/* ============================================================
   足球直播 - geoff.com 主样式表
   原创设计 © 2026 足球直播
   ============================================================ */

/* CSS Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #0a1940;
  --secondary: #00c864;
  --accent: #e8ff00;
  --dark: #060f28;
  --mid: #0f2a5c;
  --light-bg: #f4f7fb;
  --text: #1a2340;
  --text-light: #5a6a8a;
  --white: #ffffff;
  --card-bg: #ffffff;
  --border: #dde4f0;
  --red: #e53935;
  --gradient: linear-gradient(135deg, #0a1940 0%, #0f2a5c 50%, #1a4080 100%);
  --gradient-green: linear-gradient(135deg, #00c864 0%, #00a050 100%);
  --shadow: 0 4px 20px rgba(10,25,64,0.12);
  --shadow-hover: 0 8px 32px rgba(10,25,64,0.22);
  --radius: 12px;
  --radius-sm: 6px;
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: var(--light-bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 20px; }
.section { padding: 60px 0; }
.section-alt { background: var(--white); }

/* ============================================================
   HEADER & NAVIGATION
   ============================================================ */
#header {
  background: var(--gradient);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1280px;
  margin: 0 auto;
}

.logo-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: var(--secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(0,200,100,0.5);
}

.logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-text .brand-name {
  font-size: 22px;
  font-weight: 900;
  color: var(--white);
  letter-spacing: 1px;
  line-height: 1.1;
}

.logo-text .brand-sub {
  font-size: 11px;
  color: var(--secondary);
  letter-spacing: 2px;
  text-transform: uppercase;
}

/* Nav */
.main-nav {
  background: rgba(6,15,40,0.95);
  border-top: 1px solid rgba(0,200,100,0.2);
}

.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.nav-list li a {
  display: block;
  padding: 13px 16px;
  color: rgba(255,255,255,0.85);
  font-size: 14px;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.nav-list li a:hover,
.nav-list li a.active {
  color: var(--secondary);
}

.nav-list li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--secondary);
  transition: width 0.3s ease;
}

.nav-list li a:hover::after,
.nav-list li a.active::after { width: 80%; }

.live-badge {
  background: var(--red);
  color: white;
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 3px;
  margin-left: 4px;
  vertical-align: middle;
  animation: pulse 1.5s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.nav-mobile-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
  padding: 8px;
}

/* Search Bar */
.search-bar-wrap {
  background: rgba(6,15,40,0.9);
  border-bottom: 1px solid rgba(0,200,100,0.15);
  padding: 10px 20px;
}

.search-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-form {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(0,200,100,0.3);
  border-radius: 24px;
  overflow: hidden;
  flex: 1;
  max-width: 600px;
}

.search-form input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  padding: 8px 16px;
  color: white;
  font-size: 14px;
}

.search-form input::placeholder { color: rgba(255,255,255,0.5); }

.search-form button {
  background: var(--secondary);
  border: none;
  padding: 8px 20px;
  color: white;
  cursor: pointer;
  font-size: 14px;
  transition: var(--transition);
}

.search-form button:hover { background: #00a050; }

.search-hot-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.search-hot-tags span { color: rgba(255,255,255,0.5); font-size: 12px; }

.hot-tag {
  background: rgba(0,200,100,0.15);
  color: var(--secondary);
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.hot-tag:hover { background: var(--secondary); color: white; }

/* ============================================================
   HERO BANNER
   ============================================================ */
.hero {
  position: relative;
  min-height: 520px;
  background: var(--gradient);
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 60px 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-text h1 {
  font-size: 42px;
  font-weight: 900;
  color: white;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero-text h1 span { color: var(--secondary); }

.hero-text .hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 28px;
  line-height: 1.8;
}

.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }

.btn-primary {
  background: var(--secondary);
  color: white;
  padding: 13px 28px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(0,200,100,0.4);
}

.btn-primary:hover {
  background: #00a050;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0,200,100,0.5);
}

.btn-outline {
  background: transparent;
  color: white;
  padding: 12px 28px;
  border-radius: 28px;
  font-size: 15px;
  font-weight: 600;
  border: 2px solid rgba(255,255,255,0.5);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

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

.hero-stats {
  display: flex;
  gap: 24px;
  margin-top: 32px;
}

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

.hero-stat .num {
  font-size: 28px;
  font-weight: 900;
  color: var(--secondary);
  display: block;
}

.hero-stat .label {
  font-size: 12px;
  color: rgba(255,255,255,0.7);
}

.hero-live-card {
  background: rgba(6,15,40,0.85);
  border: 1px solid rgba(0,200,100,0.3);
  border-radius: var(--radius);
  padding: 24px;
  backdrop-filter: blur(10px);
}

.live-card-title {
  display: flex;
  align-items: center;
  gap: 8px;
  color: white;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.live-dot {
  width: 10px;
  height: 10px;
  background: var(--red);
  border-radius: 50%;
  animation: pulse 1s infinite;
}

.live-matches {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.live-match-item {
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  transition: var(--transition);
}

.live-match-item:hover { background: rgba(0,200,100,0.1); }

.match-teams {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: white;
  font-weight: 600;
}

.match-score {
  background: var(--secondary);
  color: white;
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 900;
}

.match-time {
  font-size: 12px;
  color: var(--red);
  font-weight: 600;
}

/* ============================================================
   SECTION HEADERS
   ============================================================ */
.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-tag {
  display: inline-block;
  background: rgba(0,200,100,0.1);
  color: var(--secondary);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 10px;
  border: 1px solid rgba(0,200,100,0.3);
}

.section-header h2 {
  font-size: 32px;
  font-weight: 900;
  color: var(--primary);
  margin-bottom: 12px;
  line-height: 1.3;
}

.section-header h2 span { color: var(--secondary); }

.section-header p {
  font-size: 15px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.section-divider {
  width: 60px;
  height: 4px;
  background: var(--gradient-green);
  border-radius: 2px;
  margin: 16px auto 0;
}

/* ============================================================
   VIDEO CARDS
   ============================================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.video-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.video-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  cursor: pointer;
}

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

.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--dark);
}

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

.video-card:hover .video-thumb img { transform: scale(1.08); }

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 52px;
  height: 52px;
  background: rgba(0,200,100,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(0,200,100,0.5);
}

.video-play-btn svg {
  width: 22px;
  height: 22px;
  fill: white;
  margin-left: 3px;
}

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

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: white;
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
}

.video-live-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--red);
  color: white;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 700;
  animation: pulse 1.5s infinite;
}

.video-info {
  padding: 14px;
}

.video-info h3 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-light);
}

.video-views { display: flex; align-items: center; gap: 4px; }
.video-likes { display: flex; align-items: center; gap: 4px; color: var(--red); }
.video-comments { display: flex; align-items: center; gap: 4px; color: var(--secondary); }

.video-category {
  display: inline-block;
  background: rgba(0,200,100,0.1);
  color: var(--secondary);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  margin-bottom: 6px;
}

/* Featured Video */
.featured-video-wrap {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}

.featured-video-main {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 16/9;
  background: var(--dark);
  cursor: pointer;
}

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

.featured-video-main:hover img { transform: scale(1.04); }

.featured-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 72px;
  height: 72px;
  background: rgba(0,200,100,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 30px rgba(0,200,100,0.6);
  transition: var(--transition);
}

.featured-play-btn svg {
  width: 32px;
  height: 32px;
  fill: white;
  margin-left: 4px;
}

.featured-video-main:hover .featured-play-btn {
  transform: translate(-50%, -50%) scale(1.1);
}

.featured-video-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(transparent, rgba(0,0,0,0.85));
}

.featured-video-info h3 {
  color: white;
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 6px;
}

.featured-video-info .meta {
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  display: flex;
  gap: 16px;
}

.video-list-side {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.video-list-item {
  display: flex;
  gap: 10px;
  cursor: pointer;
  transition: var(--transition);
  padding: 8px;
  border-radius: var(--radius-sm);
}

.video-list-item:hover { background: rgba(0,200,100,0.05); }

.video-list-thumb {
  width: 110px;
  height: 62px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  position: relative;
  background: var(--dark);
}

.video-list-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-list-thumb .play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 28px;
  height: 28px;
  background: rgba(0,200,100,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
}

.video-list-thumb .play-icon svg { width: 12px; height: 12px; fill: white; margin-left: 2px; }

.video-list-item:hover .play-icon { opacity: 1; }

.video-list-info h4 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-list-info .meta {
  font-size: 11px;
  color: var(--text-light);
}

/* ============================================================
   SCORE TICKER
   ============================================================ */
.score-ticker {
  background: var(--dark);
  padding: 10px 0;
  overflow: hidden;
  border-bottom: 2px solid var(--secondary);
}

.ticker-inner {
  display: flex;
  align-items: center;
  gap: 0;
}

.ticker-label {
  background: var(--secondary);
  color: white;
  padding: 4px 16px;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  flex-shrink: 0;
}

.ticker-scroll {
  overflow: hidden;
  flex: 1;
}

.ticker-track {
  display: flex;
  gap: 40px;
  animation: ticker 30s linear infinite;
  white-space: nowrap;
}

.ticker-track:hover { animation-play-state: paused; }

@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.ticker-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.9);
  font-size: 13px;
  white-space: nowrap;
}

.ticker-score {
  background: var(--secondary);
  color: white;
  padding: 1px 8px;
  border-radius: 3px;
  font-weight: 700;
  font-size: 13px;
}

.ticker-live {
  color: var(--red);
  font-size: 11px;
  font-weight: 700;
}

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

.expert-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

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

.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 14px;
  overflow: hidden;
  border: 3px solid var(--secondary);
  background: var(--light-bg);
}

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

.expert-name {
  font-size: 16px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 4px;
}

.expert-title {
  font-size: 12px;
  color: var(--secondary);
  margin-bottom: 10px;
  font-weight: 600;
}

.expert-desc {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
  margin-bottom: 14px;
}

.expert-awards {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  margin-bottom: 14px;
}

.award-tag {
  background: rgba(0,200,100,0.1);
  color: var(--secondary);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
  border: 1px solid rgba(0,200,100,0.2);
}

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

.btn-sm {
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  transition: var(--transition);
}

.btn-green {
  background: var(--secondary);
  color: white;
}

.btn-green:hover { background: #00a050; }

.btn-border {
  border: 1px solid var(--secondary);
  color: var(--secondary);
}

.btn-border:hover { background: var(--secondary); color: white; }

/* ============================================================
   FAQ SECTION
   ============================================================ */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item.active { border-color: var(--secondary); }

.faq-question {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
}

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

.faq-item.active .faq-question { color: var(--secondary); }

.faq-icon {
  width: 24px;
  height: 24px;
  background: rgba(0,200,100,0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--secondary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item.active .faq-icon { transform: rotate(45deg); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 20px;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 20px 18px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}

/* ============================================================
   REVIEWS
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.review-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.review-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.review-user-info .name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}

.review-user-info .date {
  font-size: 12px;
  color: var(--text-light);
}

.review-stars {
  color: #f5a623;
  font-size: 14px;
  margin-bottom: 8px;
}

.review-text {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
}

.review-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 10px;
}

.review-tag {
  background: var(--light-bg);
  color: var(--text-light);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 10px;
}

/* ============================================================
   COMMUNITY SECTION
   ============================================================ */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.community-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
}

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

.community-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 16px;
}

.community-card h3 {
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}

.community-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.community-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 16px;
}

.c-stat .num {
  font-size: 20px;
  font-weight: 900;
  color: var(--secondary);
  display: block;
}

.c-stat .label {
  font-size: 11px;
  color: var(--text-light);
}

/* ============================================================
   PARTNER LOGOS
   ============================================================ */
.partners-row {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  padding: 20px 0;
}

.partner-logo {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-light);
  transition: var(--transition);
  min-width: 120px;
  text-align: center;
}

.partner-logo:hover {
  border-color: var(--secondary);
  color: var(--secondary);
  transform: translateY(-2px);
}

/* ============================================================
   CONTACT SECTION
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.contact-info h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: rgba(0,200,100,0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  border: 1px solid rgba(0,200,100,0.2);
}

.contact-item .label {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 2px;
}

.contact-item .value {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
}

.qr-codes {
  display: flex;
  gap: 24px;
  margin-top: 24px;
}

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

.qr-box {
  width: 100px;
  height: 100px;
  background: var(--light-bg);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  margin-bottom: 6px;
}

.qr-item p {
  font-size: 12px;
  color: var(--text-light);
}

/* ============================================================
   SOCIAL SHARE
   ============================================================ */
.social-share {
  background: var(--gradient);
  padding: 40px 0;
}

.social-share-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 20px;
}

.social-share h3 {
  color: white;
  font-size: 20px;
  font-weight: 700;
}

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

.social-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  color: white;
  transition: var(--transition);
  cursor: pointer;
}

.social-btn:hover { transform: translateY(-2px); opacity: 0.9; }

.social-btn.wechat { background: #07c160; }
.social-btn.weibo { background: #e6162d; }
.social-btn.douyin { background: #000000; border: 1px solid #fe2c55; }
.social-btn.bilibili { background: #00a1d6; }

/* ============================================================
   FOOTER
   ============================================================ */
#footer {
  background: var(--dark);
  color: rgba(255,255,255,0.75);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.footer-brand .brand-name {
  font-size: 22px;
  font-weight: 900;
  color: white;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.8;
  margin-bottom: 16px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: white;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(0,200,100,0.3);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 13px;
  color: rgba(255,255,255,0.65);
  transition: var(--transition);
}

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

.footer-bottom {
  background: rgba(0,0,0,0.3);
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 16px 20px;
  max-width: 100%;
}

.footer-bottom-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 12px;
}

.footer-bottom-links {
  display: flex;
  gap: 16px;
}

.footer-bottom-links a {
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}

.footer-bottom-links a:hover { color: var(--secondary); }

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb {
  background: var(--white);
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

.breadcrumb-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-light);
}

.breadcrumb-inner a { color: var(--secondary); }
.breadcrumb-inner a:hover { text-decoration: underline; }
.breadcrumb-sep { color: var(--border); }

/* ============================================================
   INNER PAGE CONTENT
   ============================================================ */
.page-hero {
  background: var(--gradient);
  padding: 50px 0;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/hero_banner.jpg') center/cover;
  opacity: 0.2;
}

.page-hero-content {
  position: relative;
  z-index: 1;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-hero h1 {
  font-size: 36px;
  font-weight: 900;
  color: white;
  margin-bottom: 10px;
}

.page-hero p {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  max-width: 600px;
}

.page-content {
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 20px;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
}

.page-main { min-width: 0; }

.page-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-widget {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.sidebar-widget h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--secondary);
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-links a {
  font-size: 13px;
  color: var(--text-light);
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 6px;
}

.sidebar-links a:hover { color: var(--secondary); padding-left: 4px; }

.article-body {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.article-body h2 {
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  margin: 24px 0 12px;
}

.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin: 20px 0 10px;
}

.article-body p {
  font-size: 15px;
  color: var(--text);
  line-height: 1.9;
  margin-bottom: 16px;
}

.article-body img {
  width: 100%;
  border-radius: var(--radius);
  margin: 20px 0;
}

/* ============================================================
   AI SECTION
   ============================================================ */
.ai-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-card {
  background: var(--gradient);
  border-radius: var(--radius);
  padding: 28px;
  color: white;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.ai-card:hover { transform: translateY(-4px); }

.ai-card::before {
  content: '';
  position: absolute;
  top: -30px;
  right: -30px;
  width: 100px;
  height: 100px;
  background: rgba(0,200,100,0.15);
  border-radius: 50%;
}

.ai-card-icon {
  font-size: 36px;
  margin-bottom: 14px;
}

.ai-card h3 {
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 10px;
}

.ai-card p {
  font-size: 13px;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
}

/* ============================================================
   HOW TO JOIN
   ============================================================ */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 32px;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(to right, var(--secondary), rgba(0,200,100,0.2));
  z-index: 0;
}

.step-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  position: relative;
  z-index: 1;
  transition: var(--transition);
}

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

.step-num {
  width: 52px;
  height: 52px;
  background: var(--gradient-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  color: white;
  margin: 0 auto 14px;
  box-shadow: 0 4px 16px rgba(0,200,100,0.3);
}

.step-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.step-card p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .featured-video-wrap { grid-template-columns: 1fr; }
  .video-list-side { display: none; }
}

@media (max-width: 768px) {
  .hero-content { grid-template-columns: 1fr; }
  .hero-live-card { display: none; }
  .hero-text h1 { font-size: 28px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .video-grid-3 { grid-template-columns: repeat(2, 1fr); }
  .community-grid { grid-template-columns: 1fr; }
  .ai-features-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .contact-grid { grid-template-columns: 1fr; }
  .page-content { grid-template-columns: 1fr; }
  .page-sidebar { display: none; }
  .nav-list { display: none; }
  .nav-mobile-btn { display: block; }
  .nav-list.open { display: flex; flex-direction: column; position: absolute; top: 100%; left: 0; right: 0; background: var(--dark); z-index: 100; }
  .section-header h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .social-share-inner { flex-direction: column; text-align: center; }
  .search-hot-tags { display: none; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .video-grid-3 { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
}

/* ============================================================
   UTILITY CLASSES
   ============================================================ */
.text-center { text-align: center; }
.text-green { color: var(--secondary); }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.view-more-wrap { text-align: center; margin-top: 32px; }
.btn-view-more {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border: 2px solid var(--secondary);
  color: var(--secondary);
  border-radius: 28px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-view-more:hover { background: var(--secondary); color: white; }

/* Image gallery */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.gallery-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 1;
  cursor: pointer;
  transition: var(--transition);
}

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

.gallery-item:hover img { transform: scale(1.08); }

/* Video modal */
.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.9);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}

.video-modal.open { display: flex; }

.video-modal-inner {
  position: relative;
  width: 90%;
  max-width: 900px;
  aspect-ratio: 16/9;
  background: black;
  border-radius: var(--radius);
  overflow: hidden;
}

.video-modal-close {
  position: absolute;
  top: -40px;
  right: 0;
  color: white;
  font-size: 28px;
  cursor: pointer;
  background: none;
  border: none;
}

.video-placeholder {
  width: 100%;
  height: 100%;
  background: var(--dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: white;
  gap: 16px;
}

.video-placeholder .big-play {
  width: 80px;
  height: 80px;
  background: var(--secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.video-placeholder .big-play svg { width: 36px; height: 36px; fill: white; margin-left: 5px; }

/* Video Modal - active state (JS controlled) */
.video-modal.active { display: flex; }

/* Back to top button */
#backToTop {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  background: var(--secondary);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 999;
  box-shadow: 0 4px 16px rgba(0,200,100,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
}

#backToTop:hover { transform: translateY(-3px); }

/* FAQ open state (JS controlled) */
.faq-item.open { border-color: var(--secondary); }
.faq-item.open .faq-question { color: var(--secondary); }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-item.open .faq-answer { max-height: 400px; padding: 0 20px 18px; }

/* Mobile nav open state */
@media (max-width: 768px) {
  .nav-list.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--dark);
    z-index: 100;
    padding: 10px 0;
    border-top: 1px solid rgba(0,200,100,0.2);
  }
  .nav-list.open li a { padding: 12px 20px; border-bottom: 1px solid rgba(255,255,255,0.05); }
}