/* roulang page: index */
:root{
  --ink:#0d1b2a;
  --ink-2:#1c2f49;
  --muted:#64748b;
  --line:#e3e9f3;
  --bg:#f6f8fc;
  --bg-soft:#eef3fb;
  --surface:#ffffff;
  --primary:#2b62f0;
  --primary-dark:#1b47c4;
  --primary-soft:#e8efff;
  --accent:#0fb8a4;
  --accent-soft:#e3f8f5;
  --warn:#d89a2a;
  --radius-lg:18px;
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
  --shadow-md:0 16px 40px rgba(13,27,42,.13);
  --shell:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;
  line-height:1.78;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.35;color:var(--ink);margin:0}
p{margin:0 0 12px}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(43,98,240,.45);outline-offset:2px;border-radius:6px}

.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 20px}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:200;
  background:rgba(255,255,255,.95);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:0 10px 26px rgba(13,27,42,.09)}
.nav-wrap{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-size:17.5px;font-weight:800;letter-spacing:.2px;white-space:nowrap;color:var(--ink)}
.brand:hover{color:var(--primary)}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(140deg,var(--primary),#5b8bff 55%,var(--accent));
  position:relative;box-shadow:0 6px 14px rgba(43,98,240,.28);
}
.brand-mark::after{
  content:"";position:absolute;inset:8px 9px;border-radius:4px;
  border:2px solid rgba(255,255,255,.92);border-bottom-color:transparent;
}
.nav-search{
  flex:1 1 auto;max-width:400px;display:flex;align-items:center;gap:8px;
  height:40px;padding:0 6px 0 14px;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;
  transition:border-color .2s,box-shadow .2s,background .2s;
}
.nav-search:focus-within{background:#fff;border-color:#b9cdf7;box-shadow:0 0 0 4px rgba(43,98,240,.12)}
.nav-search svg{flex:0 0 auto;color:#8a9ab4}
.nav-search input{
  flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
  font-size:14px;color:var(--ink);outline:none;
}
.nav-search input::placeholder{color:#94a3b8}
.nav-search button{
  flex:0 0 auto;height:30px;padding:0 15px;border:0;border-radius:999px;
  background:var(--primary);color:#fff;font-size:13px;font-weight:600;cursor:pointer;
  transition:background .2s,transform .2s;
}
.nav-search button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
  display:inline-flex;align-items:center;height:36px;padding:0 12px;
  font-size:14.5px;font-weight:600;color:var(--ink-2);border-radius:9px;white-space:nowrap;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--primary)}
.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-cta{
  display:inline-flex;align-items:center;height:38px;padding:0 18px;
  border-radius:9px;background:var(--ink);color:#fff;font-size:14px;font-weight:600;
  white-space:nowrap;transition:background .2s,transform .2s,box-shadow .2s;
}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(43,98,240,.3)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;width:42px;height:38px;
  border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;color:var(--ink-2);
}

/* ============ buttons / tags ============ */
.btn-solid,.btn-ghost,.btn-line{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 24px;border-radius:var(--radius-sm);
  font-size:15px;font-weight:700;cursor:pointer;border:1px solid transparent;
  transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn-solid{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(43,98,240,.28)}
.btn-solid:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,98,240,.34)}
.btn-line{background:#fff;color:var(--ink);border-color:#cfd9ea}
.btn-line:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff;transform:translateY(-2px)}
.tag{
  display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;background:var(--primary-soft);color:var(--primary-dark);
}
.tag--accent{background:var(--accent-soft);color:#0a7f72}
.tag--line{background:#fff;border:1px solid var(--line);color:var(--muted)}
.kicker{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;
  border-radius:999px;background:rgba(43,98,240,.1);color:var(--primary-dark);
  font-size:13px;font-weight:700;letter-spacing:.3px;margin-bottom:16px;
}
.kicker::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}

/* ============ hero ============ */
.hero{position:relative;overflow:hidden;padding:64px 0 76px;background:linear-gradient(180deg,#eef4ff 0%,#f6f8fc 78%)}
.hero-bg{
  position:absolute;inset:0;background:url('/assets/images/dda77d4ad5f497af.webp') center/cover no-repeat;
  opacity:.09;pointer-events:none;
}
.hero-grid{
  position:relative;display:grid;grid-template-columns:5fr 7fr;gap:52px;align-items:center;
}
.hero-copy h1{font-size:40px;font-weight:800;letter-spacing:-.5px;margin-bottom:16px}
.hero-copy h1 em{font-style:normal;color:var(--primary)}
.hero-lead{font-size:15px;color:#40536e;line-height:1.85;margin-bottom:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.kpi-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.kpi{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:13px 15px;box-shadow:var(--shadow-sm);
}
.kpi b{display:block;font-size:21px;font-weight:800;color:var(--primary);letter-spacing:-.4px}
.kpi span{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
.hero-media{position:relative;transform:rotate(-1.8deg) translateY(-10px)}
.hero-media img{
  position:relative;z-index:2;width:100%;aspect-ratio:16/11;object-fit:cover;
  border-radius:var(--radius-lg);box-shadow:var(--shadow-md);
}
.hero-media::after{
  content:"";position:absolute;z-index:1;inset:22px -20px -20px 24px;
  border:1px solid rgba(43,98,240,.32);border-radius:var(--radius-lg);
}
.hero-media-badge{
  position:absolute;z-index:3;left:-16px;bottom:24px;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:10px 16px;box-shadow:var(--shadow-md);font-size:13px;font-weight:700;color:var(--ink-2);
}
.hero-media-badge i{font-style:normal;color:var(--accent);font-weight:800}

/* ============ sections ============ */
.section{padding:66px 0}
.section--white{background:#fff}
.section--soft{background:var(--bg-soft)}
.section--dark{
  background:#0d1b2a;color:#dbe6f7;
  position:relative;overflow:hidden;
}
.section--dark h2,.section--dark h3{color:#fff}
.section--dark .section-desc{color:#9fb2cd}
.section--dark::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/6f077a7f789af1e0.webp') center/cover no-repeat;opacity:.14;
}
.section--dark .shell{position:relative;z-index:2}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:32px}
.section-head h2{font-size:27px;font-weight:800;letter-spacing:-.3px;margin-bottom:9px}
.section-desc{font-size:14.5px;color:var(--muted);max-width:660px;line-height:1.8;margin:0}
.section-more{
  flex:0 0 auto;font-size:14px;font-weight:700;color:var(--primary);
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
}
.section-more::after{content:"›";font-size:18px;line-height:1}
.section-more:hover{color:var(--primary-dark)}

/* ============ data board ============ */
.board{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.board-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px 22px 20px;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.board-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.board-item b{display:block;font-size:30px;font-weight:800;letter-spacing:-1px;color:var(--ink)}
.board-item b small{font-size:14px;font-weight:700;color:var(--muted);margin-left:3px}
.board-item span{display:block;font-size:13.5px;color:var(--muted);margin-top:6px}
.board-bar{height:5px;border-radius:99px;background:var(--bg-soft);margin-top:14px;overflow:hidden}
.board-bar i{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,var(--primary),var(--accent))}

/* ============ cards ============ */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.g-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.g-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.g-card h3{font-size:17px;font-weight:700;margin-bottom:9px}
.g-card p{font-size:14px;color:var(--muted);line-height:1.78;margin:0}
.g-icon{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:var(--primary-soft);color:var(--primary);margin-bottom:16px;
}
.g-icon svg{width:21px;height:21px}
.g-icon--accent{background:var(--accent-soft);color:#0a8a7c}

/* ============ rail ============ */
.rail{
  display:grid;grid-auto-flow:column;grid-auto-columns:minmax(272px,1fr);
  gap:18px;overflow-x:auto;padding:4px 4px 18px;scroll-snap-type:x mandatory;
}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-thumb{background:#cdd9ea;border-radius:99px}
.rail > *{scroll-snap-align:start}

.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.post-thumb{display:block;overflow:hidden;background:var(--bg-soft)}
.post-thumb img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .35s ease}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.post-body{padding:17px 19px 20px;display:flex;flex-direction:column;gap:9px;flex:1}
.post-body h3{font-size:15.5px;font-weight:700;line-height:1.55}
.post-ex{font-size:13.5px;color:var(--muted);line-height:1.72;margin:0}
.post-meta{display:flex;align-items:center;gap:10px;font-size:12.5px;color:#8c9bb1;margin-top:auto;padding-top:6px}
.post-meta .dot{width:3px;height:3px;border-radius:50%;background:#c3cede}

/* ============ feature big cards ============ */
.feature-card{
  display:grid;grid-template-rows:auto 1fr;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.feature-card img{width:100%;aspect-ratio:16/10;object-fit:cover}
.feature-card .fc-body{padding:20px 22px 24px;display:flex;flex-direction:column;gap:10px}
.feature-card h3{font-size:17.5px;font-weight:700}
.feature-card p{font-size:14px;color:var(--muted);margin:0}

/* ============ channel entry ============ */
.channel{
  position:relative;display:flex;flex-direction:column;gap:12px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.channel-num{font-size:12.5px;font-weight:800;letter-spacing:2px;color:#a7b6cc}
.channel h3{font-size:19px;font-weight:800}
.channel p{font-size:14px;color:var(--muted);margin:0;flex:1}
.channel-go{font-size:13.5px;font-weight:700;color:var(--primary);display:inline-flex;align-items:center;gap:6px}
.channel-go::after{content:"›";font-size:17px;line-height:1}

/* ============ topic list ============ */
.topic-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm);height:100%}
.topic-box h3{font-size:17px;font-weight:800;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.topic-box h3 span{width:6px;height:18px;border-radius:3px;background:var(--primary);display:inline-block}
.topic-list li{
  display:flex;align-items:flex-start;gap:12px;padding:11px 0;border-bottom:1px dashed var(--line);
  font-size:14px;color:#3b4d66;
}
.topic-list li:last-child{border-bottom:0;padding-bottom:0}
.topic-list .idx{
  flex:0 0 auto;width:22px;height:22px;border-radius:7px;background:var(--bg-soft);
  color:var(--muted);font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:3px;
}

/* ============ ranking ============ */
.rank-list{display:flex;flex-direction:column;gap:12px}
.rank-item{
  display:grid;grid-template-columns:44px 1fr auto;align-items:center;gap:16px;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 20px;box-shadow:var(--shadow-sm);
  transition:transform .2s,box-shadow .2s,border-color .2s;
}
.rank-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.rank-no{
  width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:15px;background:var(--bg-soft);color:var(--ink-2);
}
.rank-item:first-child .rank-no{background:var(--primary);color:#fff}
.rank-info b{display:block;font-size:15px;font-weight:700}
.rank-info span{font-size:13px;color:var(--muted)}
.rank-score{font-size:13.5px;font-weight:700;color:var(--accent)}

/* ============ news split ============ */
.news-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:24px;align-items:start}
.news-list{display:flex;flex-direction:column;gap:14px}
.news-row{
  display:grid;grid-template-columns:112px 1fr;gap:16px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);padding:12px;
  box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s,border-color .2s;
}
.news-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.news-row img{width:100%;height:82px;object-fit:cover;border-radius:9px}
.news-row h3{font-size:15px;font-weight:700;margin-bottom:5px}
.news-row p{font-size:13px;color:var(--muted);margin:0}
.news-aside{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.news-aside h3{font-size:16px;font-weight:800;margin-bottom:14px}
.aside-item{padding:12px 0;border-bottom:1px dashed var(--line)}
.aside-item:last-child{border-bottom:0;padding-bottom:0}
.aside-item a{font-size:14px;font-weight:600;color:var(--ink-2);display:block}
.aside-item a:hover{color:var(--primary)}
.aside-item span{font-size:12.5px;color:#8c9bb1}
.empty-note{
  background:#fff;border:1px dashed #c9d6ea;border-radius:var(--radius);
  padding:26px;text-align:center;color:var(--muted);font-size:14px;
}

/* ============ timeline ============ */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;position:relative}
.tl-item{position:relative;padding-top:26px}
.tl-item::before{
  content:"";position:absolute;top:6px;left:0;right:-20px;height:2px;background:rgba(255,255,255,.18);
}
.tl-item:last-child::before{right:0}
.tl-dot{
  position:absolute;top:0;left:0;width:13px;height:13px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px rgba(15,184,164,.22);
}
.tl-item b{display:block;font-size:15px;color:#fff;margin-bottom:7px}
.tl-item p{font-size:13.5px;color:#9fb2cd;margin:0;line-height:1.75}

/* ============ compare ============ */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.compare-col{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm);
}
.compare-col.is-best{border-color:#bcd2f9;box-shadow:0 18px 40px rgba(43,98,240,.12)}
.compare-col h3{font-size:17px;font-weight:800;margin-bottom:16px;display:flex;align-items:center;gap:9px}
.compare-col h3 .tag{margin-left:auto}
.compare-col li{
  font-size:14px;color:#3b4d66;padding:10px 0 10px 26px;position:relative;
  border-bottom:1px dashed var(--line);
}
.compare-col li:last-child{border-bottom:0}
.compare-col li::before{
  content:"";position:absolute;left:0;top:19px;width:8px;height:8px;border-radius:50%;
  background:#c3cede;
}
.compare-col.is-best li::before{background:var(--accent)}

/* ============ assurance ============ */
.assure{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.assure-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s;
}
.assure-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.assure-item b{display:block;font-size:15px;margin-bottom:7px}
.assure-item p{font-size:13.5px;color:var(--muted);margin:0}

/* ============ quick answers ============ */
.quick{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.quick-item{
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--primary);
  border-radius:var(--radius-sm);padding:22px;box-shadow:var(--shadow-sm);
}
.quick-item b{display:block;font-size:15px;margin-bottom:8px}
.quick-item p{font-size:13.8px;color:var(--muted);margin:0}

/* ============ faq ============ */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:880px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s,box-shadow .2s;
}
.faq-item[open]{border-color:#c8d8f8;box-shadow:var(--shadow-md)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:19px 24px;font-size:15.5px;font-weight:700;
  display:flex;align-items:center;justify-content:space-between;gap:16px;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:20px;font-weight:400;color:var(--primary);line-height:1;flex:0 0 auto;
  transition:transform .2s;
}
.faq-item[open] summary::after{content:"–";transform:rotate(180deg)}
.faq-item .faq-body{padding:0 24px 22px;font-size:14px;color:var(--muted);line-height:1.82}

/* ============ voices ============ */
.voice{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm);height:100%;
  transition:transform .2s,box-shadow .2s;
}
.voice:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}
.voice p{font-size:14px;color:#3b4d66;line-height:1.8}
.voice-who{display:flex;align-items:center;gap:11px;margin-top:16px}
.voice-avatar{
  width:34px;height:34px;border-radius:50%;background:var(--primary-soft);color:var(--primary-dark);
  font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.voice-who b{font-size:13.5px;display:block}
.voice-who span{font-size:12.5px;color:#8c9bb1}

/* ============ form ============ */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background:#0d1b2a;color:#dbe6f7;padding:48px;
}
.cta-band::before{
  content:"";position:absolute;inset:0;
  background:url('/assets/images/382324f7058e3a8b.webp') center/cover no-repeat;opacity:.2;
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center}
.cta-inner h2{font-size:26px;font-weight:800;color:#fff;margin-bottom:12px}
.cta-inner p{font-size:14.5px;color:#a9bcd6;margin:0}
.cta-form{display:flex;gap:10px;flex-wrap:wrap}
.cta-form input{
  flex:1 1 220px;height:48px;border-radius:var(--radius-sm);border:1px solid rgba(255,255,255,.24);
  background:rgba(255,255,255,.1);color:#fff;padding:0 16px;font-size:14px;outline:none;
}
.cta-form input::placeholder{color:#93a9c6}
.cta-form input:focus{background:rgba(255,255,255,.16);border-color:#7fa3f5;box-shadow:0 0 0 4px rgba(43,98,240,.25)}
.cta-form button{
  height:48px;padding:0 26px;border:0;border-radius:var(--radius-sm);background:var(--primary);
  color:#fff;font-size:15px;font-weight:700;cursor:pointer;transition:background .2s,transform .2s;
}
.cta-form button:hover{background:var(--primary-dark);transform:translateY(-2px)}
.form-note{font-size:13px;color:var(--accent);margin-top:12px;min-height:18px}

/* ============ footer ============ */
.site-footer{background:#0a1522;color:#93a6bf;padding:56px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:800;color:#fff;margin-bottom:14px}
.footer-brand .brand-mark{width:28px;height:28px}
.site-footer p{font-size:13.5px;line-height:1.8;color:#8298b3;margin:0}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-col a{display:block;font-size:13.5px;color:#93a6bf;padding:5px 0}
.footer-col a:hover{color:#fff}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:22px;font-size:12.8px;color:#6c829c;
}
.footer-bottom a{color:#93a6bf}
.footer-bottom a:hover{color:#fff}

/* ============ responsive ============ */
@media (max-width:1100px){
  .hero-copy h1{font-size:34px}
  .hero-grid{gap:36px}
  .board{grid-template-columns:repeat(2,1fr)}
  .grid-4,.assure{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr);row-gap:32px}
  .tl-item::before{right:-20px}
  .news-grid{grid-template-columns:1fr}
}
@media (max-width:991.98px){
  .nav-wrap{height:auto;flex-wrap:wrap;padding:10px 0;gap:10px}
  .nav-search{order:3;flex:1 1 100%;max-width:none;margin-bottom:4px}
  .nav-links{
    order:4;display:none;width:100%;flex-direction:column;align-items:stretch;gap:2px;
    padding:8px 0 4px;border-top:1px solid var(--line);margin-top:4px;
  }
  .site-header.nav-open .nav-links{display:flex}
  .nav-links a{height:42px;padding:0 12px}
  .nav-toggle{display:inline-flex;margin-left:auto}
  .nav-cta{display:none}
  .hero{padding:44px 0 56px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{transform:none;max-width:640px}
  .hero-media::after{inset:16px -14px -14px 18px}
  .hero-media-badge{left:12px;bottom:14px}
  .hero-copy h1{font-size:31px}
  .grid-3,.quick,.grid-2,.compare{grid-template-columns:1fr}
  .section{padding:52px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-band{padding:34px 24px}
  .cta-inner{grid-template-columns:1fr;gap:24px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:520px){
  body{font-size:14.5px}
  .shell{padding:0 16px}
  .hero-copy h1{font-size:26px}
  .hero-lead{font-size:14px}
  .kpi-row{grid-template-columns:1fr}
  .board{grid-template-columns:1fr}
  .grid-4,.assure,.timeline{grid-template-columns:1fr}
  .tl-item::before{display:none}
  .tl-item{padding-top:22px}
  .section-head h2{font-size:22px}
  .btn-solid,.btn-line{width:100%}
  .hero-actions{flex-direction:column}
  .news-row{grid-template-columns:1fr}
  .news-row img{height:150px}
  .rank-item{grid-template-columns:36px 1fr;row-gap:6px}
  .rank-score{grid-column:2}
  .footer-grid{grid-template-columns:1fr}
  .faq-item summary{padding:16px 18px;font-size:14.5px}
  .faq-item .faq-body{padding:0 18px 18px}
}

/* roulang page: article */
:root{
 --ink:#0d1b2a;
 --ink-2:#1c2f49;
 --muted:#64748b;
 --line:#e3e9f3;
 --bg:#f6f8fc;
 --bg-soft:#eef3fb;
 --surface:#ffffff;
 --primary:#2b62f0;
 --primary-dark:#1b47c4;
 --primary-soft:#e8efff;
 --accent:#0fb8a4;
 --accent-soft:#e3f8f5;
 --warn:#d89a2a;
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
 --shadow-md:0 16px 40px rgba(13,27,42,.13);
 --shell:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 font-size:15px;
 line-height:1.78;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
button{font-family:inherit}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 20px}
:focus-visible{outline:3px solid rgba(43,98,240,.35);outline-offset:2px;border-radius:6px}

/* ============ header / nav ============ */
.site-header{
 position:sticky;top:0;z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:0 10px 26px rgba(13,27,42,.09)}
.nav-wrap{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-size:17.5px;font-weight:800;letter-spacing:.2px;white-space:nowrap;color:var(--ink)}
.brand:hover{color:var(--primary)}
.brand-mark{
 width:30px;height:30px;border-radius:9px;flex:0 0 auto;
 background:linear-gradient(140deg,var(--primary),#5b8bff 55%,var(--accent));
 position:relative;box-shadow:0 6px 14px rgba(43,98,240,.28);
}
.brand-mark::after{
 content:"";position:absolute;inset:8px 9px;border-radius:4px;
 border:2px solid rgba(255,255,255,.92);border-bottom-color:transparent;
}
.nav-search{
 flex:1 1 auto;max-width:400px;display:flex;align-items:center;gap:8px;
 height:40px;padding:0 6px 0 14px;
 background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;
 transition:border-color .2s,box-shadow .2s,background .2s;
}
.nav-search:focus-within{background:#fff;border-color:#b9cdf7;box-shadow:0 0 0 4px rgba(43,98,240,.12)}
.nav-search svg{flex:0 0 auto;color:#8a9ab4}
.nav-search input{
 flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
 font-size:14px;color:var(--ink);outline:none;
}
.nav-search input::placeholder{color:#94a3b8}
.nav-search button{
 flex:0 0 auto;height:30px;padding:0 15px;border:0;border-radius:999px;
 background:var(--primary);color:#fff;font-size:13px;font-weight:600;cursor:pointer;
 transition:background .2s,transform .2s;
}
.nav-search button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
 display:inline-flex;align-items:center;height:36px;padding:0 12px;
 font-size:14.5px;font-weight:600;color:var(--ink-2);border-radius:9px;white-space:nowrap;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--primary)}
.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-cta{
 display:inline-flex;align-items:center;height:38px;padding:0 18px;
 border-radius:9px;background:var(--ink);color:#fff;font-size:14px;font-weight:600;
 white-space:nowrap;transition:background .2s,transform .2s,box-shadow .2s;
}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(43,98,240,.3)}
.nav-toggle{
 display:none;align-items:center;justify-content:center;width:42px;height:38px;
 border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;color:var(--ink-2);
}

/* ============ buttons / tags ============ */
.btn-solid,.btn-ghost,.btn-line{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 height:46px;padding:0 24px;border-radius:var(--radius-sm);
 font-size:15px;font-weight:700;cursor:pointer;border:1px solid transparent;
 transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn-solid{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(43,98,240,.28)}
.btn-solid:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,98,240,.34)}
.btn-line{background:#fff;color:var(--ink);border-color:#cfd9ea}
.btn-line:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#fff;transform:translateY(-2px)}
.btn-sm{height:40px;padding:0 18px;font-size:14px}
.tag{
 display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
 font-size:12.5px;font-weight:600;background:var(--primary-soft);color:var(--primary-dark);
}
.tag--accent{background:var(--accent-soft);color:#0a7f72}
.tag--line{background:#fff;border:1px solid var(--line);color:var(--muted)}

/* ============ article hero ============ */
.article-hero{
 position:relative;overflow:hidden;padding:44px 0 40px;
 background:linear-gradient(180deg,#eef4ff 0%,#f6f8fc 92%);
 border-bottom:1px solid var(--line);
}
.article-hero-bg{
 position:absolute;inset:0;background:url('/assets/images/dda77d4ad5f497af.webp') center/cover no-repeat;
 opacity:.07;pointer-events:none;
}
.article-hero-inner{position:relative;max-width:820px}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-bottom:18px}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--primary)}
.crumb span.sep{color:#b7c3d6}
.eyebrow{
 display:inline-flex;align-items:center;gap:7px;height:28px;padding:0 13px;border-radius:999px;
 background:#fff;border:1px solid #d8e3f8;color:var(--primary-dark);
 font-size:12.5px;font-weight:700;letter-spacing:.3px;margin-bottom:16px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent)}
.article-title{
 font-size:clamp(26px,3.6vw,40px);line-height:1.32;font-weight:800;letter-spacing:-.4px;
 color:var(--ink);margin:0 0 16px;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;font-size:13.5px;color:var(--muted);margin-bottom:18px}
.article-meta strong{color:var(--ink-2);font-weight:700}
.meta-dot{width:4px;height:4px;border-radius:50%;background:#c2cee0;display:inline-block}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px}

/* ============ layout ============ */
.section{padding:64px 0}
.section--soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--tight{padding:48px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:30px}
.section-head h2{
 position:relative;font-size:clamp(21px,2.4vw,27px);font-weight:800;letter-spacing:-.3px;
 margin:0;padding-left:16px;color:var(--ink);
}
.section-head h2::before{
 content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:3px;
 background:linear-gradient(180deg,var(--primary),var(--accent));
}
.section-head p{margin:0;color:var(--muted);font-size:14px;max-width:560px;line-height:1.75}

.article-layout{
 display:grid;grid-template-columns:minmax(0,720px) 320px;
 gap:44px;justify-content:center;align-items:start;
}
.article-panel{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:34px 36px;box-shadow:var(--shadow-sm);
}
.article-body{font-size:15.5px;line-height:1.86;color:#33465f;word-break:break-word}
.article-body h2{font-size:22px;font-weight:800;color:var(--ink);margin:34px 0 12px;line-height:1.45}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:18px;font-weight:800;color:var(--ink-2);margin:26px 0 10px;line-height:1.5}
.article-body h4{font-size:16px;font-weight:700;color:var(--ink-2);margin:22px 0 8px}
.article-body p{margin:0 0 16px}
.article-body ul,.article-body ol{padding-left:22px;margin:0 0 18px}
.article-body li{margin-bottom:8px}
.article-body strong{color:var(--ink);font-weight:700}
.article-body a{color:var(--primary);border-bottom:1px solid rgba(43,98,240,.32)}
.article-body a:hover{border-bottom-color:var(--primary)}
.article-body img{border-radius:var(--radius);margin:22px 0;box-shadow:var(--shadow-sm);width:100%;height:auto}
.article-body blockquote{
 margin:22px 0;padding:14px 20px;background:var(--primary-soft);
 border-left:3px solid var(--primary);border-radius:0 12px 12px 0;color:#2b4568;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 13px;text-align:left;vertical-align:top}
.article-body th{background:var(--bg-soft);font-weight:700;color:var(--ink-2)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.article-empty{
 text-align:center;padding:22px 0 8px;
}
.article-empty h2{font-size:22px;font-weight:800;margin-bottom:10px;color:var(--ink)}
.article-empty p{color:var(--muted);margin-bottom:22px}

/* ============ sidebar ============ */
.side-col{display:flex;flex-direction:column;gap:20px;position:sticky;top:88px}
.side-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);
}
.side-card h3{
 font-size:15px;font-weight:800;margin:0 0 14px;color:var(--ink);
 display:flex;align-items:center;gap:8px;
}
.side-card h3::before{content:"";width:3px;height:14px;border-radius:2px;background:var(--accent)}
.side-link{
 display:flex;align-items:center;justify-content:space-between;gap:10px;
 padding:9px 0;font-size:14px;font-weight:600;color:var(--ink-2);
 border-bottom:1px dashed var(--line);
}
.side-link:last-child{border-bottom:0}
.side-link:hover{color:var(--primary)}
.side-link span{font-size:12px;font-weight:600;color:#9aabc3}
.side-list{list-style:none;padding:0;margin:0}
.side-list li{margin-bottom:2px}
.side-list a{
 display:flex;gap:9px;align-items:flex-start;padding:8px 0;font-size:14px;color:var(--ink-2);font-weight:600;
}
.side-list a:hover{color:var(--primary)}
.side-list b{color:var(--primary);font-weight:800;flex:0 0 auto}
.side-note{
 background:linear-gradient(160deg,#12253f,#1b3c66);
 color:#d7e4f7;border:0;
}
.side-note h3{color:#fff}
.side-note h3::before{background:var(--accent)}
.side-note p{font-size:13.5px;line-height:1.8;margin:0}
.side-card img{border-radius:10px;margin-bottom:14px;aspect-ratio:16/10;object-fit:cover;width:100%}

/* ============ metrics ============ */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.metric-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:20px 20px 18px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.metric-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfdcf4}
.metric-label{font-size:12.5px;font-weight:700;color:var(--muted);letter-spacing:.2px;margin-bottom:8px}
.metric-value{font-size:28px;font-weight:800;color:var(--ink);line-height:1.2;letter-spacing:-.5px}
.metric-value small{font-size:14px;font-weight:700;color:var(--muted);margin-left:3px}
.metric-desc{font-size:13px;color:var(--muted);line-height:1.7;margin:10px 0 0}
.metric-bar{height:6px;border-radius:999px;background:var(--bg-soft);margin-top:12px;overflow:hidden}
.metric-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--primary),var(--accent))}

/* ============ spec matrix ============ */
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.spec-card{
 display:flex;gap:16px;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.spec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfdcf4}
.spec-icon{
 flex:0 0 auto;width:44px;height:44px;border-radius:12px;display:flex;align-items:center;justify-content:center;
 background:var(--primary-soft);color:var(--primary);
}
.spec-card h3{font-size:16px;font-weight:800;margin:0 0 6px;color:var(--ink)}
.spec-card p{font-size:13.8px;color:#55677f;line-height:1.75;margin:0}
.spec-card .tag{margin-top:10px}

/* ============ compare table ============ */
.compare-wrap{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);
 overflow:hidden;box-shadow:var(--shadow-sm);
}
.compare-table{width:100%;border-collapse:collapse;font-size:14.5px}
.compare-table thead th{
 background:var(--ink);color:#eaf1fb;font-weight:700;font-size:13.5px;
 padding:14px 18px;text-align:left;letter-spacing:.3px;
}
.compare-table td{padding:14px 18px;border-bottom:1px solid var(--line);color:#33465f;vertical-align:top}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody tr:hover{background:#f8fbff}
.compare-table b{color:var(--ink);font-weight:800}
.pill{
 display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;
 font-size:12px;font-weight:700;background:var(--accent-soft);color:#0a7f72;
}
.pill--warn{background:#fdf3e0;color:#9a6a10}

/* ============ timeline ============ */
.timeline-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center}
.timeline{position:relative;padding-left:26px}
.timeline::before{
 content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;
 background:linear-gradient(180deg,var(--primary),var(--accent));opacity:.35;border-radius:2px;
}
.timeline-item{position:relative;padding:0 0 24px 0}
.timeline-item:last-child{padding-bottom:0}
.timeline-item::before{
 content:"";position:absolute;left:-26px;top:6px;width:14px;height:14px;border-radius:50%;
 background:#fff;border:3px solid var(--primary);box-shadow:0 0 0 4px rgba(43,98,240,.1);
}
.timeline-item h3{font-size:15.5px;font-weight:800;margin:0 0 5px;color:var(--ink)}
.timeline-item h3 em{font-style:normal;color:var(--primary);margin-right:8px;font-weight:800}
.timeline-item p{font-size:13.8px;color:#55677f;margin:0;line-height:1.75}
.timeline-media{border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.timeline-media img{width:100%;aspect-ratio:4/3;object-fit:cover}

/* ============ channels ============ */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.channel-card{
 display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#cfdcf4}
.channel-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.channel-body{padding:18px 20px 20px}
.channel-body h3{font-size:16.5px;font-weight:800;margin:0 0 8px;color:var(--ink)}
.channel-body p{font-size:13.6px;color:#55677f;line-height:1.75;margin:0 0 14px}
.channel-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;color:var(--primary)}
.channel-link:hover{gap:10px}

/* ============ quick answer ============ */
.quick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.quick-item{
 display:flex;gap:14px;background:var(--surface);border:1px solid var(--line);
 border-radius:var(--radius);padding:18px 20px;box-shadow:var(--shadow-sm);
 transition:border-color .2s,transform .2s,box-shadow .2s;
}
.quick-item:hover{border-color:#cfdcf4;transform:translateY(-3px);box-shadow:var(--shadow-md)}
.quick-num{
 flex:0 0 auto;width:30px;height:30px;border-radius:9px;background:var(--ink);color:#fff;
 display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;
}
.quick-item h3{font-size:15px;font-weight:800;margin:0 0 5px;color:var(--ink)}
.quick-item p{font-size:13.6px;color:#55677f;margin:0;line-height:1.75}

/* ============ faq ============ */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:0 22px;box-shadow:var(--shadow-sm);transition:border-color .2s,box-shadow .2s;
}
.faq-item[open]{border-color:#c8d9f7;box-shadow:0 12px 28px rgba(13,27,42,.08)}
.faq-item summary{
 list-style:none;cursor:pointer;padding:17px 0;font-size:15.5px;font-weight:700;color:var(--ink);
 display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:"";flex:0 0 auto;width:9px;height:9px;border-right:2px solid var(--primary);
 border-bottom:2px solid var(--primary);transform:rotate(45deg);transition:transform .2s;
 margin-right:2px;
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-item .faq-body{padding:0 0 18px;font-size:14.3px;color:#55677f;line-height:1.85}

/* ============ subscribe ============ */
.subscribe{
 position:relative;overflow:hidden;border-radius:var(--radius-lg);
 background:linear-gradient(135deg,#0d1b2a,#1b3c66 60%,#1b47c4);
 padding:44px;color:#fff;box-shadow:var(--shadow-md);
}
.subscribe::after{
 content:"";position:absolute;right:-70px;top:-70px;width:250px;height:250px;border-radius:50%;
 background:radial-gradient(circle,rgba(15,184,164,.42),transparent 68%);
}
.subscribe-inner{position:relative;display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:center}
.subscribe h2{font-size:clamp(21px,2.5vw,27px);font-weight:800;margin:0 0 10px;color:#fff;letter-spacing:-.3px}
.subscribe p{font-size:14.3px;color:#c6d7ee;margin:0;line-height:1.8}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap}
.subscribe-form input{
 flex:1 1 190px;height:46px;padding:0 16px;border-radius:var(--radius-sm);
 border:1px solid rgba(255,255,255,.24);background:rgba(255,255,255,.1);
 color:#fff;font-size:14.5px;outline:none;transition:border-color .2s,background .2s;
}
.subscribe-form input::placeholder{color:#a9c0dc}
.subscribe-form input:focus{border-color:rgba(255,255,255,.6);background:rgba(255,255,255,.16)}
.subscribe-form button{
 flex:0 0 auto;height:46px;padding:0 24px;border:0;border-radius:var(--radius-sm);
 background:var(--accent);color:#05241f;font-size:15px;font-weight:800;cursor:pointer;
 transition:transform .2s,box-shadow .2s,background .2s;
}
.subscribe-form button:hover{background:#13d2bb;transform:translateY(-2px);box-shadow:0 12px 26px rgba(15,184,164,.35)}
.form-hint{font-size:12.5px;color:#9eb6d3;margin-top:10px}

/* ============ footer ============ */
.site-footer{background:#0b1624;color:#a9bcd4;padding:54px 0 0;margin-top:0}
.footer-grid{
 display:grid;grid-template-columns:1.6fr 1fr 1fr 1.3fr;gap:34px;
 padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:800;color:#fff;margin-bottom:14px}
.site-footer p{font-size:13.6px;line-height:1.85;color:#93a8c1;margin:0}
.footer-col h4{font-size:14px;font-weight:800;color:#fff;margin:0 0 14px}
.footer-col a{display:block;font-size:13.8px;color:#9db2cb;padding:5px 0}
.footer-col a:hover{color:#fff}
.footer-bottom{
 display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
 padding:20px 0;font-size:13px;color:#7e93ad;
}

/* ============ responsive ============ */
@media (max-width:1024px){
 .nav-search{max-width:300px}
 .article-layout{grid-template-columns:minmax(0,1fr);gap:32px}
 .side-col{position:static;flex-direction:row;flex-wrap:wrap}
 .side-card{flex:1 1 260px}
 .metric-grid{grid-template-columns:repeat(2,1fr)}
 .channel-grid{grid-template-columns:repeat(2,1fr)}
 .timeline-grid{grid-template-columns:1fr}
 .timeline-media{order:-1}
 .subscribe-inner{grid-template-columns:1fr}
 .footer-grid{grid-template-columns:1.4fr 1fr 1fr}
}
@media (max-width:900px){
 .nav-search{display:none}
}
@media (max-width:768px){
 .nav-wrap{height:60px;gap:10px}
 .nav-links{
  display:none;position:absolute;left:0;right:0;top:100%;
  flex-direction:column;align-items:stretch;gap:4px;
  background:#fff;border-bottom:1px solid var(--line);
  padding:12px 20px 18px;box-shadow:0 18px 32px rgba(13,27,42,.1);
 }
 .site-header.nav-open .nav-links{display:flex}
 .nav-links a{height:44px;padding:0 14px;font-size:15px}
 .nav-toggle{display:inline-flex;margin-left:auto}
 .nav-cta{display:none}
 .article-panel{padding:24px 20px}
 .article-hero{padding:32px 0 30px}
 .section{padding:46px 0}
 .spec-grid,.quick-grid,.channel-grid{grid-template-columns:1fr}
 .subscribe{padding:30px 22px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:520px){
 .shell{padding:0 16px}
 .metric-grid{grid-template-columns:1fr}
 .metric-value{font-size:25px}
 .side-col{flex-direction:column}
 .footer-grid{grid-template-columns:1fr}
 .footer-bottom{flex-direction:column}
 .btn-solid,.btn-line,.btn-ghost{width:100%}
 .hero-tags .tag{font-size:12px}
 .article-title{font-size:25px}
 .compare-table{font-size:13.5px}
 .compare-table thead th,.compare-table td{padding:11px 12px}
}

/* roulang page: category1 */
:root{
 --ink:#0d1b2a;
 --ink-2:#1c2f49;
 --muted:#64748b;
 --line:#e3e9f3;
 --bg:#f6f8fc;
 --bg-soft:#eef3fb;
 --surface:#ffffff;
 --primary:#2b62f0;
 --primary-dark:#1b47c4;
 --primary-soft:#e8efff;
 --accent:#0fb8a4;
 --accent-soft:#e3f8f5;
 --warn:#d89a2a;
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
 --shadow-md:0 16px 40px rgba(13,27,42,.13);
 --shell:1160px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 font-size:15px;
 line-height:1.78;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:800;line-height:1.3;color:var(--ink)}
p{margin:0 0 12px}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,transform .2s ease}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:3px solid rgba(43,98,240,.45);outline-offset:2px}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 20px}

/* ============ header / nav ============ */
.site-header{
 position:sticky;top:0;z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:0 10px 26px rgba(13,27,42,.09)}
.nav-wrap{position:relative;display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-size:17.5px;font-weight:800;letter-spacing:.2px;white-space:nowrap;color:var(--ink)}
.brand:hover{color:var(--primary)}
.brand-mark{
 width:30px;height:30px;border-radius:9px;flex:0 0 auto;
 background:linear-gradient(140deg,var(--primary),#5b8bff 55%,var(--accent));
 position:relative;box-shadow:0 6px 14px rgba(43,98,240,.28);
}
.brand-mark::after{
 content:"";position:absolute;inset:8px 9px;border-radius:4px;
 border:2px solid rgba(255,255,255,.92);border-bottom-color:transparent;
}
.nav-search{
 flex:1 1 auto;max-width:400px;display:flex;align-items:center;gap:8px;
 height:40px;padding:0 6px 0 14px;
 background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;
 transition:border-color .2s,box-shadow .2s,background .2s;
}
.nav-search:focus-within{background:#fff;border-color:#b9cdf7;box-shadow:0 0 0 4px rgba(43,98,240,.12)}
.nav-search svg{flex:0 0 auto;color:#8a9ab4}
.nav-search input{
 flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
 font-size:14px;color:var(--ink);outline:none;
}
.nav-search input::placeholder{color:#94a3b8}
.nav-search button{
 flex:0 0 auto;height:30px;padding:0 15px;border:0;border-radius:999px;
 background:var(--primary);color:#fff;font-size:13px;font-weight:600;cursor:pointer;
 transition:background .2s,transform .2s;
}
.nav-search button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
 display:inline-flex;align-items:center;height:36px;padding:0 12px;
 font-size:14.5px;font-weight:600;color:var(--ink-2);border-radius:9px;white-space:nowrap;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--primary)}
.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-cta{
 display:inline-flex;align-items:center;height:38px;padding:0 18px;
 border-radius:9px;background:var(--ink);color:#fff;font-size:14px;font-weight:600;
 white-space:nowrap;transition:background .2s,transform .2s,box-shadow .2s;
}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(43,98,240,.3)}
.nav-toggle{
 display:none;align-items:center;justify-content:center;width:42px;height:38px;
 border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;color:var(--ink-2);
}

/* ============ buttons / tags ============ */
.btn-solid,.btn-line{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 height:46px;padding:0 24px;border-radius:var(--radius-sm);
 font-size:15px;font-weight:700;cursor:pointer;border:1px solid transparent;
 transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn-solid{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(43,98,240,.28)}
.btn-solid:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,98,240,.34)}
.btn-line{background:#fff;color:var(--ink);border-color:#cfd9ea}
.btn-line:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.tag{
 display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
 font-size:12.5px;font-weight:600;background:var(--primary-soft);color:var(--primary-dark);
}
.tag--accent{background:var(--accent-soft);color:#0a7f72}
.tag--line{background:#fff;border:1px solid var(--line);color:var(--muted)}

/* ============ hero ============ */
.hero{position:relative;overflow:hidden;padding:56px 0 100px;background:linear-gradient(180deg,#eef4ff 0%,#f6f8fc 82%)}
.hero-bg{
 position:absolute;inset:0;background:url('/assets/images/856ff868ea17f14f.webp') center/cover no-repeat;
 opacity:.08;pointer-events:none;
}
.hero-inner{position:relative;max-width:1000px}
.hero-eyebrow{
 display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;
 background:#fff;border:1px solid #d5e2ff;color:var(--primary-dark);
 font-size:13px;font-weight:700;margin-bottom:18px;
}
.hero h1{font-size:38px;letter-spacing:-.6px;margin-bottom:16px;max-width:860px}
.hero-lead{font-size:15.5px;color:#41546e;line-height:1.85;max-width:820px;margin-bottom:24px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px}
.compare{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:34px}
.compare-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
 padding:24px 24px 18px;box-shadow:var(--shadow-sm);position:relative;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.compare-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d8f5}
.compare-card--after{border-color:#bcd7ff;background:linear-gradient(180deg,#f7fbff,#fff)}
.compare-label{
 display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:700;
 padding:4px 11px;border-radius:999px;margin-bottom:14px;background:#f1f4fa;color:var(--muted);
}
.compare-card--after .compare-label{background:var(--primary-soft);color:var(--primary-dark)}
.compare-card h3{font-size:17.5px;margin-bottom:12px}
.compare-list li{position:relative;padding-left:22px;font-size:14.5px;color:#42566f;line-height:1.75;margin-bottom:10px}
.compare-list li:last-child{margin-bottom:0}
.compare-list li::before{
 content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:#cdd8e9;
}
.compare-card--after .compare-list li::before{background:var(--accent)}

/* ============ metrics ============ */
.metrics-band{position:relative;z-index:5;margin-top:-54px;padding:0 0 10px}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.metric{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:20px 20px 18px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.metric:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d8f5}
.metric-num{display:block;font-size:26px;font-weight:800;letter-spacing:-.5px;color:var(--ink);margin-bottom:2px}
.metric-num span{font-size:14px;font-weight:700;color:var(--primary);margin-left:3px;letter-spacing:0}
.metric-label{display:block;font-size:14px;font-weight:700;color:var(--ink-2);margin-bottom:4px}
.metric-note{font-size:12.5px;color:var(--muted);line-height:1.6;margin:0}

/* ============ sections ============ */
.section{padding:66px 0}
.section--soft{background:var(--bg-soft)}
.section--white{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{margin-bottom:34px;max-width:780px}
.kicker{
 display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:800;
 letter-spacing:.16em;color:var(--primary);margin-bottom:10px;
}
.kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--primary)}
.section-head h2{font-size:27px;letter-spacing:-.3px;margin-bottom:10px}
.section-head p{color:var(--muted);font-size:14.5px;margin:0}

/* ============ module cards ============ */
.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.module-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:24px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;gap:12px;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.module-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d8f5}
.module-icon{
 width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
 background:var(--primary-soft);color:var(--primary-dark);flex:0 0 auto;
}
.module-card h3{font-size:17px}
.module-card p{font-size:14px;color:#4a5d76;margin:0;line-height:1.72}
.module-meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:8px;padding-top:6px}

/* ============ compare table ============ */
.table-wrap{
 overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);
 background:#fff;box-shadow:var(--shadow-sm);
}
.cmp-table{width:100%;border-collapse:collapse;min-width:660px}
.cmp-table th,.cmp-table td{
 padding:15px 18px;text-align:left;font-size:14px;border-bottom:1px solid var(--line);vertical-align:top;
}
.cmp-table thead th{background:#f2f6fd;font-size:13px;font-weight:800;color:var(--ink-2);letter-spacing:.03em}
.cmp-table tbody tr:last-child td{border-bottom:0}
.cmp-table tbody tr:hover{background:#f8fbff}
.cmp-table td:first-child{font-weight:700;color:var(--ink-2)}
.cell-bad{color:#a5761a}
.cell-good{color:#0a7f72;font-weight:600}

/* ============ timeline ============ */
.timeline{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tl-item{
 position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tl-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d8f5}
.tl-item::after{
 content:"";position:absolute;top:36px;right:-18px;width:18px;height:1px;background:var(--line);
}
.tl-item:last-child::after{display:none}
.tl-step{font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--primary);margin-bottom:8px}
.tl-item h3{font-size:16px;margin-bottom:8px}
.tl-item p{font-size:13.8px;color:#4a5d76;margin:0;line-height:1.72}

/* ============ checklist ============ */
.check-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center}
.check-figure{position:relative;margin:0;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md)}
.check-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.check-figure figcaption{
 position:absolute;left:0;right:0;bottom:0;padding:18px;font-size:13px;font-weight:600;color:#fff;
 background:linear-gradient(180deg,rgba(9,20,34,0),rgba(9,20,34,.84));
}
.check-list li{display:flex;gap:12px;padding:14px 0;border-bottom:1px dashed var(--line)}
.check-list li:last-child{border-bottom:0}
.check-dot{
 flex:0 0 auto;width:26px;height:26px;border-radius:8px;display:grid;place-items:center;
 background:var(--accent-soft);color:#0a7f72;font-size:12px;font-weight:800;margin-top:3px;
}
.check-list b{display:block;font-size:14.5px;color:var(--ink);margin-bottom:2px}
.check-list span{font-size:13.8px;color:var(--muted);line-height:1.7}

/* ============ changelog ============ */
.log-list{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 overflow:hidden;box-shadow:var(--shadow-sm);
}
.log-item{
 display:grid;grid-template-columns:120px 1fr auto;gap:18px;align-items:center;
 padding:18px 22px;border-bottom:1px solid var(--line);
 transition:background .2s ease;
}
.log-item:last-child{border-bottom:0}
.log-item:hover{background:#f8fbff}
.log-date{font-size:13px;font-weight:800;color:var(--primary-dark)}
.log-item h3{font-size:15px;margin-bottom:3px}
.log-item p{font-size:13.6px;color:var(--muted);margin:0;line-height:1.7}

/* ============ trust ============ */
.trust-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.trust-card{
 display:flex;gap:14px;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.trust-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c9d8f5}
.trust-icon{
 width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
 background:var(--bg-soft);color:var(--primary);flex:0 0 auto;
}
.trust-card h3{font-size:15.5px;margin-bottom:6px}
.trust-card p{font-size:13.8px;color:#4a5d76;margin:0;line-height:1.72}

/* ============ faq ============ */
.faq-wrap{max-width:880px}
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 margin-bottom:12px;padding:0 22px;box-shadow:var(--shadow-sm);
 transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#c9d8f5;box-shadow:var(--shadow-md)}
.faq-item summary{
 list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;
 gap:16px;padding:17px 0;font-size:15.5px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:"";width:11px;height:11px;flex:0 0 auto;margin-right:3px;
 border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
 transform:rotate(45deg);transition:transform .2s ease,border-color .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--primary)}
.faq-body{padding:0 0 18px;font-size:14.2px;color:#4a5d76;line-height:1.82;margin:0}

/* ============ subscribe ============ */
.subscribe{
 position:relative;overflow:hidden;border-radius:var(--radius-lg);padding:40px;
 display:grid;grid-template-columns:1.05fr .95fr;gap:32px;align-items:center;
 background:linear-gradient(135deg,#12233c,#0d1b2a 58%,#153253);
 color:#e7eefb;box-shadow:var(--shadow-md);
}
.subscribe::after{
 content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
 background:radial-gradient(circle,rgba(43,98,240,.55),transparent 70%);pointer-events:none;
}
.subscribe h2{color:#fff;font-size:25px;margin-bottom:10px;letter-spacing:-.3px}
.subscribe p{color:#a9bdd8;font-size:14.2px;margin:0;line-height:1.78}
.subscribe-side{position:relative;z-index:2}
.subscribe-form{display:flex;gap:10px;flex-wrap:wrap}
.subscribe-form input{
 flex:1 1 220px;height:48px;border-radius:10px;border:1px solid rgba(255,255,255,.2);
 background:rgba(255,255,255,.09);color:#fff;padding:0 16px;font-size:14.5px;outline:none;
 transition:border-color .2s,box-shadow .2s,background .2s;
}
.subscribe-form input::placeholder{color:#8ea3bf}
.subscribe-form input:focus{background:rgba(255,255,255,.14);border-color:#6d9bff;box-shadow:0 0 0 4px rgba(109,155,255,.18)}
.subscribe-form button{
 height:48px;padding:0 24px;border-radius:10px;border:0;cursor:pointer;
 background:var(--primary);color:#fff;font-size:15px;font-weight:700;
 transition:background .2s,transform .2s,box-shadow .2s;
}
.subscribe-form button:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 24px rgba(43,98,240,.4)}
.subscribe-note{margin:12px 0 0;font-size:12.5px;color:#8ea3bf;line-height:1.7}

/* ============ footer ============ */
.site-footer{background:#0d1b2a;color:#a8b7cc;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:34px}
.footer-brand{
 display:flex;align-items:center;gap:9px;color:#fff;font-weight:800;
 font-size:17px;margin-bottom:14px;letter-spacing:.2px;
}
.footer-col h4{color:#fff;font-size:14px;font-weight:800;margin-bottom:14px;letter-spacing:.04em}
.footer-col a{display:block;font-size:14px;padding:5px 0;color:#a8b7cc}
.footer-col a:hover{color:#fff}
.footer-col p{font-size:13.5px;line-height:1.8;margin:0;color:#93a6bd}
.site-footer .footer-brand p{font-size:13.8px;line-height:1.82;color:#93a6bd;margin:0}
.footer-bottom{
 display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;
 border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px;
 font-size:13px;color:#7f90a8;
}

/* ============ responsive ============ */
@media (max-width:1024px){
 .nav-search{max-width:250px}
 .hero h1{font-size:33px}
 .module-grid{grid-template-columns:repeat(2,1fr)}
 .metrics{grid-template-columns:repeat(2,1fr)}
 .timeline{grid-template-columns:repeat(2,1fr)}
 .tl-item::after{display:none}
 .check-grid{grid-template-columns:1fr;gap:28px}
 .trust-grid{grid-template-columns:1fr}
 .subscribe{grid-template-columns:1fr;padding:34px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:900px){
 .nav-toggle{display:inline-flex;margin-left:auto}
 .nav-search{display:none}
 .nav-cta{display:none}
 .nav-links{
  position:absolute;top:64px;left:0;right:0;z-index:210;
  display:none;flex-direction:column;align-items:stretch;gap:4px;
  background:#fff;border-bottom:1px solid var(--line);
  padding:10px 20px 16px;margin:0;
  box-shadow:0 18px 30px rgba(13,27,42,.1);
 }
 .nav-links.is-open{display:flex}
 .nav-links a{height:44px;padding:0 12px;font-size:15px}
}
@media (max-width:768px){
 .section{padding:48px 0}
 .hero{padding:40px 0 80px}
 .hero h1{font-size:28px}
 .hero-lead{font-size:14.8px}
 .compare{grid-template-columns:1fr;margin-top:28px}
 .metrics-band{margin-top:-44px}
 .module-grid{grid-template-columns:1fr}
 .timeline{grid-template-columns:1fr}
 .log-item{grid-template-columns:1fr;gap:6px;padding:16px 18px}
 .section-head h2{font-size:23px}
 .subscribe{padding:26px}
 .subscribe h2{font-size:22px}
}
@media (max-width:520px){
 .metrics{grid-template-columns:1fr}
 .hero h1{font-size:25px}
 .btn-solid,.btn-line{height:44px;padding:0 18px;font-size:14px}
 .hero-eyebrow{font-size:12.5px}
 .footer-bottom{flex-direction:column;gap:6px}
 .cmp-table th,.cmp-table td{padding:13px 14px;font-size:13.5px}
}

/* roulang page: category2 */
:root{
 --ink:#0d1b2a;
 --ink-2:#1c2f49;
 --muted:#64748b;
 --line:#e3e9f3;
 --bg:#f6f8fc;
 --bg-soft:#eef3fb;
 --surface:#ffffff;
 --primary:#2b62f0;
 --primary-dark:#1b47c4;
 --primary-soft:#e8efff;
 --accent:#0fb8a4;
 --accent-soft:#e3f8f5;
 --warn:#d89a2a;
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
 --shadow-md:0 16px 40px rgba(13,27,42,.13);
 --shell:1160px;
}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 font-size:15px;
 line-height:1.78;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
button{font-family:inherit}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 20px}

/* ============ header / nav ============ */
.site-header{
 position:sticky;top:0;z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:0 10px 26px rgba(13,27,42,.09)}
.nav-wrap{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-size:17.5px;font-weight:800;letter-spacing:.2px;white-space:nowrap;color:var(--ink)}
.brand:hover{color:var(--primary)}
.brand-mark{
 width:30px;height:30px;border-radius:9px;flex:0 0 auto;
 background:linear-gradient(140deg,var(--primary),#5b8bff 55%,var(--accent));
 position:relative;box-shadow:0 6px 14px rgba(43,98,240,.28);
}
.brand-mark::after{
 content:"";position:absolute;inset:8px 9px;border-radius:4px;
 border:2px solid rgba(255,255,255,.92);border-bottom-color:transparent;
}
.nav-search{
 flex:1 1 auto;max-width:400px;display:flex;align-items:center;gap:8px;
 height:40px;padding:0 6px 0 14px;
 background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;
 transition:border-color .2s,box-shadow .2s,background .2s;
}
.nav-search:focus-within{background:#fff;border-color:#b9cdf7;box-shadow:0 0 0 4px rgba(43,98,240,.12)}
.nav-search svg{flex:0 0 auto;color:#8a9ab4}
.nav-search input{
 flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
 font-size:14px;color:var(--ink);outline:none;
}
.nav-search input::placeholder{color:#94a3b8}
.nav-search button{
 flex:0 0 auto;height:30px;padding:0 15px;border:0;border-radius:999px;
 background:var(--primary);color:#fff;font-size:13px;font-weight:600;cursor:pointer;
 transition:background .2s,transform .2s;
}
.nav-search button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
 display:inline-flex;align-items:center;height:36px;padding:0 12px;
 font-size:14.5px;font-weight:600;color:var(--ink-2);border-radius:9px;white-space:nowrap;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--primary)}
.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-cta{
 display:inline-flex;align-items:center;height:38px;padding:0 18px;
 border-radius:9px;background:var(--ink);color:#fff;font-size:14px;font-weight:600;
 white-space:nowrap;transition:background .2s,transform .2s,box-shadow .2s;
}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(43,98,240,.3)}
.nav-toggle{
 display:none;align-items:center;justify-content:center;width:42px;height:38px;
 border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;color:var(--ink-2);
}

/* ============ buttons / tags ============ */
.btn-solid,.btn-line,.btn-ghost{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 height:46px;padding:0 24px;border-radius:var(--radius-sm);
 font-size:15px;font-weight:700;cursor:pointer;border:1px solid transparent;
 transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn-solid{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(43,98,240,.28)}
.btn-solid:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,98,240,.34)}
.btn-line{background:#fff;color:var(--ink);border-color:#cfd9ea}
.btn-line:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.tag{
 display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
 font-size:12.5px;font-weight:600;background:var(--primary-soft);color:var(--primary-dark);
}
.tag--accent{background:var(--accent-soft);color:#0a7f72}
.tag--line{background:#fff;border:1px solid var(--line);color:var(--muted)}

/* ============ 分类 Hero ============ */
.cat-hero{
 position:relative;overflow:hidden;padding:36px 0 42px;
 background:linear-gradient(100deg,#eef4ff 0%,#f6f8fc 58%,#eaf7f4 100%);
 border-bottom:1px solid var(--line);
}
.cat-hero::before{
 content:"";position:absolute;inset:0;
 background:url('/assets/images/6f077a7f789af1e0.webp') center/cover no-repeat;
 opacity:.06;pointer-events:none;
}
.cat-hero .shell{position:relative;z-index:1}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--muted);margin-bottom:16px}
.crumb span{color:#b6c2d4}
.hero-inner{display:grid;grid-template-columns:1.42fr .9fr;gap:44px;align-items:center}
.hero-copy h1{font-size:33px;line-height:1.32;font-weight:800;letter-spacing:-.4px;margin:0 0 14px}
.hero-copy h1 em{font-style:normal;color:var(--primary)}
.hero-lead{font-size:14.8px;color:#40536e;line-height:1.85;margin:0 0 18px;max-width:640px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-figure{position:relative}
.hero-figure img{
 width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius);
 box-shadow:var(--shadow-md);border:4px solid #fff;
}
.hero-figure figcaption{
 margin-top:12px;font-size:12.5px;color:var(--muted);text-align:center;
}

/* ============ 通用板块 ============ */
main{display:block}
.section{padding:62px 0}
.section--soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--dark{background:var(--ink);color:#dfe8f5}
.section-head{max-width:760px;margin-bottom:32px}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
 letter-spacing:1.2px;color:var(--primary);text-transform:none;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--accent)}
.section-title{font-size:26px;font-weight:800;letter-spacing:-.3px;margin:10px 0 10px;line-height:1.4}
.section-desc{font-size:14.5px;color:var(--muted);margin:0}
.section--dark .section-desc{color:#a8bad2}

/* 指标看板 */
.metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.metric-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:22px 20px;box-shadow:var(--shadow-sm);
 transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.metric-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.metric-value{font-size:30px;font-weight:800;letter-spacing:-.5px;color:var(--ink);line-height:1.2}
.metric-value small{font-size:15px;font-weight:700;color:var(--muted);margin-left:2px}
.metric-name{font-size:13.5px;font-weight:700;color:var(--ink-2);margin:8px 0 6px}
.metric-note{font-size:12.8px;color:var(--muted);line-height:1.7;margin:0}

/* 技巧矩阵 */
.matrix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.matrix-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:24px 22px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
 transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.matrix-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.card-icon{
 width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
 background:var(--primary-soft);color:var(--primary);margin-bottom:16px;
}
.card-icon svg{width:21px;height:21px}
.matrix-card h3{font-size:16.5px;font-weight:800;margin:0 0 10px;letter-spacing:-.2px}
.matrix-card p{font-size:14px;color:var(--muted);line-height:1.8;margin:0 0 16px}
.card-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:auto}

/* 对比表 */
.compare-wrap{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;
}
.compare-table{width:100%;border-collapse:collapse;font-size:14px}
.compare-table thead th{
 background:var(--bg-soft);color:var(--ink-2);font-weight:700;font-size:13px;
 text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.compare-table td{padding:16px 18px;border-bottom:1px solid var(--line);color:#3d5169;vertical-align:top;line-height:1.75}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody tr:hover{background:#f9fbff}
.compare-table strong{color:var(--ink);font-weight:700}
.pill{display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:999px;font-size:12px;font-weight:700}
.pill--ok{background:var(--accent-soft);color:#0a7f72}
.pill--mid{background:#fdf3dc;color:#9a6a12}
.pill--no{background:#fdeaea;color:#b23a3a}

/* 里程碑时间线 */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.timeline::before{
 content:"";position:absolute;left:22px;right:22px;top:19px;height:2px;
 background:linear-gradient(90deg,var(--primary),var(--accent));opacity:.28;border-radius:2px;
}
.step{position:relative;padding-top:52px}
.step-dot{
 position:absolute;top:0;left:0;width:38px;height:38px;border-radius:12px;
 background:#fff;border:2px solid var(--primary);color:var(--primary);
 display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px;
 box-shadow:0 6px 16px rgba(43,98,240,.16);
}
.step h3{font-size:15.5px;font-weight:800;margin:0 0 8px}
.step p{font-size:13.6px;color:var(--muted);line-height:1.78;margin:0}

/* 资讯列表 */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.news-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
 transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c8d8f8}
.news-thumb{position:relative;overflow:hidden}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:18px 20px 22px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;font-size:12.5px;color:var(--muted);margin-bottom:10px}
.news-body h3{font-size:15.5px;font-weight:800;line-height:1.55;margin:0 0 8px}
.news-body h3 a:hover{color:var(--primary)}
.news-body p{font-size:13.6px;color:var(--muted);line-height:1.78;margin:0 0 14px}
.news-link{margin-top:auto;font-size:13.5px;font-weight:700;color:var(--primary)}
.news-empty{
 background:var(--surface);border:1px dashed #c8d8f8;border-radius:var(--radius);
 padding:34px 24px;text-align:center;color:var(--muted);font-size:14px;
}

/* 内容保障 */
.assure-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.assure-item{
 background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
 border-radius:var(--radius);padding:22px 20px;
 transition:background .22s ease,border-color .22s ease,transform .22s ease;
}
.assure-item:hover{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.26);transform:translateY(-3px)}
.assure-item h3{font-size:15px;font-weight:800;color:#fff;margin:0 0 8px}
.assure-item p{font-size:13.4px;color:#a8bad2;line-height:1.78;margin:0}

/* 快速解答 */
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.quick-card{
 background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);
 border-radius:var(--radius);padding:22px 22px;box-shadow:var(--shadow-sm);
 transition:transform .22s ease,box-shadow .22s ease;
}
.quick-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.quick-card h3{font-size:15px;font-weight:800;margin:0 0 8px;color:var(--ink)}
.quick-card p{font-size:13.8px;color:var(--muted);line-height:1.8;margin:0}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:880px}
.faq-item{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:0 20px;box-shadow:var(--shadow-sm);transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:#c8d8f8;box-shadow:var(--shadow-md)}
.faq-item summary{
 list-style:none;cursor:pointer;padding:17px 34px 17px 0;position:relative;
 font-size:15px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:"";position:absolute;right:2px;top:24px;width:9px;height:9px;
 border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);
 transform:rotate(45deg);transition:transform .2s ease;
}
.faq-item[open] summary::after{transform:rotate(-135deg);border-color:var(--primary)}
.faq-item p{margin:0 0 18px;font-size:14px;color:var(--muted);line-height:1.85}

/* 订阅表单 */
.cta-panel{
 position:relative;overflow:hidden;
 background:linear-gradient(120deg,#16283f 0%,#0d1b2a 62%,#123047 100%);
 border-radius:var(--radius-lg);padding:44px 44px;color:#e6eefb;
 box-shadow:var(--shadow-md);
}
.cta-panel::after{
 content:"";position:absolute;right:-70px;top:-70px;width:260px;height:260px;border-radius:50%;
 background:radial-gradient(circle,rgba(43,98,240,.42),transparent 68%);
 pointer-events:none;
}
.cta-grid{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.cta-copy h2{font-size:25px;font-weight:800;margin:0 0 12px;color:#fff;letter-spacing:-.3px}
.cta-copy p{font-size:14px;color:#a8bad2;line-height:1.85;margin:0 0 16px}
.cta-points{list-style:none;padding:0;margin:0;display:grid;gap:9px}
.cta-points li{font-size:13.6px;color:#c7d6ea;padding-left:20px;position:relative}
.cta-points li::before{
 content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;
 background:var(--accent);
}
.subscribe-form{display:grid;gap:12px}
.field label{display:block;font-size:12.5px;font-weight:700;color:#b9c8dd;margin-bottom:6px}
.field input,.field select{
 width:100%;height:46px;border-radius:var(--radius-sm);
 border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.07);
 color:#fff;font-size:14px;padding:0 14px;outline:none;
 transition:border-color .2s,background .2s,box-shadow .2s;
}
.field input::placeholder{color:#8fa0ba}
.field select{appearance:none;cursor:pointer}
.field select option{color:#0d1b2a}
.field input:focus,.field select:focus{border-color:var(--primary);background:rgba(255,255,255,.12);box-shadow:0 0 0 4px rgba(43,98,240,.22)}
.subscribe-form .btn-solid{width:100%;margin-top:4px}
.form-tip{font-size:12.5px;color:#8fa0ba;margin:4px 0 0}
.form-msg{font-size:13.4px;font-weight:700;color:#5fe3cd;min-height:20px;margin:0}

/* ============ footer ============ */
.site-footer{background:#0d1b2a;color:#c7d3e5;padding:54px 0 26px;margin-top:0}
.footer-grid{
 display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:34px;
 padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:800;color:#fff;margin-bottom:12px}
.footer-grid > div > p{font-size:13.5px;line-height:1.85;color:#a9b8cf;margin:0}
.footer-col h4{font-size:13.5px;font-weight:700;color:#fff;letter-spacing:.4px;margin:0 0 14px}
.footer-col a{display:block;font-size:13.5px;color:#a9b8cf;padding:5px 0}
.footer-col a:hover{color:#fff}
.footer-bottom{
 display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
 padding-top:22px;font-size:12.5px;color:#8fa0ba;
}

/* ============ 响应式 ============ */
@media (max-width:1024px){
 .hero-inner{grid-template-columns:1fr;gap:28px}
 .hero-figure{order:-1}
 .hero-copy h1{font-size:29px}
 .metric-grid{grid-template-columns:repeat(2,1fr)}
 .matrix-grid{grid-template-columns:repeat(2,1fr)}
 .news-grid{grid-template-columns:repeat(2,1fr)}
 .timeline{grid-template-columns:repeat(2,1fr)}
 .timeline::before{display:none}
 .assure-grid{grid-template-columns:repeat(2,1fr)}
 .quick-grid{grid-template-columns:1fr}
 .cta-grid{grid-template-columns:1fr;gap:26px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:960px){
 .nav-toggle{display:inline-flex;order:2;margin-left:auto}
 .nav-wrap{flex-wrap:wrap;height:auto;padding:10px 0;gap:10px}
 .brand{order:1}
 .nav-search{order:3;flex:1 1 100%;max-width:none;height:38px}
 .nav-links{
  order:4;display:none;flex:1 1 100%;flex-direction:column;align-items:stretch;gap:4px;
  margin:0;padding:10px;background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow-sm);
 }
 .nav-links.is-open{display:flex}
 .nav-links a{height:42px;justify-content:flex-start;padding:0 14px;font-size:15px}
 .nav-cta{display:none}
 .section{padding:48px 0}
 .cat-hero{padding:26px 0 32px}
 .cta-panel{padding:30px 24px}
}
@media (max-width:768px){
 .metric-grid{grid-template-columns:1fr 1fr;gap:12px}
 .matrix-grid{grid-template-columns:1fr;gap:14px}
 .news-grid{grid-template-columns:1fr;gap:14px}
 .assure-grid{grid-template-columns:1fr}
 .timeline{grid-template-columns:1fr;gap:22px}
 .footer-grid{grid-template-columns:1fr;gap:24px}
 .section-title{font-size:22px}
 .compare-table thead th:nth-child(3),
 .compare-table tbody td:nth-child(3){display:none}
 .compare-wrap{overflow-x:auto}
}
@media (max-width:520px){
 body{font-size:14.5px}
 .hero-copy h1{font-size:25px}
 .hero-actions .btn-solid,.hero-actions .btn-line{width:100%}
 .metric-value{font-size:25px}
 .metric-card{padding:18px 16px}
 .compare-table thead th,.compare-table td{padding:12px 13px;font-size:13px}
 .footer-bottom{flex-direction:column;gap:6px}
 .btn-solid,.btn-line,.btn-ghost{height:44px;padding:0 18px;font-size:14.5px}
}
:focus-visible{outline:3px solid rgba(43,98,240,.42);outline-offset:2px;border-radius:6px}

/* roulang page: category3 */
:root{
 --ink:#0d1b2a;
 --ink-2:#1c2f49;
 --muted:#64748b;
 --line:#e3e9f3;
 --bg:#f6f8fc;
 --bg-soft:#eef3fb;
 --surface:#ffffff;
 --primary:#2b62f0;
 --primary-dark:#1b47c4;
 --primary-soft:#e8efff;
 --accent:#0fb8a4;
 --accent-soft:#e3f8f5;
 --warn:#d89a2a;
 --radius-lg:18px;
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(13,27,42,.05),0 8px 20px rgba(13,27,42,.05);
 --shadow-md:0 16px 40px rgba(13,27,42,.13);
 --shell:1160px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
 font-size:15px;
 line-height:1.78;
 color:var(--ink);
 background:var(--bg);
 -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,transform .2s ease}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
button{font-family:inherit}
p{margin:0 0 14px}
h1,h2,h3,h4{margin:0;line-height:1.3;font-weight:800;letter-spacing:-.2px}
ul,ol{margin:0;padding:0;list-style:none}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 20px}
:focus-visible{outline:3px solid rgba(43,98,240,.45);outline-offset:2px;border-radius:6px}

/* ============ header / nav ============ */
.site-header{
 position:sticky;top:0;z-index:200;
 background:rgba(255,255,255,.95);
 backdrop-filter:blur(14px);
 border-bottom:1px solid var(--line);
 transition:box-shadow .25s ease;
}
.site-header.is-stuck{box-shadow:0 10px 26px rgba(13,27,42,.09)}
.nav-wrap{display:flex;align-items:center;gap:16px;height:64px;position:relative}
.brand{display:flex;align-items:center;gap:9px;font-size:17.5px;font-weight:800;letter-spacing:.2px;white-space:nowrap;color:var(--ink)}
.brand:hover{color:var(--primary)}
.brand-mark{
 width:30px;height:30px;border-radius:9px;flex:0 0 auto;
 background:linear-gradient(140deg,var(--primary),#5b8bff 55%,var(--accent));
 position:relative;box-shadow:0 6px 14px rgba(43,98,240,.28);
}
.brand-mark::after{
 content:"";position:absolute;inset:8px 9px;border-radius:4px;
 border:2px solid rgba(255,255,255,.92);border-bottom-color:transparent;
}
.nav-search{
 flex:1 1 auto;max-width:400px;display:flex;align-items:center;gap:8px;
 height:40px;padding:0 6px 0 14px;
 background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;
 transition:border-color .2s,box-shadow .2s,background .2s;
}
.nav-search:focus-within{background:#fff;border-color:#b9cdf7;box-shadow:0 0 0 4px rgba(43,98,240,.12)}
.nav-search svg{flex:0 0 auto;color:#8a9ab4}
.nav-search input{
 flex:1 1 auto;min-width:0;height:100%;border:0;background:transparent;
 font-size:14px;color:var(--ink);outline:none;
}
.nav-search input::placeholder{color:#94a3b8}
.nav-search button{
 flex:0 0 auto;height:30px;padding:0 15px;border:0;border-radius:999px;
 background:var(--primary);color:#fff;font-size:13px;font-weight:600;cursor:pointer;
 transition:background .2s,transform .2s;
}
.nav-search button:hover{background:var(--primary-dark);transform:translateY(-1px)}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto}
.nav-links a{
 display:inline-flex;align-items:center;height:36px;padding:0 12px;
 font-size:14.5px;font-weight:600;color:var(--ink-2);border-radius:9px;white-space:nowrap;
}
.nav-links a:hover{background:var(--bg-soft);color:var(--primary)}
.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-cta{
 display:inline-flex;align-items:center;height:38px;padding:0 18px;
 border-radius:9px;background:var(--ink);color:#fff;font-size:14px;font-weight:600;
 white-space:nowrap;transition:background .2s,transform .2s,box-shadow .2s;
}
.nav-cta:hover{background:var(--primary);color:#fff;transform:translateY(-1px);box-shadow:0 8px 18px rgba(43,98,240,.3)}
.nav-toggle{
 display:none;align-items:center;justify-content:center;width:42px;height:38px;
 border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;color:var(--ink-2);
}

/* ============ buttons / tags ============ */
.btn-solid,.btn-line{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 height:46px;padding:0 24px;border-radius:var(--radius-sm);
 font-size:15px;font-weight:700;cursor:pointer;border:1px solid transparent;
 transition:transform .2s,box-shadow .2s,background .2s,color .2s,border-color .2s;
}
.btn-solid{background:var(--primary);color:#fff;box-shadow:0 10px 24px rgba(43,98,240,.28)}
.btn-solid:hover{background:var(--primary-dark);color:#fff;transform:translateY(-2px);box-shadow:0 14px 30px rgba(43,98,240,.34)}
.btn-line{background:#fff;color:var(--ink);border-color:#cfd9ea}
.btn-line:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px)}
.tag{
 display:inline-flex;align-items:center;height:26px;padding:0 11px;border-radius:999px;
 font-size:12.5px;font-weight:600;background:var(--primary-soft);color:var(--primary-dark);
}
.tag--accent{background:var(--accent-soft);color:#0a7f72}
.tag--line{background:#fff;border:1px solid var(--line);color:var(--muted)}

/* ============ sections ============ */
.section{padding:72px 0}
.section--soft{background:var(--bg-soft)}
.section--white{background:#fff}
.section-head{max-width:720px;margin-bottom:34px}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;
 font-size:12.5px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;
 color:var(--primary-dark);margin-bottom:12px;
}
.eyebrow::before{content:"";width:22px;height:2px;background:var(--primary);border-radius:2px}
.section-title{font-size:28px;margin-bottom:10px}
.section-desc{color:var(--muted);font-size:14.5px;line-height:1.8;margin:0}

/* ============ hero ============ */
.hero{position:relative;overflow:hidden;padding:64px 0 72px;background:linear-gradient(180deg,#eef4ff 0%,#f6f8fc 82%)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/382324f7058e3a8b.webp') center/cover no-repeat;opacity:.08;pointer-events:none}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-copy h1{font-size:38px;margin-bottom:16px}
.hero-copy h1 em{font-style:normal;color:var(--primary)}
.hero-lead{font-size:15px;color:#40536e;line-height:1.85;margin-bottom:20px}
.hero-points{display:grid;gap:10px;margin-bottom:24px}
.hero-points li{
 display:flex;gap:10px;align-items:flex-start;
 font-size:14.5px;color:var(--ink-2);line-height:1.7;
}
.hero-points li::before{
 content:"";flex:0 0 auto;width:18px;height:18px;margin-top:5px;border-radius:6px;
 background:var(--accent-soft);border:1px solid rgba(15,184,164,.35);
 background-image:linear-gradient(45deg,transparent 45%,#0a9c8b 45%,#0a9c8b 55%,transparent 55%);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:24px}
.trust-bar{
 display:flex;flex-wrap:wrap;gap:8px 20px;padding-top:18px;
 border-top:1px dashed #cdd8ea;font-size:13px;color:var(--muted);
}
.trust-bar span{display:inline-flex;align-items:center;gap:7px}
.trust-bar b{color:var(--ink);font-weight:800}
.hero-media{position:relative}
.hero-media img{
 width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg);
 box-shadow:var(--shadow-md);border:1px solid rgba(255,255,255,.7);
}
.hero-chip{
 position:absolute;left:-14px;bottom:26px;background:#fff;border:1px solid var(--line);
 border-radius:12px;padding:10px 16px;box-shadow:var(--shadow-md);
 display:flex;align-items:baseline;gap:8px;
}
.hero-chip strong{font-size:20px;color:var(--primary);font-weight:800}
.hero-chip span{font-size:12.5px;color:var(--muted);font-weight:600}

/* ============ stats ============ */
.stats{padding:0 0 62px;margin-top:-36px;position:relative;z-index:5}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:20px 20px 18px;box-shadow:var(--shadow-sm);
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.stat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c9d8f6}
.stat-num{font-size:27px;font-weight:800;color:var(--primary);letter-spacing:-.5px;line-height:1.2}
.stat-num small{font-size:14px;color:var(--muted);font-weight:700;margin-left:3px}
.stat-label{font-size:13.5px;color:var(--muted);margin-top:4px}

/* ============ card grids ============ */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.info-card{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:24px 22px;box-shadow:var(--shadow-sm);height:100%;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d8f6}
.card-icon{
 display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;
 border-radius:12px;background:var(--primary-soft);color:var(--primary-dark);
 font-size:15px;font-weight:800;margin-bottom:14px;
}
.card-icon.is-accent{background:var(--accent-soft);color:#0a7f72}
.info-card h3{font-size:17px;margin-bottom:8px}
.info-card p{font-size:14px;color:var(--muted);line-height:1.8;margin:0 0 14px}
.card-tags{display:flex;flex-wrap:wrap;gap:8px}

/* ============ flow ============ */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.flow-item{
 position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:26px 22px 22px;box-shadow:var(--shadow-sm);
 transition:transform .2s,box-shadow .2s,border-color .2s;
}
.flow-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#c9d8f6}
.flow-item::before{
 counter-increment:step;content:"0" counter(step);
 position:absolute;top:-14px;left:20px;
 display:inline-flex;align-items:center;justify-content:center;
 min-width:38px;height:28px;padding:0 8px;border-radius:8px;
 background:var(--ink);color:#fff;font-size:13px;font-weight:800;letter-spacing:.5px;
}
.flow-item h3{font-size:16px;margin:8px 0 8px}
.flow-item p{font-size:13.8px;color:var(--muted);line-height:1.78;margin:0}

/* ============ compare ============ */
.compare-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);overflow:hidden}
.compare-table{width:100%;border-collapse:collapse;font-size:14px}
.compare-table thead th{
 background:var(--bg-soft);color:var(--ink);font-size:13px;font-weight:800;letter-spacing:.4px;
 text-align:left;padding:14px 18px;border-bottom:1px solid var(--line);white-space:nowrap;
}
.compare-table tbody td{padding:15px 18px;border-bottom:1px solid #eef2f9;color:var(--ink-2);vertical-align:top;line-height:1.7}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table tbody tr:hover td{background:#fafcff}
.compare-table td strong{color:var(--ink);font-weight:800}
.type-chip{
 display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 10px;border-radius:8px;
 background:var(--primary-soft);color:var(--primary-dark);font-size:12.5px;font-weight:700;white-space:nowrap;
}

/* ============ scenarios ============ */
.scene-card{
 display:grid;grid-template-columns:1fr;gap:0;background:#fff;
 border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
 box-shadow:var(--shadow-sm);transition:transform .2s,box-shadow .2s,border-color .2s;height:100%;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d8f6}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-body{padding:20px 22px 22px}
.scene-body h3{font-size:16.5px;margin-bottom:8px}
.scene-body p{font-size:13.8px;color:var(--muted);line-height:1.8;margin:0}

/* ============ mistakes ============ */
.mistake-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.mistake{
 background:#fff;border:1px solid var(--line);border-left:4px solid var(--warn);
 border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow-sm);
}
.mistake.is-right{border-left-color:var(--accent)}
.mistake h3{font-size:15.5px;margin-bottom:8px;display:flex;align-items:center;gap:8px}
.mistake h3 span{
 display:inline-flex;align-items:center;justify-content:center;
 width:22px;height:22px;border-radius:7px;background:#fdf3df;color:#a4711a;font-size:12px;font-weight:800;
}
.mistake.is-right h3 span{background:var(--accent-soft);color:#0a7f72}
.mistake p{font-size:13.8px;color:var(--muted);line-height:1.8;margin:0}

/* ============ latest posts ============ */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.post-card{
 display:flex;flex-direction:column;justify-content:space-between;gap:14px;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s,box-shadow .2s,border-color .2s;height:100%;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#c9d8f6}
.post-card h3{font-size:16px;line-height:1.55;margin-bottom:8px}
.post-card p{font-size:13.6px;color:var(--muted);line-height:1.78;margin:0}
.post-meta{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--muted)}
.empty-note{
 grid-column:1/-1;background:#fff;border:1px dashed #c9d8f6;border-radius:var(--radius);
 padding:28px;text-align:center;color:var(--muted);font-size:14px;
}

/* ============ faq ============ */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s,box-shadow .2s;
}
.faq-item[open]{border-color:#c9d8f6;box-shadow:var(--shadow-md)}
.faq-item summary{
 cursor:pointer;list-style:none;padding:18px 22px;
 display:flex;align-items:center;justify-content:space-between;gap:14px;
 font-size:15.5px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:8px;
 display:inline-flex;align-items:center;justify-content:center;
 background:var(--primary-soft);color:var(--primary-dark);font-size:16px;font-weight:800;
 transition:transform .2s,background .2s;
}
.faq-item[open] summary::after{content:"−";background:var(--primary);color:#fff}
.faq-item .faq-body{padding:0 22px 20px;font-size:14px;color:var(--muted);line-height:1.85}

/* ============ subscribe ============ */
.subscribe{
 background:linear-gradient(135deg,#0d1b2a 0%,#17304f 60%,#1b47c4 130%);
 color:#fff;border-radius:var(--radius-lg);padding:44px 42px;
 display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;
 box-shadow:var(--shadow-md);
}
.subscribe h2{font-size:26px;color:#fff;margin-bottom:12px}
.subscribe p{font-size:14.2px;color:rgba(255,255,255,.76);line-height:1.85;margin:0}
.subscribe-form{display:flex;flex-wrap:wrap;gap:10px}
.subscribe-form input[type="email"]{
 flex:1 1 220px;min-width:0;height:48px;padding:0 16px;border-radius:var(--radius-sm);
 border:1px solid rgba(255,255,255,.28);background:rgba(255,255,255,.1);
 color:#fff;font-size:14.5px;outline:none;transition:border-color .2s,background .2s;
}
.subscribe-form input[type="email"]::placeholder{color:rgba(255,255,255,.55)}
.subscribe-form input[type="email"]:focus{border-color:#8fb2ff;background:rgba(255,255,255,.16);box-shadow:0 0 0 4px rgba(143,178,255,.18)}
.subscribe-form button{
 height:48px;padding:0 26px;border:0;border-radius:var(--radius-sm);
 background:var(--accent);color:#04231f;font-size:15px;font-weight:800;cursor:pointer;
 transition:transform .2s,box-shadow .2s,background .2s;
}
.subscribe-form button:hover{background:#12d3bb;transform:translateY(-2px);box-shadow:0 12px 26px rgba(15,184,164,.34)}
.form-note{width:100%;font-size:12.5px;color:rgba(255,255,255,.6);margin:2px 0 0}

/* ============ footer ============ */
.site-footer{background:#fff;border-top:1px solid var(--line);margin-top:72px}
.footer-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:34px;padding:56px 0 34px}
.footer-brand{display:flex;align-items:center;gap:9px;font-size:16.5px;font-weight:800;margin-bottom:12px}
.footer-grid p{font-size:13.6px;color:var(--muted);line-height:1.85;margin:0}
.footer-col h4{font-size:13px;letter-spacing:1px;text-transform:uppercase;color:var(--ink);margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:var(--muted);padding:5px 0}
.footer-col a:hover{color:var(--primary)}
.footer-bottom{
 display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
 border-top:1px solid var(--line);padding:18px 0 26px;font-size:13px;color:var(--muted);
}

/* ============ responsive ============ */
@media (max-width:1024px){
 .nav-search{display:none}
 .nav-toggle{display:inline-flex}
 .nav-cta{margin-left:auto}
 .nav-links{
  position:absolute;top:64px;left:0;right:0;margin:0;
  background:#fff;border-bottom:1px solid var(--line);
  flex-direction:column;align-items:stretch;gap:4px;
  padding:12px 16px 16px;box-shadow:0 18px 32px rgba(13,27,42,.12);
  display:none;
 }
 .nav-links.is-open{display:flex}
 .nav-links a{height:44px;padding:0 14px}
 .hero-grid{grid-template-columns:1fr;gap:36px}
 .hero-copy h1{font-size:32px}
 .hero-media{transform:none}
 .hero-chip{left:12px;bottom:12px}
 .stats-grid{grid-template-columns:repeat(2,1fr)}
 .grid-4,.flow{grid-template-columns:repeat(2,1fr)}
 .grid-3,.post-grid{grid-template-columns:repeat(2,1fr)}
 .section{padding:58px 0}
 .subscribe{grid-template-columns:1fr;padding:36px 30px}
 .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
 .compare-table{font-size:13.5px}
}
@media (max-width:768px){
 .hero{padding:44px 0 58px}
 .hero-copy h1{font-size:27px}
 .section-title{font-size:23px}
 .stats{margin-top:-24px;padding-bottom:48px}
 .grid-2,.grid-3,.grid-4,.flow,.post-grid,.mistake-grid{grid-template-columns:1fr}
 .compare-table thead th,.compare-table tbody td{padding:12px 14px}
 .compare-wrap{overflow-x:auto}
 .compare-table{min-width:620px}
 .hero-actions .btn-solid,.hero-actions .btn-line{flex:1 1 100%}
}
@media (max-width:520px){
 .nav-wrap{height:60px}
 .nav-cta{display:none}
 .nav-links{top:60px}
 .brand{font-size:16px}
 .hero-copy h1{font-size:24px}
 .hero-lead{font-size:14.2px}
 .btn-solid,.btn-line{height:44px;padding:0 18px;font-size:14.5px}
 .subscribe{padding:28px 20px;border-radius:var(--radius)}
 .subscribe h2{font-size:22px}
 .subscribe-form input[type="email"],.subscribe-form button{flex:1 1 100%;width:100%}
 .footer-grid{grid-template-columns:1fr;padding:40px 0 26px}
 .footer-bottom{font-size:12px}
 .stat-card{padding:18px}
}

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}