/* ============================================
   云游鸟 SWB · 主站首页样式 (site/css/main.css)
   高端大气 · 深色渐变 · 文旅 SaaS
   ============================================ */
:root {
  --bg: #070b16; --bg-2: #0d1428; --text: #f1f5f9; --muted: #94a3b8;
  --accent: #7dd3fc; --accent-2: #a78bfa; --gold: #f5d78a;
  --green: #5eead4; --pink: #f9a8d4;
  --line: rgba(148, 163, 184, 0.14);
  --card: rgba(255, 255, 255, 0.04); --card-border: rgba(255, 255, 255, 0.08);
  --nav-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --radius: 20px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  background:
    radial-gradient(1100px 600px at 85% -10%, rgba(125, 211, 252, 0.12), transparent 60%),
    radial-gradient(900px 550px at 5% 110%, rgba(167, 139, 250, 0.10), transparent 60%),
    radial-gradient(700px 400px at 50% 50%, rgba(94, 234, 212, 0.05), transparent 60%),
    linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
  color: var(--text);
  min-height: 100vh;
  letter-spacing: 0.02em;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
::selection { background: rgba(125, 211, 252, 0.3); color: #fff; }

/* ===== 导航栏 ===== */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  height: var(--nav-h); padding: 0 48px;
  background: rgba(7, 11, 22, 0.4);
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: all 0.4s var(--ease);
}
nav.scrolled {
  background: rgba(7, 11, 22, 0.85);
  border-bottom-color: var(--line);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
}
.nav-logo { display: flex; align-items: center; gap: 12px; font-size: 16px; letter-spacing: 0.2em; color: var(--text); text-decoration: none; }
.nav-logo img { width: 34px; height: 34px; border-radius: 9px; transition: transform 0.4s var(--ease); }
.nav-logo:hover img { transform: rotate(8deg) scale(1.06); }
.nav-links { display: flex; gap: 34px; }
.nav-links a {
  color: var(--muted); text-decoration: none; font-size: 14px;
  letter-spacing: 0.08em; transition: color 0.3s; position: relative;
  padding: 6px 2px;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0;
  width: 0; height: 1px; background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.35s var(--ease);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { width: 100%; }
.hamburger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  padding: 10px; background: none; border: none; z-index: 110;
}
.hamburger span {
  display: block; width: 24px; height: 2px; border-radius: 2px;
  background: var(--text); transition: all 0.35s var(--ease);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 105;
  width: min(300px, 82vw); padding: 96px 32px 32px;
  background: rgba(7, 11, 22, 0.96); backdrop-filter: blur(20px);
  border-left: 1px solid var(--line);
  transform: translateX(100%); transition: transform 0.45s var(--ease);
  display: flex; flex-direction: column; gap: 6px;
}
.drawer.open { transform: translateX(0); }
.drawer a {
  color: var(--muted); text-decoration: none; font-size: 16px;
  letter-spacing: 0.12em; padding: 14px 8px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.08);
  transition: color 0.3s, padding-left 0.3s;
}
.drawer a:hover { color: var(--accent); padding-left: 16px; }
.drawer .drawer-divider { height: 1px; background: rgba(128,128,128,0.2); margin: 8px 0; }
.drawer-backdrop {
  position: fixed; inset: 0; z-index: 104; background: rgba(0, 0, 0, 0.5);
  opacity: 0; pointer-events: none; transition: opacity 0.4s;
  backdrop-filter: blur(2px);
}
.drawer-backdrop.show { opacity: 1; pointer-events: auto; }

/* ===== 首屏 Hero ===== */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center; padding: calc(var(--nav-h) + 40px) 24px 80px; position: relative;
  overflow: hidden;
}
.stars {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    radial-gradient(1.5px 1.5px at 20% 30%, rgba(255,255,255,0.35), transparent 100%),
    radial-gradient(1px 1px at 40% 70%, rgba(255,255,255,0.25), transparent 100%),
    radial-gradient(1.8px 1.8px at 60% 20%, rgba(125,211,252,0.35), transparent 100%),
    radial-gradient(1px 1px at 75% 55%, rgba(255,255,255,0.22), transparent 100%),
    radial-gradient(1.5px 1.5px at 88% 32%, rgba(167,139,250,0.35), transparent 100%),
    radial-gradient(1px 1px at 12% 62%, rgba(255,255,255,0.2), transparent 100%),
    radial-gradient(1.3px 1.3px at 50% 82%, rgba(94,234,212,0.25), transparent 100%),
    radial-gradient(1px 1px at 30% 12%, rgba(255,255,255,0.28), transparent 100%);
  animation: twinkle 5s ease-in-out infinite alternate;
}
@keyframes twinkle { from { opacity: 0.6; } to { opacity: 1; } }
.glow {
  position: absolute; border-radius: 50%; filter: blur(90px); pointer-events: none;
  opacity: 0.5; animation: drift 16s ease-in-out infinite alternate;
}
.glow-1 { width: 480px; height: 480px; top: -120px; left: -80px; background: rgba(125, 211, 252, 0.16); }
.glow-2 { width: 420px; height: 420px; bottom: -100px; right: -60px; background: rgba(167, 139, 250, 0.16); animation-delay: -6s; }
.glow-3 { width: 300px; height: 300px; top: 40%; left: 55%; background: rgba(94, 234, 212, 0.10); animation-delay: -11s; }
@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.1); }
  100% { transform: translate(-30px, 25px) scale(0.95); }
}
.hero-inner { position: relative; z-index: 2; }
.logo-img {
  width: 112px; height: 112px; border-radius: 30px; margin-bottom: 38px;
  box-shadow: 0 20px 60px rgba(125, 211, 252, 0.25), 0 0 40px rgba(125, 211, 252, 0.12);
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
.brand {
  font-size: 13px; letter-spacing: 0.7em; color: var(--gold);
  margin-bottom: 30px; text-transform: uppercase; opacity: 0.9;
}
.brand .dot {
  display: inline-block; width: 5px; height: 5px; border-radius: 50%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  vertical-align: middle; margin: 0 16px;
  box-shadow: 0 0 8px rgba(125, 211, 252, 0.8);
}
h1 {
  font-size: clamp(44px, 8vw, 88px); font-weight: 300;
  letter-spacing: 0.14em; line-height: 1.12; margin-bottom: 24px;
}
h1 strong {
  font-weight: 500;
  background: linear-gradient(120deg, var(--accent), var(--accent-2), var(--gold));
  background-size: 200% 100%;
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  animation: shimmer 6s ease-in-out infinite;
}
@keyframes shimmer { 0%, 100% { background-position: 0% 50%; } 50% { background-position: 100% 50%; } }
.en {
  font-size: 12px; letter-spacing: 0.55em; color: var(--muted);
  margin-bottom: 42px; text-transform: uppercase;
}
.tagline {
  font-size: clamp(18px, 3vw, 25px); font-weight: 300; color: #e2e8f0;
  letter-spacing: 0.06em; margin-bottom: 56px;
}
.hero-cta { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }
.btn {
  padding: 15px 44px; border-radius: 50px; text-decoration: none;
  font-size: 15px; letter-spacing: 0.12em; transition: all 0.35s var(--ease);
  border: 1px solid transparent; cursor: pointer; display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary {
  background: linear-gradient(120deg, rgba(125, 211, 252, 0.92), rgba(167, 139, 250, 0.92));
  color: #0a0f1e; font-weight: 500;
  box-shadow: 0 8px 24px rgba(125, 211, 252, 0.25);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 36px rgba(125, 211, 252, 0.4);
}
.btn-primary:active { transform: translateY(-1px); }
.btn-ghost { border-color: var(--line); color: var(--text); background: rgba(255, 255, 255, 0.03); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-3px); background: rgba(125, 211, 252, 0.06); }
.scroll-hint {
  position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
  color: var(--muted); font-size: 11px; letter-spacing: 0.35em; opacity: 0.7;
  z-index: 2;
}
.scroll-hint .mouse {
  width: 24px; height: 38px; margin: 12px auto 0; border-radius: 14px;
  border: 1.5px solid var(--muted); position: relative;
}
.scroll-hint .mouse::after {
  content: ""; position: absolute; top: 7px; left: 50%; transform: translateX(-50%);
  width: 3px; height: 7px; border-radius: 3px; background: var(--accent);
  animation: wheel 1.8s ease-in-out infinite;
}
@keyframes wheel {
  0% { opacity: 1; transform: translate(-50%, 0); }
  70% { opacity: 0; transform: translate(-50%, 12px); }
  100% { opacity: 0; }
}

/* ===== 通用区块 ===== */
section { padding: 110px 48px; position: relative; }
.section-label {
  font-size: 12px; letter-spacing: 0.5em; color: var(--accent);
  text-transform: uppercase; margin-bottom: 18px; text-align: center;
}
.section-title {
  font-size: clamp(30px, 4.5vw, 48px); font-weight: 400;
  letter-spacing: 0.1em; text-align: center; margin-bottom: 20px;
}
.section-title::after {
  content: ""; display: block; width: 64px; height: 2px; margin: 24px auto 0;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  border-radius: 2px;
}
.section-sub {
  max-width: 640px; margin: 0 auto 64px; text-align: center;
  color: var(--muted); font-size: 15px; line-height: 1.9; letter-spacing: 0.04em;
}

/* ===== 数据统计 ===== */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  max-width: 1080px; margin: 0 auto;
}
.stat {
  text-align: center; padding: 44px 24px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--card-border);
  transition: all 0.4s var(--ease);
}
.stat:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(125, 211, 252, 0.12); border-color: rgba(125, 211, 252, 0.3); }
.stat .num {
  font-size: clamp(36px, 4vw, 52px); font-weight: 300; line-height: 1;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  margin-bottom: 14px;
}
.stat .num small { font-size: 22px; -webkit-text-fill-color: var(--gold); margin-left: 2px; }
.stat .label { color: var(--muted); font-size: 14px; letter-spacing: 0.12em; }

/* ===== 品牌故事 ===== */
.story {
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 64px; align-items: center;
  max-width: 1080px; margin: 0 auto;
}
.story-text h3 { font-size: 24px; font-weight: 400; letter-spacing: 0.06em; margin-bottom: 28px; color: var(--text); }
.story-text p { font-size: 15px; line-height: 2; color: var(--muted); margin-bottom: 14px; letter-spacing: 0.03em; }
.story-words { display: flex; flex-direction: column; gap: 20px; }
.word-card {
  display: flex; align-items: center; gap: 18px; padding: 24px 28px;
  border-radius: 16px; background: var(--card); border: 1px solid var(--card-border);
  transition: all 0.35s var(--ease);
}
.word-card:hover { transform: translateX(6px); border-color: rgba(125, 211, 252, 0.3); }
.word-card b { font-size: 20px; font-weight: 500; letter-spacing: 0.1em; min-width: 110px; }
.word-card span { color: var(--accent); font-size: 14px; letter-spacing: 0.1em; }
.word-card .cn { color: var(--muted); font-size: 13px; flex: 1; text-align: right; }

/* ===== 平台特色 ===== */
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 1080px; margin: 0 auto; }
.feature {
  padding: 40px 32px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--card-border);
  transition: all 0.4s var(--ease);
}
.feature:hover { transform: translateY(-8px); border-color: rgba(167, 139, 250, 0.35); box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3); }
.feature-icon { font-size: 40px; margin-bottom: 22px; display: inline-block; }
.feature h3 { font-size: 18px; font-weight: 500; letter-spacing: 0.05em; margin-bottom: 14px; }
.feature p { font-size: 14px; color: var(--muted); line-height: 1.9; }

/* ===== 商城 ===== */
.mall-banner {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  max-width: 1080px; margin: 0 auto 48px; padding: 48px 56px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(125, 211, 252, 0.12), rgba(167, 139, 250, 0.12));
  border: 1px solid rgba(125, 211, 252, 0.2);
}
.mall-banner-text h3 { font-size: 26px; font-weight: 500; letter-spacing: 0.04em; margin-bottom: 16px; }
.mall-banner-text p { color: var(--muted); font-size: 15px; margin-bottom: 26px; line-height: 1.8; }
.mall-banner-emoji { font-size: 88px; animation: float 4s ease-in-out infinite; }
.mall-features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; max-width: 1080px; margin: 0 auto; }
.mall-feat {
  text-align: center; padding: 36px 20px; border-radius: 18px;
  background: var(--card); border: 1px solid var(--card-border); transition: all 0.4s var(--ease);
}
.mall-feat:hover { transform: translateY(-6px); border-color: rgba(125, 211, 252, 0.3); }
.mall-feat span { font-size: 34px; display: block; margin-bottom: 14px; }
.mall-feat b { font-size: 16px; display: block; margin-bottom: 8px; font-weight: 500; }
.mall-feat p { font-size: 13px; color: var(--muted); line-height: 1.7; }

/* ===== 愿景 ===== */
.vision {
  max-width: 860px; margin: 0 auto; text-align: center; padding: 48px 40px;
  border-radius: 24px; background: var(--card); border: 1px solid var(--card-border);
  position: relative; overflow: hidden;
}
.vision::before {
  content: ""; position: absolute; top: -60%; left: -40%; width: 180%; height: 220%;
  background: radial-gradient(circle at 50% 0%, rgba(167, 139, 250, 0.14), transparent 55%);
  pointer-events: none;
}
.v-icon { font-size: 52px; margin-bottom: 24px; }
.vision h3 { font-size: 24px; font-weight: 500; letter-spacing: 0.06em; margin-bottom: 20px; }
.vision p { font-size: 15px; color: var(--muted); line-height: 2; max-width: 640px; margin: 0 auto 28px; }
.v-tags { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.v-tags span {
  padding: 8px 20px; border-radius: 30px; font-size: 13px; letter-spacing: 0.06em;
  background: rgba(125, 211, 252, 0.08); border: 1px solid rgba(125, 211, 252, 0.2); color: var(--accent);
}

/* ===== 功能模块 ===== */
.modules { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; max-width: 1080px; margin: 0 auto; }
.module {
  display: flex; align-items: center; gap: 20px; padding: 28px 26px;
  border-radius: 18px; background: var(--card); border: 1px solid var(--card-border);
  transition: all 0.35s var(--ease);
}
.module:hover { transform: translateY(-5px); border-color: rgba(94, 234, 212, 0.3); box-shadow: 0 14px 36px rgba(0, 0, 0, 0.25); }
.m-icon { font-size: 30px; }
.m-name { font-size: 16px; font-weight: 500; margin-bottom: 6px; }
.m-desc { font-size: 13px; color: var(--muted); }
.m-status { margin-left: auto; font-size: 12px; padding: 4px 12px; border-radius: 20px; white-space: nowrap; }
.status-on { background: rgba(94, 234, 212, 0.12); color: var(--green); border: 1px solid rgba(94, 234, 212, 0.25); }
.status-wip { background: rgba(249, 168, 212, 0.1); color: var(--pink); border: 1px solid rgba(249, 168, 212, 0.25); }
.status-plan { background: rgba(148, 163, 184, 0.1); color: var(--muted); border: 1px solid rgba(148, 163, 184, 0.2); }

/* ===== 合作流程 ===== */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; max-width: 1160px; margin: 0 auto; position: relative; }
.steps::before {
  content: ""; position: absolute; top: 52px; left: 10%; right: 10%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(125, 211, 252, 0.3), transparent);
}
.step { text-align: center; padding: 40px 20px; position: relative; border-radius: 18px; background: var(--card); border: 1px solid var(--card-border); transition: all 0.4s var(--ease); }
.step:hover { transform: translateY(-6px); box-shadow: 0 16px 44px rgba(0, 0, 0, 0.3); }
.s-num {
  width: 56px; height: 56px; margin: 0 auto 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; letter-spacing: 0.05em; color: var(--text);
  background: linear-gradient(135deg, rgba(125, 211, 252, 0.2), rgba(167, 139, 250, 0.2));
  border: 1px solid rgba(125, 211, 252, 0.3);
}
.step h3 { font-size: 17px; font-weight: 500; margin-bottom: 12px; letter-spacing: 0.04em; }
.step p { font-size: 13px; color: var(--muted); line-height: 1.8; }

/* ===== 技术架构 ===== */
.tech { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; max-width: 1000px; margin: 0 auto; }
.tech span {
  padding: 16px 30px; border-radius: 14px; font-size: 15px; letter-spacing: 0.06em;
  color: var(--text); background: var(--card); border: 1px solid var(--card-border);
  transition: all 0.3s var(--ease); cursor: default;
}
.tech span:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-3px); box-shadow: 0 8px 24px rgba(125, 211, 252, 0.12); }

/* ===== 联系 ===== */
.contact {
  max-width: 720px; margin: 0 auto; text-align: center; padding: 64px 48px;
  border-radius: 24px; background:
    radial-gradient(circle at 50% 0%, rgba(125, 211, 252, 0.14), transparent 60%),
    var(--card);
  border: 1px solid var(--card-border);
}
.c-icon { font-size: 52px; margin-bottom: 22px; }
.contact h3 { font-size: 28px; font-weight: 400; letter-spacing: 0.08em; margin-bottom: 20px; }
.contact p { color: var(--muted); font-size: 15px; line-height: 2; margin-bottom: 32px; }
.mail {
  display: inline-flex; align-items: center; gap: 12px; padding: 16px 36px;
  border-radius: 50px; text-decoration: none; color: var(--accent);
  font-size: 16px; letter-spacing: 0.04em;
  background: rgba(125, 211, 252, 0.08); border: 1px solid rgba(125, 211, 252, 0.25);
  transition: all 0.35s var(--ease);
}
.mail:hover { background: rgba(125, 211, 252, 0.16); transform: translateY(-3px); box-shadow: 0 10px 30px rgba(125, 211, 252, 0.2); }
.c-note { margin-top: 26px; font-size: 13px; color: var(--muted); letter-spacing: 0.1em; }

/* ===== 页脚 ===== */
footer {
  text-align: center; padding: 56px 24px 44px; border-top: 1px solid var(--line);
  color: var(--muted); font-size: 14px; letter-spacing: 0.05em;
}
footer .foot-links { display: flex; justify-content: center; gap: 28px; flex-wrap: wrap; margin-top: 24px; }
footer .foot-links a { color: var(--muted); text-decoration: none; font-size: 13px; transition: color 0.3s; }
footer .foot-links a:hover { color: var(--accent); }

/* ===== 滚动渐显 ===== */
.reveal { opacity: 0; transform: translateY(30px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .features, .modules { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .mall-features { grid-template-columns: repeat(2, 1fr); }
  .story { grid-template-columns: 1fr; gap: 40px; }
  section { padding: 90px 32px; }
}
@media (max-width: 720px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  nav { padding: 0 24px; }
  .features, .modules, .stats, .steps, .mall-features { grid-template-columns: 1fr; }
  section { padding: 70px 20px; }
  .mall-banner { flex-direction: column; text-align: center; padding: 36px 24px; }
  .mall-banner-emoji { font-size: 60px; }
  .hero-cta { flex-direction: column; align-items: center; }
  .btn { width: 100%; max-width: 320px; justify-content: center; }
  .word-card { flex-direction: column; text-align: center; gap: 8px; }
  .word-card .cn { text-align: center; }
}

/* ============================================
   细节精修 · 高端大企业质感 (v2)
   ============================================ */

/* 全局字体微调：更精致的字重与间距 */
body { text-rendering: optimizeLegibility; }
h1, h2, h3, .section-title, .brand, .nav-logo { font-weight: 300; }
h1 strong { font-weight: 500; }

/* 彩色渐变强调（品牌统一色） */
.gradient-text {
  background: linear-gradient(120deg, #e8f6ff 0%, #7dd3fc 40%, #a78bfa 100%);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* 卡片精致化：细腻内高光 + 柔和阴影 */
.feature, .stat, .mall-feat, .module, .step, .tech span, .word-card {
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.06), 0 4px 24px rgba(0,0,0,0.18);
  backdrop-filter: blur(8px);
}
.feature::before, .stat::before, .mall-feat::before, .module::before, .step::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  padding: 1px; -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  background: linear-gradient(135deg, rgba(255,255,255,0.14), transparent 40%, rgba(125,211,252,0.10));
  pointer-events: none; opacity: 0.6; transition: opacity 0.4s;
}
.feature:hover::before, .stat:hover::before, .mall-feat:hover::before, .module:hover::before, .step:hover::before {
  opacity: 1;
}

/* 精致细颗粒底纹（大厂质感） */
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: radial-gradient(rgba(255,255,255,0.028) 1px, transparent 1px);
  background-size: 22px 22px;
  z-index: 1;
}
.hero-inner { z-index: 3; }

/* 导航更精致：顶部细高光 */
nav { box-shadow: inset 0 -1px 0 rgba(148,163,184,0.06); }
nav.scrolled { box-shadow: inset 0 -1px 0 var(--line), 0 8px 32px rgba(0,0,0,0.35); }

/* 分区标题放大留白、更克制 */
section { padding: 130px 48px; }
.section-title { letter-spacing: 0.16em; font-weight: 300; color: #f8fafc; }
.section-title::after {
  background: linear-gradient(90deg, transparent, rgba(125,211,252,0.6), rgba(167,139,250,0.6), transparent);
  width: 96px; height: 1px;
}
.section-label { letter-spacing: 0.55em; color: rgba(125,211,252,0.7); font-size: 11px; }

/* 数据统计：数字更大更聚焦*/
.stat .num { font-size: clamp(42px, 4.5vw, 60px); font-weight: 200; }
.stat { padding: 52px 24px; }

/* 按钮精致化 */
.btn { letter-spacing: 0.14em; font-weight: 400; }
.btn-primary {
  background: linear-gradient(120deg, #7dd3fc 0%, #818cf8 100%);
  box-shadow: 0 10px 30px rgba(125,211,252,0.28), inset 0 1px 0 rgba(255,255,255,0.4);
}
.btn-primary:hover { box-shadow: 0 16px 44px rgba(125,211,252,0.42), inset 0 1px 0 rgba(255,255,255,0.4); }
.btn-ghost { background: rgba(255,255,255,0.025); }

/* 页脚细线 + 更精致 */
footer { border-top: 1px solid rgba(148,163,184,0.08); padding: 64px 24px 48px; }
footer::before {
  content: ""; display: block; width: min(120px, 30%); height: 1px;
  margin: -65px auto 0; background: linear-gradient(90deg, transparent, rgba(125,211,252,0.4), transparent);
}

/* ============================================
   沉浸式特效层 (v3)
   ============================================ */

/* 极光流动背景（全屏慢速流动） */
.aurora {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(40% 60% at 20% 20%, rgba(56,130,246,0.10), transparent 70%),
    radial-gradient(45% 55% at 80% 30%, rgba(139,92,246,0.10), transparent 70%),
    radial-gradient(35% 50% at 60% 80%, rgba(20,184,166,0.07), transparent 70%);
  filter: blur(20px);
  animation: aurora-drift 22s ease-in-out infinite alternate;
}
@keyframes aurora-drift {
  0% { transform: translate(0,0) scale(1); }
  50% { transform: translate(-3%, 2%) scale(1.05); }
  100% { transform: translate(3%, -2%) scale(1.08); }
}

/* 粒子星空（动态 Canvas 用） */
#particles {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
}
.hero-inner { z-index: 3; }

/* 鼠标跟随光晕 */
.mouse-glow {
  position: fixed; width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(125,211,252,0.10), transparent 70%);
  pointer-events: none; z-index: 9999; transform: translate(-50%,-50%);
  opacity: 0; transition: opacity 0.6s;
  will-change: left, top;
}
.mouse-glow.active { opacity: 1; }

/* 卡片 3D 倾斜 */
.tilt { transform-style: preserve-3d; transition: transform 0.25s var(--ease), box-shadow 0.4s; will-change: transform; }
.tilt:hover { transform: perspective(900px) rotateX(var(--rx,0deg)) rotateY(var(--ry,0deg)) translateY(-6px); }

/* 更丰富的入场动画 */
.reveal-left { opacity: 0; transform: translateX(-40px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-right { opacity: 0; transform: translateX(40px); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-up { opacity: 0; transform: translateY(40px) scale(0.98); transition: opacity 0.8s var(--ease), transform 0.8s var(--ease); }
.reveal-left.visible, .reveal-right.visible, .reveal-up.visible { opacity: 1; transform: none; }

/* 平台概览：双栏图文 */
.overview { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; max-width: 1160px; margin: 0 auto; }
.overview-vis {
  position: relative; min-height: 380px;
  background:
    radial-gradient(circle at 50% 50%, rgba(125,211,252,0.16), transparent 60%),
    linear-gradient(160deg, rgba(125,211,252,0.07), rgba(167,139,250,0.07));
  border: 1px solid var(--card-border); border-radius: 24px; overflow: hidden;
}
.overview-vis::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 24px 24px;
}
.overview-vis .ov-node {
  position: absolute; padding: 16px 22px; border-radius: 14px;
  background: rgba(7,11,22,0.75); border: 1px solid rgba(125,211,252,0.25);
  font-size: 14px; letter-spacing: 0.1em; color: var(--text);
  box-shadow: 0 10px 30px rgba(0,0,0,0.3), 0 0 20px rgba(125,211,252,0.08);
}
.overview-vis .ov-core {
  top: 50%; left: 50%; transform: translate(-50%,-50%);
  padding: 22px 34px; font-size: 18px; font-weight: 500;
  background: linear-gradient(135deg, rgba(125,211,252,0.2), rgba(167,139,250,0.2));
  border-color: rgba(125,211,252,0.4);
}
.overview-vis .n1 { top: 12%; left: 8%; }
.overview-vis .n2 { top: 18%; right: 8%; }
.overview-vis .n3 { bottom: 18%; left: 12%; }
.overview-vis .n4 { bottom: 12%; right: 10%; }
.overview-text h3 { font-size: 32px; font-weight: 300; letter-spacing: 0.05em; margin-bottom: 24px; line-height: 1.4; }
.overview-text h3 em { font-style: normal; color: var(--accent); }
.overview-text p { font-size: 15px; color: var(--muted); line-height: 2.1; margin-bottom: 18px; }
.overview-text .ov-points { list-style: none; margin-top: 8px; }
.overview-text .ov-points li {
  padding: 12px 0 12px 34px; position: relative; font-size: 15px; color: #dbe4f0;
  border-bottom: 1px solid rgba(148,163,184,0.08); line-height: 1.8;
}
.overview-text .ov-points li::before {
  content: ""; position: absolute; left: 0; top: 20px;
  width: 16px; height: 16px; border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(125,211,252,0.9), rgba(167,139,250,0.5));
  box-shadow: 0 0 12px rgba(125,211,252,0.4);
}

/* 技术分层架构 */
.arch { display: grid; grid-template-columns: repeat(3,1fr); gap: 28px; max-width: 1160px; margin: 0 auto; }
.arch-layer { padding: 36px 30px; border-radius: 20px; background: var(--card); border: 1px solid var(--card-border); position: relative; transition: all 0.4s var(--ease); }
.arch-layer:hover { transform: translateY(-6px); border-color: rgba(167,139,250,0.35); }
.arch-layer .layer-tag {
  position: absolute; top: 26px; right: 26px; font-size: 11px; letter-spacing: 0.2em;
  color: rgba(125,211,252,0.6); text-transform: uppercase;
}
.arch-layer h3 { font-size: 20px; font-weight: 400; margin-bottom: 22px; letter-spacing: 0.05em; }
.arch-layer h3 .li { color: var(--accent); margin-right: 12px; font-size: 16px; }
.arch-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.arch-tags span {
  padding: 8px 16px; font-size: 13px; border-radius: 8px; letter-spacing: 0.04em;
  background: rgba(255,255,255,0.04); border: 1px solid rgba(148,163,184,0.15); color: var(--muted);
  transition: all 0.3s;
}
.arch-tags span:hover { color: var(--accent); border-color: rgba(125,211,252,0.35); }

/* 信任背书/合作区 */
.partners { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; max-width: 1080px; margin: 0 auto; }
.partner-card {
  padding: 34px 44px; border-radius: 16px; text-align: center;
  background: var(--card); border: 1px solid var(--card-border); opacity: 0.85;
  font-size: 16px; letter-spacing: 0.1em; color: var(--muted); transition: all 0.35s;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.partner-card:hover { opacity: 1; color: var(--text); border-color: rgba(125,211,252,0.3); transform: translateY(-3px); }
.partner-card .p-icon { font-size: 32px; }
.partner-card .p-role { font-size: 11px; letter-spacing: 0.15em; color: rgba(125,211,252,0.6); }

/* 响应式补充 */
@media (max-width: 1024px) {
  .overview { grid-template-columns: 1fr; gap: 40px; }
  .arch { grid-template-columns: 1fr; }
  .overview-vis { min-height: 320px; }
}

/* ============================================
   修复与层级统一 (v4)
   ============================================ */

/* 修复 .mail-icon 图标间距 */
.mail-icon { margin-right: 4px; filter: grayscale(0.2); }

/* 统一 .hero-inner 层级，避免重复定义冲突 */
.hero .hero-inner { z-index: 3; }

/* 内容区块建立独立层级，确保不被全局 .aurora(z-index:0) 干扰 */
section, footer, .drawer, .drawer-backdrop, nav { position: relative; z-index: 2; }

/* .aurora 置底：内容必须盖住极光 */
.aurora { z-index: 0; }

/* Hero 内部：glow/stars/canvas 在内容之下 */
.hero .glow, .hero .stars, .hero #particles { z-index: 1; }
.hero .scroll-hint { z-index: 3; }

/* 修复 .hero 自身为 stacking context，隔离粒子 canvas 与全局极光 */
.hero { position: relative; z-index: 2; overflow: hidden; }

/* 移动端性能：禁掉 CPU 密集特效，保证流畅且不遮挡 */
@media (hover: none), (max-width: 720px) {
  .mouse-glow { display: none; }
  #particles { opacity: 0.35; } /* 弱化粒子，避免遮挡文字 */
  .aurora { filter: blur(14px); }
  .tilt { transform: none !important; }
}