/* =============================================
   91网 - 主样式文件
   潮流街头时尚风格 | 高饱和度撞色主色调
   ============================================= */

:root {
  --electric-blue: #00b4ff;
  --neon-pink: #ff2d78;
  --bright-orange: #ff8c00;
  --acid-green: #39ff14;
  --pure-black: #0a0a0a;
  --pure-white: #ffffff;
  --dark-bg: #111118;
  --card-bg: #1a1a28;
  --text-muted: #aaaacc;
  --gradient-main: linear-gradient(135deg, #00b4ff 0%, #ff2d78 50%, #ff8c00 100%);
  --gradient-dark: linear-gradient(180deg, #0a0a0a 0%, #111118 100%);
  --glow-blue: 0 0 20px rgba(0,180,255,0.6), 0 0 40px rgba(0,180,255,0.3);
  --glow-pink: 0 0 20px rgba(255,45,120,0.6), 0 0 40px rgba(255,45,120,0.3);
  --glow-orange: 0 0 20px rgba(255,140,0,0.6), 0 0 40px rgba(255,140,0,0.3);
  --glow-green: 0 0 20px rgba(57,255,20,0.6), 0 0 40px rgba(57,255,20,0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--dark-bg);
  color: var(--pure-white);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: var(--electric-blue);
  text-decoration: none;
  transition: color 0.3s ease;
}

a:hover {
  color: var(--neon-pink);
}

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

/* =============================================
   粒子背景动画
   ============================================= */
.particles-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  animation: floatParticle linear infinite;
  opacity: 0.4;
}

@keyframes floatParticle {
  0% { transform: translateY(100vh) rotate(0deg); opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { transform: translateY(-100px) rotate(720deg); opacity: 0; }
}

/* =============================================
   顶部导航
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,10,10,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,180,255,0.2);
  padding: 0 20px;
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -1px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

.site-logo span.logo-num {
  font-size: 2rem;
  font-weight: 900;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.main-nav li a {
  display: block;
  padding: 8px 14px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #ccccee;
  border-radius: 6px;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.main-nav li a:hover,
.main-nav li a.active {
  color: var(--pure-white);
  background: rgba(0,180,255,0.15);
  text-shadow: var(--glow-blue);
}

.nav-cta {
  background: var(--gradient-main) !important;
  color: var(--pure-white) !important;
  border-radius: 20px !important;
  padding: 8px 20px !important;
  font-weight: 700 !important;
  box-shadow: var(--glow-pink);
}

.nav-cta:hover {
  transform: scale(1.05);
  box-shadow: var(--glow-orange) !important;
}

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

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--electric-blue);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* =============================================
   搜索框
   ============================================= */
.search-bar-wrap {
  background: rgba(0,0,0,0.5);
  border-bottom: 1px solid rgba(255,45,120,0.15);
  padding: 12px 20px;
}

.search-bar-inner {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 12px 50px 12px 20px;
  background: rgba(255,255,255,0.06);
  border: 1.5px solid rgba(0,180,255,0.3);
  border-radius: 30px;
  color: var(--pure-white);
  font-size: 0.95rem;
  outline: none;
  transition: all 0.3s ease;
}

.search-input::placeholder {
  color: rgba(255,255,255,0.35);
}

.search-input:focus {
  border-color: var(--electric-blue);
  box-shadow: var(--glow-blue);
  background: rgba(0,180,255,0.08);
}

.search-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--gradient-main);
  border: none;
  border-radius: 50%;
  width: 38px;
  height: 38px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: white;
  transition: transform 0.3s ease;
}

.search-btn:hover {
  transform: translateY(-50%) scale(1.1);
}

/* =============================================
   首屏 Banner
   ============================================= */
.hero-section {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--pure-black);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner-hero.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45) saturate(1.3);
  transform: scale(1.05);
  animation: heroBgPulse 8s ease-in-out infinite alternate;
}

@keyframes heroBgPulse {
  from { transform: scale(1.05); }
  to { transform: scale(1.12); }
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(0,180,255,0.15) 0%,
    rgba(0,0,0,0.4) 40%,
    rgba(255,45,120,0.12) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 40px 20px;
  max-width: 900px;
}

.hero-badge {
  display: inline-block;
  background: rgba(0,180,255,0.15);
  border: 1px solid rgba(0,180,255,0.5);
  color: var(--electric-blue);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 20px;
  margin-bottom: 20px;
  animation: pulseBadge 2s ease-in-out infinite;
}

@keyframes pulseBadge {
  0%, 100% { box-shadow: 0 0 10px rgba(0,180,255,0.3); }
  50% { box-shadow: 0 0 25px rgba(0,180,255,0.7); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 16px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 30px rgba(0,180,255,0.5));
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: rgba(255,255,255,0.85);
  margin-bottom: 30px;
  font-weight: 400;
  text-shadow: 0 2px 10px rgba(0,0,0,0.5);
}

.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

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

.hero-stat .num {
  display: block;
  font-size: 2rem;
  font-weight: 900;
  color: var(--electric-blue);
  text-shadow: var(--glow-blue);
}

.hero-stat .label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.6);
  letter-spacing: 1px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-main);
  color: white;
  font-size: 1rem;
  font-weight: 700;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: var(--glow-pink);
  text-decoration: none;
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 0 30px rgba(255,45,120,0.8), 0 0 60px rgba(0,180,255,0.4);
  color: white;
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: transparent;
  color: var(--pure-white);
  font-size: 1rem;
  font-weight: 700;
  border-radius: 30px;
  border: 2px solid rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
}

.btn-secondary:hover {
  border-color: var(--electric-blue);
  color: var(--electric-blue);
  box-shadow: var(--glow-blue);
  transform: translateY(-3px);
}

/* =============================================
   通用区块样式
   ============================================= */
.section {
  padding: 80px 20px;
  position: relative;
  z-index: 1;
}

.section-alt {
  background: rgba(255,255,255,0.02);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
}

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

.section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--neon-pink);
  margin-bottom: 12px;
  padding: 4px 14px;
  border: 1px solid rgba(255,45,120,0.4);
  border-radius: 20px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 14px;
}

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

.section-desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* =============================================
   视频卡片
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.video-card {
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.4s ease;
  cursor: pointer;
  position: relative;
}

.video-card:hover {
  transform: translateY(-8px);
  border-color: var(--electric-blue);
  box-shadow: var(--glow-blue), 0 20px 60px rgba(0,0,0,0.5);
}

.video-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/4;
}

.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.4s ease;
}

.video-card:hover .video-thumb img {
  transform: scale(1.08);
  filter: brightness(0.7) saturate(1.5);
}

.video-play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: radial-gradient(circle, rgba(0,180,255,0.3) 0%, transparent 70%);
}

.video-card:hover .video-play-btn {
  opacity: 1;
}

.play-icon {
  width: 64px;
  height: 64px;
  background: var(--gradient-main);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: var(--glow-pink);
  animation: playPulse 1.5s ease-in-out infinite;
  transform: scale(0.8);
  transition: transform 0.3s ease;
}

.video-card:hover .play-icon {
  transform: scale(1);
}

@keyframes playPulse {
  0%, 100% { box-shadow: var(--glow-pink); }
  50% { box-shadow: 0 0 40px rgba(255,45,120,0.9), 0 0 80px rgba(0,180,255,0.5); }
}

.video-glow-overlay {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.4s ease;
  background: linear-gradient(135deg,
    rgba(0,180,255,0.25) 0%,
    rgba(255,45,120,0.2) 50%,
    rgba(255,140,0,0.15) 100%);
  mix-blend-mode: screen;
}

.video-card:hover .video-glow-overlay {
  opacity: 1;
}

.video-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--neon-pink);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
  letter-spacing: 1px;
  box-shadow: var(--glow-pink);
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
  color: var(--pure-white);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

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

.video-meta .icon {
  font-size: 0.85rem;
}

/* =============================================
   社区模块
   ============================================= */
.community-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.topic-card {
  background: var(--card-bg);
  border-radius: 14px;
  padding: 20px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s ease;
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.topic-card:hover {
  border-color: var(--neon-pink);
  box-shadow: var(--glow-pink);
  transform: translateX(4px);
}

.topic-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.topic-icon.blue { background: rgba(0,180,255,0.2); }
.topic-icon.pink { background: rgba(255,45,120,0.2); }
.topic-icon.orange { background: rgba(255,140,0,0.2); }
.topic-icon.green { background: rgba(57,255,20,0.2); }

.topic-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--pure-white);
}

.topic-content p {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.topic-tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 10px;
  border-radius: 10px;
  background: rgba(0,180,255,0.15);
  color: var(--electric-blue);
  border: 1px solid rgba(0,180,255,0.3);
}

.danmu-wrap {
  background: var(--card-bg);
  border-radius: 14px;
  padding: 20px;
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
  height: 200px;
  position: relative;
}

.danmu-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 14px;
  letter-spacing: 1px;
}

.danmu-stream {
  position: absolute;
  top: 50px;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

.danmu-item {
  position: absolute;
  white-space: nowrap;
  font-size: 0.85rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  animation: danmuFlow linear infinite;
  opacity: 0.85;
}

@keyframes danmuFlow {
  from { transform: translateX(110%); }
  to { transform: translateX(-110%); }
}

/* =============================================
   AI 模块
   ============================================= */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.ai-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 28px 24px;
  border: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.ai-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: conic-gradient(transparent, rgba(0,180,255,0.05), transparent 30%);
  animation: rotateBg 6s linear infinite;
}

@keyframes rotateBg {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.ai-card:hover {
  border-color: var(--acid-green);
  box-shadow: var(--glow-green);
  transform: translateY(-6px);
}

.ai-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  display: block;
  filter: drop-shadow(0 0 10px rgba(57,255,20,0.5));
}

.ai-card h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: var(--pure-white);
}

.ai-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.ai-btn {
  display: inline-block;
  margin-top: 16px;
  padding: 8px 20px;
  background: rgba(57,255,20,0.1);
  color: var(--acid-green);
  border: 1px solid rgba(57,255,20,0.4);
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  transition: all 0.3s ease;
}

.ai-btn:hover {
  background: rgba(57,255,20,0.2);
  box-shadow: var(--glow-green);
  color: var(--acid-green);
}

/* =============================================
   KOL 达人模块
   ============================================= */
.kol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}

.kol-card {
  background: var(--card-bg);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  transition: all 0.4s ease;
}

.kol-card:hover {
  border-color: var(--bright-orange);
  box-shadow: var(--glow-orange);
  transform: translateY(-6px);
}

.kol-avatar {
  position: relative;
  height: 200px;
  overflow: hidden;
}

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

.kol-card:hover .kol-avatar img {
  transform: scale(1.1);
}

.kol-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--bright-orange);
  color: white;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 8px;
}

.kol-info {
  padding: 16px;
}

.kol-name {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 4px;
  color: var(--pure-white);
}

.kol-tag {
  font-size: 0.78rem;
  color: var(--bright-orange);
  margin-bottom: 10px;
}

.kol-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.kol-stats strong {
  display: block;
  font-size: 1rem;
  font-weight: 800;
  color: var(--pure-white);
}

/* =============================================
   用户评价
   ============================================= */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.review-card {
  background: var(--card-bg);
  border-radius: 14px;
  padding: 22px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s ease;
  position: relative;
}

.review-card:hover {
  border-color: rgba(0,180,255,0.3);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.review-quote {
  position: absolute;
  top: 16px;
  right: 18px;
  font-size: 3rem;
  line-height: 1;
  color: rgba(0,180,255,0.15);
  font-family: Georgia, serif;
}

.review-stars {
  color: var(--bright-orange);
  font-size: 0.9rem;
  margin-bottom: 10px;
  text-shadow: var(--glow-orange);
}

.review-text {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.review-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--pure-white);
}

.review-date {
  font-size: 0.75rem;
  color: var(--text-muted);
}

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

.faq-item {
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}

.faq-item.open {
  border-color: rgba(0,180,255,0.3);
}

.faq-question {
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--pure-white);
  transition: color 0.3s ease;
  user-select: none;
}

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

.faq-toggle {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0,180,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--electric-blue);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.faq-item.open .faq-toggle {
  background: var(--electric-blue);
  color: white;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.7;
}

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

/* =============================================
   合作伙伴
   ============================================= */
.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 50px;
}

.partner-logo {
  background: var(--card-bg);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 16px 28px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: all 0.3s ease;
  cursor: pointer;
}

.partner-logo:hover {
  border-color: var(--electric-blue);
  color: var(--electric-blue);
  box-shadow: var(--glow-blue);
}

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

.contact-info h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 20px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 20px;
  padding: 16px;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.06);
}

.contact-item-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--pure-white);
}

.qr-codes {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

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

.qr-placeholder {
  width: 120px;
  height: 120px;
  background: var(--card-bg);
  border: 2px dashed rgba(0,180,255,0.3);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin-bottom: 8px;
}

.qr-label {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* =============================================
   页脚
   ============================================= */
.site-footer {
  background: rgba(0,0,0,0.8);
  border-top: 1px solid rgba(0,180,255,0.15);
  padding: 50px 20px 30px;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}

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

.footer-brand .site-logo {
  font-size: 1.4rem;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.3s ease;
  cursor: pointer;
  color: var(--text-muted);
}

.social-btn:hover {
  background: var(--gradient-main);
  border-color: transparent;
  color: white;
  transform: translateY(-2px);
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 800;
  color: var(--pure-white);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  font-size: 0.83rem;
  color: var(--text-muted);
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: var(--electric-blue);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-copyright {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-copyright strong {
  color: var(--electric-blue);
}

.footer-icp {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.3);
}

/* =============================================
   内页横幅
   ============================================= */
.inner-hero {
  padding: 80px 20px 60px;
  text-align: center;
  background: linear-gradient(180deg, rgba(0,180,255,0.08) 0%, transparent 100%);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.inner-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  margin-bottom: 14px;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
  justify-content: center;
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--electric-blue);
}

.breadcrumb span {
  color: rgba(255,255,255,0.2);
}

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

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

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

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

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(10,10,10,0.97);
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid rgba(0,180,255,0.2);
    gap: 4px;
  }

  .main-nav.open {
    display: flex;
  }

  .hamburger {
    display: flex;
  }

  .hero-stats {
    gap: 24px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 480px) {
  .section {
    padding: 50px 16px;
  }

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

  .btn-primary, .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}

/* =============================================
   渐变动画文字
   ============================================= */
@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.animated-gradient {
  background: linear-gradient(270deg, #00b4ff, #ff2d78, #ff8c00, #39ff14, #00b4ff);
  background-size: 400% 400%;
  animation: gradientShift 4s ease infinite;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 视频标签 */
.video-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.video-tag {
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: 8px;
  background: rgba(0,180,255,0.1);
  color: var(--electric-blue);
  border: 1px solid rgba(0,180,255,0.2);
}