/* roulang page: index */
:root{
  --bg-0:#080D14;
  --bg-1:#0D1622;
  --bg-2:#101C29;
  --surface:rgba(255,255,255,0.045);
  --surface-2:rgba(12,22,34,0.72);
  --line:rgba(120,200,190,0.14);
  --line-strong:rgba(120,200,190,0.28);
  --brand:#1FC8D4;
  --brand-2:#2FE0A8;
  --brand-strong:#12A9B6;
  --brand-soft:#8CF0F5;
  --accent:#FF8A4C;
  --accent-soft:#FFB78F;
  --violet:#7B6BFF;
  --text-1:#E9F3F2;
  --text-2:#A9BDC0;
  --text-3:#6E8388;
  --ok:#35D07F;
  --warn:#F5B942;
  --err:#FF5C5C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:96px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.35);
  --shadow-glow-accent:0 0 0 1px rgba(255,138,76,.35),0 10px 30px -8px rgba(255,138,76,.55);
  --shadow-glow-brand:0 0 0 1px rgba(31,200,212,.30),0 14px 36px -14px rgba(31,200,212,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --maxw:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
body.no-scroll{overflow:hidden}
img{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-soft)}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;letter-spacing:.2px}
h1{font-size:clamp(30px,5vw,52px);line-height:1.15;font-weight:800}
h2{font-size:clamp(24px,3.4vw,36px);line-height:1.25}
h3{font-size:20px;line-height:1.4;font-weight:600}
p{margin:0 0 var(--sp-4)}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
::selection{background:rgba(31,200,212,.28);color:#fff}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:80;
  transition:background .22s var(--ease),border-color .22s var(--ease),backdrop-filter .22s var(--ease);
  border-bottom:1px solid transparent;
}
.site-header.is-scrolled{
  background:rgba(8,13,20,.78);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom-color:var(--line);
}
.header-inner{
  height:72px;display:flex;align-items:center;justify-content:space-between;gap:var(--sp-5);
}
.brand{display:flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;font-size:18px;letter-spacing:.5px}
.brand:hover{color:var(--text-1)}
.brand-mark{
  width:32px;height:32px;border-radius:10px;flex:0 0 32px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 8px 20px -10px rgba(31,200,212,.9);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:8px 8px auto 8px;height:2px;border-radius:2px;
  background:rgba(8,13,20,.55);box-shadow:0 5px 0 rgba(8,13,20,.55),0 10px 0 rgba(8,13,20,.35);
}
.nav{display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  color:var(--text-2);font-size:15px;border-radius:var(--r-pill);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link:hover{color:var(--brand);background:rgba(31,200,212,.07)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.header-actions{display:flex;align-items:center;gap:var(--sp-3)}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-md);
  background:var(--surface);border:1px solid var(--line);cursor:pointer;
  align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:1.5px;background:var(--text-1);position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:1.5px;background:var(--text-1);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:44px;padding:0 20px;border-radius:var(--r-pill);border:1px solid transparent;
  font-size:15px;font-weight:600;white-space:nowrap;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-soft));
  color:#20110A;box-shadow:var(--shadow-glow-accent);
}
.btn-primary:hover{transform:translateY(-2px);color:#20110A;box-shadow:0 0 0 1px rgba(255,138,76,.5),0 16px 36px -10px rgba(255,138,76,.7)}
.btn-outline{
  background:transparent;border-color:var(--line-strong);color:var(--text-1);
}
.btn-outline:hover{background:rgba(31,200,212,.08);border-color:var(--brand);color:var(--text-1)}
.btn-ghost{background:transparent;color:var(--brand);padding:0 4px;height:auto}
.btn-ghost:hover{color:var(--brand-soft)}
.btn-ghost .arrow{transition:transform .18s var(--ease)}
.btn-ghost:hover .arrow{transform:translateX(4px)}
.btn-block{width:100%}
.btn:disabled,.btn[aria-disabled="true"]{filter:saturate(.4);box-shadow:none;cursor:not-allowed}

/* ---------- hero ---------- */
.hero{position:relative;padding:150px 0 88px;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-160px;left:-12%;width:70%;height:520px;
  background:linear-gradient(120deg,rgba(31,200,212,.16),rgba(47,224,168,.06) 45%,transparent 70%);
  transform:skewY(-8deg);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;right:-60px;top:120px;width:320px;height:320px;
  background-image:radial-gradient(rgba(120,200,190,.22) 1px,transparent 1px);
  background-size:14px 14px;opacity:.5;pointer-events:none;
}
.hero-grid{
  position:relative;z-index:1;display:grid;grid-template-columns:7fr 5fr;gap:var(--sp-8);align-items:center;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 14px;border-radius:var(--r-pill);
  background:rgba(31,200,212,.10);border:1px solid var(--line-strong);
  color:var(--brand-soft);font-size:13px;letter-spacing:.5px;margin-bottom:var(--sp-5);
}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 10px var(--brand-2)}
.hero-title{margin-bottom:var(--sp-5);max-width:16em}
.hero-title em{
  font-style:normal;
  background:linear-gradient(100deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{max-width:60ch;font-size:17px;color:var(--text-2);margin-bottom:var(--sp-6)}
.hero-actions{display:flex;flex-wrap:wrap;gap:var(--sp-3);margin-bottom:var(--sp-7)}
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-5);max-width:560px}
.metric{border-top:1px solid var(--line);padding-top:var(--sp-4)}
.metric b{display:block;font-size:26px;line-height:1.2;color:var(--accent);font-weight:800}
.metric span{font-size:13px;color:var(--text-3)}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--shadow-glow-brand),var(--shadow-card);
  aspect-ratio:16/10;
  background:linear-gradient(135deg,rgba(31,200,212,.22),rgba(47,224,168,.10));
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.media-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,13,20,.42),rgba(8,13,20,.72));
}
.media-tag{
  position:absolute;left:18px;right:18px;bottom:18px;
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);
  padding:14px 16px;border-radius:var(--r-md);
  background:var(--surface-2);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.media-tag strong{display:block;color:var(--text-1);font-size:15px;font-weight:600}
.media-tag span{font-size:12.5px;color:var(--text-3)}
.pulse{width:9px;height:9px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 4px rgba(47,224,168,.16);flex:0 0 9px}

/* ---------- sections ---------- */
.section{padding:88px 0}
.section.alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section.deep{background:var(--bg-2)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:var(--sp-5);margin-bottom:var(--sp-7)}
.section-head .lead{max-width:64ch}
.section-kicker{display:block;font-size:13px;letter-spacing:2px;color:var(--brand);margin-bottom:10px}
.section-desc{margin-top:var(--sp-3);color:var(--text-2);max-width:68ch;font-size:16px}
.section-body{color:var(--text-2);max-width:68ch}

/* ---------- category cards ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-5)}
.cat-card{
  display:flex;flex-direction:column;gap:var(--sp-4);
  padding:26px 22px;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.cat-card:hover{transform:translateY(-4px);border-color:rgba(31,200,212,.30);box-shadow:var(--shadow-card);color:var(--text-2)}
.cat-icon{
  width:42px;height:42px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(31,200,212,.24),rgba(123,107,255,.20));
  border:1px solid var(--line-strong);color:var(--brand-soft);
}
.cat-card h3{color:var(--text-1)}
.cat-card p{font-size:14.5px;margin:0;color:var(--text-2)}
.cat-card .more{font-size:14px;color:var(--brand);margin-top:auto}

/* ---------- table ---------- */
.table-wrap{
  border-radius:var(--r-lg);border:1px solid var(--line);overflow:hidden;
  background:var(--surface-2);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.plan-table{width:100%;border-collapse:collapse;font-size:15px}
.plan-table thead th{
  position:sticky;top:0;z-index:2;
  background:rgba(16,28,41,.95);
  color:var(--text-1);font-weight:600;font-size:14.5px;text-align:left;
  padding:18px 20px;border-bottom:1px solid var(--line-strong);
}
.plan-table tbody td{
  padding:16px 20px;border-bottom:1px solid var(--line);color:var(--text-2);vertical-align:middle;
}
.plan-table tbody tr:last-child td{border-bottom:none}
.plan-table tbody tr:hover td{background:rgba(31,200,212,.035)}
.plan-table td.row-head,.plan-table th.row-head{color:var(--text-1);font-weight:600}
.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:var(--r-pill);font-size:13px;line-height:1.6}
.pill-blue{background:rgba(31,200,212,.14);color:var(--brand-soft);border:1px solid rgba(31,200,212,.26)}
.pill-violet{background:rgba(123,107,255,.16);color:#BAB2FF;border:1px solid rgba(123,107,255,.30)}
.pill-orange{background:rgba(255,138,76,.14);color:var(--accent-soft);border:1px solid rgba(255,138,76,.28)}
.pill-muted{background:rgba(255,255,255,.05);color:var(--text-3);border:1px solid var(--line)}

/* ---------- plan cards ---------- */
.plan-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:var(--sp-5)}
.plan-card{
  position:relative;display:flex;flex-direction:column;
  padding:28px 24px;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.plan-card:hover{transform:translateY(-4px);border-color:rgba(31,200,212,.30);box-shadow:var(--shadow-card)}
.plan-card.featured{
  border:1.5px solid transparent;
  background:
    linear-gradient(var(--bg-1),var(--bg-1)) padding-box,
    linear-gradient(140deg,var(--brand),var(--violet),var(--accent)) border-box;
}
.plan-flag{
  position:absolute;top:-12px;right:18px;padding:3px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;color:#160B22;
  background:linear-gradient(135deg,var(--brand-2),var(--brand));
}
.plan-badge{
  display:inline-flex;align-items:center;height:26px;padding:0 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:600;width:fit-content;margin-bottom:var(--sp-4);
  background:linear-gradient(135deg,rgba(123,107,255,.28),rgba(31,200,212,.24));
  border:1px solid rgba(123,107,255,.36);color:#C9C3FF;
}
.plan-price{display:flex;align-items:baseline;gap:6px;margin-bottom:6px}
.plan-price b{font-size:32px;font-weight:800;color:var(--accent);line-height:1}
.plan-price span{font-size:13px;color:var(--text-3)}
.plan-note{font-size:13px;color:var(--text-3);margin-bottom:var(--sp-5)}
.plan-list{display:flex;flex-direction:column;gap:11px;margin-bottom:var(--sp-6)}
.plan-list li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2);line-height:1.7}
.plan-list li i{
  flex:0 0 18px;width:18px;height:18px;border-radius:50%;margin-top:4px;
  display:flex;align-items:center;justify-content:center;
  background:rgba(31,200,212,.14);border:1px solid rgba(31,200,212,.3);
}
.plan-list li i::after{content:"";width:7px;height:4px;border-left:1.5px solid var(--brand-soft);border-bottom:1.5px solid var(--brand-soft);transform:rotate(-45deg) translate(1px,-2px)}
.plan-card .btn{margin-top:auto}

/* ---------- preview ---------- */
.preview-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-5)}
.preview-card{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  background:var(--surface);transition:transform .2s var(--ease),border-color .2s var(--ease)
}
.preview-card:hover{transform:translateY(-4px);border-color:rgba(31,200,212,.3)}
.thumb{
  position:relative;aspect-ratio:16/9;overflow:hidden;
  background:linear-gradient(135deg,rgba(31,200,212,.28),rgba(47,224,168,.14));
}
.thumb::after{
  content:attr(data-ph);position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:40px;font-weight:800;color:rgba(8,13,20,.42);z-index:0;
}
.thumb img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.preview-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px}
.preview-body h3{font-size:17px}
.preview-body p{font-size:14px;margin:0;color:var(--text-2)}
.perm{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--warn);
  padding-top:10px;border-top:1px dashed var(--line);
}
.lock{
  position:absolute;inset:0;z-index:2;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(180deg,rgba(8,13,20,.30),rgba(8,13,20,.68));
  backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px);
}
.lock svg{width:26px;height:26px;color:var(--brand-soft);opacity:.9}
.tagline-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:var(--sp-5)}

/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-5)}
.news-card{
  display:flex;flex-direction:column;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--surface);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.news-card:hover{transform:translateY(-4px);border-color:rgba(31,200,212,.3);box-shadow:var(--shadow-card)}
.news-body{padding:20px;display:flex;flex-direction:column;gap:12px;flex:1}
.badge{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  font-size:12.5px;background:rgba(31,200,212,.12);color:var(--brand-soft);border:1px solid rgba(31,200,212,.24);
  width:fit-content;
}
.news-body h3{font-size:17px;line-height:1.5}
.news-body h3 a{color:var(--text-1)}
.news-body h3 a:hover{color:var(--brand)}
.news-body p{font-size:14.5px;margin:0;color:var(--text-2);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta{display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3);margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}
.meta a{font-size:13.5px}
.empty{
  border:1px dashed var(--line-strong);border-radius:var(--r-lg);
  padding:56px 24px;text-align:center;background:var(--surface);
}
.empty svg{width:40px;height:40px;color:var(--brand);opacity:.7;margin-bottom:var(--sp-4)}
.empty p{color:var(--text-3);margin-bottom:var(--sp-5)}

/* ---------- quotes ---------- */
.quote-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--sp-5)}
.quote-card{
  padding:26px 24px;border-radius:var(--r-lg);border:1px solid var(--line);
  background:var(--surface-2);display:flex;flex-direction:column;gap:var(--sp-4);
}
.quote-card blockquote{margin:0;color:var(--text-2);font-size:15px;line-height:1.85}
.quote-card blockquote::before{content:"“";color:var(--brand);font-size:22px;margin-right:2px}
.who{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:var(--sp-4);border-top:1px solid var(--line)}
.avatar{
  width:38px;height:38px;border-radius:50%;flex:0 0 38px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,rgba(31,200,212,.3),rgba(123,107,255,.3));
  color:var(--text-1);font-size:14px;font-weight:600;border:1px solid var(--line-strong);
}
.who b{display:block;color:var(--text-1);font-size:14.5px;font-weight:600}
.who span{font-size:12.5px;color:var(--text-3)}
.stars{display:flex;gap:3px}
.stars i{width:14px;height:14px;background:var(--accent);clip-path:polygon(50% 0%,61% 35%,98% 35%,68% 57%,79% 91%,50% 70%,21% 91%,32% 57%,2% 35%,39% 35%)}

/* ---------- faq ---------- */
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:var(--sp-3)}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);background:var(--surface);
  overflow:hidden;transition:border-color .2s var(--ease)
}
.faq-item.is-open{border-color:var(--line-strong)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);
  padding:18px 20px;background:none;border:none;cursor:pointer;text-align:left;
  color:var(--text-1);font-size:16px;font-weight:600;line-height:1.6;
  border-left:3px solid transparent;transition:border-color .2s var(--ease),color .2s var(--ease)
}
.faq-q:hover{color:var(--brand-soft)}
.faq-item.is-open .faq-q{border-left-color:var(--brand)}
.faq-q .chev{flex:0 0 18px;width:18px;height:18px;transition:transform .2s var(--ease);color:var(--brand)}
.faq-item.is-open .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s var(--ease)}
.faq-a p{padding:0 20px 20px;margin:0;font-size:15px;color:var(--text-2)}

/* ---------- cta + form ---------- */
.cta{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-strong);
  padding:56px 48px;
  background:linear-gradient(135deg,rgba(31,200,212,.14),rgba(123,107,255,.10) 50%,rgba(255,138,76,.12));
}
.cta::before{
  content:"";position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-2.webp');
  background-size:cover;background-position:center;
  opacity:.20;z-index:0;
}
.cta-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-8);align-items:start}
.cta-copy h2{margin-bottom:var(--sp-4)}
.cta-copy p{color:var(--text-2);max-width:52ch}
.cta-points{display:flex;flex-direction:column;gap:10px;margin-top:var(--sp-5)}
.cta-points li{display:flex;gap:10px;font-size:15px;align-items:flex-start}
.cta-points li::before{content:"";flex:0 0 16px;height:1px;margin-top:15px;background:var(--brand)}
.form-card{
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px 24px;backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.form-grid{display:grid;gap:var(--sp-4)}
.field label{display:block;font-size:13.5px;color:var(--text-2);margin-bottom:8px}
.input{
  width:100%;height:46px;padding:0 14px;border-radius:var(--r-sm);
  background:rgba(8,13,20,.55);border:1px solid var(--line);
  color:var(--text-1);font-size:15px;transition:border-color .18s var(--ease),box-shadow .18s var(--ease)
}
.input::placeholder{color:var(--text-3)}
.input:hover{border-color:var(--line-strong)}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 2px rgba(31,200,212,.32)}
select.input{appearance:none;background-image:linear-gradient(45deg,transparent 50%,var(--text-3) 50%),linear-gradient(135deg,var(--text-3) 50%,transparent 50%);background-position:calc(100% - 20px) 21px,calc(100% - 15px) 21px;background-size:5px 5px,5px 5px;background-repeat:no-repeat}
.field.invalid .input{border-color:var(--err);box-shadow:0 0 0 2px rgba(255,92,92,.2)}
.err-text{display:none;font-size:13px;color:var(--err);margin-top:6px}
.field.invalid .err-text{display:block}
.form-msg{margin-top:var(--sp-4);font-size:14px;display:none}
.form-msg.ok{display:block;color:var(--ok)}
.form-msg.bad{display:block;color:var(--err)}
.form-hint{font-size:12.5px;color:var(--text-3);margin-top:14px;line-height:1.7}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 32px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:var(--sp-7)}
.footer-col h4{font-size:15px;margin-bottom:var(--sp-4);color:var(--text-1)}
.footer-col p{font-size:14px;color:var(--text-3);max-width:34ch}
.footer-col ul{display:flex;flex-direction:column;gap:12px}
.footer-col ul a{color:var(--text-2);font-size:14.5px}
.footer-col ul a:hover{color:var(--brand)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:var(--sp-4)}
.copyright{
  margin-top:var(--sp-7);padding-top:var(--sp-5);border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);flex-wrap:wrap;
  font-size:13.5px;color:var(--text-3)
}

/* ---------- drawer ---------- */
.drawer{
  position:fixed;inset:0 0 0 auto;width:min(340px,86vw);z-index:90;
  background:rgba(9,15,23,.97);border-left:1px solid var(--line);
  transform:translateX(100%);transition:transform .26s var(--ease);
  padding:88px 24px 32px;display:flex;flex-direction:column;gap:6px;
  backdrop-filter:blur(16px) saturate(140%);-webkit-backdrop-filter:blur(16px) saturate(140%);
}
.drawer.is-open{transform:translateX(0)}
.drawer a{
  display:flex;align-items:center;min-height:48px;padding:0 14px;border-radius:var(--r-md);
  color:var(--text-2);font-size:16px;
}
.drawer a:hover{background:rgba(31,200,212,.08);color:var(--brand)}
.drawer a.active{color:var(--text-1);background:rgba(31,200,212,.10)}
.drawer .btn{margin-top:var(--sp-5)}
.scrim{position:fixed;inset:0;background:rgba(4,8,12,.6);z-index:85;opacity:0;visibility:hidden;transition:opacity .22s var(--ease),visibility .22s var(--ease)}
.scrim.is-open{opacity:1;visibility:visible}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .cat-grid,.plan-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:1024px){
  .nav{display:none}
  .nav-toggle{display:flex}
  .hero{padding:128px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:var(--sp-7)}
  .hero-media{order:-1;aspect-ratio:16/9}
  .section{padding:72px 0}
  .preview-grid,.news-grid,.quote-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{grid-template-columns:1fr}
  .cta{padding:40px 28px}
  .footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--sp-6)}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .section-head{flex-direction:column;align-items:flex-start;gap:var(--sp-3)}
  .metrics{grid-template-columns:1fr 1fr;gap:var(--sp-4)}
  .preview-grid,.news-grid,.quote-grid{grid-template-columns:1fr}
  .hero-actions .btn{width:100%}
  .table-wrap{border:none;background:none;backdrop-filter:none;-webkit-backdrop-filter:none}
  .plan-table thead{display:none}
  .plan-table,.plan-table tbody,.plan-table tr,.plan-table td{display:block;width:100%}
  .plan-table tr{
    border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:var(--sp-4);
    background:var(--surface);overflow:hidden;
  }
  .plan-table td{
    display:flex;align-items:center;justify-content:space-between;gap:var(--sp-4);
    padding:12px 16px;border-bottom:1px solid var(--line);
  }
  .plan-table tbody tr td:last-child{border-bottom:none}
  .plan-table td::before{content:attr(data-label);color:var(--text-3);font-size:13px;flex:0 0 auto}
  .plan-table td.row-head{background:rgba(31,200,212,.07);font-size:15.5px}
  .plan-table td.row-head::before{display:none}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .header-inner{height:64px}
  .cat-grid,.plan-grid{grid-template-columns:1fr}
  .metrics{grid-template-columns:1fr 1fr}
  .metric b{font-size:22px}
  .cta{padding:32px 20px}
  .footer-grid{grid-template-columns:1fr}
  .copyright{flex-direction:column;align-items:flex-start}
  h1{letter-spacing:0}
}

/* roulang page: article */
:root{
  --bg-0:#080D14;
  --bg-1:#0D1622;
  --bg-2:#101C29;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(12,22,34,.72);
  --line:rgba(120,200,190,.14);
  --line-strong:rgba(120,200,190,.28);
  --brand:#1FC8D4;
  --brand-2:#2FE0A8;
  --brand-strong:#12A9B6;
  --brand-soft:#8CF0F5;
  --accent:#FF8A4C;
  --accent-soft:#FFB78F;
  --violet:#7B6BFF;
  --text-1:#E9F3F2;
  --text-2:#A9BDC0;
  --text-3:#6E8388;
  --ok:#35D07F;
  --warn:#F5B942;
  --err:#FF5C5C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.35);
  --glow-accent:0 0 0 1px rgba(255,138,76,.35),0 10px 30px -8px rgba(255,138,76,.55);
  --glow-brand:0 0 0 1px rgba(31,200,212,.35),0 12px 34px -14px rgba(31,200,212,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px;
  --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
  background:var(--bg-0);
  background-image:
    radial-gradient(1100px 520px at 12% -8%, rgba(31,200,212,.16), transparent 62%),
    radial-gradient(900px 460px at 92% 4%, rgba(123,107,255,.12), transparent 60%),
    radial-gradient(760px 420px at 60% 100%, rgba(255,138,76,.07), transparent 65%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand)}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;letter-spacing:.2px}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,select,textarea{font:inherit}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:var(--r-sm)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1;white-space:nowrap;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),border-color .18s var(--ease),color .18s var(--ease);
}
.btn-sm{padding:10px 20px;font-size:14px}
.btn-primary{
  color:#26120A;
  background:linear-gradient(135deg,var(--accent),var(--accent-soft));
  box-shadow:var(--glow-accent);
}
.btn-primary:hover{color:#26120A;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,138,76,.5),0 16px 38px -10px rgba(255,138,76,.65)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{
  color:var(--brand-soft);
  border:1px solid var(--line-strong);
  background:transparent;
}
.btn-outline:hover{color:var(--text-1);border-color:var(--brand);background:rgba(31,200,212,.08)}
.btn-ghost{color:var(--brand);padding:8px 0;font-weight:600}
.btn-ghost svg{transition:transform .2s var(--ease)}
.btn-ghost:hover svg{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{filter:saturate(.4);box-shadow:none;cursor:not-allowed}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,13,20,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease),box-shadow .2s var(--ease);
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  background:rgba(8,13,20,.9);
  box-shadow:0 12px 30px -22px rgba(0,0,0,.9);
}
.header-inner{display:flex;align-items:center;gap:28px;height:72px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:0 0 auto}
.brand-mark{
  width:22px;height:22px;border-radius:7px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 18px -2px rgba(31,200,212,.75);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:6px 5px auto 5px;height:6px;border-radius:3px;
  background:rgba(8,13,20,.55);
}
.logo-text{color:var(--text-1);font-size:19px;font-weight:800;letter-spacing:.6px}
.nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:44px;
  padding:0 14px;border-radius:var(--r-sm);
  color:var(--text-2);font-size:15px;font-weight:500;
}
.nav-link:hover{color:var(--brand);background:rgba(31,200,212,.06)}
.nav-link.active{color:var(--text-1)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:6px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.header-actions{display:flex;align-items:center;gap:12px;flex:0 0 auto}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--surface);
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-1);transition:transform .2s var(--ease),opacity .2s var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- 文章头图区 ---------- */
.article-hero{
  position:relative;overflow:hidden;
  padding:52px 0 96px;
  background:var(--bg-1);
  border-bottom:1px solid var(--line);
}
.hero-bg{
  position:absolute;inset:0;
  background-size:cover;background-position:center;
  opacity:.5;
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,13,20,.72) 0%,rgba(8,13,20,.88) 60%,var(--bg-0) 100%);
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.breadcrumb a{color:var(--text-3)}
.breadcrumb a:hover{color:var(--brand)}
.breadcrumb .sep{color:rgba(110,131,136,.7)}
.breadcrumb .current{color:var(--text-2);max-width:46ch;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-head{max-width:860px}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);
  font-size:13px;font-weight:600;letter-spacing:.4px;
}
.badge-brand{color:var(--brand-soft);background:rgba(31,200,212,.12);border:1px solid rgba(31,200,212,.3)}
.badge-violet{color:#C9C3FF;background:rgba(123,107,255,.14);border:1px solid rgba(123,107,255,.35)}
.badge-accent{color:var(--accent-soft);background:rgba(255,138,76,.12);border:1px solid rgba(255,138,76,.32)}
.article-head h1{
  margin:18px 0 20px;
  font-size:clamp(30px,5vw,52px);
  line-height:1.15;
  font-weight:800;
}
.meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px 20px;font-size:13.5px;color:var(--text-3)}
.meta-item{display:inline-flex;align-items:center;gap:7px}
.meta-item svg{width:15px;height:15px;stroke:var(--brand);fill:none;stroke-width:1.5}
.meta-divider{width:1px;height:14px;background:var(--line-strong)}

/* ---------- 正文 ---------- */
.article-section{padding:0 0 88px}
.article-card{
  position:relative;z-index:3;
  margin-top:-58px;
  padding:48px clamp(20px,4vw,56px);
  background:linear-gradient(180deg,rgba(16,28,41,.94),rgba(10,18,28,.94));
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
.article-body{max-width:800px;margin:0 auto;font-size:16px;line-height:1.9;color:var(--text-2);overflow-wrap:break-word}
.article-body > *:first-child{margin-top:0}
.article-body > * + *{margin-top:18px}
.article-body p{max-width:100%}
.article-body h2{
  margin:44px 0 16px;padding-left:14px;
  font-size:clamp(22px,3vw,28px);line-height:1.35;
  border-left:3px solid var(--brand);
}
.article-body h3{margin:34px 0 12px;font-size:20px;line-height:1.4;color:var(--text-1)}
.article-body h4{margin:26px 0 10px;font-size:17px;color:var(--text-1)}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(31,200,212,.35)}
.article-body a:hover{color:var(--brand-soft);border-bottom-color:var(--brand-soft)}
.article-body strong{color:var(--text-1);font-weight:700}
.article-body ul,.article-body ol{padding-left:22px}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin:8px 0;padding-left:2px}
.article-body li::marker{color:var(--brand)}
.article-body blockquote{
  margin:28px 0;padding:18px 22px;
  background:var(--surface);
  border-left:3px solid var(--brand-2);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:var(--text-1);font-size:15.5px;
}
.article-body blockquote p{margin:0}
.article-body img{border-radius:var(--r-md);margin:26px auto;border:1px solid var(--line)}
.article-body hr{border:0;height:1px;background:var(--line);margin:36px 0}
.article-body table{
  width:100%;border-collapse:collapse;margin:26px 0;
  font-size:15px;border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;
}
.article-body th,.article-body td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line)}
.article-body th{background:rgba(31,200,212,.08);color:var(--text-1);font-weight:600}
.article-body tr:last-child td{border-bottom:0}
.article-body code{
  padding:2px 7px;border-radius:6px;font-size:14px;
  background:rgba(31,200,212,.12);color:var(--brand-soft);
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
.article-body pre{
  margin:26px 0;padding:18px 20px;overflow-x:auto;
  background:#0A1220;border:1px solid var(--line);border-radius:var(--r-md);
}
.article-body pre code{background:none;padding:0;color:var(--text-2)}

/* ---------- 空态 ---------- */
.empty-state{
  max-width:640px;margin:12px auto;text-align:center;
  padding:52px 24px;border:1px dashed var(--line-strong);border-radius:var(--r-lg);
  background:var(--surface);
}
.empty-icon{
  width:58px;height:58px;margin:0 auto 20px;border-radius:var(--r-md);
  background:linear-gradient(135deg,rgba(31,200,212,.22),rgba(47,224,168,.14));
  border:1px solid var(--line-strong);
  display:flex;align-items:center;justify-content:center;
}
.empty-icon svg{width:26px;height:26px;stroke:var(--brand);fill:none;stroke-width:1.5}
.empty-state h3{font-size:20px;margin-bottom:10px}
.empty-state p{margin-bottom:22px;color:var(--text-2)}

/* ---------- 标签与分享 ---------- */
.tag-panel{
  max-width:800px;margin:40px auto 0;padding-top:26px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
}
.tag-panel .label{font-size:13px;color:var(--text-3);letter-spacing:1px}
.tag{
  display:inline-flex;align-items:center;padding:6px 14px;
  border-radius:var(--r-pill);font-size:13px;color:var(--text-2);
  background:var(--surface);border:1px solid var(--line);
  transition:color .18s var(--ease),border-color .18s var(--ease),transform .18s var(--ease);
}
.tag:hover{color:var(--brand);border-color:var(--line-strong);transform:translateY(-2px)}
.back-row{max-width:800px;margin:26px auto 0;display:flex;flex-wrap:wrap;gap:18px;align-items:center}

/* ---------- 相关推荐 ---------- */
.related{padding:88px 0;background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:34px}
.section-head h2{font-size:clamp(24px,3.4vw,36px);line-height:1.25}
.section-head .sub{margin-top:10px;font-size:15px;color:var(--text-2);max-width:62ch}
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface-2);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-card);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong);box-shadow:0 24px 48px -24px rgba(0,0,0,.6)}
.card-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:linear-gradient(135deg,rgba(31,200,212,.25),rgba(47,224,168,.18))}
.card-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.card:hover .card-thumb img{transform:scale(1.05)}
.card-thumb .ph{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-size:26px;font-weight:800;color:rgba(8,13,20,.6);
}
.card-body{padding:22px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:18px;line-height:1.45;color:var(--text-1)}
.card-body p{font-size:14.5px;color:var(--text-2);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:13px;color:var(--text-3)}

/* ---------- CTA 条 ---------- */
.cta-band{position:relative;overflow:hidden;padding:88px 0;background:var(--bg-2)}
.cta-band .cta-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.42}
.cta-band .cta-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,13,20,.94),rgba(8,13,20,.7))}
.cta-inner{position:relative;z-index:2;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:28px}
.cta-inner h2{font-size:clamp(24px,3.4vw,34px);line-height:1.25;margin-bottom:12px}
.cta-inner p{max-width:56ch;font-size:15.5px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--bg-0);border-top:1px solid var(--line);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col p{font-size:14.5px;color:var(--text-2);max-width:36ch}
.footer-col h4{font-size:15px;margin-bottom:16px;color:var(--text-1)}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col ul a{font-size:14.5px;color:var(--text-2)}
.footer-col ul a:hover{color:var(--brand)}
.copyright{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .container{padding:0 20px}
  .nav{
    position:absolute;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    padding:14px 20px 22px;
    background:rgba(10,18,28,.98);
    border-bottom:1px solid var(--line);
    box-shadow:0 24px 40px -28px rgba(0,0,0,.9);
    display:none;
  }
  .nav.is-open{display:flex}
  .nav-link{height:50px;font-size:16px;border-radius:var(--r-md)}
  .nav-link.active::after{left:14px;right:auto;width:28px;bottom:12px}
  .nav-toggle{display:inline-flex}
  .header-actions .btn-primary{display:none}
  .card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:768px){
  .article-hero{padding:38px 0 82px}
  .article-card{margin-top:-48px;padding:32px 20px;border-radius:var(--r-md)}
  .article-section{padding-bottom:64px}
  .related,.cta-band{padding:64px 0}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .cta-actions .btn,.cta-actions{width:100%}
  .cta-actions .btn{width:100%}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .logo-text{font-size:17px}
  .article-head h1{font-size:clamp(26px,7vw,34px)}
  .card-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .meta-row{gap:8px 14px}
  .meta-divider{display:none}
  .breadcrumb .current{max-width:100%}
  .btn{padding:13px 20px}
}

/* roulang page: category1 */
:root{
  --bg-0:#080D14;
  --bg-1:#0D1622;
  --bg-2:#101C29;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(12,22,34,.72);
  --line:rgba(120,200,190,.14);
  --line-strong:rgba(120,200,190,.28);
  --brand:#1FC8D4;
  --brand-2:#2FE0A8;
  --brand-strong:#12A9B6;
  --brand-soft:#8CF0F5;
  --accent:#FF8A4C;
  --accent-soft:#FFB78F;
  --violet:#7B6BFF;
  --text-1:#E9F3F2;
  --text-2:#A9BDC0;
  --text-3:#6E8388;
  --ok:#35D07F;
  --warn:#F5B942;
  --err:#FF5C5C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.35);
  --shadow-glow:0 0 0 1px rgba(255,138,76,.35), 0 10px 30px -8px rgba(255,138,76,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px; --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:88px;
  --font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-1);
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:.2px}
h1{font-size:clamp(30px,5vw,52px);line-height:1.15;font-weight:800}
h2{font-size:clamp(24px,3.4vw,36px);line-height:1.25}
h3{font-size:clamp(18px,2.1vw,22px);line-height:1.4;font-weight:600}
p{margin:0;color:var(--text-2);max-width:68ch}
a{color:inherit;text-decoration:none;transition:color 180ms var(--ease)}
a:hover{color:var(--brand)}
img{display:block;max-width:100%;height:auto}
ul,ol{margin:0;padding:0;list-style:none}
button{font-family:inherit;font-size:inherit;cursor:pointer;border:0;background:none;color:inherit}
input,select,textarea{font-family:inherit;font-size:16px}
::selection{background:rgba(31,200,212,.3)}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:88px 0}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:40px}
.section-head p{margin-top:14px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.08em;color:var(--brand-soft);
  background:rgba(31,200,212,.09);
  border:1px solid var(--line-strong);
  padding:6px 14px;border-radius:var(--r-pill);margin-bottom:20px;
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 10px var(--brand-2)}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,13,20,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
  transition:background 200ms var(--ease),border-color 200ms var(--ease);
}
.site-header.is-scrolled{background:rgba(8,13,20,.92);border-bottom-color:var(--line-strong)}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:28px;height:28px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(140deg,var(--brand) 0%,var(--brand-2) 100%);
  box-shadow:0 0 18px -2px rgba(31,200,212,.6);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:7px 6px auto 6px;height:2px;border-radius:2px;
  background:rgba(8,13,20,.65);box-shadow:0 5px 0 rgba(8,13,20,.45);
}
.brand-text{font-weight:700;font-size:18px;color:var(--text-1);letter-spacing:.5px}
.nav{display:flex;align-items:center;gap:6px;margin-left:auto}
.nav-link{
  position:relative;padding:10px 14px;border-radius:var(--r-sm);
  font-size:15px;color:var(--text-2);white-space:nowrap;
  transition:color 180ms var(--ease),background 180ms var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
  transform:scaleX(0);transform-origin:left;transition:transform 200ms var(--ease);
}
.nav-link:hover{color:var(--brand);background:rgba(31,200,212,.07);text-decoration:none}
.nav-link.active{color:var(--text-1);font-weight:600}
.nav-link.active::after{transform:scaleX(1)}
.nav-cta-mobile{display:none}
.header-cta{flex-shrink:0}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-sm);
  border:1px solid var(--line-strong);align-items:center;justify-content:center;
  flex-direction:column;gap:5px;
}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--text-1);transition:transform 200ms var(--ease),opacity 200ms var(--ease)}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 26px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;white-space:nowrap;
  transition:transform 180ms var(--ease),box-shadow 200ms var(--ease),background 200ms var(--ease),color 200ms var(--ease),border-color 200ms var(--ease);
}
.btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.5;transition:transform 200ms var(--ease)}
.btn:hover svg{transform:translateX(3px)}
.btn-primary{
  background:linear-gradient(135deg,var(--accent) 0%,var(--accent-soft) 100%);
  color:#1A0D05;box-shadow:var(--shadow-glow);
}
.btn-primary:hover{color:#1A0D05;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,138,76,.5),0 16px 34px -10px rgba(255,138,76,.65)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{
  background:transparent;color:var(--brand-soft);border:1px solid var(--line-strong);
}
.btn-ghost:hover{color:var(--text-1);background:rgba(31,200,212,.1);border-color:var(--brand);transform:translateY(-2px)}
.btn-sm{height:42px;padding:0 20px;font-size:14px}
.btn-block{width:100%}
.btn[disabled]{filter:saturate(.4);opacity:.7;box-shadow:none;cursor:not-allowed}

/* ---------- tags / badges ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  font-size:13px;line-height:1;padding:6px 12px;border-radius:var(--r-pill);
  border:1px solid var(--line-strong);color:var(--text-2);background:var(--surface);
}
.tag--brand{color:var(--brand-soft);border-color:rgba(31,200,212,.4);background:rgba(31,200,212,.1)}
.tag--violet{color:#C6BEFF;border-color:rgba(123,107,255,.45);background:rgba(123,107,255,.14)}
.tag--accent{color:var(--accent-soft);border-color:rgba(255,138,76,.4);background:rgba(255,138,76,.12)}
.tag-row{display:flex;flex-wrap:wrap;gap:10px}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:80px 0 72px;
  background:
    radial-gradient(900px 460px at 82% -12%,rgba(31,200,212,.16),transparent 62%),
    radial-gradient(700px 420px at 4% 108%,rgba(255,138,76,.1),transparent 60%),
    var(--bg-0);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;top:-40%;right:-10%;width:56%;height:180%;
  background:linear-gradient(115deg,rgba(31,200,212,.16),rgba(47,224,168,.06) 55%,transparent 78%);
  transform:skewX(-14deg);pointer-events:none;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:radial-gradient(rgba(140,240,245,.16) 1px,transparent 1px);
  background-size:32px 32px;
  mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 70%);
  -webkit-mask-image:linear-gradient(180deg,rgba(0,0,0,.5),transparent 70%);
}
.hero-inner{position:relative;z-index:2;max-width:880px}
.hero h1{margin-bottom:20px}
.hero h1 em{font-style:normal;color:var(--brand-soft)}
.hero-sub{font-size:17px;color:var(--text-2);max-width:62ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-metrics{
  display:flex;flex-wrap:wrap;gap:32px;margin-top:44px;
  padding-top:28px;border-top:1px solid var(--line);
}
.metric{min-width:150px}
.metric b{display:block;font-size:28px;line-height:1.2;color:var(--accent);font-weight:800;letter-spacing:.5px}
.metric span{font-size:13px;color:var(--text-3)}

/* ---------- compare table ---------- */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r-lg);
  background:var(--surface-2);overflow:hidden;
  box-shadow:var(--shadow-card);
}
.compare-table{width:100%;border-collapse:collapse;min-width:640px}
.compare-table thead th{
  position:sticky;top:0;z-index:2;
  background:rgba(16,28,41,.96);
  backdrop-filter:blur(8px);
  padding:18px 20px;text-align:left;
  font-size:14px;font-weight:600;color:var(--text-2);
  border-bottom:1px solid var(--line-strong);white-space:nowrap;
}
.compare-table thead th:nth-child(2){color:var(--text-2)}
.compare-table thead th:nth-child(3){color:var(--brand-soft)}
.compare-table thead th:nth-child(4){color:#C6BEFF}
.compare-table thead th:nth-child(5){color:var(--accent-soft)}
.compare-table tbody tr{border-bottom:1px solid var(--line)}
.compare-table tbody tr:last-child{border-bottom:0}
.compare-table tbody tr:hover{background:rgba(31,200,212,.05)}
.compare-table td{padding:16px 20px;font-size:15px;color:var(--text-2);min-height:52px}
.compare-table td:first-child{color:var(--text-1);font-weight:600;font-size:14.5px}
.cell-brand{color:var(--brand-soft) !important;background:rgba(31,200,212,.07)}
.cell-violet{color:#C6BEFF !important;background:rgba(123,107,255,.08)}
.cell-accent{color:var(--accent-soft) !important;background:rgba(255,138,76,.08)}
.table-note{margin-top:16px;font-size:13px;color:var(--text-3)}

/* ---------- cards ---------- */
.card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  padding:26px;
  box-shadow:var(--shadow-card);
  transition:transform 220ms var(--ease),border-color 220ms var(--ease),box-shadow 220ms var(--ease);
}
.card:hover{transform:translateY(-4px);border-color:rgba(31,200,212,.42);box-shadow:0 24px 46px -22px rgba(0,0,0,.5)}
.card h3{margin-bottom:12px;color:var(--text-1)}
.card p{font-size:15px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}

/* ---------- split copy ---------- */
.split{display:grid;grid-template-columns:repeat(2,1fr);gap:40px}
.split h3{margin-bottom:10px;color:var(--text-1)}
.split h3 + p{margin-bottom:26px}
.media-band{margin-top:48px;display:grid;grid-template-columns:1.35fr 1fr;gap:0;
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--bg-2)}
.media-band figure{position:relative;margin:0;aspect-ratio:16/9;overflow:hidden}
.media-band img{width:100%;height:100%;object-fit:cover;filter:brightness(.82)}
.media-band figcaption{position:absolute;left:16px;bottom:14px;font-size:12.5px;color:rgba(233,243,242,.85);background:rgba(8,13,20,.55);padding:4px 10px;border-radius:var(--r-pill)}
.media-copy{padding:32px;display:flex;flex-direction:column;justify-content:center;gap:14px}
.media-copy ul{display:grid;gap:12px}
.media-copy li{display:flex;gap:10px;font-size:14.5px;color:var(--text-2)}
.media-copy li::before{content:"";flex-shrink:0;width:8px;height:8px;margin-top:9px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-2))}

/* ---------- checklist ---------- */
.check-list{display:grid;gap:14px;margin-top:26px}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.check-list li i{
  flex-shrink:0;width:20px;height:20px;margin-top:5px;border-radius:50%;
  border:1px solid rgba(31,200,212,.5);display:grid;place-items:center;
  font-style:normal;font-size:11px;color:var(--brand-soft);
}

/* ---------- faq ---------- */
.faq{max-width:820px;margin:0 auto;display:grid;gap:14px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);overflow:hidden;
  transition:border-color 200ms var(--ease),background 200ms var(--ease);
}
.faq-item.open{border-color:var(--line-strong);background:rgba(31,200,212,.05)}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px 20px 26px;text-align:left;font-size:16px;font-weight:600;color:var(--text-1);
  min-height:44px;
}
.faq-q::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  opacity:0;transition:opacity 200ms var(--ease);
}
.faq-item.open .faq-q::before{opacity:1}
.faq-q svg{width:18px;height:18px;flex-shrink:0;stroke:var(--brand-soft);fill:none;stroke-width:1.6;transition:transform 220ms var(--ease)}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height 260ms var(--ease)}
.faq-a p{padding:0 22px 22px 26px;font-size:15px}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;isolation:isolate;overflow:hidden;
  background-image:linear-gradient(115deg,rgba(8,13,20,.92),rgba(8,13,20,.72)),url("/assets/images/backpic/back-2.webp");
  background-size:cover;background-position:center;
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.cta-inner{
  position:relative;z-index:2;display:flex;align-items:center;justify-content:space-between;
  gap:40px;padding:56px 40px;border-radius:var(--r-lg);
  background:rgba(12,22,34,.62);border:1px solid var(--line-strong);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  margin:88px 0;
}
.cta-inner h2{margin-bottom:10px}
.cta-inner p{font-size:15px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;flex-shrink:0}

/* ---------- footer ---------- */
.site-footer{background:var(--bg-1);border-top:1px solid var(--line);padding:64px 0 28px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:14px;color:var(--text-1);margin-bottom:16px;letter-spacing:.06em}
.footer-col p{font-size:14px;color:var(--text-3);max-width:34ch}
.footer-col ul{display:grid;gap:11px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand)}
.copyright{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  font-size:13px;color:var(--text-3);
}

/* ---------- responsive ---------- */
@media (max-width:1280px){
  .container{padding:0 24px}
}
@media (max-width:1024px){
  .section{padding:72px 0}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  .nav{
    position:fixed;top:72px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:4px;
    background:rgba(8,13,20,.98);
    border-bottom:1px solid var(--line-strong);
    padding:16px 24px 28px;
    max-height:0;overflow:hidden;opacity:0;visibility:hidden;
    transition:max-height 280ms var(--ease),opacity 220ms var(--ease),visibility 220ms var(--ease);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
  }
  .nav.open{max-height:420px;opacity:1;visibility:visible;overflow:auto}
  .nav-link{padding:14px 12px;font-size:16px;border-bottom:1px solid var(--line);border-radius:0}
  .nav-link::after{display:none}
  .nav-link.active{color:var(--brand-soft);background:rgba(31,200,212,.08)}
  .nav-cta-mobile{display:inline-flex;margin-top:16px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .media-band{grid-template-columns:1fr}
  .split{gap:28px}
  .cta-inner{flex-direction:column;align-items:flex-start;margin:72px 0;padding:40px 28px}
}
@media (max-width:768px){
  .section{padding:56px 0}
  .container{padding:0 16px}
  .hero{padding:56px 0 48px}
  .hero-metrics{gap:22px}
  .metric{min-width:calc(50% - 11px)}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .split{grid-template-columns:1fr}
  .btn{width:100%}
  .hero-actions .btn{width:100%}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%}
  .table-wrap{border:0;background:none;box-shadow:none;overflow:visible}
  .compare-table{min-width:0;display:block}
  .compare-table thead{display:none}
  .compare-table tbody,.compare-table tr,.compare-table td{display:block;width:100%}
  .compare-table tr{
    border:1px solid var(--line);border-radius:var(--r-md);
    background:var(--surface);margin-bottom:16px;padding:8px 16px 12px;
  }
  .compare-table td{
    padding:10px 0;display:flex;justify-content:space-between;gap:16px;
    border-bottom:1px dashed var(--line);font-size:14.5px;text-align:right;
  }
  .compare-table td:last-child{border-bottom:0}
  .compare-table td:first-child{
    display:block;text-align:left;font-size:15px;color:var(--text-1);
    padding:12px 0 10px;border-bottom:1px solid var(--line-strong);
  }
  .compare-table td::before{
    content:attr(data-label);color:var(--text-3);font-size:13px;
    flex-shrink:0;text-align:left;
  }
  .compare-table td:first-child::before{display:none}
  .cell-brand,.cell-violet,.cell-accent{background:rgba(255,255,255,.03) !important;border-radius:var(--r-sm)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .copyright{flex-direction:column}
}
@media (max-width:520px){
  .brand-text{font-size:16px}
  .footer-grid{grid-template-columns:1fr}
  .cta-inner{padding:32px 20px}
  .metric{min-width:100%}
  .faq-q{padding:18px 18px 18px 22px;font-size:15px}
  .faq-a p{padding:0 18px 18px 22px}
}

/* roulang page: category2 */
:root{
  --bg-0:#080D14;
  --bg-1:#0D1622;
  --bg-2:#101C29;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(12,22,34,.72);
  --line:rgba(120,200,190,.14);
  --line-strong:rgba(120,200,190,.28);
  --brand:#1FC8D4;
  --brand-2:#2FE0A8;
  --brand-strong:#12A9B6;
  --brand-soft:#8CF0F5;
  --accent:#FF8A4C;
  --accent-soft:#FFB78F;
  --violet:#7B6BFF;
  --text-1:#E9F3F2;
  --text-2:#A9BDC0;
  --text-3:#6E8388;
  --ok:#35D07F;
  --warn:#F5B942;
  --err:#FF5C5C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --sd-card:0 18px 40px -20px rgba(0,0,0,.35);
  --sd-glow-accent:0 0 0 1px rgba(255,138,76,.35),0 10px 30px -8px rgba(255,138,76,.55);
  --sd-glow-brand:0 0 0 1px rgba(31,200,212,.28),0 14px 38px -16px rgba(31,200,212,.5);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sp-1:4px;--sp-2:8px;--sp-3:12px;--sp-4:16px;--sp-5:24px;--sp-6:32px;--sp-7:48px;--sp-8:64px;--sp-9:88px;
  --pad-section:88px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;border-style:none}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand)}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;letter-spacing:.2px}
p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer;border:0;background:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
::selection{background:rgba(31,200,212,.3)}

h1{font-size:clamp(30px,5vw,52px);line-height:1.15;font-weight:800}
h2{font-size:clamp(24px,3.4vw,36px);line-height:1.25;font-weight:700}
h3{font-size:20px;line-height:1.4;font-weight:600}
.lede{font-size:17px;color:var(--text-2);max-width:68ch}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:var(--pad-section) 0;position:relative}
.section--alt{background:var(--bg-1);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--deep{background:var(--bg-2);border-top:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:var(--sp-7)}
.section-head p{margin-top:var(--sp-3)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:2px;color:var(--brand-soft);
  border:1px solid var(--line-strong);border-radius:var(--r-pill);
  padding:5px 14px;margin-bottom:var(--sp-4);background:var(--surface);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);box-shadow:0 0 10px var(--brand)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,13,20,.82);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.header-inner{height:72px;display:flex;align-items:center;gap:var(--sp-5)}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:30px;height:30px;border-radius:9px;flex-shrink:0;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 1px rgba(31,200,212,.35),0 8px 22px -10px rgba(31,200,212,.8);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:8px;border-radius:4px;
  background:linear-gradient(135deg,rgba(8,13,20,.9),rgba(8,13,20,.25));
}
.brand-name{color:var(--text-1);font-weight:800;font-size:18px;letter-spacing:1px}
.nav{margin-left:auto;display:flex;align-items:center;gap:4px}
.nav-link{
  position:relative;padding:10px 14px;font-size:15px;color:var(--text-2);
  border-radius:var(--r-sm);line-height:1.2;min-height:44px;display:inline-flex;align-items:center;
}
.nav-link:hover{color:var(--brand);background:rgba(31,200,212,.07)}
.nav-link.active{color:var(--text-1);font-weight:600}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.nav-cta{
  margin-left:var(--sp-3);
  padding:11px 22px;border-radius:var(--r-pill);font-size:15px;font-weight:700;
  color:#1A0C04;background:linear-gradient(135deg,var(--accent),var(--accent-soft));
  box-shadow:var(--sd-glow-accent);min-height:44px;display:inline-flex;align-items:center;
  white-space:nowrap;transition:transform .18s var(--ease),box-shadow .18s var(--ease);
}
.nav-cta:hover{color:#1A0C04;transform:translateY(-2px)}
.nav-cta:active{transform:translateY(0)}
.nav-toggle{
  display:none;margin-left:auto;width:46px;height:46px;border-radius:var(--r-sm);
  border:1px solid var(--line-strong);background:var(--surface);align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-1);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);border-radius:2px;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 26px;border-radius:var(--r-pill);font-size:16px;font-weight:600;
  min-height:48px;white-space:nowrap;transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease);
}
.btn-primary{
  color:#1A0C04;background:linear-gradient(135deg,var(--accent),var(--accent-soft));
  box-shadow:var(--sd-glow-accent);
}
.btn-primary:hover{color:#1A0C04;transform:translateY(-2px)}
.btn-secondary{
  color:var(--brand-soft);border:1px solid var(--line-strong);background:transparent;
}
.btn-secondary:hover{color:var(--brand-soft);background:rgba(31,200,212,.08);border-color:var(--brand);transform:translateY(-2px)}
.btn-ghost{color:var(--brand-soft);padding:8px 0;min-height:44px}
.btn-ghost svg{transition:transform .2s var(--ease)}
.btn-ghost:hover{color:var(--brand)}
.btn-ghost:hover svg{transform:translateX(4px)}
.btn[disabled]{filter:saturate(.4);box-shadow:none;cursor:not-allowed;transform:none}
.btn:active{transform:translateY(0)}

/* ---------- 内页头部 ---------- */
.page-hero{
  position:relative;overflow:hidden;
  padding:76px 0 72px;
  background:
    linear-gradient(180deg,rgba(8,13,20,.92) 0%,rgba(8,13,20,.78) 45%,rgba(8,13,20,.95) 100%),
    url("/assets/images/backpic/back-2.webp") center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.page-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg,rgba(31,200,212,.16) 0%,rgba(31,200,212,0) 45%,rgba(255,138,76,.12) 100%);
}
.page-hero .container{position:relative;z-index:2}
.breadcrumb{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-3);margin-bottom:var(--sp-5);flex-wrap:wrap}
.breadcrumb a{color:var(--text-2)}
.breadcrumb span.sep{color:var(--text-3)}
.breadcrumb .current{color:var(--brand-soft)}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:var(--sp-8);align-items:center}
.page-hero h1{margin-bottom:var(--sp-4)}
.page-hero h1 em{font-style:normal;background:linear-gradient(120deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-actions{display:flex;flex-wrap:wrap;gap:var(--sp-4);margin-top:var(--sp-6)}
.hero-stats{display:flex;gap:var(--sp-7);margin-top:var(--sp-7);flex-wrap:wrap}
.hero-stats .stat b{display:block;font-size:30px;font-weight:800;color:var(--accent);line-height:1.2}
.hero-stats .stat span{font-size:13px;color:var(--text-3)}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line-strong);
  box-shadow:var(--sd-glow-brand);
  aspect-ratio:16/10;background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.hero-media img{width:100%;height:100%;object-fit:cover}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,13,20,.25),rgba(8,13,20,.65));
}
.hero-badge{
  position:absolute;left:20px;bottom:20px;z-index:3;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:var(--r-pill);font-size:13px;color:var(--text-1);
  background:var(--surface-2);border:1px solid var(--line-strong);
  backdrop-filter:blur(16px) saturate(140%);
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 10px var(--brand-2);display:block}

/* ---------- 图文交替 ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-8);align-items:center;
  padding:var(--sp-7) 0;
}
.split + .split{border-top:1px dashed var(--line)}
.split-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);background:var(--bg-2);
  aspect-ratio:16/10;box-shadow:var(--sd-card);
}
.split-media img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.split:hover .split-media img{transform:scale(1.03)}
.split-media .tag-float{
  position:absolute;top:16px;left:16px;z-index:2;
  padding:6px 14px;border-radius:var(--r-pill);font-size:12px;color:var(--text-1);
  background:var(--surface-2);border:1px solid var(--line-strong);
  backdrop-filter:blur(14px);
}
.split-copy h2{margin-bottom:var(--sp-4)}
.split-copy p + p{margin-top:var(--sp-4)}
.check-list{margin-top:var(--sp-5);display:grid;gap:var(--sp-3)}
.check-list li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.check-list li::before{
  content:"";flex:0 0 auto;width:18px;height:18px;margin-top:5px;border-radius:6px;
  background:linear-gradient(135deg,rgba(31,200,212,.9),rgba(47,224,168,.9));
  box-shadow:0 0 0 1px rgba(31,200,212,.35);
  mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat;
  -webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='3.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center/12px no-repeat;
}
.split.reverse .split-media{order:2}

/* ---------- 非等宽要点卡 2:1:1 ---------- */
.feature-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:var(--sp-5)}
.feature-card{
  position:relative;padding:var(--sp-6);
  border-radius:var(--r-lg);border:1px solid var(--line);
  background:linear-gradient(180deg,var(--surface),rgba(12,22,34,.55));
  backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--sd-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
  display:flex;flex-direction:column;
}
.feature-card::before{
  content:"";position:absolute;inset:0 0 auto 0;height:1px;border-radius:var(--r-lg) var(--r-lg) 0 0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
}
.feature-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.feature-card .fnum{font-size:13px;color:var(--text-3);letter-spacing:2px;margin-bottom:var(--sp-4)}
.feature-card h3{margin-bottom:var(--sp-3)}
.feature-card p{font-size:15px}
.feature-card.wide h3{font-size:24px}
.feature-card.wide{margin-bottom:0}
.feature-card .fmeta{margin-top:auto;padding-top:var(--sp-5);font-size:13px;color:var(--text-3)}
.chip{
  display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;border:1px solid var(--line-strong);color:var(--brand-soft);background:rgba(31,200,212,.08);
}
.chip.violet{color:#C4BCFF;border-color:rgba(123,107,255,.35);background:rgba(123,107,255,.12)}
.chip.accent{color:var(--accent-soft);border-color:rgba(255,138,76,.35);background:rgba(255,138,76,.1)}

/* ---------- 模板库网格 ---------- */
.tpl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--sp-5)}
.tpl-card{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  background:var(--bg-2);box-shadow:var(--sd-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
  display:flex;flex-direction:column;
}
.tpl-card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.tpl-thumb{position:relative;aspect-ratio:16/9;background:linear-gradient(135deg,var(--brand-strong),var(--brand-2));overflow:hidden}
.tpl-thumb img{width:100%;height:100%;object-fit:cover}
.tpl-thumb .tpl-tag{
  position:absolute;top:12px;left:12px;padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;color:var(--text-1);background:rgba(8,13,20,.7);border:1px solid var(--line-strong);
  backdrop-filter:blur(12px);
}
.tpl-body{padding:var(--sp-5);display:flex;flex-direction:column;gap:var(--sp-3);flex:1}
.tpl-body h3{font-size:18px}
.tpl-body p{font-size:14px;color:var(--text-2)}
.tpl-body .tpl-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:var(--sp-3);border-top:1px solid var(--line);font-size:13px;color:var(--text-3)}

/* ---------- 规范/数据板块 ---------- */
.spec-wrap{display:grid;grid-template-columns:5fr 7fr;gap:var(--sp-8);align-items:start}
.spec-list{display:grid;gap:var(--sp-4)}
.spec-item{
  display:grid;grid-template-columns:44px 1fr;gap:var(--sp-4);
  padding:var(--sp-5);border-radius:var(--r-md);
  border:1px solid var(--line);background:var(--surface);
  transition:border-color .2s var(--ease),transform .2s var(--ease);
}
.spec-item:hover{border-color:var(--line-strong);transform:translateY(-3px)}
.spec-item .ico{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,rgba(31,200,212,.2),rgba(47,224,168,.12));
  border:1px solid var(--line-strong);color:var(--brand-soft);
}
.spec-item h3{font-size:17px;margin-bottom:6px}
.spec-item p{font-size:14px}
.metric-panel{
  border-radius:var(--r-lg);border:1px solid var(--line-strong);
  background:linear-gradient(160deg,rgba(31,200,212,.1),rgba(123,107,255,.08) 55%,rgba(255,138,76,.08));
  padding:var(--sp-6);box-shadow:var(--sd-card);
}
.metric-panel h3{font-size:18px;margin-bottom:var(--sp-5)}
.metric-row{display:flex;align-items:baseline;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px dashed var(--line)}
.metric-row:last-child{border-bottom:0}
.metric-row span{font-size:14px;color:var(--text-2)}
.metric-row b{font-size:22px;color:var(--accent);font-weight:800}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);margin-bottom:var(--sp-3);overflow:hidden;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item.open{border-color:var(--line-strong);background:rgba(31,200,212,.05)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 20px 18px 24px;text-align:left;font-size:16px;font-weight:600;color:var(--text-1);
  min-height:56px;position:relative;
}
.faq-item.open .faq-q::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
}
.faq-q .caret{
  flex:0 0 auto;width:22px;height:22px;display:grid;place-items:center;color:var(--brand-soft);
  transition:transform .24s var(--ease);
}
.faq-item.open .caret{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 24px 20px;font-size:15px;color:var(--text-2)}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:
    linear-gradient(120deg,rgba(8,13,20,.9) 0%,rgba(8,13,20,.72) 100%),
    url("/assets/images/backpic/back-3.png") center/cover no-repeat;
  padding:var(--sp-8);
  display:grid;grid-template-columns:1.35fr 1fr;gap:var(--sp-7);align-items:center;
  box-shadow:var(--sd-card);
}
.cta-band h2{margin-bottom:var(--sp-4)}
.cta-band .cta-actions{display:flex;flex-direction:column;gap:var(--sp-4);align-items:stretch}
.cta-note{font-size:13px;color:var(--text-3);text-align:center}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);
  background:var(--bg-1);
  padding:var(--sp-8) 0 var(--sp-5);
  margin-top:var(--sp-9);
}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:var(--sp-7)}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:var(--sp-4)}
.footer-col h4{font-size:15px;margin-bottom:var(--sp-4);color:var(--text-1)}
.footer-col p{font-size:14px;color:var(--text-2);max-width:42ch}
.footer-col ul{display:grid;gap:10px}
.footer-col ul li a{font-size:14px;color:var(--text-2);min-height:32px;display:inline-flex;align-items:center}
.footer-col ul li a:hover{color:var(--brand)}
.copyright{
  margin-top:var(--sp-7);padding-top:var(--sp-5);border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:var(--text-3);
}

/* ---------- 移动端抽屉 ---------- */
.drawer{
  position:fixed;inset:0;z-index:80;display:none;
}
.drawer.open{display:block}
.drawer-mask{position:absolute;inset:0;background:rgba(4,8,12,.7);backdrop-filter:blur(4px)}
.drawer-panel{
  position:absolute;top:0;right:0;bottom:0;width:min(84vw,340px);
  background:var(--bg-1);border-left:1px solid var(--line-strong);
  padding:var(--sp-6) var(--sp-5);
  display:flex;flex-direction:column;gap:6px;
  animation:drawerIn .24s var(--ease);
}
@keyframes drawerIn{from{transform:translateX(20px);opacity:.4}to{transform:translateX(0);opacity:1}}
.drawer-panel .drawer-title{font-size:13px;letter-spacing:2px;color:var(--text-3);margin-bottom:var(--sp-4)}
.drawer-panel a{
  padding:14px 16px;border-radius:var(--r-md);font-size:16px;color:var(--text-2);
  border:1px solid transparent;min-height:48px;display:flex;align-items:center;
}
.drawer-panel a:hover{background:rgba(31,200,212,.08);color:var(--brand)}
.drawer-panel a.active{color:var(--text-1);border-color:var(--line-strong);background:var(--surface)}
.drawer-panel .drawer-cta{margin-top:var(--sp-5)}
.drawer-close{
  position:absolute;top:18px;right:18px;width:42px;height:42px;border-radius:var(--r-sm);
  border:1px solid var(--line-strong);color:var(--text-2);display:grid;place-items:center;background:var(--surface);
}

/* ---------- 响应式 ---------- */
@media (max-width:1280px){
  .container{max-width:1140px}
}
@media (max-width:1024px){
  :root{--pad-section:72px}
  .nav{display:none}
  .nav-cta{display:none}
  .nav-toggle{display:inline-flex}
  .hero-grid,.split,.spec-wrap,.cta-band{grid-template-columns:1fr}
  .split.reverse .split-media{order:0}
  .hero-stats{gap:var(--sp-6)}
  .tpl-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:1fr 1fr}
  .feature-card.wide{grid-column:1 / -1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:var(--sp-6)}
}
@media (max-width:768px){
  :root{--pad-section:56px}
  .container{padding:0 16px}
  .header-inner{height:64px}
  .brand-name{font-size:16px}
  .page-hero{padding:56px 0 52px}
  .feature-grid{grid-template-columns:1fr}
  .tpl-grid{grid-template-columns:1fr}
  .hero-actions .btn{flex:1 1 auto}
  .cta-band{padding:var(--sp-6)}
  .footer-grid{grid-template-columns:1fr}
  .copyright{flex-direction:column;gap:6px}
  .hero-stats .stat b{font-size:26px}
  .metric-row b{font-size:20px}
}
@media (max-width:520px){
  h1{font-size:29px}
  .btn{padding:13px 20px;font-size:15px}
  .hero-actions{flex-direction:column}
  .hero-actions .btn{width:100%}
  .split-media{aspect-ratio:4/3}
}

/* roulang page: category3 */
:root{
  --bg-0:#080D14;
  --bg-1:#0D1622;
  --bg-2:#101C29;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(12,22,34,.72);
  --line:rgba(120,200,190,.14);
  --line-strong:rgba(120,200,190,.28);
  --brand:#1FC8D4;
  --brand-2:#2FE0A8;
  --brand-strong:#12A9B6;
  --brand-soft:#8CF0F5;
  --accent:#FF8A4C;
  --accent-soft:#FFB78F;
  --violet:#7B6BFF;
  --text-1:#E9F3F2;
  --text-2:#A9BDC0;
  --text-3:#6E8388;
  --ok:#35D07F;
  --warn:#F5B942;
  --err:#FF5C5C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.35);
  --shadow-accent:0 0 0 1px rgba(255,138,76,.35),0 10px 30px -8px rgba(255,138,76,.55);
  --shadow-brand:0 0 0 1px rgba(31,200,212,.30),0 12px 34px -16px rgba(31,200,212,.55);
  --ease:cubic-bezier(.2,.7,.3,1);
  --sp-1:4px; --sp-2:8px; --sp-3:12px; --sp-4:16px; --sp-5:24px;
  --sp-6:32px; --sp-7:48px; --sp-8:64px; --sp-9:96px;
  --font-zh:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-zh);
  font-size:16px;
  line-height:1.85;
  color:var(--text-2);
  background:
    radial-gradient(1100px 520px at 82% -12%,rgba(31,200,212,.13),transparent 62%),
    radial-gradient(760px 420px at 4% 8%,rgba(123,107,255,.10),transparent 60%),
    var(--bg-0);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto;}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease);}
a:hover{color:var(--brand-soft);}
button{font-family:inherit;}
ul,ol{margin:0;padding:0;list-style:none;}
h1,h2,h3,h4{color:var(--text-1);margin:0;font-weight:700;letter-spacing:.01em;}
p{margin:0;}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px;}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
.section{padding:88px 0;position:relative;}
.section--alt{background:linear-gradient(180deg,rgba(13,22,34,.92),rgba(8,13,20,.92));border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-head{max-width:760px;margin-bottom:48px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--brand-soft);font-weight:600;
}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--brand),var(--brand-2));}
h1{font-size:clamp(30px,5vw,52px);line-height:1.15;font-weight:800;}
h2{font-size:clamp(24px,3.4vw,36px);line-height:1.25;font-weight:700;}
h3{font-size:20px;line-height:1.4;font-weight:600;}
.section-head p{margin-top:16px;max-width:64ch;color:var(--text-2);}
.section-head.center p{margin-left:auto;margin-right:auto;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 24px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;line-height:1.2;white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),box-shadow .18s var(--ease),border-color .18s var(--ease);
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{
  background:linear-gradient(135deg,var(--accent),var(--accent-soft));
  color:#1B0F07;box-shadow:var(--shadow-accent);
}
.btn-primary:hover{color:#1B0F07;transform:translateY(-2px);}
.btn-primary:active{transform:translateY(0);}
.btn-outline{
  background:transparent;color:var(--brand-soft);
  border-color:var(--line-strong);
  box-shadow:inset 0 0 0 0 rgba(31,200,212,0);
}
.btn-outline:hover{background:rgba(31,200,212,.08);color:var(--brand-soft);border-color:var(--brand);transform:translateY(-2px);}
.btn-ghost{
  background:transparent;color:var(--brand-soft);padding:10px 4px;
  border-radius:6px;
}
.btn-ghost:hover{color:var(--text-1);}
.btn-ghost:hover .arrow{transform:translateX(4px);}
.arrow{transition:transform .18s var(--ease);}
.btn[disabled],.btn.is-disabled{opacity:.55;filter:saturate(.6);box-shadow:none;cursor:not-allowed;}

/* 头部导航 */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,13,20,.82);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(8,13,20,.94);}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;height:72px;}
.brand{display:inline-flex;align-items:center;gap:10px;color:var(--text-1);font-weight:700;}
.brand:hover{color:var(--text-1);}
.brand-mark{
  width:26px;height:26px;border-radius:9px;flex:0 0 auto;
  background:linear-gradient(135deg,var(--brand),var(--brand-2) 55%,var(--violet));
  box-shadow:0 0 18px -4px rgba(31,200,212,.8);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;inset:7px 6px auto 6px;height:2px;border-radius:2px;
  background:rgba(8,13,20,.72);
}
.brand-text{font-size:17px;letter-spacing:.02em;}
.nav{display:flex;align-items:center;gap:4px;}
.nav-link{
  position:relative;padding:8px 14px;border-radius:var(--r-pill);
  font-size:15px;color:var(--text-2);font-weight:500;
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link:hover{color:var(--brand);background:rgba(31,200,212,.07);}
.nav-link.active{color:var(--text-1);font-weight:600;}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:1px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.header-actions{display:flex;align-items:center;gap:12px;}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-md);
  background:var(--surface);border:1px solid var(--line);color:var(--text-1);
  align-items:center;justify-content:center;cursor:pointer;
}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;position:relative;}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor;border-radius:2px;
}
.nav-toggle span::before{top:-6px;}
.nav-toggle span::after{top:6px;}
.mobile-nav{
  display:none;flex-direction:column;gap:4px;
  padding:8px 24px 20px;
  border-top:1px solid var(--line);
  background:rgba(8,13,20,.97);
}
.mobile-nav.open{display:flex;}
.mobile-nav .nav-link{padding:12px 14px;border-radius:var(--r-md);}
.mobile-nav .nav-link.active::after{display:none;}
.mobile-nav .nav-link.active{background:rgba(31,200,212,.10);}
.mobile-nav .btn{margin-top:8px;}

/* 首屏 */
.hero{
  position:relative;overflow:hidden;
  padding:96px 0 88px;
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-1;
  background-image:url(/assets/images/backpic/back-2.webp);
  background-size:cover;background-position:center;
  opacity:.42;
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    linear-gradient(100deg,rgba(8,13,20,.94) 0%,rgba(8,13,20,.86) 46%,rgba(8,13,20,.66) 100%),
    radial-gradient(700px 320px at 78% 22%,rgba(31,200,212,.20),transparent 66%);
}
.hero-grid{display:grid;grid-template-columns:7fr 5fr;gap:56px;align-items:center;}
.hero h1{margin-top:20px;}
.hero h1 .hl{
  background:linear-gradient(100deg,var(--brand),var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero-sub{margin-top:22px;font-size:17px;max-width:56ch;color:var(--text-2);}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;}
.hero-stats{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:20px;margin-top:44px;padding-top:28px;border-top:1px solid var(--line);
}
.stat-num{font-size:26px;font-weight:800;color:var(--accent);line-height:1.2;letter-spacing:.01em;}
.stat-label{font-size:13px;color:var(--text-3);margin-top:4px;}
.hero-media{
  position:relative;border-radius:var(--r-lg);overflow:hidden;
  border:1px solid var(--line);
  box-shadow:0 0 0 1px rgba(31,200,212,.12),0 30px 60px -30px rgba(31,200,212,.55);
  aspect-ratio:16/11;background:var(--bg-2);
}
.hero-media img{width:100%;height:100%;object-fit:cover;}
.hero-media::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(8,13,20,.18) 0%,rgba(8,13,20,.62) 100%);
}
.hero-badge{
  position:absolute;left:20px;bottom:20px;z-index:2;
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 16px;border-radius:var(--r-pill);
  background:var(--surface-2);border:1px solid var(--line-strong);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  font-size:13px;color:var(--text-1);
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 12px var(--brand-2);flex:0 0 auto;}

/* 流程时间轴 */
.timeline{position:relative;max-width:880px;margin:0 auto;}
.step{
  position:relative;display:grid;grid-template-columns:64px minmax(0,1fr);
  gap:24px;padding-bottom:40px;
}
.step:last-child{padding-bottom:0;}
.step:not(:last-child)::before{
  content:"";position:absolute;left:31px;top:64px;bottom:8px;width:1px;
  background:linear-gradient(180deg,var(--line-strong),rgba(120,200,190,.06));
}
.step-marker{
  width:64px;height:64px;border-radius:var(--r-md);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:800;color:var(--brand-soft);
  background:linear-gradient(150deg,rgba(31,200,212,.18),rgba(47,224,168,.06));
  border:1px solid var(--line-strong);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.06);
}
.step-body{
  padding:22px 26px;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.step:hover .step-body{transform:translateY(-4px);border-color:var(--line-strong);}
.step-body h3{font-size:19px;}
.step-body p{margin-top:10px;}
.step-points{margin-top:16px;display:grid;gap:8px;}
.step-points li{position:relative;padding-left:20px;font-size:14.5px;color:var(--text-2);}
.step-points li::before{
  content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:2px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}

/* 速查卡 */
.check-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;}
.info-card{
  padding:26px 24px;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);
  box-shadow:var(--shadow-card),inset 0 1px 0 rgba(255,255,255,.05);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.info-card:hover{transform:translateY(-4px);border-color:rgba(31,200,212,.3);}
.info-card h3{font-size:18px;}
.info-card p{margin-top:10px;font-size:15px;}
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 12px;border-radius:var(--r-pill);font-size:12.5px;font-weight:600;
  border:1px solid var(--line-strong);color:var(--brand-soft);background:rgba(31,200,212,.08);
  margin-bottom:14px;
}
.tag-violet{color:#C3BBFF;background:rgba(123,107,255,.12);border-color:rgba(123,107,255,.34);}
.tag-accent{color:var(--accent-soft);background:rgba(255,138,76,.10);border-color:rgba(255,138,76,.32);}

/* 图文块 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center;}
.split-media{
  border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line);
  box-shadow:0 0 0 1px rgba(31,200,212,.10),0 30px 60px -34px rgba(31,200,212,.5);
  aspect-ratio:16/11;background:var(--bg-2);
}
.split-media img{width:100%;height:100%;object-fit:cover;}
.split-body h2{margin-bottom:16px;}
.split-list{margin-top:24px;display:grid;gap:14px;}
.split-list li{
  display:grid;grid-template-columns:26px minmax(0,1fr);gap:12px;
  padding:14px 16px;border-radius:var(--r-md);
  background:var(--surface);border:1px solid var(--line);
}
.split-list .num{
  width:22px;height:22px;border-radius:50%;margin-top:3px;
  display:flex;align-items:center;justify-content:center;
  font-size:12px;font-weight:700;color:#08131A;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.split-list strong{display:block;color:var(--text-1);font-size:15.5px;font-weight:600;}
.split-list span.desc{font-size:14px;color:var(--text-2);}

/* 误区列表 */
.myth-list{display:grid;gap:16px;}
.myth-item{
  display:grid;grid-template-columns:120px minmax(0,1fr);gap:20px;
  padding:22px 24px;border-radius:var(--r-lg);
  background:var(--surface);border:1px solid var(--line);
  border-left:3px solid rgba(255,92,92,.5);
  transition:transform .2s var(--ease),border-color .2s var(--ease);
}
.myth-item:hover{transform:translateY(-3px);border-left-color:var(--accent);}
.myth-label{
  align-self:start;
  display:inline-flex;align-items:center;justify-content:center;
  padding:6px 12px;border-radius:var(--r-pill);
  font-size:12.5px;font-weight:700;letter-spacing:.06em;
  color:var(--warn);background:rgba(245,185,66,.10);
  border:1px solid rgba(245,185,66,.30);
  white-space:nowrap;
}
.myth-item h3{font-size:17.5px;}
.myth-item p{margin-top:10px;font-size:15px;}
.myth-fix{
  margin-top:12px;padding:12px 14px;border-radius:var(--r-md);
  background:rgba(53,208,127,.07);border:1px solid rgba(53,208,127,.22);
  font-size:14.5px;color:var(--text-1);
}
.myth-fix b{color:var(--ok);font-weight:700;margin-right:6px;}

/* FAQ */
.faq{max-width:820px;margin:0 auto;display:grid;gap:12px;}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);overflow:hidden;position:relative;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item:hover{border-color:var(--line-strong);}
.faq-item::before{
  content:"";position:absolute;left:0;top:0;bottom:0;width:3px;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  opacity:0;transition:opacity .2s var(--ease);
}
.faq-item.open{border-color:var(--line-strong);background:rgba(255,255,255,.06);}
.faq-item.open::before{opacity:1;}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;background:none;border:0;cursor:pointer;text-align:left;
  font-size:16.5px;font-weight:600;color:var(--text-1);
}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;position:relative;
  transition:transform .22s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:4px;top:10px;width:14px;height:2px;border-radius:2px;
  background:var(--brand-soft);
}
.faq-icon::after{transform:rotate(90deg);}
.faq-item.open .faq-icon{transform:rotate(180deg);}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .28s var(--ease);
}
.faq-item.open .faq-a{max-height:360px;}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--text-2);}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;
  border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(16,28,41,.96),rgba(8,13,20,.96));
  padding:56px 48px;
  box-shadow:0 40px 80px -50px rgba(31,200,212,.6);
}
.cta-band::before{
  content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(31,200,212,.22),transparent 66%);
}
.cta-band::after{
  content:"";position:absolute;left:-80px;bottom:-140px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,76,.18),transparent 68%);
}
.cta-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;}
.cta-inner h2{font-size:clamp(22px,2.8vw,30px);}
.cta-inner p{margin-top:14px;max-width:46ch;}
.form-grid{display:grid;gap:14px;}
.field{display:grid;gap:8px;}
.field label{font-size:14px;color:var(--text-2);}
.field input,.field select{
  width:100%;padding:13px 15px;border-radius:var(--r-md);
  background:rgba(255,255,255,.05);
  border:1px solid var(--line);
  color:var(--text-1);font-size:15px;font-family:inherit;
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease);
  appearance:none;
}
.field input::placeholder{color:var(--text-3);}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--brand);
  box-shadow:0 0 0 2px rgba(31,200,212,.35);
  background:rgba(31,200,212,.06);
}
.field select option{background:#0D1622;color:var(--text-1);}
.field-hint{font-size:12.5px;color:var(--text-3);}
.form-actions{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:6px;}
.form-note{font-size:12.5px;color:var(--text-3);}

/* 页脚 */
.site-footer{
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(8,13,20,.6),rgba(8,13,20,1));
  padding:64px 0 28px;
}
.footer-grid{
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px;}
.footer-col p{font-size:14.5px;color:var(--text-3);max-width:34ch;}
.footer-col h4{font-size:14px;color:var(--text-1);letter-spacing:.06em;margin-bottom:16px;}
.footer-col ul{display:grid;gap:10px;}
.footer-col ul a{font-size:14.5px;color:var(--text-2);}
.footer-col ul a:hover{color:var(--brand);}
.copyright{
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13.5px;color:var(--text-3);
}

/* 响应式 */
@media (max-width:1024px){
  .nav{display:none;}
  .nav-toggle{display:flex;}
  .hero-grid{grid-template-columns:1fr;gap:40px;}
  .hero-media{max-width:560px;}
  .split{grid-template-columns:1fr;gap:32px;}
  .check-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
  .cta-inner{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:32px;}
  .footer-col:last-child{grid-column:1 / -1;}
  .section{padding:72px 0;}
}
@media (max-width:768px){
  .container{padding:0 16px;}
  .header-actions .btn-primary{display:none;}
  .hero{padding:64px 0 56px;}
  .hero-stats{grid-template-columns:1fr;gap:14px;}
  .stat-num{font-size:23px;}
  .hero-cta .btn{width:100%;}
  .step{grid-template-columns:1fr;gap:14px;}
  .step:not(:last-child)::before{display:none;}
  .step-marker{width:52px;height:52px;font-size:16px;border-radius:var(--r-md);}
  .check-grid{grid-template-columns:1fr;}
  .myth-item{grid-template-columns:1fr;gap:12px;}
  .myth-label{justify-self:start;}
  .cta-band{padding:36px 22px;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px;}
  .section{padding:56px 0;}
  .section-head{margin-bottom:32px;}
  .btn{white-space:normal;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;}
  .form-actions .btn{width:100%;}
  .copyright{flex-direction:column;}
  .split-list li{grid-template-columns:1fr;}
  .split-list .num{margin-top:0;}
}

/* roulang page: category4 */
:root{
  --bg-0:#080D14;
  --bg-1:#0D1622;
  --bg-2:#101C29;
  --surface:rgba(255,255,255,.045);
  --surface-2:rgba(12,22,34,.72);
  --line:rgba(120,200,190,.14);
  --line-strong:rgba(120,200,190,.28);
  --brand:#1FC8D4;
  --brand-2:#2FE0A8;
  --brand-strong:#12A9B6;
  --brand-soft:#8CF0F5;
  --accent:#FF8A4C;
  --accent-soft:#FFB78F;
  --violet:#7B6BFF;
  --text-1:#E9F3F2;
  --text-2:#A9BDC0;
  --text-3:#6E8388;
  --ok:#35D07F;
  --warn:#F5B942;
  --err:#FF5C5C;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-card:0 18px 40px -20px rgba(0,0,0,.35);
  --shadow-accent:0 0 0 1px rgba(255,138,76,.35),0 10px 30px -8px rgba(255,138,76,.55);
  --shadow-brand:0 0 0 1px rgba(31,200,212,.28),0 12px 30px -14px rgba(31,200,212,.6);
  --container:1200px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg-0);
  color:var(--text-2);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;border-style:none}
a{color:var(--brand);text-decoration:none;transition:color .18s var(--ease)}
a:hover{color:var(--brand-soft)}
h1,h2,h3,h4{margin:0;color:var(--text-1);font-weight:700;line-height:1.3;letter-spacing:.2px}
h1{font-size:clamp(30px,5vw,52px);line-height:1.15;font-weight:800}
h2{font-size:clamp(24px,3.4vw,36px);line-height:1.25}
h3{font-size:20px;line-height:1.4;font-weight:600}
p{margin:0 0 16px;max-width:68ch}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:4px}
::selection{background:rgba(31,200,212,.28);color:#fff}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:88px 0;border-top:1px solid var(--line)}
.section--alt{background:var(--bg-1)}
.section--deep{background:linear-gradient(180deg,var(--bg-1),var(--bg-2))}
.section-head{max-width:760px;margin-bottom:48px}
.section-head p{margin-top:14px;font-size:16px;color:var(--text-2)}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand-soft);margin-bottom:16px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:linear-gradient(90deg,var(--brand),transparent)}
.lead{font-size:17px;color:var(--text-2);max-width:62ch}

/* ---------- header / nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(8,13,20,.72);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:72px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--text-1);font-weight:700;font-size:18px;letter-spacing:.5px}
.brand:hover{color:var(--text-1)}
.brand-mark{
  position:relative;width:28px;height:28px;border-radius:9px;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  box-shadow:0 0 0 1px rgba(31,200,212,.35),0 8px 22px -10px rgba(31,200,212,.75);
}
.brand-mark::after{content:"";position:absolute;inset:8px;border-radius:4px;background:rgba(8,13,20,.86)}
.nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;padding:0 14px;
  border-radius:var(--r-pill);font-size:15px;color:var(--text-2);
  transition:color .18s var(--ease),background .18s var(--ease);
}
.nav-link:hover{color:var(--brand);background:rgba(31,200,212,.07)}
.nav-link.active{color:var(--text-1);background:rgba(31,200,212,.08)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,var(--brand),var(--brand-2));
}
.header-cta{margin-left:14px}
.nav-toggle{
  display:none;width:44px;height:44px;margin-left:auto;
  align-items:center;justify-content:center;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--text-1);border-radius:2px;position:relative;transition:.2s var(--ease)}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--text-1);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:600;color:var(--text-1);white-space:nowrap;
  border:1px solid transparent;cursor:pointer;
  transition:transform .18s var(--ease),box-shadow .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn-accent{
  background:linear-gradient(135deg,var(--accent),var(--accent-soft));
  color:#231007;box-shadow:var(--shadow-accent);
}
.btn-accent:hover{color:#231007;transform:translateY(-2px);box-shadow:0 0 0 1px rgba(255,138,76,.45),0 16px 34px -10px rgba(255,138,76,.7)}
.btn-accent:active{transform:translateY(0)}
.btn-ghost{
  background:transparent;border-color:var(--line-strong);color:var(--text-1);
}
.btn-ghost:hover{background:rgba(31,200,212,.08);border-color:var(--brand);color:var(--text-1)}
.btn-text{
  display:inline-flex;align-items:center;gap:6px;padding:0;background:none;border:0;
  color:var(--brand);font-weight:600;font-size:15px;
}
.btn-text svg{transition:transform .2s var(--ease)}
.btn-text:hover svg{transform:translateX(4px)}
.btn[disabled],.btn.is-disabled{filter:saturate(.4);box-shadow:none;cursor:not-allowed;transform:none}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:96px 0 84px;
  background:
    linear-gradient(180deg,rgba(8,13,20,.74),rgba(8,13,20,.94)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom:1px solid var(--line);
}
.hero::after{
  content:"";position:absolute;right:-14%;top:-30%;width:52%;height:150%;
  background:linear-gradient(120deg,rgba(31,200,212,.16),rgba(47,224,168,.05) 45%,transparent 70%);
  transform:rotate(8deg);pointer-events:none;
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.crumbs{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-3);margin-bottom:22px}
.crumbs a{color:var(--text-3)}
.crumbs a:hover{color:var(--brand)}
.crumbs span.sep{opacity:.5}
.hero h1{margin-bottom:20px}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,var(--brand),var(--brand-2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17px;color:var(--text-2);max-width:56ch;margin-bottom:30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px}
.stats{display:flex;flex-wrap:wrap;gap:40px}
.stat-num{font-size:30px;font-weight:800;color:var(--accent);line-height:1.1;letter-spacing:.5px}
.stat-label{font-size:13px;color:var(--text-3);margin-top:6px}
.hero-media{position:relative;border-radius:var(--r-lg);overflow:hidden;border:1px solid var(--line-strong);box-shadow:0 0 0 1px rgba(31,200,212,.12),0 30px 70px -30px rgba(0,0,0,.85)}
.hero-media img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-media .media-cap{
  position:absolute;left:16px;right:16px;bottom:16px;
  padding:14px 16px;border-radius:var(--r-md);
  background:var(--surface-2);backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--line);font-size:13px;color:var(--text-2);
  display:flex;align-items:center;gap:10px;
}
.dot{width:8px;height:8px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 12px rgba(47,224,168,.9);flex:0 0 auto}

/* ---------- cards / grids ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.card{
  position:relative;display:flex;flex-direction:column;
  padding:24px;border-radius:var(--r-lg);
  background:linear-gradient(180deg,var(--surface),rgba(255,255,255,.015));
  border:1px solid var(--line);
  backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
  box-shadow:var(--shadow-card);
  transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
}
.card::before{
  content:"";position:absolute;left:18px;right:18px;top:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.22),transparent);
}
.card:hover{transform:translateY(-4px);border-color:rgba(31,200,212,.3);box-shadow:0 24px 50px -24px rgba(0,0,0,.6)}
.card h3{margin-bottom:10px}
.card p{font-size:15px;margin-bottom:0}
.card-media{
  position:relative;margin:-24px -24px 20px;border-radius:var(--r-lg) var(--r-lg) 0 0;overflow:hidden;
  background:linear-gradient(135deg,#0E2A33,#10303A);
}
.card-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s var(--ease)}
.card:hover .card-media img{transform:scale(1.04)}
.media-fallback{
  display:flex;align-items:center;justify-content:center;
  aspect-ratio:16/9;font-size:34px;font-weight:800;color:rgba(233,243,242,.55);
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;letter-spacing:.04em;
  border:1px solid var(--line-strong);color:var(--brand-soft);background:rgba(31,200,212,.08);
}
.badge--violet{color:#C6C0FF;border-color:rgba(123,107,255,.35);background:rgba(123,107,255,.12)}
.badge--accent{color:#FFD3B8;border-color:rgba(255,138,76,.35);background:rgba(255,138,76,.12)}
.card-tags{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.tick-list{display:flex;flex-direction:column;gap:10px;margin-top:18px}
.tick-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-2)}
.tick-list svg{flex:0 0 auto;margin-top:6px;color:var(--brand-2)}

/* 场景卡 */
.case-card{padding:0;overflow:hidden}
.case-body{padding:22px 24px 26px}
.case-meta{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3);margin-bottom:12px}
.case-quote{
  margin-top:18px;padding:14px 16px;border-left:3px solid var(--brand);
  background:rgba(31,200,212,.06);border-radius:0 var(--r-sm) var(--r-sm) 0;
  font-size:14px;color:var(--text-2);
}

/* 权益对照表 */
.table-wrap{
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  background:var(--surface-2);backdrop-filter:blur(16px) saturate(140%);
  -webkit-backdrop-filter:blur(16px) saturate(140%);
}
table{width:100%;border-collapse:collapse;min-width:640px}
thead th{
  position:sticky;top:72px;z-index:5;
  background:rgba(16,28,41,.96);backdrop-filter:blur(10px);
  text-align:left;font-size:14px;font-weight:700;color:var(--text-1);
  padding:16px 18px;border-bottom:1px solid var(--line-strong);white-space:nowrap;
}
tbody td{
  padding:16px 18px;border-bottom:1px solid var(--line);font-size:15px;color:var(--text-2);
  min-height:52px;
}
tbody tr:last-child td{border-bottom:0}
tbody tr:hover td{background:rgba(31,200,212,.045)}
td:first-child,th:first-child{color:var(--text-1);font-weight:600}
.cell-brand{color:var(--brand-soft)!important}
.cell-violet{color:#C6C0FF!important}
.cell-accent{color:var(--accent-soft)!important}
.swatch{display:inline-block;width:8px;height:8px;border-radius:2px;margin-right:8px;vertical-align:middle}
.swatch--brand{background:var(--brand)}
.swatch--violet{background:var(--violet)}
.swatch--accent{background:var(--accent)}
.table-note{margin-top:16px;font-size:13px;color:var(--text-3)}

/* FAQ */
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq-item{
  border:1px solid var(--line);border-radius:var(--r-md);
  background:var(--surface);overflow:hidden;transition:border-color .2s var(--ease),background .2s var(--ease);
}
.faq-item.open{border-color:rgba(31,200,212,.4);background:rgba(31,200,212,.05)}
.faq-q{
  position:relative;width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 22px;background:none;border:0;text-align:left;
  font-size:16px;font-weight:600;color:var(--text-1);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:12px;bottom:12px;width:3px;border-radius:0 3px 3px 0;
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  opacity:0;transition:opacity .2s var(--ease);
}
.faq-item.open .faq-q::before{opacity:1}
.faq-icon{
  flex:0 0 auto;width:26px;height:26px;border-radius:50%;
  border:1px solid var(--line-strong);color:var(--brand);
  display:flex;align-items:center;justify-content:center;
  transition:transform .25s var(--ease),background .2s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(180deg);background:rgba(31,200,212,.14)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 22px 20px;margin:0;font-size:15px;color:var(--text-2)}

/* CTA band */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--r-lg);
  border:1px solid var(--line-strong);
  background:
    linear-gradient(120deg,rgba(8,13,20,.9),rgba(8,13,20,.72)),
    url('/assets/images/backpic/back-3.png') center/cover no-repeat;
  padding:56px 48px;
  display:grid;grid-template-columns:1.4fr auto;gap:32px;align-items:center;
}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:var(--text-2);margin-bottom:0;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px}

/* footer */
.site-footer{
  border-top:1px solid var(--line);background:var(--bg-1);
  padding:64px 0 28px;margin-top:0;
}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-col h4{font-size:15px;margin-bottom:18px;color:var(--text-1)}
.footer-col p{font-size:14px;color:var(--text-3);max-width:34ch}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:var(--text-2)}
.footer-col a:hover{color:var(--brand)}
.copyright{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  margin-top:48px;padding-top:22px;border-top:1px solid var(--line);
  font-size:13px;color:var(--text-3);
}

/* 响应式 */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:44px 32px}
  .nav{
    position:absolute;left:16px;right:16px;top:76px;
    flex-direction:column;align-items:stretch;gap:6px;
    padding:14px;border-radius:var(--r-lg);
    background:rgba(13,22,34,.97);border:1px solid var(--line-strong);
    backdrop-filter:blur(18px) saturate(140%);
    -webkit-backdrop-filter:blur(18px) saturate(140%);
    box-shadow:0 30px 60px -24px rgba(0,0,0,.8);
    display:none;
  }
  .nav.open{display:flex}
  .nav-link{height:46px;border-radius:var(--r-md);padding:0 14px}
  .nav-link.active::after{display:none}
  .nav-toggle{display:flex}
  .header-cta{display:none}
  thead th{top:64px}
}
@media (max-width:768px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .hero{padding:64px 0 56px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .stats{gap:24px}
  .stat-num{font-size:26px}
  .hero-actions .btn{width:100%}
  .cta-actions .btn{width:100%}
  .table-wrap{border:0;background:transparent;backdrop-filter:none;-webkit-backdrop-filter:none}
  table{min-width:0;display:block}
  thead{display:none}
  tbody,tbody tr,tbody td{display:block;width:100%}
  tbody tr{
    margin-bottom:16px;border:1px solid var(--line);border-radius:var(--r-md);
    background:var(--surface);overflow:hidden;
  }
  tbody td{border-bottom:1px solid var(--line);padding:12px 16px}
  tbody tr td:last-child{border-bottom:0}
  tbody td::before{
    content:attr(data-label);display:block;
    font-size:12px;letter-spacing:.08em;color:var(--text-3);margin-bottom:4px;
  }
  tbody tr:hover td{background:transparent}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .copyright{flex-direction:column;gap:8px}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a p{padding:0 18px 18px}
  .cta-band{padding:32px 22px}
}
@media (max-width:520px){
  h1{font-size:28px}
  .brand{font-size:16px}
  .btn{font-size:14px;padding:0 18px}
}