/* ============================================
   色虎视频 - 全站样式表
   品牌：色虎视频 | 域名：nm702063.cn
   定位：国内影视传媒公司+视频社区
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --primary: #E8432A;
  --primary-dark: #C73620;
  --accent: #FF6B35;
  --bg-dark: #0F0F1A;
  --bg-card: #1C1C30;
  --bg-card-hover: #252545;
  --text-white: #FFFFFF;
  --text-gray: #B8B8CC;
  --text-muted: #8888A0;
  --border-color: #2A2A45;
  --gradient-primary: linear-gradient(135deg, #E8432A, #FF6B35);
  --gradient-dark: linear-gradient(180deg, #0F0F1A, #1A1A2E);
  --shadow-card: 0 4px 20px rgba(0,0,0,0.3);
  --shadow-hover: 0 8px 32px rgba(232,67,42,0.2);
  --radius: 12px;
  --radius-sm: 8px;
  --transition: all 0.3s ease;
  --max-width: 1280px;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-dark);
  color: var(--text-white);
  line-height: 1.7;
  overflow-x: hidden;
}

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

a:hover {
  color: var(--primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* === 顶部导航栏 === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(15,15,26,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-wrap img {
  height: 40px;
  width: auto;
}

.logo-wrap .brand-text {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  color: var(--text-gray);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--text-white);
  background: rgba(232,67,42,0.15);
}

/* 搜索框 */
.search-bar {
  max-width: 700px;
  margin: 0 auto;
  padding: 12px 20px;
  background: rgba(28,28,48,0.6);
  border-bottom: 1px solid var(--border-color);
}

.search-bar-inner {
  display: flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  overflow: hidden;
  max-width: 600px;
  margin: 0 auto;
}

.search-bar-inner input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-white);
  padding: 10px 18px;
  font-size: 0.9rem;
}

.search-bar-inner input::placeholder {
  color: var(--text-muted);
}

.search-bar-inner button {
  background: var(--gradient-primary);
  border: none;
  color: white;
  padding: 10px 22px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: var(--transition);
}

.search-bar-inner button:hover {
  opacity: 0.9;
}

/* 汉堡菜单 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-white);
  transition: var(--transition);
}

/* === 英雄横幅 === */
.hero-section {
  position: relative;
  padding: 120px 0 60px;
  overflow: hidden;
  background: var(--gradient-dark);
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../images/hero-banner.jpg') center/cover no-repeat;
  opacity: 0.25;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 40px 20px;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-content h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-gray);
  max-width: 680px;
  margin: 0 auto 30px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient-primary);
  color: white;
  padding: 14px 32px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  color: white;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text-white);
  padding: 14px 32px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

/* === 通用板块标题 === */
.section-title {
  text-align: center;
  margin-bottom: 48px;
}

.section-title h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-title h2 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title p {
  color: var(--text-gray);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* === 视频卡片网格 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid var(--border-color);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.video-card:hover .video-thumb img {
  transform: scale(1.05);
}

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 56px;
  height: 56px;
  background: rgba(232,67,42,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  opacity: 0;
}

.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);
  opacity: 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: 500;
}

.video-info {
  padding: 16px;
}

.video-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.82rem;
}

.video-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* === 内容板块 === */
.content-section {
  padding: 80px 0;
}

.content-section:nth-child(even) {
  background: rgba(28,28,48,0.3);
}

/* === 服务/功能卡片 === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  text-align: center;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.8rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* === 专家团队 === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  transition: var(--transition);
}

.expert-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-primary);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: white;
}

.expert-card h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.expert-card .role {
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.expert-card .desc {
  color: var(--text-gray);
  font-size: 0.85rem;
  line-height: 1.5;
  margin-bottom: 14px;
}

.expert-card .expert-btns {
  display: flex;
  gap: 8px;
  justify-content: center;
}

.expert-card .expert-btns a {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
  color: var(--text-gray);
  transition: var(--transition);
}

.expert-card .expert-btns a:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* === 合作品牌Logo墙 === */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
  align-items: center;
}

.partner-logos .partner-item {
  width: 140px;
  height: 60px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  transition: var(--transition);
}

.partner-logos .partner-item:hover {
  border-color: var(--primary);
  color: var(--accent);
}

/* === 用户评价 === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--primary);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: white;
  flex-shrink: 0;
}

.review-user h4 {
  font-size: 0.95rem;
  margin-bottom: 2px;
}

.review-user .stars {
  color: #FFB800;
  font-size: 0.85rem;
}

.review-card .review-text {
  color: var(--text-gray);
  font-size: 0.9rem;
  line-height: 1.7;
  font-style: italic;
}

.review-card .review-date {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 10px;
}

/* === FAQ === */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1rem;
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-question::after {
  content: '-';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-gray);
  font-size: 0.92rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* === 联系我们 === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.contact-info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 32px;
}

.contact-info-card h3 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--accent);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  color: var(--text-gray);
  font-size: 0.92rem;
}

.contact-item .label {
  color: var(--text-white);
  font-weight: 600;
  min-width: 80px;
}

.qr-codes {
  display: flex;
  gap: 24px;
  justify-content: center;
}

.qr-item {
  text-align: center;
}

.qr-item img {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
  object-fit: cover;
}

.qr-item p {
  color: var(--text-gray);
  font-size: 0.85rem;
}

/* === 页脚 === */
.site-footer {
  background: #0A0A14;
  border-top: 1px solid var(--border-color);
  padding: 48px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .brand-text {
  font-size: 1.3rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  display: inline-block;
}

.footer-brand p {
  color: var(--text-gray);
  font-size: 0.88rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-white);
}

.footer-col a {
  display: block;
  color: var(--text-gray);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.social-links {
  display: flex;
  gap: 12px;
}

.social-links a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-gray);
  font-size: 0.85rem;
  transition: var(--transition);
}

.social-links a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

/* === 面包屑导航 === */
.breadcrumb {
  padding: 100px 0 20px;
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.breadcrumb-inner a {
  color: var(--text-gray);
}

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

.breadcrumb-inner .sep {
  color: var(--text-muted);
}

/* === 内页通用 === */
.page-hero {
  padding: 100px 0 40px;
  text-align: center;
  background: var(--gradient-dark);
  position: relative;
}

.page-hero h1 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.page-hero p {
  color: var(--text-gray);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}

/* === How-To指南 === */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.howto-step {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  position: relative;
  transition: var(--transition);
  counter-increment: step;
}

.howto-step:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.howto-step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--gradient-primary);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 auto 16px;
}

.howto-step h4 {
  font-size: 1rem;
  margin-bottom: 8px;
}

.howto-step p {
  color: var(--text-gray);
  font-size: 0.85rem;
  line-height: 1.5;
}

/* === 分享按钮 === */
.share-btns {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 0.88rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
  color: var(--text-gray);
  background: var(--bg-card);
  cursor: pointer;
  transition: var(--transition);
}

.share-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* === 标签 === */
.tag {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(232,67,42,0.12);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.78rem;
  font-weight: 500;
  margin: 2px;
}

/* === 数据统计条 === */
.stats-bar {
  display: flex;
  justify-content: center;
  gap: 48px;
  padding: 32px 0;
  flex-wrap: wrap;
}

.stat-item {
  text-align: center;
}

.stat-item .num {
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-item .label {
  color: var(--text-gray);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* === 懒加载占位 === */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.4s ease;
}

img[loading="lazy"].loaded,
img.loaded {
  opacity: 1;
}

/* === 响应式 === */
@media (max-width: 1024px) {
  .video-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .expert-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
  .howto-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(15,15,26,0.98);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-120%);
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
  }
  .main-nav.active {
    transform: translateY(0);
  }
  .main-nav a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }
  .menu-toggle {
    display: flex;
  }
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .expert-grid {
    grid-template-columns: 1fr;
  }
  .review-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .hero-content h1 {
    font-size: 1.8rem;
  }
  .section-title h2 {
    font-size: 1.5rem;
  }
  .stats-bar {
    gap: 24px;
  }
  .stat-item .num {
    font-size: 1.6rem;
  }
  .howto-steps {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
  .hero-content h1 {
    font-size: 1.5rem;
  }
  .qr-codes {
    flex-direction: column;
    align-items: center;
  }
}

/* === HTML5 视频预览 === */
.video-preview {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: 1;
  pointer-events: none;
}

.video-card:hover .video-preview {
  opacity: 1;
}

.video-card:hover .play-btn {
  z-index: 2;
}

/* === EEAT 资质标签 === */
.credential {
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.5;
  margin-bottom: 12px;
  padding: 8px 12px;
  background: rgba(232,67,42,0.08);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary);
}

/* === 发布信息（EEAT时效性） === */
.hero-publish-info {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 20px;
  padding: 8px 16px;
  background: rgba(255,255,255,0.05);
  border-radius: 20px;
  display: inline-block;
}

/* === 面包屑增强 === */
.breadcrumb {
  padding: 80px 0 10px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.88rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.breadcrumb-list a {
  color: var(--text-gray);
}

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

.breadcrumb-list .sep {
  color: var(--text-muted);
}

/* === 内页完整页脚修复 === */
.inner-footer .footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

/* === 懒加载noscript回退 === */
noscript img {
  opacity: 1 !important;
}

/* 确保无JS时图片可见 */
.no-js img[loading="lazy"] {
  opacity: 1;
}