/* ==========================================================
   银杏企业培训官网 · 样式
   主色：青(#22d3ee) → 蓝(#3b82f6) → 紫(#8b5cf6)，证书强调色：琥珀(#f59e0b)
   ========================================================== */
:root {
  --bg: #070b1a;
  --bg-2: #0b1126;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-2: rgba(255, 255, 255, 0.07);
  --border: rgba(148, 163, 255, 0.14);
  --border-strong: rgba(148, 163, 255, 0.28);
  --text: #e6eaf7;
  --text-2: #a3acc8;
  --text-3: #6f7894;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --violet: #8b5cf6;
  --amber: #f59e0b;
  --green: #10b981;
  --pink: #ec4899;
  --grad: linear-gradient(100deg, #22d3ee 0%, #60a5fa 45%, #a78bfa 100%);
  --radius: 18px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --nav-h: 68px;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 8px); -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  transition: background-color 0.45s var(--ease), color 0.45s var(--ease);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
strong { color: #fff; font-weight: 600; }
.nowrap { white-space: nowrap; }
::selection { background: rgba(34, 211, 238, 0.35); color: #fff; }

.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }
.ico {
  width: 1.15em; height: 1.15em; flex: none;
  fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
}

.container { width: min(1200px, 100% - 48px); margin-inline: auto; }
.container.narrow { width: min(860px, 100% - 48px); }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
  background-size: 200% auto;
  animation: gradShift 8s linear infinite;
}
@keyframes gradShift { to { background-position: 200% center; } }

/* ---------- 按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 22px;
  border-radius: 999px; border: 1px solid transparent;
  font: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s, border-color 0.3s;
  white-space: nowrap;
}
.btn-sm { height: 36px; padding: 0 16px; font-size: 14px; }
.btn-lg { height: 52px; padding: 0 28px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-primary {
  color: #fff;
  background: linear-gradient(100deg, #0ea5e9, #6366f1 60%, #8b5cf6);
  box-shadow: 0 8px 28px -8px rgba(99, 102, 241, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.25);
  overflow: hidden;
}
.btn-primary::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(110deg, transparent 30%, rgba(255, 255, 255, 0.45) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform 0.8s var(--ease);
}
.btn-primary:hover::after { transform: translateX(120%); }
.btn-primary:hover { box-shadow: 0 14px 40px -8px rgba(99, 102, 241, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.25); }
.btn-ghost { color: var(--text); background: var(--surface); border-color: var(--border-strong); backdrop-filter: blur(8px); }
.btn-ghost:hover { background: var(--surface-2); border-color: rgba(34, 211, 238, 0.5); }
.btn .ico { transition: transform 0.3s var(--ease); }
.btn:hover .ico { transform: translateX(3px); }

/* ---------- 滚动进度条 ---------- */
.scroll-progress { position: fixed; inset: 0 0 auto; height: 2px; z-index: 100; pointer-events: none; }
.scroll-progress span { display: block; height: 100%; width: 100%; background: var(--grad); transform-origin: left; transform: scaleX(0); box-shadow: 0 0 10px var(--cyan); }

/* ---------- 导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 90; height: var(--nav-h);
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled { background: rgba(7, 11, 26, 0.72); backdrop-filter: blur(16px) saturate(140%); border-color: var(--border); }
.nav-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-logo { width: 36px; height: 36px; border-radius: 8px; object-fit: cover; display: block; flex: none; }
.brand-text { display: flex; flex-direction: column; font-weight: 700; font-size: 17px; line-height: 1.15; letter-spacing: 0.5px; }
.brand-text small { font-size: 10px; font-weight: 500; color: var(--text-3); letter-spacing: 1.5px; text-transform: uppercase; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-links a:not(.btn) { position: relative; padding: 8px 14px; font-size: 14.5px; color: var(--text-2); border-radius: 8px; transition: color 0.25s; }
.nav-links a:not(.btn)::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px; height: 2px; border-radius: 2px;
  background: var(--grad); transform: scaleX(0); transition: transform 0.35s var(--ease);
}
.nav-links a:not(.btn):hover,
.nav-links a.active { color: #fff; }
.nav-links a:not(.btn):hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-cta { margin-left: 10px; }
.nav-tools { display: flex; align-items: center; gap: 8px; margin-left: 8px; }
.nav-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid var(--border); background: var(--surface); color: var(--text); cursor: pointer; place-items: center; }
.nav-toggle .ico { width: 22px; height: 22px; }
.theme-toggle {
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 12px; border: 1px solid var(--border); background: var(--surface); color: var(--text);
  cursor: pointer; transition: border-color 0.3s, background 0.3s, color 0.3s;
}
.theme-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.theme-toggle .ico { width: 18px; height: 18px; }
.theme-toggle .moon { display: none; }
html[data-theme="light"] .theme-toggle .sun { display: none; }
html[data-theme="light"] .theme-toggle .moon { display: block; }

/* 产品示意（手机、管理端窗口）固定为深色界面，不随页面风格翻转 */
.phone, .desk, .mini-phone {
  --text: #e6eaf7;
  --text-2: #a3acc8;
  --text-3: #6f7894;
  --border: rgba(148, 163, 255, 0.18);
  --border-strong: rgba(148, 163, 255, 0.32);
  --bg: #070b1a;
  --cyan: #22d3ee;
  --amber: #f59e0b;
  color: #e6eaf7;
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 100vh; min-height: 100svh;
  display: flex; align-items: center;
  padding: calc(var(--nav-h) + 40px) 0 90px;
  overflow: hidden; isolation: isolate;
}
.hero-bg { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.aurora { position: absolute; inset: 0; z-index: -2; filter: blur(70px); opacity: 0.8; }
.aurora i { position: absolute; border-radius: 50%; mix-blend-mode: screen; }
.aurora i:nth-child(1) { width: 48vw; height: 48vw; left: -12vw; top: -18vw; background: radial-gradient(circle, rgba(34, 211, 238, 0.35), transparent 65%); animation: float1 18s ease-in-out infinite alternate; }
.aurora i:nth-child(2) { width: 52vw; height: 52vw; right: -16vw; top: 0; background: radial-gradient(circle, rgba(139, 92, 246, 0.38), transparent 65%); animation: float2 22s ease-in-out infinite alternate; }
.aurora i:nth-child(3) { width: 40vw; height: 40vw; left: 30vw; bottom: -24vw; background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 65%); animation: float1 26s ease-in-out infinite alternate-reverse; }
@keyframes float1 { to { transform: translate(8vw, 6vw) scale(1.1); } }
@keyframes float2 { to { transform: translate(-6vw, 8vw) scale(0.92); } }
.grid-floor {
  position: absolute; left: -10%; right: -10%; bottom: -10%; height: 55%; z-index: -1;
  background-image: linear-gradient(rgba(99, 140, 255, 0.13) 1px, transparent 1px), linear-gradient(90deg, rgba(99, 140, 255, 0.13) 1px, transparent 1px);
  background-size: 56px 56px;
  transform: perspective(600px) rotateX(62deg);
  transform-origin: bottom;
  mask-image: linear-gradient(to top, #000 0%, transparent 85%);
  -webkit-mask-image: linear-gradient(to top, #000 0%, transparent 85%);
  animation: gridMove 6s linear infinite;
}
@keyframes gridMove { to { background-position: 0 56px; } }

.hero-inner { display: grid; grid-template-columns: 1.05fr 1fr; align-items: center; gap: 40px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px 6px 10px; border-radius: 999px;
  font-size: 13.5px; color: #bdf4ff;
  background: rgba(34, 211, 238, 0.08); border: 1px solid rgba(34, 211, 238, 0.28);
}
.eyebrow .ico { color: var(--cyan); }
.hero-title {
  margin: 22px 0 20px;
  font-size: clamp(32px, 4.6vw, 60px);
  line-height: 1.16; font-weight: 800; letter-spacing: 1px;
}
@media (min-width: 600px) { .hero-title .grad-text { white-space: nowrap; } }
.hero-sub { max-width: 560px; font-size: clamp(15px, 1.4vw, 18px); color: var(--text-2); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 10px 22px; margin-top: 30px; font-size: 14px; color: var(--text-2); }
.hero-points li { display: flex; align-items: center; gap: 7px; }
.hero-points .ico { color: var(--cyan); width: 17px; height: 17px; }

.hero-visual { position: relative; aspect-ratio: 1; width: 100%; max-width: 560px; justify-self: center; }
.hero-visual canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.orbit { position: absolute; inset: 6%; pointer-events: none; }
.orbit span { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(120, 160, 255, 0.12); }
.orbit span:nth-child(2) { inset: 10%; border-style: dashed; border-color: rgba(34, 211, 238, 0.14); animation: spin 40s linear infinite; }
.orbit span:nth-child(3) { inset: -4%; border-color: transparent; border-top-color: rgba(139, 92, 246, 0.5); border-right-color: rgba(34, 211, 238, 0.3); animation: spin 14s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.morph-label {
  position: absolute; left: 50%; bottom: -2%; transform: translateX(-50%);
  display: flex; align-items: center; gap: 10px; white-space: nowrap;
  padding: 6px 16px 6px 6px; border-radius: 999px;
  background: rgba(10, 16, 36, 0.7); border: 1px solid var(--border-strong); backdrop-filter: blur(10px);
  font-size: 14px; color: var(--text-2);
}
.morph-label b {
  display: grid; place-items: center; width: 32px; height: 32px; border-radius: 50%;
  background: var(--grad); color: #0a0f24; font-size: 16px;
}
.morph-label.swap b, .morph-label.swap span { animation: labelSwap 0.6s var(--ease); }
@keyframes labelSwap { from { opacity: 0; transform: translateY(8px); filter: blur(4px); } }

.float-chip {
  position: absolute; display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; border-radius: 14px;
  background: rgba(12, 18, 40, 0.72); border: 1px solid var(--border-strong);
  backdrop-filter: blur(12px); box-shadow: 0 20px 40px -20px rgba(0, 0, 0, 0.8);
  font-size: 13px; line-height: 1.3;
  animation: bob 6s ease-in-out infinite;
}
.float-chip .ico { width: 30px; height: 30px; padding: 6px; border-radius: 9px; }
.float-chip span { display: flex; flex-direction: column; }
.float-chip em { font-style: normal; font-size: 12px; color: var(--text-3); }
.chip-a { top: 8%; left: -4%; }
.chip-a .ico { color: var(--cyan); background: rgba(34, 211, 238, 0.12); }
.chip-b { top: 44%; right: -6%; animation-delay: -2s; }
.chip-b .ico { color: var(--violet); background: rgba(139, 92, 246, 0.14); }
.chip-c { bottom: 12%; left: 0; animation-delay: -4s; }
.chip-c .ico { color: var(--amber); background: rgba(245, 158, 11, 0.14); }
@keyframes bob { 50% { transform: translateY(-12px); } }

.scroll-hint { position: absolute; left: 50%; bottom: 26px; transform: translateX(-50%); width: 26px; height: 42px; border-radius: 14px; border: 1.5px solid var(--border-strong); }
.scroll-hint span { position: absolute; left: 50%; top: 8px; width: 4px; height: 8px; margin-left: -2px; border-radius: 2px; background: var(--cyan); animation: wheel 1.8s var(--ease) infinite; }
@keyframes wheel { 0% { opacity: 0; transform: translateY(-4px); } 30% { opacity: 1; } 100% { opacity: 0; transform: translateY(14px); } }

/* ---------- 指标带 ---------- */
.stats { position: relative; padding: 10px 0 30px; }
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border); border-radius: 22px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
  backdrop-filter: blur(10px);
}
.stat { display: flex; align-items: center; gap: 16px; padding: 26px 28px; }
.stat + .stat { border-left: 1px solid var(--border); }
.stat b { display: flex; align-items: baseline; font-size: 44px; font-weight: 800; line-height: 1; }
.stat b .count { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat b i { font-style: normal; font-size: 16px; color: var(--text-2); margin-left: 4px; }
.stat p { font-size: 15px; font-weight: 600; line-height: 1.45; }
.stat small { font-weight: 400; font-size: 12.5px; color: var(--text-3); }

/* ---------- 通用区块 ---------- */
.section { position: relative; padding: 110px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 60px; }
.section-head.left { text-align: left; margin: 0 0 36px; }
.kicker {
  display: inline-block; margin-bottom: 14px;
  font-size: 13px; font-weight: 700; letter-spacing: 4px; color: var(--cyan);
}
.kicker::before { content: ""; display: inline-block; width: 18px; height: 2px; margin-right: 10px; vertical-align: middle; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.section-head h2 { font-size: clamp(28px, 3.6vw, 44px); line-height: 1.25; font-weight: 800; letter-spacing: 0.5px; }
.section-head h2 .grad-text { white-space: nowrap; }
.section-head p:not(.kicker) { margin-top: 16px; color: var(--text-2); font-size: 16.5px; }

/* 区块之间的光束分隔线 */
.divider { position: relative; height: 1px; width: min(1200px, 100% - 48px); margin: 0 auto; background: linear-gradient(90deg, transparent, var(--border-strong), transparent); overflow: hidden; }
.divider span { position: absolute; top: -1px; left: 0; width: 220px; height: 3px; background: linear-gradient(90deg, transparent, var(--cyan), #fff, var(--violet), transparent); filter: blur(0.5px); box-shadow: 0 0 18px var(--cyan); transform: translateX(-240px); }
.divider.in span { animation: beam 2.4s var(--ease) forwards; }
@keyframes beam { to { transform: translateX(calc(min(1200px, 100vw - 48px) + 20px)); } }

/* ---------- 进入动画 ---------- */
.js .reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.js .reveal.in { opacity: 1; transform: none; }
.js .reveal[data-delay="1"] { transition-delay: 0.1s; }
.js .reveal[data-delay="2"] { transition-delay: 0.2s; }
.js .reveal[data-delay="3"] { transition-delay: 0.3s; }
.js .reveal[data-delay="4"] { transition-delay: 0.4s; }

/* ---------- 学习闭环 ---------- */
.loop-track { position: relative; }
.loop-line { position: absolute; left: 10%; right: 10%; top: 38px; height: 2px; background: rgba(148, 163, 255, 0.14); border-radius: 2px; }
.loop-fill { position: absolute; inset: 0; background: var(--grad); transform-origin: left; transform: scaleX(0); box-shadow: 0 0 14px rgba(34, 211, 238, 0.7); }
.loop-comet { position: absolute; top: -3px; left: 0; width: 70px; height: 8px; border-radius: 8px; background: radial-gradient(ellipse at right, #fff, rgba(34, 211, 238, 0.8) 30%, transparent 70%); filter: blur(1px); animation: comet 4.5s linear infinite; }
@keyframes comet { from { left: -70px; opacity: 0; } 10% { opacity: 1; } 90% { opacity: 1; } to { left: 100%; opacity: 0; } }
.loop-steps { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.loop-step { text-align: center; padding: 0 6px; }
.loop-node {
  position: relative; width: 78px; height: 78px; margin: 0 auto 20px;
  display: grid; place-items: center; border-radius: 50%;
  background: var(--bg-2); border: 1px solid var(--border-strong);
  color: var(--text-2);
  transition: color 0.6s, border-color 0.6s, box-shadow 0.6s, transform 0.6s var(--ease);
}
.loop-node .ico { width: 30px; height: 30px; }
.loop-node::before { content: ""; position: absolute; inset: -8px; border-radius: 50%; border: 1px dashed rgba(34, 211, 238, 0.35); opacity: 0; transform: scale(0.8); transition: 0.6s var(--ease); animation: spin 12s linear infinite; }
.loop-step.lit .loop-node { color: #fff; border-color: transparent; background: linear-gradient(135deg, rgba(34, 211, 238, 0.35), rgba(139, 92, 246, 0.45)); box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.15) inset, 0 10px 40px -6px rgba(34, 211, 238, 0.6); transform: translateY(-4px); }
.loop-step.lit .loop-node::before { opacity: 1; transform: scale(1); }
.loop-no { display: block; font-size: 12.5px; font-weight: 700; letter-spacing: 2px; color: var(--cyan); }
.loop-step h3 { margin: 6px 0 8px; font-size: 19px; }
.loop-step p { font-size: 14px; color: var(--text-2); }

/* ---------- 产品能力（便当布局） ---------- */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card {
  position: relative; padding: 30px; border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.015));
  border: 1px solid var(--border);
  overflow: hidden; isolation: isolate;
  transition: transform 0.5s var(--ease), border-color 0.4s, box-shadow 0.5s var(--ease);
}
.card-lg { grid-column: span 2; }
.card-full { grid-column: 1 / -1; }
.card:hover { transform: translateY(-6px); border-color: var(--border-strong); box-shadow: 0 30px 60px -30px rgba(34, 211, 238, 0.35); }
/* 鼠标跟随光斑 */
.spotlight::before {
  content: ""; position: absolute; inset: 0; z-index: -1; opacity: 0; transition: opacity 0.4s;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(34, 211, 238, 0.13), transparent 45%);
}
.spotlight::after {
  content: ""; position: absolute; inset: 0; z-index: -1; border-radius: inherit; padding: 1px; opacity: 0; transition: opacity 0.4s;
  background: radial-gradient(260px circle at var(--mx, 50%) var(--my, 50%), rgba(139, 92, 246, 0.9), transparent 60%);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
}
.spotlight:hover::before, .spotlight:hover::after { opacity: 1; }
.card-icon { display: grid; place-items: center; width: 50px; height: 50px; margin-bottom: 20px; border-radius: 14px; color: var(--blue); background: rgba(59, 130, 246, 0.13); border: 1px solid rgba(59, 130, 246, 0.25); }
.card-icon .ico { width: 24px; height: 24px; }
.c-violet { color: var(--violet); background: rgba(139, 92, 246, 0.13); border-color: rgba(139, 92, 246, 0.3); }
.c-amber { color: var(--amber); background: rgba(245, 158, 11, 0.12); border-color: rgba(245, 158, 11, 0.3); }
.c-green { color: var(--green); background: rgba(16, 185, 129, 0.12); border-color: rgba(16, 185, 129, 0.3); }
.c-pink { color: var(--pink); background: rgba(236, 72, 153, 0.12); border-color: rgba(236, 72, 153, 0.3); }
.c-cyan { color: var(--cyan); background: rgba(34, 211, 238, 0.12); border-color: rgba(34, 211, 238, 0.3); }
.c-blue { color: var(--blue); }
.card h3 { font-size: 20px; margin-bottom: 10px; }
.card p { color: var(--text-2); font-size: 14.5px; }
.media-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.media-tags span { display: inline-flex; align-items: center; gap: 6px; padding: 5px 12px; border-radius: 999px; font-size: 13px; color: var(--text-2); background: var(--surface); border: 1px solid var(--border); }
.media-tags .ico { color: var(--cyan); width: 15px; height: 15px; }
.mini-player { margin-top: 22px; }
.mp-bar { position: relative; height: 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.08); }
.mp-fill { position: absolute; inset: 0 32% 0 0; border-radius: inherit; background: var(--grad); transform-origin: left; transform: scaleX(0); transition: transform 2s var(--ease) 0.3s; }
.in .mp-fill { transform: scaleX(1); }
.mp-bar i { position: absolute; top: 50%; width: 12px; height: 12px; margin: -6px 0 0 -6px; border-radius: 50%; background: var(--bg); border: 2px solid var(--amber); box-shadow: 0 0 10px rgba(245, 158, 11, 0.7); }
.mini-player small { display: block; margin-top: 10px; font-size: 12.5px; color: var(--text-3); }
.mini-chart { margin-top: 18px; height: 90px; }
.mini-chart svg { width: 100%; height: 100%; }
.mc-line { stroke-dasharray: 420; stroke-dashoffset: 420; filter: drop-shadow(0 0 6px rgba(34, 211, 238, 0.8)); transition: stroke-dashoffset 2.2s var(--ease) 0.3s; }
.mc-area { opacity: 0; transition: opacity 1.2s ease 1.2s; }
.in .mc-line { stroke-dashoffset: 0; }
.in .mc-area { opacity: 1; }

/* ---------- 产品演示 ---------- */
.showcase-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.sc-step { min-height: 64vh; display: flex; flex-direction: column; justify-content: center; opacity: 0.28; transition: opacity 0.6s var(--ease); padding-left: 26px; border-left: 2px solid var(--border); position: relative; }
.sc-step::before { content: ""; position: absolute; left: -2px; top: 50%; width: 2px; height: 0; background: var(--grad); transform: translateY(-50%); transition: height 0.7s var(--ease); box-shadow: 0 0 12px var(--cyan); }
.sc-step.is-active { opacity: 1; }
.sc-step.is-active::before { height: 60%; }
.sc-no { font-size: 13px; font-weight: 700; letter-spacing: 3px; color: var(--cyan); }
.sc-step h3 { margin: 10px 0 14px; font-size: clamp(22px, 2.4vw, 30px); line-height: 1.3; }
.sc-step p { color: var(--text-2); font-size: 16px; max-width: 460px; }

.showcase-device { position: sticky; top: calc(var(--nav-h) + 6vh); height: min(640px, 80vh); display: grid; place-items: center; }
.device-glow { position: absolute; width: 80%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(99, 102, 241, 0.45), rgba(34, 211, 238, 0.15) 45%, transparent 70%); filter: blur(30px); animation: pulse 6s ease-in-out infinite; }
@keyframes pulse { 50% { transform: scale(1.12); opacity: 0.75; } }
.phone {
  position: relative; width: min(300px, 78vw); aspect-ratio: 9 / 18.5; border-radius: 44px; padding: 12px;
  background: linear-gradient(145deg, #1b2346, #0b1024);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 50px 100px -30px rgba(0, 0, 0, 0.9), inset 0 0 0 2px rgba(255, 255, 255, 0.04), 0 0 0 8px rgba(255, 255, 255, 0.02);
}
.phone-notch { position: absolute; top: 20px; left: 50%; width: 90px; height: 24px; margin-left: -45px; border-radius: 20px; background: #05070f; z-index: 3; }
.screens { position: relative; height: 100%; border-radius: 34px; overflow: hidden; background: linear-gradient(180deg, #0f1733, #0a0f22); }
.screen { position: absolute; inset: 0; padding: 54px 16px 30px; opacity: 0; transform: translateY(30px) scale(0.96); filter: blur(6px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease), filter 0.7s var(--ease); }
.screen.is-active { opacity: 1; transform: none; filter: none; }
.screen-dots { position: absolute; bottom: 22px; left: 0; right: 0; display: flex; justify-content: center; gap: 6px; z-index: 3; }
.screen-dots i { width: 6px; height: 6px; border-radius: 6px; background: rgba(255, 255, 255, 0.2); transition: width 0.4s var(--ease), background 0.4s; }
.screen-dots i.on { width: 20px; background: var(--cyan); }
.scr-head { display: flex; flex-direction: column; margin-bottom: 14px; }
.scr-head span { font-weight: 700; font-size: 16px; }
.scr-head small { font-size: 12px; color: var(--text-3); }

.video { position: relative; height: 150px; border-radius: 16px; overflow: hidden; background: linear-gradient(135deg, #1e3a8a, #6d28d9); }
.video-art { position: absolute; inset: 0; display: grid; place-items: center; color: rgba(255, 255, 255, 0.35); }
.video-art .ico { width: 64px; height: 64px; stroke-width: 1.4; }
.video-bar { position: absolute; left: 12px; right: 12px; bottom: 10px; height: 4px; border-radius: 4px; background: rgba(255, 255, 255, 0.2); }
.video-bar span { display: block; height: 100%; width: 58%; border-radius: inherit; background: #fff; }
.is-active .video-bar span { animation: playBar 6s linear infinite; }
@keyframes playBar { from { width: 20%; } to { width: 80%; } }
.checkpoint { position: absolute; left: 50%; top: 50%; width: 76%; padding: 12px; transform: translate(-50%, -50%) scale(0.6); opacity: 0; display: flex; flex-direction: column; align-items: center; gap: 2px; border-radius: 14px; background: rgba(10, 15, 36, 0.88); border: 1px solid rgba(245, 158, 11, 0.5); backdrop-filter: blur(6px); text-align: center; }
.is-active .checkpoint { animation: cpPop 6s var(--ease) infinite; }
@keyframes cpPop { 0%, 30% { opacity: 0; transform: translate(-50%, -50%) scale(0.6); } 38%, 80% { opacity: 1; transform: translate(-50%, -50%) scale(1); } 90%, 100% { opacity: 0; transform: translate(-50%, -50%) scale(0.9); } }
.checkpoint .ico { color: var(--amber); width: 22px; height: 22px; }
.checkpoint b { font-size: 13px; }
.checkpoint small { font-size: 11px; color: var(--text-2); }
.cp-btn { margin-top: 6px; padding: 3px 14px; border-radius: 999px; font-size: 11px; font-weight: 600; background: var(--amber); color: #1a1200; }
.chapters { margin-top: 16px; display: grid; gap: 8px; }
.chapters li { display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-radius: 12px; font-size: 12.5px; color: var(--text-2); background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border); }
.chapters .ico { width: 15px; height: 15px; color: var(--text-3); }
.chapters .done .ico { color: var(--green); }
.chapters .cur { color: #fff; border-color: rgba(34, 211, 238, 0.45); background: rgba(34, 211, 238, 0.08); }
.chapters .cur .ico { color: var(--cyan); }

.face-box { position: relative; display: grid; place-items: center; margin-top: 26px; }
.face-ring { position: relative; width: 180px; height: 180px; border-radius: 50%; display: grid; place-items: center; overflow: hidden; background: radial-gradient(circle, rgba(139, 92, 246, 0.25), rgba(34, 211, 238, 0.05) 70%); border: 2px solid rgba(139, 92, 246, 0.6); box-shadow: 0 0 40px rgba(139, 92, 246, 0.4), inset 0 0 30px rgba(34, 211, 238, 0.2); }
.face-ring .ico { width: 92px; height: 92px; color: rgba(200, 220, 255, 0.85); stroke-width: 1.3; }
.scan-line { position: absolute; left: 0; right: 0; height: 40px; top: -40px; background: linear-gradient(180deg, transparent, rgba(34, 211, 238, 0.55)); border-bottom: 2px solid var(--cyan); box-shadow: 0 6px 18px rgba(34, 211, 238, 0.7); }
.is-active .scan-line { animation: scan 2.4s ease-in-out infinite; }
@keyframes scan { 0% { top: -40px; } 50% { top: 180px; } 100% { top: -40px; } }
.face-ok { position: absolute; bottom: -14px; display: flex; align-items: center; gap: 6px; padding: 6px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; background: var(--green); color: #032b1e; opacity: 0; transform: translateY(10px) scale(0.8); }
.is-active .face-ok { animation: okIn 4.8s var(--ease) infinite; }
@keyframes okIn { 0%, 45% { opacity: 0; transform: translateY(10px) scale(0.8); } 55%, 92% { opacity: 1; transform: none; } 100% { opacity: 0; } }
.face-ok .ico { width: 16px; height: 16px; }
.face-meta { display: flex; justify-content: center; flex-wrap: wrap; gap: 8px; margin-top: 40px; }
.face-meta span { padding: 5px 10px; border-radius: 999px; font-size: 11.5px; color: var(--text-2); background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border); }

.exam-head { flex-direction: row; align-items: center; justify-content: space-between; }
.timer { font-size: 12px; padding: 3px 10px; border-radius: 999px; color: var(--amber); background: rgba(245, 158, 11, 0.12); border: 1px solid rgba(245, 158, 11, 0.35); }
.exam-q { padding: 16px; border-radius: 16px; background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border); }
.exam-q small { font-size: 11.5px; color: var(--cyan); }
.exam-q p { margin: 6px 0 12px; font-size: 14px; font-weight: 600; line-height: 1.5; }
.exam-q ul { display: grid; gap: 8px; }
.exam-q li { padding: 9px 12px; border-radius: 10px; font-size: 12.5px; color: var(--text-2); border: 1px solid var(--border); transition: 0.4s; }
.is-active .exam-q li.pick { animation: pick 4s var(--ease) infinite; }
@keyframes pick { 0%, 35% { background: transparent; border-color: var(--border); color: var(--text-2); } 45%, 100% { background: rgba(34, 211, 238, 0.14); border-color: var(--cyan); color: #fff; box-shadow: 0 0 18px -4px rgba(34, 211, 238, 0.7); } }
.exam-dots { display: grid; grid-template-columns: repeat(10, 1fr); gap: 6px; margin-top: 16px; }
.exam-dots i { aspect-ratio: 1; border-radius: 6px; background: rgba(255, 255, 255, 0.07); }
.exam-dots i.on { background: rgba(59, 130, 246, 0.5); }
.exam-dots i.cur { background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }

.cert { position: relative; padding: 18px 16px; border-radius: 16px; text-align: center; background: linear-gradient(160deg, #fffaf0, #fdf1d8); color: #4a3510; border: 1px solid #e9c77d; box-shadow: 0 20px 40px -20px rgba(245, 158, 11, 0.6); overflow: hidden; }
.cert::before { content: ""; position: absolute; inset: 6px; border-radius: 12px; border: 1px solid rgba(180, 130, 40, 0.35); pointer-events: none; }
.cert::after { content: ""; position: absolute; inset: 0; background: linear-gradient(115deg, transparent 35%, rgba(255, 255, 255, 0.85) 50%, transparent 65%); transform: translateX(-120%); }
.is-active .cert::after { animation: shine 3.5s ease-in-out infinite 0.6s; }
@keyframes shine { 0% { transform: translateX(-120%); } 40%, 100% { transform: translateX(120%); } }
.cert-title { font-size: 18px; font-weight: 800; letter-spacing: 4px; color: #8a5a00; }
.cert-name { margin: 12px 0 6px; font-size: 20px; font-weight: 700; letter-spacing: 6px; color: #2e2108; }
.cert-course { font-size: 12px; color: #6b5420; }
.cert-foot { display: flex; align-items: center; gap: 10px; margin-top: 16px; text-align: left; }
.cert-qr { display: grid; grid-template-columns: repeat(21, 1fr); width: 64px; height: 64px; padding: 3px; flex: none; background: #fff; border-radius: 4px; }
.cert-qr i { background: #1c1404; }
.cert-qr i.o { background: transparent; }
.cert-info { flex: 1; display: flex; flex-direction: column; font-size: 10px; color: #8a6d2c; line-height: 1.5; }
.cert-info b { font-size: 12px; color: #2e2108; }
.cert-seal { width: 54px; height: 54px; flex: none; display: grid; place-items: center; border-radius: 50%; border: 2px solid rgba(220, 38, 38, 0.75); color: rgba(220, 38, 38, 0.85); font-size: 10px; font-weight: 700; line-height: 1.2; text-align: center; transform: rotate(-14deg) scale(1.6); opacity: 0; }
.is-active .cert-seal { animation: stamp 0.6s cubic-bezier(0.5, 1.8, 0.4, 1) 0.5s forwards; }
@keyframes stamp { to { transform: rotate(-14deg) scale(1); opacity: 1; } }

/* ---------- 安全合规 ---------- */
.security { background: radial-gradient(ellipse 60% 50% at 20% 50%, rgba(99, 102, 241, 0.12), transparent 70%); }
.security-inner { display: grid; grid-template-columns: 1fr 1.1fr; gap: 70px; align-items: center; }
.shield-visual { position: relative; aspect-ratio: 1; max-width: 460px; width: 100%; justify-self: center; }
.radar { position: absolute; inset: 0; border-radius: 50%; overflow: hidden; }
.radar span { position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(34, 211, 238, 0.18); }
.radar span:nth-child(2) { inset: 17%; }
.radar span:nth-child(3) { inset: 34%; }
.radar .sweep { position: absolute; inset: 0; border-radius: 50%; background: conic-gradient(from 0deg, rgba(34, 211, 238, 0.35), transparent 70deg, transparent 360deg); animation: spin 5s linear infinite; }
.radar::after { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 1px solid rgba(34, 211, 238, 0.4); animation: ripple 3.2s ease-out infinite; }
@keyframes ripple { from { transform: scale(0.3); opacity: 1; } to { transform: scale(1); opacity: 0; } }
.shield-core { position: absolute; inset: 33%; display: grid; place-items: center; border-radius: 30%; background: linear-gradient(145deg, rgba(34, 211, 238, 0.25), rgba(139, 92, 246, 0.4)); border: 1px solid rgba(255, 255, 255, 0.18); box-shadow: 0 0 60px rgba(99, 102, 241, 0.6), inset 0 0 30px rgba(255, 255, 255, 0.08); }
.shield-core .ico { width: 56%; height: 56%; color: #fff; stroke-width: 1.6; filter: drop-shadow(0 0 10px rgba(34, 211, 238, 0.9)); }
.sat { position: absolute; display: grid; place-items: center; width: 52px; height: 52px; border-radius: 16px; background: rgba(12, 18, 40, 0.85); border: 1px solid var(--border-strong); backdrop-filter: blur(8px); animation: bob 5s ease-in-out infinite; }
.sat .ico { width: 24px; height: 24px; }
.s1 { top: 4%; left: calc(50% - 26px); color: var(--violet); }
.s2 { top: calc(50% - 26px); right: 0; color: var(--cyan); animation-delay: -1.2s; }
.s3 { bottom: 4%; left: calc(50% - 26px); color: var(--amber); animation-delay: -2.4s; }
.s4 { top: calc(50% - 26px); left: 0; color: var(--green); animation-delay: -3.6s; }
.sec-list { display: grid; gap: 14px; }
.sec-list li { display: flex; gap: 16px; padding: 18px 20px; border-radius: 16px; background: var(--surface); border: 1px solid var(--border); transition: border-color 0.3s, background 0.3s, transform 0.4s var(--ease); }
.sec-list li:hover { border-color: rgba(34, 211, 238, 0.4); background: rgba(34, 211, 238, 0.05); transform: translateX(6px); }
.sec-list li > .ico { width: 42px; height: 42px; padding: 10px; border-radius: 12px; color: var(--cyan); background: rgba(34, 211, 238, 0.1); }
.sec-list h3 { font-size: 17px; margin-bottom: 4px; }
.sec-list p { font-size: 14px; color: var(--text-2); }

/* ---------- 数据本地化 ---------- */
.local { background: radial-gradient(ellipse 50% 60% at 18% 50%, rgba(34, 211, 238, 0.08), transparent 70%); }
.local-inner { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items: center; }
.local-visual { position: relative; aspect-ratio: 1; max-width: 440px; width: 100%; justify-self: center; }
.local-boundary { position: absolute; inset: 6%; border-radius: 50%; }
.local-boundary span { position: absolute; inset: 0; border-radius: 50%; border: 1.5px dashed rgba(34, 211, 238, 0.45); }
.local-boundary span:nth-child(2) { inset: 7%; border-style: solid; border-color: rgba(139, 92, 246, 0.22); }
.local-orbit { position: absolute; inset: 16%; border-radius: 50%; animation: spin 16s linear infinite; }
.local-orbit i { position: absolute; width: 9px; height: 9px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 14px var(--cyan); }
.local-orbit i:nth-child(1) { top: -4px; left: calc(50% - 4px); }
.local-orbit i:nth-child(2) { bottom: 8%; left: 0; background: var(--violet); box-shadow: 0 0 14px var(--violet); }
.local-orbit i:nth-child(3) { bottom: 8%; right: 0; background: var(--blue); box-shadow: 0 0 14px var(--blue); }
.local-core {
  position: absolute; inset: 28%;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; text-align: center;
  border-radius: 28px;
  background: linear-gradient(160deg, rgba(34, 211, 238, 0.18), rgba(99, 102, 241, 0.28));
  border: 1px solid var(--border-strong);
  box-shadow: 0 0 50px rgba(34, 211, 238, 0.2), inset 0 0 24px rgba(255, 255, 255, 0.04);
}
.local-core .ico { width: 36px; height: 36px; color: var(--cyan); }
.local-core b { font-size: 15px; line-height: 1.3; }
.local-core small { font-size: 12px; color: var(--text-3); }
.local-node {
  position: absolute; display: flex; align-items: center; gap: 6px;
  padding: 7px 12px; border-radius: 999px; font-size: 13px; white-space: nowrap;
  background: rgba(12, 18, 40, 0.78); border: 1px solid var(--border-strong); backdrop-filter: blur(8px);
  animation: bob 5.5s ease-in-out infinite;
}
.local-node .ico { width: 15px; height: 15px; color: var(--cyan); }
.n1 { top: 7%; left: 18%; }
.n2 { top: 22%; right: 0; animation-delay: -1.4s; }
.n2 .ico { color: var(--violet); }
.n3 { bottom: 18%; right: 2%; animation-delay: -2.8s; }
.n3 .ico { color: var(--amber); }
.n4 { bottom: 12%; left: 4%; animation-delay: -4s; }
.n4 .ico { color: var(--green); }
.local-cloud {
  position: absolute; top: -2%; right: -2%;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  color: var(--text-3); font-size: 12px; opacity: 0.72;
}
.local-cloud .ico { width: 34px; height: 34px; color: #f87171; }
.local-points { display: grid; gap: 14px; }
.local-points li { display: flex; gap: 16px; padding: 18px 20px; border-radius: 16px; background: var(--surface); border: 1px solid var(--border); }
.local-points li > .ico { width: 42px; height: 42px; padding: 10px; border-radius: 12px; color: var(--cyan); background: rgba(34, 211, 238, 0.1); }
.local-points h3 { font-size: 17px; margin-bottom: 4px; }
.local-points p { font-size: 14px; color: var(--text-2); }

/* ---------- 多端协同 ---------- */
.plat-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; }
.plat-card { padding: 30px; border-radius: 22px; background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01)); border: 1px solid var(--border); display: flex; flex-direction: column; gap: 26px; }
.plat-text h3 { display: flex; align-items: center; gap: 10px; font-size: 20px; margin-bottom: 8px; }
.plat-text h3 .ico { color: var(--cyan); }
.plat-text p { color: var(--text-2); font-size: 14.5px; }
.desk { height: 230px; border-radius: 14px; overflow: hidden; background: #0a1022; border: 1px solid var(--border-strong); box-shadow: 0 30px 60px -30px rgba(59, 130, 246, 0.5); }
.desk-top { display: flex; gap: 6px; padding: 10px 12px; border-bottom: 1px solid var(--border); }
.desk-top i { width: 9px; height: 9px; border-radius: 50%; background: #ef4444; }
.desk-top i:nth-child(2) { background: #f59e0b; }
.desk-top i:nth-child(3) { background: #10b981; }
.desk-body { display: flex; height: calc(100% - 30px); }
.desk-side { width: 22%; padding: 12px 10px; display: grid; align-content: start; gap: 9px; border-right: 1px solid var(--border); }
.desk-side span { height: 8px; border-radius: 4px; background: rgba(255, 255, 255, 0.08); }
.desk-side span:first-child { background: rgba(34, 211, 238, 0.5); }
.desk-main { flex: 1; padding: 12px; display: flex; flex-direction: column; gap: 12px; }
.desk-kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.desk-kpis span { height: 34px; border-radius: 8px; background: rgba(255, 255, 255, 0.05); border: 1px solid var(--border); }
.desk-kpis span:nth-child(1) { border-color: rgba(59, 130, 246, 0.5); }
.desk-kpis span:nth-child(2) { border-color: rgba(139, 92, 246, 0.5); }
.desk-kpis span:nth-child(3) { border-color: rgba(245, 158, 11, 0.5); }
.desk-kpis span:nth-child(4) { border-color: rgba(16, 185, 129, 0.5); }
.desk-bars { flex: 1; display: flex; align-items: flex-end; gap: 10px; padding: 8px 6px 0; border-bottom: 1px solid var(--border); }
.desk-bars i { flex: 1; height: var(--h); border-radius: 5px 5px 0 0; background: linear-gradient(180deg, var(--cyan), rgba(99, 102, 241, 0.35)); transform-origin: bottom; transform: scaleY(0); transition: transform 1.2s var(--ease); }
.in .desk-bars i { transform: scaleY(1); }
.desk-bars i:nth-child(2) { transition-delay: 0.08s; } .desk-bars i:nth-child(3) { transition-delay: 0.16s; }
.desk-bars i:nth-child(4) { transition-delay: 0.24s; } .desk-bars i:nth-child(5) { transition-delay: 0.32s; }
.desk-bars i:nth-child(6) { transition-delay: 0.4s; } .desk-bars i:nth-child(7) { transition-delay: 0.48s; }
.mobiles { height: 230px; display: flex; justify-content: center; align-items: center; gap: 22px; }
.mini-phone { width: 104px; height: 200px; padding: 14px 10px; border-radius: 22px; display: flex; flex-direction: column; gap: 8px; background: #0a1022; border: 1px solid var(--border-strong); box-shadow: 0 30px 50px -25px rgba(139, 92, 246, 0.6); animation: bob 6s ease-in-out infinite; }
.mini-phone.tilt { transform: rotate(6deg); animation-delay: -3s; }
.mp-h { height: 40px; border-radius: 10px; background: linear-gradient(135deg, #2563eb, #7c3aed); }
.mp-h.amber { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.mp-card { height: 26px; border-radius: 8px; background: rgba(255, 255, 255, 0.06); border: 1px solid var(--border); }
.mp-card.short { width: 70%; }
.mp-ring { width: 60px; height: 60px; margin: 8px auto; border-radius: 50%; background: conic-gradient(var(--cyan) 0 78%, rgba(255, 255, 255, 0.08) 78% 100%); -webkit-mask: radial-gradient(circle, transparent 55%, #000 56%); mask: radial-gradient(circle, transparent 55%, #000 56%); }

/* ---------- 应用场景 ---------- */
.scenes { overflow-x: clip; }
.scene-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; min-width: 0; }
.scene { position: relative; isolation: isolate; min-width: 0; padding: 28px 24px; border-radius: 20px; background: var(--surface); border: 1px solid var(--border); transition: transform 0.5s var(--ease), border-color 0.4s; }
.scene:hover { transform: translateY(-8px); border-color: var(--border-strong); }
.scene-art { position: relative; width: 64px; height: 64px; margin-bottom: 20px; display: grid; place-items: center; border-radius: 18px; color: #fff; }
.scene-art::after { content: ""; position: absolute; inset: 0; border-radius: inherit; filter: blur(18px); opacity: 0.55; background: inherit; z-index: -1; transition: opacity 0.4s; }
.scene:hover .scene-art::after { opacity: 0.95; }
.scene-art .ico { width: 30px; height: 30px; }
.s-safe { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.s-new { background: linear-gradient(135deg, #22d3ee, #3b82f6); }
.s-law { background: linear-gradient(135deg, #8b5cf6, #ec4899); }
.s-skill { background: linear-gradient(135deg, #10b981, #0ea5e9); }
.scene h3 { font-size: 18px; margin-bottom: 8px; }
.scene p { font-size: 14px; color: var(--text-2); }
.marquee { margin-top: 60px; max-width: 100%; overflow: hidden; contain: paint; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee-track { display: flex; width: max-content; gap: 14px; animation: marquee 36s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee span { padding: 10px 22px; border-radius: 999px; font-size: 15px; color: var(--text-2); background: var(--surface); border: 1px solid var(--border); white-space: nowrap; }
@keyframes marquee { to { transform: translateX(calc(-50% - 7px)); } }

/* ---------- 常见问题 ---------- */
.faq-list { display: grid; gap: 12px; }
.faq-list details { border-radius: 16px; background: var(--surface); border: 1px solid var(--border); transition: border-color 0.3s, background 0.3s; }
.faq-list details[open] { border-color: rgba(34, 211, 238, 0.4); background: rgba(34, 211, 238, 0.04); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 20px 24px; cursor: pointer; font-size: 16.5px; font-weight: 600; list-style: none; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary .ico { color: var(--cyan); transition: transform 0.4s var(--ease); }
.faq-list details[open] summary .ico { transform: rotate(45deg); }
.faq-a { padding: 0 24px 20px; color: var(--text-2); font-size: 15px; }
.faq-list details[open] .faq-a { animation: faqIn 0.5s var(--ease); }
@keyframes faqIn { from { opacity: 0; transform: translateY(-6px); } }

/* ---------- 联系 ---------- */
.contact { overflow: hidden; isolation: isolate; background: radial-gradient(ellipse 70% 60% at 50% 100%, rgba(99, 102, 241, 0.22), transparent 70%); }
.contact-bg { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -1; }
.contact-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.contact-copy h2 { font-size: clamp(30px, 3.8vw, 46px); line-height: 1.25; font-weight: 800; margin-bottom: 18px; }
.contact-copy > p:not(.kicker) { color: var(--text-2); font-size: 16.5px; }
.contact-ways { display: grid; gap: 12px; margin-top: 28px; }
.contact-ways li { display: flex; align-items: center; gap: 12px; font-size: 16px; }
.contact-ways .ico { width: 40px; height: 40px; padding: 10px; border-radius: 12px; color: var(--cyan); background: rgba(34, 211, 238, 0.1); border: 1px solid rgba(34, 211, 238, 0.25); }
.contact-form { padding: 32px; border-radius: 24px; display: grid; gap: 16px; background: rgba(12, 18, 40, 0.65); border: 1px solid var(--border-strong); backdrop-filter: blur(16px); box-shadow: 0 40px 80px -40px rgba(99, 102, 241, 0.6); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.field { display: grid; gap: 6px; }
.field label { font-size: 13.5px; color: var(--text-2); }
.field input, .field select { height: 46px; padding: 0 14px; border-radius: 12px; font: inherit; font-size: 15px; color: var(--text); background: rgba(255, 255, 255, 0.04); border: 1px solid var(--border-strong); outline: none; transition: border-color 0.3s, box-shadow 0.3s; }
.field select { appearance: none; -webkit-appearance: none; background-image: linear-gradient(45deg, transparent 50%, var(--text-2) 50%), linear-gradient(135deg, var(--text-2) 50%, transparent 50%); background-position: calc(100% - 20px) 20px, calc(100% - 15px) 20px; background-size: 5px 5px; background-repeat: no-repeat; }
.field select option { background: #0b1126; }
.field input::placeholder { color: var(--text-3); }
.field input:focus, .field select:focus { border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.15); }
.field.invalid input { border-color: #f87171; box-shadow: 0 0 0 4px rgba(248, 113, 113, 0.15); }
.form-tip { min-height: 1.4em; font-size: 13.5px; text-align: center; color: var(--text-2); }
.form-tip.ok { color: #34d399; }
.form-tip.err { color: #f87171; }

/* ---------- 页脚 ---------- */
.footer { padding: 46px 0 36px; border-top: 1px solid var(--border); background: #050816; }
.footer-inner { display: grid; grid-template-columns: auto 1fr; gap: 20px 40px; align-items: center; }
.footer-brand { display: grid; grid-template-columns: auto 1fr; column-gap: 10px; align-items: center; }
.footer-brand .brand-text { align-self: center; }
.footer-brand p { grid-column: 1 / -1; margin-top: 8px; font-size: 13.5px; color: var(--text-3); }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 6px 22px; font-size: 14px; color: var(--text-2); }
.footer-links a:hover { color: #fff; }
.copyright { grid-column: 1 / -1; padding-top: 20px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--text-3); }
.copyright a { color: var(--text-2); }

.back-top { position: fixed; right: 24px; bottom: 24px; z-index: 80; width: 46px; height: 46px; display: grid; place-items: center; border-radius: 14px; color: #fff; background: rgba(12, 18, 40, 0.8); border: 1px solid var(--border-strong); backdrop-filter: blur(10px); opacity: 0; transform: translateY(16px); pointer-events: none; transition: 0.4s var(--ease); }
.back-top .ico { transform: rotate(-90deg); }
.back-top.show { opacity: 1; transform: none; pointer-events: auto; }
.back-top:hover { border-color: var(--cyan); box-shadow: 0 0 20px rgba(34, 211, 238, 0.4); }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .nav-links a:not(.btn) { padding: 8px 9px; }
  .bento { grid-template-columns: repeat(2, 1fr); }
  .card-lg, .card-tail { grid-column: span 2; }
  .scene-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 960px) {
  .nav-toggle { display: grid; }
  .nav-links {
    position: fixed; top: var(--nav-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 2px; padding: 14px 20px 22px;
    background: rgba(7, 11, 26, 0.96); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border);
    transform: translateY(-12px); opacity: 0; pointer-events: none; transition: 0.35s var(--ease);
  }
  .nav-links.open { transform: none; opacity: 1; pointer-events: auto; }
  .nav-links a:not(.btn) { padding: 12px 8px; font-size: 16px; }
  .nav-links a:not(.btn)::after { left: 8px; right: auto; width: 24px; }
  .nav-cta { margin: 10px 0 0; height: 46px; }
  .nav.menu-open { background: rgba(7, 11, 26, 0.96); }

  .hero-inner { grid-template-columns: 1fr; text-align: center; gap: 30px; }
  .hero-sub { margin-inline: auto; }
  .hero-actions, .hero-points { justify-content: center; }
  .hero-visual { max-width: 420px; }
  .chip-a { left: 0; } .chip-b { right: 0; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--border); }

  .loop-line { left: 38px; right: auto; top: 0; bottom: 0; width: 2px; height: auto; }
  .loop-fill { transform-origin: top; transform: scaleY(0); }
  .loop-comet { display: none; }
  .loop-steps { grid-template-columns: 1fr; gap: 28px; }
  .loop-step { display: grid; grid-template-columns: 78px 1fr; column-gap: 20px; text-align: left; padding: 0; }
  .loop-node { grid-row: span 3; margin: 0; }
  .loop-step h3 { margin: 2px 0 4px; }

  .showcase-wrap { grid-template-columns: 1fr; gap: 28px; }
  .showcase-device { position: relative; top: 0; height: auto; padding: 10px 0; order: -1; }
  .phone { width: min(250px, 66vw); }
  .chapters li:nth-child(4), .cert-list { display: none; }
  .showcase-steps { display: grid; gap: 12px; }
  .sc-step { min-height: 0; padding: 16px 18px; cursor: pointer; border: 1px solid var(--border); border-radius: 16px; opacity: 0.55; }
  .sc-step::before { display: none; }
  .sc-step.is-active { opacity: 1; border-color: rgba(34, 211, 238, 0.45); background: rgba(34, 211, 238, 0.05); }
  .sc-step h3 { margin: 4px 0 6px; font-size: 18px; }
  .sc-step p { font-size: 14px; }

  .security-inner, .local-inner { grid-template-columns: 1fr; gap: 40px; }
  .local-visual { max-width: 360px; }
  .shield-visual { max-width: 340px; }
  .plat-grid { grid-template-columns: 1fr; }
  .contact-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 600px) {
  .container, .container.narrow { width: calc(100% - 32px); }
  .section { padding: 80px 0; }
  .section-head { margin-bottom: 40px; }
  .hero { padding-top: calc(var(--nav-h) + 24px); }
  .hero-title { letter-spacing: 0; }
  .btn-lg { height: 48px; padding: 0 22px; font-size: 15px; }
  .float-chip { padding: 7px 10px; font-size: 12px; }
  .float-chip .ico { width: 26px; height: 26px; padding: 5px; }
  .chip-b { top: 52%; }
  .stat { padding: 20px 16px; gap: 10px; flex-direction: column; align-items: flex-start; }
  .stat b { font-size: 36px; }
  .bento { grid-template-columns: 1fr; }
  .card-lg, .card-tail { grid-column: auto; }
  .card { padding: 24px; }
  .scene-grid { grid-template-columns: 1fr; }
  .desk { height: 190px; }
  .contact-form { padding: 22px; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

/* 尊重系统“减少动态效果”设置 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .js .reveal { opacity: 1; transform: none; filter: none; }
}

/* ==========================================================
   浅色风格：内容不变，只替换配色与表面质感
   ========================================================== */
html[data-theme="light"] {
  --bg: #f4f7fb;
  --bg-2: #ffffff;
  --surface: #ffffff;
  --surface-2: #eef3fa;
  --border: rgba(15, 23, 42, 0.08);
  --border-strong: rgba(15, 23, 42, 0.14);
  --text: #12182b;
  --text-2: #46516c;
  --text-3: #73809b;
  --cyan: #0891b2;
  --blue: #2563eb;
  --violet: #7c3aed;
  --amber: #d97706;
  --green: #059669;
  --pink: #db2777;
  --grad: linear-gradient(100deg, #0891b2 0%, #2563eb 48%, #7c3aed 100%);
  color-scheme: light;
}
html[data-theme="dark"] { color-scheme: dark; }

html[data-theme="light"] strong { color: #0f172a; }
html[data-theme="light"] ::selection { background: rgba(37, 99, 235, 0.18); color: #0f172a; }

html[data-theme="light"] .nav.scrolled,
html[data-theme="light"] .nav.menu-open {
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 8px 30px -18px rgba(15, 23, 42, 0.35);
}
html[data-theme="light"] .nav-links a:not(.btn):hover,
html[data-theme="light"] .nav-links a.active,
html[data-theme="light"] .footer-links a:hover { color: #0f172a; }

html[data-theme="light"] .aurora { opacity: 0.55; filter: blur(80px); }
html[data-theme="light"] .grid-floor {
  background-image: linear-gradient(rgba(37, 99, 235, 0.16) 1px, transparent 1px), linear-gradient(90deg, rgba(37, 99, 235, 0.16) 1px, transparent 1px);
}
html[data-theme="light"] .eyebrow {
  color: #0e7490;
  background: rgba(8, 145, 178, 0.1);
  border-color: rgba(8, 145, 178, 0.28);
}
html[data-theme="light"] .orbit span { border-color: rgba(37, 99, 235, 0.16); }
html[data-theme="light"] .orbit span:nth-child(2) { border-color: rgba(8, 145, 178, 0.28); }
html[data-theme="light"] .morph-label,
html[data-theme="light"] .float-chip,
html[data-theme="light"] .back-top {
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 16px 40px -20px rgba(15, 23, 42, 0.28);
}
html[data-theme="light"] .back-top { color: #12182b; }
html[data-theme="light"] .float-chip { box-shadow: 0 18px 40px -18px rgba(15, 23, 42, 0.28); }

html[data-theme="light"] .stats-grid,
html[data-theme="light"] .card,
html[data-theme="light"] .plat-card,
html[data-theme="light"] .scene,
html[data-theme="light"] .faq-list details,
html[data-theme="light"] .sec-list li,
html[data-theme="light"] .marquee span,
html[data-theme="light"] .media-tags span,
html[data-theme="light"] .loop-node {
  background: #fff;
  box-shadow: 0 14px 36px -22px rgba(15, 23, 42, 0.28);
}
html[data-theme="light"] .card:hover,
html[data-theme="light"] .scene:hover {
  box-shadow: 0 28px 50px -24px rgba(37, 99, 235, 0.32);
}
html[data-theme="light"] .loop-line { background: rgba(15, 23, 42, 0.1); }
html[data-theme="light"] .loop-step.lit .loop-node {
  color: #fff;
  background: linear-gradient(135deg, #22d3ee, #6366f1 70%, #8b5cf6);
}
html[data-theme="light"] .mp-bar,
html[data-theme="light"] .spotlight::before {
  background: rgba(15, 23, 42, 0.06);
}
html[data-theme="light"] .spotlight::before {
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(37, 99, 235, 0.1), transparent 45%);
}
html[data-theme="light"] .mp-bar { background: rgba(15, 23, 42, 0.08); }

html[data-theme="light"] .sat {
  background: #fff;
  box-shadow: 0 12px 28px -14px rgba(15, 23, 42, 0.35);
}
html[data-theme="light"] .radar span { border-color: rgba(8, 145, 178, 0.28); }
html[data-theme="light"] .shield-core { border-color: rgba(255, 255, 255, 0.7); }
html[data-theme="light"] .security {
  background: radial-gradient(ellipse 60% 50% at 20% 50%, rgba(99, 102, 241, 0.1), transparent 70%);
}
html[data-theme="light"] .local {
  background: radial-gradient(ellipse 50% 60% at 18% 50%, rgba(8, 145, 178, 0.08), transparent 70%);
}
html[data-theme="light"] .local-core,
html[data-theme="light"] .local-node,
html[data-theme="light"] .local-points li {
  background: #fff;
  box-shadow: 0 14px 36px -22px rgba(15, 23, 42, 0.28);
}
html[data-theme="light"] .local-boundary span { border-color: rgba(8, 145, 178, 0.45); }
html[data-theme="light"] .sec-list li:hover { background: rgba(8, 145, 178, 0.06); }

html[data-theme="light"] .contact {
  background: radial-gradient(ellipse 70% 60% at 50% 100%, rgba(99, 102, 241, 0.14), transparent 70%);
}
html[data-theme="light"] .contact-form {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 30px 70px -32px rgba(37, 99, 235, 0.4);
}
html[data-theme="light"] .field input,
html[data-theme="light"] .field select { background: #f4f7fb; }
html[data-theme="light"] .field select option { background: #fff; color: #12182b; }

html[data-theme="light"] .footer { background: #e8eef6; }
html[data-theme="light"] .faq-list details[open] { background: rgba(8, 145, 178, 0.06); }

@media (max-width: 960px) {
  html[data-theme="light"] .nav-links,
  html[data-theme="light"] .nav.menu-open { background: rgba(255, 255, 255, 0.97); }
  html[data-theme="light"] .sc-step.is-active { background: rgba(8, 145, 178, 0.08); }
}