/*
  海角视频 - 海量动漫影视资源在线观看平台
  原创样式表 - 赛博紫+荧光青配色方案
  域名：zz672207.cn
*/

/* ===== CSS变量 ===== */
:root {
  --primary: #7C3AED;
  --primary-dark: #6D28D9;
  --primary-light: #A78BFA;
  --secondary: #06B6D4;
  --secondary-dark: #0891B2;
  --accent: #F59E0B;
  --accent-light: #FCD34D;
  --bg-light: #F5F3FF;
  --bg-dark: #0F0A1E;
  --bg-card: #FFFFFF;
  --bg-section: #EDE9FE;
  --text-dark: #1E1B4B;
  --text-body: #4B5563;
  --text-light: #6B7280;
  --text-white: #F8FAFC;
  --border: #DDD6FE;
  --shadow: rgba(124, 58, 237, 0.12);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
}

/* ===== 全局重置 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--text-body);
  background: var(--bg-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--secondary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 {
  color: var(--text-dark);
  font-weight: 700;
  line-height: 1.3;
}

/* ===== 容器 ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 头部导航 ===== */
.site-header {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1a0f3a 100%);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  max-width: 1200px;
  margin: 0 auto;
  height: 68px;
}
.logo-area {
  display: flex;
  align-items: center;
  gap: 10px;
}
.logo-area img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  border: 2px solid var(--primary-light);
}
.logo-area .brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a {
  color: var(--text-white);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  opacity: 0.85;
}
.main-nav a:hover, .main-nav a.active {
  background: rgba(124, 58, 237, 0.3);
  color: var(--accent-light);
  opacity: 1;
}
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-white);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ===== 搜索框 ===== */
.search-bar {
  background: linear-gradient(135deg, #1a0f3a 0%, var(--bg-dark) 100%);
  padding: 14px 0;
  border-bottom: 1px solid rgba(124, 58, 237, 0.2);
}
.search-wrapper {
  max-width: 640px;
  margin: 0 auto;
  display: flex;
  gap: 0;
}
.search-wrapper input {
  flex: 1;
  padding: 10px 18px;
  border: 2px solid var(--primary);
  border-right: none;
  border-radius: var(--radius) 0 0 var(--radius);
  background: rgba(255,255,255,0.08);
  color: var(--text-white);
  font-size: 0.95rem;
  outline: none;
  transition: var(--transition);
}
.search-wrapper input::placeholder { color: rgba(255,255,255,0.4); }
.search-wrapper input:focus { border-color: var(--secondary); background: rgba(255,255,255,0.12); }
.search-wrapper button {
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.search-wrapper button:hover { opacity: 0.9; transform: scale(1.02); }

/* ===== Hero轮播 ===== */
.hero-section { position: relative; overflow: hidden; background: var(--bg-dark); }
.hero-slider { position: relative; height: 480px; }
.hero-slide {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
}
.hero-slide.active { opacity: 1; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(15,10,30,0.75) 0%, rgba(124,58,237,0.35) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-content {
  text-align: center;
  color: white;
  padding: 0 20px;
  max-width: 700px;
}
.hero-content h1 {
  font-size: 2.6rem;
  font-weight: 900;
  color: white;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(124,58,237,0.5);
}
.hero-content h1 span {
  background: linear-gradient(135deg, var(--accent-light), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content p {
  font-size: 1.15rem;
  opacity: 0.9;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
}
.hero-dots span {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: var(--transition);
}
.hero-dots span.active { background: var(--accent); transform: scale(1.3); }
.hero-btn {
  display: inline-block;
  padding: 14px 36px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: 50px;
  font-size: 1.05rem;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
  transition: var(--transition);
}
.hero-btn:hover { transform: translateY(-2px); box-shadow: 0 6px 30px rgba(124,58,237,0.5); color: white; }

/* ===== 通用区块 ===== */
.section { padding: 70px 0; }
.section-alt { background: var(--bg-section); }
.section-dark { background: linear-gradient(135deg, var(--bg-dark) 0%, #1a0f3a 100%); color: var(--text-white); }
.section-dark h2, .section-dark h3, .section-dark h4 { color: var(--text-white); }
.section-header { text-align: center; margin-bottom: 48px; }
.section-header h2 { font-size: 2rem; margin-bottom: 12px; }
.section-header h2 span { color: var(--primary); }
.section-header p { color: var(--text-light); font-size: 1.05rem; max-width: 600px; margin: 0 auto; }
.section-dark .section-header p { color: rgba(255,255,255,0.7); }

/* ===== 视频/动漫卡片网格 ===== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover { transform: translateY(-6px); box-shadow: 0 12px 32px var(--shadow); }
.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
}
.video-thumb img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 56px; height: 56px;
  background: rgba(124, 58, 237, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(124,58,237,0.5);
}
.play-btn::after {
  content: "";
  display: block;
  width: 0; height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent white;
  margin-left: 3px;
}
.video-card:hover .play-btn { transform: translate(-50%, -50%) scale(1); }
.video-duration {
  position: absolute;
  bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75);
  color: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
}
.video-info { padding: 14px 16px; }
.video-info h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.82rem;
  color: var(--text-light);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-tags { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.video-tags span {
  padding: 2px 10px;
  background: var(--bg-section);
  color: var(--primary);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* ===== 服务卡片网格 ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}
.service-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: 0 8px 28px var(--shadow);
}
.service-icon {
  width: 64px; height: 64px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: white;
}
.service-card h4 { font-size: 1.1rem; margin-bottom: 10px; }
.service-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }

/* ===== 社区功能 ===== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.community-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(124,58,237,0.25);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: var(--transition);
}
.community-card:hover {
  background: rgba(124,58,237,0.12);
  border-color: var(--primary-light);
  transform: translateY(-3px);
}
.community-card .card-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
  display: block;
}
.community-card h4 { font-size: 1.05rem; margin-bottom: 8px; }
.community-card p { font-size: 0.88rem; opacity: 0.75; line-height: 1.6; }

/* ===== AI赋能 ===== */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.ai-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  border-top: 3px solid var(--secondary);
}
.ai-card:hover { transform: translateY(-4px); }
.ai-card .ai-icon {
  font-size: 2.4rem;
  margin-bottom: 14px;
  display: block;
}
.ai-card h4 { font-size: 1rem; margin-bottom: 8px; }
.ai-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }

/* ===== 专家团队 ===== */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}
.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover { transform: translateY(-4px); }
.expert-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}
.expert-info { padding: 18px 16px; }
.expert-info h4 { font-size: 1.05rem; margin-bottom: 4px; }
.expert-info .role { color: var(--primary); font-size: 0.88rem; font-weight: 600; margin-bottom: 8px; }
.expert-info p { font-size: 0.85rem; color: var(--text-light); line-height: 1.5; }
.expert-btns { display: flex; gap: 8px; justify-content: center; margin-top: 12px; }
.expert-btns a {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: var(--transition);
}
.btn-contact {
  background: var(--primary);
  color: white;
}
.btn-contact:hover { background: var(--primary-dark); color: white; }
.btn-works {
  border: 1px solid var(--primary);
  color: var(--primary);
}
.btn-works:hover { background: var(--primary); color: white; }

/* ===== 合作品牌 ===== */
.brand-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px;
  align-items: center;
}
.brand-wall .brand-item {
  padding: 16px 28px;
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 8px var(--shadow);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-light);
  transition: var(--transition);
}
.brand-wall .brand-item:hover { color: var(--primary); transform: scale(1.05); }

/* ===== HowTo步骤 ===== */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.howto-step {
  text-align: center;
  padding: 28px 18px;
  position: relative;
}
.howto-step::before {
  counter-increment: step;
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px; height: 52px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border-radius: 50%;
  font-size: 1.4rem;
  font-weight: 800;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(124,58,237,0.3);
}
.howto-step h4 { font-size: 1.05rem; margin-bottom: 8px; }
.howto-step p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }

/* ===== 资讯列表 ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  display: flex;
  gap: 18px;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 4px 12px var(--shadow);
  transition: var(--transition);
}
.news-card:hover { transform: translateY(-3px); }
.news-card .news-date {
  min-width: 70px;
  text-align: center;
  padding: 10px 0;
}
.news-date .day { font-size: 2rem; font-weight: 800; color: var(--primary); display: block; line-height: 1; }
.news-date .month { font-size: 0.85rem; color: var(--text-light); }
.news-body h4 { font-size: 1rem; margin-bottom: 6px; }
.news-body p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }

/* ===== FAQ手风琴 ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: 0 2px 8px var(--shadow);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}
.faq-question:hover { color: var(--primary); }
.faq-question::after {
  content: "+";
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--primary);
  transition: var(--transition);
}
.faq-item.open .faq-question::after { content: "−"; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer p {
  padding: 0 24px 18px;
  font-size: 0.92rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 用户评价 ===== */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: 0 4px 12px var(--shadow);
  transition: var(--transition);
}
.review-card:hover { transform: translateY(-3px); }
.review-stars { color: var(--accent); font-size: 1rem; margin-bottom: 10px; }
.review-card p { font-size: 0.92rem; color: var(--text-body); line-height: 1.7; margin-bottom: 14px; font-style: italic; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 0.9rem;
}
.review-author .name { font-weight: 600; font-size: 0.9rem; color: var(--text-dark); }
.review-author .date { font-size: 0.8rem; color: var(--text-light); }

/* ===== 联系预览 ===== */
.contact-preview {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.contact-info-list { list-style: none; }
.contact-info-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
  font-size: 0.95rem;
}
.contact-info-list .icon {
  width: 40px; height: 40px;
  min-width: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.1rem;
}
.qrcode-area {
  display: flex;
  gap: 28px;
  justify-content: center;
}
.qrcode-item { text-align: center; }
.qrcode-item img {
  width: 150px; height: 150px;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  margin-bottom: 8px;
}
.qrcode-item p { font-size: 0.88rem; color: var(--text-light); font-weight: 600; }

/* ===== 页脚 ===== */
.site-footer {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #0d0820 100%);
  color: var(--text-white);
  padding: 50px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  display: inline-block;
}
.footer-brand p { font-size: 0.88rem; opacity: 0.7; line-height: 1.7; margin-bottom: 16px; }
.footer-brand img { width: 36px; height: 36px; border-radius: 8px; }
.footer-col h4 {
  color: var(--text-white);
  font-size: 1rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.65); font-size: 0.9rem; }
.footer-col ul li a:hover { color: var(--secondary); }
.footer-social { display: flex; gap: 12px; margin-top: 14px; }
.footer-social a {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.9rem;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); }
.footer-bottom {
  text-align: center;
  padding: 20px 0;
  font-size: 0.85rem;
  opacity: 0.6;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.88rem;
  color: var(--text-light);
}
.breadcrumb a { color: var(--primary); }
.breadcrumb span { margin: 0 8px; }

/* ===== 内页通用 ===== */
.page-hero {
  background: linear-gradient(135deg, var(--bg-dark) 0%, #1a0f3a 100%);
  padding: 60px 0;
  text-align: center;
  color: white;
}
.page-hero h1 { font-size: 2.2rem; color: white; margin-bottom: 12px; }
.page-hero p { font-size: 1.05rem; opacity: 0.8; max-width: 600px; margin: 0 auto; }
.page-content { padding: 50px 0; }
.page-content h2 { font-size: 1.6rem; margin-bottom: 18px; color: var(--text-dark); }
.page-content h3 { font-size: 1.3rem; margin-bottom: 14px; color: var(--text-dark); }
.page-content p { margin-bottom: 16px; line-height: 1.8; }

/* ===== 联系表单 ===== */
.contact-form { max-width: 600px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 6px;
  font-size: 0.95rem;
  color: var(--text-dark);
}
.form-group input, .form-group textarea, .form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-family: inherit;
  transition: var(--transition);
  outline: none;
}
.form-group input:focus, .form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.btn-submit {
  padding: 14px 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  border: none;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}
.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 4px 20px rgba(124,58,237,0.4); }

/* ===== 分类筛选 ===== */
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 36px;
}
.filter-bar button {
  padding: 8px 22px;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-body);
  cursor: pointer;
  transition: var(--transition);
}
.filter-bar button:hover, .filter-bar button.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* ===== 时间线 ===== */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 15px; top: 0; bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--primary), var(--secondary));
  border-radius: 2px;
}
.timeline-item { position: relative; margin-bottom: 32px; }
.timeline-item::before {
  content: "";
  position: absolute;
  left: -33px; top: 6px;
  width: 14px; height: 14px;
  background: var(--primary);
  border-radius: 50%;
  border: 3px solid var(--bg-light);
  box-shadow: 0 0 0 3px var(--primary);
}
.timeline-item h4 { font-size: 1.05rem; margin-bottom: 4px; }
.timeline-item .year { color: var(--primary); font-weight: 700; font-size: 0.9rem; }
.timeline-item p { font-size: 0.9rem; color: var(--text-light); margin-top: 6px; }

/* ===== 工具卡片 ===== */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.tool-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  border-left: 4px solid var(--primary);
}
.tool-card:hover { transform: translateY(-4px); }
.tool-card .tool-icon { font-size: 2.4rem; margin-bottom: 14px; display: block; }
.tool-card h4 { font-size: 1.1rem; margin-bottom: 10px; }
.tool-card p { font-size: 0.88rem; color: var(--text-light); line-height: 1.6; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .header-inner { height: 60px; }
  .main-nav {
    display: none;
    position: absolute;
    top: 60px; left: 0; right: 0;
    background: var(--bg-dark);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; width: 100%; }
  .mobile-toggle { display: block; }
  .hero-slider { height: 360px; }
  .hero-content h1 { font-size: 1.8rem; }
  .video-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .service-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .contact-preview { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .tool-grid { grid-template-columns: 1fr; }
  .section { padding: 45px 0; }
  .page-hero { padding: 40px 0; }
  .page-hero h1 { font-size: 1.6rem; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-slider { height: 280px; }
  .hero-content h1 { font-size: 1.5rem; }
  .qrcode-area { flex-direction: column; align-items: center; }
}