/* ============================================
   福利导航汽车改装社区 - 主样式表
   hndsdt.cn | 完全原创设计
   ============================================ */

/* === CSS变量 === */
:root {
  --primary: #FF6B35;
  --primary-dark: #E55A25;
  --primary-light: #FF8C5A;
  --blue: #004E89;
  --blue-light: #0066B3;
  --gold: #F7B801;
  --neon: #00D9FF;
  --bg-dark: #0F1419;
  --bg-card: #1A2030;
  --bg-card2: #1E2840;
  --border: rgba(255,107,53,0.2);
  --border-blue: rgba(0,78,137,0.4);
  --text: #E8E8E8;
  --text-muted: #8A9BB0;
  --text-bright: #FFFFFF;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 8px 32px rgba(0,0,0,0.4);
  --shadow-orange: 0 4px 20px rgba(255,107,53,0.3);
  --shadow-blue: 0 4px 20px rgba(0,78,137,0.4);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* === 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: 'Microsoft YaHei', 'PingFang SC', '微软雅黑', sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* === 干扰标签隐藏 === */
.kkt-noise-wrap { display: none !important; }

/* === 滚动条 === */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* === 顶部公告栏 === */
.top-bar {
  background: linear-gradient(90deg, var(--blue) 0%, var(--bg-dark) 50%, var(--primary) 100%);
  padding: 6px 0;
  font-size: 13px;
  text-align: center;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}
.top-bar a { color: var(--neon); margin: 0 8px; }
.top-bar a:hover { color: var(--primary); }

/* === 导航栏 === */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15, 20, 25, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 20px;
  height: 64px;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
}
.site-logo .brand-name {
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary) 0%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.site-nav a {
  color: var(--text);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  transition: var(--transition);
}
.site-nav a:hover, .site-nav a.active {
  color: var(--primary);
  background: rgba(255,107,53,0.1);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.btn-join {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff !important;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: var(--transition);
  box-shadow: var(--shadow-orange);
}
.btn-join:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(255,107,53,0.5);
}
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* === 搜索框 === */
.search-bar {
  background: rgba(26, 32, 48, 0.9);
  border-bottom: 1px solid var(--border);
  padding: 10px 20px;
}
.search-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}
.search-form {
  display: flex;
  align-items: center;
  background: var(--bg-card2);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 6px 16px;
  flex: 1;
  max-width: 600px;
  transition: var(--transition);
}
.search-form:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255,107,53,0.15);
}
.search-form input {
  background: none;
  border: none;
  outline: none;
  color: var(--text);
  font-size: 14px;
  flex: 1;
  padding: 2px 8px;
}
.search-form input::placeholder { color: var(--text-muted); }
.search-form button {
  color: var(--primary);
  font-size: 16px;
  padding: 4px;
  transition: var(--transition);
}
.search-form button:hover { color: var(--primary-light); }
.search-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.search-tag {
  font-size: 12px;
  color: var(--text-muted);
  background: rgba(255,107,53,0.08);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 3px 10px;
  cursor: pointer;
  transition: var(--transition);
}
.search-tag:hover { color: var(--primary); border-color: var(--primary); }

/* === Hero区域 === */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_bg_raw.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
  transform: scale(1.02);
  transition: transform 8s ease;
}
.hero:hover .hero-bg { transform: scale(1.05); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(15,20,25,0.9) 0%,
    rgba(0,78,137,0.4) 50%,
    rgba(255,107,53,0.2) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 20px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,107,53,0.15);
  border: 1px solid rgba(255,107,53,0.4);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--primary);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
  color: var(--text-bright);
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--primary) 0%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  box-shadow: var(--shadow-orange);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(255,107,53,0.5);
}
.btn-outline {
  border: 1px solid rgba(255,255,255,0.3);
  color: var(--text);
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(255,107,53,0.08);
}
.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  display: block;
}
.hero-stat .label {
  font-size: 12px;
  color: var(--text-muted);
}

/* === 通用section === */
.section {
  padding: 72px 0;
}
.section-alt {
  background: rgba(26, 32, 48, 0.5);
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  background: rgba(255,107,53,0.1);
  border: 1px solid rgba(255,107,53,0.3);
  color: var(--primary);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 12px;
  margin-bottom: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 12px;
}
.section-title .accent { color: var(--primary); }
.section-desc {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 560px;
  margin: 0 auto;
}

/* === 视频卡片 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-orange);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--bg-card2);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
}
.video-card:hover .video-play-btn {
  background: rgba(0,0,0,0.4);
}
.play-icon {
  width: 52px;
  height: 52px;
  background: rgba(255,107,53,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0.8);
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(255,107,53,0.6);
}
.video-card:hover .play-icon {
  opacity: 1;
  transform: scale(1);
}
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 9px 0 9px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff;
  font-size: 11px;
  padding: 2px 6px;
  border-radius: 4px;
}
.video-tag-badge {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}
.video-info {
  padding: 14px;
}
.video-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 8px;
  line-height: 1.5;
  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-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-stats {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
}
.video-stats span { display: flex; align-items: center; gap: 3px; }

/* === 特性卡片 === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
}
.feature-card:hover {
  border-color: var(--primary);
  transform: translateY(-3px);
  box-shadow: var(--shadow-orange);
}
.feature-icon {
  font-size: 36px;
  margin-bottom: 12px;
  display: block;
}
.feature-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 8px;
}
.feature-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* === AI赋能区域 === */
.ai-section {
  background: linear-gradient(135deg, rgba(0,78,137,0.3) 0%, rgba(15,20,25,0.9) 50%, rgba(255,107,53,0.1) 100%);
  position: relative;
  overflow: hidden;
}
.ai-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at center, rgba(0,217,255,0.05) 0%, transparent 60%);
  animation: pulse-bg 6s ease-in-out infinite;
}
@keyframes pulse-bg {
  0%, 100% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.1); opacity: 1; }
}
.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.ai-features { display: flex; flex-direction: column; gap: 20px; }
.ai-feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 20px;
  background: rgba(26,32,48,0.8);
  border-radius: var(--radius);
  border: 1px solid var(--border-blue);
  transition: var(--transition);
}
.ai-feature-item:hover {
  border-color: var(--neon);
  box-shadow: 0 4px 20px rgba(0,217,255,0.15);
}
.ai-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--blue) 0%, var(--neon) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}
.ai-feature-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
  margin-bottom: 6px;
}
.ai-feature-item p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}
.ai-visual {
  position: relative;
}
.ai-visual img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-blue);
  width: 100%;
}

/* === 专家展示 === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.expert-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--gold) 100%);
}
.expert-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-orange);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 14px;
  border: 3px solid var(--primary);
  object-fit: cover;
}
.expert-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 4px;
}
.expert-role {
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}
.expert-awards {
  font-size: 12px;
  color: var(--gold);
  margin-bottom: 14px;
}
.expert-social {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 14px;
}
.expert-social a {
  font-size: 11px;
  color: var(--text-muted);
  background: var(--bg-card2);
  padding: 3px 8px;
  border-radius: 6px;
  border: 1px solid var(--border);
}
.expert-social a:hover { color: var(--primary); border-color: var(--primary); }
.expert-actions {
  display: flex;
  gap: 8px;
  justify-content: center;
}
.btn-sm {
  font-size: 12px;
  padding: 6px 14px;
  border-radius: 6px;
  font-weight: 500;
  transition: var(--transition);
}
.btn-sm-primary {
  background: var(--primary);
  color: #fff;
}
.btn-sm-primary:hover { background: var(--primary-dark); color: #fff; }
.btn-sm-outline {
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn-sm-outline:hover { border-color: var(--primary); color: var(--primary); }

/* === 合作品牌 === */
.brand-wall {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.brand-logo-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}
.brand-logo-item:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.brand-logo-item img {
  height: 40px;
  width: auto;
  filter: brightness(0.8);
  transition: var(--transition);
}
.brand-logo-item:hover img { filter: brightness(1.2); }

/* === 用户评价 === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  transition: var(--transition);
}
.review-card:hover {
  border-color: var(--primary);
  transform: translateY(-2px);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--primary);
}
.review-user-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-bright);
}
.review-date {
  font-size: 12px;
  color: var(--text-muted);
}
.review-stars {
  color: var(--gold);
  font-size: 13px;
  margin-bottom: 10px;
}
.review-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
}
.review-tag {
  display: inline-block;
  font-size: 11px;
  color: var(--primary);
  background: rgba(255,107,53,0.1);
  border-radius: 4px;
  padding: 2px 8px;
  margin-top: 10px;
}

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--primary); }
.faq-question {
  padding: 18px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-bright);
  gap: 12px;
}
.faq-question::after {
  content: '+';
  color: var(--primary);
  font-size: 20px;
  font-weight: 300;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item.open .faq-question::after { content: '−'; }
.faq-answer {
  display: none;
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px solid var(--border);
}
.faq-item.open .faq-answer { display: block; }

/* === 联系我们 === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.contact-info-block h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.contact-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,107,53,0.08);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon {
  width: 40px;
  height: 40px;
  background: rgba(255,107,53,0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.contact-label { font-size: 12px; color: var(--text-muted); margin-bottom: 2px; }
.contact-value { font-size: 14px; color: var(--text-bright); font-weight: 500; }
.qrcode-group {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}
.qrcode-item { text-align: center; }
.qrcode-item img {
  width: 120px;
  height: 120px;
  border-radius: 10px;
  border: 2px solid var(--border);
  margin-bottom: 8px;
}
.qrcode-item p { font-size: 12px; color: var(--text-muted); }

/* === 社区加入指南 === */
.join-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  counter-reset: step;
}
.join-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  position: relative;
  transition: var(--transition);
}
.join-step:hover { border-color: var(--primary); transform: translateY(-3px); }
.join-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}
.join-step-icon { font-size: 32px; margin-bottom: 10px; margin-top: 8px; }
.join-step h4 { font-size: 14px; font-weight: 600; color: var(--text-bright); margin-bottom: 6px; }
.join-step p { font-size: 13px; color: var(--text-muted); }

/* === 分享按钮 === */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.share-label { font-size: 13px; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  transition: var(--transition);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.share-btn:hover { border-color: var(--primary); color: var(--primary); }
.share-btn.weixin:hover { border-color: #07C160; color: #07C160; }
.share-btn.weibo:hover { border-color: #E6162D; color: #E6162D; }
.share-btn.douyin:hover { border-color: #FE2C55; color: #FE2C55; }
.share-btn.bilibili:hover { border-color: #00A1D6; color: #00A1D6; }

/* === 底部 === */
.site-footer {
  background: rgba(10, 14, 20, 0.98);
  border-top: 1px solid var(--border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .brand-name {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
}
.footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}
.footer-bottom a { color: var(--primary); }
.update-time {
  font-size: 12px;
  color: var(--text-muted);
  background: rgba(255,107,53,0.08);
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid var(--border);
}

/* === 视频模态框 === */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0,0,0,0.9);
  align-items: center;
  justify-content: center;
}
.video-modal.active { display: flex; }
.modal-inner {
  position: relative;
  width: 90%;
  max-width: 900px;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 80px rgba(0,0,0,0.8);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
}
.modal-title { font-size: 15px; font-weight: 600; color: var(--text-bright); }
.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: var(--text);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}
.modal-close:hover { background: var(--primary); color: #fff; }
.modal-video {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
}
.modal-video video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.modal-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-muted);
}
.modal-placeholder .big-play {
  width: 80px;
  height: 80px;
  background: rgba(255,107,53,0.2);
  border: 2px solid var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
}

/* === 面包屑 === */
.breadcrumb {
  padding: 12px 0;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: var(--border); }
.breadcrumb .current { color: var(--primary); }

/* === 分页 === */
.pagination {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}
.page-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  cursor: pointer;
}
.page-btn:hover, .page-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

/* === 标签云 === */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tag-item {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 12px;
  transition: var(--transition);
  cursor: pointer;
}
.tag-item:hover { color: var(--primary); border-color: var(--primary); }

/* === 数据统计条 === */
.stats-bar {
  background: linear-gradient(135deg, var(--blue) 0%, var(--bg-card2) 100%);
  padding: 32px 0;
  border-top: 1px solid var(--border-blue);
  border-bottom: 1px solid var(--border-blue);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}
.stat-item .num {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  display: block;
  margin-bottom: 4px;
}
.stat-item .label {
  font-size: 13px;
  color: var(--text-muted);
}

/* === 内页侧边栏 === */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}
.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
}
.sidebar-widget h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.hot-list { display: flex; flex-direction: column; gap: 10px; }
.hot-item {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid rgba(255,107,53,0.06);
}
.hot-item:last-child { border-bottom: none; }
.hot-num {
  width: 20px;
  height: 20px;
  background: var(--bg-card2);
  border-radius: 4px;
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.hot-item:nth-child(-n+3) .hot-num {
  background: var(--primary);
  color: #fff;
}
.hot-title { font-size: 13px; color: var(--text); line-height: 1.4; }
.hot-title:hover { color: var(--primary); }

/* === 响应式 === */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .page-layout { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .site-nav { display: none; }
  .site-nav.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(15,20,25,0.98);
    padding: 16px;
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }
  .hamburger { display: flex; }
  .hero { min-height: 420px; }
  .hero h1 { font-size: 1.8rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .search-tags { display: none; }
  .hero-stats { gap: 20px; }
  .hero-stat .num { font-size: 22px; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { width: 100%; justify-content: center; }
}

/* === 动画 === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease forwards; }
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }

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

/* === 视频标签 === */
.video-label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255,107,53,0.15);
  border: 1px solid rgba(255,107,53,0.3);
  color: var(--primary);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 12px;
}

/* === 内页Hero === */
.page-hero {
  background: linear-gradient(135deg, var(--bg-card2) 0%, var(--bg-dark) 100%);
  padding: 48px 0 32px;
  border-bottom: 1px solid var(--border);
}
.page-hero h1 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 8px;
}
.page-hero p { font-size: 15px; color: var(--text-muted); }

/* === 工具卡片 === */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}
.tool-card:hover { border-color: var(--primary); transform: translateY(-3px); box-shadow: var(--shadow-orange); }
.tool-icon { font-size: 40px; margin-bottom: 12px; }
.tool-name { font-size: 16px; font-weight: 700; color: var(--text-bright); margin-bottom: 8px; }
.tool-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.tool-use-btn {
  display: inline-block;
  background: rgba(255,107,53,0.1);
  border: 1px solid var(--border);
  color: var(--primary);
  font-size: 13px;
  padding: 6px 16px;
  border-radius: 6px;
  transition: var(--transition);
}
.tool-use-btn:hover { background: var(--primary); color: #fff; }

/* === 社区帖子 === */
.post-list { display: flex; flex-direction: column; gap: 16px; }
.post-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  gap: 16px;
  transition: var(--transition);
}
.post-item:hover { border-color: var(--primary); }
.post-avatar { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.post-content { flex: 1; }
.post-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.post-author { font-size: 14px; font-weight: 600; color: var(--text-bright); }
.post-time { font-size: 12px; color: var(--text-muted); }
.post-title { font-size: 15px; font-weight: 600; color: var(--text-bright); margin-bottom: 6px; }
.post-title:hover { color: var(--primary); }
.post-excerpt { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 10px; }
.post-footer { display: flex; gap: 16px; font-size: 12px; color: var(--text-muted); }
.post-footer span { display: flex; align-items: center; gap: 4px; }