@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;600;700&display=swap');

/* ─── 辰后生物 · Design Tokens (Apple + Biotech) ─── */
:root {
  --bg: #ffffff;
  --surface: #f5f5f7;
  --surface-warm: #fbfbfd;
  --surface-dark: #000000;
  --fg-on-dark: #f5f5f7;
  --muted-on-dark: rgba(245, 245, 247, 0.65);
  --fg: #1d1d1f;
  --fg-2: #424245;
  --muted: #6e6e73;
  --meta: #86868b;
  --border: #d2d2d7;
  --border-soft: #e8e8ed;
  --accent: #0d7377;
  --accent-on: #ffffff;
  --accent-hover: #0a8688;
  --accent-active: #0a5f62;
  --accent-soft: color-mix(in oklch, var(--accent) 12%, transparent);
  --fg-soft: color-mix(in oklch, var(--fg) 5%, transparent);
  --success: #16a34a;
  --warn: #eab308;
  --danger: #dc2626;
  --font-display: "Noto Serif SC", "Source Han Serif SC", "Songti SC", Georgia, "Times New Roman", serif;
  --font-body: "SF Pro Text", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
  --font-mono: "SF Mono", ui-monospace, "JetBrains Mono", Menlo, Monaco, Consolas, monospace;
  --fs-h1: clamp(40px, 5.5vw, 72px);
  --fs-h2: clamp(30px, 3.8vw, 48px);
  --fs-h3: 21px;
  --fs-lead: 18px;
  --fs-body: 16px;
  --fs-sm: 14px;
  --fs-meta: 12px;
  --leading-body: 1.75;
  --leading-tight: 1.15;
  --tracking-display: -0.01em;
  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px;
  --space-5: 20px; --space-6: 24px; --space-8: 32px; --space-12: 48px; --space-16: 64px;
  --section-y: clamp(64px, 10vw, 100px);
  --container: 1080px;
  --gutter: clamp(16px, 4vw, 32px);
  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 18px; --radius-pill: 980px;
  --elev-flat: none;
  --elev-ring: 0 0 0 1px var(--border);
  --elev-raised: 0 8px 24px rgba(0, 0, 0, 0.06);
  --focus-ring: 0 0 0 4px color-mix(in oklab, var(--accent), transparent 65%);
  --motion-fast: 150ms;
  --motion-base: 220ms;
  --ease: cubic-bezier(0.28, 0, 0.22, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--font-body); font-size: var(--fs-body);
  line-height: var(--leading-body);
  text-rendering: optimizeLegibility; -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
p { text-wrap: pretty; }
h1, h2, h3, h4 { text-wrap: balance; font-family: var(--font-display); }

.container { max-width: var(--container); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: var(--section-y); }
.section + .section { border-top: 1px solid var(--border-soft); }
.section--alt { background: var(--surface); }
.stack { display: flex; flex-direction: column; }
.stack > * + * { margin-top: var(--space-5); }
.row { display: flex; align-items: center; gap: var(--space-5); }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-8); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
.grid-2-1 { display: grid; grid-template-columns: 2fr 1fr; gap: var(--space-12); align-items: start; }
.grid-1-2 { display: grid; grid-template-columns: 1fr 2fr; gap: var(--space-12); align-items: start; }
@media (max-width: 920px) {
  .grid-2, .grid-3, .grid-4, .grid-2-1, .grid-1-2 { grid-template-columns: 1fr; }
}

.h1, h1 { font-size: var(--fs-h1); line-height: var(--leading-tight); letter-spacing: var(--tracking-display); margin: 0; font-weight: 600; }
.h2, h2 { font-size: var(--fs-h2); line-height: 1.2; letter-spacing: var(--tracking-display); margin: 0; font-weight: 600; }
.h3, h3 { font-size: var(--fs-h3); font-weight: 600; line-height: 1.35; margin: 0; }
.lead { font-size: var(--fs-lead); line-height: 1.7; color: var(--muted); max-width: 56ch; margin: 0; }
.eyebrow,
.hero .eyebrow,
.brand-hero .eyebrow,
.section .eyebrow {
  font-family: var(--font-mono) !important;
  font-size: var(--fs-meta) !important;
  font-weight: 400 !important;
  letter-spacing: 0.1em !important;
  text-transform: uppercase !important;
  color: var(--accent) !important;
  line-height: 1.4 !important;
  margin: 0 0 var(--space-5) !important;
}
.meta { font-family: var(--font-mono); font-size: var(--fs-meta); color: var(--muted); }
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.topnav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in oklch, var(--bg) 88%, transparent);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-soft);
}
.topnav-inner { display: flex; align-items: center; justify-content: space-between; padding-block: 14px; gap: var(--space-8); }
.topnav .logo { font-family: var(--font-display); font-size: 18px; font-weight: 600; letter-spacing: 0.02em; white-space: nowrap; }
.topnav nav { display: flex; gap: var(--space-6); flex-wrap: wrap; }
.topnav nav a { font-size: var(--fs-sm); color: var(--muted); transition: color var(--motion-fast) var(--ease); position: relative; padding-bottom: 2px; }
.topnav nav a:hover { color: var(--fg); }
.topnav nav a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 4px; }
.topnav nav a.active { color: var(--fg); font-weight: 500; }
.topnav nav a.active::after {
  content: ''; position: absolute; bottom: -2px; left: 0; right: 0;
  height: 2px; background: var(--accent); border-radius: 1px;
}
.nav-toggle { display: none; background: none; border: none; padding: 8px; color: var(--fg); }
@media (max-width: 768px) {
  .topnav nav { display: none; }
  .topnav nav.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--bg); border-bottom: 1px solid var(--border);
    padding: var(--space-4) var(--gutter); box-shadow: var(--elev-raised);
  }
  .nav-toggle { display: block; }
  .topnav .btn { display: none; }
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-pill);
  border: 1px solid transparent; font-size: var(--fs-sm);
  font-weight: 500; transition: all var(--motion-fast) var(--ease);
  text-decoration: none; line-height: 1.4;
}
.btn:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.btn:active { transform: translateY(1px); }
.btn[disabled], .btn[aria-disabled="true"] { opacity: 0.45; pointer-events: none; }
.btn-primary { background: var(--accent); color: var(--accent-on); border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-primary:active { background: var(--accent-active); border-color: var(--accent-active); }
.btn-secondary { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--fg); background: var(--fg-soft); }
.btn-ghost { background: transparent; color: var(--fg); border-color: transparent; padding-inline: 8px; }
.btn-ghost:hover { color: var(--accent); }
.btn-arrow::after { content: '\2192'; transition: transform var(--motion-fast) var(--ease); }
.btn-arrow:hover::after { transform: translateX(3px); }

.card {
  background: var(--surface); border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg); padding: 28px;
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.card:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.card--on-alt { background: var(--bg); }
.card-flat { background: transparent; border: 0; padding: 0; }
.card-rule { background: transparent; border: 0; border-top: 1px solid var(--border); padding: 24px 0 0; border-radius: 0; }

.feature .feature-mark {
  width: 36px; height: 36px; display: grid; place-items: center;
  border: 1px solid var(--border-soft); border-radius: 10px;
  color: var(--accent); margin-bottom: var(--space-5);
}
.feature .feature-mark svg { width: 18px; height: 18px; }
.feature h3 { margin-bottom: 6px; }
.feature p { margin: 0; color: var(--muted); font-size: 15px; }

.stat .stat-num {
  font-family: var(--font-display); font-size: clamp(48px, 7vw, 80px);
  line-height: 0.95; letter-spacing: -0.03em; color: var(--accent); font-weight: 600;
}
.stat .stat-label { color: var(--muted); font-size: var(--fs-sm); margin-top: 8px; max-width: 24ch; }
.stat .stat-unit { font-size: 0.45em; opacity: 0.7; margin-left: 2px; }

.quote {
  font-family: var(--font-display); font-size: clamp(22px, 2.4vw, 30px);
  line-height: 1.45; letter-spacing: -0.005em; max-width: 32ch;
}
.quote-author { color: var(--muted); font-size: var(--fs-sm); margin-top: var(--space-5); }
.quote-mark {
  font-family: var(--font-display); font-size: 120px; line-height: 0.7;
  color: var(--accent); opacity: 0.15; margin-bottom: -24px;
}
.testimonial-quote {
  font-family: var(--font-display); font-size: 18px; line-height: 1.55;
  letter-spacing: -0.005em; margin: 0; color: var(--fg);
}
.testimonial-author {
  margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border-soft);
}
.testimonial-author-name {
  font-weight: 600; font-size: 14px; margin: 0;
}
.testimonial-author .meta { margin: 2px 0 0; }

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; background: var(--accent-soft); color: var(--accent);
  border-radius: var(--radius-pill); font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.04em; text-transform: uppercase;
}
.tag {
  display: inline-flex; align-items: center; padding: 4px 10px;
  background: transparent; color: var(--muted);
  border: 1px solid var(--border); border-radius: var(--radius-pill); font-size: 12px;
}

.ph-img {
  background: linear-gradient(135deg, var(--accent-soft), var(--fg-soft)), var(--surface);
  border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  aspect-ratio: 16 / 10; display: grid; place-items: center;
  color: var(--muted); font-family: var(--font-mono); font-size: var(--fs-meta);
}
.ph-img.wide { aspect-ratio: 16 / 9; }
.ph-img.square { aspect-ratio: 1 / 1; }
.ph-img.portrait { aspect-ratio: 3 / 4; }

.cert-grid { gap: 32px; }
.cert-card {
  background: var(--bg); border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.cert-card:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.cert-preview {
  position: relative; display: flex; align-items: center; justify-content: center;
  min-height: 200px; background: var(--surface);
  border-bottom: 1px solid var(--border-soft); padding: 32px;
  color: var(--meta);
}
.cert-img-preview {
  width: 100%; height: 200px; object-fit: contain;
  display: block;
}
.cert-img-btn {
  display: block; width: 100%; padding: 0; margin: 0;
  border: none; background: none; cursor: zoom-in;
  transition: transform var(--motion-fast) var(--ease-standard);
}
.cert-img-btn:hover { transform: scale(1.03); }
.cert-img-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}
.cert-badge {
  position: absolute; top: 12px; right: 12px;
  padding: 3px 10px; border-radius: var(--radius-pill);
  background: var(--surface); border: 1px solid var(--border);
  font-family: var(--font-mono); font-size: 11px;
  letter-spacing: 0.04em; text-transform: uppercase;
  color: var(--muted);
}
.cert-info {
  padding: 28px; display: flex; flex-direction: column; gap: 12px;
}
.cert-info h3 { font-size: 19px; margin: 0; }
.cert-info p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.cert-info .btn { margin-top: 8px; align-self: flex-start; }
@media (max-width: 920px) {
  .cert-grid { grid-template-columns: 1fr !important; }
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 13px; color: var(--muted); font-weight: 500; }
.input, .textarea {
  width: 100%; padding: 11px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--fg); font: inherit; font-size: 15px;
  transition: border-color var(--motion-fast) var(--ease), box-shadow var(--motion-fast) var(--ease);
}
.input:hover, .textarea:hover { border-color: var(--meta); }
.input:focus, .textarea:focus { outline: none; border-color: var(--accent); box-shadow: var(--focus-ring); }
.textarea { min-height: 96px; resize: vertical; line-height: var(--leading-body); }

.section-head { max-width: 52ch; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(28px, 3vw, 40px); }

a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 3px; }

.ds-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; border-radius: var(--radius-md); }
.ds-table { width: 100%; border-collapse: collapse; font-size: var(--fs-sm); min-width: 600px; }
.ds-table th, .ds-table td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--border-soft); }
.ds-table th {
  color: var(--muted); font-weight: 500; font-family: var(--font-mono);
  font-size: var(--fs-meta); letter-spacing: 0.04em; text-transform: uppercase;
}
.ds-table tbody tr:hover { background: var(--fg-soft); }

.hero { padding-block: clamp(100px, 18vw, 200px); min-height: 100vh; min-height: 100dvh; display: flex; align-items: center; }
.hero-center { text-align: center; max-width: 680px; margin-inline: auto; }
.hero h1 { margin-bottom: var(--space-6); max-width: 680px; margin-inline: auto; font-size: clamp(32px, 4.5vw, 60px); text-wrap: auto; }
.hero .lead { color: var(--muted); font-size: var(--fs-lead); line-height: 1.85; max-width: 600px; margin-inline: auto; margin-top: var(--space-6); }
.hero-cta { display: inline-flex; gap: var(--space-3); flex-wrap: wrap; }
.hero-center .hero-cta { justify-content: center; }
.hero-split { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
@media (max-width: 920px) { .hero-split { grid-template-columns: 1fr; } }

/* ─── Hero Background System ─── */
.hero, .brand-hero {
  position: relative;
  overflow: hidden;
}
.hero::before, .brand-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}
.hero::after, .brand-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: color-mix(in oklch, var(--bg) 45%, transparent);
}
.hero > .container, .brand-hero > .container {
  position: relative;
  z-index: 1;
}

/* 首页 */
.hero[data-page="index"]::before {
  background-image:
    radial-gradient(ellipse 600px 400px at 15% 30%, color-mix(in oklch, var(--accent) 8%, transparent), transparent),
    radial-gradient(ellipse 500px 500px at 85% 70%, color-mix(in oklch, var(--accent) 6%, transparent), transparent),
    radial-gradient(ellipse 300px 300px at 50% 50%, color-mix(in oklch, var(--accent) 4%, transparent), transparent),
    url("https://wuduoqiang.oss-cn-guangzhou.aliyuncs.com/chgj/%E9%A6%96%E9%A1%B5.png");
}

/* 企业简介 */
.hero[data-page="about"]::before, .brand-hero[data-page="about"]::before {
  background-image:
    radial-gradient(ellipse 700px 500px at 80% 20%, color-mix(in oklch, var(--accent) 7%, transparent), transparent),
    radial-gradient(ellipse 500px 400px at 20% 80%, color-mix(in oklch, var(--accent) 5%, transparent), transparent),
    radial-gradient(circle 200px at 60% 60%, color-mix(in oklch, var(--accent) 3%, transparent), transparent),
    url("https://wuduoqiang.oss-cn-guangzhou.aliyuncs.com/chgj/%E4%BC%81%E4%B8%9A%E7%AE%80%E4%BB%8B.png");
}

/* 资质背书 */
.hero[data-page="credentials"]::before {
  background-image:
    radial-gradient(ellipse 500px 500px at 50% 30%, color-mix(in oklch, var(--accent) 6%, transparent), transparent),
    radial-gradient(ellipse 400px 300px at 20% 70%, color-mix(in oklch, var(--accent) 4%, transparent), transparent),
    radial-gradient(ellipse 400px 300px at 80% 70%, color-mix(in oklch, var(--accent) 4%, transparent), transparent),
    url("https://wuduoqiang.oss-cn-guangzhou.aliyuncs.com/chgj/%E8%B5%84%E8%B4%A8%E8%83%8C%E4%B9%A6.png");
}

/* 研究数据 */
.hero[data-page="research"]::before {
  background-image:
    radial-gradient(ellipse 600px 400px at 70% 25%, color-mix(in oklch, var(--accent) 7%, transparent), transparent),
    radial-gradient(ellipse 400px 400px at 30% 75%, color-mix(in oklch, var(--accent) 5%, transparent), transparent),
    url("https://wuduoqiang.oss-cn-guangzhou.aliyuncs.com/chgj/%E7%A0%94%E7%A9%B6%E6%95%B0%E6%8D%AE.png");
}

/* 项目介绍 */
.hero[data-page="projects"]::before {
  background-image:
    radial-gradient(ellipse 500px 600px at 25% 40%, color-mix(in oklch, var(--accent) 10%, transparent), transparent),
    radial-gradient(ellipse 400px 300px at 75% 60%, color-mix(in oklch, var(--accent) 6%, transparent), transparent),
    conic-gradient(from 180deg at 50% 50%, color-mix(in oklch, var(--accent) 3%, transparent), transparent 30%, color-mix(in oklch, var(--accent) 2%, transparent) 60%, transparent),
    url("https://wuduoqiang.oss-cn-guangzhou.aliyuncs.com/chgj/%E9%A1%B9%E7%9B%AE%E4%BB%8B%E7%BB%8D.png");
}

/* 成果展示 */
.hero[data-page="achievements"]::before {
  background-image:
    radial-gradient(ellipse 600px 400px at 50% 40%, color-mix(in oklch, var(--accent) 8%, transparent), transparent),
    radial-gradient(ellipse 300px 300px at 15% 60%, color-mix(in oklch, var(--accent) 5%, transparent), transparent),
    radial-gradient(ellipse 300px 300px at 85% 60%, color-mix(in oklch, var(--accent) 5%, transparent), transparent),
    url("https://wuduoqiang.oss-cn-guangzhou.aliyuncs.com/chgj/%E6%88%90%E6%9E%9C%E5%B1%95%E7%A4%BA.png");
}

/* 合作反馈 */
.hero[data-page="feedback"]::before {
  background-image:
    radial-gradient(ellipse 600px 400px at 30% 35%, color-mix(in oklch, var(--accent) 7%, transparent), transparent),
    radial-gradient(ellipse 500px 400px at 70% 65%, color-mix(in oklch, var(--accent) 5%, transparent), transparent),
    url("https://wuduoqiang.oss-cn-guangzhou.aliyuncs.com/chgj/%E5%90%88%E4%BD%9C%E5%8F%8D%E9%A6%88.png");
}

/* heroGlow removed — ::after now used for text readability overlay */

.log-row {
  display: grid; grid-template-columns: 100px 1fr 100px;
  gap: var(--space-8); padding: 22px 0;
  border-top: 1px solid var(--border-soft); align-items: baseline;
}
.log-row .meta { color: var(--muted); }
.log-row h3 { font-size: 19px; }
.log-row .pull { text-align: right; }
@media (max-width: 640px) { .log-row { grid-template-columns: 1fr; gap: var(--space-2); } .log-row .pull { text-align: left; } }

.rule { border: 0; border-top: 1px solid var(--border-soft); margin: 0; }
.rule-strong { border: 0; border-top: 1px solid var(--fg); margin: 0; }

.pagefoot { padding-block: var(--space-12); color: var(--muted); font-size: 13px; border-top: 1px solid var(--border-soft); }
.pagefoot .row-between { flex-wrap: wrap; gap: var(--space-5); }
.pagefoot a { transition: color var(--motion-fast) var(--ease); }
.pagefoot a:hover { color: var(--accent); }
.pagefoot a:focus-visible { outline: none; box-shadow: var(--focus-ring); border-radius: 3px; }

/* ─── Video Player ─── */
.video-wrap {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-soft); background: var(--surface);
  box-shadow: var(--elev-raised);
}
.video-wrap video {
  width: 100%; display: block; aspect-ratio: 16 / 9;
  object-fit: contain; background: var(--fg);
}
.video-caption {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 16px 24px; border-top: 1px solid var(--border-soft);
  background: var(--bg);
}

/* ─── Video Feature (2-column) ─── */
.video-feature {
  display: grid; grid-template-columns: 1fr 280px; gap: 48px; align-items: start;
}
.video-feature-main { min-width: 0; }
.video-feature-side {
  display: flex; flex-direction: column; gap: 28px; padding-top: 12px;
}
.video-side-item {
  display: flex; flex-direction: column; gap: 6px;
}
.video-side-num {
  font-family: var(--font-display); font-size: 36px; font-weight: 600;
  color: var(--accent); line-height: 1; letter-spacing: -0.02em;
}
.video-side-num .num-unit { font-size: 0.45em; opacity: 0.6; margin-left: 2px; }
.video-side-item p { color: var(--muted); font-size: 14px; line-height: 1.6; }
.video-side-quote {
  border-top: 1px solid var(--border-soft); padding-top: 24px; margin-top: 4px;
}
.video-side-quote p {
  font-family: var(--font-display); font-size: 16px; font-weight: 500;
  color: var(--fg); line-height: 1.6; font-style: italic;
}
.video-side-quote span {
  display: block; margin-top: 8px; font-size: 13px; color: var(--muted);
  font-style: normal;
}
@media (max-width: 920px) {
  .video-feature { grid-template-columns: 1fr; gap: 32px; }
  .video-feature-side { flex-direction: row; flex-wrap: wrap; gap: 24px; }
  .video-side-item { flex: 1 1 120px; }
  .video-side-quote { flex: 1 1 100%; border-top: 1px solid var(--border-soft); }
}

/* ─── Report Cards ─── */
.report-grid { align-items: stretch; }
.report-card {
  background: var(--bg); border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg); padding: 32px;
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.report-card:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.report-card h3 { font-size: 19px; margin-bottom: 16px; }
.report-list { margin: 0; padding: 0; list-style: none; }
.report-list li {
  padding: 10px 0; border-bottom: 1px solid var(--border-soft);
  font-size: 15px; color: var(--fg-2); line-height: 1.6;
}
.report-list li:last-child { border-bottom: 0; }
.report-challenges {
  margin-top: 48px; padding: 32px;
  border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  background: var(--bg);
}
.report-challenges h3 { font-size: 19px; margin-bottom: 20px; }
.challenge-item { max-width: 320px; }
.challenge-item .pill { margin-bottom: 8px; }
.challenge-item p { margin: 0; font-size: 15px; color: var(--muted); line-height: 1.6; }

/* ─── Research Accordion Cards ─── */
.research-card {
  border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  background: var(--bg); overflow: hidden;
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.research-card:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.research-card summary { list-style: none; cursor: pointer; }
.research-card summary::-webkit-details-marker { display: none; }
.research-card summary::marker { display: none; content: ''; }
.research-card-head {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: 16px; padding: 28px 32px;
}
.research-card-head h3 { font-size: 19px; margin: 0; line-height: 1.4; }
.research-card-head .chevron {
  flex-shrink: 0; margin-top: 4px; color: var(--muted);
  transition: transform var(--motion-base) var(--ease);
}
.research-card[open] .chevron { transform: rotate(180deg); }
.research-body {
  padding: 0 32px 32px; border-top: 1px solid var(--border-soft);
}
.research-body > * + * { margin-top: 24px; }
.research-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 32px; padding-top: 24px;
}
.research-grid h4 {
  font-family: var(--font-body); font-size: 14px; font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.04em;
  color: var(--muted); margin: 0 0 12px;
}
.research-grid p { margin: 0; font-size: 15px; color: var(--fg-2); line-height: 1.7; }
.research-grid ul { margin: 0; padding: 0; list-style: none; }
.research-grid li {
  position: relative; padding-left: 16px; font-size: 15px;
  color: var(--fg-2); line-height: 1.7; margin-bottom: 6px;
}
.research-grid li::before {
  content: ''; position: absolute; left: 0; top: 10px;
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent); opacity: 0.5;
}
.research-conclusion {
  padding: 20px 24px; background: var(--surface);
  border-radius: var(--radius-md); font-size: 15px;
  color: var(--fg-2); line-height: 1.7;
}
.research-card--open .research-card-head { cursor: default; }

.rct-table { margin-top: 24px; }

.highlight-stat { text-align: center; padding: 24px 0; }
.highlight-stat .stat-num { margin-bottom: 8px; }

@media (max-width: 920px) {
  .research-grid { grid-template-columns: 1fr; }
  .research-card-head { padding: 20px 20px; }
  .research-body { padding: 0 20px 24px; }
  .report-card { padding: 24px; }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.hero-center > * { animation: fadeUp 0.8s var(--ease) both; }
.hero-center > *:nth-child(2) { animation-delay: 0.1s; }
.hero-center > *:nth-child(3) { animation-delay: 0.2s; }
.hero-center > *:nth-child(4) { animation-delay: 0.3s; }
.hero-center > *:nth-child(5) { animation-delay: 0.4s; }

/* ─── Showcase Gallery ─── */
.showcase-gallery {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.showcase-item {
  border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border-soft);
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.showcase-item.lightbox-trigger {
  display: block; width: 100%; padding: 0; margin: 0;
  background: transparent; cursor: zoom-in;
  font: inherit; color: inherit; text-align: left;
}
.showcase-item.lightbox-trigger:focus-visible {
  outline: none; box-shadow: var(--focus-ring);
}
.showcase-item:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.showcase-item img {
  width: 100%; height: 280px; object-fit: cover; display: block;
  pointer-events: none;
}

/* ─── Lightbox (点击查看原图) ─── */
.lightbox {
  position: fixed; inset: 0; z-index: 9999;
  background: color-mix(in oklab, var(--fg) 92%, transparent);
  display: flex; align-items: center; justify-content: center;
  padding: 48px 72px;
  animation: lightbox-fade var(--motion-base) var(--ease-standard);
}
.lightbox[hidden] { display: none; }
#cert-lightbox { display: none; }
#cert-lightbox.open { display: flex; }
@keyframes lightbox-fade { from { opacity: 0; } to { opacity: 1; } }
.lightbox-stage {
  margin: 0; max-width: 100%; max-height: 100%;
  display: flex; flex-direction: column; align-items: center; gap: 12px;
}
.lightbox-stage img {
  max-width: 100%; max-height: calc(100vh - 160px);
  object-fit: contain; border-radius: var(--radius-md);
  box-shadow: 0 24px 80px rgba(0,0,0,0.45);
}
.lightbox-caption {
  color: var(--fg-on-dark); font-size: var(--fs-sm);
  letter-spacing: 0.02em;
}
.lightbox-close, .lightbox-nav {
  position: absolute; background: transparent; border: 0;
  color: var(--fg-on-dark); cursor: pointer;
  font-family: var(--font-display); padding: 0;
  transition: opacity var(--motion-fast) var(--ease);
}
.lightbox-close:hover, .lightbox-nav:hover { opacity: 0.6; }
.lightbox-close {
  top: 20px; right: 28px;
  font-size: 44px; line-height: 1; font-weight: 300;
}
.lightbox-nav {
  top: 50%; transform: translateY(-50%);
  font-size: 64px; line-height: 1; font-weight: 300;
  width: 56px; height: 80px;
}
.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }

/* ─── Pricing Cards ─── */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pricing-grid > :nth-child(4) { grid-column: 1 / 2; }
.pricing-grid > :nth-child(5) { grid-column: 2 / 4; }
.pricing-card {
  background: var(--bg); border: 1px solid var(--border-soft);
  border-radius: var(--radius-lg); padding: 32px;
  display: flex; flex-direction: column; justify-content: space-between;
  gap: 24px;
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.pricing-card:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.pricing-card--featured {
  border-color: var(--accent);
  background: color-mix(in oklch, var(--accent) 4%, var(--bg));
}
.pricing-card--trial {
  border-style: dashed; border-color: var(--accent);
}
.pricing-head h3 { margin: 0; font-size: 21px; }
.pricing-amount { display: flex; flex-direction: column; }

/* ─── Service Grid ─── */
.service-grid {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.service-item {
  display: flex; gap: 20px; align-items: flex-start;
  padding: 28px; background: var(--bg);
  border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.service-item:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.service-num {
  font-family: var(--font-display); font-size: 28px; font-weight: 600;
  color: var(--accent); line-height: 1; flex-shrink: 0;
  opacity: 0.6;
}

/* ─── Tech Summary ─── */
.tech-summary {
  padding: 32px; background: var(--bg);
  border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
}
.tech-summary h3 { font-size: 19px; margin: 0; }

/* ─── Video Grid 3 ─── */
.video-grid-3 {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.video-card {
  background: var(--bg); border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border-soft);
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.video-card:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.video-wrap {
  position: relative; aspect-ratio: 16 / 9;
  background: var(--surface);
}
.video-wrap video {
  width: 100%; height: 100%; object-fit: cover; display: block;
}
.video-card-info {
  padding: 24px;
}
.video-card-info h3 {
  font-size: 18px; font-weight: 600; margin: 0 0 8px;
  font-family: var(--font-display);
}
.video-card-info p {
  font-size: 14px; color: var(--muted); line-height: 1.5; margin: 0;
}

/* ─── Stats Row ─── */
.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 32px; text-align: center;
}
.stat-num {
  font-family: var(--font-display); font-size: clamp(40px, 5vw, 56px);
  font-weight: 600; color: var(--fg); line-height: 1;
  display: block;
}
.stat-unit {
  font-size: 0.5em; font-weight: 400; color: var(--muted);
  margin-left: 2px;
}
.stat-label {
  font-size: 15px; font-weight: 600; color: var(--fg);
  margin: 12px 0 6px;
}
.stat-desc {
  font-size: 13px; color: var(--muted); line-height: 1.45; margin: 0;
}

/* ─── Service Card (achievements variant) ─── */
.service-card {
  padding: 28px; background: var(--bg);
  border: 1px solid var(--border-soft); border-radius: var(--radius-lg);
  transition: border-color var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease);
}
.service-card:hover { border-color: var(--border); box-shadow: var(--elev-raised); }
.service-card .service-num {
  font-family: var(--font-display); font-size: 28px; font-weight: 600;
  color: var(--accent); line-height: 1; display: block; margin-bottom: 12px;
  opacity: 0.6;
}
.service-card h3 { font-size: 17px; font-weight: 600; margin: 0 0 8px; }
.service-card p { font-size: 14px; color: var(--muted); line-height: 1.5; margin: 0; }

@media (max-width: 920px) {
  .showcase-gallery { grid-template-columns: 1fr; }
  .showcase-item img { height: 220px; }
  .lightbox { padding: 24px 16px; }
  .lightbox-close { font-size: 36px; top: 12px; right: 16px; }
  .lightbox-nav { font-size: 44px; width: 40px; }
  .lightbox-prev { left: 4px; }
  .lightbox-next { right: 4px; }
  .lightbox-stage img { max-height: calc(100vh - 120px); }
  .pricing-grid { grid-template-columns: 1fr; }
  .pricing-grid > :nth-child(4),
  .pricing-grid > :nth-child(5) { grid-column: auto; }
  .service-grid { grid-template-columns: 1fr; }
  .video-grid-3 { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}
@media (max-width: 640px) {
  .ds-table { font-size: 13px; }
  .ds-table th, .ds-table td { padding: 10px 8px; }
}

/* ─── Scroll Reveal Motion System ─── */
@keyframes revealUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes revealScale {
  from { opacity: 0; transform: scale(0.96); }
  to   { opacity: 1; transform: scale(1); }
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  will-change: opacity, transform;
}
.reveal.revealed {
  animation: revealUp 0.7s var(--ease) forwards;
}

.reveal-stagger > .reveal:nth-child(1) { animation-delay: 0s; }
.reveal-stagger > .reveal:nth-child(2) { animation-delay: 0.08s; }
.reveal-stagger > .reveal:nth-child(3) { animation-delay: 0.16s; }
.reveal-stagger > .reveal:nth-child(4) { animation-delay: 0.24s; }
.reveal-stagger > .reveal:nth-child(5) { animation-delay: 0.32s; }
.reveal-stagger > .reveal:nth-child(6) { animation-delay: 0.40s; }

.reveal-scale.revealed {
  animation-name: revealScale;
  animation-duration: 0.6s;
}

/* ─── Nav Scroll Shadow ─── */
.topnav {
  transition: box-shadow var(--motion-base) var(--ease);
}
.topnav.nav-scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

/* ─── Counter Number ─── */
.counter-num {
  font-variant-numeric: tabular-nums;
}

/* ─── Reduced Motion ─── */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; will-change: auto; }
  .reveal.revealed { animation: none; opacity: 1; transform: none; }
  .hero-center > * { animation: none !important; opacity: 1 !important; transform: none !important; }
  .hero::after, .brand-hero::after { background: color-mix(in oklch, var(--bg) 55%, transparent); }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}