/* =====================================================
   91 修车改装视频社区 - 主样式表
   Brand: 91 | Domain: wfnd6m.cn
   完全原创设计 | 百度SEO EEAT优化
   ===================================================== */

/* ---- 自定义变量 ---- */
:root {
  --c-orange: #f05a1a;
  --c-orange-dark: #c94510;
  --c-orange-light: #ff7a3d;
  --c-dark: #111318;
  --c-dark2: #1a1e26;
  --c-dark3: #22272f;
  --c-steel: #2c3340;
  --c-steel2: #3a4255;
  --c-gray: #6b7280;
  --c-gray2: #9ca3af;
  --c-light: #f3f4f6;
  --c-white: #ffffff;
  --c-border: rgba(255,255,255,0.08);
  --c-border2: rgba(255,255,255,0.14);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.18);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.28);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.38);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --font-main: 'PingFang SC','Microsoft YaHei','Helvetica Neue',Arial,sans-serif;
  --transition: 0.28s cubic-bezier(0.4,0,0.2,1);
}

/* ---- 重置 ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-main);
  background: var(--c-dark);
  color: var(--c-light);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ---- 通用容器 ---- */
.g-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}
.g-section {
  padding: 72px 0;
}
.g-section-sm {
  padding: 48px 0;
}

/* ---- 通用标题 ---- */
.g-heading {
  text-align: center;
  margin-bottom: 48px;
}
.g-heading h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--c-white);
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.g-heading h2 span {
  color: var(--c-orange);
}
.g-heading p {
  margin-top: 12px;
  color: var(--c-gray2);
  font-size: 1rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.g-divider {
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-orange-light));
  border-radius: 2px;
  margin: 14px auto 0;
}

/* ---- 按钮 ---- */
.g-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.g-btn-primary {
  background: linear-gradient(135deg, var(--c-orange), var(--c-orange-dark));
  color: var(--c-white);
  box-shadow: 0 4px 16px rgba(240,90,26,0.35);
}
.g-btn-primary:hover {
  background: linear-gradient(135deg, var(--c-orange-light), var(--c-orange));
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(240,90,26,0.5);
}
.g-btn-outline {
  border: 1.5px solid var(--c-border2);
  color: var(--c-gray2);
  background: transparent;
}
.g-btn-outline:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
  background: rgba(240,90,26,0.06);
}
.g-btn-ghost {
  color: var(--c-orange);
  font-size: 0.9rem;
  padding: 8px 0;
}
.g-btn-ghost:hover { text-decoration: underline; }

/* ---- 标签 ---- */
.g-tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(240,90,26,0.15);
  color: var(--c-orange-light);
  border: 1px solid rgba(240,90,26,0.25);
}
.g-tag-blue {
  background: rgba(59,130,246,0.15);
  color: #60a5fa;
  border-color: rgba(59,130,246,0.25);
}
.g-tag-green {
  background: rgba(34,197,94,0.15);
  color: #4ade80;
  border-color: rgba(34,197,94,0.25);
}

/* =====================================================
   顶部通知栏
   ===================================================== */
.top-notice {
  background: linear-gradient(90deg, var(--c-orange-dark), var(--c-orange));
  padding: 8px 0;
  text-align: center;
  font-size: 0.82rem;
  color: var(--c-white);
  font-weight: 500;
  letter-spacing: 0.02em;
}
.top-notice a { color: #ffe0cc; text-decoration: underline; }

/* =====================================================
   头部导航
   ===================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(17,19,24,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  transition: var(--transition);
}
.site-header.scrolled {
  box-shadow: var(--shadow-md);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}
/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.site-logo img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.logo-text-wrap {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.logo-brand {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--c-white);
  letter-spacing: -0.03em;
}
.logo-brand span { color: var(--c-orange); }
.logo-tagline {
  font-size: 0.68rem;
  color: var(--c-gray);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}
.nav-item {
  position: relative;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--c-gray2);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--c-white);
  background: rgba(255,255,255,0.06);
}
.nav-link.active { color: var(--c-orange); }
.nav-arrow {
  font-size: 0.65rem;
  transition: transform var(--transition);
}
.nav-item:hover .nav-arrow { transform: rotate(180deg); }
/* 下拉菜单 */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 200px;
  background: var(--c-dark2);
  border: 1px solid var(--c-border2);
  border-radius: var(--radius-md);
  padding: 8px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: var(--transition);
  z-index: 100;
}
.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.nav-dropdown a {
  display: block;
  padding: 9px 14px;
  font-size: 0.88rem;
  color: var(--c-gray2);
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.nav-dropdown a:hover {
  color: var(--c-white);
  background: rgba(255,255,255,0.06);
}
/* 头部右侧 */
.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.header-search-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: var(--c-gray2);
  transition: var(--transition);
  background: rgba(255,255,255,0.05);
}
.header-search-btn:hover { color: var(--c-white); background: rgba(255,255,255,0.1); }
/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}
.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-gray2);
  border-radius: 2px;
  transition: var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* =====================================================
   搜索栏（导航下方）
   ===================================================== */
.search-bar-wrap {
  background: var(--c-dark2);
  border-bottom: 1px solid var(--c-border);
  padding: 12px 0;
}
.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-input-box {
  flex: 1;
  display: flex;
  align-items: center;
  background: var(--c-dark3);
  border: 1px solid var(--c-border2);
  border-radius: 40px;
  padding: 0 16px;
  gap: 10px;
  transition: var(--transition);
}
.search-input-box:focus-within {
  border-color: var(--c-orange);
  box-shadow: 0 0 0 3px rgba(240,90,26,0.12);
}
.search-input-box svg {
  color: var(--c-gray);
  flex-shrink: 0;
}
.search-input-box input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: var(--c-white);
  font-size: 0.92rem;
  padding: 10px 0;
}
.search-input-box input::placeholder { color: var(--c-gray); }
.search-submit {
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--c-orange), var(--c-orange-dark));
  color: var(--c-white);
  border-radius: 40px;
  font-size: 0.88rem;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.search-submit:hover { opacity: 0.88; }
.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--c-gray);
}
.search-hot-tags span { color: var(--c-gray2); }
.search-hot-tags a {
  color: var(--c-gray2);
  transition: var(--transition);
}
.search-hot-tags a:hover { color: var(--c-orange); }

/* =====================================================
   Hero Banner
   ===================================================== */
.hero-section {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    105deg,
    rgba(17,19,24,0.92) 0%,
    rgba(17,19,24,0.75) 50%,
    rgba(17,19,24,0.35) 100%
  );
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  background: rgba(240,90,26,0.18);
  border: 1px solid rgba(240,90,26,0.35);
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--c-orange-light);
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}
.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--c-orange);
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--c-white);
  letter-spacing: -0.03em;
  margin-bottom: 16px;
}
.hero-content h1 em {
  font-style: normal;
  color: var(--c-orange);
}
.hero-desc {
  font-size: 1.05rem;
  color: var(--c-gray2);
  line-height: 1.75;
  margin-bottom: 28px;
  max-width: 540px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-stats {
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.hero-stat {
  display: flex;
  flex-direction: column;
}
.hero-stat-num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--c-white);
  line-height: 1;
}
.hero-stat-num span { color: var(--c-orange); }
.hero-stat-label {
  font-size: 0.78rem;
  color: var(--c-gray);
  margin-top: 4px;
}

/* =====================================================
   分类导航
   ===================================================== */
.cat-nav-section {
  background: var(--c-dark2);
  border-bottom: 1px solid var(--c-border);
  padding: 0;
}
.cat-nav-inner {
  display: flex;
  gap: 0;
  overflow-x: auto;
  scrollbar-width: none;
}
.cat-nav-inner::-webkit-scrollbar { display: none; }
.cat-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 16px 24px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--c-gray2);
  white-space: nowrap;
  border-bottom: 3px solid transparent;
  transition: var(--transition);
  cursor: pointer;
}
.cat-nav-item:hover, .cat-nav-item.active {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}
.cat-nav-icon {
  font-size: 1.3rem;
  line-height: 1;
}

/* =====================================================
   视频卡片
   ===================================================== */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}
.video-card {
  background: var(--c-dark2);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--c-border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  border-color: var(--c-border2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--c-dark3);
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s 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);
  opacity: 0;
}
.video-card:hover .video-play-btn {
  opacity: 1;
  background: rgba(0,0,0,0.45);
}
.play-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--c-orange), var(--c-orange-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: scale(0.8);
  transition: transform var(--transition);
  box-shadow: 0 4px 20px rgba(240,90,26,0.5);
}
.video-card:hover .play-icon { transform: scale(1); }
.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #fff;
  margin-left: 4px;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: var(--c-white);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-quality {
  position: absolute;
  top: 8px;
  left: 8px;
}
.video-info {
  padding: 14px 16px;
}
.video-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--c-white);
  line-height: 1.45;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--c-gray);
}
.video-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}
.video-tags-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}

/* =====================================================
   修车传媒模块（六大子模块）
   ===================================================== */
.media-modules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.media-module-card {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}
.media-module-card:hover {
  border-color: var(--c-orange);
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(240,90,26,0.15);
}
.media-module-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  position: relative;
}
.media-module-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.media-module-card:hover .media-module-img img { transform: scale(1.07); }
.media-module-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.65) 0%, transparent 60%);
}
.media-module-count {
  position: absolute;
  bottom: 8px;
  left: 12px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.8);
}
.media-module-info {
  padding: 14px 16px;
}
.media-module-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 4px;
}
.media-module-info p {
  font-size: 0.78rem;
  color: var(--c-gray);
  line-height: 1.5;
}

/* =====================================================
   娱乐专区
   ===================================================== */
.ent-section {
  background: var(--c-dark2);
}
.ent-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 16px;
}
.ent-main-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16/9;
  cursor: pointer;
}
.ent-main-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.ent-main-card:hover img { transform: scale(1.04); }
.ent-main-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 55%);
}
.ent-main-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
}
.ent-main-info h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 6px;
}
.ent-main-info p {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.75);
}
.ent-side-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ent-side-card {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  flex: 1;
}
.ent-side-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.ent-side-card:hover img { transform: scale(1.06); }
.ent-side-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, transparent 60%);
}
.ent-side-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 12px 14px;
}
.ent-side-info h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--c-white);
}
.ent-side-info span {
  font-size: 0.72rem;
  color: rgba(255,255,255,0.65);
}
/* 娱乐专区播放按钮 */
.ent-play {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}
.ent-main-card:hover .ent-play,
.ent-side-card:hover .ent-play { opacity: 1; }

/* =====================================================
   AI赋能板块
   ===================================================== */
.ai-section {
  background: linear-gradient(135deg, var(--c-dark) 0%, var(--c-dark3) 100%);
  position: relative;
  overflow: hidden;
}
.ai-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(240,90,26,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.ai-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.ai-visual {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.ai-visual img {
  width: 100%;
  border-radius: var(--radius-lg);
}
.ai-visual-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(240,90,26,0.9);
  color: var(--c-white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 20px;
  letter-spacing: 0.04em;
}
.ai-features-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 28px;
}
.ai-feat-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}
.ai-feat-icon {
  width: 44px;
  height: 44px;
  background: rgba(240,90,26,0.12);
  border: 1px solid rgba(240,90,26,0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}
.ai-feat-text h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 4px;
}
.ai-feat-text p {
  font-size: 0.82rem;
  color: var(--c-gray2);
  line-height: 1.6;
}

/* =====================================================
   社区功能
   ===================================================== */
.community-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.comm-card {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.comm-card:hover {
  border-color: var(--c-orange);
  background: rgba(240,90,26,0.05);
  transform: translateY(-3px);
}
.comm-icon {
  font-size: 2rem;
  margin-bottom: 12px;
  display: block;
}
.comm-card h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 6px;
}
.comm-card p {
  font-size: 0.78rem;
  color: var(--c-gray);
  line-height: 1.55;
}
.comm-live-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 10px;
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.3);
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 700;
  color: #f87171;
  margin-top: 8px;
}
.live-dot {
  width: 6px;
  height: 6px;
  background: #ef4444;
  border-radius: 50%;
  animation: pulse 1.2s infinite;
}

/* =====================================================
   专家团队
   ===================================================== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.expert-card {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.expert-card:hover {
  border-color: var(--c-border2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.expert-photo {
  aspect-ratio: 1/1;
  overflow: hidden;
  position: relative;
}
.expert-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.expert-card:hover .expert-photo img { transform: scale(1.05); }
.expert-body {
  padding: 20px;
}
.expert-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 4px;
}
.expert-role {
  font-size: 0.8rem;
  color: var(--c-orange);
  font-weight: 600;
  margin-bottom: 10px;
}
.expert-desc {
  font-size: 0.82rem;
  color: var(--c-gray2);
  line-height: 1.6;
  margin-bottom: 14px;
}
.expert-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.expert-actions {
  display: flex;
  gap: 10px;
}
.expert-stat-row {
  display: flex;
  gap: 16px;
  margin-bottom: 14px;
}
.expert-stat {
  display: flex;
  flex-direction: column;
}
.expert-stat-num {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-white);
}
.expert-stat-label {
  font-size: 0.7rem;
  color: var(--c-gray);
}

/* =====================================================
   合作品牌
   ===================================================== */
.partners-section {
  background: var(--c-dark2);
}
.partners-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 12px;
}
.partner-item {
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 16px 12px;
  text-align: center;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--c-gray2);
  transition: var(--transition);
  cursor: pointer;
}
.partner-item:hover {
  border-color: var(--c-orange);
  color: var(--c-orange);
  background: rgba(240,90,26,0.05);
}

/* =====================================================
   How-To 加入社区
   ===================================================== */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
}
.howto-steps::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-orange), rgba(240,90,26,0.2));
  z-index: 0;
}
.howto-step {
  text-align: center;
  position: relative;
  z-index: 1;
}
.step-num {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--c-orange), var(--c-orange-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--c-white);
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(240,90,26,0.35);
}
.howto-step h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 8px;
}
.howto-step p {
  font-size: 0.8rem;
  color: var(--c-gray2);
  line-height: 1.6;
}

/* =====================================================
   用户评论
   ===================================================== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.review-card {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: var(--transition);
}
.review-card:hover {
  border-color: var(--c-border2);
  transform: translateY(-2px);
}
.review-stars {
  color: #fbbf24;
  font-size: 0.9rem;
  margin-bottom: 10px;
  letter-spacing: 2px;
}
.review-text {
  font-size: 0.85rem;
  color: var(--c-gray2);
  line-height: 1.7;
  margin-bottom: 14px;
}
.reviewer {
  display: flex;
  align-items: center;
  gap: 10px;
}
.reviewer-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--c-orange), var(--c-orange-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--c-white);
  flex-shrink: 0;
}
.reviewer-name {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--c-white);
}
.reviewer-info {
  font-size: 0.72rem;
  color: var(--c-gray);
}

/* =====================================================
   FAQ
   ===================================================== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.faq-item {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item.open { border-color: var(--c-orange); }
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--c-white);
  gap: 12px;
}
.faq-q:hover { color: var(--c-orange); }
.faq-arrow {
  width: 24px;
  height: 24px;
  background: rgba(255,255,255,0.06);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-arrow { transform: rotate(180deg); background: rgba(240,90,26,0.15); color: var(--c-orange); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-item.open .faq-a { max-height: 300px; }
.faq-a-inner {
  padding: 0 20px 18px;
  font-size: 0.88rem;
  color: var(--c-gray2);
  line-height: 1.75;
  border-top: 1px solid var(--c-border);
  padding-top: 14px;
}

/* =====================================================
   最新资讯
   ===================================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.news-card {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}
.news-card:hover {
  border-color: var(--c-border2);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.news-img {
  aspect-ratio: 16/9;
  overflow: hidden;
}
.news-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-img img { transform: scale(1.05); }
.news-body {
  padding: 16px;
}
.news-cat {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--c-orange);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}
.news-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.45;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  font-size: 0.75rem;
  color: var(--c-gray);
}

/* =====================================================
   标签云
   ===================================================== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.tc-tag {
  padding: 6px 16px;
  border-radius: 20px;
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  font-size: 0.82rem;
  color: var(--c-gray2);
  transition: var(--transition);
  cursor: pointer;
}
.tc-tag:hover { border-color: var(--c-orange); color: var(--c-orange); background: rgba(240,90,26,0.06); }
.tc-xl { font-size: 1rem; font-weight: 700; }
.tc-lg { font-size: 0.9rem; font-weight: 600; }
.tc-md { font-size: 0.82rem; }
.tc-sm { font-size: 0.75rem; }

/* =====================================================
   联系我们
   ===================================================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}
.contact-info-block {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 28px;
}
.contact-info-block h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--c-border);
}
.contact-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 12px 0;
  border-bottom: 1px solid var(--c-border);
}
.contact-item:last-child { border-bottom: none; }
.contact-icon {
  width: 38px;
  height: 38px;
  background: rgba(240,90,26,0.12);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}
.contact-label {
  font-size: 0.75rem;
  color: var(--c-gray);
  margin-bottom: 2px;
}
.contact-value {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--c-white);
}
.qr-codes {
  display: flex;
  gap: 20px;
  margin-top: 20px;
}
.qr-item {
  text-align: center;
}
.qr-item img {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
  border: 2px solid var(--c-border2);
  margin-bottom: 6px;
}
.qr-item span {
  font-size: 0.72rem;
  color: var(--c-gray);
  display: block;
}
.community-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.comm-link-item {
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
}
.comm-link-item:hover {
  border-color: var(--c-orange);
  background: rgba(240,90,26,0.05);
}
.comm-link-icon { font-size: 1.5rem; margin-bottom: 6px; }
.comm-link-name { font-size: 0.85rem; font-weight: 600; color: var(--c-white); margin-bottom: 2px; }
.comm-link-desc { font-size: 0.72rem; color: var(--c-gray); }

/* =====================================================
   社交分享
   ===================================================== */
.share-bar {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
  border-bottom: 1px solid var(--c-border);
  padding: 16px 0;
}
.share-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.share-label {
  font-size: 0.85rem;
  color: var(--c-gray2);
  font-weight: 500;
  flex-shrink: 0;
}
.share-btns {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.share-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid var(--c-border);
  color: var(--c-gray2);
  background: var(--c-dark3);
}
.share-btn:hover { border-color: var(--c-border2); color: var(--c-white); }
.share-btn-wx:hover { border-color: #07c160; color: #07c160; }
.share-btn-wb:hover { border-color: #e6162d; color: #e6162d; }
.share-btn-dy:hover { border-color: #fe2c55; color: #fe2c55; }
.share-btn-bili:hover { border-color: #00a1d6; color: #00a1d6; }

/* =====================================================
   页脚
   ===================================================== */
.site-footer {
  background: var(--c-dark2);
  border-top: 1px solid var(--c-border);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--c-border);
}
.footer-brand-col {}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo img {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  object-fit: cover;
}
.footer-logo-text {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--c-white);
}
.footer-logo-text span { color: var(--c-orange); }
.footer-desc {
  font-size: 0.82rem;
  color: var(--c-gray);
  line-height: 1.75;
  margin-bottom: 20px;
}
.footer-socials {
  display: flex;
  gap: 10px;
}
.footer-social-btn {
  width: 34px;
  height: 34px;
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--c-gray2);
  transition: var(--transition);
}
.footer-social-btn:hover { border-color: var(--c-orange); color: var(--c-orange); }
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--c-white);
  margin-bottom: 16px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 0.82rem;
  color: var(--c-gray);
  transition: var(--transition);
}
.footer-links a:hover { color: var(--c-orange); }
.footer-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.footer-tag {
  font-size: 0.72rem;
  color: var(--c-gray);
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  border-radius: 4px;
  padding: 3px 8px;
  transition: var(--transition);
}
.footer-tag:hover { color: var(--c-orange); border-color: rgba(240,90,26,0.3); }
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copyright {
  font-size: 0.78rem;
  color: var(--c-gray);
}
.footer-copyright a { color: var(--c-gray2); }
.footer-copyright a:hover { color: var(--c-orange); }
.footer-update {
  font-size: 0.75rem;
  color: var(--c-gray);
}

/* =====================================================
   面包屑
   ===================================================== */
.breadcrumb-wrap {
  padding: 14px 0;
  border-bottom: 1px solid var(--c-border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--c-gray);
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--c-gray2); transition: var(--transition); }
.breadcrumb a:hover { color: var(--c-orange); }
.breadcrumb-sep { color: var(--c-gray); font-size: 0.65rem; }
.breadcrumb-current { color: var(--c-white); }

/* =====================================================
   内页 Banner
   ===================================================== */
.inner-banner {
  position: relative;
  padding: 60px 0;
  overflow: hidden;
  background: var(--c-dark2);
}
.inner-banner-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.inner-banner-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}
.inner-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(17,19,24,0.95) 0%, rgba(17,19,24,0.7) 100%);
  z-index: 1;
}
.inner-banner-content {
  position: relative;
  z-index: 2;
}
.inner-banner-content h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: var(--c-white);
  margin-bottom: 12px;
}
.inner-banner-content h1 span { color: var(--c-orange); }
.inner-banner-content p {
  font-size: 1rem;
  color: var(--c-gray2);
  max-width: 560px;
}

/* =====================================================
   移动端响应式
   ===================================================== */
@media (max-width: 1100px) {
  .video-grid-4 { grid-template-columns: repeat(3, 1fr); }
  .media-modules-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(4, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .g-section { padding: 48px 0; }
  .main-nav { display: none; }
  .main-nav.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--c-dark2);
    padding: 20px;
    overflow-y: auto;
    z-index: 999;
    gap: 4px;
  }
  .main-nav.mobile-open .nav-link { padding: 14px 16px; font-size: 1rem; }
  .main-nav.mobile-open .nav-dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    background: rgba(255,255,255,0.03);
    margin-top: 4px;
  }
  .menu-toggle { display: flex; }
  .header-right .g-btn { display: none; }
  .hero-section { min-height: 420px; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-stats { gap: 20px; }
  .video-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .media-modules-grid { grid-template-columns: 1fr; }
  .ent-grid { grid-template-columns: 1fr; }
  .ai-layout { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: repeat(2, 1fr); }
  .experts-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .howto-steps::before { display: none; }
  .reviews-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-layout { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .search-bar-inner { flex-direction: column; }
  .share-inner { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .video-grid-4 { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-actions { flex-direction: column; }
  .qr-codes { justify-content: center; }
}

/* =====================================================
   懒加载占位
   ===================================================== */
img[data-src] {
  background: var(--c-dark3);
  min-height: 80px;
}

/* =====================================================
   滚动条美化
   ===================================================== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--c-dark2); }
::-webkit-scrollbar-thumb { background: var(--c-steel2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--c-orange); }

/* =====================================================
   选中文字颜色
   ===================================================== */
::selection { background: rgba(240,90,26,0.3); color: var(--c-white); }