/* ============================================================
   Kaikou 开口 — 设计系统 v2（Apple 风科技感）
   2026-10-03 重构：大标题排版 / 毛玻璃导航 / 明暗节奏 / 滚动动效
   ============================================================ */
:root {
  /* 品牌色系 */
  --teal: #1A8C6E;
  --teal-bright: #2BC49A;
  --teal-deep: #0F6148;
  --teal-ink: #0A3D2E;
  --grad-teal: linear-gradient(135deg, #2BC49A 0%, #1A8C6E 45%, #0F6148 100%);
  --grad-tech: linear-gradient(120deg, #2BC49A, #1A8C6E 40%, #1763A6 100%);

  /* 中性色（Apple 体系） */
  --bg: #FFFFFF;
  --bg-gray: #F5F5F7;
  --bg-dark: #060A09;
  --bg-dark-2: #0D1713;
  --ink: #1D1D1F;
  --ink-2: #6E6E73;
  --ink-3: #86868B;
  --line: rgba(0,0,0,0.08);
  --line-light: rgba(255,255,255,0.12);

  /* 玻璃 */
  --glass: rgba(255,255,255,0.72);
  --glass-dark: rgba(10,20,17,0.72);

  /* 圆角（Apple 风格大圆角） */
  --r-sm: 14px;
  --r-md: 20px;
  --r-lg: 28px;
  --r-xl: 36px;

  --maxw: 1200px;
  --shadow-soft: 0 8px 40px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 10px rgba(0,0,0,0.04), 0 24px 60px -20px rgba(0,0,0,0.12);
  --shadow-glow: 0 20px 80px -20px rgba(26,140,110,0.35);
}

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

html { scroll-behavior: auto; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro SC", "SF Pro Display", "SF Pro Text", "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
}

/* Lenis */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-smooth [data-lenis-prevent] { overscroll-behavior: contain; }
.lenis.lenis-stopped { overflow: hidden; }

a { color: var(--teal); text-decoration: none; transition: color .25s; }
a:hover { color: var(--teal-deep); }
img { display: block; max-width: 100%; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 32px; }

/* ---------- 滚动进度条 ---------- */
#scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 100%;
  background: transparent; z-index: 1000; pointer-events: none;
}
#scroll-progress .bar {
  height: 100%; width: 0%;
  background: var(--grad-teal);
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 12px rgba(26,140,110,0.5);
}

/* ---------- 触控导航（Apple 毛玻璃） ---------- */
.nav {
  position: sticky; top: 0; z-index: 900;
  background: var(--glass);
  -webkit-backdrop-filter: saturate(180%) blur(24px);
  backdrop-filter: saturate(180%) blur(24px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 32px;
  height: 56px; display: flex; align-items: center; justify-content: space-between;
}
.nav-brand { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 600; color: var(--ink); letter-spacing: -0.01em; }
.nav-brand img { width: 30px; height: 30px; border-radius: 7px; box-shadow: 0 1px 4px rgba(0,0,0,0.15); }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-size: 13.5px; color: var(--ink-2); font-weight: 500; letter-spacing: -0.01em; }
.nav-links a:hover { color: var(--ink); }
.nav-links .nav-cta {
  color: #fff !important; background: var(--grad-teal);
  padding: 7px 18px; border-radius: 980px; font-weight: 600;
  box-shadow: 0 4px 14px -4px rgba(26,140,110,0.5);
  transition: transform .2s, box-shadow .2s;
}
.nav-links .nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 20px -4px rgba(26,140,110,0.6); }

/* ---------- 通用区块 ---------- */
.section { padding: 120px 0; }
.section-gray { background: var(--bg-gray); }
.section-dark { background: var(--bg-dark); color: #F5F5F7; }
.section-dark h2, .section-dark h3 { color: #fff; }

/* 浅色品牌调区块（替代突兀的纯黑块） */
.section-tint {
  background: linear-gradient(180deg, #F0F7F4 0%, #E6F2EC 55%, #F0F7F4 100%);
  color: var(--ink);
}
.section-tint .stat .lbl { color: var(--ink-2); }

/* 平台卡底部说明行 */
.platform-card .p-foot { margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 13px; color: var(--ink-3); }

.sec-kicker {
  font-size: 14px; font-weight: 600; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--teal); margin-bottom: 14px;
}
.sec-head { text-align: center; }
.sec-head .sec-sub { margin-left: auto; margin-right: auto; }
.sec-head .sec-kicker { margin-left: auto; margin-right: auto; }
.section-dark .sec-kicker { color: var(--teal-bright); }
.sec-title {
  font-size: clamp(34px, 5vw, 58px); font-weight: 700;
  letter-spacing: -0.025em; line-height: 1.08; margin-bottom: 16px;
}
.sec-sub { font-size: clamp(17px, 2vw, 21px); color: var(--ink-2); max-width: 640px; }
.section-dark .sec-sub { color: rgba(255,255,255,0.66); }

.text-grad { background: var(--grad-tech); -webkit-background-clip: text; background-clip: text; color: transparent; }
.text-grad-teal { background: var(--grad-teal); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 30px; border-radius: 980px;
  font-size: 15.5px; font-weight: 600; letter-spacing: -0.01em;
  transition: transform .2s, box-shadow .2s, background .2s;
  white-space: nowrap;
}
.btn-primary { color: #fff; background: var(--grad-teal); box-shadow: 0 8px 30px -8px rgba(26,140,110,0.55); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -10px rgba(26,140,110,0.6); color: #fff; }
.btn-dark { color: #fff; background: var(--ink); box-shadow: 0 8px 30px -10px rgba(0,0,0,0.4); }
.btn-dark:hover { transform: translateY(-2px); color: #fff; }
.btn-ghost { color: var(--ink); background: rgba(0,0,0,0.05); }
.btn-ghost:hover { background: rgba(0,0,0,0.09); color: var(--ink); }
.btn-white { color: #111; background: #fff; box-shadow: 0 8px 30px -10px rgba(0,0,0,0.5); }
.btn-white:hover { transform: translateY(-2px); color: #111; }
.btn-lg { padding: 16px 36px; font-size: 17px; }
.btn .chev { font-size: 13px; opacity: 0.75; }

.link-more { display: inline-flex; align-items: center; gap: 6px; font-size: 16px; font-weight: 600; }
.link-more .chev { transition: transform .25s; }
.link-more:hover .chev { transform: translateX(3px); }

/* ---------- Hero ---------- */
.hero { position: relative; padding: 96px 0 40px; text-align: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero-bg .orb { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; }
.hero-bg .orb-a { width: 560px; height: 560px; background: radial-gradient(circle, rgba(43,196,154,0.35), transparent 65%); top: -160px; left: -120px; animation: orbFloat 14s ease-in-out infinite; }
.hero-bg .orb-b { width: 640px; height: 640px; background: radial-gradient(circle, rgba(26,140,110,0.28), transparent 65%); top: -120px; right: -180px; animation: orbFloat 18s ease-in-out infinite reverse; }
.hero-bg .orb-c { width: 420px; height: 420px; background: radial-gradient(circle, rgba(79,163,166,0.22), transparent 65%); bottom: -200px; left: 32%; animation: orbFloat 22s ease-in-out infinite; }
@keyframes orbFloat { 0%,100% { transform: translate(0,0) scale(1); } 50% { transform: translate(40px,-30px) scale(1.06); } }

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 7px 18px; border-radius: 980px;
  background: rgba(26,140,110,0.08); border: 1px solid rgba(26,140,110,0.25);
  font-size: 13.5px; font-weight: 600; color: var(--teal-deep);
  margin-bottom: 26px; letter-spacing: -0.01em;
}
.hero h1 {
  font-size: clamp(46px, 7.2vw, 88px); font-weight: 700;
  letter-spacing: -0.035em; line-height: 1.04; margin-bottom: 22px;
}
.hero .hero-sub { font-size: clamp(18px, 2.4vw, 24px); color: var(--ink-2); max-width: 660px; margin: 0 auto 36px; letter-spacing: -0.01em; }
.hero-ctas { display: flex; gap: 16px; justify-content: center; align-items: center; flex-wrap: wrap; }
.hero-note { margin-top: 18px; font-size: 13px; color: var(--ink-3); }

/* Hero 视觉（产品窗） */
.hero-visual { position: relative; margin-top: 72px; z-index: 1; }
.hero-window {
  max-width: 980px; margin: 0 auto;
  background: #fff; border-radius: 22px;
  border: 1px solid rgba(0,0,0,0.09);
  box-shadow: var(--shadow-card), 0 40px 120px -40px rgba(26,140,110,0.25);
  overflow: hidden;
  transform-origin: center top;
}
.hero-window .win-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 14px 20px; background: #F5F5F7; border-bottom: 1px solid rgba(0,0,0,0.06);
}
.hero-window .win-bar i { width: 12px; height: 12px; border-radius: 50%; display: block; }
.hero-window .win-bar i:nth-child(1) { background: #FF5F57; } .hero-window .win-bar i:nth-child(2) { background: #FEBC2E; } .hero-window .win-bar i:nth-child(3) { background: #28C840; }
.hero-window .win-bar .win-title { margin-left: 10px; font-size: 13px; color: var(--ink-3); }
.hero-window img { width: 100%; height: auto; }
.hero-float-chip {
  position: absolute; display: flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.85); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px);
  border: 1px solid rgba(0,0,0,0.08); border-radius: 16px;
  padding: 12px 18px; box-shadow: var(--shadow-soft);
  font-size: 14px; font-weight: 600; color: var(--ink);
  z-index: 2; animation: floatChip 6s ease-in-out infinite;
}
.hero-glow-chip .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 4px rgba(26,140,110,0.15); animation: pulse 2s infinite; }
.hero-glow-chip .sub { font-size: 12px; color: var(--ink-2); font-weight: 500; }
@keyframes floatChip { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-12px); } }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 3px rgba(26,140,110,0.18); } 50% { box-shadow: 0 0 0 8px rgba(26,140,110,0.05); } }
.chip-left { left: -30px; top: 34%; }
.chip-right { right: -26px; bottom: 12%; animation-delay: 1.6s; }

/* ---------- 场景大图章节（10 张效果图依次排开，全宽大图） ---------- */
.scene-row { display: grid; grid-template-columns: 1fr; gap: 36px; padding: 80px 0; border-bottom: 1px solid var(--line); text-align: center; }
.scene-row:last-child { border-bottom: none; }
.scene-row.reverse .scene-img { order: 0; }
.scene-num { font-size: 15px; font-weight: 700; letter-spacing: 0.14em; color: var(--teal); margin-bottom: 10px; }
.scene-copy h3 { font-size: clamp(26px, 3.2vw, 38px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 14px; line-height: 1.2; }
.scene-copy .scene-tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 16px; border-radius: 999px; background: rgba(26,140,110,0.09); color: var(--teal-deep); font-size: 13px; font-weight: 600; margin-bottom: 18px; }
.scene-copy p { font-size: 16px; color: var(--ink-2); line-height: 1.8; max-width: 680px; margin: 0 auto; }
.scene-copy .scene-note { margin-top: 16px; font-size: 13.5px; color: var(--ink-3); border-left: none; padding-left: 0; max-width: 680px; }
.scene-img { max-width: 1024px; width: 100%; margin: 0 auto; }
.scene-img .hero-window { margin: 0; box-shadow: var(--shadow-card); }
.scene-img img { width: 100%; height: auto; }

/* ---------- 视频场景大区（苹果式滚动自动播放） ---------- */
.video-scene video { width: 100%; display: block; aspect-ratio: 16/9; object-fit: cover; background: #000; }
.video-scene .hero-window { position: relative; }
.video-scene .win-bar { background: #1c1c1e; }
.video-scene .win-bar .win-title { color: rgba(255,255,255,0.6); }
@media (max-width: 900px) {
  .scene-row { grid-template-columns: 1fr; gap: 24px; padding: 52px 0; }
  .scene-row.reverse .scene-img { order: 0; }
  .scene-img { max-width: 100%; }
}

/* ---------- 统计条 ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat { text-align: center; }
.stat .num { font-size: clamp(38px, 4.6vw, 56px); font-weight: 700; letter-spacing: -0.03em; color: var(--ink); background: var(--grad-teal); -webkit-background-clip: text; background-clip: text; color: transparent; }
.section-dark .stat .num { background: linear-gradient(135deg,#6FE3C0,#2BC49A); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat .lbl { font-size: 15px; color: var(--ink-2); margin-top: 4px; }

/* ---------- 卡片 ---------- */
.grid { display: grid; gap: 20px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
  padding: 34px 30px; transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s;
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card); }
.card .ico {
  width: 52px; height: 52px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(26,140,110,0.1); color: var(--teal);
  font-size: 24px; margin-bottom: 20px;
}
.card h3 { font-size: 19px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 8px; }
.card p { font-size: 14.5px; color: var(--ink-2); line-height: 1.65; }

.card-dark { background: #0E1713; border-color: rgba(255,255,255,0.08); }
.card-dark h3 { color: #fff; }
.card-dark p { color: rgba(255,255,255,0.62); }
.card-dark .ico { background: rgba(43,196,154,0.12); color: #2BC49A; }

/* 平台大卡 */
.platform-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.platform-card {
  border-radius: var(--r-lg); padding: 40px 38px; position: relative; overflow: hidden;
  background: #fff; border: 1px solid var(--line);
  transition: transform .35s, box-shadow .35s;
}
.platform-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card); }
.platform-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: var(--grad-teal);
}
.platform-card .p-ico { width: 60px; height: 60px; border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 28px; margin-bottom: 22px; background: rgba(26,140,110,0.1); }
.platform-card .p-ver { display: inline-flex; align-items: center; gap: 6px; padding: 4px 12px; border-radius: 999px; background: rgba(26,140,110,0.1); color: var(--teal-deep); font-size: 12.5px; font-weight: 600; margin-bottom: 14px; }
.platform-card h3 { font-size: 26px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 10px; }
.platform-card .p-desc { font-size: 15px; color: var(--ink-2); margin-bottom: 20px; line-height: 1.65; }
.platform-card ul { list-style: none; margin-bottom: 26px; }
.platform-card ul li { font-size: 14px; color: var(--ink-2); padding: 5px 0; display: flex; gap: 8px; }
.platform-card ul li::before { content: "✓"; color: var(--teal); font-weight: 700; }

.platform-soon {
  border: 1px dashed rgba(134,134,139,0.4); background: rgba(0,0,0,0.02);
  border-radius: var(--r-lg); padding: 40px 32px; text-align: center;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 10px;
}
.platform-soon .soon-ico { font-size: 30px; opacity: 0.5; }
.platform-soon h4 { font-size: 18px; font-weight: 600; color: var(--ink-2); }
.platform-soon p { font-size: 13.5px; color: var(--ink-3); }
.soon-tag { display: inline-flex; align-items: center; gap: 6px; font-size: 12px; font-weight: 600; color: var(--ink-3); background: rgba(0,0,0,0.04); padding: 4px 12px; border-radius: 999px; }
.soon-tag .spin { width: 8px; height: 8px; border-radius: 50%; border: 2px solid rgba(0,0,0,0.15); border-top-color: var(--teal); animation: spin 1.2s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.platform-soon-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 24px; }

/* ---------- 功能条目（大排版） ---------- */
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }
.feature-row.reverse .feature-media { order: 2; }
.feature-row .feature-copy h3 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 700; letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 18px; }
.feature-row .feature-copy p { font-size: 17px; color: var(--ink-2); margin-bottom: 20px; line-height: 1.7; }
.feature-row .feature-copy .feat-list { list-style: none; }
.feature-row .feature-copy .feat-list li { font-size: 15px; color: var(--ink-2); padding: 7px 0; display: flex; gap: 10px; align-items: flex-start; }
.feature-row .feature-copy .feat-list li::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--grad-teal); margin-top: 9px; flex-shrink: 0; }
.feature-media img { border-radius: var(--r-lg); box-shadow: var(--shadow-card); width: 100%; }
.feature-media .media-frame { border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid var(--line); background: #fff; }

/* ---------- 截图画廊 ---------- */
.gallery-wrap { overflow-x: auto; padding-bottom: 16px; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; }
.gallery-track { display: flex; gap: 20px; width: max-content; }
.gallery-item { scroll-snap-align: center; flex-shrink: 0; }
.gallery-item img { width: min(420px, 76vw); border-radius: var(--r-md); box-shadow: var(--shadow-card); border: 1px solid var(--line); }

/* ---------- 视频卡 ---------- */
.video-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.video-card { border-radius: var(--r-md); overflow: hidden; background: #000; position: relative; border: 1px solid var(--line); }
.video-card video { width: 100%; display: block; aspect-ratio: 16/9; object-fit: cover; }
.video-card .vc-label { padding: 16px 20px; background: #fff; font-size: 15px; font-weight: 600; }
.video-card .vc-label span { display: block; font-size: 13px; color: var(--ink-3); font-weight: 500; margin-top: 2px; }

/* ---------- 下载区 ---------- */
.download-hero { position: relative; overflow: hidden; }
.download-hero::before {
  content: ""; position: absolute; inset: 0;
  background:
    radial-gradient(600px 300px at 20% 0%, rgba(43,196,154,0.18), transparent 60%),
    radial-gradient(700px 340px at 85% 100%, rgba(26,140,110,0.22), transparent 60%);
  pointer-events: none;
}
.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }
.dl-card {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--r-lg); padding: 42px 36px; text-align: center;
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  transition: transform .3s, border-color .3s;
}
.dl-card:hover { transform: translateY(-4px); border-color: rgba(43,196,154,0.5); }
.dl-card .dl-ico { font-size: 34px; margin-bottom: 16px; }
.dl-card h3 { font-size: 24px; font-weight: 700; color: #fff; margin-bottom: 6px; letter-spacing: -0.02em; }
.dl-card .dl-ver { font-size: 14px; color: rgba(255,255,255,0.55); margin-bottom: 20px; }
.dl-card .dl-note { font-size: 13.5px; color: rgba(255,255,255,0.6); margin-top: 16px; line-height: 1.6; }
.dl-qr-row { display: flex; justify-content: center; gap: 26px; margin-top: 26px; }
.dl-qr { text-align: center; }
.dl-qr img { width: 128px; height: 128px; border-radius: 12px; background: #fff; padding: 8px; box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5); }
.dl-qr .qr-lbl { font-size: 12.5px; color: rgba(255,255,255,0.65); margin-top: 10px; }
.qr-note { text-align: center; color: rgba(255,255,255,0.4); font-size: 12.5px; margin-top: 12px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--bg-dark); color: rgba(255,255,255,0.65); padding: 80px 0 36px; }
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 56px; }
.footer-brand .nav-brand { color: #fff; margin-bottom: 14px; }
.footer-brand p { font-size: 13.5px; color: rgba(255,255,255,0.5); line-height: 1.7; max-width: 300px; }
.footer h4 { color: #fff; font-size: 13px; font-weight: 600; margin-bottom: 16px; letter-spacing: 0.02em; }
.footer ul { list-style: none; }
.footer li { margin: 9px 0; }
.footer a { color: rgba(255,255,255,0.55); font-size: 13px; }
.footer a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; font-size: 12px; color: rgba(255,255,255,0.35); }
.footer-bottom .beian-row { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }

/* ---------- 滚动动效（GSAP 初始态） ---------- */
[data-reveal] { opacity: 0; transform: translateY(36px); will-change: transform, opacity; }
[data-reveal="left"] { transform: translateX(-44px); }
[data-reveal="right"] { transform: translateX(44px); }
[data-reveal="scale"] { transform: scale(0.92); }
html.no-js [data-reveal], html.no-gsap [data-reveal] { opacity: 1; transform: none; }

/* ---------- 辅助页（docs 风） ---------- */
.doc-content { max-width: 880px; margin: 0 auto; padding: 72px 32px 100px; }
.doc-content h1 { font-size: clamp(30px, 4vw, 44px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 20px; }
.doc-content h2 { font-size: 24px; font-weight: 700; margin: 44px 0 14px; letter-spacing: -0.01em; }
.doc-content h3 { font-size: 18px; font-weight: 600; margin: 28px 0 10px; }
.doc-content p, .doc-content li { font-size: 15.5px; color: var(--ink-2); line-height: 1.75; }
.doc-content a { color: var(--teal); }
.doc-hero { background: var(--bg-gray); border-bottom: 1px solid var(--line); padding: 64px 0 56px; }
.doc-hero h1 { font-size: clamp(32px, 4.4vw, 48px); font-weight: 700; letter-spacing: -0.025em; margin-bottom: 10px; }
.doc-hero p { color: var(--ink-2); font-size: 16.5px; }

/* ---------- 图片动效（交互态） ---------- */
.hero-visual { perspective: 1400px; }
.hero-window { transform-style: preserve-3d; will-change: transform; }

/* 截图画廊：悬停上浮放大 */
.gallery-item { overflow: visible; }
.gallery-item img {
  transition: transform .45s cubic-bezier(.2,.8,.2,1), box-shadow .45s ease;
}
.gallery-item:hover img {
  transform: scale(1.045) translateY(-6px);
  box-shadow: 0 30px 70px -18px rgba(0,0,0,0.3), 0 0 0 1px rgba(26,140,110,0.18);
}

/* 会议焦点区大图：悬停轻微缩放 */
.feature-media img, .feature-media .media-frame {
  transition: transform .5s cubic-bezier(.2,.8,.2,1);
}
.feature-media:hover img { transform: scale(1.03); }

/* 下载区二维码：悬停放大 + 品牌光晕 */
.dl-qr img { transition: transform .35s ease, box-shadow .35s ease; }
.dl-qr:hover img {
  transform: scale(1.08);
  box-shadow: 0 14px 44px -10px rgba(43,196,154,0.55), 0 0 0 4px rgba(43,196,154,0.12);
}

/* Hero 悬浮芯片已有浮动；产品窗浮动由 GSAP 统一驱动 */

/* ---------- 全屏沉浸式放大（苹果式滚动 zoom） ---------- */
.zoom-scene { padding: 40px 0 0; text-align: center; }
.zoom-scene .scene-copy { max-width: 760px; margin: 0 auto 40px; }
.zoom-scene .scene-copy h3 { font-size: clamp(26px, 3.2vw, 38px); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 14px; }
.zoom-scene .scene-copy .scene-tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 16px; border-radius: 999px; background: rgba(26,140,110,0.09); color: var(--teal-deep); font-size: 13px; font-weight: 600; margin-bottom: 18px; }
.zoom-scene .scene-copy p { font-size: 16px; color: var(--ink-2); line-height: 1.8; }
.zoom-scene .scene-copy .scene-note { margin-top: 14px; font-size: 13.5px; color: var(--ink-3); }
.zoom-wrap { height: 188vh; position: relative; }
.zoom-sticky {
  position: sticky; top: 0; height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; background: #F5F5F7;   /* 周围底色，放大时渐变变浅 */
}
.zoom-frame { width: min(1024px, 92vw); will-change: transform; transform-origin: center center; }
.zoom-frame .win-bar { background: #F5F5F7; }
.zoom-frame img, .zoom-frame video { width: 100%; display: block; }
.zoom-scene + .zoom-scene { margin-top: 24px; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .video-grid { grid-template-columns: 1fr; max-width: 560px; margin: 0 auto; }
  .feature-row { grid-template-columns: 1fr; gap: 44px; }
  .feature-row .feature-media { order: 0 !important; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .chip-left, .chip-right { display: none; }
}
@media (max-width: 768px) {
  .section { padding: 80px 0; }
  .container { padding: 0 22px; }
  .nav-inner { padding: 0 22px; }
  .nav-links a:not(.nav-cta) { display: none; }
  .nav-links { gap: 12px; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .platform-grid { grid-template-columns: 1fr; }
  .platform-soon-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .dl-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 84px; }
  .hero-visual { margin-top: 52px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}