/* roulang page: index */
:root{
  --ink:#0a1c2b;
  --ink-2:#0f3346;
  --ink-3:#10485a;
  --teal:#12a3b4;
  --teal-600:#0c8593;
  --teal-100:#e6f6f8;
  --teal-line:#cdeef2;
  --sand:#f4f8fa;
  --line:#e2eaee;
  --text:#17272f;
  --muted:#5c7482;
  --white:#ffffff;
  --radius:14px;
  --radius-lg:18px;
  --radius-sm:10px;
  --shadow-sm:0 1px 2px rgba(12,40,58,.05),0 6px 18px rgba(12,40,58,.06);
  --shadow-md:0 12px 30px rgba(12,40,58,.12);
  --shadow-lg:0 20px 48px rgba(8,28,42,.22);
  --max:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0}
.site-body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.78;color:var(--text);background:#fff;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
:focus-visible{outline:2px solid var(--teal);outline-offset:3px;border-radius:8px}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(10,28,43,.94);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.08);
  transition:box-shadow .25s ease,background .25s ease;
}
.site-header.scrolled{box-shadow:0 10px 28px rgba(6,20,32,.34);background:rgba(8,24,37,.97)}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:#fff;flex:0 0 auto}
.brand-mark{
  width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:linear-gradient(140deg,#19b6c8,#0c8593);
  box-shadow:0 6px 16px rgba(18,163,180,.38);color:#fff;
}
.brand-text{font-size:16.5px;font-weight:800;letter-spacing:.4px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:6px}
.nav-link{position:relative;font-size:14.5px;font-weight:500;color:rgba(255,255,255,.72);padding:20px 2px;transition:color .2s ease;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:12px;height:2px;border-radius:2px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav-link:hover{color:#fff}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:700}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
  display:flex;align-items:center;gap:8px;height:38px;padding:0 12px;
  border-radius:10px;background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.6);
  transition:border-color .2s ease,background .2s ease;
}
.search:focus-within{border-color:rgba(18,163,180,.8);background:rgba(255,255,255,.12)}
.search input{width:132px;border:0;background:transparent;color:#fff;font-size:13px;outline:none}
.search input::placeholder{color:rgba(255,255,255,.45)}
.version-chip{
  font-size:12px;font-weight:600;color:#9fe6ef;padding:5px 10px;border-radius:999px;
  background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.35);white-space:nowrap;
}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:0 22px;border-radius:10px;
  font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
  white-space:nowrap;
}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 18px rgba(18,163,180,.28)}
.btn-primary:hover{background:var(--teal-600);transform:translateY(-2px);box-shadow:0 14px 26px rgba(18,163,180,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(18,163,180,.3)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--teal-600);border-color:#bfe3e9}
.btn-outline:hover{background:var(--teal-100);transform:translateY(-2px);border-color:var(--teal)}
.menu-btn{display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.2);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .22s ease,opacity .22s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{max-height:0;overflow:hidden;transition:max-height .3s ease;background:rgba(8,24,37,.99);border-top:1px solid rgba(255,255,255,.08)}
.mobile-panel.open{max-height:340px}
.mobile-panel .inner{padding:10px 24px 20px;display:flex;flex-direction:column;gap:4px}
.mobile-panel a{color:rgba(255,255,255,.82);font-size:15px;padding:12px 4px;border-bottom:1px solid rgba(255,255,255,.07);border-radius:6px}
.mobile-panel a:hover{color:#fff;background:rgba(255,255,255,.05)}
.mobile-panel a.is-active{color:#5fd7e6;font-weight:700}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:#0a1c2b url('/assets/images/backpic/back-1.gif') center/cover no-repeat}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(112deg,rgba(8,24,37,.96) 0%,rgba(8,26,40,.9) 44%,rgba(11,62,76,.74) 100%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.18fr .82fr;gap:48px;align-items:center;padding:74px 0 82px}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
  color:#8fe3ee;background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.4);
  padding:7px 14px;border-radius:999px;letter-spacing:.4px;
}
.hero h1{
  font-size:40px;line-height:1.28;font-weight:800;color:#fff;margin:20px 0 18px;
  letter-spacing:.4px;max-width:640px;
}
.hero-lead{font-size:15.5px;line-height:1.9;color:rgba(231,242,246,.8);max-width:600px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 26px}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;
  font-size:13px;font-weight:500;background:var(--teal-100);color:var(--teal-600);border:1px solid var(--teal-line);
}
.hero-tags .tag{background:rgba(255,255,255,.1);color:#c8f0f6;border-color:rgba(255,255,255,.22)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.commit-card{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius-lg);padding:28px 24px;backdrop-filter:blur(8px);
  box-shadow:var(--shadow-lg);
}
.ring{
  --p:86;
  width:168px;height:168px;border-radius:50%;margin:0 auto;position:relative;
  background:conic-gradient(#2ad0e0 calc(var(--p) * 1%),rgba(255,255,255,.14) 0);
  display:grid;place-items:center;
}
.ring::before{content:"";position:absolute;inset:13px;border-radius:50%;background:#0b2434;box-shadow:inset 0 0 0 1px rgba(255,255,255,.06)}
.ring-inner{position:relative;text-align:center;color:#fff;line-height:1.3}
.ring-inner strong{display:block;font-size:34px;font-weight:800;letter-spacing:.5px}
.ring-inner span{font-size:12.5px;color:rgba(200,240,246,.72)}
.commit-note{margin:16px 0 20px;text-align:center;font-size:13px;color:rgba(200,240,246,.68)}
.tiers{display:flex;flex-direction:column;gap:10px}
.tier{
  display:flex;align-items:center;justify-content:space-between;
  padding:11px 14px;border-radius:10px;background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.12);color:#e6f3f7;font-size:13.5px;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.tier:hover{background:rgba(255,255,255,.12);border-color:rgba(42,208,224,.5);transform:translateX(3px)}
.tier strong{font-size:14.5px;color:#5fd7e6;font-weight:700}

/* ---------- stats ---------- */
.stats-wrap{position:relative;z-index:3;margin-top:-34px}
.stats{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);
}
.stat{background:#fff;padding:24px 22px}
.stat strong{display:block;font-size:27px;font-weight:800;color:var(--ink);letter-spacing:.4px}
.stat span{display:block;font-size:13.5px;color:var(--muted);margin-top:4px}

/* ---------- sections ---------- */
.section{padding:76px 0;position:relative}
.section--sand{background:var(--sand)}
.section--white{background:#fff}
.section--dark{background:linear-gradient(158deg,#0a1c2b 0%,#0f3346 58%,#0f4457 100%);color:#e8f2f6}
.sec-head{max-width:740px;margin-bottom:38px}
.sec-kicker{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--teal-600)}
.sec-kicker::before{content:"";width:20px;height:2px;border-radius:2px;background:var(--teal)}
.sec-title{font-size:29px;line-height:1.38;font-weight:800;color:var(--ink);margin:12px 0 12px;letter-spacing:.2px}
.sec-desc{font-size:15px;line-height:1.85;color:var(--muted);max-width:700px}
.section--dark .sec-title{color:#fff}
.section--dark .sec-desc{color:rgba(226,240,246,.72)}
.section--dark .sec-kicker{color:#7fdfec}
.section--dark .sec-kicker::before{background:#2ad0e0}

.grid{display:grid;gap:22px}
.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{
  display:flex;flex-direction:column;gap:12px;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.card-icon{
  width:44px;height:44px;border-radius:12px;display:grid;place-items:center;
  background:var(--teal-100);color:var(--teal-600);border:1px solid var(--teal-line);
}
.card h3{font-size:17px;font-weight:700;color:var(--ink);line-height:1.5}
.card p{font-size:14.5px;line-height:1.78;color:var(--muted)}
.card-meta{margin-top:auto;display:flex;flex-wrap:wrap;gap:8px;padding-top:6px}
.chip{font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;background:#f1f6f8;color:#4d6a78;border:1px solid var(--line)}
.chip-teal{background:var(--teal-100);color:var(--teal-600);border-color:var(--teal-line)}
.section--dark .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.13);box-shadow:none}
.section--dark .card:hover{background:rgba(255,255,255,.1);border-color:rgba(42,208,224,.45)}
.section--dark .card h3{color:#fff}
.section--dark .card p{color:rgba(226,240,246,.72)}
.section--dark .card-icon{background:rgba(42,208,224,.14);border-color:rgba(42,208,224,.3);color:#6fdcea}
.section--dark .chip{background:rgba(255,255,255,.08);color:rgba(226,240,246,.8);border-color:rgba(255,255,255,.14)}
.section--dark .chip-teal{background:rgba(42,208,224,.16);color:#8ee9f4;border-color:rgba(42,208,224,.32)}

/* ---------- summary list ---------- */
.summary-list{display:grid;gap:14px}
.summary-item{
  display:flex;gap:16px;align-items:flex-start;padding:18px 20px;background:#fff;
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.summary-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.num{
  flex:0 0 auto;width:30px;height:30px;border-radius:9px;display:grid;place-items:center;
  background:var(--teal-100);color:var(--teal-600);font-size:13px;font-weight:800;border:1px solid var(--teal-line);
}
.summary-item h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:4px}
.summary-item p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- version tiers ---------- */
.tier-card{
  position:relative;display:flex;flex-direction:column;gap:14px;height:100%;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tier-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.tier-card.is-featured{border-color:var(--teal);box-shadow:0 16px 36px rgba(18,163,180,.18)}
.tier-badge{
  position:absolute;top:-13px;left:24px;font-size:12px;font-weight:700;color:#fff;
  background:var(--teal);padding:4px 12px;border-radius:999px;letter-spacing:.4px;
  box-shadow:0 6px 14px rgba(18,163,180,.32);
}
.tier-card h3{font-size:18px;font-weight:800;color:var(--ink)}
.tier-size{font-size:28px;font-weight:800;color:var(--teal-600);letter-spacing:.5px}
.tier-size small{font-size:13px;font-weight:600;color:var(--muted);margin-left:4px}
.tier-spec{display:grid;gap:9px;font-size:14px;color:var(--muted)}
.tier-spec li{display:flex;gap:9px;align-items:flex-start;line-height:1.7}
.tick{flex:0 0 auto;width:17px;height:17px;margin-top:4px;color:var(--teal)}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;counter-reset:step}
.step{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px 22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.step::before{
  counter-increment:step;content:"0" counter(step);
  position:absolute;top:-14px;left:22px;font-size:13px;font-weight:800;color:var(--teal-600);
  background:var(--teal-100);border:1px solid var(--teal-line);border-radius:8px;padding:2px 10px;
}
.step h3{font-size:16px;font-weight:700;color:var(--ink);margin:6px 0 8px}
.step p{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- community ---------- */
.moment-layout{display:grid;grid-template-columns:1.05fr .95fr;gap:34px;align-items:center}
.moment-shot{
  border-radius:var(--radius-lg);overflow:hidden;border:1px solid rgba(255,255,255,.14);
  box-shadow:var(--shadow-lg);position:relative;
}
.moment-shot img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;transition:transform .4s ease}
.moment-shot:hover img{transform:scale(1.04)}
.moment-shot figcaption{
  position:absolute;left:0;right:0;bottom:0;padding:16px 18px;font-size:13px;
  color:#e6f3f7;background:linear-gradient(to top,rgba(6,20,32,.86),rgba(6,20,32,0));
}
.moment-list{display:grid;gap:12px;margin-top:22px}
.moment-item{
  display:flex;gap:14px;align-items:flex-start;padding:16px 18px;border-radius:12px;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.moment-item:hover{background:rgba(255,255,255,.11);border-color:rgba(42,208,224,.42);transform:translateX(3px)}
.moment-item h3{font-size:15px;font-weight:700;color:#fff;margin-bottom:3px}
.moment-item p{font-size:13.5px;color:rgba(226,240,246,.7);line-height:1.7}

/* ---------- channel wall ---------- */
.channel{
  display:flex;flex-direction:column;gap:12px;height:100%;padding:26px 24px;
  border-radius:var(--radius);background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.channel h3{font-size:18px;font-weight:800;color:var(--ink)}
.channel p{font-size:14.5px;color:var(--muted);line-height:1.75}
.channel .more{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--teal-600);margin-top:auto}
.channel:hover .more{color:var(--teal)}

/* ---------- news ---------- */
.news-layout{display:grid;grid-template-columns:1.62fr .88fr;gap:30px;align-items:start}
.news-list{display:grid;gap:12px}
.news-item{
  display:block;padding:20px 22px;border-radius:var(--radius);background:#fff;
  border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.news-item h3{font-size:16.5px;font-weight:700;color:var(--ink);line-height:1.55;margin-bottom:6px}
.news-item p{font-size:14px;color:var(--muted);line-height:1.75;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:10px;font-size:12.5px;color:#8199a6}
.news-side{
  border-radius:var(--radius);border:1px solid var(--line);background:#fff;
  box-shadow:var(--shadow-sm);padding:22px;position:sticky;top:88px;
}
.news-side h3{font-size:15.5px;font-weight:800;color:var(--ink);margin-bottom:14px;padding-bottom:12px;border-bottom:1px solid var(--line)}
.side-item{display:block;padding:12px 0;border-bottom:1px dashed var(--line);transition:color .2s ease}
.side-item:last-child{border-bottom:0;padding-bottom:0}
.side-item span{display:block;font-size:14px;font-weight:600;color:var(--ink);line-height:1.6}
.side-item small{display:block;font-size:12px;color:#8ba2ae;margin-top:4px}
.side-item:hover span{color:var(--teal-600)}
.empty-note{padding:26px;border-radius:var(--radius);background:#fff;border:1px dashed #cbdde4;color:var(--muted);font-size:14.5px;text-align:center}

/* ---------- matrix ---------- */
.matrix{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow-sm)}
.matrix-head,.matrix-row{display:grid;grid-template-columns:1.1fr 1fr 1.3fr;gap:16px;padding:16px 22px;align-items:center}
.matrix-head{background:#eef5f7;font-size:13px;font-weight:700;color:#4d6a78;letter-spacing:.05em;border-bottom:1px solid var(--line)}
.matrix-row{border-bottom:1px solid var(--line);transition:background .2s ease}
.matrix-row:last-child{border-bottom:0}
.matrix-row:hover{background:#f8fcfd}
.matrix-row strong{font-size:14.5px;color:var(--ink);font-weight:700}
.matrix-row span{font-size:14px;color:var(--muted)}

/* ---------- safety / voices ---------- */
.safe-item{
  display:flex;gap:14px;align-items:flex-start;padding:20px 22px;border-radius:var(--radius);
  background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.safe-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.safe-item h3{font-size:15.5px;font-weight:700;color:var(--ink);margin-bottom:4px}
.safe-item p{font-size:14px;color:var(--muted);line-height:1.72}
.voice{
  display:flex;flex-direction:column;gap:14px;height:100%;padding:24px;
  border-radius:var(--radius);background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.voice:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:#bedbe4}
.voice p{font-size:14.5px;line-height:1.8;color:#334852}
.voice-user{display:flex;align-items:center;gap:11px;margin-top:auto;padding-top:6px}
.avatar{
  width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
  background:var(--teal-100);color:var(--teal-600);font-weight:800;font-size:14px;border:1px solid var(--teal-line);
}
.voice-user strong{display:block;font-size:14px;color:var(--ink);line-height:1.4}
.voice-user small{display:block;font-size:12px;color:#8ba2ae}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:12px;max-width:900px}
.faq-item{border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item[open]{border-color:#bedbe4;box-shadow:var(--shadow-md)}
.faq-item summary{
  cursor:pointer;list-style:none;padding:19px 54px 19px 22px;position:relative;
  font-size:15.5px;font-weight:700;color:var(--ink);transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";position:absolute;right:22px;top:50%;width:9px;height:9px;
  border-right:2px solid var(--teal-600);border-bottom:2px solid var(--teal-600);
  transform:translateY(-70%) rotate(45deg);transition:transform .22s ease;
}
.faq-item[open] summary::after{transform:translateY(-30%) rotate(-135deg)}
.faq-item summary:hover{color:var(--teal-600)}
.faq-item .answer{padding:0 22px 20px;font-size:14.5px;line-height:1.85;color:var(--muted)}

/* ---------- join form ---------- */
.join-layout{display:grid;grid-template-columns:1fr 1.05fr;gap:36px;align-items:start}
.form-card{
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  border-radius:var(--radius-lg);padding:28px;backdrop-filter:blur(8px);box-shadow:var(--shadow-lg);
}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:16px}
.field label{font-size:13.5px;font-weight:600;color:rgba(226,240,246,.85)}
.field input,.field select,.field textarea{
  width:100%;padding:11px 14px;border-radius:10px;font-size:14.5px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#fff;
  transition:border-color .2s ease,background .2s ease;
}
.field textarea{resize:vertical;min-height:96px;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.4)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:#2ad0e0;background:rgba(255,255,255,.16)}
.field select option{color:#17272f}
.form-note{margin-top:14px;font-size:13px;color:#8ee9f4;min-height:20px}
.join-points{display:grid;gap:14px}
.join-point{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border-radius:12px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
}
.join-point h3{font-size:15.5px;font-weight:700;color:#fff;margin-bottom:4px}
.join-point p{font-size:14px;color:rgba(226,240,246,.7);line-height:1.72}

/* ---------- footer ---------- */
.site-footer{background:#081825;color:#b9cdd7;border-top:1px solid rgba(255,255,255,.08)}
.footer-top{display:grid;grid-template-columns:1.3fr .8fr .8fr 1fr;gap:32px;padding:56px 0 40px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:16.5px;margin-bottom:14px}
.footer-about{font-size:14px;line-height:1.8;color:rgba(185,205,215,.78);max-width:320px}
.footer-col h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.5px}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:14px;color:rgba(185,205,215,.8);transition:color .2s ease,padding-left .2s ease}
.footer-col a:hover{color:#5fd7e6;padding-left:4px}
.footer-contact{font-size:14px;line-height:1.8;color:rgba(185,205,215,.8)}
.footer-contact strong{display:block;color:#fff;font-size:15px;margin-bottom:8px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding:20px 0 26px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
  font-size:13px;color:rgba(185,205,215,.62);
}
.footer-bottom a{color:rgba(185,205,215,.75)}
.footer-bottom a:hover{color:#5fd7e6}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .hero h1{font-size:34px}
  .hero-grid{gap:34px;padding:60px 0 70px}
  .cols-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .news-layout{grid-template-columns:1fr}
  .news-side{position:static}
  .footer-top{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
  .footer-contact{grid-column:1 / -1}
}
@media (max-width:960px){
  .main-nav{display:none}
  .search{display:none}
  .menu-btn{display:flex}
  .hero-grid{grid-template-columns:1fr}
  .commit-card{max-width:460px}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .moment-layout{grid-template-columns:1fr}
  .join-layout{grid-template-columns:1fr}
}
@media (max-width:820px){
  .cols-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .section{padding:60px 0}
  .sec-title{font-size:25px}
  .hero h1{font-size:30px}
}
@media (max-width:640px){
  .container{padding:0 18px}
  .version-chip{display:none}
  .hero h1{font-size:26px;line-height:1.35}
  .hero-lead{font-size:14.5px}
  .hero-grid{padding:44px 0 56px}
  .ring{width:148px;height:148px}
  .ring-inner strong{font-size:29px}
  .cols-2,.cols-3,.cols-4{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr}
  .stat{padding:20px}
  .matrix-head{display:none}
  .matrix-row{grid-template-columns:1fr;gap:6px;padding:16px 18px}
  .matrix-row strong{font-size:15px}
  .footer-top{grid-template-columns:1fr;padding:44px 0 30px}
  .sec-title{font-size:23px}
  .btn{min-height:46px}
  .form-card{padding:22px}
}

/* roulang page: article */
:root{
 --ink:#0a1c2b;
 --ink-2:#0f3346;
 --ink-3:#10485a;
 --teal:#12a3b4;
 --teal-600:#0c8593;
 --teal-100:#e6f6f8;
 --teal-line:#cdeef2;
 --sand:#f4f8fa;
 --line:#e2eaee;
 --text:#17272f;
 --muted:#5c7482;
 --white:#ffffff;
 --radius:14px;
 --radius-lg:18px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(12,40,58,.05),0 6px 18px rgba(12,40,58,.06);
 --shadow-md:0 12px 30px rgba(12,40,58,.12);
 --shadow-lg:0 20px 48px rgba(8,28,42,.22);
 --max:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0}
.site-body{
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.78;color:var(--text);background:#fff;
 -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(10,28,43,.94);
 backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
 border-bottom:1px solid rgba(255,255,255,.08);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.scrolled{box-shadow:0 10px 28px rgba(6,20,32,.34);background:rgba(8,24,37,.97)}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:#fff;flex:0 0 auto}
.brand-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(140deg,#19b6c8,#0c8593);
 box-shadow:0 6px 16px rgba(18,163,180,.38);color:#fff;
}
.brand-text{font-size:16.5px;font-weight:800;letter-spacing:.4px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:6px}
.nav-link{position:relative;font-size:14.5px;font-weight:500;color:rgba(255,255,255,.72);padding:20px 2px;transition:color .2s ease;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:12px;height:2px;border-radius:2px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav-link:hover{color:#fff}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:700}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
 display:flex;align-items:center;gap:8px;height:38px;padding:0 12px;
 border-radius:10px;background:rgba(255,255,255,.08);
 border:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.6);
 transition:border-color .2s ease,background .2s ease;
}
.search:focus-within{border-color:rgba(18,163,180,.8);background:rgba(255,255,255,.12)}
.search input{width:132px;border:0;background:transparent;color:#fff;font-size:13px;outline:none}
.search input::placeholder{color:rgba(255,255,255,.45)}
.version-chip{
 font-size:12px;font-weight:600;color:#9fe6ef;padding:5px 10px;border-radius:999px;
 background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.35);white-space:nowrap;
}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:44px;padding:0 22px;border-radius:10px;
 font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
 white-space:nowrap;
}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 18px rgba(18,163,180,.28)}
.btn-primary:hover{background:var(--teal-600);transform:translateY(-2px);box-shadow:0 14px 26px rgba(18,163,180,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(18,163,180,.3)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--teal-600);border-color:#bfe3e9}
.btn-outline:hover{background:var(--teal-100);transform:translateY(-2px);border-color:var(--teal)}
.btn:focus-visible,.nav-link:focus-visible,.toc-list a:focus-visible{outline:3px solid rgba(18,163,180,.55);outline-offset:3px}
.menu-btn{display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.2);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .22s ease,opacity .22s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{max-height:0;overflow:hidden;transition:max-height .3s ease;background:rgba(8,24,37,.99);border-top:1px solid rgba(255,255,255,.08)}
.mobile-panel.open{max-height:420px}
.mobile-panel .inner{padding:10px 24px 20px;display:flex;flex-direction:column;gap:4px}
.mobile-panel a{color:rgba(255,255,255,.82);font-size:15px;padding:12px 4px;border-bottom:1px solid rgba(255,255,255,.07);border-radius:6px}
.mobile-panel a:hover{color:#fff;background:rgba(255,255,255,.05)}
.mobile-panel a.is-active{color:#5fd7e6;font-weight:700}

/* ---------- article hero ---------- */
.article-hero{position:relative;overflow:hidden;background:#0a1c2b url('/assets/images/backpic/back-3.webp') center/cover no-repeat}
.article-hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(112deg,rgba(8,24,37,.97) 0%,rgba(8,26,40,.92) 46%,rgba(11,62,76,.76) 100%);
}
.article-hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.16fr .84fr;gap:48px;align-items:center;padding:56px 0 64px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(214,232,238,.62);margin-bottom:18px}
.crumbs a{color:rgba(214,232,238,.82)}
.crumbs a:hover{color:#8fe3ee}
.crumbs span.sep{color:rgba(214,232,238,.35)}
.hero-eyebrow{
 display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
 color:#8fe3ee;background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.4);
 padding:7px 14px;border-radius:999px;letter-spacing:.4px;
}
.article-hero h1{
 font-size:clamp(26px,3.2vw,40px);line-height:1.32;font-weight:800;color:#fff;
 margin:20px 0 16px;letter-spacing:.3px;max-width:680px;
}
.hero-lead{font-size:15px;line-height:1.9;color:rgba(231,242,246,.8);max-width:640px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 20px}
.tag{
 display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;
 font-size:12.5px;font-weight:600;color:#a8e7ef;
 background:rgba(18,163,180,.13);border:1px solid rgba(18,163,180,.34);
 transition:background .2s ease,border-color .2s ease;
}
.tag:hover{background:rgba(18,163,180,.24);border-color:rgba(18,163,180,.6)}
.hero-meta{display:flex;flex-wrap:wrap;gap:18px;font-size:13px;color:rgba(214,232,238,.6)}
.hero-meta strong{color:#cfeef3;font-weight:600}
.hero-panel{
 background:rgba(255,255,255,.07);
 border:1px solid rgba(255,255,255,.16);
 border-radius:var(--radius-lg);
 padding:26px 24px;
 box-shadow:var(--shadow-lg);
 backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.hero-panel h2{font-size:16px;font-weight:700;color:#fff;margin:0 0 8px}
.hero-panel .panel-desc{font-size:13.5px;line-height:1.8;color:rgba(224,240,245,.72);margin:0 0 18px}
.progress-label{display:flex;justify-content:space-between;font-size:12.5px;color:rgba(224,240,245,.72);margin-bottom:8px}
.progress-label b{color:#8fe3ee;font-size:14px}
.progress{height:9px;border-radius:999px;background:rgba(255,255,255,.16);overflow:hidden}
.progress i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#19b6c8,#7fe3ee);box-shadow:0 0 14px rgba(127,227,238,.5)}
.check-list{list-style:none;margin:18px 0 22px;padding:0;display:grid;gap:10px}
.check-list li{display:flex;gap:9px;font-size:13.5px;color:rgba(228,242,246,.82);line-height:1.6}
.check-list svg{flex:0 0 auto;margin-top:3px;color:#5fd7e6}
.hero-panel .btn{width:100%}

/* ---------- sections ---------- */
.section{padding:70px 0}
.section-sand{background:var(--sand)}
.section-ink{background:var(--ink);color:#fff}
.section-head{max-width:760px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-tag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:1.2px;color:var(--teal-600);text-transform:uppercase}
.section-tag::before{content:"";width:22px;height:3px;border-radius:2px;background:var(--teal)}
.section-ink .section-tag{color:#7fe3ee}
.section-head h2{font-size:clamp(22px,2.4vw,30px);line-height:1.4;font-weight:800;color:var(--ink);margin:14px 0 10px}
.section-ink .section-head h2{color:#fff}
.section-head p{font-size:15px;line-height:1.85;color:var(--muted);margin:0}
.section-ink .section-head p{color:rgba(224,240,245,.72)}

/* ---------- doc layout ---------- */
.doc-layout{display:grid;grid-template-columns:262px minmax(0,1fr);gap:44px;align-items:start}
.doc-side-inner{position:sticky;top:88px;display:grid;gap:18px}
.doc-side-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:20px 18px;
}
.doc-side-title{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--ink-3);margin:0 0 12px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.toc-list{list-style:none;margin:0;padding:0;display:grid;gap:2px;max-height:46vh;overflow:auto}
.toc-list li a{display:block;font-size:13.5px;line-height:1.6;color:var(--muted);padding:7px 10px;border-radius:8px;border-left:2px solid transparent;transition:all .18s ease}
.toc-list li a:hover{color:var(--teal-600);background:var(--teal-100);border-left-color:var(--teal)}
.toc-list li.is-sub a{padding-left:22px;font-size:13px;color:#7b93a0}
.toc-empty{font-size:13px;color:#8ba3af;padding:6px 4px}
.doc-side-cta{background:linear-gradient(160deg,#0f3346,#10485a);border-radius:var(--radius);padding:20px 18px;color:#fff;box-shadow:var(--shadow-md)}
.doc-side-cta strong{display:block;font-size:14.5px;margin-bottom:8px}
.doc-side-cta p{font-size:13px;line-height:1.7;color:rgba(224,240,245,.74);margin:0 0 14px}
.doc-side-cta .btn{width:100%;background:transparent;color:#a8e7ef;border-color:rgba(127,227,238,.5)}
.doc-side-cta .btn:hover{background:rgba(127,227,238,.14);border-color:#7fe3ee}

/* ---------- cms content ---------- */
.doc-main{min-width:0}
.cms-content{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
 box-shadow:var(--shadow-sm);padding:40px 42px;
}
.cms-content h2{
 font-size:23px;line-height:1.45;font-weight:800;color:var(--ink);
 margin:38px 0 14px;padding-left:14px;border-left:4px solid var(--teal);scroll-margin-top:92px;
}
.cms-content h3{font-size:18px;line-height:1.5;font-weight:700;color:var(--ink-2);margin:28px 0 10px;scroll-margin-top:92px}
.cms-content h2:first-child,.cms-content h3:first-child{margin-top:0}
.cms-content p{font-size:15.5px;line-height:1.92;color:#2b3d47;margin:0 0 18px}
.cms-content a{color:var(--teal-600);font-weight:600;border-bottom:1px solid var(--teal-line)}
.cms-content a:hover{color:var(--teal);border-bottom-color:var(--teal)}
.cms-content strong{color:var(--ink);font-weight:700}
.cms-content ul,.cms-content ol{margin:0 0 20px;padding-left:22px}
.cms-content li{font-size:15.5px;line-height:1.9;color:#2b3d47;margin-bottom:8px}
.cms-content ul li::marker{color:var(--teal)}
.cms-content blockquote{
 margin:24px 0;padding:16px 20px;border-left:4px solid #7fe3ee;background:var(--teal-100);
 border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:#154c57;font-size:15px;line-height:1.85;
}
.cms-content blockquote p:last-child{margin-bottom:0}
.cms-content img{border-radius:var(--radius);margin:22px auto;box-shadow:var(--shadow-sm)}
.cms-content table{width:100%;border-collapse:collapse;margin:22px 0;font-size:14.5px}
.cms-content th,.cms-content td{border:1px solid var(--line);padding:11px 14px;text-align:left;line-height:1.7}
.cms-content th{background:var(--sand);color:var(--ink-2);font-weight:700}
.cms-content code{background:var(--sand);border-radius:6px;padding:2px 6px;font-size:14px;color:#0c6d78}
.cms-content hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.empty-state{text-align:center;padding:36px 10px}
.empty-state h2{font-size:22px;border:0;padding:0;margin:0 0 12px;justify-self:center}
.empty-state p{font-size:15px;color:var(--muted);max-width:460px;margin:0 auto 22px}

/* ---------- cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:24px 22px;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.card-icon{
 width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
 background:var(--teal-100);color:var(--teal-600);margin-bottom:16px;border:1px solid var(--teal-line);
}
.card h3{font-size:17px;font-weight:700;color:var(--ink);margin:0 0 10px}
.card p{font-size:14.5px;line-height:1.85;color:var(--muted);margin:0 0 14px}
.card .tag{color:var(--teal-600);background:var(--teal-100);border-color:var(--teal-line)}
.card .tag:hover{background:#d5f0f4;border-color:#a9e0e8}

/* ---------- stats ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{
 background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);
 border-radius:var(--radius);padding:24px 20px;
 transition:transform .2s ease,border-color .2s ease,background .2s ease;
}
.stat:hover{transform:translateY(-4px);border-color:rgba(127,227,238,.45);background:rgba(255,255,255,.1)}
.stat-num{font-size:30px;font-weight:800;color:#7fe3ee;line-height:1.2;letter-spacing:.5px}
.stat-num small{font-size:14px;font-weight:700;margin-left:3px;color:#a8e7ef}
.stat-label{font-size:14px;font-weight:600;color:#fff;margin:8px 0 6px}
.stat-desc{font-size:13px;line-height:1.7;color:rgba(224,240,245,.66);margin:0}

/* ---------- spec table ---------- */
.spec-list{display:grid;gap:14px}
.spec-row{
 display:grid;grid-template-columns:132px 1fr 110px;gap:20px;align-items:center;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:18px 22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.spec-row:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.spec-row .spec-key{font-size:15px;font-weight:800;color:var(--ink)}
.spec-row .spec-key em{display:block;font-style:normal;font-size:12.5px;font-weight:600;color:var(--teal-600);margin-top:2px}
.spec-row .spec-desc{font-size:14px;line-height:1.75;color:var(--muted);margin:0}
.spec-row .spec-fps{
 justify-self:end;font-size:13px;font-weight:700;color:var(--teal-600);
 background:var(--teal-100);border:1px solid var(--teal-line);border-radius:999px;padding:6px 14px;white-space:nowrap;
}

/* ---------- channel matrix ---------- */
.matrix-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.matrix-card{
 display:block;position:relative;overflow:hidden;
 background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);
 box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.matrix-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.matrix-card .thumb{aspect-ratio:16/9;overflow:hidden;background:var(--sand)}
.matrix-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.matrix-card:hover .thumb img{transform:scale(1.04)}
.matrix-body{padding:20px 22px 22px}
.matrix-body h3{font-size:17px;font-weight:700;color:var(--ink);margin:0 0 8px}
.matrix-body p{font-size:14px;line-height:1.8;color:var(--muted);margin:0 0 14px}
.matrix-more{font-size:13.5px;font-weight:700;color:var(--teal-600);display:inline-flex;align-items:center;gap:6px}
.matrix-card:hover .matrix-more{color:var(--teal)}

/* ---------- join ---------- */
.join-wrap{display:grid;grid-template-columns:1fr 1.05fr;gap:44px;align-items:start}
.join-copy h2{font-size:clamp(22px,2.4vw,30px);font-weight:800;color:#fff;margin:14px 0 12px;line-height:1.42}
.join-copy p{font-size:15px;line-height:1.9;color:rgba(224,240,245,.75);margin:0 0 20px}
.join-points{list-style:none;margin:0;padding:0;display:grid;gap:12px}
.join-points li{display:flex;gap:10px;font-size:14px;color:rgba(228,242,246,.85);line-height:1.7}
.join-points svg{flex:0 0 auto;margin-top:3px;color:#7fe3ee}
.join-form{
 background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
 border-radius:var(--radius-lg);padding:26px 24px;box-shadow:var(--shadow-lg);
 display:grid;gap:14px;
}
.field{display:grid;gap:7px}
.field label{font-size:13px;font-weight:600;color:rgba(224,240,245,.86)}
.field input,.field select,.field textarea{
 width:100%;min-height:44px;padding:11px 13px;border-radius:10px;
 background:rgba(8,24,37,.55);border:1px solid rgba(255,255,255,.18);
 color:#fff;font-size:14px;outline:none;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.field textarea{min-height:104px;resize:vertical;line-height:1.7}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.38)}
.field input:focus,.field select:focus,.field textarea:focus{border-color:#5fd7e6;box-shadow:0 0 0 3px rgba(95,215,230,.2);background:rgba(8,24,37,.75)}
.field select option{color:#0a1c2b}
.form-note{font-size:12.5px;color:rgba(224,240,245,.6);margin:0;line-height:1.7}
.join-form .btn{width:100%}

/* ---------- footer ---------- */
.site-footer{background:#081726;color:rgba(255,255,255,.66);padding-top:56px;border-top:1px solid rgba(255,255,255,.08)}
.footer-top{display:grid;grid-template-columns:1.7fr 1fr 1fr 1.25fr;gap:36px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:800;letter-spacing:.4px;margin-bottom:14px}
.footer-brand .brand-mark{width:32px;height:32px;border-radius:10px}
.footer-about{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.58);margin:0;max-width:360px}
.footer-col h3{font-size:14px;font-weight:700;color:#fff;margin:2px 0 14px}
.footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.footer-col ul a{font-size:13.5px;color:rgba(255,255,255,.62);transition:color .2s ease}
.footer-col ul a:hover{color:#5fd7e6}
.footer-contact{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.58)}
.footer-contact strong{display:block;font-size:14px;color:#fff;margin-bottom:12px}
.footer-bottom{
 display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
 padding:20px 0 26px;border-top:1px solid rgba(255,255,255,.1);
 font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ---------- responsive ---------- */
@media (max-width:1024px){
 .search{display:none}
 .hero-grid{grid-template-columns:1fr;gap:32px;padding:44px 0 52px}
 .doc-layout{grid-template-columns:1fr;gap:28px}
 .doc-side-inner{position:static;grid-template-columns:1fr 1fr;display:grid}
 .cms-content{padding:30px 26px}
 .card-grid,.matrix-grid{grid-template-columns:repeat(2,1fr)}
 .stat-grid{grid-template-columns:repeat(2,1fr)}
 .join-wrap{grid-template-columns:1fr;gap:30px}
 .footer-top{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:768px){
 .main-nav,.version-chip,.nav-tools .btn{display:none}
 .menu-btn{display:flex}
 .section{padding:52px 0}
 .card-grid,.matrix-grid{grid-template-columns:1fr}
 .spec-row{grid-template-columns:1fr;gap:10px}
 .spec-row .spec-fps{justify-self:start}
 .doc-side-inner{grid-template-columns:1fr}
 .cms-content{padding:24px 20px}
 .cms-content h2{font-size:20px}
 .cms-content h3{font-size:17px}
 .cms-content p,.cms-content li{font-size:15px}
}
@media (max-width:520px){
 .container{padding:0 16px}
 .hero-panel{padding:20px 18px}
 .stat-grid{grid-template-columns:1fr}
 .footer-top{grid-template-columns:1fr}
 .footer-bottom{flex-direction:column;align-items:flex-start}
 .article-hero h1{font-size:24px}
 .btn{width:100%}
 .nav-tools .btn-sm{width:auto}
}

/* roulang page: category1 */
:root{
 --ink:#0a1c2b;
 --ink-2:#0f3346;
 --ink-3:#10485a;
 --teal:#12a3b4;
 --teal-600:#0c8593;
 --teal-100:#e6f6f8;
 --teal-line:#cdeef2;
 --sand:#f4f8fa;
 --line:#e2eaee;
 --text:#17272f;
 --muted:#5c7482;
 --white:#ffffff;
 --gold:#e8b551;
 --gold-deep:#d9a13c;
 --radius:14px;
 --radius-lg:18px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(12,40,58,.05),0 6px 18px rgba(12,40,58,.06);
 --shadow-md:0 12px 30px rgba(12,40,58,.12);
 --shadow-lg:0 20px 48px rgba(8,28,42,.22);
 --max:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul{list-style:none;margin:0;padding:0}
button{font:inherit;border:0;background:none;cursor:pointer}
input{font:inherit}
.site-body{
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.78;color:var(--text);background:#fff;
 -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(10,28,43,.94);
 backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
 border-bottom:1px solid rgba(255,255,255,.08);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.scrolled{box-shadow:0 10px 28px rgba(6,20,32,.34);background:rgba(8,24,37,.97)}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:#fff;flex:0 0 auto}
.brand-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(140deg,#19b6c8,#0c8593);
 box-shadow:0 6px 16px rgba(18,163,180,.38);color:#fff;
}
.brand-text{font-size:16.5px;font-weight:800;letter-spacing:.4px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:6px}
.nav-link{position:relative;font-size:14.5px;font-weight:500;color:rgba(255,255,255,.72);padding:20px 2px;transition:color .2s ease;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:12px;height:2px;border-radius:2px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav-link:hover{color:#fff}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:700}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
 display:flex;align-items:center;gap:8px;height:38px;padding:0 12px;
 border-radius:10px;background:rgba(255,255,255,.08);
 border:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.6);
 transition:border-color .2s ease,background .2s ease;
}
.search:focus-within{border-color:rgba(18,163,180,.8);background:rgba(255,255,255,.12)}
.search input{width:132px;border:0;background:transparent;color:#fff;font-size:13px;outline:none}
.search input::placeholder{color:rgba(255,255,255,.45)}
.version-chip{
 font-size:12px;font-weight:600;color:#9fe6ef;padding:5px 10px;border-radius:999px;
 background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.35);white-space:nowrap;
}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:44px;padding:0 22px;border-radius:10px;
 font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
 white-space:nowrap;
}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 18px rgba(18,163,180,.28)}
.btn-primary:hover{background:var(--teal-600);transform:translateY(-2px);box-shadow:0 14px 26px rgba(18,163,180,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(18,163,180,.3)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--teal-600);border-color:#bfe3e9}
.btn-outline:hover{background:var(--teal-100);transform:translateY(-2px);border-color:var(--teal)}
.btn:focus-visible,.nav-link:focus-visible,a:focus-visible,button:focus-visible{outline:2px solid #5fd7e6;outline-offset:3px;border-radius:6px}
.menu-btn{display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.2);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .22s ease,opacity .22s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{max-height:0;overflow:hidden;transition:max-height .3s ease;background:rgba(8,24,37,.99);border-top:1px solid rgba(255,255,255,.08)}
.mobile-panel.open{max-height:360px}
.mobile-panel .inner{padding:10px 24px 20px;display:flex;flex-direction:column;gap:4px}
.mobile-panel a{color:rgba(255,255,255,.82);font-size:15px;padding:12px 4px;border-bottom:1px solid rgba(255,255,255,.07);border-radius:6px}
.mobile-panel a:hover{color:#fff;background:rgba(255,255,255,.05)}
.mobile-panel a.is-active{color:#5fd7e6;font-weight:700}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:#0a1c2b url('/assets/images/backpic/back-1.gif') center/cover no-repeat}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(112deg,rgba(8,24,37,.96) 0%,rgba(8,26,40,.91) 44%,rgba(11,62,76,.78) 100%)}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:54px;align-items:center;padding:70px 0 78px}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:#8fe3ee;background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.4);padding:7px 14px;border-radius:999px;letter-spacing:.4px}
.hero h1{font-size:37px;line-height:1.34;font-weight:800;color:#fff;margin:20px 0 18px;letter-spacing:.3px}
.hero-lead{font-size:15.5px;line-height:1.9;color:rgba(231,242,246,.82);margin:0;max-width:600px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 26px}
.tag{display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;font-size:13px;color:#cdeef2;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px}
.hero-panel{
 background:rgba(9,31,45,.86);border:1px solid rgba(232,181,81,.28);
 border-radius:var(--radius-lg);padding:26px 24px 20px;
 box-shadow:var(--shadow-lg);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:6px}
.panel-title{font-size:15px;font-weight:700;color:#fff;letter-spacing:.3px;margin:0}
.panel-note{font-size:12px;color:rgba(255,255,255,.48)}
.tier{display:flex;align-items:center;gap:13px;padding:13px 0;border-bottom:1px dashed rgba(255,255,255,.12)}
.tier:last-child{border-bottom:0;padding-bottom:4px}
.tier-badge{
 flex:0 0 auto;width:44px;height:44px;border-radius:13px;display:grid;place-items:center;
 font-size:13px;font-weight:800;color:#231603;
 background:linear-gradient(135deg,#f4d78d,#d9a13c);box-shadow:0 6px 16px rgba(217,161,60,.32);
}
.tier-badge.t2{background:linear-gradient(135deg,#a9e6ef,#4bbccd);color:#06303a;box-shadow:0 6px 16px rgba(75,188,205,.26)}
.tier-badge.t3{background:linear-gradient(135deg,#dce7ee,#a4bac7);color:#1b2f3a;box-shadow:none}
.tier-body strong{display:block;font-size:14px;color:#fff;font-weight:700;line-height:1.5}
.tier-body span{font-size:12.5px;color:rgba(255,255,255,.56);line-height:1.6}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section-sm{padding:56px 0}
.bg-sand{background:var(--sand)}
.bg-white{background:#fff}
.section-head{max-width:740px;margin-bottom:38px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:1.6px;color:var(--teal-600);text-transform:uppercase}
.eyebrow::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--teal)}
.section-head h2{font-size:27px;line-height:1.42;font-weight:800;margin:12px 0 12px;color:var(--ink);letter-spacing:.2px}
.section-head p{font-size:15px;line-height:1.85;color:var(--muted);margin:0}

.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:24px;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.card h3{font-size:17px;font-weight:700;margin:14px 0 8px;color:var(--ink);line-height:1.5}
.card p{font-size:14.5px;line-height:1.78;color:var(--muted);margin:0}
.icon-box{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--teal-100);color:var(--teal-600);border:1px solid var(--teal-line)}
.card-badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;color:var(--teal-600);background:var(--teal-100);border:1px solid var(--teal-line);padding:3px 10px;border-radius:999px;margin-top:14px}

/* fit */
.fit-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:34px;align-items:start}
.fit-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow-md);background:#dbe9ef}
.fit-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
.fit-media figcaption{position:absolute;left:0;right:0;bottom:0;padding:34px 20px 16px;font-size:13px;color:#eaf6f9;background:linear-gradient(180deg,rgba(8,26,40,0),rgba(8,26,40,.86))}
.fit-list{display:flex;flex-direction:column;gap:16px}
.fit-item{
 display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.fit-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.fit-item .dot{flex:0 0 auto;width:10px;height:10px;border-radius:50%;margin-top:9px;background:var(--teal);box-shadow:0 0 0 4px rgba(18,163,180,.14)}
.fit-item h3{font-size:16px;font-weight:700;margin:0 0 6px;color:var(--ink)}
.fit-item p{font-size:14.5px;line-height:1.78;color:var(--muted);margin:0}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{
 position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:30px 22px 24px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.step::before{
 counter-increment:step;content:"0" counter(step);
 position:absolute;top:-14px;left:22px;font-size:12.5px;font-weight:800;letter-spacing:.6px;
 color:#fff;background:var(--teal);padding:4px 11px;border-radius:999px;
 box-shadow:0 6px 14px rgba(18,163,180,.3);
}
.step h3{font-size:16px;font-weight:700;margin:2px 0 8px;color:var(--ink)}
.step p{font-size:14px;line-height:1.78;color:var(--muted);margin:0}

/* dark band */
.band-ink{position:relative;overflow:hidden;background:var(--ink-2) url('/assets/images/backpic/back-4.webp') center/cover no-repeat}
.band-ink::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(8,26,40,.96) 0%,rgba(10,44,60,.92) 55%,rgba(11,62,76,.88) 100%)}
.band-ink .container{position:relative;z-index:2}
.band-ink .section-head h2{color:#fff}
.band-ink .section-head p{color:rgba(255,255,255,.7)}
.band-ink .eyebrow{color:#8fe3ee}
.band-ink .eyebrow::before{background:#8fe3ee}
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{text-align:center;padding:28px 16px;border-radius:var(--radius);background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);transition:transform .2s ease,background .2s ease,border-color .2s ease}
.stat:hover{transform:translateY(-3px);background:rgba(255,255,255,.1);border-color:rgba(95,215,230,.45)}
.stat b{display:block;font-size:30px;font-weight:800;color:#5fd7e6;letter-spacing:.5px;line-height:1.2}
.stat span{display:block;margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.66);line-height:1.7}

/* quotes */
.quote{
 background:#fff;border:1px solid var(--line);border-left:3px solid var(--teal);
 border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.quote:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line);border-left-color:var(--teal-600)}
.quote p{font-size:14.5px;line-height:1.82;color:var(--text);margin:0 0 16px}
.quote .who{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--teal-100);color:var(--teal-600);display:grid;place-items:center;font-weight:700;font-size:13px;border:1px solid var(--teal-line)}

/* audience */
.aud{display:flex;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.aud:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.aud strong{font-size:15.5px;color:var(--ink);font-weight:700}
.aud span{font-size:14px;line-height:1.76;color:var(--muted)}

/* channel */
.channel-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.channel{
 display:flex;flex-direction:column;gap:10px;padding:26px 24px;border-radius:var(--radius-lg);
 background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.channel:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.channel .ch-top{display:flex;align-items:center;justify-content:space-between;gap:12px}
.channel h3{font-size:17px;font-weight:700;margin:0;color:var(--ink)}
.channel p{font-size:14.2px;line-height:1.76;color:var(--muted);margin:0}
.channel .go{font-size:13.5px;font-weight:700;color:var(--teal-600);display:inline-flex;align-items:center;gap:6px;margin-top:4px}
.channel.is-current{background:var(--teal-100);border-color:var(--teal-line)}
.channel.is-current .go{color:var(--muted);font-weight:600}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:900px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:border-color .2s ease,box-shadow .2s ease}
.faq-item:hover{border-color:var(--teal-line)}
.faq-item.open{box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;text-align:left;font-size:15.5px;font-weight:700;color:var(--ink);transition:background .2s ease}
.faq-q:hover{background:var(--teal-100)}
.faq-q .chev{flex:0 0 auto;color:var(--teal-600);transition:transform .25s ease}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a p{padding:0 22px 20px;margin:0;font-size:14.5px;line-height:1.82;color:var(--muted)}
.faq-item.open .faq-a{max-height:340px}

/* cta */
.cta-band{
 position:relative;overflow:hidden;border-radius:var(--radius-lg);padding:44px 40px;
 background:linear-gradient(118deg,rgba(10,28,43,.97),rgba(12,80,96,.94));
 border:1px solid rgba(95,215,230,.28);box-shadow:var(--shadow-lg);
 display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap;
}
.cta-band h2{font-size:25px;font-weight:800;color:#fff;margin:0 0 10px;line-height:1.45}
.cta-band p{font-size:14.5px;line-height:1.8;color:rgba(231,242,246,.78);margin:0;max-width:620px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:64px 0 0;border-top:1px solid rgba(255,255,255,.1);margin-top:0}
.footer-top{display:grid;grid-template-columns:1.5fr .85fr .85fr 1.05fr;gap:40px;padding-bottom:44px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:800;margin-bottom:14px;letter-spacing:.3px}
.footer-about{font-size:14px;line-height:1.82;color:rgba(255,255,255,.6);margin:0;max-width:350px}
.footer-col h3{font-size:14.5px;font-weight:700;color:#fff;margin:0 0 14px}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.64);transition:color .2s ease}
.footer-col a:hover{color:#5fd7e6}
.footer-contact{font-size:13.5px;line-height:1.82;color:rgba(255,255,255,.58)}
.footer-contact strong{display:block;font-size:14.5px;color:#fff;margin-bottom:10px}
.footer-bottom{
 border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
 display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
 font-size:13px;color:rgba(255,255,255,.46);
}

/* ---------- responsive ---------- */
@media (max-width:1100px){
 .hero-grid{gap:38px;padding:56px 0 64px}
 .hero h1{font-size:32px}
 .footer-top{grid-template-columns:1.3fr 1fr 1fr;gap:32px}
 .footer-contact{grid-column:1/-1}
}
@media (max-width:1024px){
 .search{display:none}
 .hero-grid{grid-template-columns:1fr;gap:34px}
 .hero-panel{max-width:560px}
 .grid-4{grid-template-columns:repeat(2,1fr)}
 .steps{grid-template-columns:repeat(2,1fr);gap:26px}
 .stats{grid-template-columns:repeat(2,1fr)}
 .fit-grid{grid-template-columns:1fr;gap:26px}
 .channel-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:900px){
 .main-nav{display:none}
 .menu-btn{display:flex}
 .version-chip{display:none}
 .section{padding:58px 0}
 .section-head h2{font-size:23px}
}
@media (max-width:768px){
 .grid-3{grid-template-columns:1fr}
 .grid-2{grid-template-columns:1fr}
 .hero h1{font-size:27px}
 .hero-lead{font-size:15px}
 .hero-actions .btn{flex:1 1 auto}
 .cta-band{padding:32px 24px}
 .cta-band h2{font-size:21px}
 .footer-top{grid-template-columns:1fr 1fr;gap:28px}
 .footer-about{max-width:none}
}
@media (max-width:520px){
 .container{padding:0 18px}
 .grid-4,.channel-grid,.steps,.stats{grid-template-columns:1fr}
 .hero h1{font-size:24px;line-height:1.4}
 .hero-tags{gap:8px}
 .tag{font-size:12px;padding:5px 11px}
 .section{padding:44px 0}
 .section-head h2{font-size:21px}
 .card,.fit-item,.step,.quote,.aud{padding:20px}
 .faq-q{font-size:14.5px;padding:16px 18px}
 .faq-a p{padding:0 18px 18px}
 .footer-top{grid-template-columns:1fr}
 .footer-bottom{flex-direction:column;gap:8px}
 .nav-wrap{gap:10px}
 .brand-text{font-size:15px}
 .btn-sm{padding:0 12px;font-size:13px}
}

/* roulang page: category3 */
:root{
 --ink:#0a1c2b;
 --ink-2:#0f3346;
 --ink-3:#10485a;
 --teal:#12a3b4;
 --teal-600:#0c8593;
 --teal-100:#e6f6f8;
 --teal-line:#cdeef2;
 --sand:#f4f8fa;
 --line:#e2eaee;
 --text:#17272f;
 --muted:#5c7482;
 --white:#ffffff;
 --radius:14px;
 --radius-lg:18px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(12,40,58,.05),0 6px 18px rgba(12,40,58,.06);
 --shadow-md:0 12px 30px rgba(12,40,58,.12);
 --shadow-lg:0 20px 48px rgba(8,28,42,.22);
 --max:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;padding:0}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer}
input{font-family:inherit;font-size:inherit;color:inherit}
.site-body{
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.78;color:var(--text);background:#fff;
 -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:84px}
/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(10,28,43,.94);
 backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
 border-bottom:1px solid rgba(255,255,255,.08);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.scrolled{box-shadow:0 10px 28px rgba(6,20,32,.34);background:rgba(8,24,37,.97)}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:#fff;flex:0 0 auto}
.brand-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(140deg,#19b6c8,#0c8593);
 box-shadow:0 6px 16px rgba(18,163,180,.38);color:#fff;flex:0 0 auto;
}
.brand-text{font-size:16.5px;font-weight:800;letter-spacing:.4px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:6px}
.nav-link{position:relative;font-size:14.5px;font-weight:500;color:rgba(255,255,255,.72);padding:20px 2px;transition:color .2s ease;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:12px;height:2px;border-radius:2px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav-link:hover{color:#fff}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:700}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
 display:flex;align-items:center;gap:8px;height:38px;padding:0 12px;
 border-radius:10px;background:rgba(255,255,255,.08);
 border:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.6);
 transition:border-color .2s ease,background .2s ease;
}
.search:focus-within{border-color:rgba(18,163,180,.8);background:rgba(255,255,255,.12)}
.search input{width:128px;border:0;background:transparent;color:#fff;font-size:13px;outline:none}
.search input::placeholder{color:rgba(255,255,255,.45)}
.version-chip{
 font-size:12px;font-weight:600;color:#9fe6ef;padding:5px 10px;border-radius:999px;
 background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.35);white-space:nowrap;
}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:44px;padding:0 22px;border-radius:10px;
 font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
 white-space:nowrap;
}
.btn:focus-visible{outline:2px solid #5fd7e6;outline-offset:2px}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 18px rgba(18,163,180,.28)}
.btn-primary:hover{background:var(--teal-600);transform:translateY(-2px);box-shadow:0 14px 26px rgba(18,163,180,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(18,163,180,.3)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--teal-600);border-color:#bfe3e9}
.btn-outline:hover{background:var(--teal-100);transform:translateY(-2px);border-color:var(--teal)}
.menu-btn{display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.2);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .22s ease,opacity .22s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{max-height:0;overflow:hidden;transition:max-height .3s ease;background:rgba(8,24,37,.99);border-top:1px solid rgba(255,255,255,.08)}
.mobile-panel.open{max-height:340px}
.mobile-panel .inner{padding:10px 24px 20px;display:flex;flex-direction:column;gap:4px}
.mobile-panel a{color:rgba(255,255,255,.82);font-size:15px;padding:12px 4px;border-bottom:1px solid rgba(255,255,255,.07);border-radius:6px}
.mobile-panel a:hover{color:#fff;background:rgba(255,255,255,.05)}
.mobile-panel a.is-active{color:#5fd7e6;font-weight:700}
/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:#0a1c2b url('/assets/images/backpic/back-3.webp') center/cover no-repeat}
.hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(112deg,rgba(8,24,37,.96) 0%,rgba(8,26,40,.9) 46%,rgba(11,62,76,.78) 100%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.14fr .86fr;gap:52px;align-items:center;padding:70px 0 76px}
.hero-eyebrow{
 display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
 color:#8fe3ee;background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.4);
 padding:7px 14px;border-radius:999px;letter-spacing:.4px;
}
.hero h1{
 font-size:40px;line-height:1.28;font-weight:800;color:#fff;margin:20px 0 18px;
 letter-spacing:.4px;max-width:660px;
}
.hero-lead{font-size:15.5px;line-height:1.9;color:rgba(231,242,246,.82);max-width:600px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 28px}
.tag{
 display:inline-flex;align-items:center;gap:6px;
 font-size:13px;font-weight:600;color:#b7ecf3;
 background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
 padding:6px 13px;border-radius:999px;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
/* gift panel */
.gift-panel{
 background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.17);
 border-radius:var(--radius-lg);padding:26px 24px 24px;
 backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
 box-shadow:0 24px 50px rgba(4,16,26,.42);
}
.gift-panel-head{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700;color:#fff;letter-spacing:.3px}
.gift-panel-head .dot{width:8px;height:8px;border-radius:50%;background:#4ee0b0;box-shadow:0 0 0 4px rgba(78,224,176,.18)}
.gift-badge{margin-left:auto;font-size:12px;font-weight:600;color:#9fe6ef;background:rgba(18,163,180,.2);border:1px solid rgba(18,163,180,.42);padding:3px 10px;border-radius:999px}
.gift-progress-label{display:flex;align-items:baseline;justify-content:space-between;margin-top:20px;font-size:13px;color:rgba(255,255,255,.66)}
.gift-progress-label strong{font-size:22px;font-weight:800;color:#5fd7e6;letter-spacing:.5px}
.gift-progress{height:10px;border-radius:999px;background:rgba(255,255,255,.14);overflow:hidden;margin:10px 0 20px}
.gift-progress span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#19b6c8,#5fd7e6);box-shadow:0 0 14px rgba(95,215,230,.6)}
.gift-rewards{display:grid;gap:10px;margin-bottom:20px}
.gift-rewards li{
 display:flex;align-items:center;justify-content:space-between;gap:12px;
 font-size:13.5px;color:rgba(255,255,255,.8);
 background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
 border-radius:10px;padding:10px 13px;
}
.gift-rewards b{font-size:12.5px;font-weight:700;color:#5fd7e6;white-space:nowrap}
.gift-rewards li.is-locked b{color:#f0c36a}
.gift-cta{width:100%}
.gift-note{margin-top:14px;font-size:12.5px;line-height:1.7;color:rgba(255,255,255,.5)}
/* ---------- sections ---------- */
.section{padding:76px 0}
.section--sand{background:var(--sand)}
.section--tight{padding:64px 0}
.section-head{max-width:780px;margin-bottom:36px}
.section-kicker{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:800;letter-spacing:2px;color:var(--teal-600)}
.section-kicker::before{content:"";width:24px;height:3px;border-radius:2px;background:var(--teal)}
.section-title{font-size:30px;line-height:1.35;font-weight:800;color:var(--ink);margin:12px 0 12px;letter-spacing:.3px}
.section-sub{font-size:15px;color:var(--muted);line-height:1.88}
.section-head--split{display:flex;align-items:flex-end;justify-content:space-between;gap:28px;max-width:none}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
/* ---------- cards ---------- */
.card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--teal-100)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.card-title{font-size:17px;font-weight:700;color:var(--ink);line-height:1.6;margin-bottom:8px}
.card-text{font-size:14.5px;color:var(--muted);line-height:1.8}
.card-tag{
 align-self:flex-start;margin-top:16px;font-size:12.5px;font-weight:600;
 color:var(--teal-600);background:var(--teal-100);border:1px solid var(--teal-line);
 padding:4px 11px;border-radius:999px;
}
/* plain card */
.mini-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:26px 24px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.mini-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.mini-icon{
 width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
 background:var(--teal-100);color:var(--teal-600);border:1px solid var(--teal-line);margin-bottom:16px;
}
.mini-card h3{font-size:16.5px;font-weight:700;color:var(--ink);margin-bottom:9px}
.mini-card p{font-size:14.5px;color:var(--muted);line-height:1.82}
/* ---------- timeline ---------- */
.timeline{position:relative;display:grid;gap:18px}
.timeline::before{content:"";position:absolute;left:14px;top:14px;bottom:14px;width:2px;background:var(--teal-line)}
.tl-item{position:relative;padding-left:48px}
.tl-item::before{
 content:"";position:absolute;left:7px;top:26px;width:16px;height:16px;border-radius:50%;
 background:#fff;border:3px solid var(--teal);box-shadow:0 0 0 4px rgba(18,163,180,.1);
}
.tl-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:22px 24px;box-shadow:var(--shadow-sm);
 display:grid;grid-template-columns:140px 1fr;gap:22px;align-items:start;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.tl-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.tl-ver{font-size:17px;font-weight:800;color:var(--teal-600);letter-spacing:.4px}
.tl-ver small{display:block;font-size:12.5px;font-weight:600;color:var(--muted);letter-spacing:0;margin-top:4px}
.tl-body h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:7px}
.tl-body p{font-size:14.5px;color:var(--muted);line-height:1.82}
/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.step{
 position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:24px 20px;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.step-num{
 width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
 background:var(--teal-100);border:1px solid var(--teal-line);color:var(--teal-600);
 font-size:15px;font-weight:800;margin-bottom:15px;
}
.step h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:8px}
.step p{font-size:14px;color:var(--muted);line-height:1.8}
/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:28px 22px;text-align:center;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.stat:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.stat-num{font-size:32px;font-weight:800;color:var(--teal-600);letter-spacing:.6px;line-height:1.2}
.stat-label{font-size:13.5px;color:var(--muted);margin-top:8px;line-height:1.7}
/* ---------- audience ---------- */
.audience{
 display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.aud{
 background:linear-gradient(180deg,#ffffff 0%,#f9fdfe 100%);
 border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;
 box-shadow:var(--shadow-sm);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.aud:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.aud h3{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:10px}
.aud p{font-size:14.5px;color:var(--muted);line-height:1.82}
.aud ul{margin-top:16px;display:grid;gap:9px}
.aud li{position:relative;padding-left:18px;font-size:14px;color:var(--text);line-height:1.7}
.aud li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--teal)}
/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{
 display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.news-card h3{font-size:16px;font-weight:700;color:var(--ink);line-height:1.6}
.news-card p{font-size:14px;color:var(--muted);line-height:1.78}
.news-meta{
 display:flex;align-items:center;justify-content:space-between;gap:12px;
 margin-top:auto;padding-top:12px;border-top:1px dashed var(--line);
 font-size:12.5px;color:#8a9bab;
}
.news-meta span{color:var(--teal-600);font-weight:600}
.empty-note{
 padding:26px 24px;background:#fff;border:1px dashed var(--line);
 border-radius:var(--radius);color:var(--muted);font-size:14.5px;text-align:center;
}
/* ---------- faq ---------- */
.faq{display:grid;gap:14px;max-width:920px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease}
.faq-item:hover{border-color:var(--teal-line)}
.faq-item.open{box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.faq-q{
 width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
 padding:19px 22px;font-size:16px;font-weight:700;color:var(--ink);text-align:left;line-height:1.6;
}
.faq-q .ico{
 flex:0 0 auto;width:24px;height:24px;border-radius:50%;
 background:var(--teal-100);color:var(--teal-600);border:1px solid var(--teal-line);
 display:grid;place-items:center;font-size:15px;font-weight:700;line-height:1;
 transition:transform .22s ease,background .22s ease;
}
.faq-item.open .faq-q .ico{transform:rotate(45deg);background:var(--teal);color:#fff;border-color:var(--teal)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:420px}
.faq-a p{padding:0 22px 20px;font-size:14.5px;line-height:1.88;color:var(--muted)}
/* ---------- cta ---------- */
.cta-band{
 position:relative;overflow:hidden;
 background:linear-gradient(118deg,#0a1c2b 0%,#10485a 58%,#0c8593 100%);
 border-radius:var(--radius-lg);padding:44px 46px;
 display:flex;align-items:center;justify-content:space-between;gap:34px;
 box-shadow:var(--shadow-lg);
}
.cta-band::after{
 content:"";position:absolute;right:-60px;top:-60px;width:280px;height:280px;border-radius:50%;
 background:radial-gradient(circle,rgba(95,215,230,.22) 0%,rgba(95,215,230,0) 70%);
}
.cta-band h2{position:relative;z-index:2;font-size:26px;font-weight:800;color:#fff;line-height:1.4;letter-spacing:.3px}
.cta-band p{position:relative;z-index:2;margin-top:10px;font-size:14.5px;color:rgba(231,242,246,.78);line-height:1.85;max-width:620px}
.cta-actions{position:relative;z-index:2;display:flex;flex-wrap:wrap;gap:12px;flex:0 0 auto}
/* ---------- footer ---------- */
.site-footer{background:#0a1c2b;color:rgba(255,255,255,.7);padding:56px 0 26px}
.footer-top{
 display:grid;grid-template-columns:1.5fr .8fr .8fr 1.05fr;gap:36px;
 padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:800;margin-bottom:14px;letter-spacing:.3px}
.footer-about{font-size:13.5px;line-height:1.88;color:rgba(255,255,255,.6);max-width:350px}
.footer-col h3{font-size:14px;font-weight:700;color:#fff;margin-bottom:14px;letter-spacing:.6px}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:13.5px;color:rgba(255,255,255,.62);transition:color .2s ease}
.footer-col a:hover{color:#5fd7e6}
.footer-contact{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6)}
.footer-contact strong{display:block;color:#fff;font-size:14px;margin-bottom:10px;letter-spacing:.4px}
.footer-bottom{
 display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
 padding-top:22px;font-size:12.5px;color:rgba(255,255,255,.45);line-height:1.8;
}
/* ---------- responsive ---------- */
@media (max-width:1180px){
 .main-nav{gap:16px}
 .search input{width:100px}
}
@media (max-width:1080px){
 .search{display:none}
 .hero h1{font-size:36px}
}
@media (max-width:980px){
 .main-nav{display:none}
 .menu-btn{display:flex}
 .hero-grid{grid-template-columns:1fr;gap:36px;padding:54px 0 62px}
 .hero h1{font-size:32px;max-width:none}
 .hero-lead{max-width:none}
 .grid-3,.grid-4,.steps,.stats,.news-grid,.audience{grid-template-columns:repeat(2,1fr)}
 .footer-top{grid-template-columns:1fr 1fr;gap:28px}
 .section{padding:60px 0}
 .section-head--split{flex-direction:column;align-items:flex-start;gap:16px}
 .cta-band{flex-direction:column;align-items:flex-start;padding:34px 28px}
 .tl-card{grid-template-columns:1fr;gap:10px}
}
@media (max-width:640px){
 .container{padding:0 18px}
 .hero h1{font-size:27px;line-height:1.35}
 .hero-lead{font-size:14.5px}
 .section{padding:50px 0}
 .section--tight{padding:44px 0}
 .section-title{font-size:23px}
 .grid-2,.grid-3,.grid-4,.steps,.stats,.news-grid,.audience{grid-template-columns:1fr}
 .nav-tools .btn-sm{display:none}
 .version-chip{display:none}
 .footer-top{grid-template-columns:1fr;gap:26px}
 .footer-bottom{flex-direction:column;align-items:flex-start}
 .cta-band{padding:30px 22px;border-radius:var(--radius)}
 .cta-band h2{font-size:21px}
 .tl-item{padding-left:38px}
 .tl-card{padding:20px 18px}
 .gift-panel{padding:22px 18px}
 .mini-card{padding:22px 20px}
 .btn{min-height:42px}
}

/* roulang page: category2 */
:root{
 --ink:#0a1c2b;
 --ink-2:#0f3346;
 --ink-3:#10485a;
 --teal:#12a3b4;
 --teal-600:#0c8593;
 --teal-100:#e6f6f8;
 --teal-line:#cdeef2;
 --sand:#f4f8fa;
 --line:#e2eaee;
 --text:#17272f;
 --muted:#5c7482;
 --white:#ffffff;
 --radius:14px;
 --radius-lg:18px;
 --radius-sm:10px;
 --shadow-sm:0 1px 2px rgba(12,40,58,.05),0 6px 18px rgba(12,40,58,.06);
 --shadow-md:0 12px 30px rgba(12,40,58,.12);
 --shadow-lg:0 20px 48px rgba(8,28,42,.22);
 --max:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0}
.site-body{
 font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
 font-size:16px;line-height:1.78;color:var(--text);background:#fff;
 -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;font-size:inherit;border:0;background:none;cursor:pointer}
input,textarea,select{font-family:inherit;font-size:inherit;color:inherit}
p{margin:0}
h1,h2,h3,h4{margin:0;line-height:1.32;letter-spacing:.2px}
ul{margin:0;padding:0;list-style:none}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,summary:focus-visible{
 outline:3px solid rgba(18,163,180,.55);outline-offset:2px;border-radius:8px;
}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:80;
 background:rgba(10,28,43,.94);
 backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
 border-bottom:1px solid rgba(255,255,255,.08);
 transition:box-shadow .25s ease,background .25s ease;
}
.site-header.scrolled{box-shadow:0 10px 28px rgba(6,20,32,.34);background:rgba(8,24,37,.97)}
.nav-wrap{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;color:#fff;flex:0 0 auto}
.brand-mark{
 width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
 background:linear-gradient(140deg,#19b6c8,#0c8593);
 box-shadow:0 6px 16px rgba(18,163,180,.38);color:#fff;flex:0 0 auto;
}
.brand-text{font-size:16.5px;font-weight:800;letter-spacing:.4px;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:22px;margin-left:6px}
.nav-link{position:relative;font-size:14.5px;font-weight:500;color:rgba(255,255,255,.72);padding:20px 2px;transition:color .2s ease;white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:12px;height:2px;border-radius:2px;background:var(--teal);transform:scaleX(0);transform-origin:left;transition:transform .22s ease}
.nav-link:hover{color:#fff}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:#fff;font-weight:700}
.nav-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.search{
 display:flex;align-items:center;gap:8px;height:38px;padding:0 12px;
 border-radius:10px;background:rgba(255,255,255,.08);
 border:1px solid rgba(255,255,255,.14);color:rgba(255,255,255,.6);
 transition:border-color .2s ease,background .2s ease;
}
.search:focus-within{border-color:rgba(18,163,180,.8);background:rgba(255,255,255,.12)}
.search input{width:132px;border:0;background:transparent;color:#fff;font-size:13px;outline:none}
.search input::placeholder{color:rgba(255,255,255,.45)}
.version-chip{
 font-size:12px;font-weight:600;color:#9fe6ef;padding:5px 10px;border-radius:999px;
 background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.35);white-space:nowrap;
}
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:44px;padding:0 22px;border-radius:10px;
 font-size:15px;font-weight:600;cursor:pointer;border:1px solid transparent;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease,border-color .2s ease;
 white-space:nowrap;
}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--teal);color:#fff;box-shadow:0 8px 18px rgba(18,163,180,.28)}
.btn-primary:hover{background:var(--teal-600);transform:translateY(-2px);box-shadow:0 14px 26px rgba(18,163,180,.34)}
.btn-primary:active{transform:translateY(0);box-shadow:0 6px 14px rgba(18,163,180,.3)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-ghost:hover{background:rgba(255,255,255,.18);transform:translateY(-2px)}
.btn-outline{background:#fff;color:var(--teal-600);border-color:#bfe3e9}
.btn-outline:hover{background:var(--teal-100);transform:translateY(-2px);border-color:var(--teal)}
.menu-btn{display:none;width:42px;height:42px;border-radius:10px;border:1px solid rgba(255,255,255,.2);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.menu-btn span{display:block;width:18px;height:2px;border-radius:2px;background:#fff;transition:transform .22s ease,opacity .22s ease}
.menu-btn[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn[aria-expanded="true"] span:nth-child(2){opacity:0}
.menu-btn[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.mobile-panel{max-height:0;overflow:hidden;transition:max-height .3s ease;background:rgba(8,24,37,.99);border-top:1px solid rgba(255,255,255,.08)}
.mobile-panel.open{max-height:340px}
.mobile-panel .inner{padding:10px 24px 20px;display:flex;flex-direction:column;gap:4px}
.mobile-panel a{color:rgba(255,255,255,.82);font-size:15px;padding:12px 4px;border-bottom:1px solid rgba(255,255,255,.07);border-radius:6px}
.mobile-panel a:hover{color:#fff;background:rgba(255,255,255,.05)}
.mobile-panel a.is-active{color:#5fd7e6;font-weight:700}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;background:#0a1c2b url('/assets/images/backpic/back-2.webp') center/cover no-repeat}
.hero::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(112deg,rgba(8,24,37,.96) 0%,rgba(8,26,40,.9) 46%,rgba(11,62,76,.72) 100%);
}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.08fr .92fr;gap:46px;align-items:center;padding:70px 0 78px}
.hero-eyebrow{
 display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;
 color:#8fe3ee;background:rgba(18,163,180,.16);border:1px solid rgba(18,163,180,.4);
 padding:7px 14px;border-radius:999px;letter-spacing:.4px;
}
.hero h1{
 font-size:38px;line-height:1.3;font-weight:800;color:#fff;margin:20px 0 16px;
 max-width:660px;
}
.hero-lead{font-size:15.5px;line-height:1.9;color:rgba(231,242,246,.82);max-width:600px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:24px 0 26px}
.tag{
 display:inline-flex;align-items:center;gap:6px;padding:6px 13px;border-radius:999px;
 font-size:13px;font-weight:600;color:#9fe6ef;background:rgba(18,163,180,.14);
 border:1px solid rgba(18,163,180,.38);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}

/* zone map panel */
.zone-map{
 position:relative;background:rgba(9,32,46,.74);border:1px solid rgba(255,255,255,.15);
 border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow-lg);
 backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.zone-map::before{
 content:"";position:absolute;inset:0;border-radius:var(--radius-lg);pointer-events:none;
 background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
 background-size:36px 36px;opacity:.7;
}
.zone-map > *{position:relative;z-index:1}
.zone-map-head{display:flex;align-items:baseline;justify-content:space-between;gap:10px;margin-bottom:14px}
.zone-map-head span:first-child{font-size:14px;font-weight:800;color:#fff;letter-spacing:.6px}
.zone-map-hint{font-size:12px;color:rgba(255,255,255,.5)}
.zone-pin{
 display:flex;align-items:center;gap:12px;padding:13px 14px;border-radius:12px;
 background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);
 margin-bottom:10px;transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.zone-pin:last-child{margin-bottom:0}
.zone-pin:hover{transform:translateY(-3px);background:rgba(18,163,180,.18);border-color:rgba(18,163,180,.5);box-shadow:0 12px 24px rgba(4,18,28,.4)}
.pin-dot{width:9px;height:9px;border-radius:50%;background:var(--teal);box-shadow:0 0 0 4px rgba(18,163,180,.22);flex:0 0 auto}
.pin-body{display:flex;flex-direction:column;gap:2px;min-width:0}
.pin-body strong{font-size:14.5px;font-weight:700;color:#fff}
.pin-body small{font-size:12.5px;color:rgba(255,255,255,.58);line-height:1.5}
.pin-lv{
 margin-left:auto;font-size:11.5px;font-weight:700;color:#9fe6ef;
 background:rgba(18,163,180,.18);border:1px solid rgba(18,163,180,.4);
 border-radius:999px;padding:3px 9px;white-space:nowrap;
}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section--sand{background:var(--sand);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section--ink{
 background:linear-gradient(160deg,#0a1c2b 0%,#0f3346 62%,#10485a 100%);
 color:#fff;
}
.section-head{max-width:760px;margin-bottom:38px}
.kicker{
 display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
 letter-spacing:1.2px;color:var(--teal-600);text-transform:uppercase;
 background:var(--teal-100);border:1px solid var(--teal-line);border-radius:999px;padding:5px 12px;
}
.section-head h2{font-size:29px;font-weight:800;color:var(--ink);margin:14px 0 12px}
.section-head p{font-size:15px;color:var(--muted);line-height:1.85}
.section--ink .kicker{color:#9fe6ef;background:rgba(18,163,180,.16);border-color:rgba(18,163,180,.42)}
.section--ink .section-head h2{color:#fff}
.section--ink .section-head p{color:rgba(226,240,244,.78)}

.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}

.card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);padding:24px;
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.card h3{font-size:17px;font-weight:800;color:var(--ink);margin:14px 0 8px}
.card p{font-size:14.5px;color:var(--muted);line-height:1.78}
.icon-badge{
 width:42px;height:42px;border-radius:12px;display:grid;place-items:center;
 background:var(--teal-100);border:1px solid var(--teal-line);color:var(--teal-600);
}
.mini-tag{
 display:inline-flex;align-items:center;font-size:12px;font-weight:600;color:var(--teal-600);
 background:var(--teal-100);border:1px solid var(--teal-line);border-radius:999px;padding:3px 10px;margin-top:14px;
}

/* principles split */
.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:44px;align-items:center}
.split-figure{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--line)}
.split-figure img{width:100%;aspect-ratio:4/3;object-fit:cover}
.split-figure::after{
 content:"";position:absolute;inset:0;
 background:linear-gradient(180deg,rgba(10,28,43,0) 45%,rgba(10,28,43,.62) 100%);
}
.figure-caption{
 position:absolute;left:18px;bottom:16px;z-index:2;color:#fff;font-size:13.5px;font-weight:600;letter-spacing:.3px;
}
.principle-list{display:flex;flex-direction:column;gap:16px}
.principle{
 display:flex;gap:14px;padding:18px;border-radius:var(--radius);
 background:#fff;border:1px solid var(--line);box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.principle:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.principle .icon-badge{width:38px;height:38px;border-radius:11px;flex:0 0 auto}
.principle h3{font-size:16px;font-weight:800;color:var(--ink);margin:2px 0 6px}
.principle p{font-size:14px;color:var(--muted);line-height:1.75}

/* steps */
.step-flow{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
 position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:24px 20px 22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.step-num{
 width:36px;height:36px;border-radius:50%;display:grid;place-items:center;
 background:var(--teal-100);border:1px solid var(--teal-line);
 color:var(--teal-600);font-weight:800;font-size:15px;
}
.step h3{font-size:16.5px;font-weight:800;color:var(--ink);margin:14px 0 8px}
.step p{font-size:14px;color:var(--muted);line-height:1.75}
.step-meta{display:block;margin-top:12px;font-size:12.5px;font-weight:600;color:var(--teal-600)}

/* ratio cards */
.ratio-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.ratio-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.ratio-level{
 display:inline-flex;font-size:12px;font-weight:700;color:var(--teal-600);
 background:var(--teal-100);border:1px solid var(--teal-line);border-radius:999px;padding:4px 11px;
}
.ratio-card h3{font-size:17px;font-weight:800;color:var(--ink);margin:12px 0 6px}
.ratio-value{font-size:13.5px;font-weight:700;color:var(--ink-3)}
.ratio-bar{height:6px;border-radius:999px;background:#eef3f6;overflow:hidden;margin:12px 0 14px}
.ratio-bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#1fc0d2,#0c8593)}
.ratio-card p{font-size:14px;color:var(--muted);line-height:1.75}
.ratio-meta{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.chip{
 font-size:12px;font-weight:600;color:var(--ink-3);background:#eef5f7;
 border:1px solid #dceae e;border-radius:999px;padding:3px 10px;
}

/* zones */
.zone-card{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 overflow:hidden;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.zone-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.zone-card figure{margin:0;position:relative;overflow:hidden}
.zone-card img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .35s ease}
.zone-card:hover img{transform:scale(1.04)}
.zone-badge{
 position:absolute;left:14px;top:14px;z-index:2;font-size:12px;font-weight:700;
 color:#fff;background:rgba(10,28,43,.72);border:1px solid rgba(255,255,255,.28);
 border-radius:999px;padding:4px 11px;backdrop-filter:blur(4px);
}
.zone-body{padding:20px}
.zone-body h3{font-size:17px;font-weight:800;color:var(--ink);margin:0 0 8px}
.zone-body p{font-size:14px;color:var(--muted);line-height:1.75}
.zone-body ul{margin-top:12px;display:flex;flex-direction:column;gap:6px}
.zone-body li{position:relative;padding-left:16px;font-size:13.5px;color:var(--ink-3);line-height:1.7}
.zone-body li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--teal)}

/* metrics */
.metric-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.metric{
 border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.05);
 border-radius:var(--radius);padding:24px;transition:background .2s ease,transform .2s ease,border-color .2s ease;
}
.metric:hover{background:rgba(255,255,255,.09);border-color:rgba(18,163,180,.55);transform:translateY(-3px)}
.metric strong{display:block;font-size:32px;font-weight:800;color:#5fd7e6;line-height:1.2;letter-spacing:.5px}
.metric span{display:block;margin-top:8px;font-size:13.5px;color:rgba(226,240,244,.75);line-height:1.65}

/* voices */
.voice{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 padding:24px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.voice:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.voice-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
 width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
 font-weight:800;font-size:15px;color:#fff;background:linear-gradient(140deg,#19b6c8,#0c8593);flex:0 0 auto;
}
.voice-head strong{display:block;font-size:14.5px;color:var(--ink)}
.voice-head small{display:block;font-size:12.5px;color:var(--muted)}
.voice p{font-size:14.5px;color:var(--muted);line-height:1.8}

/* news list */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.news-card{
 display:flex;flex-direction:column;gap:10px;background:#fff;border:1px solid var(--line);
 border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--teal-line)}
.news-tag{align-self:flex-start;font-size:12px;font-weight:700;color:var(--teal-600);background:var(--teal-100);border:1px solid var(--teal-line);border-radius:999px;padding:3px 10px}
.news-card h3{font-size:16.5px;font-weight:800;color:var(--ink);line-height:1.55}
.news-card p{font-size:14px;color:var(--muted);line-height:1.72}
.news-date{margin-top:auto;font-size:12.5px;color:#8aa0ac}
.news-empty{grid-column:1/-1;padding:28px;text-align:center;color:var(--muted);background:#fff;border:1px dashed var(--line);border-radius:var(--radius);font-size:14.5px}

/* faq */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px}
.faq-item{
 background:#fff;border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:var(--teal-line);box-shadow:var(--shadow-md)}
.faq-item summary{
 list-style:none;cursor:pointer;position:relative;
 padding:18px 54px 18px 20px;font-size:15.5px;font-weight:700;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
 content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
 width:24px;height:24px;line-height:21px;text-align:center;border-radius:8px;
 background:var(--teal-100);border:1px solid var(--teal-line);color:var(--teal-600);
 font-weight:700;font-size:16px;
}
.faq-item[open] summary::after{content:"−"}
.faq-body{padding:0 20px 20px;font-size:14.5px;color:var(--muted);line-height:1.8}

/* cta */
.cta-section{position:relative;overflow:hidden;background:#0a1c2b url('/assets/images/backpic/back-6.webp') center/cover no-repeat;color:#fff}
.cta-section::after{content:"";position:absolute;inset:0;background:linear-gradient(120deg,rgba(8,24,37,.96),rgba(11,62,76,.86))}
.cta-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}
.cta-grid h2{font-size:29px;font-weight:800;color:#fff;margin:14px 0 14px}
.cta-grid > div p{font-size:15px;color:rgba(226,240,244,.8);line-height:1.85}
.cta-list{margin-top:20px;display:flex;flex-direction:column;gap:10px}
.cta-list li{position:relative;padding-left:22px;font-size:14.5px;color:rgba(226,240,244,.85)}
.cta-list li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;background:var(--teal);transform:rotate(45deg)}
.cta-form{
 background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.18);
 border-radius:var(--radius-lg);padding:26px;backdrop-filter:blur(8px);
}
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:700;color:rgba(255,255,255,.82);margin-bottom:7px;letter-spacing:.3px}
.field input,.field textarea{
 width:100%;padding:11px 14px;border-radius:10px;font-size:14px;
 background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);color:#fff;
 transition:border-color .2s ease,background .2s ease;
}
.field textarea{min-height:96px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:rgba(255,255,255,.42)}
.field input:focus,.field textarea:focus{border-color:var(--teal);background:rgba(255,255,255,.16);outline:none}
.form-hint{margin-top:12px;font-size:12.5px;color:rgba(226,240,244,.62);line-height:1.7}
.form-note{margin-top:10px;font-size:13px;font-weight:600;color:#7ee3ef;min-height:20px}

/* ---------- footer ---------- */
.site-footer{background:#08192a;color:rgba(226,240,244,.72);padding:58px 0 0;border-top:1px solid rgba(255,255,255,.08)}
.footer-top{display:grid;grid-template-columns:1.5fr .8fr .8fr 1.1fr;gap:36px;padding-bottom:42px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-size:16px;font-weight:800;letter-spacing:.4px}
.footer-about{margin-top:14px;font-size:14px;line-height:1.85;color:rgba(226,240,244,.62);max-width:420px}
.footer-col h3{font-size:14px;font-weight:800;color:#fff;margin:0 0 14px;letter-spacing:.6px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:14px;color:rgba(226,240,244,.66);transition:color .2s ease}
.footer-col a:hover{color:#5fd7e6}
.footer-contact{font-size:13.5px;line-height:1.85;color:rgba(226,240,244,.62)}
.footer-contact strong{display:block;color:#fff;font-size:14px;margin-bottom:10px;letter-spacing:.6px}
.footer-bottom{
 display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;
 padding:20px 0 26px;border-top:1px solid rgba(255,255,255,.1);
 font-size:12.5px;color:rgba(226,240,244,.48);
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
 .hero-grid{grid-template-columns:1fr;gap:36px;padding:58px 0 64px}
 .hero h1{font-size:33px}
 .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
 .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
 .step-flow{grid-template-columns:repeat(2,minmax(0,1fr))}
 .metric-row{grid-template-columns:repeat(2,minmax(0,1fr))}
 .split{grid-template-columns:1fr;gap:32px}
 .cta-grid{grid-template-columns:1fr;gap:32px}
 .footer-top{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
 .footer-contact{grid-column:1/-1}
 .search{display:none}
}
@media (max-width:900px){
 .main-nav{display:none}
 .menu-btn{display:flex}
 .version-chip{display:none}
 .news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .section{padding:58px 0}
 .section-head h2{font-size:25px}
}
@media (max-width:640px){
 .container{padding:0 18px}
 .hero h1{font-size:27px}
 .hero-lead{font-size:14.5px}
 .hero-grid{padding:44px 0 52px}
 .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
 .step-flow{grid-template-columns:1fr}
 .metric-row{grid-template-columns:1fr}
 .news-grid{grid-template-columns:1fr}
 .footer-top{grid-template-columns:1fr;gap:26px}
 .footer-bottom{flex-direction:column;align-items:flex-start}
 .cta-form{padding:20px}
 .btn{min-height:44px}
 .brand-text{font-size:14.5px}
 .zone-pin{padding:11px 12px}
}
@media (max-width:520px){
 .hero h1{font-size:24px}
 .cta-grid h2{font-size:24px}
 .section-head h2{font-size:22px}
}