/* ==========================================================================
   金鲸智麦 AI · 全站设计系统
   ========================================================================== */

/* ---------- 0. 设计令牌（CSS 变量） ---------- */
:root {
  /* 主色 - 深海蓝 (鲸) */
  --c-primary-900: #060F1F;
  --c-primary-800: #0A1628;
  --c-primary-700: #0F1F38;
  --c-primary-600: #1A2B4A;
  --c-primary-500: #2A3F60;
  --c-primary-400: #4A5F80;

  /* 点缀 - 古典金 (金) */
  --c-gold-900: #5C4E2F;
  --c-gold-700: #8B7355;
  --c-gold-500: #C9A961;
  --c-gold-400: #D4B574;
  --c-gold-300: #E8C580;
  --c-gold-100: #F5EBD0;

  /* 中性 */
  --c-bg: #FFFFFF;
  --c-bg-warm: #FAF7F1;
  --c-bg-cream: #F5F0E6;
  --c-bg-soft: #F8F6F1;
  --c-border: #E8E4DD;
  --c-border-light: #F0ECE5;

  /* 文本 */
  --c-text: #0A1628;
  --c-text-2: #3A4A5C;
  --c-text-3: #6B7280;
  --c-text-4: #9CA3AF;
  --c-text-inv: #FFFFFF;

  /* 功能 */
  --c-success: #2D7D5F;
  --c-accent: #C9A961;

  /* 字体 */
  --f-serif-cn: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
  --f-sans-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --f-serif-en: "Cormorant Garamond", "Playfair Display", Georgia, serif;
  --f-sans-en: "Inter", "Helvetica Neue", Arial, sans-serif;

  /* 字号尺度 */
  --fs-xs: 12px;
  --fs-sm: 14px;
  --fs-base: 16px;
  --fs-md: 18px;
  --fs-lg: 20px;
  --fs-xl: 24px;
  --fs-2xl: 32px;
  --fs-3xl: 40px;
  --fs-4xl: 56px;
  --fs-5xl: 72px;

  /* 间距 */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;
  --sp-10: 128px;

  /* 容器 */
  --container: 1280px;
  --container-narrow: 960px;

  /* 圆角 */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-pill: 999px;

  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(10,22,40,0.06), 0 1px 2px rgba(10,22,40,0.04);
  --shadow-md: 0 4px 12px rgba(10,22,40,0.08), 0 2px 4px rgba(10,22,40,0.04);
  --shadow-lg: 0 12px 32px rgba(10,22,40,0.10), 0 4px 8px rgba(10,22,40,0.05);
  --shadow-gold: 0 8px 24px rgba(201,169,97,0.18);

  /* 过渡 */
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast: 0.2s var(--ease);
  --t-mid: 0.4s var(--ease);
  --t-slow: 0.7s var(--ease);
}

/* ---------- 1. 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--f-sans-cn);
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; transition: color var(--t-fast); }
a:hover { color: var(--c-gold-500); }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }
input, textarea, select { font: inherit; }

::selection { background: var(--c-gold-300); color: var(--c-primary-800); }

/* ---------- 2. 排版 ---------- */
.h-serif { font-family: var(--f-serif-cn); font-weight: 600; letter-spacing: 0.02em; }
.h-display {
  font-family: var(--f-serif-cn);
  font-size: var(--fs-5xl);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--c-primary-800);
}
.h1 {
  font-family: var(--f-serif-cn);
  font-size: var(--fs-4xl);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.005em;
  color: var(--c-primary-800);
}
.h2 {
  font-family: var(--f-serif-cn);
  font-size: var(--fs-3xl);
  font-weight: 700;
  line-height: 1.25;
  color: var(--c-primary-800);
}
.h3 {
  font-family: var(--f-serif-cn);
  font-size: var(--fs-2xl);
  font-weight: 600;
  line-height: 1.35;
  color: var(--c-primary-800);
}
.h4 {
  font-family: var(--f-sans-cn);
  font-size: var(--fs-xl);
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-primary-800);
}
.lead {
  font-size: var(--fs-md);
  line-height: 1.75;
  color: var(--c-text-2);
}
.text-sm { font-size: var(--fs-sm); color: var(--c-text-3); }
.text-gold { color: var(--c-gold-500); }
.text-light { color: var(--c-text-3); }
.text-uppercase { text-transform: uppercase; letter-spacing: 0.15em; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-gold-700);
}
.eyebrow::before {
  content: "";
  width: 32px;
  height: 1px;
  background: var(--c-gold-500);
}

/* ---------- 3. 布局 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}
.container-narrow {
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--sp-5);
}
.section {
  padding: var(--sp-9) 0;
}
.section-sm { padding: var(--sp-8) 0; }
.section-lg { padding: var(--sp-10) 0; }

.grid { display: grid; gap: var(--sp-5); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-6 { grid-template-columns: repeat(6, 1fr); }

@media (max-width: 900px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
  .h-display { font-size: var(--fs-3xl); }
  .h1 { font-size: var(--fs-3xl); }
  .h2 { font-size: var(--fs-2xl); }
  .section { padding: var(--sp-8) 0; }
}

/* ---------- 4. 顶部导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--t-mid);
}
.nav.scrolled {
  background: rgba(255,255,255,0.95);
  border-bottom-color: var(--c-border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--f-serif-cn);
  font-weight: 700;
}
.brand-mark {
  width: 40px;
  height: 40px;
  background: var(--c-primary-800);
  border-radius: 50%;
  position: relative;
  display: grid;
  place-items: center;
  color: var(--c-gold-300);
  font-family: var(--f-serif-cn);
  font-size: 22px;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px var(--c-gold-500);
}
.brand-mark::after {
  content: "";
  position: absolute;
  inset: -3px;
  border: 1px solid var(--c-gold-500);
  border-radius: 50%;
  opacity: 0.3;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-text .cn { font-size: 18px; color: var(--c-primary-800); letter-spacing: 0.05em; }
.brand-text .en { font-size: 10px; color: var(--c-text-3); letter-spacing: 0.2em; text-transform: uppercase; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-6);
}
.nav-menu a {
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text-2);
  position: relative;
  padding: 8px 0;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--c-gold-500);
  transition: all var(--t-fast);
  transform: translateX(-50%);
}
.nav-menu a:hover, .nav-menu a.active { color: var(--c-primary-800); }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }
.nav-cta {
  padding: 10px 20px;
  background: var(--c-primary-800);
  color: var(--c-gold-300);
  border-radius: var(--r-pill);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.05em;
  transition: all var(--t-fast);
}
.nav-cta:hover {
  background: var(--c-gold-500);
  color: var(--c-primary-800);
}
.nav-toggle { display: none; }

/* ---------- 导航下拉菜单 ---------- */
.nav-dropdown { position: relative; }
.nav-dropdown-trigger {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 15px;
  font-weight: 500;
  color: var(--c-text-2);
  padding: 8px 0;
  cursor: pointer;
  position: relative;
}
.nav-dropdown-trigger::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--c-gold-500);
  transition: all var(--t-fast);
  transform: translateX(-50%);
}
.nav-dropdown-trigger .caret {
  width: 10px; height: 10px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform var(--t-fast);
  margin-left: 2px;
  opacity: 0.7;
}
.nav-dropdown:hover .nav-dropdown-trigger,
.nav-dropdown.open .nav-dropdown-trigger { color: var(--c-primary-800); }
.nav-dropdown:hover .nav-dropdown-trigger::after,
.nav-dropdown.open .nav-dropdown-trigger::after { width: 100%; }
.nav-dropdown:hover .nav-dropdown-trigger .caret,
.nav-dropdown.open .nav-dropdown-trigger .caret { transform: rotate(225deg) translate(-2px, -2px); }

.nav-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(-8px);
  min-width: 640px;
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-lg);
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--t-fast), transform var(--t-fast), visibility var(--t-fast);
  z-index: 110;
}
.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown.open .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
/* 下拉菜单顶部小三角 */
.nav-dropdown-menu::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px;
  height: 12px;
  background: var(--c-bg);
  border-top: 1px solid var(--c-border);
  border-left: 1px solid var(--c-border);
}

.nav-dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  transition: background var(--t-fast);
  color: var(--c-text-2);
}
.nav-dropdown-item:hover {
  background: var(--c-bg-warm);
  color: var(--c-primary-800);
}
.nav-dropdown-item .ico {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--c-primary-800);
  color: var(--c-gold-300);
  display: grid;
  place-items: center;
  font-family: var(--f-serif-cn);
  font-size: 16px;
  font-weight: 700;
  border: 1px solid rgba(201,169,97,0.3);
}
.nav-dropdown-item:hover .ico {
  background: var(--c-gold-500);
  color: var(--c-primary-800);
}
.nav-dropdown-item .text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.3;
}
.nav-dropdown-item .text strong {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-primary-800);
}
.nav-dropdown-item .text small {
  font-size: 11px;
  color: var(--c-text-3);
  letter-spacing: 0.05em;
}

@media (max-width: 900px) {
  .nav-menu { display: none; }
  .nav-toggle {
    display: block;
    width: 40px; height: 40px;
    color: var(--c-primary-800);
  }
  .nav-dropdown-menu {
    min-width: auto;
    width: 90vw;
    grid-template-columns: 1fr;
  }
}

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-2);
  padding: 14px 28px;
  font-family: var(--f-sans-cn);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.05em;
  border-radius: var(--r-pill);
  transition: all var(--t-mid);
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary {
  background: var(--c-primary-800);
  color: var(--c-gold-300);
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  background: var(--c-primary-700);
  color: var(--c-gold-300);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-gold {
  background: var(--c-gold-500);
  color: var(--c-primary-800);
  box-shadow: var(--shadow-gold);
}
.btn-gold:hover {
  background: var(--c-gold-400);
  color: var(--c-primary-800);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--c-primary-800);
  border: 1px solid var(--c-primary-800);
}
.btn-outline:hover {
  background: var(--c-primary-800);
  color: var(--c-gold-300);
}
.btn-outline-light {
  background: transparent;
  color: var(--c-gold-300);
  border: 1px solid var(--c-gold-500);
}
.btn-outline-light:hover {
  background: var(--c-gold-500);
  color: var(--c-primary-800);
}
.btn .arrow {
  transition: transform var(--t-fast);
}
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- 6. 页脚 ---------- */
.footer {
  background: var(--c-primary-900);
  color: var(--c-gold-100);
  padding: var(--sp-8) 0 var(--sp-5);
  position: relative;
  overflow: hidden;
}
.footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-gold-500), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--sp-7);
  margin-bottom: var(--sp-7);
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--sp-5); }
}
.footer-brand .brand { margin-bottom: var(--sp-4); }
.footer-brand p { color: var(--c-text-4); line-height: 1.7; max-width: 360px; font-size: 14px; }
.footer-col h5 {
  font-size: 14px;
  color: var(--c-gold-300);
  margin-bottom: var(--sp-4);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.footer-col a {
  display: block;
  color: var(--c-text-4);
  padding: 6px 0;
  font-size: 14px;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: var(--c-gold-300); }
.footer-bottom {
  border-top: 1px solid rgba(201,169,97,0.15);
  padding-top: var(--sp-5);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--sp-3);
  font-size: 13px;
  color: var(--c-text-4);
}

/* ---------- 7. 工具类 ---------- */
.divider {
  width: 60px;
  height: 1px;
  background: var(--c-gold-500);
  margin: var(--sp-4) 0;
}
.divider-center { margin-left: auto; margin-right: auto; }
.text-center { text-align: center; }
.mb-1 { margin-bottom: var(--sp-1); }
.mb-2 { margin-bottom: var(--sp-2); }
.mb-3 { margin-bottom: var(--sp-3); }
.mb-4 { margin-bottom: var(--sp-4); }
.mb-5 { margin-bottom: var(--sp-5); }
.mb-6 { margin-bottom: var(--sp-6); }
.mb-7 { margin-bottom: var(--sp-7); }
.mt-5 { margin-top: var(--sp-5); }
.mt-6 { margin-top: var(--sp-6); }
.mt-7 { margin-top: var(--sp-7); }
.gap-3 { gap: var(--sp-3); }
.gap-4 { gap: var(--sp-4); }
.gap-5 { gap: var(--sp-5); }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* ---------- 8. 动画 ---------- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---------- 9. Hero 通用 ---------- */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding-top: 72px;
  background: linear-gradient(135deg, var(--c-bg-warm) 0%, var(--c-bg-cream) 50%, var(--c-bg) 100%);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: -20%; right: -10%;
  width: 60%; height: 120%;
  background: radial-gradient(circle, rgba(201,169,97,0.10) 0%, transparent 60%);
  z-index: 0;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -30%; left: -10%;
  width: 50%; height: 80%;
  background: radial-gradient(circle, rgba(10,22,40,0.06) 0%, transparent 60%);
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: var(--sp-8);
  align-items: center;
  padding: var(--sp-9) 0;
}
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: var(--sp-6); }
  .hero { min-height: 60vh; }
}
.hero-title {
  font-family: var(--f-serif-cn);
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  color: var(--c-primary-800);
  margin: var(--sp-4) 0;
  letter-spacing: -0.01em;
}
.hero-sub {
  font-size: var(--fs-md);
  line-height: 1.8;
  color: var(--c-text-2);
  max-width: 540px;
  margin-bottom: var(--sp-6);
}
.hero-actions { display: flex; gap: var(--sp-3); flex-wrap: wrap; }
.hero-visual {
  position: relative;
  aspect-ratio: 1;
  background: linear-gradient(135deg, var(--c-primary-800), var(--c-primary-600));
  border-radius: var(--r-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.hero-visual-inner {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--c-gold-300);
  font-family: var(--f-serif-cn);
}

/* 鲸鱼标识图形 - 用 SVG 表达 */
.whale-mark {
  width: 60%;
  aspect-ratio: 1.6;
  display: block;
  margin: 0 auto;
}

/* ---------- 10. Page Header（子页头） ---------- */
.page-header {
  padding: 160px 0 80px;
  background: linear-gradient(135deg, var(--c-primary-800) 0%, var(--c-primary-700) 100%);
  color: var(--c-gold-100);
  position: relative;
  overflow: hidden;
}
.page-header::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 80% 30%, rgba(201,169,97,0.15) 0%, transparent 50%);
}
.page-header-inner { position: relative; z-index: 1; max-width: 720px; }
.page-header .eyebrow { color: var(--c-gold-300); }
.page-header .eyebrow::before { background: var(--c-gold-300); }
.page-header h1 {
  font-family: var(--f-serif-cn);
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 700;
  line-height: 1.2;
  margin: var(--sp-3) 0;
  color: var(--c-text-inv);
}
.page-header p {
  font-size: var(--fs-md);
  line-height: 1.8;
  color: var(--c-gold-100);
  opacity: 0.85;
}
.breadcrumb {
  font-size: 13px;
  color: var(--c-gold-100);
  opacity: 0.7;
  margin-bottom: var(--sp-4);
}
.breadcrumb a:hover { color: var(--c-gold-300); opacity: 1; }

/* ---------- 11. 卡片 ---------- */
.card {
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: all var(--t-mid);
}
.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--c-gold-300);
}
.card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--r-md);
  background: var(--c-bg-warm);
  color: var(--c-gold-700);
  display: grid;
  place-items: center;
  font-family: var(--f-serif-cn);
  font-size: 22px;
  font-weight: 700;
  margin-bottom: var(--sp-4);
  border: 1px solid var(--c-gold-100);
}
.card-title {
  font-family: var(--f-serif-cn);
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--sp-2);
  color: var(--c-primary-800);
}
.card-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-text-2);
}

/* ---------- 12. 章节区段 ---------- */
.section-head {
  margin-bottom: var(--sp-7);
  max-width: 720px;
}
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 { margin-top: var(--sp-3); }
.section-head p {
  margin-top: var(--sp-3);
  font-size: var(--fs-md);
  color: var(--c-text-2);
  line-height: 1.7;
}

/* ---------- 13. 数字展示 ---------- */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--sp-5);
  margin-top: var(--sp-6);
}
@media (max-width: 900px) { .stat-grid { grid-template-columns: repeat(2, 1fr); } }
.stat {
  text-align: center;
  padding: var(--sp-5) 0;
}
.stat-num {
  font-family: var(--f-serif-en);
  font-size: 56px;
  font-weight: 700;
  color: var(--c-gold-500);
  line-height: 1;
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
}
.stat-num small {
  font-size: 20px;
  color: var(--c-gold-700);
}
.stat-label {
  margin-top: var(--sp-3);
  font-size: 14px;
  color: var(--c-text-2);
  letter-spacing: 0.1em;
}

/* ---------- 14. 时间轴 ---------- */
.timeline {
  position: relative;
  padding-left: var(--sp-6);
}
.timeline::before {
  content: "";
  position: absolute;
  left: 8px; top: 0; bottom: 0;
  width: 1px;
  background: var(--c-gold-300);
}
.timeline-item {
  position: relative;
  padding-bottom: var(--sp-6);
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -28px; top: 8px;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--c-gold-500);
  box-shadow: 0 0 0 4px var(--c-bg-warm);
}
.timeline-year {
  font-family: var(--f-serif-en);
  font-size: var(--fs-xl);
  color: var(--c-gold-700);
  font-weight: 600;
}
.timeline-title {
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--c-primary-800);
  margin: var(--sp-1) 0;
}
.timeline-desc {
  font-size: 14px;
  color: var(--c-text-2);
  line-height: 1.7;
}

/* ---------- 15. 表单 ---------- */
.form-group { margin-bottom: var(--sp-4); }
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: var(--sp-2);
  color: var(--c-text-2);
}
.form-control {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
  font-family: inherit;
  font-size: 15px;
  color: var(--c-text);
  background: var(--c-bg);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.form-control:focus {
  outline: none;
  border-color: var(--c-gold-500);
  box-shadow: 0 0 0 3px var(--c-gold-100);
}
textarea.form-control { min-height: 140px; resize: vertical; }