/* ============================================
   小马拉大车 - 原创样式表
   品牌色：#E8436F(品牌粉) #FF7E5F(暖橙) #1A1A2E(深夜蓝黑)
   ============================================ */

/* === CSS Variables === */
:root {
  --primary: #E8436F;
  --primary-light: #FF6B8A;
  --secondary: #FF7E5F;
  --dark: #1A1A2E;
  --dark-light: #2D2D44;
  --light: #F8F0F5;
  --light-gray: #F5F5F7;
  --accent: #FFD700;
  --text: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --white: #FFFFFF;
  --border: #E8E8E8;
  --shadow: rgba(232, 67, 111, 0.15);
  --shadow-dark: rgba(0,0,0,0.1);
  --gradient: linear-gradient(135deg, #E8436F 0%, #FF7E5F 100%);
  --gradient-dark: linear-gradient(135deg, #1A1A2E 0%, #2D2D44 100%);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: all 0.3s ease;
  --max-width: 1200px;
}

/* === Reset & Base === */
*, *::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", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background-color: var(--white);
  line-height: 1.8;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.4;
  color: var(--dark);
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2rem;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
  margin-bottom: 12px;
}

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

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--gradient);
  color: var(--white);
  box-shadow: 0 4px 15px var(--shadow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow);
  color: var(--white);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

/* === Header & Navigation === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px var(--shadow-dark);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

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

.site-logo img {
  height: 42px;
  width: auto;
}

.site-logo span {
  font-size: 1.3rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

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

.main-nav a:hover,
.main-nav a.active {
  color: var(--primary);
  background: rgba(232, 67, 111, 0.08);
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.mobile-toggle span {
  width: 25px;
  height: 3px;
  background: var(--dark);
  border-radius: 3px;
  transition: var(--transition);
}

/* === Search Bar === */
.search-bar-wrapper {
  background: var(--light);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  margin-top: 70px;
}

.search-bar {
  display: flex;
  align-items: center;
  max-width: 680px;
  margin: 0 auto;
  background: var(--white);
  border-radius: 50px;
  overflow: hidden;
  box-shadow: 0 2px 10px var(--shadow-dark);
  border: 2px solid transparent;
  transition: var(--transition);
}

.search-bar:focus-within {
  border-color: var(--primary);
}

.search-bar input {
  flex: 1;
  border: none;
  padding: 12px 24px;
  font-size: 0.95rem;
  outline: none;
  background: transparent;
  color: var(--text);
}

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

.search-bar button {
  background: var(--gradient);
  border: none;
  color: var(--white);
  padding: 12px 28px;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  transition: var(--transition);
}

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

/* === Hero Banner === */
.hero-banner {
  position: relative;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.85) 0%, rgba(232,67,111,0.6) 50%, rgba(255,126,95,0.5) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--white);
  max-width: 800px;
  padding: 40px 20px;
}

.hero-content h1 {
  font-size: 3rem;
  color: var(--white);
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.hero-content h1 .brand-highlight {
  color: var(--accent);
}

.hero-content p {
  font-size: 1.2rem;
  line-height: 1.8;
  margin-bottom: 30px;
  opacity: 0.95;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 30px;
}

.hero-tags span {
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(5px);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.9rem;
  border: 1px solid rgba(255,255,255,0.3);
}

.hero-btns {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-btns .btn-primary {
  background: var(--white);
  color: var(--primary);
}

.hero-btns .btn-primary:hover {
  background: var(--accent);
  color: var(--dark);
}

.hero-btns .btn-outline {
  border-color: var(--white);
  color: var(--white);
}

.hero-btns .btn-outline:hover {
  background: var(--white);
  color: var(--primary);
}

/* === Video Cards Grid === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 25px;
}

.video-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow-dark);
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px var(--shadow);
}

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

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 64px;
  height: 64px;
  background: rgba(232, 67, 111, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.video-play-btn::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent white;
  margin-left: 4px;
}

.video-card:hover .video-play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.75);
  color: var(--white);
  padding: 3px 8px;
  border-radius: 4px;
  font-size: 0.8rem;
}

.video-info {
  padding: 18px;
}

.video-info h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 15px;
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.video-tags {
  display: flex;
  gap: 6px;
  margin-top: 10px;
  flex-wrap: wrap;
}

.video-tags span {
  background: var(--light);
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.78rem;
}

/* === Star Cards === */
.star-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 25px;
}

.star-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 20px var(--shadow-dark);
  transition: var(--transition);
  text-align: center;
}

.star-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px var(--shadow);
}

.star-card .star-img {
  aspect-ratio: 3/4;
  overflow: hidden;
}

.star-card .star-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.star-card .star-info {
  padding: 18px;
}

.star-card .star-info h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.star-card .star-info p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* === Feature Grid === */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 25px;
}

.feature-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 35px 25px;
  text-align: center;
  box-shadow: 0 4px 20px var(--shadow-dark);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px var(--shadow);
  border-color: var(--primary);
}

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--white);
}

.feature-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-light);
  font-size: 0.92rem;
}

/* === Expert Section === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 25px;
}

.expert-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: 0 4px 20px var(--shadow-dark);
  transition: var(--transition);
}

.expert-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px var(--shadow);
}

.expert-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto 15px;
  border: 3px solid var(--primary);
}

.expert-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.expert-card h3 {
  font-size: 1.1rem;
  margin-bottom: 5px;
}

.expert-card .expert-title {
  color: var(--primary);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 10px;
}

.expert-card p {
  color: var(--text-light);
  font-size: 0.88rem;
  margin-bottom: 15px;
}

.expert-card .expert-btns {
  display: flex;
  gap: 10px;
  justify-content: center;
}

.expert-card .expert-btns a {
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-weight: 600;
}

/* === Brand Wall === */
.brand-wall {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 40px;
  padding: 30px 0;
}

.brand-wall-item {
  background: var(--light-gray);
  padding: 20px 35px;
  border-radius: var(--radius-sm);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-light);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.brand-wall-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 4px 15px var(--shadow);
}

/* === Reviews === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
}

.review-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: 0 4px 20px var(--shadow-dark);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.review-card:hover {
  box-shadow: 0 8px 30px var(--shadow);
}

.review-stars {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 10px;
}

.review-card blockquote {
  color: var(--text-light);
  font-size: 0.95rem;
  font-style: italic;
  margin-bottom: 15px;
  line-height: 1.7;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 10px;
}

.review-author-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 0.9rem;
}

.review-author-info strong {
  display: block;
  font-size: 0.9rem;
}

.review-author-info span {
  color: var(--text-muted);
  font-size: 0.8rem;
}

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

.faq-item {
  background: var(--white);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  box-shadow: 0 2px 10px var(--shadow-dark);
  overflow: hidden;
  border: 1px solid var(--border);
}

.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
}

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

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--primary);
  transition: var(--transition);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-answer-inner {
  padding: 0 24px 18px;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* === Contact Section === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
}

.contact-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 30px;
  box-shadow: 0 4px 20px var(--shadow-dark);
  text-align: center;
}

.contact-card h3 {
  font-size: 1.1rem;
  margin-bottom: 15px;
  color: var(--primary);
}

.contact-card p {
  color: var(--text-light);
  font-size: 0.92rem;
  margin-bottom: 8px;
}

/* === Footer === */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 1.1rem;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--gradient);
  border-radius: 3px;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.8;
  margin-bottom: 8px;
}

.footer-col a {
  color: rgba(255,255,255,0.7);
  display: block;
  padding: 4px 0;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-col a:hover {
  color: var(--primary-light);
  padding-left: 5px;
}

.footer-col .footer-logo img {
  height: 40px;
  margin-bottom: 15px;
}

.footer-qr {
  display: flex;
  gap: 15px;
  margin-top: 15px;
}

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

.footer-qr-item img {
  width: 100px;
  height: 100px;
  border-radius: var(--radius-sm);
  border: 2px solid rgba(255,255,255,0.2);
}

.footer-qr-item span {
  display: block;
  font-size: 0.78rem;
  margin-top: 5px;
  color: rgba(255,255,255,0.6);
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 15px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--white);
  transition: var(--transition);
  padding: 0;
}

.footer-social a:hover {
  background: var(--primary);
  padding-left: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.footer-bottom a {
  color: var(--primary-light);
}

/* === Share Buttons === */
.share-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 20px;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--white);
  transition: var(--transition);
}

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

.share-btn.wechat { background: #07C160; }
.share-btn.weibo { background: #E6162D; }
.share-btn.douyin { background: #161823; }
.share-btn.bilibili { background: #00A1D6; }

/* === Breadcrumb === */
.breadcrumb {
  padding: 15px 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

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

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

.breadcrumb span {
  margin: 0 8px;
}

/* === Page Banner === */
.page-banner {
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 100px 0 60px;
  text-align: center;
  color: var(--white);
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(26,26,46,0.88) 0%, rgba(232,67,111,0.65) 100%);
}

.page-banner .container {
  position: relative;
  z-index: 2;
}

.page-banner h1 {
  font-size: 2.2rem;
  color: var(--white);
  margin-bottom: 10px;
}

.page-banner p {
  font-size: 1.05rem;
  opacity: 0.9;
}

/* === Content Sections === */
.content-block {
  margin-bottom: 40px;
}

.content-block h2 {
  font-size: 1.6rem;
  margin-bottom: 15px;
  color: var(--dark);
}

.content-block h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.content-block p {
  margin-bottom: 15px;
  line-height: 1.9;
}

/* === How-To Guide === */
.howto-steps {
  counter-reset: step;
}

.howto-step {
  display: flex;
  gap: 20px;
  margin-bottom: 25px;
  padding: 25px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: 0 2px 15px var(--shadow-dark);
  align-items: flex-start;
}

.howto-step::before {
  counter-increment: step;
  content: counter(step);
  min-width: 45px;
  height: 45px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
}

.howto-step h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}

.howto-step p {
  color: var(--text-light);
  font-size: 0.92rem;
}

/* === Lazy Load === */
img[data-src] {
  opacity: 0;
  transition: opacity 0.5s ease;
}

img[data-src].loaded {
  opacity: 1;
}

/* === Scroll to Top === */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 45px;
  height: 45px;
  background: var(--gradient);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 15px var(--shadow);
  border: none;
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  transform: translateY(-3px);
}

/* === Alternating Background === */
.bg-light {
  background: var(--light);
}

.bg-dark {
  background: var(--dark);
  color: var(--white);
}

.bg-dark h2, .bg-dark h3 {
  color: var(--white);
}

.bg-dark .section-title h2 {
  -webkit-text-fill-color: var(--white);
}

/* === Community Features === */
.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

.community-card {
  background: var(--gradient-dark);
  border-radius: var(--radius);
  padding: 30px 20px;
  text-align: center;
  color: var(--white);
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.1);
}

.community-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
}

.community-card .comm-icon {
  font-size: 2.2rem;
  margin-bottom: 15px;
}

.community-card h3 {
  font-size: 1.05rem;
  color: var(--white);
  margin-bottom: 8px;
}

.community-card p {
  font-size: 0.88rem;
  color: rgba(255,255,255,0.7);
}

/* === AI Section === */
.ai-showcase {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 30px;
}

.ai-showcase img {
  width: 100%;
  height: 350px;
  object-fit: cover;
}

.ai-showcase-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px;
  background: linear-gradient(transparent, rgba(26,26,46,0.9));
  color: var(--white);
}

/* === Responsive === */
@media (max-width: 992px) {
  .main-nav {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 10px 30px var(--shadow-dark);
    transform: translateY(-120%);
    transition: transform 0.3s ease;
    gap: 5px;
  }

  .main-nav.active {
    transform: translateY(0);
  }

  .main-nav a {
    padding: 12px 16px;
    width: 100%;
    text-align: center;
  }

  .mobile-toggle {
    display: flex;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .section {
    padding: 50px 0;
  }

  .section-title h2 {
    font-size: 1.6rem;
  }

  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

@media (max-width: 768px) {
  .hero-banner {
    min-height: 450px;
  }

  .hero-content h1 {
    font-size: 1.7rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-col h4::after {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-qr {
    justify-content: center;
  }

  .footer-social {
    justify-content: center;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }

  .star-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .review-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .star-grid {
    grid-template-columns: 1fr;
  }

  .hero-btns {
    flex-direction: column;
    align-items: center;
  }

  .container {
    padding: 0 15px;
  }
}

/* === Animation === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* === MCP Embed === */
.mcp-embed {
  background: var(--dark-light);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 20px;
  border: 1px solid rgba(255,255,255,0.1);
}

.mcp-embed pre {
  color: rgba(255,255,255,0.7);
  font-size: 0.82rem;
  overflow-x: auto;
  white-space: pre-wrap;
}


/* 更新时间样式 */
.update-time {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 20px;
  padding: 8px 16px;
  background: rgba(232,67,111,0.06);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  display: inline-block;
}

/* star-card链接样式修复 */
a.star-card {
  color: inherit;
  text-decoration: none;
}
a.star-card:hover {
  color: inherit;
}