summary .faq-mark::after{
  content:"";position:absolute;background:var(--cyan);border-radius:2px;
  transition:transform .25s ease,opacity .25s ease;
}
.faq-item summary .faq-mark::before{top:7px;left:0;width:16px;height:2px}
.faq-item summary .faq-mark::after{left:7px;top:0;width:2px;height:16px}
.faq-item[open] summary .faq-mark::after{transform:scaleY(0);opacity:0}
.faq-item[open] summary{color:var(--cyan)}
.faq-answer{padding:0 4px 26px;color:var(--muted);font-size:15.5px;line-height:1.9;max-width:860px}

/* ---------- cta ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border:1px solid var(--line);border-radius:22px;
  background:linear-gradient(120deg,#0D131A 0%,#151D28 100%);
  padding:48px 52px;
  display:flex;align-items:center;justify-content:space-between;gap:36px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(420px 220px at 88% 0%,rgba(45,226,230,.16),transparent 70%);
}
.cta-copy{position:relative;z-index:1;max-width:620px}
.cta-copy h2{font-size:clamp(1.35rem,2.4vw,1.9rem);font-weight:700;line-height:1.3}
.cta-copy p{margin-top:12px;color:var(--muted);font-size:15px}
.cta-actions{position:relative;z-index:1;display:flex;flex-wrap:wrap;gap:14px;align-items:center;flex:none}

/* ---------- footer ---------- */
.site-footer{background:var(--footer-bg);border-top:1px solid var(--line);padding:64px 0 28px;margin-top:96px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:700;letter-spacing:.02em}
.footer-about{margin-top:16px;font-size:14px;color:var(--weak);line-height:1.85;max-width:34em}
.footer-col h4{font-size:14px;font-weight:600;color:var(--text);letter-spacing:.04em;margin-bottom:16px}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:5px 0;transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:var(--cyan);transform:translateX(3px)}
.footer-bottom{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;gap:12px 28px;justify-content:space-between;
  font-size:13px;color:var(--weak);
}
.footer-note{color:rgba(111,122,138,.85)}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .container{padding-left:32px;padding-right:32px}
  .hero-grid{grid-template-columns:1fr;gap:40px;padding:36px 0 46px}
  .hero-visual{order:2}
  .hero-chip{position:static;margin-top:16px;max-width:none}
  .entry-card:nth-child(even){margin-top:0}
  .entry-grid{padding-bottom:0}
  .guard-grid{grid-template-columns:repeat(2,1fr);gap:22px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .cta-band{flex-direction:column;align-items:flex-start;padding:40px 34px}
  .section{padding:72px 0}

  .nav-links{
    position:absolute;top:100%;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:#0D1218;border-bottom:1px solid var(--line);
    padding:10px 32px 18px;display:none;
  }
  .nav-links.is-open{display:flex}
  .nav-link{width:100%;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.07)}
  .nav-link.active::after{display:none}
  .nav-link.active{color:var(--cyan)}
  .nav-toggle{display:inline-flex}
  .header-actions .btn{display:none}
}
@media (max-width:768px){
  .entry-grid{grid-template-columns:1fr;gap:22px}
  .hero-stats{grid-template-columns:1fr;gap:14px;padding:20px 0 28px}
  .guard-grid{grid-template-columns:1fr}
  .cta-actions{width:100%}
  .cta-actions .btn{flex:1 1 auto}
}
@media (max-width:640px){
  .container{padding-left:20px;padding-right:20px}
  body{font-size:15.5px}
  .brand{font-size:15.5px}
  .section{padding:56px 0}
  .section-tight{padding:48px 0}
  .site-footer{padding:48px 0 24px;margin-top:64px}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .faq-item summary{font-size:16px;padding:18px 0}
  .cta-band{padding:32px 22px;border-radius:18px}
}

/* roulang page: category2 */
:root{
  --ink:#0B0F14;
  --panel:#11161F;
  --card:#151C26;
  --deep:#070A0E;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --text:#F4F7FB;
  --muted:#A8B2C1;
  --dim:#6F7A8A;
  --cyan:#2DE2E6;
  --magenta:#FF4F9A;
  --lime:#D7FF3F;
  --r-lg:18px;
  --r-md:14px;
  --r-sm:10px;
  --shadow:0 16px 40px rgba(0,0,0,.35);
  --shadow-soft:0 0 0 1px rgba(45,226,230,.08);
  --gap:24px;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:'HarmonyOS Sans SC','Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;
  font-size:16.5px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-radius:var(--r-md)}
a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,opacity .2s ease}
button{font-family:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,textarea,select{font-family:inherit;font-size:15px;color:var(--text);background:var(--ink);border:1px solid var(--line);border-radius:var(--r-sm);padding:12px 14px;width:100%;outline:none;transition:border-color .2s ease,box-shadow .2s ease}
input:focus,textarea:focus,select:focus{border-color:var(--cyan);box-shadow:0 0 0 3px rgba(45,226,230,.16)}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
::selection{background:rgba(45,226,230,.28)}
:focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

.container{width:100%;max-width:1240px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}
@media(min-width:1024px){.container{padding:0 48px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(11,15,20,.86);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.site-header.is-scrolled{box-shadow:0 10px 30px rgba(0,0,0,.45)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:76px;gap:20px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:17px;letter-spacing:.02em}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex:none;
  background:linear-gradient(140deg,var(--cyan),rgba(45,226,230,.15) 55%,rgba(255,79,154,.55));
  box-shadow:0 0 0 1px rgba(45,226,230,.28),0 6px 18px rgba(45,226,230,.18);
  position:relative;
}
.brand-mark::after{content:"";position:absolute;inset:9px;border-radius:3px;background:var(--ink)}
.brand-text em{font-style:normal;color:var(--cyan)}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link{
  position:relative;
  padding:10px 12px;
  font-size:14.5px;
  letter-spacing:.02em;
  color:var(--muted);
  border-radius:999px;
  white-space:nowrap;
}
.nav-link:hover{color:var(--text)}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;border-radius:2px;
  background:var(--cyan);transform:scaleX(0);transform-origin:left;transition:transform .25s ease;
}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--text)}
.nav-link.active::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:10px}
.nav-toggle{
  display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:var(--r-sm);
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

@media(max-width:1023px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:2px;
    background:var(--panel);
    border-bottom:1px solid var(--line);
    padding:14px 20px 22px;
    display:none;
  }
  .nav-links.is-open{display:flex}
  .nav-link{padding:14px 4px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link::after{display:none}
  .nav-link.active{color:var(--cyan)}
}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:12px;
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  border:1px solid transparent;
}
.btn-primary{background:var(--cyan);color:#05202a;box-shadow:0 10px 26px rgba(45,226,230,.2)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(45,226,230,.28)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{border-color:var(--line-strong);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px;border-radius:10px}
.btn-text{display:inline-flex;align-items:center;gap:6px;color:var(--cyan);font-size:15px;font-weight:600}
.btn-text i{transition:transform .2s ease;font-style:normal}
.btn-text:hover i{transform:translateX(4px)}

/* ---------- chips ---------- */
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 14px;border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  font-size:13.5px;color:var(--muted);
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.chip:hover{border-color:var(--cyan);color:var(--cyan);background:rgba(45,226,230,.06)}
.tag{
  display:inline-flex;align-items:center;
  padding:5px 11px;border-radius:999px;
  font-size:12.5px;letter-spacing:.04em;
  background:rgba(45,226,230,.1);color:var(--cyan);
  border:1px solid rgba(45,226,230,.22);
}
.tag-pink{background:rgba(255,79,154,.12);color:var(--magenta);border-color:rgba(255,79,154,.26)}
.tag-lime{background:rgba(215,255,63,.1);color:var(--lime);border-color:rgba(215,255,63,.24)}

/* ---------- sections ---------- */
.section{padding:64px 0}
@media(min-width:1024px){.section{padding:100px 0}}
.section-head{max-width:760px;margin-bottom:36px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--cyan);margin-bottom:14px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--cyan);display:block}
h1{font-size:clamp(2rem,5vw,3.6rem);font-weight:800;line-height:1.12;letter-spacing:-.01em}
h2{font-size:clamp(1.5rem,3vw,2.25rem);font-weight:700;line-height:1.25}
h3{font-size:1.25rem;font-weight:600;line-height:1.4}
.lead{color:var(--muted);font-size:16.5px;line-height:1.85}
.small{font-size:13px;line-height:1.6;color:var(--dim)}

/* ---------- hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:
    radial-gradient(900px 420px at 12% -10%,rgba(45,226,230,.14),transparent 62%),
    radial-gradient(700px 380px at 96% 6%,rgba(255,79,154,.12),transparent 60%),
    var(--ink);
}
.page-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:64px 64px;opacity:.55;pointer-events:none;
}
.hero-grid{position:relative;display:grid;gap:40px;padding:64px 0 72px;align-items:center}
@media(min-width:1024px){.hero-grid{grid-template-columns:1.05fr .95fr;gap:56px;padding:92px 0 104px}}
.crumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--dim);margin-bottom:22px}
.crumb a:hover{color:var(--cyan)}
.crumb span{color:var(--line-strong)}
.hero-sub{color:var(--muted);font-size:17px;margin-top:20px;max-width:520px}
.hero-title em{font-style:normal;color:var(--cyan)}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-figure{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
.hero-figure img{width:100%;height:340px;object-fit:cover;border-radius:0;filter:saturate(1.05)}
@media(min-width:1024px){.hero-figure img{height:420px}}
.hero-figure::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,15,20,.12),rgba(11,15,20,.72))}
.hero-badge{
  position:absolute;left:20px;bottom:20px;z-index:2;
  display:flex;align-items:center;gap:10px;
  padding:12px 16px;border-radius:12px;
  background:rgba(7,10,14,.78);border:1px solid var(--line-strong);
  font-size:13.5px;color:var(--text);backdrop-filter:blur(8px);
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(45,226,230,.16);flex:none}

/* ---------- cards ---------- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
}
.card:hover{transform:translateY(-4px);border-color:rgba(45,226,230,.4);box-shadow:var(--shadow),var(--shadow-soft)}
.card p{color:var(--muted);margin-top:12px;font-size:15.5px}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  border:1px solid rgba(45,226,230,.24);color:var(--cyan);background:rgba(45,226,230,.07);
  font-weight:800;font-size:15px;margin-bottom:18px;
}
.media-card{position:relative;overflow:hidden;border-radius:var(--r-lg);border:1px solid var(--line);background:var(--card);padding:0}
.media-card img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform .5s ease}
.media-card:hover img{transform:scale(1.04)}
.media-body{padding:24px;position:relative;z-index:2}
.media-body p{color:var(--muted);font-size:15.5px;margin-top:10px}

/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;gap:32px;margin-top:12px}
@media(min-width:900px){.timeline{grid-template-columns:repeat(4,1fr);gap:26px}}
.timeline::before{content:"";position:absolute;left:26px;top:20px;bottom:20px;width:1px;background:linear-gradient(180deg,transparent,rgba(255,255,255,.14),transparent)}
@media(min-width:900px){
  .timeline::before{left:6%;right:6%;top:27px;bottom:auto;width:auto;height:1px;background:linear-gradient(90deg,transparent,rgba(255,255,255,.16),transparent)}
}
.tl-item{position:relative;padding-left:76px;min-height:56px}
@media(min-width:900px){.tl-item{padding-left:0;padding-top:76px}}
.tl-node{
  position:absolute;left:0;top:0;
  width:52px;height:52px;border-radius:50%;
  display:grid;place-items:center;
  background:var(--card);border:1px solid var(--line-strong);
  color:var(--cyan);font-weight:800;font-size:17px;
  box-shadow:0 0 0 6px rgba(11,15,20,1);
  z-index:2;
}
@media(min-width:900px){.tl-node{left:50%;transform:translateX(-50%)}}
.tl-item h3{margin-bottom:8px}
.tl-item p{color:var(--muted);font-size:15.5px}
.tl-item .tl-dot{position:absolute;left:22px;top:60px;width:8px;height:8px;border-radius:50%;background:var(--magenta);display:none}
@media(min-width:900px){.tl-item .tl-dot{display:none}}

/* ---------- compare ---------- */
.compare{border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--card)}
.compare-row{display:grid;grid-template-columns:1.2fr 1.4fr .8fr 1.2fr;gap:16px;padding:20px 24px;border-bottom:1px solid var(--line);align-items:center;transition:background .2s ease}
.compare-row:last-child{border-bottom:0}
.compare-row:hover{background:rgba(45,226,230,.05)}
.compare-head{background:rgba(255,255,255,.03);font-size:13px;letter-spacing:.1em;color:var(--dim);text-transform:uppercase}
.compare-row strong{font-weight:600;color:var(--text);font-size:15.5px}
.compare-row span{color:var(--muted);font-size:15px}
.compare-row .hl{color:var(--cyan)}
@media(max-width:900px){
  .compare-head{display:none}
  .compare-row{grid-template-columns:1fr;gap:8px;padding:20px}
  .compare-row span::before{content:attr(data-label);display:block;font-size:12.5px;color:var(--dim);letter-spacing:.08em;margin-bottom:2px}
}

/* ---------- checklist ---------- */
.check-grid{display:grid;gap:20px}
@media(min-width:768px){.check-grid{grid-template-columns:repeat(2,1fr)}}
.check-item{
  display:flex;gap:16px;padding:22px;border-radius:var(--r-md);
  border:1px solid var(--line);background:rgba(255,255,255,.02);
  transition:border-color .2s ease,transform .2s ease;
}
.check-item:hover{border-color:rgba(255,79,154,.4);transform:translateY(-3px)}
.check-num{
  width:30px;height:30px;flex:none;border-radius:9px;display:grid;place-items:center;
  background:rgba(255,79,154,.12);border:1px solid rgba(255,79,154,.28);
  color:var(--magenta);font-size:13.5px;font-weight:700;
}
.check-item h3{font-size:16.5px;margin-bottom:6px}
.check-item p{color:var(--muted);font-size:15px}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line);max-width:900px}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:24px 4px;font-size:17px;font-weight:600;cursor:pointer;list-style:none;
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--cyan)}
.faq-arrow{
  width:26px;height:26px;flex:none;border-radius:50%;border:1px solid var(--line-strong);
  display:grid;place-items:center;font-size:12px;color:var(--muted);
  transition:transform .25s ease,border-color .25s ease,color .25s ease;
}
.faq-item[open] summary{color:var(--cyan)}
.faq-item[open] .faq-arrow{transform:rotate(180deg);border-color:var(--cyan);color:var(--cyan)}
.faq-body{padding:0 4px 26px;color:var(--muted);font-size:15.5px;max-width:760px}

/* ---------- CTA band ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:
    radial-gradient(700px 300px at 20% 0%,rgba(45,226,230,.14),transparent 60%),
    radial-gradient(600px 300px at 88% 100%,rgba(215,255,63,.1),transparent 62%),
    var(--panel);
}
.cta-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;padding:52px 0}
.cta-inner h2{max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;align-items:center;gap:18px}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);border-top:1px solid var(--line);padding:64px 0 32px;margin-top:0}
.footer-grid{display:grid;gap:36px}
@media(min-width:768px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}
.footer-brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:17px;margin-bottom:16px}
.footer-brand .brand-mark{width:26px;height:26px;border-radius:8px}
.footer-brand .brand-mark::after{inset:8px}
.footer-about{color:var(--dim);font-size:14.5px;max-width:400px;line-height:1.8}
.footer-col h4{font-size:14px;letter-spacing:.08em;color:var(--text);margin-bottom:16px}
.footer-col a{display:block;color:var(--muted);font-size:14.5px;padding:7px 0}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  border-top:1px solid var(--line);margin-top:48px;padding-top:24px;
  color:var(--dim);font-size:13.5px;
}
.footer-note{color:var(--dim)}

/* roulang page: category3 */
:root{
    --bg:#0B0F14;
    --bg2:#11161F;
    --card:#151C26;
    --deep:#070A0E;
    --line:rgba(255,255,255,0.08);
    --line-strong:rgba(255,255,255,0.16);
    --text:#F4F7FB;
    --muted:#A8B2C1;
    --dim:#6F7A8A;
    --cyan:#2DE2E6;
    --magenta:#FF4F9A;
    --lime:#D7FF3F;
    --radius-card:18px;
    --radius-btn:12px;
    --shadow-card:0 16px 40px rgba(0,0,0,.35);
    --shadow-glow:0 0 0 1px rgba(45,226,230,.10);
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:
      radial-gradient(1100px 620px at 82% -8%, rgba(45,226,230,.09), transparent 62%),
      radial-gradient(820px 520px at 6% 12%, rgba(255,79,154,.06), transparent 60%),
      var(--bg);
    color:var(--text);
    font-family:'HarmonyOS Sans SC','Noto Sans SC','PingFang SC','Microsoft YaHei','Inter',sans-serif;
    font-size:16.5px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;border-radius:14px}
  a{color:inherit;text-decoration:none;transition:color .22s ease,opacity .22s ease}
  button,input,textarea,select{font:inherit;color:inherit}
  h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.16;letter-spacing:.01em}
  p{margin:0}
  ul{margin:0;padding:0;list-style:none}
  ::selection{background:rgba(45,226,230,.28)}
  :focus-visible{outline:2px solid var(--cyan);outline-offset:3px;border-radius:6px}

  .container{
    width:100%;
    max-width:1280px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:768px){.container{padding-left:32px;padding-right:32px}}
  @media (min-width:1024px){.container{padding-left:48px;padding-right:48px}}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(9,12,17,.82);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:24px;
    min-height:76px;
    padding-top:10px;
    padding-bottom:10px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:11px;
    font-size:17px;
    font-weight:800;
    letter-spacing:.02em;
    white-space:nowrap;
  }
  .brand-mark{
    width:12px;height:12px;border-radius:3px;
    background:linear-gradient(135deg,var(--cyan),var(--lime));
    box-shadow:0 0 14px rgba(45,226,230,.55);
    flex:none;
  }
  .brand em{font-style:normal;color:var(--cyan)}
  .nav-links{
    display:none;
    align-items:center;
    gap:6px;
  }
  .nav-link{
    position:relative;
    display:inline-block;
    padding:9px 13px;
    font-size:14.5px;
    letter-spacing:.02em;
    color:var(--muted);
    border-radius:999px;
    transition:color .2s ease,background .2s ease;
  }
  .nav-link:hover{color:var(--text);background:rgba(255,255,255,.05)}
  .nav-link.active{color:var(--text);background:rgba(45,226,230,.10)}
  .nav-link.active::after{
    content:"";
    position:absolute;
    left:13px;right:13px;bottom:3px;
    height:2px;border-radius:2px;
    background:linear-gradient(90deg,var(--cyan),rgba(45,226,230,0));
  }
  .header-cta{
    display:none;
    align-items:center;
    gap:8px;
    padding:9px 16px;
    font-size:14px;
    border:1px solid var(--line-strong);
    border-radius:999px;
    color:var(--text);
    transition:border-color .2s ease,box-shadow .2s ease,transform .2s ease;
  }
  .header-cta:hover{border-color:rgba(45,226,230,.6);box-shadow:0 0 0 3px rgba(45,226,230,.10);transform:translateY(-1px)}
  .menu-toggle{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:42px;height:42px;
    background:transparent;
    border:1px solid var(--line-strong);
    border-radius:12px;
    cursor:pointer;
    color:var(--text);
  }
  .menu-toggle:hover{border-color:rgba(45,226,230,.5)}
  .mobile-nav{
    display:none;
    border-top:1px solid var(--line);
    background:rgba(7,10,14,.96);
  }
  .mobile-nav.open{display:block}
  .mobile-nav .container{display:flex;flex-direction:column;padding-top:10px;padding-bottom:16px}
  .mobile-nav a{
    padding:13px 4px;
    border-bottom:1px solid var(--line);
    color:var(--muted);
    font-size:15px;
  }
  .mobile-nav a.active{color:var(--cyan)}
  @media (min-width:1024px){
    .nav-links{display:flex}
    .header-cta{display:inline-flex}
    .menu-toggle{display:none}
    .mobile-nav{display:none !important}
  }

  /* ---------- generic ---------- */
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:9px;
    padding:6px 14px;
    border:1px solid var(--line-strong);
    border-radius:999px;
    font-size:13px;
    letter-spacing:.06em;
    color:var(--muted);
    background:rgba(255,255,255,.02);
  }
  .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
  .section{padding-top:72px;padding-bottom:72px}
  @media (min-width:1024px){.section{padding-top:104px;padding-bottom:104px}}
  .section-head{max-width:760px}
  .section-title{
    font-size:clamp(1.5rem,3vw,2.25rem);
    font-weight:700;
    margin-top:14px;
  }
  .section-sub{margin-top:14px;color:var(--muted);font-size:16px}
  .hairline{height:1px;background:var(--line);border:0;margin:0}

  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:9px;
    padding:13px 24px;
    border-radius:var(--radius-btn);
    font-size:15px;
    font-weight:600;
    letter-spacing:.02em;
    cursor:pointer;
    border:1px solid transparent;
    transition:transform .2s ease,background .2s ease,box-shadow .2s ease,border-color .2s ease,color .2s ease;
  }
  .btn-primary{
    background:var(--cyan);
    color:#04161A;
    box-shadow:0 10px 26px rgba(45,226,230,.22);
  }
  .btn-primary:hover{background:#4ff0f3;transform:translateY(-2px);box-shadow:0 14px 32px rgba(45,226,230,.3)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{
    background:transparent;
    border-color:var(--line-strong);
    color:var(--text);
  }
  .btn-ghost:hover{border-color:rgba(45,226,230,.55);background:rgba(45,226,230,.06);transform:translateY(-2px)}
  .btn-text{
    display:inline-flex;
    align-items:center;
    gap:8px;
    color:var(--cyan);
    font-size:15px;
    font-weight:600;
    padding:6px 2px;
    border-bottom:1px solid rgba(45,226,230,.35);
  }
  .btn-text i{transition:transform .2s ease}
  .btn-text:hover i{transform:translateX(4px)}

  .tag{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 11px;
    border-radius:999px;
    font-size:12.5px;
    letter-spacing:.03em;
    color:var(--cyan);
    background:rgba(45,226,230,.10);
    border:1px solid rgba(45,226,230,.24);
  }
  .tag-pink{color:var(--magenta);background:rgba(255,79,154,.10);border-color:rgba(255,79,154,.26)}
  .tag-lime{color:var(--lime);background:rgba(215,255,63,.09);border-color:rgba(215,255,63,.24)}

  .card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    box-shadow:var(--shadow-card),var(--shadow-glow);
    transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
  }
  .card:hover{transform:translateY(-4px);border-color:rgba(45,226,230,.35);box-shadow:0 22px 48px rgba(0,0,0,.45),0 0 0 1px rgba(45,226,230,.18)}

  /* ---------- breadcrumb ---------- */
  .crumb{
    padding-top:22px;
    font-size:13px;
    color:var(--dim);
    letter-spacing:.02em;
  }
  .crumb a:hover{color:var(--cyan)}
  .crumb span{margin:0 8px;opacity:.5}

  /* ---------- hero ---------- */
  .hero{
    position:relative;
    overflow:hidden;
    padding-bottom:56px;
  }
  .hero-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:36px;
    align-items:center;
    padding-top:38px;
  }
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:56px;padding-top:58px}
  }
  .hero h1{
    font-size:clamp(2rem,5vw,3.4rem);
    font-weight:800;
    line-height:1.12;
    margin-top:20px;
  }
  .hero h1 em{
    font-style:normal;
    background:linear-gradient(100deg,var(--cyan),var(--lime));
    -webkit-background-clip:text;
    background-clip:text;
    color:transparent;
  }
  .hero-lead{
    margin-top:20px;
    font-size:clamp(1rem,1.6vw,1.15rem);
    color:var(--muted);
    max-width:560px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
  .hero-facts{
    display:flex;
    flex-wrap:wrap;
    gap:26px;
    margin-top:36px;
    padding-top:26px;
    border-top:1px solid var(--line);
  }
  .hero-fact strong{display:block;font-size:22px;font-weight:800;color:var(--cyan)}
  .hero-fact span{font-size:13px;color:var(--dim);letter-spacing:.04em}
  .hero-visual{position:relative}
  .hero-visual img{
    width:100%;
    aspect-ratio:16/11;
    object-fit:cover;
    border-radius:20px;
    border:1px solid var(--line);
    box-shadow:0 26px 60px rgba(0,0,0,.5);
  }
  .hero-visual::after{
    content:"";
    position:absolute;
    inset:auto -14px -14px auto;
    width:120px;height:120px;
    border-radius:24px;
    border:1px solid rgba(45,226,230,.28);
    background:radial-gradient(circle at 30% 30%,rgba(45,226,230,.18),transparent 70%);
    pointer-events:none;
  }
  .scanline{
    position:absolute;
    inset:0;
    border-radius:20px;
    background:repeating-linear-gradient(180deg,rgba(255,255,255,.035) 0 1px,transparent 1px 5px);
    pointer-events:none;
    mix-blend-mode:overlay;
  }

  /* ---------- filter ---------- */
  .filter-bar{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin-top:30px;
  }
  .filter-btn{
    padding:9px 17px;
    border-radius:999px;
    border:1px solid var(--line-strong);
    background:rgba(255,255,255,.02);
    color:var(--muted);
    font-size:14px;
    cursor:pointer;
    transition:all .22s ease;
  }
  .filter-btn:hover{color:var(--text);border-color:rgba(45,226,230,.45)}
  .filter-btn.active{
    color:#04161A;
    background:var(--cyan);
    border-color:var(--cyan);
    font-weight:700;
    box-shadow:0 8px 20px rgba(45,226,230,.22);
  }

  /* ---------- masonry gallery ---------- */
  .gallery{
    margin-top:38px;
    columns:1;
    column-gap:22px;
  }
  @media (min-width:700px){.gallery{columns:2}}
  @media (min-width:1080px){.gallery{columns:3}}
  .gallery-item{
    break-inside:avoid;
    margin-bottom:22px;
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    overflow:hidden;
    box-shadow:var(--shadow-card);
    transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease,opacity .3s ease;
  }
  .gallery-item:hover{transform:translateY(-4px);border-color:rgba(45,226,230,.38);box-shadow:0 24px 48px rgba(0,0,0,.46),0 0 0 1px rgba(45,226,230,.16)}
  .gallery-item.hidden-item{display:none}
  .thumb{
    position:relative;
    overflow:hidden;
  }
  .thumb img{
    width:100%;
    border-radius:0;
    object-fit:cover;
    transition:transform .5s ease,filter .5s ease;
  }
  .gallery-item:hover .thumb img{transform:scale(1.06);filter:saturate(1.1)}
  .thumb::after{
    content:"";
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(7,10,14,0) 42%,rgba(7,10,14,.82) 100%);
    opacity:.7;
    transition:opacity .3s ease;
  }
  .gallery-item:hover .thumb::after{opacity:.95}
  .thumb-label{
    position:absolute;
    left:14px;
    bottom:12px;
    z-index:2;
    display:flex;
    align-items:center;
    gap:8px;
    font-size:12.5px;
    letter-spacing:.04em;
    color:var(--cyan);
  }
  .gallery-body{padding:20px 20px 22px}
  .gallery-body h3{font-size:1.15rem;font-weight:600}
  .gallery-body p{margin-top:10px;font-size:14.5px;color:var(--muted);line-height:1.75}
  .gallery-meta{
    display:flex;
    align-items:center;
    justify-content:space-between;
    margin-top:16px;
    padding-top:14px;
    border-top:1px solid var(--line);
    font-size:12.5px;
    color:var(--dim);
  }
  .gallery-meta a{color:var(--cyan);font-weight:600;display:inline-flex;align-items:center;gap:6px}
  .gallery-meta a i{transition:transform .2s ease}
  .gallery-meta a:hover i{transform:translateX(4px)}

  /* ---------- feature strip ---------- */
  .feature-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
    margin-top:40px;
  }
  @media (min-width:700px){.feature-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1080px){.feature-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
  .feature-card{
    padding:26px 22px;
    background:linear-gradient(180deg,rgba(21,28,38,.95),rgba(17,22,31,.95));
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    transition:transform .26s ease,border-color .26s ease;
  }
  .feature-card:hover{transform:translateY(-4px);border-color:rgba(45,226,230,.32)}
  .feature-icon{
    width:44px;height:44px;
    display:flex;align-items:center;justify-content:center;
    border-radius:13px;
    color:var(--cyan);
    background:rgba(45,226,230,.10);
    border:1px solid rgba(45,226,230,.22);
    font-size:17px;
  }
  .feature-card h3{margin-top:18px;font-size:1.06rem;font-weight:600}
  .feature-card p{margin-top:9px;font-size:14px;color:var(--muted);line-height:1.75}

  /* ---------- scenario ---------- */
  .scenario-wrap{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
    margin-top:40px;
  }
  @media (min-width:900px){.scenario-wrap{grid-template-columns:repeat(3,minmax(0,1fr))}}
  .scenario{
    position:relative;
    padding:28px 24px 26px;
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    background:var(--bg2);
    overflow:hidden;
  }
  .scenario::before{
    content:"";
    position:absolute;
    left:0;top:0;bottom:0;
    width:3px;
    background:linear-gradient(180deg,var(--cyan),transparent);
  }
  .scenario h3{font-size:1.08rem;font-weight:600}
  .scenario p{margin-top:12px;font-size:14.5px;color:var(--muted)}
  .scenario ul{margin-top:16px;display:flex;flex-direction:column;gap:10px}
  .scenario li{
    display:flex;
    gap:10px;
    font-size:14px;
    color:var(--muted);
  }
  .scenario li i{color:var(--lime);margin-top:8px;font-size:10px}

  /* ---------- faq ---------- */
  .faq-list{
    margin-top:34px;
    border-top:1px solid var(--line);
  }
  .faq-item{
    border-bottom:1px solid var(--line);
  }
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:22px 4px;
    font-size:1.05rem;
    font-weight:600;
    transition:color .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:hover{color:var(--cyan)}
  .faq-item summary .chev{
    flex:none;
    width:28px;height:28px;
    display:flex;align-items:center;justify-content:center;
    border-radius:50%;
    border:1px solid var(--line-strong);
    color:var(--cyan);
    font-size:12px;
    transition:transform .26s ease,border-color .26s ease;
  }
  .faq-item[open] summary{color:var(--cyan)}
  .faq-item[open] summary .chev{transform:rotate(180deg);border-color:rgba(45,226,230,.6)}
  .faq-item p{
    padding:0 4px 24px;
    font-size:15px;
    color:var(--muted);
    max-width:900px;
  }

  /* ---------- cta ---------- */
  .cta-band{
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    background:
      radial-gradient(760px 320px at 12% 0%,rgba(45,226,230,.13),transparent 62%),
      radial-gradient(620px 300px at 88% 100%,rgba(255,79,154,.10),transparent 62%),
      var(--deep);
    padding-top:64px;
    padding-bottom:64px;
  }
  .cta-inner{
    display:flex;
    flex-direction:column;
    gap:26px;
    align-items:flex-start;
  }
  @media (min-width:900px){
    .cta-inner{flex-direction:row;align-items:center;justify-content:space-between;gap:44px}
  }
  .cta-inner h2{font-size:clamp(1.4rem,2.6vw,2rem);font-weight:700}
  .cta-inner p{margin-top:12px;color:var(--muted);font-size:15.5px;max-width:640px}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex:none}

  /* ---------- footer ---------- */
  .site-footer{
    background:var(--deep);
    border-top:1px solid var(--line);
    padding-top:60px;
    padding-bottom:28px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:36px;
  }
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
  @media (min-width:1080px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:44px}}
  .footer-brand{
    display:flex;
    align-items:center;
    gap:11px;
    font-size:17px;
    font-weight:800;
  }
  .footer-about{
    margin-top:18px;
    font-size:14px;
    color:var(--muted);
    max-width:420px;
    line-height:1.85;
  }
  .footer-col h4{
    font-size:14px;
    font-weight:600;
    letter-spacing:.08em;
    color:var(--dim);
    margin-bottom:16px;
  }
  .footer-col a{
    display:block;
    padding:7px 0;
    font-size:14.5px;
    color:var(--muted);
  }
  .footer-col a:hover{color:var(--cyan);transform:translateX(2px)}
  .footer-bottom{
    display:flex;
    flex-direction:column;
    gap:10px;
    margin-top:48px;
    padding-top:22px;
    border-top:1px solid var(--line);
    font-size:13px;
    color:var(--dim);
  }
  @media (min-width:768px){.footer-bottom{flex-direction:row;align-items:center;justify-content:space-between}}
  .footer-note{opacity:.85}

  .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
  .reveal.in{opacity:1;transform:none}
  @media (prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none}
    *{animation:none !important}
  }

/* roulang page: category4 */
:root{
    --ink:#0B0F14;
    --ink-2:#11161F;
    --card:#151C26;
    --footer-bg:#070A0E;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.16);
    --text:#F4F7FB;
    --muted:#A8B2C1;
    --dim:#6F7A8A;
    --cyan:#2DE2E6;
    --magenta:#FF4F9A;
    --acid:#D7FF3F;
    --radius-lg:18px;
    --radius-md:14px;
    --radius-sm:10px;
    --shadow:0 16px 40px rgba(0,0,0,.35);
    --ring:0 0 0 1px rgba(45,226,230,.10);
    --maxw:1240px;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--ink);
    color:var(--text);
    font-family:"HarmonyOS Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",Inter,system-ui,-apple-system,sans-serif;
    font-size:17px;
    line-height:1.85;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input,select,textarea{font:inherit;color:inherit;}
  h1,h2,h3,h4{margin:0;font-weight:700;line-height:1.25;letter-spacing:.01em;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  ::selection{background:rgba(45,226,230,.28);color:#fff;}

  .container{
    width:100%;
    max-width:var(--maxw);
    margin:0 auto;
    padding:0 48px;
  }

  /* ============ 顶部导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    background:rgba(11,15,20,.84);
    backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    min-height:76px;
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-size:17px;
    font-weight:700;
    letter-spacing:.02em;
    white-space:nowrap;
  }
  .brand em{font-style:normal;color:var(--cyan);}
  .brand-mark{
    width:12px;height:12px;border-radius:3px;
    background:linear-gradient(135deg,var(--cyan),var(--magenta));
    box-shadow:0 0 14px rgba(45,226,230,.55);
    flex:0 0 auto;
  }
  .nav-links{
    display:flex;
    align-items:center;
    gap:34px;
  }
  .nav-link{
    position:relative;
    font-size:14.5px;
    letter-spacing:.02em;
    color:var(--muted);
    padding:6px 0;
    transition:color .22s ease;
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;right:0;bottom:-2px;
    height:2px;
    border-radius:2px;
    background:linear-gradient(90deg,var(--cyan),rgba(45,226,230,0));
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .25s ease;
  }
  .nav-link:hover{color:var(--text);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.active{color:var(--text);font-weight:600;}
  .nav-link.active::after{transform:scaleX(1);}
  .header-actions{display:flex;align-items:center;gap:14px;}
  .nav-toggle{
    display:none;
    width:42px;height:42px;
    border:1px solid var(--line-strong);
    border-radius:var(--radius-sm);
    background:transparent;
    cursor:pointer;
    align-items:center;
    justify-content:center;
    transition:border-color .2s ease,background .2s ease;
  }
  .nav-toggle:hover{border-color:rgba(45,226,230,.5);background:rgba(45,226,230,.06);}
  .nav-toggle i{font-size:16px;color:var(--text);}
  .mobile-drawer{
    display:none;
    border-top:1px solid var(--line);
    background:rgba(7,10,14,.96);
    padding:10px 0 18px;
  }
  .mobile-drawer.open{display:block;}
  .mobile-drawer a{
    display:block;
    padding:12px 0;
    font-size:15px;
    color:var(--muted);
    border-bottom:1px solid var(--line);
  }
  .mobile-drawer a:last-child{border-bottom:none;}
  .mobile-drawer a.active{color:var(--cyan);}

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 24px;
    border-radius:var(--radius-sm);
    font-size:15px;
    font-weight:600;
    letter-spacing:.02em;
    border:1px solid transparent;
    cursor:pointer;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
    white-space:nowrap;
  }
  .btn i{font-size:13px;transition:transform .2s ease;}
  .btn-primary{
    background:var(--cyan);
    color:#06232a;
    box-shadow:0 10px 26px rgba(45,226,230,.18);
  }
  .btn-primary:hover{background:#4eeaed;transform:translateY(-2px);box-shadow:0 14px 30px rgba(45,226,230,.28);}
  .btn-primary:hover i{transform:translateX(3px);}
  .btn-primary:active{transform:translateY(0);}
  .btn-ghost{
    background:transparent;
    color:var(--text);
    border-color:var(--line-strong);
  }
  .btn-ghost:hover{border-color:rgba(45,226,230,.55);background:rgba(45,226,230,.07);transform:translateY(-2px);}
  .btn-sm{padding:9px 18px;font-size:14px;}
  .btn-block{width:100%;}
  .btn-link{
    display:inline-flex;align-items:center;gap:6px;
    color:var(--cyan);font-size:14.5px;font-weight:600;
  }
  .btn-link i{transition:transform .2s ease;font-size:12px;}
  .btn-link:hover i{transform:translateX(4px);}
  .btn:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible,button:focus-visible{
    outline:2px solid var(--cyan);
    outline-offset:3px;
  }

  /* ============ 面包屑 ============ */
  .crumb{
    display:flex;flex-wrap:wrap;align-items:center;gap:8px;
    font-size:13px;color:var(--dim);
    margin-bottom:22px;
  }
  .crumb a{color:var(--muted);transition:color .2s ease;}
  .crumb a:hover{color:var(--cyan);}
  .crumb span.sep{color:rgba(255,255,255,.2);}

  /* ============ Hero ============ */
  .hero{
    position:relative;
    overflow:hidden;
    border-bottom:1px solid var(--line);
    background:
      radial-gradient(880px 420px at 80% 10%, rgba(45,226,230,.11), transparent 62%),
      radial-gradient(620px 340px at 6% 92%, rgba(255,79,154,.09), transparent 60%),
      linear-gradient(180deg,#0B0F14 0%,#0D131B 100%);
  }
  .hero::before{
    content:"";
    position:absolute;inset:0;
    background-image:
      linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
    background-size:64px 64px;
    mask-image:radial-gradient(720px 400px at 70% 20%,#000 12%,transparent 78%);
    -webkit-mask-image:radial-gradient(720px 400px at 70% 20%,#000 12%,transparent 78%);
    pointer-events:none;
  }
  .hero-inner{
    position:relative;
    display:grid;
    grid-template-columns:1.05fr .95fr;
    gap:56px;
    align-items:center;
    padding:76px 0 84px;
  }
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    padding:6px 14px;
    border:1px solid rgba(45,226,230,.28);
    border-radius:999px;
    font-size:13px;
    letter-spacing:.06em;
    color:var(--cyan);
    background:rgba(45,226,230,.06);
    margin-bottom:22px;
  }
  .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 10px var(--cyan);}
  .hero h1{
    font-size:clamp(2rem,4.4vw,3.35rem);
    font-weight:800;
    line-height:1.12;
    margin-bottom:20px;
  }
  .hero h1 .hl{color:var(--cyan);}
  .hero-sub{
    font-size:17px;
    color:var(--muted);
    max-width:560px;
    margin-bottom:26px;
  }
  .hero-points{
    display:flex;flex-wrap:wrap;gap:10px 22px;
    margin-bottom:32px;
  }
  .hero-points li{
    display:flex;align-items:center;gap:8px;
    font-size:14px;color:var(--muted);
  }
  .hero-points i{color:var(--acid);font-size:13px;}
  .hero-cta{display:flex;flex-wrap:wrap;gap:14px;}
  .hero-visual{
    position:relative;
    border-radius:var(--radius-lg);
    overflow:hidden;
    border:1px solid var(--line);
    box-shadow:var(--shadow),var(--ring);
    aspect-ratio:16/11;
    background:var(--ink-2);
  }
  .hero-visual img{width:100%;height:100%;object-fit:cover;opacity:.94;}
  .hero-visual::after{
    content:"";
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(11,15,20,0) 40%,rgba(11,15,20,.72) 100%);
  }
  .hero-tag{
    position:absolute;
    left:20px;bottom:20px;
    z-index:2;
    display:flex;flex-wrap:wrap;gap:10px;
  }
  .tag{
    display:inline-flex;align-items:center;gap:6px;
    padding:5px 12px;
    border-radius:999px;
    font-size:12.5px;
    letter-spacing:.02em;
    border:1px solid var(--line-strong);
    background:rgba(11,15,20,.65);
    color:var(--muted);
  }
  .tag.accent{color:var(--cyan);border-color:rgba(45,226,230,.4);background:rgba(45,226,230,.1);}
  .tag.acid{color:var(--acid);border-color:rgba(215,255,63,.35);background:rgba(215,255,63,.08);}
  .tag.magenta{color:var(--magenta);border-color:rgba(255,79,154,.35);background:rgba(255,79,154,.08);}

  /* ============ 板块通用 ============ */
  .section{padding:92px 0;}
  .section.tight{padding:64px 0;}
  .section-alt{background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
  .section-head{max-width:720px;margin-bottom:44px;}
  .section-head .kicker{
    display:inline-block;
    font-size:13px;
    letter-spacing:.14em;
    color:var(--cyan);
    margin-bottom:12px;
    text-transform:uppercase;
  }
  .section-head h2{
    font-size:clamp(1.5rem,2.6vw,2.15rem);
    font-weight:700;
    margin-bottom:14px;
  }
  .section-head p{color:var(--muted);font-size:16px;}

  /* ============ 双栏：表单 + 信息卡 ============ */
  .support-grid{
    display:grid;
    grid-template-columns:1.15fr .85fr;
    gap:28px;
    align-items:start;
  }
  .card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    box-shadow:var(--shadow);
  }
  .form-card{padding:34px;}
  .form-card h3{
    font-size:1.3rem;
    font-weight:700;
    margin-bottom:8px;
  }
  .form-card .hint{
    font-size:14px;
    color:var(--dim);
    margin-bottom:26px;
  }
  .form-row{margin-bottom:18px;}
  .form-row label{
    display:block;
    font-size:14px;
    color:var(--muted);
    margin-bottom:8px;
    letter-spacing:.02em;
  }
  .form-row input,
  .form-row select,
  .form-row textarea{
    width:100%;
    background:#101720;
    border:1px solid var(--line);
    border-radius:var(--radius-sm);
    padding:12px 14px;
    font-size:15px;
    color:var(--text);
    transition:border-color .22s ease,box-shadow .22s ease,background .22s ease;
  }
  .form-row textarea{resize:vertical;min-height:120px;line-height:1.75;}
  .form-row input::placeholder,
  .form-row textarea::placeholder{color:#5b6675;}
  .form-row input:hover,
  .form-row select:hover,
  .form-row textarea:hover{border-color:var(--line-strong);}
  .form-row input:focus,
  .form-row select:focus,
  .form-row textarea:focus{
    outline:none;
    border-color:rgba(45,226,230,.65);
    background:#121a24;
    box-shadow:0 0 0 3px rgba(45,226,230,.13);
  }
  .checkbox{
    display:flex;align-items:flex-start;gap:10px;
    font-size:13.5px;color:var(--dim);
    margin:6px 0 22px;
    line-height:1.65;
  }
  .checkbox input{margin-top:4px;accent-color:#2DE2E6;width:15px;height:15px;}
  .form-status{
    margin-top:14px;
    font-size:14px;
    color:var(--cyan);
    min-height:20px;
  }
  .form-status.error{color:var(--magenta);}

  .side{display:grid;gap:20px;}
  .info-card{padding:26px;}
  .info-card h3{
    font-size:1.05rem;
    font-weight:600;
    margin-bottom:18px;
    display:flex;align-items:center;gap:10px;
  }
  .info-card h3 i{color:var(--cyan);font-size:15px;}
  .info-list li{
    display:flex;justify-content:space-between;
    gap:14px;
    padding:12px 0;
    border-bottom:1px dashed var(--line);
    font-size:14.5px;
    color:var(--muted);
  }
  .info-list li:last-child{border-bottom:none;padding-bottom:0;}
  .info-list strong{color:var(--text);font-weight:600;}
  .guard-card{
    border-color:rgba(215,255,63,.22);
    background:linear-gradient(180deg,rgba(215,255,63,.05),rgba(21,28,38,1) 60%);
  }
  .guard-card h3 i{color:var(--acid);}
  .guard-card p{font-size:14.5px;color:var(--muted);}
  .guard-card ul{margin-top:16px;display:grid;gap:10px;}
  .guard-card li{
    display:flex;gap:9px;
    font-size:14px;color:var(--muted);
  }
  .guard-card li i{color:var(--acid);font-size:12px;margin-top:6px;}

  /* ============ 服务范围卡片 ============ */
  .scope-grid{
    display:grid;
    grid-template-columns:repeat(2,1fr);
    gap:24px;
  }
  .scope-card{
    position:relative;
    display:grid;
    grid-template-columns:132px 1fr;
    gap:22px;
    padding:20px;
    border:1px solid var(--line);
    border-radius:var(--radius-lg);
    background:var(--card);
    transition:transform .28s ease,border-color .28s ease,box-shadow .28s ease;
  }
  .scope-card:nth-child(2){transform:translateY(18px);}
  .scope-card:nth-child(4){transform:translateY(18px);}
  .scope-card:hover{
    transform:translateY(-4px);
    border-color:rgba(45,226,230,.35);
    box-shadow:0 18px 40px rgba(0,0,0,.42);
  }
  .scope-card:nth-child(2):hover,
  .scope-card:nth-child(4):hover{transform:translateY(14px);}
  .scope-thumb{
    border-radius:var(--radius-md);
    overflow:hidden;
    aspect-ratio:1/1;
    background:var(--ink-2);
    border:1px solid var(--line);
  }
  .scope-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease;}
  .scope-card:hover .scope-thumb img{transform:scale(1.06);}
  .scope-body h3{font-size:1.08rem;margin-bottom:8px;}
  .scope-body p{font-size:14.5px;color:var(--muted);margin-bottom:12px;}
  .scope-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:12px;}

  /* ============ 保障条 ============ */
  .guard-strip{
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
    background:var(--ink-2);
  }
  .guard-grid{
    display:grid;
    grid-template-columns:repeat(4,1fr);
    gap:0;
  }
  .guard-item{
    padding:32px 26px;
    border-right:1px solid var(--line);
    transition:background .25s ease;
  }
  .guard-item:last-child{border-right:none;}
  .guard-item:hover{background:rgba(45,226,230,.04);}
  .guard-item i{
    display:inline-flex;align-items:center;justify-content:center;
    width:38px;height:38px;
    border-radius:11px;
    background:rgba(45,226,230,.1);
    border:1px solid rgba(45,226,230,.22);
    color:var(--cyan);
    font-size:15px;
    margin-bottom:14px;
  }
  .guard-item h3{font-size:15.5px;margin-bottom:8px;}
  .guard-item p{font-size:13.5px;color:var(--dim);line-height:1.7;}

  /* ============ FAQ ============ */
  .faq-list{
    border-top:1px solid var(--line);
    max-width:900px;
  }
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-item summary{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:22px 4px;
    cursor:pointer;
    font-size:16.5px;
    font-weight:600;
    list-style:none;
    transition:color .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary:hover{color:var(--cyan);}
  .faq-item summary .qmark{
    flex:0 0 auto;
    width:26px;height:26px;
    border-radius:50%;
    border:1px solid var(--line-strong);
    display:inline-flex;align-items:center;justify-content:center;
    color:var(--muted);
    font-size:12px;
    transition:transform .28s ease,color .2s ease,border-color .2s ease;
  }
  .faq-item[open] summary{color:var(--text);}
  .faq-item[open] summary .qmark{
    transform:rotate(180deg);
    color:var(--cyan);
    border-color:rgba(45,226,230,.5);
    background:rgba(45,226,230,.08);
  }
  .faq-answer{
    padding:0 4px 24px;
    font-size:15px;
    color:var(--muted);
    max-width:780px;
  }

  /* ============ CTA 通栏 ============ */
  .cta-band{
    background:
      radial-gradient(700px 300px at 85% 20%, rgba(45,226,230,.13), transparent 65%),
      linear-gradient(120deg,#0E141C 0%,#131A24 100%);
    border-top:1px solid var(--line);
    border-bottom:1px solid var(--line);
  }
  .cta-inner{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:32px;
    padding:56px 0;
    flex-wrap:wrap;
  }
  .cta-inner h2{font-size:clamp(1.35rem,2.4vw,1.9rem);margin-bottom:10px;}
  .cta-inner p{color:var(--muted);font-size:15.5px;max-width:620px;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--footer-bg);
    border-top:1px solid var(--line);
    padding:68px 0 30px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1fr;
    gap:40px;
    padding-bottom:44px;
    border-bottom:1px solid var(--line);
  }
  .footer-brand{
    display:flex;align-items:center;gap:10px;
    font-size:17px;font-weight:700;
    margin-bottom:16px;
  }
  .footer-about{
    font-size:14px;
    color:var(--dim);
    line-height:1.85;
    max-width:360px;
  }
  .footer-col h4{
    font-size:14px;
    letter-spacing:.06em;
    color:var(--text);
    margin-bottom:16px;
    font-weight:600;
  }
  .footer-col a{
    display:block;
    font-size:14px;
    color:var(--muted);
    padding:6px 0;
    transition:color .2s ease,transform .2s ease;
  }
  .footer-col a:hover{color:var(--cyan);transform:translateX(3px);}
  .footer-bottom{
    display:flex;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:12px;
    padding-top:24px;
    font-size:13px;
    color:var(--dim);
  }
  .footer-note{color:#5a6472;}

  /* ============ 响应式 ============ */
  @media (max-width:1180px){
    .container{padding:0 32px;}
    .nav-links{gap:24px;}
  }
  @media (max-width:1024px){
    .hero-inner{grid-template-columns:1fr;gap:40px;padding:56px 0 64px;}
    .hero-sub{max-width:none;}
    .support-grid{grid-template-columns:1fr;}
    .footer-grid{grid-template-columns:1fr 1fr;gap:34px;}
    .section{padding:72px 0;}
  }
  @media (max-width:900px){
    .scope-grid{grid-template-columns:1fr;}
    .scope-card:nth-child(2),
    .scope-card:nth-child(4){transform:none;}
    .scope-card:nth-child(2):hover,
    .scope-card:nth-child(4):hover{transform:translateY(-4px);}
    .guard-grid{grid-template-columns:1fr 1fr;}
    .guard-item{border-bottom:1px solid var(--line);}
    .guard-item:nth-child(2){border-right:none;}
    .guard-item:nth-child(3),
    .guard-item:nth-child(4){border-bottom:none;}
  }
  @media (max-width:768px){
    .container{padding:0 20px;}
    .nav-links{display:none;}
    .nav-toggle{display:inline-flex;}
    .header-inner{min-height:68px;}
    body{font-size:16px;}
    .form-card{padding:24px;}
    .section{padding:56px 0;}
    .section-head{margin-bottom:32px;}
    .cta-inner{padding:44px 0;}
  }
  @media (max-width:520px){
    .hero h1{font-size:1.9rem;}
    .hero-cta .btn{width:100%;}
    .scope-card{grid-template-columns:1fr;}
    .scope-thumb{aspect-ratio:16/10;}
    .guard-grid{grid-template-columns:1fr;}
    .guard-item{border-right:none;border-bottom:1px solid var(--line);}
    .guard-item:last-child{border-bottom:none;}
    .footer-grid{grid-template-columns:1fr;}
    .faq-item summary{font-size:15.5px;}
  }