/* ===== 午夜国产理论 品牌官网 完整样式表 ===== */
/* 深蓝夜空 × 理论鎏金 主题 | 响应式 + 暗色模式 + 动效 */

:root {
  --bg-primary: #F8FAFC;
  --bg-secondary: #FFFFFF;
  --bg-elevated: #F1F5F9;
  --bg-header: #0B2239;
  --text-strong: #1E293B;
  --text-title: #0F172A;
  --text-body: #243447;
  --text-muted: #334155;
  --text-link: #0B4F6C;
  --text-on-dark: #E2E8F0;
  --text-on-dark-strong: #F8FAFC;
  --border-light: #CBD5E1;
  --card-bg: #FFFFFF;
  --nav-bg: #0B2239;
  --btn-bg: #0B4F6C;
  --btn-text: #FFFFFF;
  --footer-bg: #0B2239;
  --footer-text: #C7D2DC;
  --accent-gold: #D4A853;
  --accent-blue: #3B82B6;
  --gradient-hero: linear-gradient(135deg, #0B2239 0%, #1E3A5F 50%, #2B4C7E 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.7), rgba(255,255,255,0.3));
  --glass-bg: rgba(255,255,255,0.65);
  --glass-border: rgba(255,255,255,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 30px rgba(212,168,83,0.15);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --transition-fast: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
  --font-primary: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --font-display: 'Georgia', 'Times New Roman', serif;
}

[data-theme="dark"] {
  --bg-primary: #0F172A;
  --bg-secondary: #1E293B;
  --bg-elevated: #243447;
  --bg-header: #0A0F1E;
  --text-strong: #F1F5F9;
  --text-title: #FFFFFF;
  --text-body: #E2E8F0;
  --text-muted: #94A3B8;
  --text-link: #7AB8D4;
  --text-on-dark: #E2E8F0;
  --text-on-dark-strong: #FFFFFF;
  --border-light: #334155;
  --card-bg: #1E293B;
  --nav-bg: #0A0F1E;
  --btn-bg: #3B82B6;
  --btn-text: #0B0F19;
  --footer-bg: #0A0F1E;
  --footer-text: #C7D2DC;
  --accent-gold: #E8C97A;
  --accent-blue: #60A5FA;
  --gradient-hero: linear-gradient(135deg, #0A0F1E 0%, #1A2D4C 50%, #2B4C7E 100%);
  --gradient-card: linear-gradient(145deg, rgba(30,41,59,0.8), rgba(30,41,59,0.4));
  --glass-bg: rgba(30,41,59,0.75);
  --glass-border: rgba(148,163,184,0.2);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(232,201,122,0.1);
}

/* ===== 基础重置与排版 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-body);
  font-family: var(--font-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  color: var(--text-title);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  font-family: var(--font-display);
  background: linear-gradient(135deg, var(--accent-gold), #FFF 50%, var(--accent-gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 30px rgba(212,168,83,0.2);
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.1rem);
  margin-top: 2.5rem;
  margin-bottom: 1.5rem;
  padding-left: 1.25rem;
  border-left: 4px solid var(--accent-gold);
  position: relative;
}

h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-gold), transparent);
}

h3 {
  font-size: 1.35rem;
  margin-top: 1.75rem;
  margin-bottom: 0.75rem;
}

h4 {
  font-size: 1.15rem;
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

p {
  color: var(--text-body);
  margin: 1rem 0;
  line-height: 1.8;
}

a {
  color: var(--text-link);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--accent-gold);
  text-decoration: none;
}

strong { font-weight: 700; color: var(--text-strong); }

img, svg { max-width: 100%; display: inline-block; vertical-align: middle; }

button {
  cursor: pointer;
  font-family: inherit;
}

::selection {
  background: rgba(212,168,83,0.3);
  color: var(--text-title);
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-elevated); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--accent-gold), var(--accent-blue));
  border-radius: 5px;
}

/* ===== 容器与布局 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.5rem;
  position: relative;
}

section { position: relative; }

main { overflow: hidden; }

/* ===== 动画关键帧 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(212,168,83,0.1); }
  50% { box-shadow: 0 0 40px rgba(212,168,83,0.3); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ===== 滚动进入动画 ===== */
.fade-in-up { animation: fadeInUp 0.8s ease both; }
.fade-in { animation: fadeIn 1s ease both; }
.scale-in { animation: scaleIn 0.6s ease both; }
.slide-left { animation: slideInLeft 0.8s ease both; }
.slide-right { animation: slideInRight 0.8s ease both; }

/* ===== Header 导航 ===== */
.site-header {
  background: var(--nav-bg);
  padding: 0.75rem 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(11, 34, 57, 0.9);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  transition: all var(--transition-fast);
  box-shadow: 0 4px 30px rgba(0,0,0,0.2);
}

[data-theme="dark"] .site-header {
  background: rgba(10, 15, 30, 0.95);
}

.nav-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 0.5rem 1.5rem;
}

.logo a {
  color: var(--text-on-dark-strong);
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(135deg, #fff, var(--accent-gold));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  text-decoration: none;
}

.logo a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-gold), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-fast);
}

.logo a:hover::after { transform: scaleX(1); }

.menu {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  align-items: center;
}

.menu a {
  color: var(--text-on-dark);
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
  font-size: 0.95rem;
}

.menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--accent-gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.menu a:hover {
  color: #fff;
  text-decoration: none;
}

.menu a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.search-box {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  background: rgba(255,255,255,0.08);
  border-radius: 40px;
  padding: 0.3rem 0.8rem;
  border: 1px solid rgba(255,255,255,0.1);
  transition: all var(--transition-fast);
}

.search-box:focus-within {
  background: rgba(255,255,255,0.15);
  border-color: var(--accent-gold);
  box-shadow: 0 0 20px rgba(212,168,83,0.2);
}

.search-box input {
  background: transparent;
  border: none;
  color: var(--text-on-dark-strong);
  padding: 0.4rem;
  width: 160px;
  outline: none;
  font-size: 0.9rem;
}

.search-box input::placeholder { color: #A0B3C9; }

.search-box button {
  background: none;
  border: none;
  color: var(--accent-gold);
  cursor: pointer;
  font-size: 1.1rem;
  transition: transform var(--transition-fast);
}

.search-box button:hover { transform: scale(1.2); }

.theme-toggle {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--text-on-dark);
  border-radius: 30px;
  padding: 0.35rem 1.2rem;
  cursor: pointer;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
  backdrop-filter: blur(10px);
}

.theme-toggle:hover {
  background: rgba(212,168,83,0.2);
  border-color: var(--accent-gold);
  transform: scale(1.05);
}

.mobile-menu-btn {
  display: none;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  color: white;
  padding: 0.3rem 1rem;
  border-radius: 20px;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
  background: rgba(212,168,83,0.2);
  border-color: var(--accent-gold);
}

/* ===== Hero 区域 ===== */
.hero {
  background: var(--gradient-hero);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  padding: 5rem 0;
  color: white;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 200%;
  background: radial-gradient(circle, rgba(212,168,83,0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(212,168,83,0.5), transparent);
}

.hero h1 {
  color: #FFFFFF;
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 30px rgba(0,0,0,0.3);
  animation: fadeInUp 1s ease both;
}

.hero p {
  color: #DCE6F0;
  max-width: 800px;
  font-size: 1.1rem;
  line-height: 1.8;
  animation: fadeInUp 1.2s ease both;
}

.hero .lead {
  font-size: 1.3rem;
  color: var(--accent-gold);
  font-weight: 500;
  margin-bottom: 1rem;
  animation: fadeInUp 1.1s ease both;
}

.hero .btn {
  background: linear-gradient(135deg, var(--accent-gold), #B8944E);
  border: none;
  padding: 0.9rem 2.5rem;
  border-radius: 50px;
  color: #0B2239;
  font-weight: 700;
  display: inline-block;
  margin-top: 2rem;
  font-size: 1rem;
  letter-spacing: 0.5px;
  box-shadow: 0 8px 30px rgba(212,168,83,0.3);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  animation: fadeInUp 1.4s ease both;
}

.hero .btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.6s;
}

.hero .btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(212,168,83,0.4);
}

.hero .btn:hover::before { left: 100%; }

/* ===== 面包屑 ===== */
.breadcrumb {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 1rem 0;
  background: var(--bg-elevated);
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.breadcrumb a {
  color: var(--text-link);
  transition: color var(--transition-fast);
}

.breadcrumb a:hover { color: var(--accent-gold); }

/* ===== 品牌介绍 ===== */
#brand {
  padding: 3rem 0;
}

#brand .brand-wrapper {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  align-items: flex-start;
}

#brand .brand-main {
  flex: 2;
  min-width: 280px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

#brand .brand-main::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-blue), var(--accent-gold));
  background-size: 200% 100%;
  animation: shimmer 3s linear infinite;
}

#brand .brand-main:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

#brand .brand-side {
  flex: 1;
  background: linear-gradient(145deg, var(--bg-elevated), var(--bg-secondary));
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-slow);
}

#brand .brand-side:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

.brand-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.brand-stat {
  text-align: center;
  padding: 1rem;
  background: var(--bg-secondary);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
}

.brand-stat:hover {
  transform: translateY(-3px);
  border-color: var(--accent-gold);
  box-shadow: var(--shadow-sm);
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent-gold);
  display: block;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin: 2.5rem 0;
}

.card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--glass-border);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
  animation: fadeInUp 0.8s ease both;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-gold), transparent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-slow);
}

.card:hover::before {
  transform: scaleX(1);
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(212,168,83,0.3);
}

.card h3 {
  margin-top: 0;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.card h3::before {
  content: '◆';
  color: var(--accent-gold);
  font-size: 0.8em;
  animation: glowPulse 2s ease infinite;
}

.card p {
  color: var(--text-body);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ===== Banner 区域 ===== */
.banner {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  margin: 3rem 0;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
}

.banner:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(212,168,83,0.3);
}

.banner-slide {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  padding: 1.5rem;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  transition: all var(--transition-slow);
  animation: fadeIn 1s ease both;
}

.banner-slide:hover {
  transform: translateX(10px);
  border-color: var(--accent-gold);
  box-shadow: var(--shadow-sm);
}

.banner-slide svg {
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-slow);
  flex-shrink: 0;
}

.banner-slide:hover svg {
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.banner-slide h3 {
  margin-top: 0;
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.banner-slide p {
  margin: 0.5rem 0;
  font-size: 0.95rem;
}

/* ===== 案例区域 ===== */
.case-grid {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.case-card {
  flex: 1;
  min-width: 280px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.case-card::after {
  content: '';
  position: absolute;
  bottom: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(212,168,83,0.1), transparent);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.case-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.case-card:hover::after { opacity: 1; }

.case-card h4 {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.case-card h4::before {
  content: '✦';
  color: var(--accent-gold);
  font-size: 1.2em;
}

/* ===== 新闻区域 ===== */
.news-layout {
  display: flex;
  gap: 2.5%;
  flex-wrap: wrap;
}

.news-main {
  flex: 3;
  min-width: 260px;
}

.news-sidebar {
  flex: 1;
  min-width: 200px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  height: fit-content;
  position: sticky;
  top: 100px;
  box-shadow: var(--shadow-sm);
}

.article-item {
  border-bottom: 1px solid var(--border-light);
  padding: 1.5rem 0;
  transition: all var(--transition-fast);
  position: relative;
  padding-left: 1rem;
}

.article-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--accent-gold);
  border-radius: 3px;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.article-item:hover {
  padding-left: 1.5rem;
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
}

.article-item:hover::before { opacity: 1; }

.article-item h4 {
  margin-bottom: 0.3rem;
  font-size: 1.1rem;
  transition: color var(--transition-fast);
}

.article-item:hover h4 {
  color: var(--accent-gold);
}

.meta {
  color: var(--text-muted);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.meta::before {
  content: '📅';
  font-size: 0.9em;
}

.article-item p {
  font-size: 0.9rem;
  margin: 0.5rem 0;
  line-height: 1.6;
}

.article-item a {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent-gold);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  transition: gap var(--transition-fast);
}

.article-item a::after {
  content: '→';
  font-size: 1.2em;
}

.article-item a:hover {
  gap: 0.6rem;
  color: var(--text-link);
}

/* ===== FAQ 区域 ===== */
#faq {
  padding: 3rem 0;
}

details {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1.2rem 1.8rem;
  margin-bottom: 1rem;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  animation: fadeInUp 0.6s ease both;
}

details:nth-child(2) { animation-delay: 0.1s; }
details:nth-child(3) { animation-delay: 0.2s; }
details:nth-child(4) { animation-delay: 0.3s; }
details:nth-child(5) { animation-delay: 0.4s; }
details:nth-child(6) { animation-delay: 0.5s; }
details:nth-child(7) { animation-delay: 0.6s; }
details:nth-child(8) { animation-delay: 0.7s; }
details:nth-child(9) { animation-delay: 0.8s; }
details:nth-child(10) { animation-delay: 0.9s; }
details:nth-child(11) { animation-delay: 1s; }
details:nth-child(12) { animation-delay: 1.1s; }
details:nth-child(13) { animation-delay: 1.2s; }
details:nth-child(14) { animation-delay: 1.3s; }
details:nth-child(15) { animation-delay: 1.4s; }
details:nth-child(16) { animation-delay: 1.5s; }

details:hover {
  border-color: rgba(212,168,83,0.3);
  box-shadow: var(--shadow-md);
  transform: translateX(5px);
}

details[open] {
  border-color: var(--accent-gold);
  box-shadow: 0 8px 30px rgba(212,168,83,0.15);
}

summary {
  font-weight: 600;
  cursor: pointer;
  color: var(--text-title);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color var(--transition-fast);
  position: relative;
  padding-right: 2rem;
}

summary::-webkit-details-marker { display: none; }

summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--accent-gold);
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  transition: transform var(--transition-fast);
}

details[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

summary:hover { color: var(--accent-gold); }

details p {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.95rem;
  color: var(--text-body);
}

/* ===== HowTo 区域 ===== */
#howto {
  background: var(--bg-elevated);
  padding: 3rem 1.5rem;
  border-radius: var(--radius-lg);
  margin: 3rem 0;
  position: relative;
  overflow: hidden;
}

#howto::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(212,168,83,0.05) 0%, transparent 50%);
  animation: gradientShift 15s ease infinite;
}

#howto p {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  padding: 1rem 1.5rem;
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent-gold);
  margin: 1rem 0;
  transition: all var(--transition-fast);
}

#howto p:hover {
  transform: translateX(5px);
  box-shadow: var(--shadow-sm);
}

#howto strong {
  color: var(--accent-gold);
  margin-right: 0.5rem;
}

/* ===== 联系区域 ===== */
#contact {
  padding: 3rem 0;
}

.contact-grid {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.contact-info {
  flex: 1;
  min-width: 280px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.contact-info p {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin: 0.8rem 0;
  font-size: 0.95rem;
}

.contact-info p::before {
  content: '📍';
  font-size: 1.2em;
  margin-top: 0.2rem;
}

.contact-info p:nth-child(2)::before { content: '📞'; }
.contact-info p:nth-child(3)::before { content: '✉️'; }
.contact-info p:nth-child(4)::before { content: '🕐'; }

.friendly-links {
  flex: 1;
  min-width: 200px;
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 2rem;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.friendly-links a {
  display: block;
  padding: 0.5rem 0;
  border-bottom: 1px dashed var(--border-light);
  transition: all var(--transition-fast);
  font-size: 0.95rem;
}

.friendly-links a:hover {
  color: var(--accent-gold);
  padding-left: 0.5rem;
}

.sitemap-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
  padding: 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  border-radius: var(--radius-md);
  border: 1px solid var(--glass-border);
}

.sitemap-links a {
  padding: 0.5rem 1.5rem;
  background: var(--bg-secondary);
  border-radius: 30px;
  border: 1px solid var(--border-light);
  transition: all var(--transition-fast);
  font-size: 0.9rem;
}

.sitemap-links a:hover {
  background: var(--accent-gold);
  color: var(--bg-header);
  border-color: var(--accent-gold);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
}

/* ===== 表格样式 ===== */
table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  margin: 2rem 0;
}

th, td {
  padding: 1rem 1.5rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-body);
  font-size: 0.95rem;
}

th {
  background: var(--bg-elevated);
  color: var(--text-title);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

tr:last-child td { border-bottom: none; }

tr {
  transition: all var(--transition-fast);
}

tr:hover td {
  background: var(--bg-elevated);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 3.5rem 0 0;
  margin-top: 4rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-gold), var(--accent-blue), var(--accent-gold));
  background-size: 200% 100%;
  animation: shimmer 3s linear infinite;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}

.footer-grid h4 {
  color: #FFFFFF;
  font-size: 1.1rem;
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-grid h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 2px;
  background: var(--accent-gold);
}

.footer-grid p {
  color: var(--footer-text);
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-grid a {
  color: var(--footer-text);
  font-size: 0.9rem;
  display: inline-block;
  padding: 0.25rem 0;
  transition: all var(--transition-fast);
  position: relative;
}

.footer-grid a:hover {
  color: var(--accent-gold);
  text-decoration: none;
  padding-left: 5px;
}

.copyright {
  text-align: center;
  padding: 1.5rem 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-size: 0.85rem;
  color: var(--footer-text);
  background: rgba(0,0,0,0.2);
}

/* ===== 返回顶部按钮 ===== */
#backToTop {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-blue));
  color: white;
  border-radius: 50%;
  width: 52px;
  height: 52px;
  font-size: 1.5rem;
  border: none;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: all var(--transition-fast);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  display: flex;
  align-items: center;
  justify-content: center;
}

#backToTop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

#backToTop:hover {
  transform: translateY(-5px) scale(1.1);
  box-shadow: 0 12px 40px rgba(212,168,83,0.4);
}

/* ===== 工具类 ===== */
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.p-2 { padding: 2rem; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .container { padding: 0 1.25rem; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 2rem; }
  .brand-stats { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 800px) {
  .nav-wrap { gap: 0.5rem; }
  
  .menu {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem 0;
    background: var(--nav-bg);
    border-radius: var(--radius-md);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }

  .menu.open {
    display: flex;
    animation: fadeIn 0.3s ease;
  }

  .menu a {
    padding: 0.8rem 1.5rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }

  .menu a:last-child { border-bottom: none; }

  .mobile-menu-btn { display: block; }

  .search-box input { width: 100px; }

  .hero { padding: 3.5rem 0; }
  .hero h1 { font-size: 2rem; }
  
  .card-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  
  .banner-slide { flex-direction: column; text-align: center; gap: 1.5rem; }
  
  .news-layout { flex-direction: column; }
  
  .news-sidebar { position: static; margin-top: 2rem; }
  
  #brand .brand-wrapper { flex-direction: column; }
  
  .case-grid { flex-direction: column; }
  
  .contact-grid { flex-direction: column; }
  
  .footer-grid { grid-template-columns: 1fr; text-align: center; }
  
  .footer-grid h4::after { left: 50%; transform: translateX(-50%); }
  
  .footer-grid a:hover { padding-left: 0; }
  
  #backToTop {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
    font-size: 1.2rem;
  }
  
  .sitemap-links { justify-content: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }
  
  .nav-wrap { padding: 0.5rem 1rem; }
  
  .logo a { font-size: 1.3rem; }
  
  .search-box { display: none; }
  
  .theme-toggle { padding: 0.3rem 0.8rem; font-size: 0.8rem; }
  
  .hero { padding: 2.5rem 0; }
  .hero h1 { font-size: 1.8rem; }
  
  h2 { font-size: 1.4rem; }
  
  .card { padding: 1.5rem; }
  
  .brand-stats { grid-template-columns: 1fr; }
  
  #howto { padding: 2rem 1rem; }
  
  .sitemap-links a { width: 100%; text-align: center; }
}

/* ===== 无障碍与可读性 ===== */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===== 滚动进入动画 ===== */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 玻璃拟态增强 ===== */
.glass-effect {
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
}

/* ===== 渐变文字 ===== */
.gradient-text {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-blue));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* ===== 按钮通用 ===== */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-gold), var(--accent-blue));
  color: white;
  border: none;
  padding: 0.8rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
  display: inline-block;
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  text-decoration: none;
  color: white;
}

/* ===== 高亮 ===== */
mark {
  background: linear-gradient(135deg, rgba(212,168,83,0.3), rgba(59,130,182,0.3));
  color: var(--text-strong);
  padding: 0.1rem 0.3rem;
  border-radius: 4px;
}

/* ===== 代码块 ===== */
code {
  background: var(--bg-elevated);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-size: 0.9em;
  color: var(--accent-gold);
}

/* ===== 列表样式 ===== */
ul, ol {
  padding-left: 1.5rem;
  margin: 1rem 0;
}

li {
  margin: 0.5rem 0;
  line-height: 1.7;
}

ul li::marker { color: var(--accent-gold); }

/* ===== 引用 ===== */
blockquote {
  border-left: 4px solid var(--accent-gold);
  padding: 1rem 1.5rem;
  margin: 1.5rem 0;
  background: var(--glass-bg);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
}

blockquote p { margin: 0; }

/* ===== 横向滚动卡片 ===== */
.horizontal-scroll {
  display: flex;
  overflow-x: auto;
  gap: 1.5rem;
  padding: 1rem 0;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.horizontal-scroll::-webkit-scrollbar { height: 6px; }
.horizontal-scroll::-webkit-scrollbar-thumb { background: var(--accent-gold); border-radius: 3px; }

.horizontal-scroll .card {
  min-width: 280px;
  scroll-snap-align: start;
  flex-shrink: 0;
}

/* ===== 加载动画 ===== */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-light);
  border-top-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== 焦点可见性 ===== */
:focus-visible {
  outline: 3px solid var(--accent-gold);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== 打印样式 ===== */
@media print {
  .site-header,
  .site-footer,
  #backToTop,
  .theme-toggle,
  .mobile-menu-btn,
  .search-box {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .container {
    max-width: 100%;
    padding: 0;
  }
}