/* ========================================
   荒野科学 2026 夏令营 — 样式系统
   ======================================== */

/* ---- CSS Variables ---- */
:root {
  --color-primary: #003296;
  --color-primary-dark: #002070;
  --color-primary-light: #3366b8;
  --color-accent: #FDD22B;
  --color-accent-dark: #e6bc00;
  --color-bg-dark: #001021;
  --color-bg-light: #FAF9F6;
  --color-text: #2d3748;
  --color-text-light: #8B92A0;
  --color-white: #ffffff;
  --color-decoration: #D4A017;
  --color-wood: #D1B691;

  /* 中间色阶 */
  --color-primary-50: #e8edf8;
  --color-primary-100: #b3c4e8;
  --color-accent-light: #fef3c7;
  --color-accent-50: #fef9e7;

  /* 产品分级色 */
  --color-kepu: #FF7A00;
  --color-kepu-light: #FFF500;
  --color-kechuang: #0084FF;
  --color-kechuang-light: #00D166;
  --color-kekao: #001021;
  --color-kekao-gold: #D4AF37;
  --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Nunito', sans-serif;
  --nav-height: 72px;
  --max-width: 1200px;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 2px 12px rgba(0,50,150,0.06);
  --shadow-lg: 0 8px 32px rgba(0,50,150,0.1);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* ===== 字体大小体系 ===== */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 26px;
  --font-size-3xl: 32px;
  --font-size-4xl: 42px;
  --font-size-5xl: 56px;
  --font-size-6xl: 72px;

  /* ===== 行高体系 ===== */
  --line-height-tight: 1.3;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.85;

  /* ===== 间距体系 ===== */
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 60px;
  --space-4xl: 80px;
  --space-5xl: 100px;

  /* ===== 动画时间体系 ===== */
  --duration-fast: 0.15s;
  --duration-base: 0.3s;
  --duration-slow: 0.6s;
  --duration-slower: 1s;
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---- Reset ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--nav-height); }
body {
  font-family: var(--font-main);
  color: var(--color-text);
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

/* ---- Container ---- */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ---- Section ---- */
.section { padding: 100px 0; }
.section-white { background: var(--color-white); }
.section-light { background: var(--color-bg-light); }
.section-dark {
  background:
    linear-gradient(135deg, rgba(0,16,33,0.95) 0%, rgba(0,50,150,0.92) 100%),
    url('../images/nature-bg-dark.jpg') center/cover no-repeat;
  color: var(--color-white);
  position: relative;
}
.section-gradient {
  background:
    linear-gradient(135deg, rgba(0,50,150,0.93) 0%, rgba(0,16,33,0.96) 100%),
    url('../images/nature-bg-dark.jpg') center/cover no-repeat;
  color: var(--color-white);
  position: relative;
  overflow: hidden;
}

.section-header { text-align: center; margin-bottom: 60px; }
.section-title {
  font-size: 42px; font-weight: 800; margin-bottom: 16px; letter-spacing: -0.5px;
  background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 60%, var(--color-primary-dark) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-title.light {
  background: none; -webkit-text-fill-color: var(--color-white); color: var(--color-white);
}
.section-desc { font-size: 18px; color: #6B7280; max-width: 680px; margin: 0 auto; line-height: 1.9; margin-bottom: 1.2em; }
.section-desc.light { color: rgba(255,255,255,0.8); }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px; font-size: 16px; font-weight: 600;
  transition: all var(--transition); cursor: pointer; border: 2px solid transparent;
}
.btn-lg { padding: 16px 40px; font-size: 17px; }
.btn-xl { padding: 20px 52px; font-size: 18px; }
.btn-block { display: flex; width: 100%; }
.btn-accent { background: var(--color-accent); color: var(--color-primary); border-color: var(--color-accent); }
.btn-accent:hover { background: var(--color-accent-dark); border-color: var(--color-accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(253,210,43,0.4); }
.btn-outline-white { background: transparent; color: var(--color-white); border-color: rgba(255,255,255,0.5); }
.btn-outline-white:hover { background: rgba(255,255,255,0.15); border-color: var(--color-white); }
.btn-white { background: var(--color-white); color: var(--color-primary); border-color: var(--color-white); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(0,0,0,0.2); }

/* 按钮弹跳hover效果 - 增强现有按钮 */
.btn-accent:hover, .btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,50,150,0.2);
}
.btn-accent:active, .btn-white:active {
  transform: translateY(0) scale(0.99);
}

/* ========================================
   NAV
   ======================================== */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-height); transition: all var(--transition);
  background: rgba(0,16,33,0.3); backdrop-filter: blur(8px);
}
.nav.scrolled {
  background: rgba(255,255,255,0.95); backdrop-filter: blur(12px);
  box-shadow: 0 1px 12px rgba(0,0,0,0.08);
}
.nav-inner {
  max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; height: 100%;
}
.nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--color-white); transition: color var(--transition); }
.nav.scrolled .nav-logo { color: var(--color-text); }
.nav-logo img { height: 40px; width: auto; object-fit: contain; display: block; }
.nav-logo-icon {
  width: 36px; height: 36px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  background: var(--color-primary); color: var(--color-white); font-family: var(--font-en); font-weight: 800; font-size: 18px;
}
.nav-links { display: flex; gap: 8px; }
.nav-link {
  padding: 8px 16px; font-size: 15px; font-weight: 500; border-radius: 8px;
  color: rgba(255,255,255,0.85); transition: all var(--transition);
}
.nav.scrolled .nav-link { color: var(--color-text); }
.nav-link:hover, .nav-link.active { color: var(--color-white); background: rgba(255,255,255,0.15); }
.nav.scrolled .nav-link:hover, .nav.scrolled .nav-link.active { color: var(--color-primary); background: linear-gradient(135deg, rgba(0,50,150,0.15) 0%, rgba(0,80,200,0.1) 100%); font-weight: 700; box-shadow: 0 2px 8px rgba(0,50,150,0.15); border-radius: 8px; }
.nav-cta {
  padding: 10px 24px; border-radius: 50px; font-size: 14px; font-weight: 600;
  background: var(--color-accent); color: var(--color-primary); transition: all 0.3s ease;
  box-shadow: 0 2px 8px rgba(253,210,43,0.3);
}
.nav-cta:hover { background: var(--color-accent-dark); transform: translateY(-2px); box-shadow: 0 4px 16px rgba(253,210,43,0.4); }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; width: 44px; height: 44px; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; }
.nav-hamburger span { width: 24px; height: 2px; background: var(--color-white); transition: all var(--transition); border-radius: 2px; }
.nav.scrolled .nav-hamburger span { background: var(--color-text); }
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Nav Overlay */
.mobile-nav-overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0; z-index: 999;
  background: rgba(0,16,33,0.97); backdrop-filter: blur(20px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity var(--transition);
}
.mobile-nav-overlay.open { opacity: 1; pointer-events: auto; }
.mobile-nav-links { text-align: center; }
.mobile-nav-links li { margin: 16px 0; }
.mobile-nav-links a { font-size: 24px; font-weight: 600; color: var(--color-white); padding: 12px 24px; display: inline-block; transition: color var(--transition); }
.mobile-nav-links a:hover { color: var(--color-accent); }
.mobile-nav-cta {
  display: inline-block !important; margin-top: 16px !important;
  background: var(--color-accent); border-radius: 50px; padding: 16px 48px !important;
}

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: flex-start; justify-content: center;
  overflow: hidden; padding-top: calc(var(--nav-height) + 120px);
}
.hero-bg {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  transform: scale(1.05); transition: transform 8s ease-out;
}
.hero.loaded .hero-bg { transform: scale(1); }
.hero-overlay {
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(0,50,150,0.6) 0%, rgba(0,30,100,0.5) 40%, rgba(0,16,33,0.92) 100%);
}
/* 浮动粒子容器 */
.hero-particles {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  pointer-events: none;
  z-index: 1;
  overflow: hidden;
}
/* 单个浮动粒子 */
.hero-particle {
  position: absolute;
  pointer-events: none;
  will-change: transform, opacity;
  animation: particleDrift 18s ease-in-out infinite;
}
/* === 粒子轻重层次 === */
/* 重粒子：大、亮、慢 */
.hero-particle[data-weight="heavy"] {
  opacity: 0.85;
}
.hero-particle[data-weight="heavy"].hero-particle--text {
  color: rgba(255,255,255,0.35);
  text-shadow: 0 0 12px rgba(253,210,43,0.15), 0 0 24px rgba(255,255,255,0.06);
}
.hero-particle[data-weight="heavy"].hero-particle--svg svg {
  stroke: rgba(255,255,255,0.3);
  stroke-width: 1.5;
}
.hero-particle[data-weight="heavy"].hero-particle--line svg {
  stroke: rgba(253,210,43,0.3);
  stroke-width: 1.5;
}
/* 中粒子：标准 */
.hero-particle[data-weight="medium"] {
  opacity: 0.65;
}
.hero-particle[data-weight="medium"].hero-particle--text {
  color: rgba(255,255,255,0.2);
  text-shadow: 0 0 6px rgba(253,210,43,0.08);
}
.hero-particle[data-weight="medium"].hero-particle--svg svg {
  stroke: rgba(255,255,255,0.18);
}
.hero-particle[data-weight="medium"].hero-particle--line svg {
  stroke: rgba(253,210,43,0.18);
}
/* 轻粒子：小、淡、快 */
.hero-particle[data-weight="light"] {
  opacity: 0.4;
}
.hero-particle[data-weight="light"].hero-particle--text {
  color: rgba(255,255,255,0.1);
}
.hero-particle[data-weight="light"].hero-particle--svg svg {
  stroke: rgba(255,255,255,0.08);
}
.hero-particle[data-weight="light"].hero-particle--line svg {
  stroke: rgba(253,210,43,0.08);
}
/* 文字粒子基础字体 */
.hero-particle--text {
  font-family: 'Georgia', 'Times New Roman', serif;
  font-style: italic;
  font-weight: 400;
  white-space: nowrap;
}
/* SVG粒子基础 */
.hero-particle--svg svg,
.hero-particle--line svg {
  fill: none;
}
/* 浮动动画 — 不同速度组 */
@keyframes particleDrift {
  0% { transform: translate(0, 0) rotate(0deg); opacity: 0; }
  8% { opacity: 0.9; }
  50% { opacity: 1; }
  92% { opacity: 0.9; }
  100% { transform: translate(var(--dx, 40px), var(--dy, -120px)) rotate(var(--dr, 30deg)); opacity: 0; }
}
@keyframes particleSway {
  0%, 100% { transform: translateX(0) rotate(0deg); }
  25% { transform: translateX(10px) rotate(3deg); }
  75% { transform: translateX(-10px) rotate(-3deg); }
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 100px;
  background: linear-gradient(to top, rgba(0,16,33,0.9) 0%, transparent 100%);
  pointer-events: none; z-index: 0;
}
.hero-content {
  position: relative; z-index: 2; text-align: center; padding: 0 24px;
  max-width: 900px;
}
.hero-badge {
  display: inline-block; padding: 8px 24px; border-radius: 50px;
  background: rgba(255,255,255,0.1); backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.9); font-size: 14px; font-weight: 500;
  letter-spacing: 2px; margin-bottom: 24px; font-family: var(--font-en);
}
.hero-title {
  font-size: 72px; font-weight: 900; color: var(--color-white); line-height: 1.1;
  margin-bottom: 16px; letter-spacing: -1px;
  text-shadow: 0 2px 40px rgba(0,16,33,0.3), 0 0 80px rgba(253,210,43,0.1);
}
.hero-slogan {
  font-size: 16px;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  opacity: 0.7;
  margin-top: 12px;
  margin-bottom: 24px;
  font-weight: 500;
}
.hero-tagline {
  font-size: 18px; color: #FDD22B; font-weight: 500; margin-bottom: 80px;
  text-shadow: 0 1px 20px rgba(0,16,33,0.2);
}
.hero-subtitle {
  font-size: 24px; color: transparent; font-weight: 300; margin-bottom: 32px;
  height: 36px; /* 保留占位空间 */
}
.hero-tags { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.hero-tag {
  padding: 10px 20px; border-radius: 50px; background: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px); border: 1px solid rgba(255,255,255,0.15);
  color: var(--color-white); font-size: 15px; font-weight: 500;
}
.hero-camp-btn {
  text-decoration: none; cursor: pointer; transition: all 0.3s ease;
}
.hero-camp-btn:hover {
  background: rgba(255,255,255,0.25); transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
/* 营地详情页 — 返回首页悬浮按钮 */
.back-home-fab {
  position: fixed; bottom: 24px; left: 24px;
  background: var(--color-primary); color: #fff;
  padding: 12px 20px; border-radius: 50px;
  font-size: 14px; font-weight: 600;
  text-decoration: none;
  box-shadow: 0 4px 15px rgba(0,0,0,0.3);
  z-index: 999; transition: all 0.3s ease;
}
.back-home-fab:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.4);
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 36px; }
.hero-scroll-hint {
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255,255,255,0.85); cursor: pointer;
  text-decoration: none;
  animation: scrollBounce 2.5s ease-in-out infinite;
}
.hero-scroll-hint .scroll-text {
  font-size: 13px; letter-spacing: 3px; font-weight: 500;
  opacity: 0.8;
}
.hero-scroll-hint svg {
  filter: drop-shadow(0 2px 6px rgba(0,0,0,0.3));
  opacity: 0.9;
}
@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* Hero photo background variant */
.hero-photo-bg {
  background-size: cover;
  background-position: center;
  position: relative;
}
.hero-photo-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0,21,66,0.7) 0%, rgba(0,50,150,0.5) 100%);
  z-index: 0;
}
.hero-photo-bg > * {
  position: relative;
  z-index: 1;
}

/* ========================================
   FEATURES (About Section)
   ======================================== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; margin-bottom: 60px; }
.feature-card {
  padding: 40px 32px; border-radius: var(--radius); background: var(--color-white);
  border: 1px solid #e2e8f0; text-align: center; transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,50,150,0.04);
}
.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}
.feature-card:nth-child(1)::after {
  background: linear-gradient(90deg, #003296, #0055ff);
}
.feature-card:nth-child(2)::after {
  background: linear-gradient(90deg, #FDD22B, #FFE55C);
}
.feature-card:nth-child(3)::after {
  background: linear-gradient(90deg, #D4A017, #F0D050);
}
.feature-card:hover { transform: translateY(-8px); box-shadow: 0 12px 40px rgba(0,50,150,0.12); border-color: var(--color-primary-light); }
.feature-icon {
  width: 64px; height: 64px; margin: 0 auto 20px; color: var(--color-primary);
  background: var(--color-primary-50); border-radius: 16px; padding: 14px;
  transition: transform 0.3s ease;
}
.feature-card:hover .feature-icon { transform: scale(1.1); }
.feature-icon svg { width: 100%; height: 100%; }
.feature-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { font-size: 15px; color: var(--color-text-light); line-height: 1.8; }

/* Stats */
.stats-row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  padding: 48px 40px; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--color-primary) 0%, #001021 100%);
  box-shadow: 0 8px 32px rgba(0,50,150,0.15);
  position: relative;
  overflow: hidden;
}
.stat-item {
  text-align: center;
  color: var(--color-white);
  background: rgba(255,255,255,0.05);
  border-radius: 12px;
  padding: 20px;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08);
  position: relative;
  z-index: 1;
}
.stat-number { font-size: 48px; font-weight: 800; font-family: var(--font-en); display: inline; }
.stat-suffix { font-size: 24px; font-weight: 600; }
.stat-label { display: block; font-size: 14px; opacity: 0.8; margin-top: 4px; }

/* ========================================
   LAB TABS
   ======================================== */
.lab-tabs {
  display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 40px;
}
.lab-tab {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 16px 28px; border-radius: var(--radius-sm);
  border: 2px solid #e2e8f0; background: var(--color-white);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1); font-family: var(--font-main);
  box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}
.lab-tab:hover { border-color: var(--color-primary-light); transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,50,150,0.08); }
.lab-tab.active {
  border-color: var(--color-primary); background: var(--color-primary); color: var(--color-white);
  box-shadow: 0 4px 20px rgba(0,50,150,0.25);
}
.lab-tab-num { font-size: 13px; font-family: var(--font-en); font-weight: 800; color: var(--color-accent-dark); }
.lab-tab.active .lab-tab-num { color: var(--color-accent); }
.lab-tab-name { font-size: 15px; font-weight: 700; white-space: nowrap; }

/* Lab Panels */
.lab-panel { display: none; }
.lab-panel.active { display: block; animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }

.lab-panel-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: stretch; }
.lab-image { border-radius: var(--radius); overflow: hidden; position: relative; }
.lab-image img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; }
.lab-info { padding: 8px 0; display: flex; flex-direction: column; }
.lab-content {
  border-left: 4px solid var(--color-primary);
  padding-left: 24px;
  margin-left: -4px;
}
/* 课题级别标签颜色 */
.grade-tag-low {
  background: var(--color-kepu);
  color: white;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.grade-tag-high {
  background: var(--color-kechuang);
  color: white;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.grade-tag-middle {
  background: var(--color-kekao-gold);
  color: var(--color-kekao);
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.lab-location { font-size: 14px; color: var(--color-primary); font-weight: 600; margin-bottom: 8px; }
.lab-exclusive-badge {
  display: inline-block; padding: 6px 18px; border-radius: 50px; font-size: 13px; font-weight: 700;
  background: linear-gradient(135deg, #FDD22B 0%, #D4A017 100%); color: var(--color-primary);
  letter-spacing: 0.5px; margin-bottom: 12px; line-height: 1.4;
  box-shadow: 0 2px 8px rgba(253,210,43,0.3);
}
.lab-name { font-size: 26px; font-weight: 800; margin-bottom: 8px; line-height: 1.3; }
.lab-name .title-location { display: block; font-size: 18px; font-weight: 600; color: var(--color-primary); margin-bottom: 4px; }
.lab-theme { font-size: 16px; color: var(--color-text-light); margin-bottom: 24px; font-weight: 500; }
.lab-topics h4 { font-size: 14px; font-weight: 700; color: var(--color-primary); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.lab-topics ul { padding-left: 0; display: flex; flex-direction: column; gap: 10px; }
.lab-topics li {
  padding: 14px 16px; padding-left: 44px; position: relative; font-size: 14px; line-height: 1.6;
  color: var(--color-text); border-bottom: none; border-radius: 10px;
  background: var(--color-bg-light); border: 1px solid #edf2f7;
  transition: all 0.3s ease;
}
.lab-topics li:hover { border-color: var(--color-primary-100); background: var(--color-white); }
.lab-topics li:last-child { border-bottom: none; }
.lab-topics li:nth-child(1)::before {
  content: '\1F331'; position: absolute; left: 14px; top: 14px; font-size: 16px;
  width: auto; height: auto; border-radius: 0; background: none;
}
.lab-topics li:nth-child(2)::before {
  content: '\1F52C'; position: absolute; left: 14px; top: 14px; font-size: 16px;
  width: auto; height: auto; border-radius: 0; background: none;
}
.lab-topics li:nth-child(3)::before {
  content: '\1F4DD'; position: absolute; left: 14px; top: 14px; font-size: 16px;
  width: auto; height: auto; border-radius: 0; background: none;
}
.lab-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.lab-tag {
  padding: 6px 14px; border-radius: 50px; font-size: 13px; font-weight: 500;
  background: rgba(0,50,150,0.08); color: var(--color-primary); border: 1px solid rgba(0,50,150,0.2);
}

/* ========================================
   TIMELINE (Schedule)
   ======================================== */
.timeline { position: relative; max-width: 960px; margin: 0 auto; }
.timeline::before {
  content: ''; position: absolute; left: 32px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(180deg, var(--color-primary-light), var(--color-primary), var(--color-primary-light));
  box-shadow: 0 0 15px rgba(0,50,150,0.15);
}
.timeline-item { display: flex; gap: 32px; margin-bottom: 40px; position: relative; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-marker {
  flex-shrink: 0; width: 64px; height: 64px; border-radius: 50%;
  background: var(--color-white); border: 3px solid var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px; font-weight: 800; color: var(--color-primary);
  font-family: var(--font-en); z-index: 1; transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.timeline-marker:hover {
  transform: scale(1.15);
  box-shadow: 0 0 0 6px rgba(0,50,150,0.1);
}
.timeline-item.is-visible .timeline-marker {
  background: var(--color-primary); color: var(--color-white);
  box-shadow: 0 4px 16px rgba(0,50,150,0.2);
}
.timeline-content {
  flex: 1; padding: 20px 28px; border-radius: var(--radius-sm);
  background: var(--color-bg-light); border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
  display: grid; grid-template-columns: 1fr 160px; grid-template-rows: auto auto auto 1fr; gap: 0 20px;
}
.timeline-content .timeline-phase { grid-column: 1; }
.timeline-content .timeline-icon { grid-column: 1; }
.timeline-content h3 { grid-column: 1; }
.timeline-content p { grid-column: 1; }
.timeline-img {
  grid-column: 2; grid-row: 1 / -1;
  border-radius: 10px; overflow: hidden; align-self: center;
}
.timeline-img img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  border-radius: 10px; transition: transform 0.5s ease;
}
.timeline-item:hover .timeline-img img { transform: scale(1.05); }
.timeline-item:hover .timeline-content { box-shadow: 0 4px 20px rgba(0,50,150,0.08); border-color: var(--color-primary-light); }
.timeline-phase {
  font-size: 12px; font-weight: 700; color: var(--color-primary); text-transform: uppercase;
  letter-spacing: 1px; margin-bottom: 4px;
}
.timeline-icon {
  font-size: 32px; line-height: 1; margin-bottom: 8px;
}
.timeline-icon img {
  width: 48px; height: 48px; object-fit: contain; display: block;
}
.timeline-content h3 { font-size: 20px; font-weight: 700; margin-bottom: 8px; }
.timeline-content p { font-size: 15px; color: var(--color-text-light); line-height: 1.7; }

/* ========================================
   DELIVERABLES
   ======================================== */
.deliverables-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.deliverable-card {
  padding: 36px 32px; border-radius: var(--radius);
  background: rgba(255,255,255,0.06); backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.1);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); position: relative;
  overflow: hidden;
}
.deliverable-card::after {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--color-primary-light), var(--color-bg-dark));
  opacity: 0; transition: opacity 0.4s ease;
}
.deliverable-card:hover::after { opacity: 1; }
.deliverable-card:hover { transform: translateY(-8px); border-color: rgba(253,210,43,0.3); background: rgba(255,255,255,0.1); box-shadow: 0 16px 48px rgba(0,0,0,0.15); }
.deliverable-card:nth-child(1) { border-left: 3px solid rgba(0,132,255,0.4); }
.deliverable-card:nth-child(2) { border-left: 3px solid rgba(253,210,43,0.4); }
.deliverable-card:nth-child(3) { border-left: 3px solid rgba(79,209,197,0.4); }
.deliverable-card:nth-child(4) { border-left: 3px solid rgba(240,147,251,0.4); }
.deliverable-card .section-number {
  color: var(--color-white);
  opacity: 0.03;
  top: -10px;
  left: 10px;
}
.deliverable-num {
  position: absolute; top: 20px; right: 24px;
  font-size: 48px; font-weight: 800; font-family: var(--font-en);
  color: rgba(255,255,255,0.06); line-height: 1;
}
.deliverable-icon {
  width: 52px; height: 52px; margin-bottom: 20px;
  background: rgba(255,255,255,0.08); border-radius: 14px; padding: 10px;
  transition: transform 0.3s ease, background 0.3s ease;
}
.deliverable-card:nth-child(1) .deliverable-icon { color: #60a5fa; }
.deliverable-card:nth-child(2) .deliverable-icon { color: var(--color-accent); }
.deliverable-card:nth-child(3) .deliverable-icon { color: #4fd1c5; }
.deliverable-card:nth-child(4) .deliverable-icon { color: #f093fb; }
.deliverable-card:hover .deliverable-icon { transform: scale(1.1) rotate(-3deg); background: rgba(255,255,255,0.12); }
.deliverable-icon svg { width: 100%; height: 100%; }
.deliverable-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 12px; color: #ffffff; }
.deliverable-card p { font-size: 15px; color: rgba(255,255,255,0.95); line-height: 1.7; margin-bottom: 16px; }
.deliverable-value {
  font-size: 13px; color: var(--color-accent); font-weight: 500;
  padding: 8px 16px; border-radius: 50px; display: inline-block;
  background: rgba(253,210,43,0.1); border: 1px solid rgba(253,210,43,0.2);
}

/* Deliverable tags */
.deliverable-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 16px;
}
.deliverable-tag {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 50px;
  background: rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.95);
  border: 1px solid rgba(255,255,255,0.3);
}

/* Showcase card with 4-grid images */
.deliverable-showcase {
  display: flex;
  flex-direction: column;
}
.deliverable-showcase .deliverable-desc {
  margin-bottom: 20px;
}
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: auto;
}
.showcase-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  aspect-ratio: 1;
  background: rgba(255,255,255,0.08);
  transition: transform 0.3s ease;
}
.showcase-item:hover {
  transform: scale(1.05);
}
.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.showcase-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 6px 8px;
  background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  text-align: center;
}

/* Card with top image */
.deliverable-card-with-image {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
  border-radius: var(--radius); /* 卡片整体圆角 */
}
.deliverable-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
  border-radius: 0 0 var(--radius) var(--radius); /* 图片底部圆角 */
}
.deliverable-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}
.deliverable-card-with-image:hover .deliverable-card-image img {
  transform: scale(1.08);
}
.deliverable-card-content {
  padding: 24px 28px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

/* White background deliverable cards for light sections */
.deliverable-card-light {
  background: var(--color-white);
  border: 1px solid #e2e8f0;
  box-shadow: 0 4px 20px rgba(0,50,150,0.08);
}
.deliverable-card-light::after {
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
}
.deliverable-card-light:hover {
  border-color: rgba(253,210,43,0.3);
  box-shadow: 0 16px 48px rgba(0,50,150,0.12);
}
.deliverable-card-light .deliverable-icon {
  background: rgba(0,50,150,0.08);
}
.deliverable-card-light:hover .deliverable-icon {
  background: rgba(0,50,150,0.12);
}
.deliverable-card-light h3 {
  color: var(--color-text);
}
.deliverable-card-light p {
  color: var(--color-text-light);
}
.deliverable-card-light .deliverable-tag {
  background: rgba(0,50,150,0.06);
  color: var(--color-primary);
  border: 1px solid rgba(0,50,150,0.12);
}

/* ========================================
   WILDER
   ======================================== */
.wilder-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.wilder-chart { display: flex; justify-content: center; }
.wilder-hexagon { width: 100%; max-width: 400px; }
.hex-grid { fill: none; stroke: #e2e8f0; stroke-width: 1; }
.hex-grid.inner { stroke: #edf2f7; }
.hex-grid.inner2 { stroke: #f7fafc; }
.hex-value {
  fill: rgba(0,50,150,0.12); stroke: var(--color-primary); stroke-width: 2.5;
  stroke-linejoin: round; transition: all 1s ease;
}
.hex-label { font-size: 13px; fill: var(--color-text); font-weight: 600; font-family: 'Noto Sans SC', sans-serif; }
.hex-dot { fill: var(--color-primary); transition: all 0.6s ease; }

/* WILDER六边形维度颜色 */
.hex-dimension-w { fill: rgba(0,50,150,0.2); }
.hex-dimension-i { fill: rgba(0,16,33,0.2); }
.hex-dimension-l { fill: rgba(240,147,251,0.25); }
.hex-dimension-d { fill: rgba(253,210,43,0.25); }
.hex-dimension-e { fill: rgba(79,209,197,0.25); }
.hex-dimension-r { fill: rgba(252,129,129,0.25); }

.wilder-list { display: flex; flex-direction: column; gap: 20px; }
.wilder-item { display: flex; gap: 16px; align-items: flex-start; }
.wilder-letter {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-en); font-weight: 800; font-size: 20px;
  color: var(--color-white); background: var(--c, var(--color-primary));
}
.wilder-item h4 { font-size: 17px; font-weight: 700; margin-bottom: 4px; font-family: var(--font-en); }
.wilder-cn { font-family: var(--font-main); font-weight: 600; color: var(--color-text-light); margin-left: 8px; font-size: 15px; }
.wilder-item p { font-size: 14px; color: var(--color-text-light); line-height: 1.6; }

/* ========================================
   TEAM
   ======================================== */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card {
  text-align: center; padding: 40px 32px; border-radius: var(--radius);
  background: var(--color-white); border: 1px solid #e2e8f0; transition: all var(--transition);
}
.team-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.team-avatar {
  width: 96px; height: 96px; margin: 0 auto 16px;
  border-radius: 50%; overflow: hidden; display: flex; align-items: center; justify-content: center;
  transition: transform 0.3s ease;
}
.team-card:hover .team-avatar { transform: scale(1.08); }
.team-avatar-bordered {
  border: 3px solid var(--color-accent);
  border-radius: 50%;
}
.team-avatar img { width: 100%; height: 100%; object-fit: cover; border-radius: 50%; }
.team-avatar svg { width: 80px; height: 80px; }
.team-card h4 { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.team-title { font-size: 14px; color: var(--color-primary); font-weight: 600; margin-bottom: 12px; }
.team-desc { font-size: 14px; color: var(--color-text-light); line-height: 1.7; }

/* ========================================
   SAFETY
   ======================================== */
.safety-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.safety-item {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius);
  background: var(--color-white);
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}
.safety-item:hover { transform: translateY(-4px); box-shadow: 0 8px 24px rgba(0,50,150,0.08); }
.safety-icon {
  width: 64px; height: 64px; margin: 0 auto 16px; color: var(--color-primary);
  background: var(--color-primary-50); border-radius: 16px; padding: 14px;
}
.safety-icon svg { width: 100%; height: 100%; }
.safety-item h4 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.safety-item p { font-size: 14px; color: var(--color-text-light); line-height: 1.7; }

/* ========================================
   PRICING
   ======================================== */
.pricing-content { text-align: center; max-width: 680px; margin: 0 auto; }
.pricing-title { font-size: 42px; font-weight: 800; margin-bottom: 12px; }
.pricing-subtitle { font-size: 18px; opacity: 0.85; margin-bottom: 40px; }
.pricing-box {
  background: rgba(255,255,255,0.08); backdrop-filter: blur(16px);
  border: 2px solid rgba(253,210,43,0.3); border-radius: var(--radius);
  padding: 48px 40px; margin-bottom: 32px;
  box-shadow: 0 0 40px rgba(253,210,43,0.12), 0 8px 32px rgba(0,0,0,0.2), inset 0 0 80px rgba(253,210,43,0.03);
}
.pricing-amount { margin-bottom: 20px; display: flex; align-items: baseline; justify-content: center; gap: 4px; }
.pricing-currency { font-size: 28px; font-weight: 600; }
.pricing-number { font-size: 56px; font-weight: 900; font-family: var(--font-en); }
.pricing-separator { font-size: 28px; font-weight: 300; margin: 0 8px; }
.pricing-unit { font-size: 18px; opacity: 0.8; margin-left: 8px; }
.pricing-badges { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.pricing-badge {
  padding: 6px 16px; border-radius: 50px; font-size: 13px; font-weight: 500;
  background: rgba(253,210,43,0.2); border: 1px solid rgba(253,210,43,0.4); color: var(--color-accent);
}
.pricing-actions { margin-bottom: 40px; }
.pricing-contact { display: flex; gap: 32px; align-items: center; justify-content: center; }
.qr-placeholder {
  width: 140px; height: 140px; border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.15); border: 1px dashed rgba(255,255,255,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; opacity: 0.7;
}
.pricing-info { text-align: left; }
.pricing-info p { font-size: 15px; margin-bottom: 6px; }
.pricing-info strong { font-size: 20px; }
.pricing-hint { font-size: 14px; opacity: 0.7; margin-top: 8px !important; }

/* Urgency Banner */
.urgency-banner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 28px;
  background: linear-gradient(135deg, rgba(253,210,43,0.1) 0%, rgba(212,160,23,0.08) 100%);
  border: 1px solid rgba(253,210,43,0.3);
  border-radius: 12px;
  margin-top: 24px;
}
.urgency-banner .urgency-icon {
  font-size: 28px;
  flex-shrink: 0;
}
.urgency-banner h4 {
  color: var(--color-accent);
  font-size: 16px;
  margin-bottom: 4px;
}
.urgency-banner p {
  color: rgba(255,255,255,0.8);
  font-size: 14px;
  margin: 0;
}
.urgency-banner .urgency-highlight {
  color: #FDD22B;
  font-weight: 700;
}

/* ========================================
   FAQ
   ======================================== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  margin-bottom: 12px; border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid #e2e8f0; background: var(--color-white);
  transition: all 0.3s ease;
}
.faq-item:hover { border-color: #cbd5e0; }
.faq-item.open { border-color: var(--color-primary-light); box-shadow: 0 4px 20px rgba(0,50,150,0.08); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 22px 24px; font-size: 16px; font-weight: 600; text-align: left;
  color: var(--color-text); transition: color 0.3s ease;
}
.faq-item.open .faq-question { color: var(--color-primary); }
.faq-arrow { width: 20px; height: 20px; flex-shrink: 0; color: var(--color-text-light); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); }
.faq-item.open .faq-arrow { transform: rotate(180deg); color: var(--color-primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; }
.faq-answer p { padding: 0 24px 20px; font-size: 15px; color: #4a5568; line-height: 1.8; }

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background: #001021;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(0,50,150,0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(253,210,43,0.02) 0%, transparent 50%);
  position: relative;
  overflow: hidden;
  color: rgba(255,255,255,0.7);
  padding: 60px 0 32px;
}
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 32px; margin-bottom: 40px; }
.footer-links-row { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 32px; }
.footer-links-row a { font-size: 14px; color: rgba(255,255,255,0.7); transition: color var(--transition); }
.footer-links-row a:hover { color: var(--color-accent); }
.footer-logo { display: flex; align-items: center; gap: 10px; }
.footer-logo img { height: 56px; width: auto; object-fit: contain; display: block; }
.footer-links h4, .footer-contact h4 { font-size: 15px; font-weight: 600; color: var(--color-white); margin-bottom: 16px; }
.footer-links a { display: block; font-size: 14px; padding: 4px 0; transition: color var(--transition); }
.footer-links a:hover { color: var(--color-accent); }
.footer-contact a:hover { color: var(--color-accent); }
.footer-contact p { font-size: 14px; margin-bottom: 8px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 24px; text-align: center; }
.footer-bottom p { font-size: 13px; opacity: 0.4; }

/* ========================================
   MOBILE FLOAT CTA
   ======================================== */
.mobile-float-cta {
  display: none; position: fixed; bottom: 0; left: 0; right: 0; z-index: 998;
  padding: 12px 16px; background: rgba(0,16,33,0.95); backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,0.08);
}

/* ========================================
   SCROLL ANIMATIONS
   ======================================== */
.animate-on-scroll { opacity: 0; transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up { transform: translateY(30px); }
.fade-in { transform: none; }
.scale-in { transform: scale(0.95); }
.animate-on-scroll.is-visible { opacity: 1; transform: translateY(0) scale(1); }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (min-width: 1440px) {
  .container { max-width: 1320px; }
}

@media (max-width: 1024px) {
  .section { padding: 80px 0; }
  .section-title { font-size: 34px; }
  .hero-title { font-size: 56px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .features-grid .feature-card:last-child { grid-column: 1 / -1; max-width: 400px; margin: 0 auto; }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .safety-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-inner > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  :root { --nav-height: 64px; }
  .container { padding: 0 16px; }
  .section { padding: 64px 0; }
  .section-header { margin-bottom: 40px; }
  .section-title { font-size: 26px; line-height: 1.3; }
  .section-desc { font-size: 15px; line-height: 1.7; }
  
  .hero { min-height: 100vh; padding-top: calc(var(--nav-height) + 60px); }
  .hero-title { font-size: 36px; line-height: 1.2; letter-spacing: 0; }
  .hero-subtitle { font-size: 18px; line-height: 1.6; }
  .hero-badge { font-size: 12px; padding: 6px 14px; }
  .hero-tags { gap: 8px; }
  .hero-tag { font-size: 12px; padding: 6px 12px; }
  .hero-actions { flex-direction: column; align-items: center; gap: 12px; }
  .btn-lg { width: 100%; max-width: 100%; }

  .nav-links, .nav-cta { display: none; }
  .nav-hamburger { display: flex; width: 44px; height: 44px; padding: 10px; }
  .nav-hamburger span { height: 3px; }

  .features-grid { grid-template-columns: 1fr; }
  .features-grid .feature-card:last-child { max-width: none; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 20px; }
  .stat-number { font-size: 32px; }
  .stat-label { font-size: 13px; }

  .lab-tabs { gap: 6px; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .lab-tab { padding: 10px 14px; white-space: nowrap; }
  .lab-tab-name { font-size: 13px; }
  .lab-panel-inner { grid-template-columns: 1fr; }
  .lab-image img { height: 220px; object-fit: cover; }
  .lab-content { padding: 20px 16px; }
  .lab-content h3 { font-size: 18px; line-height: 1.4; }
  .lab-content p { font-size: 14px; line-height: 1.7; }

  .timeline::before { left: 19px; }
  .timeline-marker { width: 40px; height: 40px; font-size: 15px; }
  .timeline-item { gap: 16px; }
  .timeline-content { padding: 14px 16px; grid-template-columns: 1fr; }
  .timeline-img { display: none; }
  .timeline-content h3 { font-size: 16px; line-height: 1.4; }
  .timeline-content p { font-size: 14px; line-height: 1.6; }

  .deliverables-grid { grid-template-columns: 1fr; gap: 16px; }

  .wilder-layout { grid-template-columns: 1fr; gap: 40px; }
  .wilder-hexagon { max-width: 280px; margin: 0 auto; }
  .wilder-dimension { padding: 14px; }
  .wilder-dimension h4 { font-size: 15px; }
  .wilder-dimension p { font-size: 13px; }

  .team-grid { grid-template-columns: 1fr; max-width: 100%; }
  .safety-grid { grid-template-columns: 1fr; }
  .safety-item { padding: 24px 16px; }
  .wilder-item { padding: 8px 12px; }

  .pricing-number { font-size: 36px; }
  .pricing-contact { flex-direction: column; align-items: center; text-align: center; }
  .qr-placeholder { width: 120px; height: 120px; }
  .pricing-info { text-align: center; }
  .pricing-info strong { font-size: 18px; }

  .faq-question { padding: 16px 18px; font-size: 15px; }
  .faq-answer p { padding: 0 18px 16px; font-size: 14px; line-height: 1.7; }

  .footer-inner { grid-template-columns: 1fr; gap: 32px; text-align: center; }
  .footer-logo { justify-content: center; }

  .mobile-float-cta { display: block; }
  .footer { padding-bottom: 80px; }
  
  /* 优化卡片内边距 */
  .topic-card, .policy-card, .comp-card { padding: 20px 16px; }
}

@media (max-width: 640px) {
  .section-title { font-size: 28px; }
  .hero-title { font-size: 32px; }
  .btn { padding: 12px 24px; font-size: 15px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-subtitle { font-size: 16px; }
  .section-title { font-size: 22px; }
  .section-desc { font-size: 14px; }
  
  .lab-tabs { flex-direction: column; align-items: stretch; }
  .lab-tab { flex-direction: row; justify-content: center; border-radius: var(--radius-sm); }
  .lab-tab-name { font-size: 13px; }
  
  .stats-row { grid-template-columns: 1fr 1fr; gap: 12px; padding: 16px; }
  .stat-number { font-size: 24px; }
  .stat-label { font-size: 12px; }
  
  .timeline-marker { width: 36px; height: 36px; font-size: 14px; }
  .timeline-content { padding: 12px 14px; grid-template-columns: 1fr; }
  .timeline-content h3 { font-size: 15px; }
  .timeline-content p { font-size: 13px; }
  
  .safety-grid { grid-template-columns: 1fr; }
  
  .btn-xl { padding: 16px 32px; font-size: 16px; }
  
  /* 进一步优化极小屏幕的字体 */
  body { font-size: 14px; }
  p, li { font-size: 14px; line-height: 1.7; }
  h1, h2, h3, h4 { line-height: 1.3; }
}

@media (max-width: 360px) {
  .section { padding: 48px 0; }
  .container { padding: 0 12px; }
  .section-title { font-size: 20px; }
  .hero-title { font-size: 28px; }
}

/* ========================================
   IMPACT GALLERY
   ======================================== */
.impact-gallery { padding: 100px 0; }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: 200px 200px;
  gap: 12px;
}
.gallery-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}
.gallery-item.gallery-large {
  grid-column: 1 / 3;
  grid-row: 1 / 3;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1), filter 0.6s ease;
  filter: brightness(0.92);
}
.gallery-item:hover img {
  transform: scale(1.06);
  filter: brightness(1);
}
.gallery-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 20px;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 100%);
  opacity: 0;
  transition: opacity 0.4s ease;
}
.gallery-item:hover .gallery-overlay { opacity: 0; }
.gallery-label {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.gallery-item:not(.gallery-large) {
  aspect-ratio: auto;
}

/* ---- Full-width photo divider ---- */
.photo-divider {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
}
.photo-divider img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.photo-divider-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,50,150,0.7) 0%, rgba(0,32,112,0.6) 40%, rgba(0,16,33,0.8) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 40px;
}
.photo-divider-text {
  color: #fff;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: 1px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
  max-width: 800px;
  line-height: 1.4;
}
.photo-divider-text span {
  display: block;
  font-size: 18px;
  font-weight: 400;
  margin-top: 12px;
  opacity: 0.85;
}

/* ---- Gallery responsive ---- */
@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }
  .gallery-item.gallery-large {
    grid-column: 1 / 3;
    grid-row: auto;
  }
  .gallery-item:not(.gallery-large) {
    aspect-ratio: 3/2;
  }
  .gallery-overlay { opacity: 1; }
  .photo-divider { height: 260px; }
  .photo-divider-text { font-size: 24px; }
  .photo-divider-text span { font-size: 14px; }
}
@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  .gallery-item.gallery-large {
    grid-column: auto;
  }
  .photo-divider { height: 200px; }
  .photo-divider-text { font-size: 20px; }
}

/* ========================================
   动画系统
   ======================================== */
/* 滑入动画 */
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-60px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(60px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slideInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 缩放弹入 */
@keyframes scaleIn {
  0% { opacity: 0; transform: scale(0.5); }
  70% { transform: scale(1.05); }
  100% { opacity: 1; transform: scale(1); }
}

/* 悬浮呼吸效果 */
@keyframes floatGentle {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* 微光闪烁 */
@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

/* 脉冲效果 */
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.08); opacity: 0.85; }
}

/* 动画工具类 */
.animate-slide-left { animation: slideInLeft 0.6s ease both; }
.animate-slide-right { animation: slideInRight 0.6s ease both; }
.animate-slide-up { animation: slideInUp 0.6s ease both; }
.animate-scale-in { animation: scaleIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1) both; }
.animate-float { animation: floatGentle 2.5s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }

/* 交错延迟（子元素依次入场） */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* ========================================
   装饰性视觉元素
   ======================================== */
/* 章节装饰线 - 标题下方的品牌线条 */
.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-bg-dark));
  margin: 16px 0 0;
  border-radius: 2px;
}

/* 章节大号背景编号 */
.section-number {
  position: absolute;
  top: -20px;
  left: 20px;
  font-family: var(--font-en);
  font-size: 120px;
  font-weight: 800;
  color: var(--color-primary);
  opacity: 0.04;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

/* 科学笔记本网格纹理背景 */
.bg-notebook {
  background-image: 
    linear-gradient(rgba(0,50,150,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,50,150,0.03) 1px, transparent 1px);
  background-size: 24px 24px;
}

/* 引号装饰（用于品牌理念/评价区域）*/
.quote-decoration::before {
  content: '\201C';
  position: absolute;
  top: -10px;
  left: -5px;
  font-family: Georgia, serif;
  font-size: 80px;
  color: var(--color-accent);
  opacity: 0.2;
  line-height: 1;
  pointer-events: none;
}

/* 品牌色波浪分隔线 */
.wave-divider {
  position: relative;
  height: 40px;
  overflow: hidden;
}
.wave-divider::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 40px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 40'%3E%3Cpath fill='%23001021' d='M0,20 C360,40 720,0 1080,20 C1260,30 1380,25 1440,20 L1440,40 L0,40 Z'/%3E%3C/svg%3E") no-repeat center;
  background-size: cover;
}

/* ========================================
   组件增强
   ======================================== */
/* 卡片顶部渐变条装饰 */
.card-decorated {
  position: relative;
  overflow: hidden;
}
.card-decorated::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light), var(--color-bg-dark));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.card-decorated:hover::before {
  transform: scaleX(1);
}

/* 胶囊形徽章 */
.badge-capsule {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.badge-capsule-primary {
  background: var(--color-primary-50);
  color: var(--color-primary);
}
.badge-capsule-accent {
  background: var(--color-accent-50);
  color: var(--color-accent-dark);
}

/* 图片容器品牌色边框 */
.img-branded {
  border-radius: var(--radius);
  border: 3px solid transparent;
  background-clip: padding-box;
  position: relative;
  overflow: hidden;
  transition: all 0.4s ease;
}
.img-branded:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 20px rgba(253,210,43,0.2);
}

/* 图片hover缩放+信息浮层 */
.img-hover-zoom {
  overflow: hidden;
  border-radius: var(--radius);
  position: relative;
}
.img-hover-zoom img {
  transition: transform 0.6s ease;
}
.img-hover-zoom:hover img {
  transform: scale(1.08);
}
.img-hover-zoom .img-overlay {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  display: flex;
  align-items: flex-end;
  padding: 16px;
  background: linear-gradient(transparent 0%, rgba(0,21,66,0.7) 100%);
  opacity: 1;
  transition: opacity 0.4s ease;
}
.img-hover-zoom .img-overlay span {
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 4px rgba(0,0,0,0.5);
}
.img-hover-zoom.gallery-large .img-overlay span {
  font-size: 16px;
}
.img-hover-zoom:hover .img-overlay {
  opacity: 1;
}

/* 竞赛对标表格偶数行高亮 */
.competition-table tr:nth-child(even),
.competition-row:nth-child(even) {
  background: var(--color-primary-50);
}

/* 竞赛对标表格偶数行高亮 */
.competition-table tr:nth-child(even),
.competition-row:nth-child(even) {
  background: var(--color-primary-50);
}

/* 统计数字增强 */
.stat-number-enhanced {
  font-family: var(--font-en);
  font-weight: 800;
  font-size: 48px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-decoration));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 闪光效果（用于推荐标签等） */
.shimmer-effect {
  position: relative;
  overflow: hidden;
}
.shimmer-effect::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 3s ease-in-out infinite;
}

/* ========================================
   排版工具类
   ======================================== */
/* 品牌黄高亮文字 */
.text-highlight {
  background: linear-gradient(transparent 60%, var(--color-accent-light) 60%);
  padding: 0 4px;
}

/* 品牌色列表圆点 */
.list-branded li::marker {
  color: var(--color-primary);
}
.list-branded li {
  padding-left: 8px;
  margin-bottom: 12px;
}

/* ========================================
   动态降级 - prefers-reduced-motion
   ======================================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .hero-scroll-hint {
    animation: none !important;
    display: none;
  }
  .animate-on-scroll,
  .animate-float,
  .animate-pulse {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
  }
  .star {
    animation: none !important;
    opacity: 0.4 !important;
  }
}

/* ========================================
   LAB资源折叠区域样式
   ======================================== */
.lab-resource-section {
  background: linear-gradient(135deg, rgba(0,50,150,0.06) 0%, rgba(253,210,43,0.04) 100%);
  border: 1px solid rgba(0,50,150,0.1);
  border-radius: 12px;
  padding: 16px 20px;
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.lab-resource-section .lab-resource-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.lab-resource-section.expanded .lab-resource-content {
  max-height: 500px;
}
.lab-resource-title {
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.5px;
  margin-bottom: 0;
}
.lab-resource-section.expanded .lab-resource-title {
  margin-bottom: 12px;
}
.lab-resource-title .toggle-icon {
  color: var(--color-white);
  background: var(--color-primary);
  width: 22px; height: 22px;
  border-radius: 50%;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 10px;
  transition: all 0.3s ease;
}
.lab-resource-section.expanded .toggle-icon {
  transform: rotate(180deg);
  background: var(--color-accent);
  color: var(--color-primary);
}

/* 营期探究问题容器样式 */
.lab-inquiry-section {
  background: linear-gradient(135deg, rgba(253,210,43,0.06) 0%, rgba(0,50,150,0.04) 100%);
  border: 1px solid rgba(0,50,150,0.1);
  border-radius: 12px;
  padding: 20px;
  margin-top: 16px;
}
.lab-inquiry-section h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  margin-top: 0;
}
.lab-inquiry-section p {
  margin-bottom: 8px;
}
.lab-inquiry-section ul {
  padding-left: 20px;
  margin-top: 8px;
}

/* ========================================
   竞赛卡片样式
   ======================================== */
.competition-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 32px;
}
.competition-card {
  background: var(--color-white);
  border-radius: 12px;
  padding: 28px;
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}
.competition-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,50,150,0.1);
}
.competition-grade {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  padding: 6px 16px;
  background: rgba(0,50,150,0.08);
  border-radius: 20px;
  display: inline-block;
  margin-bottom: 16px;
}
.competition-list {
  list-style: none;
  padding: 0;
}
.competition-list li {
  padding: 8px 0;
  border-bottom: 1px solid #f0f0f0;
  color: #2d3748;
  font-size: 14px;
}
.competition-list li:last-child {
  border-bottom: none;
}

/* ========================================
   安全数字增强样式
   ======================================== */
.safety-number {
  font-size: 42px;
  font-weight: 800;
  font-family: var(--font-en);
  color: var(--color-primary);
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========================================
   品牌色增强 - 米白/浅木/自然主题
   ======================================== */

/* 米白色交替section背景 */
.section-cream {
  background: var(--color-bg-light);
}

/* 浅木色自然装饰 */
.wood-accent {
  border-left: 4px solid var(--color-wood);
  padding-left: 12px;
}

/* 自然主题卡片 */
.nature-card {
  background: linear-gradient(135deg, rgba(209,182,145,0.08), rgba(250,249,246,1));
  border: 1px solid rgba(209,182,145,0.15);
}

/* ========================================
   Results 路径指引线
   ======================================== */
.results-pathway {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}
.results-step {
  position: relative;
  padding: 0 16px;
}
.results-step-circle {
  width: 64px; height: 64px; border-radius: 50%;
  background: linear-gradient(135deg, #003296, #001021);
  color: #fff; display: flex; align-items: center; justify-content: center;
  font-size: 24px; font-weight: 800; font-family: var(--font-en);
  margin: 0 auto 12px;
  position: relative; z-index: 2;
  transition: all 0.3s ease;
}
.results-step:last-child .results-step-circle {
  background: linear-gradient(135deg, #FDD22B, #D4A017);
}
.results-step:hover .results-step-circle {
  transform: scale(1.1);
  box-shadow: 0 4px 20px rgba(0,50,150,0.25);
}
.results-step h4 {
  font-size: 16px; color: #2d3748; margin-bottom: 6px; font-weight: 700;
}
.results-step p {
  font-size: 13px; color: #9CA3AF; line-height: 1.5;
}
/* 连接线：浅色虚线 */
.results-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(50% + 40px);
  right: calc(-50% + 40px);
  height: 0;
  border-top: 2px dashed rgba(0,50,150,0.2);
  z-index: 1;
}
/* 去掉箭头，改为小圆点终端 */
.results-step:not(:last-child)::before {
  content: '';
  position: absolute;
  top: 29px;
  right: calc(-50% + 36px);
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(0,50,150,0.25);
  z-index: 2;
}
/* 响应式：小屏竖排 */
@media (max-width: 768px) {
  .results-pathway {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .results-step:not(:last-child)::after {
    top: auto; left: 50%;
    bottom: -15px;
    width: 0; height: 18px;
    right: auto;
    transform: translateX(-50%);
    border-top: none;
    border-left: 2px dashed rgba(0,50,150,0.2);
  }
  .results-step:not(:last-child)::before {
    top: auto; right: auto;
    bottom: -20px; left: 50%;
    transform: translateX(-50%);
    width: 6px; height: 6px;
    border-radius: 50%;
    background: rgba(0,50,150,0.25);
    border: none;
    border-bottom: none;
  }
}

/* Section Tag 胶囊 */
.section-tag {
  display: inline-block;
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  background: rgba(0,50,150,0.08);
  color: var(--color-primary);
  border: 1px solid rgba(0,50,150,0.15);
  margin-bottom: 16px;
}

/* ========================================
   Pricing 费用包含网格
   ======================================== */
.pricing-includes-grid {
  margin: 24px 0;
  padding: 20px 24px;
  background: rgba(255,255,255,0.05);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.08);
  text-align: left;
}
.pricing-includes-title {
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 14px;
  text-transform: uppercase;
}
.pricing-includes-list {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 20px;
}
.pricing-includes-list li {
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  padding-left: 22px;
  position: relative;
  line-height: 1.5;
}
.pricing-includes-list li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* ========================================
   UX 修复补丁
   ======================================== */

/* #13 Skip Navigation 跳过导航链接 */
.skip-nav {
  position: absolute;
  top: -100%;
  left: 16px;
  z-index: 10000;
  padding: 12px 24px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 0 0 8px 8px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.2s ease;
}
.skip-nav:focus {
  top: 0;
}

/* #14 焦点样式 - focus-visible */
:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}
.nav-link:focus-visible,
.btn:focus-visible,
.lab-tab:focus-visible,
.faq-question:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 2px;
}
/* 深色背景区域焦点 */
.section-dark :focus-visible,
.section-gradient :focus-visible,
.hero :focus-visible {
  outline-color: var(--color-accent);
}

/* #16 颜色对比度修复 - WCAG AA 合规 */
.section-desc { color: #4b5563; }
.section-desc.light { color: rgba(255,255,255,0.85); }
.feature-card p { color: #4b5563; }
.timeline-content p { color: #4b5563; }
.team-desc { color: #4b5563; }
.safety-item p { color: #4b5563; }
.wilder-item p { color: #4b5563; }
.wilder-cn { color: #4b5563; }
.stat-label { opacity: 0.9; }
.results-step p { color: #6B7280; }

/* #12 移除 gallery 死代码中的错误 hover */
.gallery-overlay { display: none; }

/* #19 修复 feature-card 装饰伪元素重叠 */
.feature-card::after { display: none; }

/* #22 内联样式迁移 - schedule 按钮 */
.schedule-cta {
  text-align: center;
  margin-top: 40px;
}
.btn-schedule-detail {
  display: inline-block;
  padding: 14px 36px;
  background: linear-gradient(135deg, #003296, #001021);
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  transition: all 0.3s ease;
}
.btn-schedule-detail:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,50,150,0.25);
}

/* #22 内联样式迁移 - results 路径容器 */
.results-grid-single {
  grid-template-columns: 1fr;
}
.results-pathway-box {
  background: linear-gradient(135deg, #FAF9F6 0%, #edf2f7 100%);
  border-radius: 16px;
  padding: 40px 32px;
  border: 1px solid #e2e8f0;
}

/* #22 内联样式迁移 - 竞赛标题 */
.competition-section-title {
  font-size: 15px;
  color: #2d3748;
  margin-bottom: 16px;
  text-align: center;
  letter-spacing: 2px;
}

/* #22 内联样式迁移 - lab 资源描述文字 */
.lab-resource-content p {
  font-size: 14px;
  color: #4b5563;
  margin-bottom: 12px;
}

/* #23 移动端 Hero 按钮优化 - 不再全宽堆叠 */
@media (max-width: 768px) {
  .hero-actions {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  .hero-actions .btn-lg {
    width: auto;
    max-width: none;
    padding: 14px 28px;
    font-size: 15px;
  }
  .btn-lg {
    width: auto;
    max-width: none;
  }
}

/* #24 Lab Tab 横向滚动视觉提示 */
@media (max-width: 768px) and (min-width: 481px) {
  .lab-tabs {
    position: relative;
    justify-content: flex-start;
    flex-wrap: nowrap;
    -webkit-mask-image: linear-gradient(to right, black 85%, transparent 100%);
    mask-image: linear-gradient(to right, black 85%, transparent 100%);
  }
}

/* #25 团队卡片移动端 2 列 */
@media (max-width: 768px) {
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 100%;
  }
  .team-card {
    padding: 24px 16px;
  }
  .team-avatar {
    width: 72px;
    height: 72px;
  }
  .team-card h4 {
    font-size: 16px;
  }
  .team-desc {
    font-size: 13px;
  }
}

/* #26 悬浮 CTA 增加安全间距 + FAQ 底部保护 */
.mobile-float-cta {
  padding: 12px 16px calc(env(safe-area-inset-bottom, 0px) + 12px);
}
@media (max-width: 768px) {
  .footer { padding-bottom: 100px; }
  #faq { padding-bottom: 80px; }
}

/* gallery section title 白色文字 */
.section-title--light { color: #fff; }

/* ========== Student Works Showcase ========== */
.student-works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}
.student-work-card {
  background: var(--color-white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.student-work-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.12);
}
.student-work-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--color-primary-50);
  display: flex;
  align-items: center;
  justify-content: center;
}
.student-work-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.student-work-info {
  padding: 20px;
}
.student-work-lab {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-50);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 8px;
}
.student-work-info h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 6px;
  line-height: 1.4;
}
.student-work-author {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin: 0 0 8px;
}
.student-work-desc {
  font-size: 0.85rem;
  color: #555;
  line-height: 1.6;
  margin: 0;
}

/* 双图拼接作品卡片样式 */
.student-work-image-dual {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--color-primary-50);
  display: flex;
  gap: 2px;
}
.dual-image-left,
.dual-image-right {
  flex: 1;
  overflow: hidden;
  position: relative;
}
.dual-image-left::after,
.dual-image-right::after {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-white);
  z-index: 1;
}
.dual-image-left::after {
  right: 0;
}
.dual-image-right::after {
  left: 0;
}
.dual-image-left img,
.dual-image-right img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.student-work-card-dual:hover .dual-image-left img {
  transform: scale(1.05);
}
.student-work-card-dual:hover .dual-image-right img {
  transform: scale(1.05);
}

/* 纯图片作品卡片样式（无底部文案） */
.student-work-card.student-work-photo {
  padding: 0;
}
.student-work-card.student-work-photo .student-work-image {
  height: 280px;
  border-radius: 16px;
}
.student-work-card.student-work-photo .student-work-image img {
  border-radius: 16px;
}

/* Region selector active state */
.region-btn.active {
  background: var(--color-white) !important;
  color: var(--color-primary) !important;
  border-color: var(--color-white) !important;
}

/* ========================================
   星空闪烁效果
   ======================================== */
.stars-layer {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  z-index: 2;
  overflow: hidden;
}
.star {
  position: absolute;
  border-radius: 50%;
  background: rgba(253, 210, 43, 0.9);
  animation: starTwinkle var(--star-dur, 3s) ease-in-out infinite alternate both;
  animation-delay: var(--star-del, 0s);
}
.star--gold {
  background: rgba(253, 210, 43, 0.9);
}
@keyframes starTwinkle {
  0%   { opacity: var(--star-lo, 0.15); }
  100% { opacity: var(--star-hi, 0.9); }
}

/* 确保深色区域内容在星点之上 */
.section-dark > .container,
.section-gradient > .container,
.footer > .container,
.footer-bottom,
.recommend-hero > .container {
  position: relative;
  z-index: 3;
}
.photo-divider-overlay {
  z-index: 1;
}
.photo-divider .stars-layer {
  z-index: 2;
}
.photo-divider-text {
  position: relative;
  z-index: 3;
}

@media (max-width: 640px) {
  .student-works-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== Camp Independent Pages ========== */
.camp-hero {
  position: relative;
  height: 600px;
  overflow: hidden;
}
.camp-hero-image {
  position: absolute;
  inset: 0;
}
.camp-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.camp-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,16,33,0.85) 0%, rgba(0,50,150,0.80) 100%);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 180px;
}
.camp-hero-content {
  color: #fff;
  text-align: center;
  max-width: 800px;
}
.camp-hero-content .breadcrumb {
  display: none;
}
.camp-hero-content .breadcrumb:hover {
  color: rgba(255,255,255,0.9);
}
.camp-exclusive-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 50px;
  background: linear-gradient(135deg, #D4AF37, #F5D76E);
  color: #001021;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}
.camp-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 50px;
  background: var(--color-accent);
  color: var(--color-bg-dark);
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.camp-title {
  font-size: 42px;
  font-weight: 900;
  margin-bottom: 16px;
  line-height: 1.2;
}
.camp-title-name {
  font-size: 42px;
  font-weight: 900;
  line-height: 1.2;
}
.camp-theme {
  font-size: 20px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 60px;
}
.camp-location {
  font-size: 16px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 20px;
}
.camp-tags {
  display: flex !important;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center !important;
}
.camp-tag {
  padding: 6px 16px;
  border-radius: 50px;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  font-size: 14px;
  font-weight: 600;
}

/* Camp Intro Grid */
.camp-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 32px;
  align-items: start;
}
.camp-resource-section {
  min-height: 180px;
}
.camp-questions {
  min-height: 280px;
}
.camp-intro-image {
  height: 100%;
}
.camp-intro-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.section-title-center {
  text-align: center;
  margin-bottom: 48px;
}
.section-title-center::after {
  margin-left: auto !important;
  margin-right: auto !important;
}
.camp-intro-text h2 {
  margin-bottom: 24px;
}
/* 营地页面的section-title装饰线居中 */
#intro .section-title::after,
#overview .section-title::after,
#detailed-schedule .section-title::after,
#schedule .section-title::after,
.deliverables-section .section-title::after,
#topics .section-title::after,
/* 首页三个板块的装饰线居中 */
#about .section-title::after,
#labs .section-title::after,
#gallery .section-title::after,
/* 首页更多板块的装饰线居中 */
#student-works .section-title::after,
#results .section-title::after,
#wilder .section-title::after,
#safety .section-title::after,
#team .section-title::after,
/* 课题方案页面的装饰线居中 */
#policy .section-title::after,
#grade-lower .section-title::after,
#grade-upper .section-title::after,
#grade-middle .section-title::after {
  margin-left: auto !important;
  margin-right: auto !important;
}
#intro .section-title,
#overview .section-title,
#detailed-schedule .section-title,
#schedule .section-title,
.deliverables-section .section-title,
#topics .section-title,
/* 首页三个板块的标题居中 */
#about .section-title,
#labs .section-title,
#gallery .section-title,
/* 课题方案页面的标题居中 */
#policy .section-title,
#grade-lower .section-title,
#grade-upper .section-title,
#grade-middle .section-title {
  text-align: center;
}
.camp-resource-section {
  margin-bottom: 32px;
  padding: 20px;
  background: #f7f8fa;
  border-radius: 12px;
  border-left: 4px solid var(--color-primary);
}
.camp-resource-section h4,
.camp-questions h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.camp-resource-content {
  padding: 0;
}
.camp-resource-content p {
  font-size: 15px;
  line-height: 1.8;
  color: #4a5568;
  margin: 0;
}
.camp-questions {
  padding: 20px;
  background: #f7f8fa;
  border-radius: 12px;
  border-left: 4px solid var(--color-primary);
}
.camp-question-content p {
  margin-bottom: 12px;
}
.tier-solutions {
  margin-top: 16px;
}
.tier-item {
  margin-bottom: 12px;
  padding: 12px;
  background: #fff;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
}
.tier-item:last-child {
  margin-bottom: 0;
}
.tier-badge {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: 8px;
}
.tier-lower .tier-badge {
  background: #e3f2fd;
  color: #1976d2;
}
.tier-upper .tier-badge {
  background: #e8f5e9;
  color: #388e3c;
}
.tier-middle .tier-badge {
  background: #fff3e0;
  color: #f57c00;
}
.tier-content {
  font-size: 14px;
  line-height: 1.7;
  color: #4a5568;
}
.camp-intro-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,50,150,0.12);
}
.camp-intro-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* 30-Second Overview */
.overview-timeline {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}
.overview-timeline-card {
  background: var(--color-white);
  border-radius: 12px;
  padding: 20px 16px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0,50,150,0.06);
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}
.overview-timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,50,150,0.12);
}
.overview-day-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), #0056d6);
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
}
.overview-title {
  font-size: 15px;
  font-weight: 700;
  color: #1a202c;
  margin-bottom: 8px;
  line-height: 1.3;
}
.overview-phase {
  font-size: 13px;
  color: #718096;
  margin-bottom: 12px;
}
.overview-wilder {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 700;
}
.wilder-w { background: rgba(253,210,43,0.15); color: #b8860b; }
.wilder-i { background: rgba(0,50,150,0.1); color: #003296; }
.wilder-l { background: rgba(72,187,120,0.15); color: #276749; }
.wilder-d { background: rgba(128,90,213,0.15); color: #553c9a; }
.wilder-e { background: rgba(237,100,166,0.15); color: #97266d; }
.wilder-r { background: rgba(245,101,101,0.15); color: #9b2c2c; }

/* Schedule Days */
.schedule-days {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.schedule-day-card {
  background: var(--color-white);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0,50,150,0.08);
  border: 1px solid #e2e8f0;
}
.schedule-day-header {
  background: linear-gradient(135deg, var(--color-primary), #001021);
  color: #fff;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.schedule-day-num {
  font-size: 18px;
  font-weight: 800;
  font-family: var(--font-en);
}
.schedule-day-phase {
  font-size: 16px;
  font-weight: 600;
}
.schedule-day-content {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
}
.schedule-day-period {
  padding: 20px;
  border-right: 1px solid #e2e8f0;
}
.schedule-day-period:last-child {
  border-right: none;
}
.schedule-period-label {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 4px;
  background: rgba(0,50,150,0.08);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
  margin-bottom: 12px;
}
.schedule-day-period img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 12px;
}
.schedule-day-period p {
  font-size: 14px;
  line-height: 1.7;
  color: #4a5568;
}

/* Camp Topics */
.camp-topics-grid,
.topics-grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}
.topic-card {
  background: var(--color-white);
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,50,150,0.08);
  border: 1px solid #e2e8f0;
  overflow: hidden;
}
.topic-content {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.topic-body {
  display: flex !important;
  flex-direction: column;
  gap: 16px;
  max-height: none !important;
  overflow: visible !important;
}
.topic-image {
  background: transparent;
  padding: 0 32px 32px 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.topic-image img {
  width: 100%;
  max-width: 400px;
  height: auto;
  object-fit: cover;
  display: block;
  border-radius: 12px;
}
.topic-image-inline {
  padding: 16px 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.topic-image-inline img {
  width: 100%;
  max-width: 500px;
  height: auto;
  object-fit: cover;
  display: block;
  border-radius: 12px;
  border: 2px dashed #e2e8f0;
}
.topic-card-inner {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 0;
  align-items: stretch;
}
.topic-card-content {
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.topic-section {
  background: var(--color-bg-light);
  border-radius: 12px;
  padding: 20px 24px;
  display: block !important;
  max-height: none !important;
  overflow: visible !important;
  opacity: 1 !important;
  visibility: visible !important;
  border-left: none !important;
}
.topic-section::before {
  display: none !important;
}
.topic-section h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 12px 0;
  display: block !important;
}
.topic-section p,
.topic-section ul {
  margin: 0;
  display: block !important;
}
.topic-section li {
  display: list-item !important;
}
.topic-card-image {
  position: relative;
  overflow: hidden;
  background: transparent;
  padding: 32px 32px 32px 16px;
  display: flex;
  align-items: stretch;
  justify-content: center;
}
.topic-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 12px;
}
.topic-level-badge {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}
.level-kepu {
  background: linear-gradient(135deg, #FF7A00, #FFF500);
  color: #fff;
}
.level-kechuang {
  background: linear-gradient(135deg, #00A3FF, #00D166);
  color: #fff;
}
.level-kekao {
  background: linear-gradient(135deg, #001021, #D4AF37);
  color: #D4AF37;
}
.topic-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: #1a202c;
  margin-bottom: 20px;
  line-height: 1.4;
}
.topic-section p {
  font-size: 15px;
  line-height: 1.8;
  color: #4a5568;
}
.topic-section ul {
  padding-left: 0;
}
.topic-section li {
  font-size: 14px;
  line-height: 1.7;
  color: #4a5568;
  padding: 6px 0 6px 20px;
  position: relative;
}
.topic-content li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

/* Topics page specific styles */
.topic-lab-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-bg-light);
  margin-bottom: 12px;
}
.topic-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}
.topic-num {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
}
.topic-tags {
  display: flex;
  gap: 8px;
}
.topic-tag {
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}
.tag-earth {
  background: #E8F5E9;
  color: #2E7D32;
}
.tag-eco {
  background: #E3F2FD;
  color: #1565C0;
}
.tag-bio {
  background: #FFF3E0;
  color: #E65100;
}
.tag-tech {
  background: #F3E5F5;
  color: #6A1B9A;
}
.topic-title {
  font-size: 20px;
  font-weight: 700;
  color: #1a202c;
  margin: 0 0 16px 0;
  line-height: 1.4;
}
.topic-value {
  padding: 16px 20px;
  background: #FFF9E6;
  border-radius: 10px;
  border-left: 4px solid #FFD700;
  font-size: 14px;
  color: #4a5568;
}
.topic-value span {
  font-weight: 700;
  color: #1a202c;
}
.topic-action {
  display: flex;
  justify-content: flex-end;
}

/* Camp CTA */
.camp-cta-content {
  text-align: center;
  color: #fff;
}
.camp-cta-title {
  font-size: 36px;
  font-weight: 900;
  margin-bottom: 16px;
}
.camp-cta-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
}
.camp-cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 24px;
}
.camp-cta-links {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
}
.camp-cta-links a {
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s;
}
.camp-cta-links a:hover {
  color: #fff;
}

/* Responsive */
@media (max-width: 1024px) {
  .overview-timeline {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .camp-hero {
    height: 500px;
  }
  .camp-title {
    font-size: 28px;
  }
  .camp-theme {
    font-size: 16px;
  }
  .camp-intro-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .overview-timeline {
    grid-template-columns: repeat(2, 1fr);
  }
  .schedule-day-content {
    grid-template-columns: 1fr;
  }
  .schedule-day-period {
    border-right: none;
    border-bottom: 1px solid #e2e8f0;
  }
  .schedule-day-period:last-child {
    border-bottom: none;
  }
  .topic-card {
    padding: 0;
  }
  .topic-card-inner {
    grid-template-columns: 1fr;
  }
  .topic-card-image {
    height: 200px;
    order: -1;
  }
  .topic-card-content {
    padding: 24px 20px;
  }
  .topic-card h3 {
    font-size: 18px;
  }
  .camp-cta-title {
    font-size: 24px;
  }
  .camp-cta-actions {
    flex-direction: column;
  }
  .camp-cta-actions .btn {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .camp-hero {
    height: 450px;
  }
  .camp-title {
    font-size: 24px;
  }
  .overview-timeline {
    grid-template-columns: 1fr;
  }
}
/* ========================================
   Contact QR Section
   ======================================== */
.contact-qr-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}
.contact-qr-title {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.contact-qr-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 40px;
}
.contact-qr-grid {
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}
.contact-qr-item {
  text-align: center;
  background: #ffffff;
  padding: 24px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(0,50,150,0.08);
}
.contact-qr-item img {
  width: 200px;
  height: 200px;
  object-fit: contain;
  display: block;
  margin: 0 auto 16px auto;
  transition: transform 0.3s ease;
}
.contact-qr-item:hover img {
  transform: scale(1.05);
}
.contact-qr-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin: 0;
}

@media (max-width: 768px) {
  .contact-qr-grid {
    gap: 40px;
  }
  .contact-qr-item {
    padding: 20px;
  }
  .contact-qr-item img {
    width: 180px;
    height: 180px;
  }
  .contact-qr-title {
    font-size: 26px;
  }
}

@media (max-width: 480px) {
  .contact-qr-grid {
    gap: 30px;
    flex-direction: column;
    align-items: center;
  }
  .contact-qr-item {
    padding: 16px;
    width: 100%;
    max-width: 240px;
  }
  .contact-qr-item img {
    width: 180px;
    height: 180px;
  }
}