:root {
  --ink: #07162b;
  --ink-2: #0d2440;
  --surface: #102d4b;
  --surface-2: #15395d;
  --line: rgba(183, 221, 255, .16);
  --text: #eaf5ff;
  --muted: #96b2cc;
  --cyan: #61e6df;
  --cyan-2: #24b8ca;
  --violet: #7f8cff;
  --white: #fff;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--ink);
  color: var(--text);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(7, 22, 43, .86); backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(183, 221, 255, .1);
}
.nav-wrap { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 700; letter-spacing: .02em; }
.brand img { width: 38px; height: 38px; }
.brand span { font-size: 15px; white-space: nowrap; }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { padding: 10px 13px; color: var(--muted); border-radius: 8px; font-size: 14px; transition: .2s ease; }
.main-nav a:hover, .main-nav a.active { color: var(--white); background: rgba(97, 230, 223, .11); }
.menu-toggle { display: none; background: transparent; border: 1px solid var(--line); color: var(--text); border-radius: 8px; width: 42px; height: 42px; }

.hero { position: relative; overflow: hidden; padding: 92px 0 72px; }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(2px); pointer-events: none; }
.hero::before { width: 540px; height: 540px; right: -180px; top: -180px; background: radial-gradient(circle, rgba(127, 140, 255, .28), transparent 68%); }
.hero::after { width: 460px; height: 460px; left: -260px; bottom: -260px; background: radial-gradient(circle, rgba(36, 184, 202, .2), transparent 66%); }
.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.02fr .98fr; align-items: center; gap: 56px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--cyan); text-transform: uppercase; letter-spacing: .14em; font-size: 12px; font-weight: 700; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--cyan); }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(40px, 6vw, 72px); line-height: 1.08; letter-spacing: -.045em; margin: 18px 0 20px; max-width: 670px; }
.hero-copy p { color: var(--muted); max-width: 570px; font-size: 17px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 18px; border-radius: 8px; border: 1px solid var(--line); font-weight: 700; font-size: 14px; transition: transform .2s ease, background .2s ease, border-color .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--cyan); color: #05202d; border-color: var(--cyan); }
.btn-primary:hover { background: #83f0ea; }
.btn-ghost:hover { border-color: rgba(97, 230, 223, .6); background: rgba(97, 230, 223, .08); }
.hero-note { display: flex; gap: 28px; margin-top: 38px; color: var(--muted); font-size: 13px; }
.hero-note strong { display: block; color: var(--text); font-size: 18px; }

.device-stage { min-height: 430px; position: relative; display: grid; place-items: center; }
.device-glow { position: absolute; width: 360px; height: 360px; background: radial-gradient(circle, rgba(97, 230, 223, .23), transparent 68%); }
.phone { position: relative; width: 250px; height: 500px; border: 8px solid #1c426b; border-radius: 36px; background: linear-gradient(160deg, #183e67, #09192d 70%); box-shadow: 0 30px 80px rgba(0,0,0,.36), inset 0 0 0 1px rgba(255,255,255,.12); transform: rotate(8deg); }
.phone::before { content: ""; position: absolute; width: 90px; height: 16px; border-radius: 0 0 12px 12px; background: #0b1d34; top: -8px; left: 50%; transform: translateX(-50%); }
.phone-screen { position: absolute; inset: 18px 13px; border-radius: 24px; padding: 18px 14px; background: linear-gradient(180deg, #0f2e4d, #0b2037 70%); overflow: hidden; }
.screen-top { display: flex; justify-content: space-between; align-items: center; font-size: 11px; color: #a6cad8; }
.screen-title { margin-top: 22px; font-size: 26px; font-weight: 800; letter-spacing: -.05em; }
.screen-card { margin-top: 18px; border: 1px solid rgba(97,230,223,.25); border-radius: 14px; padding: 14px; background: linear-gradient(140deg, rgba(97,230,223,.18), rgba(127,140,255,.1)); }
.ladder { height: 86px; margin: 16px 8px 6px; position: relative; background: repeating-linear-gradient(to bottom, transparent 0 13px, rgba(255,255,255,.75) 13px 16px); }
.ladder::before, .ladder::after { content: ""; position: absolute; top: 0; bottom: 0; width: 6px; border-radius: 4px; background: var(--cyan); }
.ladder::before { left: 22px; transform: rotate(12deg); }
.ladder::after { right: 22px; transform: rotate(-12deg); }
.screen-stats { display: grid; grid-template-columns: repeat(2,1fr); gap: 8px; margin-top: 14px; }
.stat { border-radius: 10px; padding: 10px; background: rgba(255,255,255,.06); font-size: 10px; color: var(--muted); }
.stat strong { display: block; color: var(--text); font-size: 18px; }
.float-chip { position: absolute; right: 0; top: 28px; border: 1px solid rgba(97,230,223,.35); padding: 10px 13px; border-radius: 10px; background: rgba(11, 38, 63, .9); color: var(--cyan); font-size: 12px; }
.float-chip.two { left: 8px; right: auto; top: auto; bottom: 28px; color: #b9c0ff; border-color: rgba(127,140,255,.4); }

.section { padding: 78px 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 30px; }
.section-kicker { color: var(--cyan); font-size: 12px; letter-spacing: .13em; text-transform: uppercase; font-weight: 700; }
.section h2 { margin: 9px 0 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.15; letter-spacing: -.035em; }
.section-intro { color: var(--muted); max-width: 590px; margin: 12px 0 0; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.card { border: 1px solid var(--line); border-radius: 10px; background: linear-gradient(145deg, rgba(21,57,93,.72), rgba(10,31,54,.86)); padding: 24px; transition: transform .2s ease, border-color .2s ease; }
.card:hover { transform: translateY(-4px); border-color: rgba(97,230,223,.48); }
.card-icon { width: 42px; height: 42px; display: grid; place-items: center; border-radius: 10px; color: var(--cyan); background: rgba(97,230,223,.11); margin-bottom: 18px; }
.card h3 { margin: 0 0 8px; font-size: 20px; }
.card p { color: var(--muted); font-size: 14px; margin-bottom: 16px; }
.text-link { color: var(--cyan); font-size: 13px; font-weight: 700; }
.text-link::after { content: "  →"; }
.feature { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; align-items: stretch; }
.feature-panel { padding: 30px; border: 1px solid var(--line); border-radius: 10px; background: linear-gradient(140deg, rgba(21,57,93,.7), rgba(11,28,49,.9)); }
.checklist { display: grid; gap: 12px; margin-top: 22px; }
.check { display: flex; gap: 11px; align-items: flex-start; color: var(--muted); font-size: 14px; }
.check b { color: var(--cyan); font-size: 15px; }
.mini-dashboard { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.metric { padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: rgba(4,17,32,.34); }
.metric strong { display: block; font-size: 30px; letter-spacing: -.05em; }
.metric span { color: var(--muted); font-size: 12px; }

.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.article-card { overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: #0c2743; }
.article-card img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-bottom: 1px solid var(--line); }
.article-body { padding: 18px; }
.article-meta { display: flex; gap: 10px; color: var(--muted); font-size: 12px; margin-bottom: 10px; }
.tag { color: var(--cyan); }
.article-body h3 { margin-bottom: 8px; font-size: 18px; line-height: 1.35; }
.article-body p { color: var(--muted); font-size: 13px; margin-bottom: 15px; }
.topic-strip { padding: 22px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.topic-list { display: flex; flex-wrap: wrap; gap: 10px; }
.topic { padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: 12px; }

.page-hero { padding: 62px 0 46px; border-bottom: 1px solid var(--line); background: linear-gradient(120deg, rgba(21,57,93,.56), transparent 65%); }
.page-hero h1 { font-size: clamp(34px, 5vw, 56px); margin-bottom: 14px; }
.breadcrumb { color: var(--muted); font-size: 13px; }
.breadcrumb a { color: var(--cyan); }
.listing { padding: 50px 0 84px; }
.listing-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-bottom: 24px; }
.listing-toolbar p { color: var(--muted); margin: 0; font-size: 14px; }
.search { min-height: 42px; width: min(280px, 100%); border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.04); color: var(--text); padding: 0 13px; outline: none; }
.search:focus { border-color: var(--cyan); }
.article-layout { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; padding: 50px 0 86px; }
.article-main { border: 1px solid var(--line); border-radius: 10px; background: rgba(12,39,67,.74); padding: clamp(22px, 4vw, 46px); }
.article-main h1 { font-size: clamp(32px, 5vw, 54px); margin: 14px 0; }
.article-lead { color: #bdd2e6; font-size: 17px; }
.article-cover { margin: 28px 0; border-radius: 8px; width: 100%; }
.article-main h2 { font-size: 25px; margin: 34px 0 12px; }
.article-main h3 { font-size: 19px; margin: 24px 0 8px; }
.article-main p, .article-main li { color: #b7cadc; font-size: 16px; }
.article-main ul { padding-left: 20px; }
.aside { display: grid; gap: 16px; position: sticky; top: 96px; }
.aside .card { padding: 20px; }
.related-list { display: grid; gap: 13px; }
.related-list a { color: var(--muted); font-size: 13px; line-height: 1.4; }
.related-list a:hover { color: var(--cyan); }
.article-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 34px; }
.article-nav a { border: 1px solid var(--line); border-radius: 8px; padding: 13px; color: var(--muted); font-size: 13px; }
.article-nav a:hover { border-color: rgba(97,230,223,.4); color: var(--text); }

.faq-list { display: grid; gap: 12px; }
details { border: 1px solid var(--line); border-radius: 8px; background: rgba(12,39,67,.7); padding: 0 18px; }
summary { cursor: pointer; padding: 18px 0; font-weight: 700; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; float: right; color: var(--cyan); font-size: 20px; line-height: 1; }
details[open] summary::after { content: "−"; }
details p { color: var(--muted); font-size: 14px; padding: 0 0 18px; margin: 0; }

.site-footer { margin-top: 20px; padding: 32px 0 22px; background: radial-gradient(circle at 86% 8%, rgba(127,140,255,.14), transparent 27%), linear-gradient(180deg, #06182c 0%, #041120 70%); border-top: 1px solid rgba(97,230,223,.18); position: relative; overflow: hidden; }
.site-footer::before { content: ""; position: absolute; left: 8%; right: 8%; top: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan), var(--violet), transparent); opacity: .85; }
.site-footer::after { content: ""; position: absolute; inset: 80px 0 auto; height: 180px; pointer-events: none; opacity: .25; background-image: linear-gradient(rgba(183,221,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(183,221,255,.06) 1px, transparent 1px); background-size: 44px 44px; mask-image: linear-gradient(90deg, transparent, black 20%, black 80%, transparent); }
.footer-orbit { position: absolute; border: 1px solid rgba(97,230,223,.12); border-radius: 50%; pointer-events: none; }
.footer-orbit-one { width: 380px; height: 380px; right: -170px; top: -120px; }
.footer-orbit-two { width: 240px; height: 240px; left: -150px; bottom: -120px; border-color: rgba(127,140,255,.12); }
.footer-signal { position: relative; z-index: 1; display: flex; align-items: center; gap: 16px; padding: 18px 20px; margin-bottom: 42px; border: 1px solid rgba(97,230,223,.2); border-radius: 10px; background: linear-gradient(90deg, rgba(25,76,102,.38), rgba(20,42,76,.5)); box-shadow: inset 0 1px 0 rgba(255,255,255,.05); }
.footer-signal-mark { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; gap: 3px; border-radius: 9px; background: rgba(97,230,223,.1); }
.footer-signal-mark span { width: 3px; border-radius: 3px; background: var(--cyan); }
.footer-signal-mark span:nth-child(1) { height: 10px; opacity: .55; }.footer-signal-mark span:nth-child(2) { height: 18px; }.footer-signal-mark span:nth-child(3) { height: 13px; opacity: .75; }
.footer-signal-kicker { color: var(--cyan); font-size: 11px; letter-spacing: .12em; text-transform: uppercase; }
.footer-signal-title { margin-top: 3px; color: var(--white); font-size: 16px; font-weight: 700; }
.footer-signal-link { margin-left: auto; display: inline-flex; align-items: center; gap: 8px; color: var(--text); font-size: 13px; font-weight: 700; white-space: nowrap; }
.footer-signal-link span { color: var(--cyan); font-size: 18px; transition: transform .2s ease; }.footer-signal-link:hover span { transform: translate(2px, -2px); }
.footer-top { position: relative; z-index: 1; display: grid; grid-template-columns: 1.3fr 1fr 1fr 1fr; gap: 34px; }
.footer-brand p { color: var(--muted); max-width: 300px; font-size: 14px; }
.footer-brand-note { display: flex; align-items: center; gap: 8px; color: #7fa3bb; font-size: 11px; }
.footer-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(97,230,223,.08); }
.footer-title { color: var(--white); font-size: 13px; font-weight: 700; margin-bottom: 15px; letter-spacing: .04em; }
.footer-links { display: grid; gap: 9px; }
.footer-links a { color: var(--muted); font-size: 13px; }
.footer-links a:hover { color: var(--cyan); }
.footer-metrics { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 42px 0 28px; }
.footer-metric { position: relative; overflow: hidden; border: 1px solid rgba(183,221,255,.14); border-radius: 8px; padding: 16px; background: linear-gradient(145deg, rgba(17,61,91,.42), rgba(9,29,52,.48)); }
.footer-metric::after { content: ""; position: absolute; width: 74px; height: 74px; right: -26px; bottom: -30px; border: 1px solid rgba(97,230,223,.18); border-radius: 50%; }
.footer-metric strong { display: block; color: var(--cyan); font-size: 22px; letter-spacing: -.03em; }
.footer-metric span { color: var(--muted); font-size: 11px; }
.footer-metric b { display: block; margin-top: 10px; color: #5d829c; font-size: 9px; letter-spacing: .18em; font-weight: 700; }
.footer-bottom { position: relative; z-index: 1; display: flex; justify-content: space-between; gap: 14px; padding-top: 18px; border-top: 1px solid rgba(183,221,255,.12); color: #7593ae; font-size: 12px; }
.footer-bottom-links { display: inline-flex; gap: 16px; }.footer-bottom a { color: #9ab4cb; }.footer-bottom a:hover { color: var(--cyan); }

@media (max-width: 900px) {
  .main-nav { position: absolute; left: 20px; right: 20px; top: 68px; display: none; flex-direction: column; align-items: stretch; padding: 10px; border: 1px solid var(--line); border-radius: 10px; background: #0a2038; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; }
  .menu-toggle { display: inline-grid; place-items: center; }
  .hero-grid, .feature, .article-layout { grid-template-columns: 1fr; }
  .device-stage { min-height: 420px; }
  .aside { position: static; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-signal { align-items: flex-start; flex-wrap: wrap; }
  .footer-signal-link { margin-left: 52px; }
}
@media (max-width: 620px) {
  .container { width: min(var(--max), calc(100% - 28px)); }
  .nav-wrap { height: 68px; }
  .brand span { font-size: 13px; }
  .hero { padding: 66px 0 54px; }
  h1 { font-size: clamp(38px, 13vw, 58px); }
  .hero-note { gap: 18px; }
  .grid-3, .grid-2, .article-grid { grid-template-columns: 1fr; }
  .section { padding: 58px 0; }
  .section-head, .listing-toolbar, .footer-bottom { align-items: flex-start; flex-direction: column; }
  .search { width: 100%; }
  .phone { transform: rotate(4deg) scale(.9); }
  .float-chip { right: -2px; }
  .footer-top { grid-template-columns: 1fr; gap: 26px; }
  .footer-metrics { grid-template-columns: repeat(2, 1fr); margin-top: 30px; }
  .footer-signal { padding: 16px; margin-bottom: 32px; }
  .footer-signal-title { font-size: 15px; }
  .footer-signal-link { margin-left: 52px; }
  .footer-bottom-links { flex-wrap: wrap; gap: 10px 14px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; } }