/* ===================================================
   开云体育官方网站 - 主样式文件
   official-login-kaiyungame.com
   =================================================== */

/* ---- 全局变量 ---- */
:root {
  --brand-blue: #1a6bff;
  --brand-dark: #0a0e1a;
  --brand-darker: #060810;
  --brand-accent: #ff3d3d;
  --brand-gold: #f5a623;
  --text-primary: #ffffff;
  --text-secondary: #b0bec5;
  --text-dark: #1a1a2e;
  --border-color: rgba(255,255,255,0.1);
  --card-bg: rgba(255,255,255,0.05);
  --section-bg: #0d1120;
  --section-alt: #111827;
  --transition: all 0.3s ease;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-blue: 0 4px 20px rgba(26,107,255,0.3);
}

/* ---- 重置与基础 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--brand-dark);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--brand-blue); text-decoration: none; transition: var(--transition); }
a:hover { color: #5a9bff; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; }
input, textarea { outline: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; }

/* ---- 通用容器 ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section { padding: 80px 0; }
.section-alt { background-color: var(--section-alt); }

/* ---- 通用标题 ---- */
.section-header { text-align: center; margin-bottom: 60px; }
.section-header .tag {
  display: inline-block;
  background: rgba(26,107,255,0.15);
  color: var(--brand-blue);
  border: 1px solid rgba(26,107,255,0.4);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(24px, 4vw, 42px);
  color: var(--text-primary);
  margin-bottom: 16px;
}
.section-header h2 span { color: var(--brand-blue); }
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ---- 按钮 ---- */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--brand-blue);
  color: #fff;
  box-shadow: var(--shadow-blue);
}
.btn-primary:hover {
  background: #2d7bff;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(26,107,255,0.5);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-outline:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
  transform: translateY(-2px);
}
.btn-accent {
  background: var(--brand-accent);
  color: #fff;
}
.btn-accent:hover {
  background: #ff5555;
  color: #fff;
  transform: translateY(-2px);
}

/* ============================================================
   顶部导航
   ============================================================ */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 9999;
  background: rgba(10,14,26,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}
#site-header.scrolled {
  background: rgba(10,14,26,0.98);
  box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}
.logo-wrap img {
  height: 44px;
  width: auto;
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
}
.logo-text span { color: var(--brand-blue); }

/* 主导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: #fff;
  background: rgba(26,107,255,0.15);
}
.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  width: 20px; height: 2px;
  background: var(--brand-blue);
  border-radius: 2px;
}

/* 搜索框 */
.header-search {
  display: flex;
  align-items: center;
  gap: 8px;
}
.search-form {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 24px;
  padding: 6px 16px;
  gap: 8px;
  transition: var(--transition);
}
.search-form:focus-within {
  border-color: var(--brand-blue);
  background: rgba(26,107,255,0.1);
}
.search-form input {
  background: transparent;
  border: none;
  color: #fff;
  font-size: 13px;
  width: 160px;
}
.search-form input::placeholder { color: rgba(255,255,255,0.4); }
.search-form button {
  background: none;
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  padding: 0;
  transition: var(--transition);
}
.search-form button:hover { color: var(--brand-blue); }

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 4px;
}
.menu-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}

/* 搜索栏（导航下方） */
.search-bar-wrap {
  background: rgba(10,14,26,0.98);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
}
.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-bar-inner .search-full {
  flex: 1;
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 6px;
  padding: 8px 16px;
  gap: 10px;
}
.search-bar-inner .search-full input {
  flex: 1;
  background: none;
  border: none;
  color: #fff;
  font-size: 14px;
}
.search-bar-inner .search-full input::placeholder { color: rgba(255,255,255,0.35); }
.search-bar-inner .search-full button {
  background: var(--brand-blue);
  color: #fff;
  border-radius: 4px;
  padding: 4px 14px;
  font-size: 13px;
  font-weight: 600;
}
.search-bar-inner .search-full button:hover { background: #2d7bff; }
.search-hot-tags { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.search-hot-tags span { color: var(--text-secondary); font-size: 12px; white-space: nowrap; }
.search-hot-tags a {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 2px 10px;
  border-radius: 12px;
  transition: var(--transition);
}
.search-hot-tags a:hover { color: var(--brand-blue); border-color: var(--brand-blue); }

/* ============================================================
   首屏 Banner 轮播
   ============================================================ */
#hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  margin-top: 0;
}
.hero-slides { position: relative; width: 100%; height: 100%; }
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,14,26,0.85) 0%, rgba(10,14,26,0.5) 60%, rgba(10,14,26,0.2) 100%);
}
.hero-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  width: 90%;
  max-width: 900px;
  z-index: 2;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(26,107,255,0.2);
  border: 1px solid rgba(26,107,255,0.5);
  color: #7ab4ff;
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero-tag .dot {
  width: 8px; height: 8px;
  background: var(--brand-accent);
  border-radius: 50%;
  animation: blink 1.5s infinite;
}
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }
.hero-content h1 {
  font-size: clamp(32px, 6vw, 72px);
  font-weight: 900;
  color: #fff;
  line-height: 1.15;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.hero-content h1 span { color: var(--brand-blue); }
.hero-content p {
  font-size: clamp(15px, 2vw, 20px);
  color: rgba(255,255,255,0.8);
  margin-bottom: 16px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.hero-advantages {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero-advantages span {
  display: flex;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,0.7);
  font-size: 14px;
}
.hero-advantages span::before {
  content: '✓';
  color: var(--brand-blue);
  font-weight: 700;
}
.hero-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.4);
  font-size: 12px;
}
.hero-scroll .arrow {
  width: 20px; height: 20px;
  border-right: 2px solid rgba(255,255,255,0.4);
  border-bottom: 2px solid rgba(255,255,255,0.4);
  transform: rotate(45deg);
  animation: scrollDown 1.5s infinite;
}
@keyframes scrollDown { 0%{transform:rotate(45deg) translateY(0);opacity:1} 100%{transform:rotate(45deg) translateY(8px);opacity:0} }

/* 轮播指示点 */
.hero-dots {
  position: absolute;
  bottom: 80px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}
.hero-dots .dot {
  width: 8px; height: 8px;
  background: rgba(255,255,255,0.3);
  border-radius: 50%;
  cursor: pointer;
  transition: var(--transition);
}
.hero-dots .dot.active {
  background: var(--brand-blue);
  width: 24px;
  border-radius: 4px;
}

/* ============================================================
   统计数字栏
   ============================================================ */
#stats {
  background: linear-gradient(90deg, #0d1120 0%, #111827 100%);
  padding: 40px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
}
.stat-item {
  text-align: center;
  padding: 20px;
  border-right: 1px solid var(--border-color);
}
.stat-item:last-child { border-right: none; }
.stat-num {
  font-size: clamp(28px, 4vw, 48px);
  font-weight: 900;
  color: var(--brand-blue);
  line-height: 1;
  margin-bottom: 8px;
}
.stat-num span { color: var(--brand-accent); }
.stat-label { font-size: 13px; color: var(--text-secondary); }

/* ============================================================
   视频网格（赛事视频核心模块）
   ============================================================ */
#video-grid { background: var(--brand-dark); }
.video-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.video-tab {
  padding: 8px 24px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  background: rgba(255,255,255,0.06);
  color: var(--text-secondary);
  border: 1px solid rgba(255,255,255,0.1);
  cursor: pointer;
  transition: var(--transition);
}
.video-tab.active, .video-tab:hover {
  background: var(--brand-blue);
  color: #fff;
  border-color: var(--brand-blue);
}
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.video-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(26,107,255,0.4);
}
.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}
.video-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.video-play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 60px; height: 60px;
  background: rgba(26,107,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  backdrop-filter: blur(4px);
}
.video-card:hover .video-play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.video-play-btn::after {
  content: '';
  width: 0; height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 18px solid #fff;
  margin-left: 4px;
}
.video-badge {
  position: absolute;
  top: 12px; left: 12px;
  background: var(--brand-accent);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 0.5px;
}
.video-badge.live { background: #ff3d3d; animation: blink 1.5s infinite; }
.video-badge.hot { background: var(--brand-gold); color: #000; }
.video-duration {
  position: absolute;
  bottom: 10px; right: 10px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-info { padding: 16px; }
.video-info h3 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-secondary);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* ============================================================
   品牌介绍
   ============================================================ */
#about { background: var(--section-alt); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.about-img { border-radius: var(--radius-lg); overflow: hidden; position: relative; }
.about-img img { width: 100%; height: 380px; object-fit: cover; }
.about-img::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid rgba(26,107,255,0.3);
  border-radius: var(--radius-lg);
  pointer-events: none;
}
.about-content h2 { font-size: clamp(24px, 3vw, 38px); margin-bottom: 20px; }
.about-content h2 span { color: var(--brand-blue); }
.about-content p { color: var(--text-secondary); margin-bottom: 20px; line-height: 1.8; }
.about-values {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 32px;
}
.value-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  transition: var(--transition);
}
.value-item:hover { border-color: var(--brand-blue); background: rgba(26,107,255,0.08); }
.value-icon { font-size: 24px; margin-bottom: 8px; }
.value-item h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.value-item p { font-size: 12px; color: var(--text-secondary); margin: 0; }

/* ============================================================
   服务模块
   ============================================================ */
#services { background: var(--brand-dark); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-blue), #5a9bff);
  transform: scaleX(0);
  transition: var(--transition);
}
.service-card:hover::before { transform: scaleX(1); }
.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(26,107,255,0.4);
  box-shadow: var(--shadow);
}
.service-icon {
  width: 60px; height: 60px;
  background: rgba(26,107,255,0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin-bottom: 20px;
  transition: var(--transition);
}
.service-card:hover .service-icon { background: var(--brand-blue); }
.service-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: #fff; }
.service-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; }
.service-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.service-tag {
  font-size: 11px;
  color: var(--brand-blue);
  background: rgba(26,107,255,0.1);
  border: 1px solid rgba(26,107,255,0.2);
  padding: 3px 10px;
  border-radius: 12px;
}

/* ============================================================
   案例模块
   ============================================================ */
#cases { background: var(--section-alt); }
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.case-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(26,107,255,0.4);
}
.case-thumb { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.case-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.case-card:hover .case-thumb img { transform: scale(1.06); }
.case-industry {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(26,107,255,0.85);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 12px;
}
.case-body { padding: 20px; }
.case-body h3 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 10px; line-height: 1.4; }
.case-body p { font-size: 13px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.case-result {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.case-metric { text-align: center; }
.case-metric .num { font-size: 20px; font-weight: 800; color: var(--brand-blue); }
.case-metric .label { font-size: 11px; color: var(--text-secondary); }

/* ============================================================
   资讯模块
   ============================================================ */
#news { background: var(--brand-dark); }
.news-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}
.news-featured {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.news-featured:hover {
  border-color: rgba(26,107,255,0.4);
  box-shadow: var(--shadow);
}
.news-featured img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}
.news-featured-body { padding: 24px; }
.news-cat {
  display: inline-block;
  background: rgba(26,107,255,0.15);
  color: var(--brand-blue);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 12px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.news-featured-body h3 { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 10px; line-height: 1.4; }
.news-featured-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; }
.news-date { font-size: 12px; color: rgba(255,255,255,0.35); }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px;
  transition: var(--transition);
}
.news-item:hover { border-color: rgba(26,107,255,0.4); background: rgba(26,107,255,0.05); }
.news-item .news-cat { margin-bottom: 8px; }
.news-item h4 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 6px; line-height: 1.4; }
.news-item .news-date { font-size: 11px; }

/* ============================================================
   口碑评价
   ============================================================ */
#reviews { background: var(--section-alt); }
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 16px; right: 24px;
  font-size: 80px;
  color: rgba(26,107,255,0.1);
  font-family: Georgia, serif;
  line-height: 1;
}
.review-card:hover {
  border-color: rgba(26,107,255,0.4);
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}
.review-stars { color: var(--brand-gold); font-size: 16px; margin-bottom: 14px; letter-spacing: 2px; }
.review-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 20px; font-style: italic; }
.reviewer { display: flex; align-items: center; gap: 12px; }
.reviewer-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--brand-blue), #5a9bff);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.reviewer-info h5 { font-size: 14px; font-weight: 700; color: #fff; }
.reviewer-info span { font-size: 12px; color: var(--text-secondary); }

/* ============================================================
   合作伙伴
   ============================================================ */
#partners { background: var(--brand-dark); padding: 60px 0; }
.partners-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}
.partner-logo {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 16px 28px;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: var(--transition);
  white-space: nowrap;
}
.partner-logo:hover { border-color: var(--brand-blue); color: var(--brand-blue); }

/* ============================================================
   FAQ
   ============================================================ */
#faq { background: var(--section-alt); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: rgba(26,107,255,0.5); }
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  background: var(--card-bg);
  transition: var(--transition);
}
.faq-question:hover { background: rgba(26,107,255,0.08); }
.faq-question h4 { font-size: 15px; font-weight: 600; color: #fff; flex: 1; padding-right: 16px; }
.faq-icon {
  width: 24px; height: 24px;
  border-radius: 50%;
  background: rgba(26,107,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-blue);
  font-size: 18px;
  font-weight: 300;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-icon { background: var(--brand-blue); color: #fff; transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ============================================================
   联系模块
   ============================================================ */
#contact { background: var(--brand-dark); }
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.contact-info h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
.contact-info h2 span { color: var(--brand-blue); }
.contact-info > p { color: var(--text-secondary); margin-bottom: 32px; line-height: 1.8; }
.contact-items { display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; align-items: flex-start; gap: 16px; }
.contact-icon {
  width: 44px; height: 44px;
  background: rgba(26,107,255,0.15);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}
.contact-item h5 { font-size: 13px; color: var(--text-secondary); margin-bottom: 4px; }
.contact-item p { font-size: 15px; color: #fff; font-weight: 500; }
.contact-map {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: var(--text-secondary);
  font-size: 14px;
}
.contact-map .map-icon { font-size: 48px; }

/* ============================================================
   页脚
   ============================================================ */
#site-footer {
  background: var(--brand-darker);
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}
.footer-brand .logo-wrap { margin-bottom: 16px; }
.footer-brand p { font-size: 13px; color: var(--text-secondary); line-height: 1.8; max-width: 280px; }
.footer-qr { display: flex; gap: 16px; margin-top: 20px; }
.qr-item { text-align: center; }
.qr-box {
  width: 80px; height: 80px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 6px;
}
.qr-item span { font-size: 11px; color: var(--text-secondary); }
.footer-col h4 { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { font-size: 13px; color: var(--text-secondary); transition: var(--transition); }
.footer-col ul li a:hover { color: var(--brand-blue); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p { font-size: 12px; color: rgba(255,255,255,0.3); }
.footer-bottom p a { color: rgba(255,255,255,0.4); }
.footer-bottom p a:hover { color: var(--brand-blue); }
.footer-social { display: flex; gap: 12px; }
.social-btn {
  width: 34px; height: 34px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}
.social-btn:hover { background: var(--brand-blue); border-color: var(--brand-blue); color: #fff; }

/* ============================================================
   面包屑
   ============================================================ */
.breadcrumb {
  background: var(--section-alt);
  padding: 16px 0;
  border-bottom: 1px solid var(--border-color);
  margin-top: 70px;
}
.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
}
.breadcrumb-inner a { color: var(--text-secondary); }
.breadcrumb-inner a:hover { color: var(--brand-blue); }
.breadcrumb-inner .sep { color: rgba(255,255,255,0.2); }
.breadcrumb-inner .current { color: var(--brand-blue); }

/* ============================================================
   内页 Hero
   ============================================================ */
.page-hero {
  background: linear-gradient(135deg, #0a0e1a 0%, #111827 100%);
  padding: 80px 0 60px;
  margin-top: 70px;
  text-align: center;
  border-bottom: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -50%; left: -20%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(26,107,255,0.1) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero h1 { font-size: clamp(28px, 4vw, 48px); color: #fff; margin-bottom: 16px; }
.page-hero h1 span { color: var(--brand-blue); }
.page-hero p { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

/* ============================================================
   CTA 横幅
   ============================================================ */
.cta-banner {
  background: linear-gradient(135deg, #1a3a8f 0%, #0a1a5c 100%);
  padding: 60px 0;
  text-align: center;
  border-top: 1px solid rgba(26,107,255,0.3);
  border-bottom: 1px solid rgba(26,107,255,0.3);
}
.cta-banner h2 { font-size: clamp(24px, 3vw, 36px); color: #fff; margin-bottom: 12px; }
.cta-banner p { color: rgba(255,255,255,0.7); margin-bottom: 28px; font-size: 15px; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-right: 1px solid var(--border-color); border-top: 1px solid var(--border-color); }
  .stat-item:nth-child(4) { border-top: 1px solid var(--border-color); }
}

@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: rgba(10,14,26,0.98); padding: 20px; border-bottom: 1px solid var(--border-color); gap: 4px; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; border-radius: var(--radius); }
  .menu-toggle { display: flex; }
  .header-search { display: none; }
  .hero-content h1 { font-size: 32px; }
  .about-grid { grid-template-columns: 1fr; }
  .about-img { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .about-values { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-advantages { gap: 12px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
}

/* ============================================================
   滚动动画
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   Loading 遮罩
   ============================================================ */
#page-loader {
  position: fixed;
  inset: 0;
  background: var(--brand-darker);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  transition: opacity 0.5s ease;
}
#page-loader.hidden { opacity: 0; pointer-events: none; }
.loader-logo { font-size: 28px; font-weight: 900; color: #fff; letter-spacing: 2px; }
.loader-logo span { color: var(--brand-blue); }
.loader-bar {
  width: 200px; height: 3px;
  background: rgba(255,255,255,0.1);
  border-radius: 3px;
  overflow: hidden;
}
.loader-bar::after {
  content: '';
  display: block;
  height: 100%;
  width: 40%;
  background: var(--brand-blue);
  border-radius: 3px;
  animation: loading 1s ease infinite;
}
@keyframes loading { 0%{transform:translateX(-100%)} 100%{transform:translateX(350%)} }

/* ============================================================
   视频模态框
   ============================================================ */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 99998;
  align-items: center;
  justify-content: center;
}
.video-modal.open { display: flex; }
.video-modal-inner {
  background: var(--brand-dark);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 800px;
  width: 90%;
  position: relative;
}
.video-modal-close {
  position: absolute;
  top: -16px; right: -16px;
  width: 36px; height: 36px;
  background: var(--brand-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  cursor: pointer;
  font-weight: 700;
}
.video-placeholder {
  aspect-ratio: 16/9;
  background: #000;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 12px;
  color: rgba(255,255,255,0.5);
  font-size: 14px;
}
.video-placeholder .play-icon { font-size: 48px; }