:root {
  --bg: #0b1315;
  --bg-soft: #101c1e;
  --bg-card: #13211f;
  --line: rgba(255, 255, 255, 0.08);
  --accent: #00c9b7;
  --accent-deep: #00a896;
  --accent-dim: rgba(0, 201, 183, 0.12);
  --text: #e8efee;
  --text-sub: #9db1af;
  --radius: 14px;
  --shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background-color: var(--bg);
  background-image:
    radial-gradient(ellipse 1200px 700px at 70% -180px, rgba(0, 201, 183, 0.10) 0%, transparent 65%),
    radial-gradient(ellipse 1000px 600px at 10% 35%, rgba(0, 201, 183, 0.05) 0%, transparent 55%),
    radial-gradient(ellipse 1100px 600px at 85% 105vh, rgba(0, 201, 183, 0.06) 0%, transparent 55%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
i { line-height: 1; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.container-narrow { max-width: 780px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 26px; border-radius: 10px; border: none; cursor: pointer;
  font-size: 16px; font-weight: 600; transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn i { font-size: 1.15em; }
.btn-primary {
  background: var(--accent); color: #06211e;
  box-shadow: 0 6px 22px rgba(0, 201, 183, 0.28);
}
.btn-primary:hover { background: #0fdcc9; transform: translateY(-2px); box-shadow: 0 10px 28px rgba(0, 201, 183, 0.36); }
.btn-sm { padding: 8px 18px; font-size: 14px; border-radius: 8px; }
.btn-lg { padding: 15px 36px; font-size: 17px; border-radius: 12px; }
.btn-block { width: 100%; }

.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  background: rgba(11, 19, 21, 0.72);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s ease, background .25s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); background: rgba(11, 19, 21, 0.9); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { border-radius: 8px; }
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: .5px; }
.brand-name i { font-style: normal; color: var(--accent); }
.main-nav { display: flex; align-items: center; gap: 28px; }
.main-nav > a { font-size: 15px; color: var(--text-sub); transition: color .18s ease; }
.main-nav > a:hover { color: var(--text); }
.main-nav > a.nav-download,
.main-nav > a.nav-download:hover { margin-left: 4px; color: #fff; }
.main-nav > a.nav-download:hover { background: var(--accent-deep); }
.nav-toggle { display: none; background: none; border: none; color: var(--text); font-size: 26px; cursor: pointer; }

.hero { padding: 140px 0 60px; position: relative; overflow: hidden; }
.hero-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--accent-dim); border: 1px solid rgba(0, 201, 183, 0.25);
  color: var(--accent); font-size: 13.5px; margin-bottom: 22px;
}
.hero h1 { font-size: clamp(34px, 5vw, 52px); line-height: 1.25; font-weight: 800; letter-spacing: 1px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-desc { margin: 20px 0 30px; color: var(--text-sub); font-size: 17px; max-width: 480px; }
.hero-actions { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; }
.hero-ver { display: flex; flex-direction: column; gap: 4px; font-size: 13.5px; color: var(--text-sub); }
.hero-ver i { color: var(--accent); margin-right: 4px; vertical-align: -1px; }

.hero-showcase { position: relative; display: flex; justify-content: center; }
.phone {
  width: 272px; border-radius: 34px; overflow: hidden; position: relative;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow), 0 0 60px rgba(0, 201, 183, 0.12);
  background: #000;
}
.phone-slides { position: relative; aspect-ratio: 532 / 936; }
.phone-slides img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  opacity: 0; transition: opacity .6s ease;
}
.phone-slides img.active { opacity: 1; }
.phone-notch {
  position: absolute; top: 8px; left: 50%; transform: translateX(-50%);
  width: 90px; height: 22px; border-radius: 12px; background: #0b1315; z-index: 2; opacity: .92;
}
.phone-dots { position: absolute; bottom: 12px; left: 0; right: 0; display: flex; justify-content: center; gap: 7px; z-index: 2; }
.phone-dots .dot {
  width: 8px; height: 8px; border-radius: 50%; border: none; cursor: pointer;
  background: rgba(255, 255, 255, 0.35); transition: all .2s ease; padding: 0;
}
.phone-dots .dot.active { background: var(--accent); width: 20px; border-radius: 5px; }
.cap-strip { padding: 26px 0 10px; }
.cap-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  padding: 24px 20px;
}
.cap-item { display: flex; align-items: center; gap: 14px; }
.cap-item > i {
  font-size: 26px; color: var(--accent);
  width: 52px; height: 52px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-dim); border-radius: 12px; flex-shrink: 0;
}
.cap-item strong { display: block; font-size: 15.5px; }
.cap-item span { font-size: 13px; color: var(--text-sub); }

.section { padding: 88px 0; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head-left { text-align: left; }
.sec-tag {
  display: inline-block; padding: 4px 14px; border-radius: 999px; margin-bottom: 14px;
  background: var(--accent-dim); color: var(--accent); font-size: 13px; letter-spacing: 2px;
}
.sec-head h2 { font-size: clamp(26px, 3.6vw, 36px); font-weight: 800; letter-spacing: 1px; }
.sec-head p { margin-top: 12px; color: var(--text-sub); }

.fade-up { opacity: 1; }
.js .fade-up { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.js .fade-up.visible { opacity: 1; transform: none; }

.feature-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; align-items: stretch; }
.feature-big {
  background: linear-gradient(160deg, rgba(0, 201, 183, 0.10), rgba(0, 201, 183, 0.02) 55%), var(--bg-card);
  border: 1px solid rgba(0, 201, 183, 0.22); border-radius: var(--radius);
  padding: 36px 34px; display: flex; flex-direction: column;
}
.fb-icon {
  width: 56px; height: 56px; border-radius: 14px; margin-bottom: 20px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent); color: #06211e; font-size: 28px;
  box-shadow: 0 8px 24px rgba(0, 201, 183, 0.3);
}
.feature-big h3 { font-size: 23px; margin-bottom: 12px; }
.feature-big > p { color: var(--text-sub); margin-bottom: 22px; }
.fb-list { list-style: none; margin-top: auto; display: flex; flex-direction: column; gap: 10px; font-size: 15px; }
.fb-list i { color: var(--accent); margin-right: 8px; vertical-align: -2px; }
.feature-sm-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.feature-sm {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; transition: border-color .2s ease, transform .2s ease;
}
.feature-sm:hover { border-color: rgba(0, 201, 183, 0.4); transform: translateY(-3px); }
.feature-sm > i { font-size: 26px; color: var(--accent); }
.feature-sm h3 { font-size: 17px; margin: 12px 0 8px; }
.feature-sm p { font-size: 14px; color: var(--text-sub); line-height: 1.65; }
.feature-sm-grid .feature-sm:last-child { grid-column: 1 / -1; }
.feature-sm-wide { display: flex; align-items: center; gap: 18px; }
.feature-sm-wide > i { margin: 0; }
.feature-sm-wide h3 { margin: 0 0 4px; }

.cat-tabs { display: flex; justify-content: center; gap: 10px; margin-bottom: 34px; flex-wrap: wrap; }
.cat-tab {
  padding: 9px 26px; border-radius: 999px; border: 1px solid var(--line);
  background: transparent; color: var(--text-sub); font-size: 15px; cursor: pointer;
  transition: all .2s ease;
}
.cat-tab:hover { color: var(--text); border-color: rgba(0, 201, 183, 0.4); }
.cat-tab.active { background: var(--accent); border-color: var(--accent); color: #06211e; font-weight: 600; }
.cat-panel { display: none; }
.cat-panel.active { display: block; animation: fadeIn .35s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.cat-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.cat-card {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 22px; transition: border-color .2s ease;
}
.cat-card:hover { border-color: rgba(0, 201, 183, 0.4); }
.cat-card > i { font-size: 28px; color: var(--accent); }
.cat-card h4 { font-size: 16.5px; margin: 14px 0 8px; }
.cat-card p { font-size: 13.5px; color: var(--text-sub); line-height: 1.65; }

.community-inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; align-items: center; }
.community-inner .sec-head { margin-bottom: 0; }
.community-inner .sec-head p { max-width: 400px; }
.feed { display: flex; flex-direction: column; gap: 14px; }
.feed-item {
  display: flex; gap: 14px; padding: 18px 20px;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius);
  transition: transform .2s ease, border-color .2s ease;
}
.feed-item:nth-child(even) { transform: translateX(18px); }
.feed-item:hover { border-color: rgba(0, 201, 183, 0.4); }
.avatar {
  width: 42px; height: 42px; border-radius: 50%; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 16px; color: #06211e;
}
.av-1 { background: #00c9b7; } .av-2 { background: #5eead4; } .av-3 { background: #86efac; } .av-4 { background: #a7f3d0; }
.feed-meta { font-size: 14px; margin-bottom: 6px; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.feed-meta strong { font-size: 15px; }
.tag { font-style: normal; font-size: 12px; padding: 1px 9px; border-radius: 999px; }
.t-gonglue { background: rgba(0, 201, 183, 0.16); color: var(--accent); }
.t-zudui { background: rgba(110, 231, 183, 0.14); color: #6ee7b7; }
.t-ceping { background: rgba(253, 224, 71, 0.14); color: #fde047; }
.feed-body > p:last-child { font-size: 14.5px; color: var(--text-sub); }

.section-dl {
  background:
    radial-gradient(ellipse 800px 400px at 20% 0%, rgba(0, 201, 183, 0.08), transparent 60%),
    var(--bg-soft);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.dl-inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.dl-copy h2 { font-size: clamp(24px, 3vw, 32px); margin-bottom: 14px; }
.dl-copy > p { color: var(--text-sub); margin-bottom: 28px; }
.dl-alt { margin-top: 14px; font-size: 13.5px; color: var(--text-sub); }
.dl-alt a { color: var(--accent); border-bottom: 1px dashed var(--accent); }
.dl-info table {
  width: 100%; border-collapse: collapse;
  background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden;
}
.dl-info th, .dl-info td { padding: 14px 20px; text-align: left; font-size: 14.5px; border-bottom: 1px solid var(--line); }
.dl-info tr:last-child th, .dl-info tr:last-child td { border-bottom: none; }
.dl-info th { color: var(--text-sub); font-weight: 400; width: 40%; }
.dl-info td { font-weight: 600; }
.dl-safe { margin-top: 16px; font-size: 13px; color: var(--text-sub); padding: 12px 16px; border-left: 3px solid var(--accent); background: var(--accent-dim); border-radius: 0 8px 8px 0; }
.dl-safe i { color: var(--accent); margin-right: 6px; }

.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card); border: 1px solid var(--line); border-radius: 12px;
  overflow: hidden; transition: border-color .2s ease;
}
.faq-item[open] { border-color: rgba(0, 201, 183, 0.4); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 18px 22px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  font-size: 15.5px; font-weight: 600;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i { color: var(--accent); font-size: 20px; transition: transform .25s ease; flex-shrink: 0; }
.faq-item[open] summary i { transform: rotate(180deg); }
.faq-item > p { padding: 0 22px 18px; font-size: 14.5px; color: var(--text-sub); }

.site-footer { border-top: 1px solid var(--line); background: #08100f; padding: 56px 0 0; margin-bottom: 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { margin-top: 16px; font-size: 14px; color: var(--text-sub); max-width: 340px; }
.footer-col { display: flex; flex-direction: column; gap: 10px; }
.footer-col h3 { font-size: 15px; margin-bottom: 6px; }
.footer-col a { font-size: 14px; color: var(--text-sub); transition: color .18s ease; }
.footer-col a:hover { color: var(--accent); }
.footer-ver { font-size: 13px; color: var(--text-sub); opacity: .7; }
.footer-bottom {
  border-top: 1px solid var(--line); padding: 18px 20px;
  display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-sub);
}
.footer-bottom a { color: var(--text-sub); }
.beian { opacity: .75; }

.back-top {
  position: fixed; right: 22px; bottom: 96px; z-index: 40;
  width: 44px; height: 44px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg-card); color: var(--accent); font-size: 22px; cursor: pointer;
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: all .25s ease;
}
.back-top.show { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { border-color: var(--accent); }
.dl-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 45;
  display: none; align-items: center; justify-content: space-between; gap: 14px;
  padding: 10px 16px calc(10px + env(safe-area-inset-bottom));
  background: rgba(11, 19, 21, 0.94); backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
}
.dl-bar-info strong { display: block; font-size: 14.5px; }
.dl-bar-info span { font-size: 12px; color: var(--text-sub); }
.dl-bar .btn { padding: 10px 22px; font-size: 14.5px; }

.qr-modal { position: fixed; inset: 0; z-index: 100; display: flex; align-items: center; justify-content: center; padding: 20px; }
.qr-modal[hidden] { display: none; }
.qr-mask { position: absolute; inset: 0; background: rgba(5, 10, 11, 0.78); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.qr-card {
  position: relative; z-index: 1; width: 340px; max-width: 92vw;
  background: var(--bg-card); border: 1px solid rgba(0, 201, 183, 0.3);
  border-radius: 18px; padding: 30px 28px 24px; text-align: center;
  box-shadow: var(--shadow); animation: qrPop .25s ease;
}
@keyframes qrPop { from { opacity: 0; transform: scale(.94) translateY(10px); } to { opacity: 1; transform: none; } }
.qr-close {
  position: absolute; top: 12px; right: 12px; width: 34px; height: 34px;
  border: none; border-radius: 10px; background: transparent; color: var(--text-sub);
  font-size: 22px; cursor: pointer; transition: color .18s ease, background .18s ease;
}
.qr-close:hover { color: var(--text); background: rgba(255, 255, 255, 0.06); }
.qr-card h3 { font-size: 18px; margin-bottom: 18px; }
.qr-img-wrap {
  display: inline-block; padding: 10px; background: #fff; border-radius: 12px;
  box-shadow: 0 0 0 1px rgba(0, 201, 183, 0.25), 0 0 40px rgba(0, 201, 183, 0.15);
}
.qr-img-wrap img { display: block; }
.qr-tip { margin-top: 14px; font-size: 13.5px; color: var(--text-sub); }
.qr-tip i { color: var(--accent); margin-right: 4px; vertical-align: -2px; }
.qr-meta { margin-top: 4px; font-size: 12.5px; color: var(--text-sub); opacity: .75; }
.qr-direct {
  display: inline-block; margin-top: 16px; padding: 9px 20px;
  border: 1px solid var(--line); border-radius: 10px; font-size: 13.5px; color: var(--text-sub);
  transition: border-color .18s ease, color .18s ease;
}
.qr-direct:hover { border-color: var(--accent); color: var(--accent); }

.nf-wrap { min-height: 72vh; display: flex; align-items: center; text-align: center; }
.nf-icon { font-size: 72px; line-height: 1; color: var(--accent); }
.nf-title { margin: 20px 0 12px; font-size: 30px; }
.nf-desc { color: var(--text-sub); margin-bottom: 30px; }

@media (max-width: 960px) {
  .hero { padding: 120px 0 40px; }
  .hero-inner { grid-template-columns: 1fr; gap: 40px; text-align: center; }
  .hero-copy { display: flex; flex-direction: column; align-items: center; }
  .hero-actions { justify-content: center; }
  .hero-ver { align-items: center; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-layout { grid-template-columns: 1fr; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .community-inner { grid-template-columns: 1fr; gap: 40px; }
  .community-inner .sec-head { text-align: center; }
  .community-inner .sec-head p { max-width: none; }
  .feed-item:nth-child(even) { transform: none; }
  .dl-inner { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .main-nav {
    position: fixed; top: 64px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: rgba(11, 19, 21, 0.97); border-bottom: 1px solid var(--line);
    padding: 8px 20px 16px; display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav > a { padding: 13px 4px; border-bottom: 1px solid var(--line); font-size: 15.5px; }
  .main-nav > a:last-child { border-bottom: none; margin-top: 12px; }
  .nav-toggle { display: block; }
  .cap-grid { grid-template-columns: 1fr; gap: 14px; }
  .feature-sm-grid { grid-template-columns: 1fr; }
  .feature-sm-wide { flex-direction: column; align-items: flex-start; }
  .cat-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .dl-bar { display: flex; }
  .back-top { bottom: 78px; right: 14px; }
  .section { padding: 64px 0; }
  .qr-card { padding: 26px 20px 20px; }
}