/* roulang page: index */
:root{
  --bg-900:#070B12;
  --bg-800:#0C1420;
  --bg-700:#121C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#12D3C6;
  --brand-dim:rgba(18,211,198,.12);
  --cta:#FF7A45;
  --violet:#7A6BFF;
  --text:#E8EEF6;
  --body:#B7C2D0;
  --muted:#8A97A8;
  --glass:rgba(255,255,255,.045);
  --radius-card:16px;
  --radius-btn:12px;
  --radius-img:14px;
  --radius-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.04);
  --shadow-hover:0 28px 60px -28px rgba(18,211,198,.28);
  --ease:220ms cubic-bezier(.22,.61,.36,1);
  --space-section:88px;
  --fs-h1:clamp(30px,4.6vw,52px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:21px;
  --fs-body:16px;
  --lh-body:1.85;
  --fs-meta:13px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--body);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  -webkit-font-smoothing:antialiased;
  padding-bottom:0;
}
body::before{
  content:"";
  position:fixed;
  inset:0 0 auto 0;
  height:320px;
  background:radial-gradient(60% 100% at 50% 0%, rgba(18,211,198,.18), rgba(18,211,198,0) 70%);
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--brand);text-decoration:none;transition:color var(--ease)}
a:hover{color:#6FF3E9}
button,input{font-family:inherit}
h1,h2,h3,h4{margin:0;color:var(--text);font-weight:700;line-height:1.3;letter-spacing:.01em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}

.shell{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.section{padding:var(--space-section) 0;position:relative}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:18px;margin-bottom:32px}
.section-title{font-size:var(--fs-h2)}
.section-sub{margin-top:10px;color:var(--muted);font-size:15px;max-width:680px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;color:var(--brand);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);opacity:.7}
.divider{height:1px;background:var(--line);border:0;margin:0}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.04em}

/* 顶条 */
.topbar{background:rgba(7,11,18,.9);border-bottom:1px solid var(--line);font-size:12px;color:var(--muted);position:relative;z-index:1001}
.topbar .shell{display:flex;align-items:center;justify-content:space-between;height:32px;gap:16px}
.topbar-links{display:flex;gap:18px}
.topbar a{color:var(--muted);font-size:12px}
.topbar a:hover{color:var(--brand)}
.topbar-note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* 站点头 */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(7,11,18,.86);border-bottom:1px solid var(--line);backdrop-filter:blur(14px) saturate(120%)}
.brand-row{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:16px 0}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:40px;height:40px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(150deg,#12D3C6,#0b7d78);color:#04121a;font-weight:800;font-size:19px;box-shadow:0 10px 26px -12px rgba(18,211,198,.7)}
.brand-name{font-size:19px;font-weight:700;color:var(--text);letter-spacing:.02em}
.brand-tag{display:block;font-size:12px;color:var(--muted);font-weight:400;letter-spacing:.06em}
.brand-actions{display:flex;align-items:center;gap:12px}
.icon-btn{width:38px;height:38px;border-radius:50%;border:1px solid var(--line-strong);background:transparent;color:var(--muted);display:grid;place-items:center;cursor:pointer;transition:all var(--ease)}
.icon-btn:hover{color:var(--brand);border-color:rgba(18,211,198,.5);background:var(--brand-dim)}
.hamburger{display:none}
.channel-row{border-top:1px solid var(--line)}
.channel-list{display:flex;gap:26px;overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
.channel-list::-webkit-scrollbar{display:none}
.channel-link{position:relative;display:block;padding:14px 0;color:var(--muted);font-size:15px;white-space:nowrap;transition:color var(--ease)}
.channel-link::after{content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--brand);transform:scaleX(0);transform-origin:left;transition:transform var(--ease)}
.channel-link:hover{color:var(--text)}
.channel-link:hover::after{transform:scaleX(1)}
.channel-link.active{color:var(--text);font-weight:600}
.channel-link.active::after{transform:scaleX(1)}

/* 按钮 */
.btn-cta,.btn-ghost,.btn-line,.btn-cta-sm{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-btn);font-weight:600;cursor:pointer;transition:all var(--ease);border:1px solid transparent;text-align:center}
.btn-cta{padding:14px 26px;font-size:16px;color:#200D04;background:linear-gradient(180deg,#FF8E5C,#FF6A32);box-shadow:0 10px 30px -8px rgba(255,122,69,.55),0 0 0 1px rgba(255,122,69,.45)}
.btn-cta:hover{color:#200D04;filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 16px 40px -10px rgba(255,122,69,.62),0 0 0 1px rgba(255,122,69,.55)}
.btn-cta:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,122,69,.45)}
.btn-cta-sm{padding:10px 18px;font-size:14px;color:#200D04;background:linear-gradient(180deg,#FF8E5C,#FF6A32);box-shadow:0 8px 22px -10px rgba(255,122,69,.6)}
.btn-cta-sm:hover{color:#200D04;filter:brightness(1.08);transform:translateY(-1px)}
.btn-ghost{padding:14px 24px;font-size:16px;color:var(--text);background:transparent;border-color:var(--line-strong)}
.btn-ghost:hover{color:var(--brand);border-color:rgba(18,211,198,.5);background:var(--brand-dim)}
.btn-ghost:active{transform:translateY(1px)}
.btn-line{padding:10px 18px;font-size:14px;color:var(--body);border-color:var(--line-strong)}
.btn-line:hover{color:var(--brand);border-color:rgba(18,211,198,.5);background:var(--brand-dim)}

/* 玻璃卡 */
.glass{background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);backdrop-filter:blur(14px) saturate(120%);box-shadow:var(--shadow-card)}

/* HERO */
.hero{padding:76px 0 var(--space-section);position:relative}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:44px;align-items:center}
.hero h1{font-size:var(--fs-h1);line-height:1.15;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-sub{font-size:18px;color:var(--body);margin-bottom:28px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:30px}
.hero-stats{display:flex;flex-wrap:wrap;gap:26px;padding-top:22px;border-top:1px dashed var(--line-strong)}
.hero-stat{min-width:120px}
.hero-stat dt{font-size:12px;color:var(--muted);letter-spacing:.08em;margin-bottom:6px}
.hero-stat dd{margin:0;font-size:18px;font-weight:700;color:var(--text)}
.hero-note{margin-top:16px;font-size:12px;color:var(--muted)}
.hero-visual{position:relative}
.preview-frame{padding:16px;border-radius:20px;overflow:hidden;position:relative}
.preview-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(7,11,18,0) 45%,rgba(7,11,18,.72));pointer-events:none;border-radius:20px}
.preview-frame img{border-radius:var(--radius-img);width:100%;aspect-ratio:4/3;object-fit:cover}
.soft-bar{position:absolute;left:22px;right:22px;bottom:22px;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 16px;border-radius:var(--radius-pill);background:rgba(12,20,32,.86);border:1px solid var(--line-strong);backdrop-filter:blur(10px);z-index:2}
.soft-bar span{font-size:13px;color:var(--body)}
.soft-bar strong{color:var(--text);font-size:14px}

/* 价值条 */
.value-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.value-item{display:flex;gap:18px;padding:22px;border-radius:var(--radius-card);background:var(--glass);border:1px solid var(--line);transition:all var(--ease);box-shadow:var(--shadow-card)}
.value-item:hover{transform:translateY(-3px);border-color:rgba(18,211,198,.4);box-shadow:var(--shadow-hover)}
.value-icon{flex:0 0 46px;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--brand-dim);color:var(--brand);font-size:18px;border:1px solid rgba(18,211,198,.25)}
.value-body h3{font-size:17px;margin-bottom:8px}
.value-body p{font-size:14px;color:var(--muted);line-height:1.75}

/* 轮播 */
.shot-carousel{position:relative}
.shot-card{padding:0;overflow:hidden;border-radius:var(--radius-card);background:var(--glass);border:1px solid var(--line);transition:all var(--ease);height:100%}
.shot-card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:0}
.shot-body{padding:18px}
.shot-body h3{font-size:16px;margin-bottom:8px}
.shot-body p{font-size:13px;color:var(--muted);line-height:1.7}
.carousel-item .shot-card{opacity:.55}
.carousel-item.active .shot-card{opacity:1}
.carousel-indicators{position:static;margin:26px 0 0;gap:10px}
.carousel-indicators [data-bs-target]{width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.22);border:0;margin:0;opacity:1;transition:all var(--ease)}
.carousel-indicators .active{background:var(--brand);width:22px;border-radius:var(--radius-pill)}
.shot-nav{position:absolute;top:38%;width:44px;height:44px;border-radius:50%;background:rgba(12,20,32,.8);border:1px solid var(--line-strong);color:var(--text);display:grid;place-items:center;transition:all var(--ease)}
.shot-nav:hover{background:var(--brand-dim);border-color:rgba(18,211,198,.5);color:var(--brand)}
.carousel-control-prev.shot-nav{left:-22px}
.carousel-control-next.shot-nav{right:-22px}

/* 系统要求 */
.spec-card{border-radius:var(--radius-card);background:var(--glass);border:1px solid var(--line);overflow:hidden;transition:all var(--ease)}
.spec-card:hover{border-color:rgba(18,211,198,.4);box-shadow:var(--shadow-hover);transform:translateY(-3px)}
.spec-top{height:4px}
.spec-top.c1{background:var(--brand)}
.spec-top.c2{background:var(--cta)}
.spec-top.c3{background:var(--violet)}
.spec-inner{padding:22px}
.spec-inner h3{font-size:18px;margin-bottom:4px}
.spec-inner .spec-os{font-size:13px;color:var(--muted);margin-bottom:16px}
.kv{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border-bottom:0}
.kv dt{color:var(--muted);font-weight:400}
.kv dd{margin:0;color:var(--text);text-align:right}

/* 评价墙 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;align-items:start}
.review-card{padding:22px;border-radius:var(--radius-card);background:var(--glass);border:1px solid var(--line);transition:all var(--ease)}
.review-card:hover{transform:translateY(-3px);border-color:rgba(122,107,255,.45);box-shadow:var(--shadow-hover)}
.review-card.tall{margin-top:26px}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:700;color:#04121a;background:linear-gradient(150deg,#12D3C6,#7A6BFF);font-size:16px}
.review-name{font-size:15px;color:var(--text);font-weight:600}
.review-meta{font-size:12px;color:var(--muted)}
.stars{display:flex;gap:3px;margin-bottom:12px}
.stars i{font-size:12px;color:var(--cta)}
.stars i.off{color:rgba(255,255,255,.18)}
.review-text{font-size:14px;color:var(--body);line-height:1.8}
.review-tag{display:inline-block;margin-top:14px;padding:4px 12px;font-size:12px;border-radius:var(--radius-pill);color:var(--brand);border:1px solid rgba(18,211,198,.3);background:var(--brand-dim)}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{border-radius:var(--radius-card);overflow:hidden;background:var(--glass);border:1px solid var(--line);transition:all var(--ease);display:flex;flex-direction:column;height:100%}
.news-card:hover{transform:translateY(-3px);border-color:rgba(18,211,198,.4);box-shadow:var(--shadow-hover)}
.news-thumb{position:relative;overflow:hidden;aspect-ratio:16/9}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.22,.61,.36,1)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-badge{position:absolute;top:12px;left:12px;padding:4px 12px;font-size:12px;border-radius:var(--radius-pill);background:linear-gradient(120deg,rgba(122,107,255,.9),rgba(18,211,198,.9));color:#04121a;font-weight:600}
.news-body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1}
.news-body h3{font-size:17px;line-height:1.55;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-body h3 a{color:var(--text)}
.news-body h3 a:hover{color:var(--brand)}
.news-summary{font-size:14px;color:var(--muted);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:18px}
.news-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}
.news-foot a{font-size:13px;color:var(--brand)}
.empty-state{padding:56px 24px;text-align:center;border-radius:var(--radius-card);background:var(--glass);border:1px solid var(--line)}
.empty-state i{font-size:28px;color:var(--brand);margin-bottom:14px;display:block}
.empty-state p{color:var(--muted);margin-bottom:20px}

/* 下载收口 */
.download-band{padding:44px;border-radius:24px;background:var(--glass);border:1px solid var(--line);backdrop-filter:blur(14px) saturate(120%);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px;position:relative;overflow:hidden}
.download-band::before{content:"";position:absolute;inset:0;background:radial-gradient(70% 130% at 12% 0%, rgba(18,211,198,.16), transparent 65%);pointer-events:none}
.download-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:10px}
.download-band p{color:var(--muted);font-size:14px;max-width:560px}
.download-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}
.band-note{margin-top:16px;font-size:12px;color:var(--muted);letter-spacing:.02em}

/* FAQ */
.faq-wrap{max-width:900px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius-card);background:var(--glass);margin-bottom:14px;overflow:hidden;transition:border-color var(--ease)}
.faq-item:hover{border-color:rgba(18,211,198,.35)}
.faq-q{width:100%;text-align:left;background:transparent;border:0;color:var(--text);font-size:16px;font-weight:600;padding:18px 22px 18px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer;position:relative;transition:color var(--ease)}
.faq-q::before{content:"";position:absolute;left:0;top:14px;bottom:14px;width:2px;background:var(--brand);transition:background var(--ease)}
.faq-item:hover .faq-q::before{background:var(--cta)}
.faq-sign{font-size:20px;color:var(--brand);line-height:1;flex:0 0 auto}
.faq-a{max-height:0;overflow:hidden;transition:max-height 320ms cubic-bezier(.22,.61,.36,1)}
.faq-a-inner{padding:0 24px 20px;font-size:14px;color:var(--muted);line-height:1.85}
.faq-item.open .faq-a{max-height:320px}

/* CTA 带 */
.cta-band{padding:52px 40px;border-radius:24px;text-align:center;background:linear-gradient(180deg,rgba(18,211,198,.12),rgba(255,255,255,.03));border:1px solid rgba(18,211,198,.28);backdrop-filter:blur(14px)}
.cta-band h2{font-size:clamp(22px,3vw,32px);margin-bottom:14px}
.cta-band p{color:var(--body);max-width:640px;margin:0 auto 26px;font-size:15px}

/* 页脚 */
.site-footer{margin-top:var(--space-section);background:var(--bg-900);border-top:1px solid var(--line);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.footer-about{font-size:14px;color:var(--muted);line-height:1.8;max-width:300px;margin-bottom:18px}
.footer-contact{font-size:13px;color:var(--muted);line-height:2}
.footer-contact a{color:var(--body)}
.footer-contact a:hover{color:var(--brand)}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text)}
.footer-col li{margin-bottom:11px}
.footer-col a{font-size:14px;color:var(--muted)}
.footer-col a:hover{color:var(--brand)}
.footer-bottom{margin-top:48px;padding:22px 0 30px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;font-size:13px;color:var(--muted)}
.footer-bottom a{color:var(--muted)}
.footer-bottom a:hover{color:var(--brand)}

/* 移动端抽屉 */
.drawer{position:fixed;top:0;right:0;bottom:0;width:84%;max-width:340px;background:rgba(12,20,32,.97);border-left:1px solid var(--line);backdrop-filter:blur(16px);transform:translateX(102%);transition:transform 300ms cubic-bezier(.22,.61,.36,1);z-index:1100;padding:24px;overflow-y:auto}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px}
.drawer-links a{display:block;padding:14px 0;border-bottom:1px solid var(--line);color:var(--body);font-size:16px}
.drawer-links a.active{color:var(--brand)}
.drawer .btn-cta{width:100%;margin-top:24px}
.mask{position:fixed;inset:0;background:rgba(4,7,12,.66);opacity:0;visibility:hidden;transition:opacity var(--ease);z-index:1050}
.mask.show{opacity:1;visibility:visible}

/* 移动吸底 */
.mobile-bar{position:fixed;left:0;right:0;bottom:0;height:72px;display:none;align-items:center;gap:12px;padding:0 16px;background:rgba(7,11,18,.95);border-top:1px solid var(--line);backdrop-filter:blur(12px);z-index:900}
.mobile-bar .btn-cta{flex:1;padding:12px 16px;font-size:15px}
.mobile-bar .btn-ghost{flex:0 0 40%;padding:12px 16px;font-size:15px}

@media (max-width:1199.98px){
  .carousel-control-prev.shot-nav{left:-8px}
  .carousel-control-next.shot-nav{right:-8px}
}
@media (max-width:991.98px){
  :root{--space-section:64px;--fs-h3:20px}
  .hero{padding-top:54px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .review-card.tall{margin-top:0}
  .news-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
  .download-band{padding:34px}
}
@media (max-width:767.98px){
  :root{--space-section:48px;--lh-body:1.8;--fs-meta:12px}
  .shell{padding:0 18px}
  .glass,.preview-frame,.download-band,.cta-band,.mobile-bar,.site-header{backdrop-filter:none}
  .glass{background:rgba(255,255,255,.05)}
  .value-grid{grid-template-columns:1fr}
  .review-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .hamburger{display:grid}
  .brand-tag{display:none}
  .topbar-note{display:none}
  .hero-stats{gap:20px}
  .hero-stat{min-width:calc(50% - 10px)}
  .mobile-bar{display:flex}
  body{padding-bottom:72px}
  .site-footer{margin-top:var(--space-section);padding-bottom:12px}
  .section-head{margin-bottom:24px}
  .download-band{padding:26px 20px;flex-direction:column;align-items:flex-start}
  .download-actions{width:100%}
  .download-actions .btn-cta,.download-actions .btn-ghost{flex:1 1 46%}
  .cta-band{padding:32px 20px}
}
@media (max-width:575.98px){
  :root{--fs-body:15px}
  .brand-name{font-size:17px}
  .hero-sub{font-size:16px}
  .hero-actions .btn-cta,.hero-actions .btn-ghost{width:100%}
  .kv{flex-direction:column;gap:4px}
  .kv dd{text-align:left;color:var(--text)}
  .footer-grid{grid-template-columns:1fr}
  .channel-list{gap:20px}
  .soft-bar{left:14px;right:14px;bottom:14px;padding:10px 14px}
  .mobile-bar .btn-ghost{flex:0 0 42%}
}

/* roulang page: article */
:root{
  --bg-900:#070B12;
  --bg-800:#0C1420;
  --bg-700:#121C2B;
  --brand:#12D3C6;
  --brand-dim:rgba(18,211,198,.14);
  --cta:#FF7A45;
  --violet:#7A6BFF;
  --t-1:#E8EEF6;
  --t-2:#B7C2D0;
  --t-3:#8A97A8;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --glass:rgba(255,255,255,.045);
  --r-card:16px;
  --r-btn:12px;
  --r-img:14px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.04);
  --shadow-hover:0 28px 60px -28px rgba(18,211,198,.28);
  --font-sans:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --fs-h1:clamp(28px,3.6vw,42px);
  --fs-h2:clamp(22px,2.6vw,30px);
  --fs-h3:20px;
  --fs-body:15.5px;
  --fs-meta:13px;
  --gap-section:88px;
  --trans:220ms cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--t-2);
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  top:0;left:0;right:0;
  height:320px;
  background:radial-gradient(58% 100% at 50% 0%, rgba(18,211,198,.18), transparent 72%);
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px, transparent 1px);
  background-size:26px 26px;
  opacity:.055;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color var(--trans);}
a:hover{color:#5ce6dc;}
h1,h2,h3,h4{color:var(--t-1);font-weight:700;letter-spacing:.01em;margin:0;}
p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
a:focus-visible,button:focus-visible,input:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;}
.shell{position:relative;max-width:1200px;margin:0 auto;padding:0 24px;z-index:1;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);
  font-size:14px;font-weight:600;line-height:1;
  padding:13px 22px;
  border:1px solid transparent;
  cursor:pointer;
  transition:transform var(--trans),box-shadow var(--trans),background-color var(--trans),border-color var(--trans),color var(--trans);
}
.btn-cta{
  background:linear-gradient(180deg,#FF8E5C,#FF6A32);
  color:#1A0D05;
  box-shadow:0 10px 30px -8px rgba(255,122,69,.55), 0 0 0 1px rgba(255,122,69,.45);
}
.btn-cta:hover{filter:brightness(1.08);transform:translateY(-2px);color:#1A0D05;box-shadow:0 16px 38px -10px rgba(255,122,69,.65), 0 0 0 1px rgba(255,122,69,.55);}
.btn-cta:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  background:transparent;
  border-color:rgba(255,255,255,.18);
  color:var(--t-1);
}
.btn-ghost:hover{border-color:rgba(18,211,198,.6);background:rgba(18,211,198,.08);color:var(--t-1);transform:translateY(-2px);}
.btn-ghost:active{transform:translateY(1px);}
.btn-sm{padding:10px 16px;font-size:13px;}
.btn-block{width:100%;}
/* Header */
.site-header{position:sticky;top:0;z-index:1000;transition:background-color var(--trans),border-color var(--trans),backdrop-filter var(--trans);border-bottom:1px solid transparent;}
.site-header.scrolled{background:rgba(7,11,18,.88);backdrop-filter:blur(14px) saturate(120%);border-bottom-color:var(--line);}
.topbar{background:rgba(255,255,255,.03);border-bottom:1px solid var(--line);}
.topbar-inner{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  height:32px;font-size:12px;color:var(--t-3);
}
.topbar-note{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.topbar-link{font-size:12px;color:var(--t-3);}
.topbar-link:hover{color:var(--brand);}
.brand-row{padding:14px 0;}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;}
.brand{display:flex;align-items:center;gap:12px;color:inherit;}
.brand:hover{color:inherit;}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;
  display:grid;place-items:center;
  border-radius:13px;
  background:linear-gradient(150deg,rgba(18,211,198,.9),rgba(122,107,255,.85));
  color:#05100F;font-weight:800;font-size:19px;
  box-shadow:0 12px 26px -14px rgba(18,211,198,.8);
}
.brand-text{display:flex;flex-direction:column;line-height:1.25;}
.brand-name{font-size:17px;font-weight:800;color:var(--t-1);letter-spacing:.01em;}
.brand-sub{font-size:11.5px;color:var(--t-3);letter-spacing:.16em;}
.brand-actions{display:flex;align-items:center;gap:10px;}
.icon-btn{
  width:38px;height:38px;border-radius:11px;
  border:1px solid var(--line);
  background:var(--glass);color:var(--t-2);
  display:grid;place-items:center;cursor:pointer;
  transition:all var(--trans);
}
.icon-btn:hover{border-color:rgba(18,211,198,.5);color:var(--brand);}
.text-btn{font-size:13.5px;color:var(--t-2);padding:8px 10px;border-radius:10px;}
.text-btn:hover{color:var(--brand);background:rgba(18,211,198,.07);}
.menu-btn{display:none;width:40px;height:40px;border-radius:11px;border:1px solid var(--line);background:var(--glass);color:var(--t-1);cursor:pointer;}
/* Channel row */
.channel-row{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.02);}
.channel-list{
  max-width:1200px;margin:0 auto;padding:0 24px;
  display:flex;gap:28px;
  overflow-x:auto;scrollbar-width:none;
}
.channel-list::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;
  padding:13px 2px 12px;
  font-size:14px;color:var(--t-3);white-space:nowrap;
  transition:color var(--trans);
}
.channel-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:var(--brand);border-radius:2px;
  transform:scaleX(0);transform-origin:center;
  transition:transform var(--trans);
}
.channel-link:hover{color:var(--t-1);}
.channel-link:hover::after{transform:scaleX(1);}
.channel-link.active{color:var(--t-1);font-weight:600;}
.channel-link.active::after{transform:scaleX(1);}
/* Mobile drawer */
.mobile-drawer{
  position:fixed;top:0;right:0;bottom:0;width:min(320px,86vw);
  background:rgba(9,14,22,.97);
  backdrop-filter:blur(16px);
  border-left:1px solid var(--line);
  z-index:1100;
  transform:translateX(100%);
  transition:transform 260ms cubic-bezier(.22,.61,.36,1);
  padding:20px;display:flex;flex-direction:column;gap:18px;
}
.mobile-drawer.open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{background:none;border:none;color:var(--t-2);font-size:26px;line-height:1;cursor:pointer;}
.drawer-nav{display:flex;flex-direction:column;gap:2px;}
.drawer-nav a{padding:12px 10px;border-radius:10px;color:var(--t-2);font-size:15px;}
.drawer-nav a:hover,.drawer-nav a.active{background:rgba(18,211,198,.08);color:var(--brand);}
/* Breadcrumb */
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;color:var(--t-3);padding-top:26px;}
.crumbs a{color:var(--t-3);}
.crumbs a:hover{color:var(--brand);}
.crumbs .sep{opacity:.5;}
.crumbs .current{color:var(--brand);}
/* Article hero */
.article-hero{
  position:relative;
  margin-top:18px;
  border-radius:20px;
  overflow:hidden;
  border:1px solid var(--line);
  background-image:linear-gradient(180deg,rgba(7,11,18,.62),rgba(7,11,18,.96)),url('/assets/images/backpic/back-2.webp');
  background-size:cover;
  background-position:center;
  padding:44px 40px 38px;
}
.article-hero::before{
  content:"";position:absolute;left:0;top:0;width:48px;height:48px;
  border-left:2px solid rgba(18,211,198,.5);border-top:2px solid rgba(18,211,198,.5);
  border-top-left-radius:20px;
}
.article-hero h1{
  font-size:var(--fs-h1);line-height:1.24;
  max-width:20em;margin-bottom:18px;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px;font-size:var(--fs-meta);color:var(--t-3);}
.cat-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 13px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;
  color:#EAF6FF;
  background:linear-gradient(120deg,rgba(122,107,255,.35),rgba(18,211,198,.28));
  border:1px solid rgba(122,107,255,.45);
}
.meta-dot{width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.25);}
.meta-row time{font-family:var(--font-mono);letter-spacing:.04em;}
.hero-divider{height:1px;background:var(--line);margin:28px 0 44px;}
/* Layout */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start;}
.article-main{max-width:820px;min-width:0;}
.article-body{font-size:16px;line-height:1.9;color:var(--t-2);}
.article-body h2{
  font-size:var(--fs-h2);
  margin:46px 0 16px;padding-left:14px;
  border-left:3px solid var(--brand);
  line-height:1.35;
}
.article-body h3{font-size:19px;margin:32px 0 12px;}
.article-body h4{font-size:16px;color:var(--t-1);margin:24px 0 10px;}
.article-body p{margin:0 0 18px;}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(18,211,198,.35);}
.article-body ul{list-style:none;margin:0 0 18px;}
.article-body ol{list-style:decimal;margin:0 0 18px;padding-left:22px;}
.article-body ul li{position:relative;padding-left:20px;margin:8px 0;}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:11px;
  width:6px;height:6px;border-radius:50%;background:var(--brand);
}
.article-body ol li{margin:8px 0;}
.article-body img{border-radius:var(--r-img);border:1px solid var(--line);margin:10px 0 22px;width:100%;}
.article-body blockquote{
  margin:24px 0;padding:16px 20px;
  border-left:3px solid var(--violet);
  background:rgba(122,107,255,.07);
  border-radius:0 12px 12px 0;
  color:var(--t-2);
}
.article-body strong{color:var(--t-1);}
.article-body table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:14px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article-body th{background:rgba(255,255,255,.04);color:var(--t-1);font-weight:600;}
.article-body hr{border:none;height:1px;background:var(--line);margin:34px 0;}
/* Empty state */
.empty-state{
  text-align:center;
  padding:56px 28px;
  border-radius:var(--r-card);
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.empty-icon{
  width:58px;height:58px;margin:0 auto 18px;border-radius:16px;
  display:grid;place-items:center;font-size:24px;
  background:rgba(18,211,198,.1);color:var(--brand);border:1px solid rgba(18,211,198,.3);
}
.empty-state h2{font-size:20px;margin-bottom:10px;}
.empty-state p{color:var(--t-3);margin-bottom:22px;}
/* Tags */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin:44px 0 0;padding-top:26px;border-top:1px solid var(--line);}
.tag{
  padding:6px 14px;border-radius:var(--r-pill);
  font-size:12.5px;color:var(--t-2);
  background:var(--glass);border:1px solid var(--line);
  transition:all var(--trans);
}
.tag:hover{border-color:rgba(122,107,255,.6);color:var(--t-1);}
/* Prev / next */
.pager{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:44px;}
.pager-card{
  display:block;padding:20px;
  border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:all var(--trans);
}
.pager-card:hover{transform:translateY(-3px);border-color:rgba(18,211,198,.4);box-shadow:var(--shadow-hover);}
.pager-label{display:block;font-size:12px;color:var(--t-3);letter-spacing:.1em;margin-bottom:8px;}
.pager-title{display:block;color:var(--t-1);font-size:15px;font-weight:600;line-height:1.6;}
.pager-card.next{text-align:right;}
/* Related */
.section-block{margin-top:72px;}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:26px;}
.section-head h2{font-size:var(--fs-h2);line-height:1.3;}
.section-head .more-link{font-size:13.5px;color:var(--t-3);}
.section-head .more-link:hover{color:var(--brand);}
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;}
.news-card{
  display:flex;flex-direction:column;
  border-radius:var(--r-card);
  overflow:hidden;
  background:var(--glass);
  border:1px solid var(--line);
  box-shadow:var(--shadow-card);
  transition:all var(--trans);
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(18,211,198,.4);box-shadow:var(--shadow-hover);}
.news-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-700);}
.news-thumb img{width:100%;height:100%;object-fit:cover;transition:transform 420ms cubic-bezier(.22,.61,.36,1);}
.news-card:hover .news-thumb img{transform:scale(1.04);}
.news-badge{
  position:absolute;top:12px;left:12px;
  padding:4px 11px;border-radius:var(--r-pill);
  font-size:11.5px;font-weight:600;color:#EAF6FF;
  background:linear-gradient(120deg,rgba(122,107,255,.85),rgba(18,211,198,.7));
  backdrop-filter:blur(6px);
}
.news-body{padding:18px 18px 20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.news-title{font-size:16px;color:var(--t-1);font-weight:600;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-excerpt{font-size:13.5px;color:var(--t-3);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:12px;border-top:1px solid var(--line);font-size:12.5px;color:var(--t-3);font-family:var(--font-mono);}
.news-foot .read{font-family:var(--font-sans);color:var(--brand);}
/* Sidebar */
.article-side{position:sticky;top:132px;display:flex;flex-direction:column;gap:20px;}
.side-card{
  padding:20px;border-radius:var(--r-card);
  background:var(--glass);border:1px solid var(--line);
  box-shadow:var(--shadow-card);
}
.side-card h3{font-size:15px;margin-bottom:14px;padding-left:10px;border-left:2px solid var(--brand);line-height:1.2;}
.toc-list{display:flex;flex-direction:column;gap:2px;}
.toc-list li a{display:block;padding:7px 10px;border-radius:9px;font-size:13.5px;color:var(--t-3);line-height:1.6;}
.toc-list li a:hover{background:rgba(18,211,198,.08);color:var(--brand);}
.hot-list{display:flex;flex-direction:column;}
.hot-list li{padding:11px 0;border-bottom:1px dashed var(--line);}
.hot-list li:last-child{border-bottom:none;padding-bottom:0;}
.hot-list a{display:block;font-size:13.5px;color:var(--t-2);line-height:1.62;}
.hot-list a:hover{color:var(--brand);}
.hot-list span{display:block;font-size:11.5px;color:var(--t-3);font-family:var(--font-mono);margin-top:4px;letter-spacing:.05em;}
.side-download{background:linear-gradient(160deg,rgba(18,211,198,.12),rgba(255,255,255,.03));border-color:rgba(18,211,198,.28);}
.side-download p{font-size:13px;color:var(--t-2);margin:8px 0 16px;line-height:1.7;}
.side-download .btn+.btn{margin-top:10px;}
/* return */
.back-strip{
  margin-top:40px;padding:22px 26px;border-radius:var(--r-card);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  background:var(--glass);border:1px solid var(--line);
}
.back-strip p{font-size:13.5px;color:var(--t-3);}
.back-links{display:flex;flex-wrap:wrap;gap:14px;font-size:13.5px;}
/* FAQ */
.faq-wrap{margin-top:72px;}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;
  padding:20px 0 20px 16px;
  position:relative;cursor:pointer;
  color:var(--t-1);font-size:16px;font-weight:600;line-height:1.6;
  transition:color var(--trans);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:20px;bottom:20px;width:2px;
  background:var(--brand);border-radius:2px;transition:background-color var(--trans);
}
.faq-q .sign{float:right;color:var(--brand);font-family:var(--font-mono);font-size:18px;line-height:1;margin-left:14px;}
.faq-q:hover{color:var(--brand);}
.faq-q:hover::before{background:var(--cta);}
.faq-a{padding:0 0 22px 16px;font-size:14.5px;color:var(--t-3);line-height:1.85;display:none;}
.faq-item.open .faq-a{display:block;}
/* CTA band */
.cta-band{
  margin:72px 0 0;
  padding:40px 38px;
  border-radius:20px;
  background:linear-gradient(120deg,rgba(18,211,198,.14),rgba(255,255,255,.03) 60%);
  border:1px solid rgba(18,211,198,.28);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px;
}
.cta-band h2{font-size:clamp(20px,2.2vw,26px);margin-bottom:10px;}
.cta-band p{font-size:14px;color:var(--t-2);max-width:56ch;}
/* Footer */
.site-footer{margin-top:96px;border-top:1px solid var(--line);background:var(--bg-900);position:relative;z-index:1;}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;
  padding:56px 0 34px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;border-radius:11px;font-size:16px;}
.footer-about{font-size:13.5px;color:var(--t-3);line-height:1.85;max-width:34ch;}
.footer-contact{margin-top:16px;font-size:13px;color:var(--t-3);line-height:2;}
.footer-contact a{color:var(--t-2);}
.footer-contact a:hover{color:var(--brand);}
.footer-col h4{font-size:14.5px;margin-bottom:16px;color:var(--t-1);}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col ul a{font-size:13.5px;color:var(--t-3);}
.footer-col ul a:hover{color:var(--brand);}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:18px 0 26px;border-top:1px solid var(--line);
  font-size:12.5px;color:var(--t-3);
}
.footer-bottom a{color:var(--t-3);}
.footer-bottom a:hover{color:var(--brand);}
@media (max-width:1199.98px){
  .article-layout{grid-template-columns:minmax(0,1fr) 300px;gap:36px;}
}
@media (max-width:991.98px){
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0;}
  .article-main{max-width:none;}
  .article-side{position:static;margin-top:48px;flex-direction:row;flex-wrap:wrap;}
  .article-side .side-card{flex:1 1 260px;}
  .news-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
}
@media (max-width:767.98px){
  :root{--gap-section:64px;}
  .shell{padding:0 20px;}
  .channel-list{padding:0 20px;gap:22px;}
  .site-header.scrolled{background:rgba(7,11,18,.97);}
  .site-header.scrolled,.mobile-drawer{backdrop-filter:none;}
  .article-hero{padding:32px 22px 28px;}
  .brand-sub{display:none;}
  .text-btn{display:none;}
  .menu-btn{display:grid;place-items:center;}
  .article-side{flex-direction:column;}
  .article-side .side-card{flex:auto;}
  .hero-divider{margin:22px 0 32px;}
  .cta-band{padding:30px 22px;}
  .pager{grid-template-columns:1fr;}
  .pager-card.next{text-align:left;}
}
@media (max-width:575.98px){
  .topbar-note{display:none;}
  .topbar-inner{justify-content:flex-end;}
  .news-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
  .brand-actions .btn-cta{display:none;}
  .article-hero h1{font-size:26px;}
  .tag-row{gap:8px;}
  .cta-band .btn{width:100%;}
}

/* roulang page: category1 */
:root{
  --bg-900:#070B12;
  --bg-800:#0C1420;
  --bg-700:#121C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.18);
  --brand:#12D3C6;
  --brand-soft:rgba(18,211,198,.08);
  --brand-line:rgba(18,211,198,.4);
  --cta:#FF7A45;
  --violet:#7A6BFF;
  --t-strong:#E8EEF6;
  --t-body:#B7C2D0;
  --t-mute:#8A97A8;
  --danger:#FF6B6B;
  --glass:rgba(255,255,255,.045);
  --r-card:16px;
  --r-btn:12px;
  --r-img:14px;
  --r-pill:999px;
  --r-input:10px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.04);
  --sh-hover:0 28px 60px -28px rgba(18,211,198,.28);
  --sh-cta:0 10px 30px -8px rgba(255,122,69,.55), 0 0 0 1px rgba(255,122,69,.45);
  --sp-sec:88px;
  --font:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--t-body);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  position:relative;
  overflow-x:hidden;
}
body::before{
  content:"";
  position:absolute;
  top:0;left:0;right:0;
  height:320px;
  background:radial-gradient(60% 100% at 50% 0%, rgba(18,211,198,.18), rgba(18,211,198,0) 70%);
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.5) 1px, transparent 1px);
  background-size:22px 22px;
  opacity:.06;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s ease,opacity .2s ease}
a:hover{color:#5CE7DC}
h1,h2,h3,h4{color:var(--t-strong);margin:0;font-weight:700;letter-spacing:.01em}
h1{font-size:clamp(30px,4.6vw,52px);line-height:1.15}
h2{font-size:clamp(24px,3vw,36px);line-height:1.3}
h3{font-size:21px;line-height:1.4}
p{margin:0 0 14px}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:6px}
.shell{max-width:1200px;margin:0 auto;padding:0 24px;position:relative;z-index:1}
.sect{padding:var(--sp-sec) 0;position:relative}
.sect-tight{padding:56px 0}
.sect-head{max-width:760px;margin-bottom:34px}
.sect-head .eyebrow{
  display:inline-block;font-size:12px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand);border:1px solid var(--brand-line);border-radius:var(--r-pill);
  padding:4px 12px;margin-bottom:14px;background:var(--brand-soft);
}
.sect-head p{color:var(--t-mute);font-size:15px;margin:12px 0 0}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ============ header ============ */
.site-header{position:sticky;top:0;z-index:1000;transition:background .25s ease,box-shadow .25s ease}
.site-header::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:rgba(7,11,18,.82);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease;
}
.site-header.is-stuck::after{border-bottom-color:var(--line)}
.topbar{border-bottom:1px solid var(--line);font-size:12px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:32px;gap:16px}
.topbar-note{color:var(--t-mute);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.topbar-links{display:flex;gap:18px;white-space:nowrap}
.topbar-links a{color:var(--t-mute)}
.topbar-links a:hover{color:var(--brand)}
.brand-row{padding:14px 0}
.brand-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand-logo{display:flex;align-items:center;gap:12px;color:var(--t-strong)}
.brand-logo:hover{color:var(--t-strong)}
.brand-mark{
  width:40px;height:40px;border-radius:12px;flex:0 0 40px;
  display:grid;place-items:center;
  background:linear-gradient(160deg,rgba(18,211,198,.22),rgba(122,107,255,.18));
  border:1px solid var(--brand-line);
  color:var(--brand);font-weight:700;font-size:19px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-name{font-size:18px;font-weight:700;letter-spacing:.02em}
.brand-sub{font-size:12px;color:var(--t-mute);letter-spacing:.08em}
.brand-actions{display:flex;align-items:center;gap:12px}
.icon-btn{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:var(--glass);border:1px solid var(--line);color:var(--t-body);cursor:pointer;
  transition:border-color .2s ease,color .2s ease,background .2s ease;
}
.icon-btn:hover{border-color:var(--brand-line);color:var(--brand);background:var(--brand-soft)}
.icon-btn svg{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:1.8}
.ghost-link{
  font-size:14px;color:var(--t-body);padding:9px 14px;border-radius:var(--r-btn);
  border:1px solid var(--line-strong);transition:all .2s ease;
}
.ghost-link:hover{border-color:var(--brand-line);color:var(--brand);background:var(--brand-soft)}
.btn-cta{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:var(--r-btn);border:0;cursor:pointer;
  font-size:15px;font-weight:700;color:#1A0C04;
  background:linear-gradient(180deg,#FF8E5C,#FF6A32);
  box-shadow:var(--sh-cta);
  transition:transform .2s cubic-bezier(.22,.61,.36,1),filter .2s ease,box-shadow .2s ease;
}
.btn-cta:hover{filter:brightness(1.08);transform:translateY(-2px);box-shadow:0 16px 38px -8px rgba(255,122,69,.62),0 0 0 1px rgba(255,122,69,.5);color:#1A0C04}
.btn-cta:active{transform:translateY(1px);box-shadow:none}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 20px;border-radius:var(--r-btn);cursor:pointer;font-size:15px;font-weight:600;
  color:var(--t-strong);background:transparent;border:1px solid var(--line-strong);
  transition:all .2s ease;
}
.btn-ghost:hover{border-color:var(--brand-line);background:var(--brand-soft);color:var(--brand)}
.btn-ghost:active{transform:translateY(1px)}
.btn-sm{padding:8px 16px;font-size:14px}
.menu-btn{
  display:none;width:38px;height:38px;border-radius:10px;background:var(--glass);
  border:1px solid var(--line);cursor:pointer;padding:0;place-items:center;
}
.menu-btn span{display:block;width:18px;height:2px;background:var(--t-strong);margin:3px auto;border-radius:2px;transition:.2s}
.search-panel{
  display:none;border-top:1px solid var(--line);padding:12px 0 16px;
}
.search-panel.open{display:block}
.search-form{display:flex;gap:10px}
.search-form input{
  flex:1;background:rgba(255,255,255,.04);border:1px solid var(--line);color:var(--t-strong);
  border-radius:var(--r-input);padding:11px 14px;font-size:14px;outline:none;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.search-form input::placeholder{color:var(--t-mute)}
.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(18,211,198,.18)}
.channel-row{border-top:1px solid var(--line);position:relative}
.channel-list{
  display:flex;gap:6px;overflow-x:auto;padding:0 24px;max-width:1200px;margin:0 auto;
  scrollbar-width:none;
}
.channel-list::-webkit-scrollbar{display:none}
.channel-link{
  display:inline-block;padding:14px 14px 12px;font-size:15px;color:var(--t-mute);
  border-bottom:2px solid transparent;white-space:nowrap;transition:color .2s ease,border-color .2s ease;
}
.channel-link:hover{color:var(--t-strong);border-bottom-color:var(--brand-line)}
.channel-link.active{color:var(--t-strong);font-weight:600;border-bottom-color:var(--brand)}
.mobile-drawer{
  display:none;position:fixed;top:0;right:0;bottom:0;width:min(86vw,340px);z-index:1100;
  background:rgba(12,20,32,.97);border-left:1px solid var(--line);
  padding:22px;flex-direction:column;gap:6px;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.22,.61,.36,1);
}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a.drawer-link{
  padding:13px 6px;border-bottom:1px solid var(--line);color:var(--t-body);font-size:15px;
}
.mobile-drawer a.drawer-link.active{color:var(--brand);font-weight:600}
.drawer-close{
  align-self:flex-end;background:var(--glass);border:1px solid var(--line);color:var(--t-body);
  border-radius:10px;width:36px;height:36px;cursor:pointer;font-size:16px;margin-bottom:8px;
}
.drawer-bottom{margin-top:auto;display:flex;flex-direction:column;gap:10px;padding-top:18px}

/* ============ hero ============ */
.hero{padding:64px 0 56px;position:relative}
.crumb{font-size:12px;color:var(--t-mute);margin-bottom:20px}
.crumb a{color:var(--t-mute)}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{margin:0 8px;opacity:.6}
.crumb span.current{color:var(--brand)}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:40px;align-items:center}
.hero-copy .hero-lead{color:var(--t-mute);font-size:16px;margin:18px 0 26px;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:26px}
.hero-facts{display:flex;flex-wrap:wrap;gap:22px;font-size:13px;color:var(--t-mute)}
.hero-facts .fact{border-left:1px dashed var(--line-strong);padding-left:14px}
.hero-facts .fact:first-child{border-left:0;padding-left:0}
.hero-facts strong{display:block;color:var(--t-strong);font-size:16px;font-weight:700;font-family:var(--mono)}
.hero-art{position:relative}
.hero-art .glass{
  border-radius:20px;border:1px solid var(--line);overflow:hidden;
  background:var(--glass);box-shadow:var(--sh-card);
  backdrop-filter:blur(14px) saturate(120%);
}
.hero-art img{width:100%;aspect-ratio:4/3;object-fit:cover}
.hero-art .art-bar{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 16px;border-top:1px solid var(--line);background:rgba(7,11,18,.5);
  font-size:13px;color:var(--t-mute);
}
.hero-art .art-bar strong{color:var(--t-strong);font-weight:600}
.hex-corner{
  position:absolute;top:-10px;right:-10px;width:46px;height:46px;pointer-events:none;
  border-top:1px solid var(--brand-line);border-right:1px solid var(--brand-line);border-radius:4px;
}

/* ============ 横向大卡列表 ============ */
.stack-list{display:flex;flex-direction:column;gap:28px}
.row-card{
  display:grid;grid-template-columns:5fr 7fr;gap:0;
  border-radius:var(--r-card);border:1px solid var(--line);
  background:var(--glass);box-shadow:var(--sh-card);overflow:hidden;
  backdrop-filter:blur(14px) saturate(120%);
  transition:transform .22s cubic-bezier(.22,.61,.36,1),box-shadow .22s ease,border-color .22s ease;
}
.row-card:hover{transform:translateY(-3px);border-color:var(--brand-line);box-shadow:var(--sh-hover)}
.row-media{position:relative;overflow:hidden;background:var(--bg-700);min-height:260px}
.row-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.row-card:hover .row-media img{transform:scale(1.04)}
.row-media .media-tag{
  position:absolute;top:14px;left:14px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;color:#06110F;
  background:linear-gradient(120deg,var(--brand),#77E9E0);
}
.row-body{padding:26px 28px;display:flex;flex-direction:column;gap:14px}
.row-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.badge-brand{
  font-size:12px;padding:4px 12px;border-radius:var(--r-pill);color:var(--brand);
  border:1px solid var(--brand-line);background:var(--brand-soft);
}
.badge-violet{
  font-size:12px;padding:4px 12px;border-radius:var(--r-pill);color:#C3BCFF;
  border:1px solid rgba(122,107,255,.4);
  background:linear-gradient(120deg,rgba(122,107,255,.18),rgba(18,211,198,.12));
}
.meta{font-size:13px;color:var(--t-mute);font-family:var(--mono)}
.row-body p{color:var(--t-body);font-size:15px;margin:0}
.spec-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 22px;margin:2px 0 0}
.spec-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:8px 0;border-bottom:1px solid var(--line);font-size:13.5px;
}
.spec-row dt{color:var(--t-mute);margin:0;font-weight:400}
.spec-row dd{margin:0;color:var(--t-strong);font-family:var(--mono);font-size:13px}
.row-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.note-line{font-size:12.5px;color:var(--t-mute);margin:12px 0 0}

/* ============ 步骤 ============ */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{
  padding:24px 22px;border-radius:var(--r-card);border:1px solid var(--line);
  background:var(--glass);box-shadow:var(--sh-card);position:relative;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.step:hover{transform:translateY(-3px);border-color:var(--brand-line);box-shadow:var(--sh-hover)}
.step .num{
  font-family:var(--mono);font-size:13px;letter-spacing:.14em;color:var(--brand);
  display:block;margin-bottom:12px;
}
.step h3{font-size:18px;margin-bottom:8px}
.step p{font-size:14px;color:var(--t-mute);margin:0}

/* ============ 设备要求 ============ */
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.req-card{
  border-radius:var(--r-card);border:1px solid var(--line);background:var(--glass);
  box-shadow:var(--sh-card);overflow:hidden;
  transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.req-card:hover{transform:translateY(-3px);border-color:var(--brand-line);box-shadow:var(--sh-hover)}
.req-card .bar{height:4px}
.req-card .bar.b1{background:linear-gradient(90deg,var(--brand),rgba(18,211,198,.2))}
.req-card .bar.b2{background:linear-gradient(90deg,var(--cta),rgba(255,122,69,.2))}
.req-card .bar.b3{background:linear-gradient(90deg,var(--violet),rgba(122,107,255,.2))}
.req-inner{padding:24px 22px}
.req-inner h3{font-size:19px;margin-bottom:4px}
.req-inner .sub{font-size:13px;color:var(--t-mute);margin-bottom:14px}
.kv{display:flex;justify-content:space-between;gap:14px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border-bottom:0}
.kv span{color:var(--t-mute)}
.kv strong{color:var(--t-strong);font-weight:600;font-family:var(--mono);font-size:13.5px;text-align:right}

/* ============ 玻璃横幅 ============ */
.glass-band{
  border-radius:20px;border:1px solid var(--line);overflow:hidden;position:relative;
  background:linear-gradient(120deg,rgba(18,211,198,.10),rgba(122,107,255,.08)),var(--glass);
  box-shadow:var(--sh-card);padding:38px 34px;display:flex;align-items:center;
  justify-content:space-between;gap:26px;flex-wrap:wrap;
}
.glass-band h2{font-size:clamp(22px,2.6vw,30px);margin-bottom:8px}
.glass-band p{color:var(--t-mute);margin:0;font-size:15px;max-width:620px}

/* ============ FAQ ============ */
.faq-wrap{max-width:900px}
.accordion-item{
  background:var(--glass);border:1px solid var(--line) !important;border-radius:var(--r-card);
  margin-bottom:12px;overflow:hidden;box-shadow:var(--sh-card);
}
.accordion-button{
  background:transparent;color:var(--t-strong);font-size:16.5px;font-weight:600;
  padding:18px 22px;box-shadow:none !important;border-left:2px solid var(--brand);
  display:flex;align-items:center;justify-content:space-between;gap:14px;
  transition:color .2s ease,background .2s ease,border-color .2s ease;
}
.accordion-button:hover{background:rgba(18,211,198,.05);border-left-color:var(--cta)}
.accordion-button:not(.collapsed){color:var(--brand);background:rgba(18,211,198,.07)}
.accordion-button::after{
  content:"+";background-image:none;width:auto;height:auto;font-size:22px;line-height:1;
  color:var(--brand);transform:none;transition:color .2s ease;flex:0 0 auto;
}
.accordion-button:not(.collapsed)::after{content:"−";color:var(--cta)}
.accordion-button:focus{box-shadow:none !important;outline:2px solid var(--brand);outline-offset:-2px}
.accordion-body{padding:4px 22px 22px;color:var(--t-body);font-size:15px}

/* ============ footer ============ */
.site-footer{background:var(--bg-900);border-top:1px solid var(--line);padding-top:56px;margin-top:24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px;padding-bottom:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand .brand-mark{width:34px;height:34px;flex:0 0 34px;font-size:16px}
.footer-brand .brand-name{font-size:16px;color:var(--t-strong);font-weight:700}
.footer-about{font-size:13.5px;color:var(--t-mute);max-width:290px;margin:0 0 16px}
.footer-contact{font-size:13.5px;color:var(--t-mute);line-height:1.9}
.footer-col h4{font-size:14px;color:var(--t-strong);margin-bottom:16px;letter-spacing:.04em}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{font-size:13.5px;color:var(--t-mute)}
.footer-col ul li a:hover{color:var(--brand)}
.footer-bottom{
  border-top:1px solid var(--line);padding:20px 0 28px;display:flex;justify-content:space-between;
  gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--t-mute);
}
.footer-bottom a{color:var(--t-mute)}
.footer-bottom a:hover{color:var(--brand)}

/* ============ 吸底条 ============ */
.sticky-down{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:900;height:72px;
  align-items:center;gap:12px;padding:0 16px;
  background:rgba(7,11,18,.96);border-top:1px solid var(--line);
}
.sticky-down .btn-cta{flex:1;padding:12px 14px}
.sticky-down .btn-ghost{flex:0 0 auto}

@media (max-width:1199.98px){
  .hero-grid{grid-template-columns:6fr 5fr;gap:32px}
}
@media (max-width:991.98px){
  :root{--sp-sec:64px}
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .row-card{grid-template-columns:1fr}
  .row-media{min-height:220px;aspect-ratio:16/9}
  .steps{grid-template-columns:repeat(2,1fr)}
  .req-grid{grid-template-columns:1fr;gap:18px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
  .search-panel{position:absolute;left:0;right:0;top:100%;background:rgba(7,11,18,.98);padding:16px 24px 20px}
  .search-form{max-width:1200px;margin:0 auto}
}
@media (max-width:767.98px){
  :root{--sp-sec:44px}
  .glass,.row-card,.req-card,.step,.accordion-item,.glass-band{backdrop-filter:none}
  .row-card,.req-card,.step,.accordion-item,.glass-band{background:rgba(255,255,255,.05)}
  .brand-sub{display:none}
  .ghost-link{display:none}
  .menu-btn{display:grid}
  .topbar-links a:last-child{display:none}
  .spec-list{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;padding-bottom:96px}
  .site-footer{padding-bottom:0}
}
@media (max-width:575.98px){
  .shell{padding:0 16px}
  .channel-list{padding:0 16px}
  .hero{padding:38px 0 34px}
  .hero-actions{gap:10px}
  .hero-actions .btn-cta,.hero-actions .btn-ghost{width:100%}
  .row-body{padding:20px 18px}
  .glass-band{padding:26px 20px}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .kv{flex-direction:column;gap:2px}
  .kv strong{text-align:left}
}
@media (max-width:767.98px){
  .sticky-down{display:flex}
  body{padding-bottom:0}
}
@media (prefers-reduced-motion:reduce){
  *{transition:none !important;animation:none !important}
}

/* roulang page: category3 */
:root{
  --bg-900:#070B12;
  --bg-800:#0C1420;
  --bg-700:#121C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.16);
  --brand:#12D3C6;
  --brand-dim:rgba(18,211,198,.14);
  --cta:#FF7A45;
  --violet:#7A6BFF;
  --text-title:#E8EEF6;
  --text-body:#B7C2D0;
  --text-muted:#8A97A8;
  --danger:#FF6B6B;
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(255,255,255,.07);
  --radius-card:16px;
  --radius-btn:12px;
  --radius-img:14px;
  --radius-pill:999px;
  --radius-input:10px;
  --shadow-card:0 18px 40px -24px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.04);
  --shadow-card-hover:0 28px 60px -28px rgba(18,211,198,.28), inset 0 1px 0 rgba(255,255,255,.06);
  --shadow-cta:0 10px 30px -8px rgba(255,122,69,.55), 0 0 0 1px rgba(255,122,69,.45);
  --fs-h1:clamp(30px,4.6vw,52px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:clamp(18px,1.6vw,22px);
  --fs-body:16px;
  --fs-sm:14px;
  --fs-meta:13px;
  --lh-body:1.85;
  --section-y:88px;
  --gap-title:24px;
  --shell:1200px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--bg-900);
  color:var(--text-body);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease),opacity .2s var(--ease);}
a:hover{color:#5BE9DE;}
button{font-family:inherit;}
h1,h2,h3,h4{color:var(--text-title);margin:0;font-weight:700;letter-spacing:.01em;}
h1{font-size:var(--fs-h1);line-height:1.15;}
h2{font-size:var(--fs-h2);line-height:1.3;}
h3{font-size:var(--fs-h3);line-height:1.45;}
p{margin:0 0 14px;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 24px;}
.section{padding:var(--section-y) 0;position:relative;}
.section-head{margin-bottom:var(--gap-title);display:flex;align-items:flex-end;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.section-head p{margin:10px 0 0;color:var(--text-muted);font-size:var(--fs-sm);max-width:680px;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);margin-bottom:14px;font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--brand);display:block;}
.mono{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;letter-spacing:.04em;}

/* ---------- 顶条 ---------- */
.topbar{
  height:32px;background:var(--bg-900);border-bottom:1px solid var(--line);
  font-size:12px;color:var(--text-muted);
}
.topbar .shell{display:flex;align-items:center;justify-content:space-between;height:100%;}
.topbar-links{display:flex;gap:18px;align-items:center;}
.topbar-links a{color:var(--text-muted);}
.topbar-links a:hover{color:var(--brand);}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(7,11,18,.86);
  backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
}
.brand-row{padding:14px 0;}
.brand-row .shell{display:flex;align-items:center;justify-content:space-between;gap:20px;}
.brand{display:flex;align-items:center;gap:12px;}
.brand-mark{
  width:38px;height:38px;border-radius:12px;flex:none;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;color:#04110F;font-size:18px;
  background:linear-gradient(150deg,#12D3C6,#3FE3D7);
  box-shadow:0 8px 22px -10px rgba(18,211,198,.75);
}
.brand-name{font-size:18px;font-weight:700;color:var(--text-title);letter-spacing:.02em;}
.brand-sub{display:block;font-size:11px;color:var(--text-muted);letter-spacing:.16em;text-transform:uppercase;}
.brand-tools{display:flex;align-items:center;gap:16px;}
.icon-btn{
  width:38px;height:38px;border-radius:var(--radius-pill);
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);background:transparent;color:var(--text-body);
  transition:all .2s var(--ease);
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-dim);}
.text-link{font-size:var(--fs-sm);color:var(--text-body);}
.text-link:hover{color:var(--brand);}
.btn-cta{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-btn);
  font-size:var(--fs-sm);font-weight:600;color:#2A0E03;
  background:linear-gradient(180deg,#FF8E5C,#FF6A32);
  border:none;box-shadow:var(--shadow-cta);
  transition:transform .2s var(--ease),filter .2s var(--ease),box-shadow .2s var(--ease);
}
.btn-cta:hover{filter:brightness(1.08);transform:translateY(-2px);color:#2A0E03;
  box-shadow:0 14px 38px -8px rgba(255,122,69,.62),0 0 0 1px rgba(255,122,69,.5);}
.btn-cta:active{transform:translateY(1px);box-shadow:none;}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 20px;border-radius:var(--radius-btn);
  font-size:var(--fs-sm);font-weight:600;color:var(--text-title);
  background:transparent;border:1px solid var(--line-strong);
  transition:all .2s var(--ease);
}
.btn-ghost:hover{border-color:var(--brand);background:var(--brand-dim);color:var(--brand);}
.hamburger{display:none;}

.channel-row{border-top:1px solid var(--line);}
.channel-list{
  display:flex;gap:30px;overflow-x:auto;scrollbar-width:none;
  max-width:var(--shell);margin:0 auto;padding:0 24px;
}
.channel-list::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;flex:none;
  padding:14px 0 15px;font-size:var(--fs-sm);color:var(--text-muted);
  border-bottom:2px solid transparent;transition:color .2s var(--ease),border-color .2s var(--ease);
}
.channel-link:hover{color:var(--text-title);border-bottom-color:rgba(18,211,198,.5);}
.channel-link.active{color:var(--text-title);border-bottom-color:var(--brand);font-weight:600;}

/* ---------- Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(900px 300px at 20% -10%,rgba(18,211,198,.16),transparent 70%),
    linear-gradient(180deg,rgba(12,20,32,.2),rgba(7,11,18,.95)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.10) 1px,transparent 1px);
  background-size:22px 22px;opacity:.06;
}
.page-hero .shell{position:relative;z-index:2;padding-top:56px;padding-bottom:64px;}
.crumbs{font-size:12px;color:var(--text-muted);margin-bottom:22px;display:flex;gap:8px;flex-wrap:wrap;}
.crumbs a{color:var(--text-muted);}
.crumbs a:hover{color:var(--brand);}
.crumbs .current{color:var(--brand);}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:44px;align-items:center;}
.hero-lead{margin:18px 0 0;font-size:17px;color:var(--text-body);max-width:640px;}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tag{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:var(--radius-pill);
  font-size:12px;color:var(--text-body);
  background:var(--glass);border:1px solid var(--line);
}
.tag i{color:var(--brand);font-size:11px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px;}
.hero-facts{display:flex;gap:26px;flex-wrap:wrap;margin-top:34px;padding-top:22px;border-top:1px dashed var(--line-strong);}
.hero-fact b{display:block;color:var(--text-title);font-size:18px;line-height:1.2;}
.hero-fact span{font-size:12px;color:var(--text-muted);}
.hero-card{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--radius-card);
  backdrop-filter:blur(14px) saturate(120%);
  box-shadow:var(--shadow-card);
  padding:14px;
}
.hero-card img{border-radius:var(--radius-img);aspect-ratio:4/3;object-fit:cover;width:100%;}
.hero-card-body{padding:16px 6px 6px;}
.hero-card-body h3{font-size:16px;margin-bottom:6px;}
.hero-card-body p{font-size:var(--fs-meta);color:var(--text-muted);margin:0;}
.hero-card-strip{
  margin-top:12px;display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 14px;border-radius:var(--radius-btn);
  background:rgba(18,211,198,.08);border:1px solid rgba(18,211,198,.28);
  font-size:var(--fs-meta);color:var(--text-title);
}
.hero-card-strip i{color:var(--brand);}

/* ---------- 通用卡片 ---------- */
.glass-card{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  box-shadow:var(--shadow-card);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.glass-card:hover{transform:translateY(-3px);border-color:rgba(18,211,198,.4);box-shadow:var(--shadow-card-hover);}
.badge-soft{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-pill);font-size:12px;
  background:linear-gradient(120deg,rgba(122,107,255,.22),rgba(18,211,198,.18));
  border:1px solid rgba(122,107,255,.35);color:#CFD6FF;
}

/* ---------- 快速定位 ---------- */
.locate-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.locate-item{padding:22px 20px;}
.locate-item i.locate-ico{
  display:inline-flex;width:40px;height:40px;border-radius:12px;
  align-items:center;justify-content:center;font-size:16px;color:var(--brand);
  background:var(--brand-dim);border:1px solid rgba(18,211,198,.28);margin-bottom:14px;
}
.locate-item h3{font-size:16px;margin-bottom:8px;}
.locate-item p{font-size:var(--fs-sm);color:var(--text-muted);margin:0;}

/* ---------- 主区：时间轴 + 粘性侧栏 ---------- */
.body-grid{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start;}
.timeline{position:relative;padding-left:34px;}
.timeline::before{
  content:"";position:absolute;left:9px;top:8px;bottom:8px;width:1px;
  background:linear-gradient(180deg,rgba(18,211,198,.55),rgba(122,107,255,.28),rgba(255,255,255,.06));
}
.tl-item{position:relative;padding-bottom:26px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;left:-34px;top:22px;width:19px;height:19px;border-radius:50%;
  background:var(--bg-900);border:1px solid rgba(18,211,198,.6);
  display:flex;align-items:center;justify-content:center;
}
.tl-dot::after{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand);}
.tl-item:nth-child(even) .tl-dot{border-color:rgba(122,107,255,.6);}
.tl-item:nth-child(even) .tl-dot::after{background:var(--violet);}
.tl-card{padding:22px 24px;}
.tl-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:10px;}
.tl-step{
  font-size:12px;letter-spacing:.1em;color:var(--brand);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.tl-card h3{font-size:18px;}
.tl-card p{font-size:var(--fs-sm);color:var(--text-body);margin:0;}
.tl-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
.tl-meta span{
  font-size:12px;color:var(--text-muted);padding:4px 10px;border-radius:var(--radius-pill);
  border:1px dashed var(--line-strong);
}

/* 侧栏 */
.sticky-col{position:sticky;top:112px;display:grid;gap:20px;}
.side-card{padding:20px;}
.side-card h3{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px;}
.side-card h3 i{color:var(--brand);font-size:13px;}
.side-list li{border-top:1px solid var(--line);}
.side-list li:first-child{border-top:none;}
.side-list a{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:11px 0;font-size:var(--fs-sm);color:var(--text-body);
}
.side-list a:hover{color:var(--brand);}
.side-list a i{font-size:11px;color:var(--text-muted);}
.dl-card{
  padding:22px;border-radius:var(--radius-card);
  background:linear-gradient(160deg,rgba(18,211,198,.12),rgba(255,122,69,.08));
  border:1px solid rgba(18,211,198,.28);
}
.dl-card h3{font-size:16px;margin-bottom:6px;}
.dl-card p{font-size:var(--fs-meta);color:var(--text-muted);margin-bottom:16px;}
.dl-card .btn-cta,.dl-card .btn-ghost{width:100%;justify-content:center;margin-bottom:10px;}
.dl-card .btn-ghost{margin-bottom:0;}
.side-note{font-size:12px;color:var(--text-muted);line-height:1.7;}

/* ---------- 问题归类 ---------- */
.issue-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.issue-card{padding:24px;display:flex;gap:18px;}
.issue-card .ico{
  flex:none;width:46px;height:46px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  background:rgba(255,122,69,.12);color:var(--cta);border:1px solid rgba(255,122,69,.3);
}
.issue-card h3{font-size:17px;margin-bottom:8px;}
.issue-card p{font-size:var(--fs-sm);color:var(--text-muted);margin:0;}

/* ---------- 安全建议 ---------- */
.advice-wrap{
  background:var(--bg-800);border:1px solid var(--line);border-radius:24px;padding:44px;
}
.advice-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px 40px;margin-top:8px;}
.advice-item{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line-strong);}
.advice-item i{color:var(--brand);margin-top:5px;font-size:14px;}
.advice-item b{display:block;color:var(--text-title);font-size:15px;margin-bottom:4px;}
.advice-item span{font-size:var(--fs-sm);color:var(--text-muted);}

/* ---------- FAQ ---------- */
.faq-wrap{max-width:900px;margin:0 auto;}
.accordion-item{
  background:var(--glass);border:1px solid var(--line);border-radius:var(--radius-card);
  margin-bottom:14px;overflow:hidden;
}
.accordion-button{
  background:transparent;color:var(--text-title);font-size:16px;font-weight:600;
  padding:20px 22px 20px 24px;border-left:2px solid var(--brand);
  box-shadow:none;
}
.accordion-button:not(.collapsed){background:rgba(18,211,198,.06);color:var(--brand);border-left-color:var(--cta);}
.accordion-button:focus{box-shadow:none;border-color:var(--brand);}
.accordion-button::after{display:none;}
.accordion-button .sign{
  margin-left:auto;font-family:ui-monospace,Menlo,Consolas,monospace;
  font-size:18px;color:var(--brand);line-height:1;
}
.accordion-body{padding:0 24px 22px;font-size:var(--fs-sm);color:var(--text-body);border-left:2px solid transparent;}
.accordion-item:hover{border-color:rgba(18,211,198,.35);}

/* ---------- CTA ---------- */
.cta-band{
  border-radius:24px;padding:48px;text-align:center;position:relative;overflow:hidden;
  background:
    radial-gradient(600px 200px at 50% 0%,rgba(18,211,198,.18),transparent 70%),
    linear-gradient(180deg,rgba(255,255,255,.055),rgba(255,255,255,.02));
  border:1px solid rgba(18,211,198,.28);
  backdrop-filter:blur(14px) saturate(120%);
}
.cta-band h2{font-size:clamp(22px,2.6vw,32px);margin-bottom:14px;}
.cta-band p{max-width:640px;margin:0 auto 28px;color:var(--text-body);font-size:var(--fs-sm);}
.cta-actions{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-900);border-top:1px solid var(--line);padding:64px 0 26px;margin-top:0;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px;font-size:15px;}
.footer-brand .brand-name{font-size:16px;}
.footer-about{font-size:var(--fs-sm);color:var(--text-muted);max-width:320px;}
.footer-contact{font-size:var(--fs-meta);color:var(--text-muted);line-height:2;}
.footer-col h4{font-size:14px;margin-bottom:16px;color:var(--text-title);}
.footer-col ul li{margin-bottom:10px;}
.footer-col ul a{font-size:var(--fs-sm);color:var(--text-muted);}
.footer-col ul a:hover{color:var(--brand);}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12px;color:var(--text-muted);
}
.footer-bottom a{color:var(--text-muted);}
.footer-bottom a:hover{color:var(--brand);}

/* ---------- 响应式 ---------- */
@media (max-width:1199.98px){
  .locate-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:991.98px){
  :root{--section-y:64px;}
  .hero-grid{grid-template-columns:1fr;gap:32px;}
  .body-grid{grid-template-columns:1fr;gap:32px;}
  .sticky-col{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .advice-wrap{padding:32px;}
}
@media (max-width:767.98px){
  :root{--section-y:44px;--fs-body:15px;}
  .shell{padding:0 18px;}
  .glass-card,.hero-card,.page-hero .hero-card{backdrop-filter:none;background:rgba(255,255,255,.05);}
  .hero-card,.cta-band,.advice-wrap{backdrop-filter:none;}
  .channel-list{padding:0 18px;gap:22px;}
  .brand-sub{display:none;}
  .brand-tools .text-link,.brand-tools .icon-btn.search{display:none;}
  .hamburger{display:inline-flex;}
  .issue-grid{grid-template-columns:1fr;}
  .advice-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .cta-band{padding:32px 22px;}
  .timeline{padding-left:28px;}
  .tl-dot{left:-28px;}
  .footer-bottom{margin-top:30px;}
}
@media (max-width:575.98px){
  .locate-grid{grid-template-columns:1fr;}
  .hero-facts{gap:18px;}
  .hero-actions .btn-cta,.hero-actions .btn-ghost{flex:1 1 100%;justify-content:center;}
  .tl-card{padding:18px;}
  .brand-name{font-size:16px;}
}

/* roulang page: category2 */
:root{
  --bg-900:#070B12;
  --bg-800:#0C1420;
  --bg-700:#121C2B;
  --line:rgba(255,255,255,.08);
  --line-strong:rgba(255,255,255,.14);
  --brand:#12D3C6;
  --cta:#FF7A45;
  --violet:#7A6BFF;
  --text:#E8EEF6;
  --text-body:#B7C2D0;
  --text-muted:#8A97A8;
  --glass:rgba(255,255,255,.045);
  --glass-strong:rgba(255,255,255,.075);
  --r-card:16px;
  --r-btn:12px;
  --r-img:14px;
  --r-pill:999px;
  --sh-card:0 18px 40px -24px rgba(0,0,0,.8), inset 0 1px 0 rgba(255,255,255,.04);
  --sh-card-hover:0 28px 60px -28px rgba(18,211,198,.28);
  --sh-cta:0 10px 30px -8px rgba(255,122,69,.55), 0 0 0 1px rgba(255,122,69,.45);
  --sp-section:88px;
  --fs-h1:clamp(30px,4.6vw,52px);
  --fs-h2:clamp(24px,3vw,36px);
  --fs-h3:20px;
  --fs-body:15px;
  --fs-meta:13px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --nav-z:1000;
  --drawer-z:1100;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  padding:0;
  background-color:var(--bg-900);
  color:var(--text-body);
  font-family:system-ui,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:var(--fs-body);
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
  color-scheme:dark;
}
body::before{
  content:"";
  position:fixed;
  left:0;right:0;top:0;
  height:320px;
  background:radial-gradient(60% 100% at 50% 0%,rgba(18,211,198,.16),transparent 70%);
  pointer-events:none;
  z-index:0;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.55) 1px,transparent 1px);
  background-size:26px 26px;
  opacity:.05;
  pointer-events:none;
  z-index:0;
}
img{max-width:100%;display:block;}
a{color:var(--brand);text-decoration:none;}
a:hover{color:var(--brand);}
h1,h2,h3,h4{color:var(--text);margin:0;font-weight:700;line-height:1.3;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
button{font-family:inherit;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:2000;
  background:var(--brand);color:#04211E;padding:10px 18px;border-radius:0 0 10px 0;font-size:13px;
}
.skip-link:focus{left:0;}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
  clip:rect(0,0,0,0);white-space:nowrap;border:0;
}
.shell{
  width:100%;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;
  top:0;
  z-index:var(--nav-z);
  background:rgba(7,11,18,.88);
  backdrop-filter:blur(14px) saturate(120%);
  -webkit-backdrop-filter:blur(14px) saturate(120%);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease),background-color .25s var(--ease);
}
.site-header.is-scrolled{
  box-shadow:0 18px 40px -30px rgba(0,0,0,.95);
  background:rgba(7,11,18,.95);
}
.topbar{
  height:32px;
  display:flex;
  align-items:center;
  font-size:12px;
  color:var(--text-muted);
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.02);
}
.topbar .shell{display:flex;align-items:center;justify-content:space-between;gap:16px;}
.topbar-links{display:flex;gap:18px;}
.topbar-links a{color:var(--text-muted);font-size:12px;transition:color .2s var(--ease);}
.topbar-links a:hover{color:var(--brand);}
.brand-row{border-bottom:1px solid var(--line);}
.brand-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  min-height:66px;
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;}
.brand-mark{
  width:34px;height:34px;border-radius:10px;
  display:grid;place-items:center;
  font-size:16px;font-weight:700;color:#06231F;
  background:linear-gradient(160deg,#12D3C6,#0E9E96);
  box-shadow:0 10px 24px -12px rgba(18,211,198,.9);
  letter-spacing:0;
}
.brand-name{font-size:17px;font-weight:700;color:var(--text);letter-spacing:.01em;}
.brand-tools{display:flex;align-items:center;gap:12px;}
.icon-btn{
  width:38px;height:38px;
  display:grid;place-items:center;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  background:var(--glass);
  color:var(--text-body);
  cursor:pointer;
  transition:all .22s var(--ease);
}
.icon-btn:hover{border-color:rgba(18,211,198,.5);color:var(--brand);background:rgba(18,211,198,.08);}
.icon-btn:active{transform:translateY(1px);}
.support-link{
  font-size:13px;color:var(--text-muted);padding:6px 4px;
  transition:color .2s var(--ease);
}
.support-link:hover{color:var(--brand);}
.btn-main{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border:0;
  border-radius:var(--r-btn);
  font-size:15px;
  font-weight:600;
  color:#200D04;
  background:linear-gradient(180deg,#FF8E5C,#FF6A32);
  box-shadow:var(--sh-cta);
  cursor:pointer;
  transition:filter .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.btn-main:hover{
  color:#200D04;
  filter:brightness(1.08);
  transform:translateY(-2px);
  box-shadow:0 16px 38px -8px rgba(255,122,69,.68), 0 0 0 1px rgba(255,122,69,.5);
}
.btn-main:active{transform:translateY(1px);box-shadow:0 0 0 1px rgba(255,122,69,.5);}
.btn-main-sm{padding:10px 18px;font-size:14px;border-radius:10px;}
.btn-ghost{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 24px;
  border-radius:var(--r-btn);
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--text);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  transition:all .22s var(--ease);
}
.btn-ghost:hover{
  color:var(--text);
  border-color:rgba(18,211,198,.6);
  background:rgba(18,211,198,.08);
  transform:translateY(-2px);
}
.btn-ghost:active{transform:translateY(1px);}
.btn-ghost:focus-visible,.btn-main:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.btn-download{padding:10px 20px;font-size:14px;}
.menu-toggle{
  display:none;
  width:40px;height:40px;
  padding:0;
  border-radius:12px;
  border:1px solid var(--line-strong);
  background:var(--glass);
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:4px;
}
.menu-toggle span{display:block;width:16px;height:1.5px;background:var(--text);border-radius:2px;transition:all .22s var(--ease);}
.menu-toggle:hover{border-color:rgba(18,211,198,.5);}
.menu-toggle:hover span{background:var(--brand);}

.channel-row{
  position:relative;
  border-bottom:1px solid var(--line);
  background:rgba(12,20,32,.6);
}
.channel-list{
  display:flex;
  align-items:center;
  gap:30px;
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  overflow-x:auto;
  scrollbar-width:none;
}
.channel-list::-webkit-scrollbar{display:none;}
.channel-link{
  position:relative;
  display:block;
  padding:14px 2px;
  font-size:14px;
  color:var(--text-muted);
  white-space:nowrap;
  transition:color .2s var(--ease);
}
.channel-link::after{
  content:"";
  position:absolute;
  left:0;right:0;bottom:0;
  height:2px;
  background:var(--brand);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .25s var(--ease);
}
.channel-link:hover{color:var(--text);}
.channel-link:hover::after{transform:scaleX(1);}
.channel-link.active{color:var(--text);font-weight:600;}
.channel-link.active::after{transform:scaleX(1);}
.channel-link:focus-visible{outline:2px solid var(--brand);outline-offset:-2px;border-radius:4px;}

/* ============ 移动端抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;
  background:rgba(4,8,14,.7);
  z-index:calc(var(--drawer-z) - 1);
}
.mobile-drawer{
  position:fixed;
  top:0;right:0;bottom:0;
  width:min(320px,86vw);
  z-index:var(--drawer-z);
  background:rgba(12,20,32,.97);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-left:1px solid var(--line);
  padding:22px;
  transform:translateX(105%);
  transition:transform .3s var(--ease);
  display:flex;
  flex-direction:column;
  gap:20px;
}
.mobile-drawer.is-open{transform:translateX(0);}
.drawer-head{display:flex;align-items:center;justify-content:space-between;}
.drawer-close{
  width:34px;height:34px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  background:transparent;
  color:var(--text-body);
  font-size:18px;
  line-height:1;
  cursor:pointer;
  transition:all .2s var(--ease);
}
.drawer-close:hover{border-color:rgba(18,211,198,.5);color:var(--brand);}
.drawer-nav{display:flex;flex-direction:column;gap:4px;}
.drawer-nav a{
  padding:12px 14px;
  border-radius:10px;
  color:var(--text-body);
  font-size:14px;
  transition:all .2s var(--ease);
}
.drawer-nav a:hover{background:rgba(18,211,198,.08);color:var(--text);}
.drawer-nav a.active{background:rgba(18,211,198,.12);color:var(--brand);font-weight:600;}
.drawer-cta{margin-top:auto;}

/* ============ 页面首屏 ============ */
.page-hero{
  position:relative;
  z-index:1;
  padding:56px 0 60px;
  overflow:hidden;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background:url(/assets/images/backpic/back-1.webp) center/cover no-repeat;
  opacity:.2;
  z-index:0;
}
.page-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(7,11,18,.72) 0%,rgba(7,11,18,.9) 62%,var(--bg-900) 100%);
  z-index:0;
}
.hero-inner{position:relative;z-index:2;}
.breadcrumb-line{
  display:flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  color:var(--text-muted);
  margin-bottom:20px;
}
.breadcrumb-line a{color:var(--text-muted);transition:color .2s var(--ease);}
.breadcrumb-line a:hover{color:var(--brand);}
.breadcrumb-line .sep{color:rgba(255,255,255,.22);}
.breadcrumb-line .current{color:var(--brand);}
.hero-title{
  font-size:var(--fs-h1);
  line-height:1.15;
  letter-spacing:.01em;
  max-width:900px;
}
.hero-lead{
  margin-top:18px;
  max-width:720px;
  font-size:16px;
  color:var(--text-body);
}
.hero-stats{
  display:flex;
  flex-wrap:wrap;
  margin-top:28px;
  gap:0;
}
.stat{
  padding:0 22px;
  border-left:1px dashed rgba(255,255,255,.16);
}
.stat:first-child{padding-left:0;border-left:0;}
.stat-k{display:block;font-size:12px;color:var(--text-muted);letter-spacing:.04em;}
.stat-v{display:block;font-size:14px;color:var(--text);margin-top:2px;}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}

/* ============ 通用板块 ============ */
.section{
  position:relative;
  z-index:1;
  padding:var(--sp-section) 0;
}
.section-alt{background:rgba(12,20,32,.55);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{margin-bottom:34px;max-width:800px;}
.section-head h2{font-size:var(--fs-h2);}
.section-desc{margin-top:12px;font-size:14px;color:var(--text-muted);max-width:680px;}

/* ============ 筛选条 ============ */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px 16px;
  margin-bottom:32px;
  border:1px solid var(--line);
  border-radius:var(--r-card);
  background:var(--glass);
  box-shadow:var(--sh-card);
}
.filter-chips{display:flex;flex-wrap:wrap;gap:10px;}
.filter-chip{
  padding:7px 16px;
  border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.12);
  background:transparent;
  color:var(--text-muted);
  font-size:13px;
  cursor:pointer;
  transition:all .22s var(--ease);
}
.filter-chip:hover{border-color:rgba(122,107,255,.6);color:var(--text);}
.filter-chip.active{
  background:rgba(18,211,198,.12);
  border-color:rgba(18,211,198,.5);
  color:#C9FBF6;
  font-weight:600;
}
.filter-chip:focus-visible{outline:2px solid var(--brand);outline-offset:2px;}
.filter-search{display:flex;align-items:center;gap:10px;flex:1;min-width:260px;max-width:400px;}
.filter-search input{
  flex:1;
  height:42px;
  padding:0 14px;
  border-radius:10px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.04);
  color:var(--text);
  font-size:13px;
  transition:all .22s var(--ease);
}
.filter-search input::placeholder{color:rgba(138,151,168,.75);}
.filter-search input:focus{
  outline:none;
  border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(18,211,198,.18);
}

/* ============ 功能卡片网格 ============ */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:26px;
}
.feature-card{
  display:flex;
  flex-direction:column;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:var(--sh-card);
  overflow:hidden;
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.feature-card:hover{
  transform:translateY(-3px);
  border-color:rgba(18,211,198,.4);
  box-shadow:var(--sh-card-hover);
}
.card-media{
  position:relative;
  aspect-ratio:16/9;
  overflow:hidden;
  background:var(--bg-700);
}
.card-media img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .5s var(--ease);
}
.feature-card:hover .card-media img{transform:scale(1.04);}
.card-badge{
  position:absolute;
  left:14px;top:14px;
  padding:4px 13px;
  border-radius:var(--r-pill);
  font-size:12px;
  font-weight:600;
  color:#07131B;
  background:linear-gradient(135deg,rgba(122,107,255,.92),rgba(18,211,198,.9));
}
.card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
.card-title{font-size:18px;line-height:1.45;}
.card-text{
  font-size:14px;
  color:var(--text-body);
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.card-meta{
  margin-top:auto;
  padding-top:12px;
  border-top:1px solid var(--line);
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:10px;
  font-size:12px;
  color:var(--text-muted);
}
.card-meta .dot{width:3px;height:3px;border-radius:50%;background:rgba(255,255,255,.28);}

/* ============ 分页 ============ */
.pager{
  display:flex;
  justify-content:center;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  margin-top:42px;
}
.pager a,.pager span{
  min-width:40px;
  height:40px;
  padding:0 14px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:10px;
  border:1px solid var(--line);
  color:var(--text-muted);
  font-size:13px;
  transition:all .22s var(--ease);
}
.pager a:hover{border-color:rgba(18,211,198,.5);color:var(--text);background:rgba(18,211,198,.06);}
.pager .is-current{
  background:rgba(18,211,198,.12);
  border-color:rgba(18,211,198,.5);
  color:var(--brand);
  font-weight:600;
}
.pager .is-disabled{opacity:.42;cursor:not-allowed;}

/* ============ 功能速查 ============ */
.spec-layout{
  display:grid;
  grid-template-columns:minmax(0,5fr) minmax(0,7fr);
  gap:40px;
  align-items:start;
}
.spec-figure{
  position:relative;
  border-radius:var(--r-card);
  overflow:hidden;
  border:1px solid var(--line);
  box-shadow:var(--sh-card);
}
.spec-figure img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3;}
.spec-figure figcaption{
  position:absolute;
  left:0;right:0;bottom:0;
  padding:14px 16px;
  font-size:12px;
  color:var(--text-body);
  background:linear-gradient(180deg,transparent,rgba(7,11,18,.9));
}
.spec-list{
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:var(--sh-card);
  padding:6px 22px;
}
.spec-row{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap:24px;
  padding:16px 0;
  border-bottom:1px solid var(--line);
}
.spec-row:last-child{border-bottom:0;}
.spec-key{font-size:13px;color:var(--text-muted);flex:0 0 auto;}
.spec-val{font-size:14px;color:var(--text);text-align:right;}

/* ============ 使用流程 ============ */
.steps{
  display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));
  gap:22px;
  counter-reset:step;
}
.step{
  position:relative;
  padding:24px 20px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:var(--sh-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.step:hover{
  transform:translateY(-3px);
  border-color:rgba(18,211,198,.4);
  box-shadow:var(--sh-card-hover);
}
.step-num{
  display:inline-grid;
  place-items:center;
  width:34px;height:34px;
  margin-bottom:14px;
  border-radius:10px;
  font-size:14px;
  font-weight:700;
  color:#0A1A17;
  background:linear-gradient(160deg,#12D3C6,#0E9E96);
}
.step h3{font-size:16px;margin-bottom:8px;}
.step p{font-size:13px;color:var(--text-body);}

/* ============ 用户反馈 ============ */
.quote-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:22px;
}
.quote-card{
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:24px;
  border-radius:var(--r-card);
  border:1px solid var(--line);
  background:var(--glass);
  box-shadow:var(--sh-card);
  transition:transform .22s var(--ease),border-color .22s var(--ease),box-shadow .22s var(--ease);
}
.quote-card:hover{
  transform:translateY(-3px);
  border-color:rgba(18,211,198,.4);
  box-shadow:var(--sh-card-hover);
}
.quote-top{display:flex;align-items:center;gap:12px;}
.avatar{
  width:42px;height:42px;
  border-radius:50%;
  display:grid;place-items:center;
  font-size:15px;font-weight:700;color:#06231F;
  background:linear-gradient(150deg,rgba(18,211,198,.9),rgba(122,107,255,.85));
  flex:0 0 auto;
}
.quote-name{font-size:14px;color:var(--text);font-weight:600;}
.stars{font-size:13px;color:var(--cta);letter-spacing:2px;}
.quote-text{font-size:14px;color:var(--text-body);}
.quote-tag{
  align-self:flex-start;
  margin-top:auto;
  padding:4px 13px;
  border-radius:var(--r-pill);
  border:1px solid var(--line-strong);
  font-size:12px;
  color:var(--text-muted);
}

/* ============ FAQ ============ */
.faq-wrap{max-width:880px;}
.faq .accordion-item{
  background:var(--glass);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  margin-bottom:12px;
  overflow:hidden;
}
.faq .accordion-item:last-child{margin-bottom:0;}
.faq .accordion-button{
  background:transparent;
  color:var(--text);
  font-size:16px;
  font-weight:600;
  padding:18px 20px 18px 22px;
  border:0;
  border-left:2px solid var(--brand);
  box-shadow:none;
  transition:background-color .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease);
}
.faq .accordion-button:not(.collapsed){
  background:rgba(18,211,198,.07);
  color:var(--text);
  box-shadow:none;
}
.faq .accordion-button:hover{border-left-color:var(--cta);}
.faq .accordion-button:focus{box-shadow:0 0 0 2px rgba(18,211,198,.4);z-index:2;}
.faq .accordion-button::after{
  content:"+";
  background-image:none;
  width:auto;height:auto;
  font-size:20px;
  font-weight:400;
  line-height:1;
  color:var(--brand);
  display:grid;
  place-items:center;
  transform:none;
  margin-left:16px;
}
.faq .accordion-button:not(.collapsed)::after{content:"−";transform:none;}
.faq .accordion-body{
  padding:0 22px 20px 22px;
  font-size:14px;
  color:var(--text-body);
  border-left:2px solid rgba(18,211,198,.35);
}

/* ============ CTA ============ */
.cta-wrap{padding-bottom:var(--sp-section);}
.cta-band{
  position:relative;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  flex-wrap:wrap;
  padding:40px 44px;
  border-radius:20px;
  border:1px solid rgba(18,211,198,.28);
  background:linear-gradient(140deg,rgba(18,211,198,.13),rgba(122,107,255,.09));
  box-shadow:var(--sh-card);
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  right:-80px;top:-80px;
  width:260px;height:260px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(18,211,198,.22),transparent 70%);
  pointer-events:none;
}
.cta-band h2{font-size:clamp(22px,2.6vw,30px);position:relative;z-index:1;}
.cta-band p{margin-top:10px;font-size:14px;color:var(--text-body);max-width:560px;position:relative;z-index:1;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;position:relative;z-index:1;}
.cta-note{margin-top:18px;font-size:12px;color:var(--text-muted);}

/* ============ 页脚 ============ */
.site-footer{
  position:relative;
  z-index:1;
  background:var(--bg-900);
  border-top:1px solid var(--line);
  padding-top:60px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.5fr 1fr 1fr 1fr;
  gap:32px;
  padding-bottom:44px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .brand-mark{width:32px;height:32px;font-size:15px;}
.footer-brand .brand-name{font-size:16px;}
.footer-about{
  font-size:13px;
  color:var(--text-muted);
  max-width:300px;
  margin-bottom:16px;
}
.footer-contact{font-size:13px;color:var(--text-muted);line-height:2;}
.footer-contact a{color:var(--text-muted);}
.footer-contact a:hover{color:var(--brand);}
.footer-col h4{
  font-size:14px;
  margin-bottom:16px;
  color:var(--text);
  letter-spacing:.02em;
}
.footer-col ul{display:flex;flex-direction:column;gap:10px;}
.footer-col a{
  font-size:13px;
  color:var(--text-muted);
  transition:color .2s var(--ease);
}
.footer-col a:hover{color:var(--brand);}
.footer-bottom{
  border-top:1px solid var(--line);
  padding:20px 0 32px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
  font-size:12px;
  color:var(--text-muted);
}
.footer-bottom a{color:var(--text-muted);}
.footer-bottom a:hover{color:var(--brand);}

/* ============ 响应式 ============ */
@media (max-width:1199px){
  .feature-grid{gap:22px;}
  .spec-layout{gap:30px;}
}
@media (max-width:991px){
  :root{--sp-section:64px;--fs-h3:19px;}
  .shell{padding:0 20px;}
  .channel-list{padding:0 20px;gap:24px;}
  .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;}
  .spec-layout{grid-template-columns:1fr;gap:26px;}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));}
  .quote-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .cta-band{padding:32px 28px;}
  .menu-toggle{display:flex;}
  .support-link{display:none;}
  .page-hero{padding:40px 0 48px;}
  .channel-row::after{
    content:"";
    position:absolute;
    right:0;top:0;bottom:0;
    width:36px;
    background:linear-gradient(90deg,transparent,rgba(7,11,18,.92));
    pointer-events:none;
  }
}
@media (max-width:767px){
  :root{--sp-section:52px;}
  .feature-card,.quote-card,.step,.spec-list,.filter-bar{backdrop-filter:none;-webkit-backdrop-filter:none;background:rgba(255,255,255,.05);}
  .hero-stats{gap:14px 0;}
  .stat{padding:0 16px;}
  .filter-bar{padding:12px;}
  .filter-search{max-width:none;width:100%;}
  .faq .accordion-button{font-size:15px;padding:16px 16px 16px 18px;}
}
@media (max-width:575px){
  :root{--sp-section:44px;}
  .shell{padding:0 16px;}
  .channel-list{padding:0 16px;gap:20px;}
  .brand-inner{min-height:60px;}
  .brand-name{font-size:15px;}
  .brand-mark{width:30px;height:30px;font-size:14px;}
  .btn-download{padding:9px 14px;font-size:13px;}
  .hero-actions .btn-main,.hero-actions .btn-ghost{width:100%;}
  .feature-grid{grid-template-columns:1fr;gap:16px;}
  .steps{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
  .spec-row{flex-direction:column;align-items:flex-start;gap:6px;}
  .spec-val{text-align:left;}
  .cta-band{padding:26px 20px;}
  .cta-actions .btn-main,.cta-actions .btn-ghost{width:100%;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}