:root {
  /* 能源行业配色：深能源蓝 + 低碳绿（取自企业 PPT 主题色 4874CB / 75BD42 的加深版） */
  --brand: #0c5f8e;
  --brand-dark: #094b72;
  --brand-soft: #e9f3f9;
  --accent: #3f9e4d;
  --accent-dark: #2f7d3c;
  --accent-soft: #edf7ee;
  --ink: #0a1f2c;
  --text: #24384a;
  --muted: #5c7080;
  --line: #dfe8e9;
  --bg: #ffffff;
  --bg-soft: #f4f8f7;
  --radius: 12px;
  --radius-lg: 18px;
  --maxw: 1200px;
  --header-h: 68px;
  --grad-energy: linear-gradient(135deg, #082238 0%, #0a3d50 55%, #0d5140 100%);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 600; color: var(--ink); }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: background .18s, border-color .18s, color .18s, box-shadow .18s;
}
.btn-primary { background: var(--brand); color: #fff; box-shadow: 0 6px 18px rgba(12,95,142,.22); }
.btn-primary:hover { background: var(--brand-dark); box-shadow: 0 8px 22px rgba(9,75,114,.28); }
.btn-ghost { border-color: rgba(255,255,255,.35); color: #fff; }
.btn-ghost:hover { border-color: #fff; background: rgba(255,255,255,.08); }
.btn-outline { border-color: var(--line); color: var(--text); background: #fff; }
.btn-outline:hover { border-color: var(--accent); color: var(--accent-dark); }
.btn-sm { height: 36px; padding: 0 16px; font-size: 14px; }

/* ---------- 头部 ---------- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { height: var(--header-h); display: flex; align-items: center; gap: 32px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 17px; font-weight: 600; color: var(--ink); white-space: nowrap; }
.logo-mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: linear-gradient(135deg, var(--brand), var(--accent)); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 600;
}
.logo img { width: 26px; height: 26px; border-radius: 6px; object-fit: contain; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  padding: 8px 14px; border-radius: 8px; font-size: 15px; color: var(--muted);
  transition: color .18s, background .18s;
}
.nav a:hover { color: var(--brand-dark); background: var(--brand-soft); }
.nav a.active { color: var(--brand); font-weight: 500; }
.header-cta { display: flex; align-items: center; }
.nav-toggle { display: none; margin-left: auto; width: 40px; height: 40px; border: 1px solid var(--line); background: #fff; border-radius: 8px; cursor: pointer; }
.nav-toggle span { display: block; width: 18px; height: 1.5px; background: var(--text); margin: 4px auto; }

/* ---------- 首屏全屏轮播 ---------- */
.hero-carousel { position: relative; height: 100vh; min-height: 620px; overflow: hidden; background: #04101d; color: #fff; }
.hc-slide { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: opacity 1.1s ease, visibility 1.1s; }
.hc-slide.is-active { opacity: 1; visibility: visible; z-index: 2; }
.hc-bg { position: absolute; inset: 0; background-size: cover; background-position: center; transform: scale(1.06); }
/* 科技感叠加层：深蓝渐变 + 网格 + 光晕 */
.hc-overlay { position: absolute; inset: 0; background: linear-gradient(100deg, rgba(4,16,31,.93) 0%, rgba(6,24,44,.74) 44%, rgba(7,38,58,.32) 100%); }
.hc-tech {
  position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(90,200,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(90,200,255,.06) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(105deg, rgba(0,0,0,.9), transparent 64%);
  mask-image: linear-gradient(105deg, rgba(0,0,0,.9), transparent 64%);
}
.hc-glow {
  position: absolute; width: 640px; height: 640px; border-radius: 50%; right: -180px; bottom: -280px; pointer-events: none;
  background: radial-gradient(circle, rgba(63,158,77,.32) 0%, transparent 65%);
}
.hc-caption { position: relative; height: 100%; display: flex; flex-direction: column; justify-content: center; z-index: 3; }
.hc-eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; letter-spacing: .16em; color: #7fd8a2; margin-bottom: 24px; }
.hc-eyebrow::before { content: ""; width: 34px; height: 2px; background: linear-gradient(90deg, #7fd8a2, transparent); }
.hc-caption h1 { color: #fff; font-size: 52px; line-height: 1.2; letter-spacing: -.5px; margin-bottom: 24px; max-width: 760px; text-shadow: 0 4px 26px rgba(0,0,0,.4); }
.hc-caption h1 em {
  font-style: normal;
  background: linear-gradient(92deg, #8ee08f, #4fd6c0 55%, #6db7ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hc-caption p { color: #c2d6e4; font-size: 18px; line-height: 1.9; max-width: 580px; margin-bottom: 38px; }
.hc-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hc-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 42px; }
.hc-tags span {
  font-size: 13px; color: #9fc6d8; border: 1px solid rgba(140,200,230,.28);
  background: rgba(10,30,50,.35); backdrop-filter: blur(4px); border-radius: 999px; padding: 5px 14px;
}
/* 圆点指示（轮播图胶囊指示条，置于页面底部） */
.hc-dots { position: absolute; left: 0; right: 0; bottom: 28px; z-index: 10; display: flex; justify-content: center; gap: 12px; }
.hc-dots button { width: 34px; height: 4px; border-radius: 2px; border: 0; background: rgba(255,255,255,.28); cursor: pointer; padding: 0; transition: background .25s, width .25s; }
.hc-dots button.on { background: linear-gradient(90deg, #7fd8a2, #4fd6c0); width: 52px; }
/* 透明页头（首页：固定悬浮于轮播之上，向下滚动后切换为实底白底） */
.header-overlay {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  background: linear-gradient(180deg, rgba(4,16,30,.72) 0%, rgba(4,16,30,.42) 55%, rgba(4,16,30,0) 100%);
  border-bottom: 1px solid rgba(255,255,255,.08);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  transition: background .25s ease, border-color .25s ease;
}
.header-overlay .logo { color: #fff; transition: color .25s ease; }
.header-overlay .nav a { color: rgba(255,255,255,.85); transition: color .18s, background .18s; }
.header-overlay .nav a:hover { color: #fff; background: rgba(255,255,255,.10); }
.header-overlay .nav a.active { color: #7fd8a2; transition: color .18s; }
.header-overlay .nav.open { background: rgba(6,20,36,.96); border-bottom: 1px solid rgba(255,255,255,.12); }
/* 向下滚动后的实底状态（白底深字，与内页一致） */
.header-overlay.header-solid {
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-overlay.header-solid .logo { color: var(--ink); }
.header-overlay.header-solid .nav a { color: var(--muted); }
.header-overlay.header-solid .nav a:hover { color: var(--brand-dark); background: var(--brand-soft); }
.header-overlay.header-solid .nav a.active { color: var(--brand); }
.header-overlay.header-solid .nav.open { background: #fff; border-bottom: 1px solid var(--line); }

/* ---------- 数据条（深色科技面板） ---------- */
.stats { background: linear-gradient(120deg, #06192a 0%, #082a3e 55%, #062b1e 100%); position: relative; overflow: hidden; }
.stats::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(90,200,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(90,200,255,.05) 1px, transparent 1px);
  background-size: 48px 48px;
}
.stats::after {
  content: ""; position: absolute; width: 480px; height: 480px; border-radius: 50%; left: 50%; top: -260px; transform: translateX(-50%); pointer-events: none;
  background: radial-gradient(circle, rgba(79,214,192,.16) 0%, transparent 65%);
}
.stats-inner { position: relative; display: flex; flex-direction: column; justify-content: center; min-height: 100vh; padding: 64px 0; }
.stats-head { text-align: center; margin-bottom: 34px; }
.stats-head h2 { color: #fff; font-size: 32px; margin-bottom: 10px; }
.stats-head h2 em {
  font-style: normal;
  background: linear-gradient(92deg, #4fd6c0, #8ee08f);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stats-head p { color: #8aa4b0; font-size: 15px; max-width: 560px; margin: 0 auto; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat { padding: 34px 16px; text-align: center; border-right: 1px solid rgba(255,255,255,.08); position: relative; }
.stat:last-child { border-right: 0; }
.stat b {
  display: block; font-size: 34px; font-weight: 700; line-height: 1.2; margin-bottom: 6px;
  background: linear-gradient(92deg, #4fd6c0, #8ee08f);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat:nth-child(2n) b { background: linear-gradient(92deg, #8ee08f, #6db7ff); -webkit-background-clip: text; background-clip: text; }
.stat span { font-size: 13px; color: #8aa4b0; letter-spacing: .05em; }
.stat::after {
  content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%);
  width: 0; height: 2px; background: linear-gradient(90deg, #4fd6c0, #8ee08f); transition: width .3s;
}
.stat:hover::after { width: 60%; }
/* 资质荣誉 */
.stats-honors { margin-top: 40px; text-align: center; }
.honors-label {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 13px; color: #7fd8a2; letter-spacing: .08em;
  background: rgba(79,214,192,.08); border: 1px solid rgba(79,214,192,.22);
  border-radius: 999px; padding: 5px 14px; margin-bottom: 18px;
}
.honors-tags { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; max-width: 880px; margin: 0 auto; }
.honors-tags span {
  font-size: 13px; color: #c7d8de;
  background: rgba(255,255,255,.045); border: 1px solid rgba(255,255,255,.12);
  border-radius: 999px; padding: 6px 14px;
  backdrop-filter: blur(4px);
  transition: background .2s, border-color .2s, color .2s;
}
.honors-tags span:hover { background: rgba(79,214,192,.14); border-color: rgba(79,214,192,.4); color: #dff6ea; }

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-soft { background: var(--bg-soft); }
.section-head { max-width: 680px; margin-bottom: 44px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { font-size: 30px; margin-bottom: 12px; letter-spacing: -.3px; }
.section-head.center h2::after {
  content: ""; display: block; width: 56px; height: 3px; border-radius: 2px; margin: 16px auto 0;
  background: linear-gradient(90deg, var(--accent), #4fd6c0);
}
.section-head p { color: var(--muted); font-size: 16px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; font-weight: 600; color: var(--accent-dark);
  letter-spacing: .22em; margin-bottom: 14px;
}
.eyebrow::before, .eyebrow::after { content: ""; width: 22px; height: 1px; background: linear-gradient(90deg, transparent, var(--accent)); }
.eyebrow::after { background: linear-gradient(90deg, var(--accent), transparent); }
.eyebrow:not(.eyebrow-plain)::before { background: linear-gradient(90deg, transparent, var(--accent)); }

/* ---------- 卡片 ---------- */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: border-color .18s, box-shadow .18s, transform .18s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), #4fd6c0, transparent);
  transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.card:hover { border-color: #b9dfc2; box-shadow: 0 14px 36px rgba(10,52,44,.10); transform: translateY(-4px); }
.card:hover::before { transform: scaleX(1); }
.card-icon {
  width: 46px; height: 46px; border-radius: 12px; background: var(--brand-soft);
  display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.card-icon svg { width: 24px; height: 24px; stroke: var(--brand); fill: none; stroke-width: 1.7; }
.card h3 { font-size: 18px; margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 15px; }
.card-link { display: inline-block; margin-top: 16px; font-size: 14px; color: var(--brand); font-weight: 500; }
.card:hover .card-link { color: var(--accent-dark); }

/* ---------- 产品 ---------- */
.product-card { overflow: hidden; padding: 0; display: flex; flex-direction: column; }
.product-cover { height: 168px; background: var(--brand-soft); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.product-cover img { width: 100%; height: 100%; object-fit: cover; }
.product-cover svg { width: 76px; height: 76px; }
.product-body { padding: 24px 26px 28px; flex: 1; }
.product-body h3 { font-size: 19px; margin-bottom: 8px; }

/* ---------- 新闻 ---------- */
.news-card { overflow: hidden; padding: 0; display: flex; flex-direction: column; }
.news-card .thumb { height: 190px; background: var(--brand-soft); display: flex; align-items: center; justify-content: center; overflow: hidden; }
.news-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-card .thumb svg { width: 60px; height: 60px; stroke: #8fb8cd; }
.news-body { padding: 22px 26px 26px; display: flex; flex-direction: column; flex: 1; }
.news-meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted); margin-bottom: 10px; }
.tag { background: var(--accent-soft); color: var(--accent-dark); border-radius: 6px; padding: 2px 9px; font-size: 12px; }
.news-body h3 { font-size: 18px; margin-bottom: 8px; line-height: 1.45; }
.news-body p { color: var(--muted); font-size: 15px; flex: 1; }
.news-foot { margin-top: 18px; font-size: 14px; color: var(--brand); }
.news-card:hover .news-foot { color: var(--accent-dark); }

/* ---------- 关于页 ---------- */
.timeline { position: relative; padding-left: 28px; }
.timeline::before { content: ""; position: absolute; left: 5px; top: 8px; bottom: 8px; width: 2px; background: linear-gradient(180deg, var(--brand), var(--accent)); }
.timeline li { position: relative; padding-bottom: 30px; }
.timeline li::before {
  content: ""; position: absolute; left: -28px; top: 8px; width: 12px; height: 12px;
  border-radius: 50%; background: #fff; border: 2px solid var(--accent);
}
.timeline b { color: var(--brand); font-size: 15px; }
.timeline h4 { font-size: 17px; margin: 4px 0 6px; }
.timeline p { color: var(--muted); font-size: 15px; }

.honor-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.honor-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; color: var(--text); padding: 14px 16px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); margin-top: 9px; flex: none; }

.prose p { margin-bottom: 18px; font-size: 16px; color: var(--text); }
.prose p:last-child { margin-bottom: 0; }

/* ---------- 详情页 ---------- */
.page-head { background: var(--grad-energy); color: #fff; padding: 64px 0 60px; position: relative; overflow: hidden; }
.page-head::after {
  content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%;
  right: -120px; bottom: -220px; pointer-events: none;
  background: radial-gradient(circle, rgba(120,190,80,.22) 0%, transparent 65%);
}
.page-head h1 { color: #fff; font-size: 34px; margin-bottom: 10px; }
.page-head p { color: #a8c6d2; font-size: 16px; max-width: 640px; }
.breadcrumb { font-size: 14px; color: #a8c6d2; margin-bottom: 14px; }
.breadcrumb a:hover { color: #fff; }

.detail-layout { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: start; }
.article-body { font-size: 16px; }
.article-body p { margin-bottom: 20px; }
.side-card { border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 24px; background: var(--bg-soft); }
.side-card h4 { font-size: 16px; margin-bottom: 14px; }
.side-list li { padding: 12px 0; border-bottom: 1px dashed var(--line); font-size: 15px; }
.side-list li:last-child { border-bottom: 0; padding-bottom: 0; }
.side-list a:hover { color: var(--brand); }

/* ---------- 联系页 ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 420px; gap: 56px; align-items: start; }
.info-list li { display: flex; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
.info-list li:last-child { border-bottom: 0; }
.info-label { font-size: 13px; color: var(--muted); width: 76px; flex: none; }
.info-value { font-size: 16px; color: var(--text); }

.form-card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px; }
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 14px; color: var(--text); margin-bottom: 7px; }
.field input, .field textarea, .field select {
  width: 100%; border: 1px solid var(--line); border-radius: 8px; padding: 11px 14px;
  font-size: 15px; font-family: inherit; color: var(--text); background: #fff;
  transition: border-color .18s, box-shadow .18s;
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(63,158,77,.14);
}
.field textarea { min-height: 128px; resize: vertical; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 12px; }
.alert { border-radius: 8px; padding: 12px 16px; font-size: 15px; margin-bottom: 20px; }
.alert-ok { background: #ecfdf5; color: #047857; border: 1px solid #a7f3d0; }

/* ---------- CTA ---------- */
.cta {
  background: linear-gradient(120deg, #06202f 0%, #0a3a2c 60%, #0d5140 100%);
  color: #fff; padding: 76px 0; text-align: center; position: relative; overflow: hidden;
}
.cta::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(90,200,255,.05) 1px, transparent 1px), linear-gradient(90deg, rgba(90,200,255,.05) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.9), transparent 72%);
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,.9), transparent 72%);
}
.cta::after {
  content: ""; position: absolute; width: 560px; height: 560px; border-radius: 50%;
  left: 50%; bottom: -420px; transform: translateX(-50%); pointer-events: none;
  background: radial-gradient(circle, rgba(79,214,192,.28) 0%, transparent 65%);
}
.cta h2 { color: #fff; font-size: 30px; margin-bottom: 12px; position: relative; }
.cta p { color: #b7d3c2; margin-bottom: 28px; position: relative; }
.cta .btn { position: relative; }

/* ---------- 深色科技区块 + 玻璃卡片 ---------- */
.section-tech {
  background: linear-gradient(160deg, #061a2c 0%, #082a3f 55%, #06281e 100%);
  color: #fff; position: relative; overflow: hidden;
}
.section-tech::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(rgba(90,200,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(90,200,255,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(115deg, rgba(0,0,0,.85), transparent 62%);
  mask-image: linear-gradient(115deg, rgba(0,0,0,.85), transparent 62%);
}
.section-tech::after {
  content: ""; position: absolute; width: 560px; height: 560px; border-radius: 50%;
  right: -200px; top: -260px; pointer-events: none;
  background: radial-gradient(circle, rgba(63,158,77,.22) 0%, transparent 65%);
}
.section-tech .wrap { position: relative; z-index: 1; }
.section-tech .section-head h2 { color: #fff; }
.section-tech .section-head h2::after { background: linear-gradient(90deg, #4fd6c0, #8ee08f); }
.section-tech .section-head p { color: #93b3c2; }
.glass-card {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: var(--radius-lg);
  padding: 30px;
  backdrop-filter: blur(6px);
  transition: border-color .2s, background .2s, transform .2s, box-shadow .2s;
}
.glass-card:hover {
  border-color: rgba(127,216,162,.5);
  background: rgba(255,255,255,.08);
  transform: translateY(-4px);
  box-shadow: 0 18px 42px rgba(0,0,0,.35);
}
.glass-icon {
  width: 48px; height: 48px; border-radius: 12px; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(79,214,192,.2), rgba(142,224,143,.14));
  border: 1px solid rgba(127,216,162,.4);
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 18px rgba(79,214,192,.18);
}
.glass-icon svg { width: 24px; height: 24px; stroke: #7fd8a2; fill: none; stroke-width: 1.7; }
.glass-card h3 { color: #fff; font-size: 18px; margin-bottom: 10px; }
.glass-card p { color: #9db8c6; font-size: 15px; }

/* ---------- 页脚 ---------- */
.footer { background: #071a24; color: #8aa4b0; padding: 60px 0 26px; font-size: 14px; }
.footer-top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 16px; font-weight: 500; }
.footer li { padding: 6px 0; }
.footer a:hover { color: #9fd0a8; }
.footer-brand .logo { color: #fff; margin-bottom: 14px; }
.footer-brand .logo img { width: 26px; height: 26px; border-radius: 6px; }
.footer-brand p { max-width: 320px; line-height: 1.8; }
.footer-bottom { padding-top: 22px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13px; }
.icp-link { color: inherit; }
.icp-link:hover { color: #9fd0a8; }

/* ---------- 空状态 ---------- */
.empty { text-align: center; padding: 70px 20px; color: var(--muted); border: 1px dashed var(--line); border-radius: var(--radius-lg); }

/* ---------- 响应式 ---------- */
@media (max-width: 980px) {
  .hc-caption h1 { font-size: 40px; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .detail-layout { grid-template-columns: 1fr; gap: 36px; }
  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .footer-top { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid .stat:nth-child(2) { border-right: 0; }
  .stats-grid .stat:nth-child(1), .stats-grid .stat:nth-child(2) { border-bottom: 1px solid rgba(255,255,255,.08); }
}

@media (max-width: 720px) {
  .nav {
    display: none; position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0; background: #fff; border-bottom: 1px solid var(--line);
    padding: 10px 16px 16px; margin-left: 0;
  }
  .nav.open { display: flex; }
  .nav a { padding: 12px 10px; font-size: 16px; border-radius: 6px; }
  .nav-toggle { display: block; }
  .header-cta { display: none; }
  .hero-carousel { height: 100svh; min-height: 560px; }
  .hc-caption h1 { font-size: 32px; }
  .hc-caption p { font-size: 16px; }
  .hc-tags { display: none; }
  .hc-dots { bottom: 26px; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 24px; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .honor-list { grid-template-columns: 1fr; }
  .page-head { padding: 44px 0 40px; }
  .page-head h1 { font-size: 26px; }
  .footer-top { grid-template-columns: 1fr; }
  .wrap { padding: 0 18px; }
  .card { padding: 24px; }
}

/* ---------- 首页整屏翻页 ---------- */
/* 滚动由 main.js 接管（滚轮/键盘/指示点 + 自定义缓动），关闭原生 scroll-snap 以免与动画互相争抢 */
.flip-page {
  min-height: 100vh;
  display: flex; flex-direction: column;
}
.flip-page > .wrap { margin: auto; } /* 溢出安全垂直居中 */
/* 数据页整屏放大 */
body.page-flip .stats { min-height: 100vh; }
body.page-flip .stat { padding: 60px 16px; }
body.page-flip .stat b { font-size: 46px; }
body.page-flip .stat span { font-size: 15px; }
/* 最后一屏：CTA 占满剩余高度 + 页脚 */
.flip-last { justify-content: flex-start; }
.flip-last .cta { flex: 1; display: flex; align-items: center; justify-content: center; }
/* 翻页进场动画（JS 就绪后才启用，避免无 JS 时内容不可见） */
body.page-flip.flip-ready .flip-page > .wrap {
  opacity: 0; transform: translateY(44px) scale(1.045);
  transform-origin: center;
  transition: opacity .9s cubic-bezier(.22, 1, .36, 1), transform .9s cubic-bezier(.22, 1, .36, 1);
  will-change: transform, opacity;
}
body.page-flip.flip-ready .flip-page.in > .wrap { opacity: 1; transform: none; }
/* 滑动切页动效：页面内容分块依次上滑进入（stagger） */
body.page-flip.flip-ready .flip-page .section-head,
body.page-flip.flip-ready .flip-page .stats-head,
body.page-flip.flip-ready .flip-page .grid-3,
body.page-flip.flip-ready .flip-page .grid-4,
body.page-flip.flip-ready .flip-page .stats-grid,
body.page-flip.flip-ready .flip-page .stats-honors,
body.page-flip.flip-ready .flip-page .cta > .wrap,
body.page-flip.flip-ready .flip-page .footer-top {
  opacity: 0; transform: translateY(48px);
  transition: opacity .82s cubic-bezier(.22, 1, .36, 1), transform .82s cubic-bezier(.22, 1, .36, 1);
  will-change: transform, opacity;
}
body.page-flip.flip-ready .flip-page.in .section-head,
body.page-flip.flip-ready .flip-page.in .stats-head,
body.page-flip.flip-ready .flip-page.in .grid-3,
body.page-flip.flip-ready .flip-page.in .grid-4,
body.page-flip.flip-ready .flip-page.in .stats-grid,
body.page-flip.flip-ready .flip-page.in .stats-honors,
body.page-flip.flip-ready .flip-page.in .cta > .wrap,
body.page-flip.flip-ready .flip-page.in .footer-top { opacity: 1; transform: none; }
/* 依次错落的延迟 */
body.page-flip.flip-ready .flip-page.in .section-head,
body.page-flip.flip-ready .flip-page.in .stats-head { transition-delay: .08s; }
body.page-flip.flip-ready .flip-page.in .grid-3,
body.page-flip.flip-ready .flip-page.in .grid-4,
body.page-flip.flip-ready .flip-page.in .stats-grid { transition-delay: .18s; }
body.page-flip.flip-ready .flip-page.in .stats-honors { transition-delay: .3s; }
body.page-flip.flip-ready .flip-page.in .cta > .wrap { transition-delay: .12s; }
body.page-flip.flip-ready .flip-page.in .footer-top { transition-delay: .24s; }
/* 右侧翻页指示条（竖长条） */
.flip-nav {
  position: fixed; right: 22px; top: 50%; transform: translateY(-50%); z-index: 90;
  display: flex; flex-direction: column; gap: 14px;
}
.flip-nav button {
  width: 9px; height: 9px; padding: 0; border-radius: 50%; cursor: pointer;
  border: 1px solid rgba(255,255,255,.75); background: rgba(8,26,42,.30);
  box-shadow: 0 0 0 1px rgba(8,26,42,.18);
  transition: transform .25s, background .25s, box-shadow .25s, height .25s, border-radius .25s;
}
.flip-nav button:hover { transform: scale(1.3); }
.flip-nav button.on {
  background: #4fd6c0; border-color: #4fd6c0; box-shadow: 0 0 12px rgba(79,214,192,.85);
  height: 22px; border-radius: 6px; transform: scale(1.15);
}
/* 移动端保持自然滚动 */
@media (max-width: 720px) {
  .flip-page { min-height: 0; display: block; }
  body.page-flip .stats { min-height: 0; }
  body.page-flip .stat { padding: 34px 16px; }
  body.page-flip .stat b { font-size: 34px; }
  .flip-nav { display: none; }
  /* 移动端关闭分块滑入与整屏淡入，保持内容直接可见（否则长区块因 IntersectionObserver 阈值无法触发而一直空白） */
  body.page-flip.flip-ready .flip-page > .wrap,
  body.page-flip.flip-ready .flip-page .section-head,
  body.page-flip.flip-ready .flip-page .stats-head,
  body.page-flip.flip-ready .flip-page .grid-3,
  body.page-flip.flip-ready .flip-page .grid-4,
  body.page-flip.flip-ready .flip-page .stats-grid,
  body.page-flip.flip-ready .flip-page .stats-honors,
  body.page-flip.flip-ready .flip-page .cta > .wrap,
  body.page-flip.flip-ready .flip-page .footer-top {
    opacity: 1; transform: none; transition: none;
  }
}

/* ---------- 翻页屏高度适配（桌面端低视口，避免屏内滚动） ---------- */
@media (min-width: 721px) and (max-height: 960px) {
  body.page-flip .section { padding: 56px 0; }
  body.page-flip .section-head { margin-bottom: 26px; }
  body.page-flip .section-head h2 { font-size: 26px; margin-bottom: 8px; }
  body.page-flip .section-head p { font-size: 15px; }
  body.page-flip .eyebrow { margin-bottom: 10px; }
  body.page-flip .grid-3, body.page-flip .grid-4 { gap: 18px; }
  body.page-flip .product-cover { height: 126px; }
  body.page-flip .product-body { padding: 16px 20px 18px; }
  body.page-flip .product-body h3 { font-size: 17px; margin-bottom: 6px; }
  body.page-flip .product-body p { font-size: 14px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  body.page-flip .card-link { margin-top: 10px; }
  body.page-flip .news-card .thumb { height: 136px; }
  body.page-flip .news-body { padding: 16px 20px 18px; }
  body.page-flip .news-body h3 { font-size: 16px; margin-bottom: 6px; }
  body.page-flip .news-body p { font-size: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  body.page-flip .news-foot { margin-top: 10px; }
  body.page-flip .stat { padding: 44px 16px; }
  body.page-flip .stat b { font-size: 38px; }
  body.page-flip .stats-inner { padding: 48px 0; }
  body.page-flip .stats-head { margin-bottom: 22px; }
  body.page-flip .stats-head h2 { font-size: 28px; }
  body.page-flip .stats-head p { font-size: 14px; }
  body.page-flip .stats-honors { margin-top: 26px; }
}
@media (min-width: 721px) and (max-height: 800px) {
  body.page-flip .section { padding: 40px 0; }
  body.page-flip .section-head { margin-bottom: 18px; }
  body.page-flip .section-head h2 { font-size: 23px; margin-bottom: 6px; }
  body.page-flip .product-cover { height: 100px; }
  body.page-flip .product-body { padding: 12px 18px 14px; }
  body.page-flip .product-body h3 { font-size: 16px; margin-bottom: 4px; }
  body.page-flip .card-link { margin-top: 6px; font-size: 13px; }
  body.page-flip .news-card .thumb { height: 108px; }
  body.page-flip .news-body { padding: 12px 18px 14px; }
  body.page-flip .news-body h3 { font-size: 15px; margin-bottom: 4px; }
  body.page-flip .news-meta { margin-bottom: 6px; font-size: 12px; }
  body.page-flip .news-foot { margin-top: 6px; font-size: 13px; }
  body.page-flip .stat { padding: 32px 12px; }
  body.page-flip .stat b { font-size: 32px; }
  body.page-flip .stat span { font-size: 13px; }
  body.page-flip .stats-inner { padding: 34px 0; }
  body.page-flip .stats-head { margin-bottom: 14px; }
  body.page-flip .stats-head h2 { font-size: 24px; margin-bottom: 6px; }
  body.page-flip .stats-head p { font-size: 13px; }
  body.page-flip .stats-honors { margin-top: 14px; }
  body.page-flip .honors-tags { gap: 7px; }
  body.page-flip .honors-tags span { font-size: 12px; padding: 4px 11px; }
  body.page-flip .honors-label { margin-bottom: 12px; font-size: 12px; }
  body.page-flip .cta { padding: 44px 0; }
  body.page-flip .cta h2 { font-size: 26px; }
  body.page-flip .footer { padding: 40px 0 20px; }
  body.page-flip .footer-top { padding-bottom: 28px; }
}
@media (min-width: 721px) and (max-height: 690px) {
  body.page-flip .section { padding: 28px 0; }
  body.page-flip .eyebrow { display: none; }
  body.page-flip .product-cover { height: 80px; }
  body.page-flip .product-body p { -webkit-line-clamp: 1; }
  body.page-flip .news-card .thumb { height: 84px; }
  body.page-flip .news-body p { -webkit-line-clamp: 1; }
  body.page-flip .stats-head p { display: none; }
  body.page-flip .stats-inner { padding: 26px 0; }
  body.page-flip .stats-honors { margin-top: 10px; }
  body.page-flip .honors-label { margin-bottom: 8px; }
}