/* ===== 蘑菇视频 - 主样式表 ===== */
/* 暗黑潮流·霓虹金紫渐变·赛博科技娱乐风格 */

:root {
  --bg-primary: #050508;
  --bg-secondary: #0a0a12;
  --bg-card: #0e0e1a;
  --neon-purple: #9b30ff;
  --neon-gold: #ffd700;
  --neon-pink: #ff2d78;
  --neon-cyan: #00e5ff;
  --text-primary: #f0f0f8;
  --text-secondary: #a0a0c0;
  --text-muted: #606080;
  --border-glow: rgba(155, 48, 255, 0.3);
  --gradient-main: linear-gradient(135deg, #9b30ff 0%, #ffd700 100%);
  --gradient-dark: linear-gradient(180deg, #050508 0%, #0a0a12 100%);
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

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

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

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-main);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== 粒子背景 ===== */
#particles-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.4;
}

/* ===== 导航栏 ===== */
.nav-wrapper {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 5, 8, 0.92);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glow);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient-main);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  box-shadow: 0 0 20px rgba(155, 48, 255, 0.5);
}

.nav-logo-text {
  font-size: 22px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-menu a {
  display: block;
  padding: 8px 14px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  border-radius: 8px;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--neon-purple);
  background: rgba(155, 48, 255, 0.12);
  text-shadow: 0 0 10px rgba(155, 48, 255, 0.5);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-primary {
  padding: 9px 22px;
  background: var(--gradient-main);
  color: #000;
  font-weight: 700;
  font-size: 14px;
  border: none;
  border-radius: 24px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s ease;
  box-shadow: 0 0 20px rgba(155, 48, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(155, 48, 255, 0.7);
}

.btn-outline {
  padding: 9px 22px;
  background: transparent;
  color: var(--neon-purple);
  font-weight: 600;
  font-size: 14px;
  border: 1px solid var(--neon-purple);
  border-radius: 24px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s ease;
}

.btn-outline:hover {
  background: rgba(155, 48, 255, 0.15);
  box-shadow: 0 0 20px rgba(155, 48, 255, 0.3);
}

/* ===== 搜索栏 ===== */
.search-bar-wrapper {
  background: rgba(10, 10, 18, 0.9);
  border-bottom: 1px solid rgba(155, 48, 255, 0.15);
  padding: 12px 24px;
  position: relative;
  z-index: 999;
}

.search-bar-inner {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 12px 50px 12px 20px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(155, 48, 255, 0.3);
  border-radius: 30px;
  color: var(--text-primary);
  font-size: 15px;
  font-family: var(--font-main);
  outline: none;
  transition: all 0.3s ease;
}

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

.search-input:focus {
  border-color: var(--neon-purple);
  box-shadow: 0 0 20px rgba(155, 48, 255, 0.25);
  background: rgba(255,255,255,0.07);
}

.search-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  background: var(--gradient-main);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  transition: all 0.3s ease;
}

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

.search-tips {
  display: flex;
  gap: 10px;
  margin-top: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.search-tip-tag {
  padding: 3px 12px;
  background: rgba(155, 48, 255, 0.1);
  border: 1px solid rgba(155, 48, 255, 0.25);
  border-radius: 12px;
  font-size: 12px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}

.search-tip-tag:hover {
  background: rgba(155, 48, 255, 0.2);
  color: var(--neon-purple);
}

/* ===== 主容器 ===== */
.main-container {
  position: relative;
  z-index: 1;
}

.section {
  padding: 80px 24px;
  max-width: 1400px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-block;
  padding: 5px 16px;
  background: rgba(155, 48, 255, 0.15);
  border: 1px solid rgba(155, 48, 255, 0.4);
  border-radius: 20px;
  font-size: 12px;
  color: var(--neon-purple);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 16px;
}

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

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Hero Banner ===== */
.hero-section {
  position: relative;
  min-height: 88vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 0;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5,5,8,0.85) 0%, rgba(155,48,255,0.15) 50%, rgba(5,5,8,0.9) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: 80px 24px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(155, 48, 255, 0.15);
  border: 1px solid rgba(155, 48, 255, 0.4);
  border-radius: 20px;
  font-size: 13px;
  color: var(--neon-purple);
  margin-bottom: 24px;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--neon-purple);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-title .brand-name {
  display: block;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  margin-bottom: 36px;
  line-height: 1.8;
}

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

.hero-stats {
  display: flex;
  gap: 32px;
  margin-top: 48px;
}

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

.hero-stat-num {
  font-size: 28px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.hero-video-preview {
  position: relative;
}

.hero-video-card {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-glow);
  box-shadow: 0 0 60px rgba(155, 48, 255, 0.3);
  cursor: pointer;
}

.hero-video-card img {
  width: 100%;
  display: block;
}

.hero-video-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.hero-video-card:hover .hero-video-overlay {
  background: rgba(0,0,0,0.15);
}

.play-btn-large {
  width: 72px;
  height: 72px;
  background: rgba(155, 48, 255, 0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  box-shadow: 0 0 40px rgba(155, 48, 255, 0.6);
  transition: all 0.3s;
}

.hero-video-card:hover .play-btn-large {
  transform: scale(1.1);
  box-shadow: 0 0 60px rgba(155, 48, 255, 0.9);
}

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

.video-card {
  background: var(--bg-card);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(155, 48, 255, 0.15);
  transition: all 0.4s ease;
  cursor: pointer;
  position: relative;
}

.video-card:hover {
  transform: translateY(-6px);
  border-color: var(--neon-purple);
  box-shadow: 0 20px 60px rgba(155, 48, 255, 0.3);
}

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

.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);
}

.video-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all 0.3s ease;
}

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

.play-btn {
  width: 52px;
  height: 52px;
  background: rgba(155, 48, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: 0 0 30px rgba(155, 48, 255, 0.7);
  transform: scale(0.8);
  transition: all 0.3s ease;
}

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

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  padding: 3px 8px;
  background: rgba(0,0,0,0.75);
  border-radius: 4px;
  font-size: 12px;
  color: #fff;
}

.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  padding: 3px 10px;
  background: var(--gradient-main);
  border-radius: 4px;
  font-size: 11px;
  color: #000;
  font-weight: 700;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-muted);
}

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

/* ===== 社区模块 ===== */
.community-section {
  background: linear-gradient(180deg, transparent 0%, rgba(155,48,255,0.05) 50%, transparent 100%);
}

.community-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.community-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 28px;
  border: 1px solid rgba(155, 48, 255, 0.15);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.community-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--gradient-main);
}

.community-card:hover {
  border-color: rgba(155, 48, 255, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(155, 48, 255, 0.2);
}

.community-topic {
  font-size: 18px;
  font-weight: 700;
  color: var(--neon-purple);
  margin-bottom: 10px;
}

.community-hotness {
  font-size: 13px;
  color: var(--neon-gold);
  margin-bottom: 12px;
}

.community-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 弹幕展示 */
.danmaku-wrapper {
  position: relative;
  height: 80px;
  overflow: hidden;
  margin: 40px 0;
  border-radius: 12px;
  background: rgba(10,10,18,0.8);
  border: 1px solid rgba(155,48,255,0.15);
}

.danmaku-track {
  position: absolute;
  white-space: nowrap;
  display: flex;
  gap: 60px;
  animation: danmaku-scroll 20s linear infinite;
}

.danmaku-track:nth-child(2) {
  top: 40px;
  animation-duration: 28s;
  animation-delay: -10s;
}

@keyframes danmaku-scroll {
  from { transform: translateX(100vw); }
  to { transform: translateX(-100%); }
}

.danmaku-item {
  padding: 4px 14px;
  background: rgba(155,48,255,0.12);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-secondary);
  border: 1px solid rgba(155,48,255,0.2);
  white-space: nowrap;
}

/* ===== AI模块 ===== */
.ai-section {
  position: relative;
}

.ai-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.ai-tools-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ai-tool-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--bg-card);
  border-radius: 14px;
  border: 1px solid rgba(155,48,255,0.15);
  transition: all 0.3s ease;
}

.ai-tool-item:hover {
  border-color: var(--neon-purple);
  box-shadow: 0 8px 30px rgba(155,48,255,0.2);
}

.ai-tool-icon {
  width: 48px;
  height: 48px;
  background: rgba(155,48,255,0.15);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.ai-tool-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 6px;
}

.ai-tool-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.ai-image-wrap {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-glow);
  box-shadow: 0 0 60px rgba(155,48,255,0.2);
}

.ai-image-wrap img {
  width: 100%;
  display: block;
}

/* ===== 专家模块 ===== */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.expert-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(155,48,255,0.15);
  transition: all 0.3s ease;
}

.expert-card:hover {
  border-color: var(--neon-purple);
  transform: translateY(-6px);
  box-shadow: 0 20px 50px rgba(155,48,255,0.25);
}

.expert-avatar {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  margin: 0 auto 16px;
  border: 3px solid transparent;
  background: linear-gradient(var(--bg-card), var(--bg-card)) padding-box,
              var(--gradient-main) border-box;
  overflow: hidden;
}

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

.expert-name {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.expert-title {
  font-size: 13px;
  color: var(--neon-purple);
  margin-bottom: 12px;
}

.expert-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 用户评价 ===== */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 24px;
  border: 1px solid rgba(155,48,255,0.12);
  transition: all 0.3s ease;
  position: relative;
}

.review-card::before {
  content: '"';
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 60px;
  color: rgba(155,48,255,0.15);
  font-family: serif;
  line-height: 1;
}

.review-card:hover {
  border-color: rgba(155,48,255,0.3);
  box-shadow: 0 12px 40px rgba(155,48,255,0.15);
}

.review-stars {
  color: var(--neon-gold);
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
}

.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #000;
  flex-shrink: 0;
}

.review-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

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

/* ===== 合作伙伴 ===== */
.partners-section {
  background: rgba(10,10,18,0.6);
  border-top: 1px solid rgba(155,48,255,0.1);
  border-bottom: 1px solid rgba(155,48,255,0.1);
}

.partners-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
}

.partner-logo {
  padding: 16px 28px;
  background: var(--bg-card);
  border: 1px solid rgba(155,48,255,0.15);
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  cursor: pointer;
}

.partner-logo:hover {
  border-color: var(--neon-purple);
  color: var(--neon-purple);
  box-shadow: 0 0 20px rgba(155,48,255,0.2);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--bg-card);
  border-radius: 14px;
  border: 1px solid rgba(155,48,255,0.15);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item.active {
  border-color: rgba(155,48,255,0.4);
  box-shadow: 0 8px 30px rgba(155,48,255,0.15);
}

.faq-question {
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  transition: color 0.3s;
  gap: 16px;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(155,48,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--neon-purple);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.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;
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid rgba(155,48,255,0.1);
  padding-top: 16px;
}

/* ===== 联系模块 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 32px;
}

.contact-card {
  background: var(--bg-card);
  border-radius: 16px;
  padding: 32px;
  border: 1px solid rgba(155,48,255,0.15);
  text-align: center;
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: rgba(155,48,255,0.15);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  margin: 0 auto 16px;
}

.contact-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-value {
  font-size: 15px;
  color: var(--text-primary);
  font-weight: 500;
}

.qr-placeholder {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(155,48,255,0.3), rgba(255,215,0,0.3));
  border-radius: 12px;
  margin: 16px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  border: 1px solid rgba(155,48,255,0.3);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(155,48,255,0.2);
  padding: 60px 24px 30px;
}

.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(155,48,255,0.1);
  margin-bottom: 32px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 16px;
}

.footer-col-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--neon-purple); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-copyright a {
  color: var(--neon-purple);
  text-decoration: none;
}

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

.social-btn {
  width: 36px;
  height: 36px;
  background: rgba(155,48,255,0.1);
  border: 1px solid rgba(155,48,255,0.25);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  color: var(--text-secondary);
}

.social-btn:hover {
  background: rgba(155,48,255,0.2);
  border-color: var(--neon-purple);
  color: var(--neon-purple);
}

/* ===== 内页面包屑 ===== */
.breadcrumb {
  padding: 16px 24px;
  max-width: 1400px;
  margin: 0 auto;
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

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

.breadcrumb span { margin: 0 8px; }

/* ===== 内页Banner ===== */
.inner-hero {
  padding: 80px 24px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.inner-hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(155,48,255,0.12) 0%, transparent 70%);
  pointer-events: none;
}

/* ===== 移动端汉堡菜单 ===== */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s;
}

/* ===== 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);
}

/* ===== 分隔线 ===== */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(155,48,255,0.3), transparent);
  margin: 0;
}

/* ===== 标签 ===== */
.tag {
  display: inline-block;
  padding: 3px 10px;
  background: rgba(155,48,255,0.12);
  border: 1px solid rgba(155,48,255,0.25);
  border-radius: 6px;
  font-size: 12px;
  color: var(--neon-purple);
  margin: 2px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; gap: 40px; }
  .hero-video-preview { display: none; }
  .ai-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-menu { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(5,5,8,0.98);
    padding: 16px;
    border-bottom: 1px solid var(--border-glow);
    z-index: 999;
  }
  .section { padding: 60px 16px; }
  .hero-stats { gap: 20px; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .video-grid { grid-template-columns: 1fr 1fr; }
  .experts-grid { grid-template-columns: 1fr 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr; }
  .hero-buttons { flex-direction: column; }
  .btn-primary, .btn-outline { text-align: center; }
}