/* BYD 深度分析 - 主样式表 */

:root {
  --primary: #0A1A2F;
  --primary-2: #1C2541;
  --secondary: #4A5A75;
  --accent: #D90429;
  --accent-2: #FF6B35;
  --light: #E8F1F8;
  --light-2: #F5F7FA;
  --bg: #FFFFFF;
  --bg-alt: #FAFBFC;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-400: #9CA3AF;
  --gray-600: #4B5563;
  --green: #0E7C42;
  --green-light: #DCFCE7;
  --red: #B91C1C;
  --red-light: #FEE2E2;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 12px rgba(0,0,0,0.06), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.08), 0 4px 8px rgba(0,0,0,0.04);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--primary);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ========== 导航栏 ========== */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--gray-200);
  z-index: 100;
  transition: all 0.3s;
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
}
.nav-brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none; color: var(--primary);
}
.brand-mark {
  background: var(--accent); color: white;
  font-weight: 800; font-size: 18px;
  padding: 6px 12px; border-radius: 6px;
  letter-spacing: 1px;
}
.brand-text {
  font-size: 14px; color: var(--secondary);
  font-weight: 500;
}
.nav-links {
  display: flex; gap: 24px; align-items: center;
}
.nav-links a {
  color: var(--secondary); text-decoration: none;
  font-size: 14px; font-weight: 500;
  transition: color 0.2s;
  position: relative;
}
.nav-links a:hover { color: var(--primary); text-decoration: none; }
.nav-links a::after {
  content: ""; position: absolute;
  left: 0; right: 0; bottom: -4px; height: 2px;
  background: var(--accent);
  transform: scaleX(0); transition: transform 0.2s;
}
.nav-links a:hover::after { transform: scaleX(1); }
.nav-toggle {
  display: none; background: none; border: none;
  flex-direction: column; gap: 5px; padding: 8px;
}
.nav-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--primary); transition: 0.3s;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 100px 24px 60px;
  overflow: hidden;
  color: white;
}
.hero-bg {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, #0A1A2F 0%, #1C2541 50%, #2A3654 100%);
  z-index: -2;
}
.hero-bg::before {
  content: "";
  position: absolute; top: -50%; right: -20%;
  width: 80%; height: 200%;
  background: radial-gradient(circle, rgba(217,4,41,0.15) 0%, transparent 60%);
  z-index: -1;
}
.hero-bg::after {
  content: "";
  position: absolute; bottom: -30%; left: -10%;
  width: 60%; height: 100%;
  background: radial-gradient(circle, rgba(6,167,125,0.1) 0%, transparent 50%);
  z-index: -1;
}
.hero-inner {
  max-width: 1100px; width: 100%;
  text-align: center; position: relative; z-index: 1;
}
.hero-tag {
  display: inline-block;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  padding: 6px 16px; border-radius: 20px;
  font-size: 12px; font-weight: 600; letter-spacing: 2px;
  margin-bottom: 32px;
}
.hero-title {
  font-size: clamp(64px, 12vw, 140px);
  font-weight: 800; line-height: 1;
  letter-spacing: -2px; margin-bottom: 16px;
  background: linear-gradient(180deg, #FFFFFF 0%, #B5C2D6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-subtitle {
  font-size: clamp(20px, 3vw, 32px);
  font-weight: 500; opacity: 0.9;
  margin-bottom: 32px;
}
.hero-points {
  display: flex; justify-content: center; flex-wrap: wrap;
  gap: 12px; margin-bottom: 48px;
}
.hero-points span {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  padding: 8px 18px; border-radius: 24px;
  font-size: 14px; backdrop-filter: blur(10px);
}
.hero-meta {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px; max-width: 900px; margin: 0 auto;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 24px; border-radius: var(--radius);
  backdrop-filter: blur(20px);
}
.meta-item { text-align: left; }
.meta-label {
  font-size: 11px; opacity: 0.6;
  letter-spacing: 1px; text-transform: uppercase;
  margin-bottom: 6px;
}
.meta-value {
  font-size: 16px; font-weight: 600;
}
.hero-scroll {
  position: absolute; bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  font-size: 12px; opacity: 0.5; letter-spacing: 1px;
}
.scroll-arrow {
  width: 1px; height: 30px;
  background: linear-gradient(180deg, white 0%, transparent 100%);
  animation: scrollPulse 2s infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}

/* ========== Section 通用 ========== */
.section {
  padding: 100px 0;
  position: relative;
}
.section-alt { background: var(--bg-alt); }
.section-head {
  max-width: 720px; margin: 0 auto 60px;
  text-align: center;
}
.section-tag {
  display: inline-block;
  background: var(--light); color: var(--accent);
  padding: 6px 14px; border-radius: 20px;
  font-size: 12px; font-weight: 600; letter-spacing: 1px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800; line-height: 1.2;
  letter-spacing: -0.5px; margin-bottom: 12px;
  color: var(--primary);
}
.section-sub {
  font-size: 16px; color: var(--secondary);
  line-height: 1.6;
}
.section-link {
  display: inline-flex; align-items: center; gap: 4px;
  margin-top: 16px;
  color: var(--accent);
  font-size: 14px; font-weight: 600;
  text-decoration: none;
}
.section-link:hover { text-decoration: underline; }
.section-link::after { content: "→"; }

/* ========== 数据 Dashboard ========== */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}
.stat-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.stat-card.stat-primary {
  background: linear-gradient(135deg, #0A1A2F 0%, #1C2541 100%);
  color: white;
  border: none;
}
.stat-card.stat-primary .stat-label { color: rgba(255,255,255,0.7); }
.stat-card.stat-primary .stat-num { color: white; }
.stat-card.stat-primary .stat-unit { color: rgba(255,255,255,0.7); }
.stat-card.stat-primary .stat-change { color: var(--accent); }
.stat-label {
  font-size: 12px; color: var(--secondary);
  letter-spacing: 1px; text-transform: uppercase;
  margin-bottom: 12px; font-weight: 600;
}
.stat-num {
  font-size: 38px; font-weight: 800;
  line-height: 1; color: var(--primary);
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}
.stat-unit {
  font-size: 14px; color: var(--secondary);
  margin-bottom: 12px;
}
.stat-change {
  display: inline-block;
  font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: 12px;
}
.stat-change.up {
  color: var(--green);
  background: var(--green-light);
}
.stat-change.down {
  color: var(--red);
  background: var(--red-light);
}
.stat-card.stat-primary .stat-change.up {
  color: #86efac;
  background: rgba(134,239,172,0.15);
}

/* Sparkline */
.sparkline {
  margin-top: 12px; height: 32px; display: flex; align-items: flex-end; gap: 3px;
}
.spark-bar {
  flex: 1; background: var(--gray-200); border-radius: 1px;
  min-height: 4px;
  transition: all 0.3s;
}
.stat-card.stat-primary .spark-bar { background: rgba(255,255,255,0.2); }
.spark-bar:last-child { background: var(--accent); }
.spark-bar:last-child ~ .spark-bar,
.stat-card.stat-primary .spark-bar:last-child { background: var(--accent); }
.spark-bar.hi { background: var(--accent) !important; }

/* 数据来源 */
.source {
  font-size: 12px; color: var(--gray-400);
  text-align: center; margin-top: 40px;
}

/* ========== 业务卡片 ========== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 20px;
}
.business-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
  text-decoration: none; color: inherit;
  display: block;
}
.business-card::before {
  content: ""; position: absolute;
  top: 0; left: 0; right: 0; height: 3px;
  background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s;
}
.business-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
}
.business-card:hover::before { transform: scaleX(1); }
.b-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 800; font-size: 20px;
  margin-bottom: 16px;
  box-shadow: var(--shadow);
}
.b-name {
  font-size: 18px; font-weight: 700;
  color: var(--primary); margin-bottom: 4px;
}
.b-en {
  font-size: 11px; color: var(--accent);
  letter-spacing: 1px; font-weight: 600;
  text-transform: uppercase; margin-bottom: 16px;
}
.b-stats {
  display: flex; gap: 16px; margin-bottom: 16px;
  padding-bottom: 16px; border-bottom: 1px solid var(--gray-100);
}
.b-stat-num {
  font-size: 22px; font-weight: 800;
  color: var(--accent); line-height: 1;
  font-variant-numeric: tabular-nums;
}
.b-stat-label {
  font-size: 11px; color: var(--gray-400);
  letter-spacing: 1px; margin-top: 2px;
}
.b-points {
  list-style: none;
  border-top: 1px solid var(--gray-200);
  padding-top: 16px;
}
.b-points li {
  font-size: 13px; color: var(--secondary);
  padding: 4px 0;
  position: relative;
  padding-left: 14px;
}
.b-points li::before {
  content: ""; position: absolute;
  left: 0; top: 13px; width: 5px; height: 5px;
  background: var(--accent); border-radius: 50%;
}
.b-cta {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--accent);
  font-weight: 600;
  margin-top: 12px;
  opacity: 0; transition: opacity 0.3s;
}
.business-card:hover .b-cta { opacity: 1; }

/* ========== 核心技术 ========== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 60px;
}
.tech-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
  transition: all 0.3s;
}
.tech-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}
.tech-card.highlight {
  background: linear-gradient(135deg, #D90429 0%, #FF1744 100%);
  color: white;
  border: none;
}
.tech-card.highlight .tech-num {
  background: rgba(255,255,255,0.25); color: white;
}
.tech-card.highlight .tech-name { color: white; }
.tech-card.highlight .tech-spec { color: rgba(255,255,255,0.85); }
.tech-card.highlight .tech-desc { color: rgba(255,255,255,0.95); }
.tech-num {
  display: inline-block;
  background: var(--light); color: var(--accent);
  font-weight: 800; font-size: 14px;
  padding: 4px 10px; border-radius: 6px;
  margin-bottom: 16px;
}
.tech-name {
  font-size: 16px; font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.tech-spec {
  font-size: 22px; font-weight: 800;
  color: var(--accent); margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.tech-desc {
  font-size: 13px; color: var(--secondary);
  line-height: 1.6;
}

.tech-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  padding: 32px;
  background: var(--primary);
  border-radius: var(--radius-lg);
  color: white;
}
.th-item { text-align: center; }
.th-num {
  font-size: 48px; font-weight: 800;
  line-height: 1; margin-bottom: 4px;
  background: linear-gradient(180deg, #FFFFFF 0%, #FF6B35 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-variant-numeric: tabular-nums;
}
.th-label {
  font-size: 14px; font-weight: 600;
  margin-bottom: 4px;
}
.th-sub {
  font-size: 12px; opacity: 0.6;
}

/* ========== 对比表 ========== */
.compare-wrap {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 32px;
  overflow-x: auto;
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 700px;
}
.compare-table th, .compare-table td {
  padding: 14px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}
.compare-table thead th {
  background: var(--primary);
  color: white;
  font-size: 13px; font-weight: 600;
  letter-spacing: 0.5px;
}
.compare-table thead th.hi { background: var(--accent); }
.compare-table tbody tr:hover { background: var(--light); }
.compare-table td.hi {
  font-weight: 700; color: var(--accent);
  background: rgba(217,4,41,0.04);
}
.compare-table td:first-child {
  font-weight: 600; color: var(--secondary);
  background: var(--gray-100);
}
.compare-table tbody tr:last-child td { border-bottom: none; }

.callout {
  background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 100%);
  border: 1px solid #FFD54F;
  border-left: 4px solid #F57C00;
  padding: 20px 24px;
  border-radius: var(--radius);
  display: flex; gap: 16px; align-items: flex-start;
}
.callout-icon {
  font-size: 24px; color: #F57C00;
  font-weight: 800;
}
.callout-text { flex: 1; font-size: 14px; line-height: 1.7; }
.callout-text strong { color: var(--primary); }

/* ========== SOTP 估值 ========== */
.sotp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}
.sotp-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}
.sotp-card::before {
  content: ""; position: absolute;
  top: 0; left: 0; bottom: 0; width: 4px;
  background: var(--accent);
}
.sotp-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.sotp-num {
  font-size: 32px; font-weight: 800;
  color: var(--accent); line-height: 1.1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}
.sotp-label {
  font-size: 16px; font-weight: 700;
  color: var(--primary); margin-bottom: 4px;
}
.sotp-pct {
  display: inline-block;
  background: var(--light); color: var(--accent);
  font-size: 11px; font-weight: 600;
  padding: 3px 8px; border-radius: 4px;
  margin-bottom: 12px;
}
.sotp-note {
  font-size: 13px; color: var(--secondary);
  line-height: 1.5;
}

.sotp-total {
  background: linear-gradient(135deg, #0A1A2F 0%, #1C2541 100%);
  color: white;
  padding: 36px;
  border-radius: var(--radius-lg);
  text-align: center;
  margin-bottom: 40px;
  position: relative;
  overflow: hidden;
}
.sotp-total::before {
  content: ""; position: absolute;
  top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, #D90429 0%, #FF6B35 50%, #D90429 100%);
}
.sotp-total-label {
  font-size: 14px; opacity: 0.7;
  letter-spacing: 2px; text-transform: uppercase;
  margin-bottom: 12px;
}
.sotp-total-num {
  font-size: clamp(36px, 6vw, 60px);
  font-weight: 800; line-height: 1.1;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}
.sotp-total-num span { font-size: 0.6em; opacity: 0.7; }
.sotp-total-vs {
  font-size: 14px; color: #FF6B35; font-weight: 600;
}

.sotp-bar {
  display: flex; height: 48px; border-radius: 8px;
  overflow: hidden; box-shadow: var(--shadow);
}
.sotp-bar .bar-item {
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 13px; font-weight: 600;
  transition: all 0.3s;
}
.sotp-bar .bar-item:hover { filter: brightness(1.1); }

/* ========== 风险 ========== */
.risk-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: 24px;
}
.risk-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px;
  position: relative;
  overflow: hidden;
}
.risk-card.up { border-top: 4px solid var(--green); }
.risk-card.down { border-top: 4px solid var(--accent); }
.risk-head {
  display: flex; align-items: center; gap: 16px;
  margin-bottom: 20px;
}
.risk-icon {
  width: 40px; height: 40px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 800; font-size: 20px;
}
.risk-card.up .risk-icon { background: var(--green); }
.risk-card.down .risk-icon { background: var(--accent); }
.risk-head h3 { font-size: 18px; font-weight: 700; }
.risk-card ul { list-style: none; }
.risk-card li {
  font-size: 14px; color: var(--secondary);
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-100);
  line-height: 1.6;
}
.risk-card li:last-child { border-bottom: none; }
.risk-card li strong { color: var(--primary); }

/* ========== 投资观点 ========== */
.verdict-section {
  background: linear-gradient(180deg, var(--primary) 0%, #1C2541 100%);
  color: white;
}
.verdict-section .section-tag {
  background: rgba(255,255,255,0.1); color: #FF6B35;
}
.verdict-section .section-title { color: white; }
.verdict-section .section-sub { color: rgba(255,255,255,0.7); }

.verdict-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}
.verdict-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 28px;
  backdrop-filter: blur(20px);
  transition: all 0.3s;
}
.verdict-card:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-3px);
}
.verdict-num {
  display: inline-block;
  background: var(--accent); color: white;
  font-size: 12px; font-weight: 800;
  padding: 4px 10px; border-radius: 6px;
  margin-bottom: 16px;
}
.verdict-title {
  font-size: 20px; font-weight: 700;
  color: white; margin-bottom: 12px;
}
.verdict-text {
  font-size: 14px; color: rgba(255,255,255,0.8);
  line-height: 1.7;
}

.rating-box {
  background: linear-gradient(135deg, #D90429 0%, #FF1744 100%);
  border-radius: var(--radius-lg);
  padding: 36px;
  text-align: center;
  margin-bottom: 24px;
  box-shadow: 0 12px 32px rgba(217,4,41,0.3);
}
.rating-label {
  font-size: 12px; letter-spacing: 2px;
  text-transform: uppercase; opacity: 0.85;
  margin-bottom: 8px;
}
.rating-value {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800; margin-bottom: 12px;
}
.rating-desc {
  font-size: 14px; opacity: 0.9;
}

.disclaimer {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 20px 24px;
  font-size: 13px; color: rgba(255,255,255,0.6);
  text-align: center; line-height: 1.7;
}
.disclaimer strong { color: rgba(255,255,255,0.85); }

/* ========== 时间线 ========== */
.timeline {
  position: relative;
  max-width: 800px; margin: 0 auto;
  padding-left: 32px;
}
.timeline::before {
  content: ""; position: absolute;
  left: 8px; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--gray-200) 100%);
}
.timeline-item {
  position: relative; padding-bottom: 32px;
}
.timeline-item::before {
  content: ""; position: absolute;
  left: -28px; top: 6px; width: 14px; height: 14px;
  background: var(--accent);
  border: 3px solid white;
  border-radius: 50%;
  box-shadow: 0 0 0 2px var(--accent);
}
.tl-date {
  display: inline-block;
  background: var(--accent); color: white;
  font-size: 12px; font-weight: 700;
  padding: 3px 10px; border-radius: 4px;
  margin-bottom: 8px;
}
.tl-content {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 16px 20px;
  box-shadow: var(--shadow-sm);
}
.tl-title {
  font-size: 15px; font-weight: 700;
  color: var(--primary); margin-bottom: 4px;
}
.tl-desc {
  font-size: 13px; color: var(--secondary);
}

/* ========== Footer ========== */
.footer {
  background: #050B14; color: rgba(255,255,255,0.7);
  padding: 60px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand {
  font-size: 18px; font-weight: 800;
  color: white; margin-bottom: 12px;
}
.footer-desc {
  font-size: 13px; line-height: 1.7;
  color: rgba(255,255,255,0.5);
  max-width: 480px;
}
.footer-title {
  font-size: 13px; font-weight: 700;
  color: white; text-transform: uppercase;
  letter-spacing: 1px; margin-bottom: 16px;
}
.footer-list { list-style: none; }
.footer-list li {
  font-size: 13px; padding: 4px 0;
  color: rgba(255,255,255,0.5);
  position: relative; padding-left: 14px;
}
.footer-list li::before {
  content: ""; position: absolute;
  left: 0; top: 12px; width: 4px; height: 4px;
  background: var(--accent); border-radius: 50%;
}
.footer-bottom {
  display: flex; justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 12px; color: rgba(255,255,255,0.4);
}

/* ========== Back to top ========== */
.back-top {
  position: fixed; right: 24px; bottom: 24px;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent); color: white;
  border: none; font-size: 20px; font-weight: 700;
  cursor: pointer; box-shadow: 0 4px 12px rgba(217,4,41,0.3);
  opacity: 0; visibility: hidden;
  transition: all 0.3s;
}
.back-top.visible { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-2px); }

/* ========== 详情页通用 ========== */
.page-hero {
  background: linear-gradient(135deg, #0A1A2F 0%, #1C2541 50%, #2A3654 100%);
  color: white;
  padding: 140px 24px 60px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute;
  top: -30%; right: -10%;
  width: 60%; height: 200%;
  background: radial-gradient(circle, rgba(217,4,41,0.12) 0%, transparent 60%);
}
.page-hero-inner {
  max-width: 1100px; margin: 0 auto;
  position: relative; z-index: 1;
}
.breadcrumb {
  font-size: 13px; opacity: 0.7;
  margin-bottom: 16px;
}
.breadcrumb a { color: white; opacity: 0.8; text-decoration: none; }
.breadcrumb a:hover { opacity: 1; }
.page-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800; line-height: 1.1;
  margin-bottom: 12px;
  letter-spacing: -1px;
}
.page-hero .lead {
  font-size: 18px; opacity: 0.85;
  max-width: 720px; line-height: 1.6;
}
.page-hero .meta-row {
  display: flex; flex-wrap: wrap; gap: 24px;
  margin-top: 24px; font-size: 13px; opacity: 0.8;
}
.page-hero .meta-row strong { color: #FF6B35; }

/* Detail cards */
.detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}
.detail-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.3s;
}
.detail-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow);
}
.detail-label {
  font-size: 11px; color: var(--gray-400);
  letter-spacing: 1px; text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 600;
}
.detail-value {
  font-size: 32px; font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.detail-sub {
  font-size: 13px; color: var(--secondary);
}
.detail-sub.up { color: var(--green); font-weight: 600; }
.detail-sub.down { color: var(--red); font-weight: 600; }

/* Big data table */
.data-table {
  width: 100%;
  border-collapse: collapse;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
}
.data-table th, .data-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
  font-size: 14px;
}
.data-table thead th {
  background: var(--light-2);
  font-weight: 700;
  color: var(--primary);
  font-size: 12px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}
.data-table tbody tr:hover { background: var(--light); }
.data-table td:first-child { font-weight: 600; }
.data-table td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
.data-table td.hi {
  color: var(--accent);
  font-weight: 700;
}
.data-table tfoot td {
  background: var(--primary);
  color: white;
  font-weight: 700;
}
.data-table tfoot td:first-child { background: var(--primary); color: white; }

/* Two-column layout */
.two-col {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 32px;
}
@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; }
}

/* Block: text + chart */
.block {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
}
.block-title {
  font-size: 18px; font-weight: 700;
  color: var(--primary);
  margin-bottom: 4px;
}
.block-sub {
  font-size: 14px; color: var(--secondary);
  margin-bottom: 20px;
}
.block-list {
  list-style: none;
}
.block-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--gray-100);
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px;
  font-size: 14px;
}
.block-list li:last-child { border-bottom: none; }
.block-list .lbl { color: var(--secondary); }
.block-list .val { font-weight: 700; color: var(--primary); font-variant-numeric: tabular-nums; }
.block-list .val.up { color: var(--green); }
.block-list .val.down { color: var(--red); }

/* Sidebar info */
.side-card {
  background: var(--light-2);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
}
.side-card h4 {
  font-size: 13px; font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}
.side-card p {
  font-size: 13px; color: var(--secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}
.side-card p:last-child { margin-bottom: 0; }

/* Bar chart (CSS) */
.bar-chart {
  display: flex; align-items: flex-end;
  gap: 8px; height: 200px;
  padding: 16px 0;
  border-bottom: 1px solid var(--gray-200);
}
.bar {
  flex: 1;
  background: linear-gradient(180deg, var(--accent) 0%, var(--accent-2) 100%);
  border-radius: 4px 4px 0 0;
  position: relative;
  min-height: 4px;
  transition: all 0.3s;
}
.bar:hover { filter: brightness(1.1); transform: translateY(-2px); }
.bar .bar-label {
  position: absolute; top: -22px; left: 0; right: 0;
  text-align: center; font-size: 11px;
  font-weight: 700; color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.bar .bar-name {
  position: absolute; bottom: -22px; left: 0; right: 0;
  text-align: center; font-size: 11px;
  color: var(--gray-400);
}

/* H-bar comparison */
.hbar-list { margin: 16px 0; }
.hbar-row {
  display: grid;
  grid-template-columns: 100px 1fr 80px;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  font-size: 13px;
}
.hbar-label { color: var(--secondary); font-weight: 500; }
.hbar-track {
  background: var(--gray-100);
  border-radius: 4px;
  height: 16px;
  overflow: hidden;
  position: relative;
}
.hbar-fill {
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-2) 100%);
  height: 100%;
  border-radius: 4px;
  transition: width 0.6s ease;
}
.hbar-fill.alt { background: linear-gradient(90deg, #1B998B 0%, #06A77D 100%); }
.hbar-fill.alt2 { background: linear-gradient(90deg, #6A4C93 0%, #9F7AEA 100%); }
.hbar-value {
  font-weight: 700; color: var(--primary);
  text-align: right; font-variant-numeric: tabular-nums;
}

/* Tag chip */
.chip {
  display: inline-block;
  background: var(--light);
  color: var(--primary);
  font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 12px;
  margin-right: 6px; margin-bottom: 4px;
}
.chip.accent { background: var(--accent); color: white; }
.chip.green { background: var(--green-light); color: var(--green); }
.chip.red { background: var(--red-light); color: var(--red); }
.chip.dark { background: var(--primary); color: white; }

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 60px; left: 0; right: 0;
    background: white; padding: 16px 24px;
    box-shadow: var(--shadow-lg);
    border-bottom: 1px solid var(--gray-200);
    align-items: flex-start;
  }
  .nav-toggle { display: flex; }
  .section { padding: 60px 0; }
  .section-head { margin-bottom: 40px; }
  .risk-grid { grid-template-columns: 1fr; }
  .tech-highlights { padding: 20px; }
  .th-num { font-size: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .sotp-bar { font-size: 11px; height: 40px; }
  .stat-num { font-size: 30px; }
  .detail-value { font-size: 24px; }
  .business-grid { grid-template-columns: 1fr; }
  .hbar-row { grid-template-columns: 80px 1fr 60px; font-size: 12px; }
}

@media (max-width: 600px) {
  .hero { padding-top: 80px; }
  .tech-highlights { grid-template-columns: repeat(2, 1fr); }
  .stat-grid { grid-template-columns: 1fr 1fr; }
}

/* 淡入动画 */
.fade-in {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* 内部页脚 */
.page-footer {
  background: var(--light-2);
  padding: 40px 0;
  border-top: 1px solid var(--gray-200);
}
.page-footer-inner {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.page-footer a { color: var(--secondary); }
.page-footer .back-home {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--accent); font-weight: 600;
  text-decoration: none;
}
.page-footer .next-page {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent); color: white;
  padding: 10px 18px; border-radius: 8px;
  font-weight: 600; text-decoration: none;
  transition: all 0.3s;
}
.page-footer .next-page:hover {
  background: var(--accent-2);
  text-decoration: none;
}