/* 17C 潮流生活社区 - 主样式文件 */
:root {
  --electric-blue: #00BFFF;
  --neon-pink: #FF2D78;
  --acid-green: #39FF14;
  --bright-orange: #FF8C00;
  --pure-black: #0A0A0A;
  --pure-white: #FFFFFF;
  --dark-bg: #0D0D1A;
  --card-bg: #13131F;
  --gradient-main: linear-gradient(135deg, #00BFFF 0%, #FF2D78 50%, #39FF14 100%);
  --gradient-hero: linear-gradient(135deg, #0D0D1A 0%, #1A0A2E 50%, #0A1A2E 100%);
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-main);
  background: var(--dark-bg);
  color: var(--pure-white);
  overflow-x: hidden;
  line-height: 1.6;
}

/* ===== 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;
}

/* ===== 顶部导航 ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 10, 26, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 191, 255, 0.2);
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  background: rgba(10, 10, 26, 0.98);
  box-shadow: 0 2px 20px rgba(0, 191, 255, 0.15);
}

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

.nav-logo .logo-text {
  font-size: 2rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -1px;
  text-shadow: none;
  filter: drop-shadow(0 0 8px rgba(0,191,255,0.5));
}

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

.nav-menu a {
  display: block;
  padding: 8px 14px;
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: 6px;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.nav-menu a:hover {
  color: var(--electric-blue);
  background: rgba(0,191,255,0.1);
  text-shadow: 0 0 10px rgba(0,191,255,0.6);
}

.nav-menu a.active {
  color: var(--neon-pink);
  background: rgba(255,45,120,0.1);
}

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

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

/* ===== 搜索框 ===== */
.search-bar-wrap {
  background: rgba(13,13,26,0.95);
  border-bottom: 1px solid rgba(57,255,20,0.15);
  padding: 10px 5%;
  display: flex;
  justify-content: center;
  position: relative;
  z-index: 999;
  margin-top: 64px;
}

.search-bar {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 680px;
  background: rgba(255,255,255,0.05);
  border: 1.5px solid rgba(0,191,255,0.3);
  border-radius: 30px;
  padding: 8px 20px;
  gap: 10px;
  transition: border-color 0.3s;
}

.search-bar:focus-within {
  border-color: var(--electric-blue);
  box-shadow: 0 0 15px rgba(0,191,255,0.2);
}

.search-bar input {
  flex: 1;
  background: none;
  border: none;
  outline: none;
  color: #fff;
  font-size: 0.95rem;
  font-family: var(--font-main);
}

.search-bar input::placeholder { color: rgba(255,255,255,0.4); }

.search-bar button {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--electric-blue);
  font-size: 1.1rem;
  padding: 4px;
  display: flex;
  align-items: center;
  transition: color 0.2s;
}

.search-bar button:hover { color: var(--neon-pink); }

/* ===== 通用容器 ===== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 5%;
  position: relative;
  z-index: 1;
}

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

.section-title h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.section-title p {
  color: rgba(255,255,255,0.6);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

.section-tag {
  display: inline-block;
  background: rgba(0,191,255,0.1);
  border: 1px solid rgba(0,191,255,0.3);
  color: var(--electric-blue);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
}

/* ===== Hero Banner ===== */
.hero-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 80px 5% 60px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 0;
}

.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/banner_hero.jpg') center/cover no-repeat;
  opacity: 0.25;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(0,191,255,0.15) 0%, transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(255,45,120,0.15) 0%, transparent 60%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(57,255,20,0.1);
  border: 1px solid rgba(57,255,20,0.3);
  color: var(--acid-green);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 24px;
  animation: pulse-glow 2s infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 8px rgba(57,255,20,0.3); }
  50% { box-shadow: 0 0 20px rgba(57,255,20,0.6); }
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -2px;
}

.hero-title .brand {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 15px rgba(0,191,255,0.4));
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255,255,255,0.75);
  margin-bottom: 36px;
  line-height: 1.7;
  max-width: 560px;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--neon-pink), var(--electric-blue));
  color: #fff;
  font-weight: 800;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: 50px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(255,45,120,0.4);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--electric-blue), var(--neon-pink));
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover::before { opacity: 1; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,45,120,0.5); }
.btn-primary span { position: relative; z-index: 1; }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--electric-blue);
  font-weight: 700;
  font-size: 1rem;
  padding: 13px 30px;
  border-radius: 50px;
  text-decoration: none;
  border: 2px solid var(--electric-blue);
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: rgba(0,191,255,0.1);
  box-shadow: 0 0 20px rgba(0,191,255,0.3);
  transform: translateY(-2px);
}

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}

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

.hero-stat .num {
  font-size: 1.8rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-stat .label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

/* ===== 视频卡片 ===== */
.section-pad {
  padding: 80px 0;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 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 0.35s ease;
  cursor: pointer;
  position: relative;
}

.video-card:hover {
  transform: translateY(-6px);
  border-color: var(--electric-blue);
  box-shadow: 0 0 30px rgba(0,191,255,0.3), 0 0 60px rgba(255,45,120,0.15);
}

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

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

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

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

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

.play-icon {
  width: 60px;
  height: 60px;
  background: rgba(255,45,120,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 0 30px rgba(255,45,120,0.6);
  animation: play-pulse 1.5s infinite;
}

@keyframes play-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.video-glow-overlay {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s;
  background: linear-gradient(135deg, rgba(0,191,255,0.2), rgba(255,45,120,0.2));
  mix-blend-mode: screen;
}

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

.video-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--neon-pink);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 12px;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
  color: #fff;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  gap: 14px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
}

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

.video-author {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.author-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  object-fit: cover;
  border: 1.5px solid var(--electric-blue);
}

.author-name {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.7);
}

/* ===== 社区模块 ===== */
.community-section {
  background: rgba(13,13,26,0.8);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.topic-card {
  background: var(--card-bg);
  border-radius: 14px;
  padding: 20px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
  cursor: pointer;
}

.topic-card:hover {
  border-color: var(--acid-green);
  box-shadow: 0 0 20px rgba(57,255,20,0.15);
  transform: translateY(-3px);
}

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

.topic-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.topic-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}

.topic-posts {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
  margin-top: 2px;
}

.topic-desc {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.5;
  margin-bottom: 14px;
}

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.topic-tag {
  background: rgba(0,191,255,0.1);
  color: var(--electric-blue);
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 10px;
  border: 1px solid rgba(0,191,255,0.2);
}

/* ===== 弹幕效果 ===== */
.danmaku-wrap {
  overflow: hidden;
  height: 44px;
  position: relative;
  margin: 24px 0;
  background: rgba(255,255,255,0.03);
  border-radius: 8px;
}

.danmaku-track {
  display: flex;
  gap: 40px;
  animation: danmaku-scroll 20s linear infinite;
  white-space: nowrap;
  padding: 10px 0;
}

@keyframes danmaku-scroll {
  from { transform: translateX(100vw); }
  to { transform: translateX(-200%); }
}

.danmaku-item {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
  padding: 4px 14px;
  background: rgba(255,255,255,0.05);
  border-radius: 20px;
  border: 1px solid rgba(255,255,255,0.1);
  white-space: nowrap;
}

/* ===== AI模块 ===== */
.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.ai-tool-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 28px 24px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
  cursor: pointer;
  text-align: center;
}

.ai-tool-card:hover {
  border-color: var(--neon-pink);
  box-shadow: 0 0 25px rgba(255,45,120,0.2);
  transform: translateY(-4px);
}

.ai-tool-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.ai-tool-name {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.ai-tool-desc {
  font-size: 0.84rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.5;
}

.ai-tool-badge {
  display: inline-block;
  margin-top: 14px;
  background: rgba(57,255,20,0.1);
  color: var(--acid-green);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 10px;
  border: 1px solid rgba(57,255,20,0.2);
}

/* ===== 达人模块 ===== */
.kol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}

.kol-card {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 24px 20px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
  cursor: pointer;
}

.kol-card:hover {
  border-color: var(--bright-orange);
  box-shadow: 0 0 25px rgba(255,140,0,0.2);
  transform: translateY(-4px);
}

.kol-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid transparent;
  background: var(--gradient-main);
  background-clip: padding-box;
  margin: 0 auto 14px;
  display: block;
  position: relative;
}

.kol-avatar-wrap {
  position: relative;
  width: 80px;
  margin: 0 auto 14px;
}

.kol-avatar-wrap::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--gradient-main);
  z-index: 0;
}

.kol-avatar-wrap img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  object-fit: cover;
  position: relative;
  z-index: 1;
  border: 2px solid var(--dark-bg);
}

.kol-name {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.kol-title {
  font-size: 0.78rem;
  color: var(--electric-blue);
  margin-bottom: 12px;
}

.kol-stats {
  display: flex;
  justify-content: center;
  gap: 20px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.5);
}

.kol-stat-num {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--neon-pink);
  display: block;
}

/* ===== 评价模块 ===== */
.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: 24px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
}

.review-card:hover {
  border-color: rgba(0,191,255,0.3);
  box-shadow: 0 0 20px rgba(0,191,255,0.1);
}

.review-stars {
  color: #FFD700;
  font-size: 0.9rem;
  margin-bottom: 12px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.75);
  line-height: 1.6;
  margin-bottom: 16px;
}

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

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: #fff;
  flex-shrink: 0;
}

.review-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
}

.review-tag {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.45);
}

/* ===== 合作模块 ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 16px;
  margin-bottom: 60px;
}

.partner-item {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.3s;
  cursor: pointer;
}

.partner-item:hover {
  border-color: rgba(0,191,255,0.3);
  box-shadow: 0 0 15px rgba(0,191,255,0.1);
}

.partner-logo {
  font-size: 2rem;
  margin-bottom: 8px;
  display: block;
}

.partner-name {
  font-size: 0.82rem;
  color: rgba(255,255,255,0.6);
}

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

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

.faq-item.open {
  border-color: rgba(0,191,255,0.3);
}

.faq-question {
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  gap: 16px;
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: rgba(0,191,255,0.1);
  border: 1px solid rgba(0,191,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--electric-blue);
  flex-shrink: 0;
  transition: transform 0.3s;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  padding: 0 24px;
  font-size: 0.88rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  max-height: 200px;
  padding-bottom: 18px;
}

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

.contact-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 0.3s;
}

.contact-card:hover {
  border-color: rgba(57,255,20,0.3);
  box-shadow: 0 0 20px rgba(57,255,20,0.1);
}

.contact-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  display: block;
}

.contact-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
}

.contact-value {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
}

.qr-placeholder {
  width: 100px;
  height: 100px;
  background: linear-gradient(135deg, rgba(0,191,255,0.2), rgba(255,45,120,0.2));
  border: 2px dashed rgba(0,191,255,0.4);
  border-radius: 12px;
  margin: 16px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

/* ===== 页脚 ===== */
.footer {
  background: rgba(5,5,15,0.98);
  border-top: 1px solid rgba(0,191,255,0.1);
  padding: 48px 5% 24px;
  position: relative;
  z-index: 1;
}

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

.footer-brand .logo-text {
  font-size: 2.2rem;
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.6;
  margin-bottom: 20px;
}

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

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s;
  text-decoration: none;
  color: rgba(255,255,255,0.6);
}

.social-btn:hover {
  background: rgba(0,191,255,0.1);
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 0.83rem;
  color: rgba(255,255,255,0.5);
  text-decoration: none;
  transition: color 0.2s;
}

.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: 0.82rem;
  color: rgba(255,255,255,0.35);
}

.footer-beian {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}

.footer-beian a {
  color: rgba(255,255,255,0.4);
  text-decoration: none;
}

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

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

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

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    background: rgba(10,10,26,0.98);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    border-bottom: 1px solid rgba(0,191,255,0.2);
  }

  .nav-menu.open { display: flex; }
  .nav-toggle { display: flex; }

  .hero-section { padding: 100px 5% 60px; }
  .hero-btns { flex-direction: column; }
  .hero-stats { gap: 24px; }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 30px;
  }

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

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

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

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
  .kol-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .reviews-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 内页样式 ===== */
.inner-hero {
  padding: 120px 5% 60px;
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.inner-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(0,191,255,0.1) 0%, transparent 70%);
}

.inner-hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  transition: color 0.2s;
}

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

.breadcrumb span { color: rgba(255,255,255,0.25); }

.inner-hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.inner-hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
  max-width: 600px;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark-bg); }
::-webkit-scrollbar-thumb {
  background: linear-gradient(var(--electric-blue), var(--neon-pink));
  border-radius: 3px;
}

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--neon-pink), var(--electric-blue));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.3s;
  border: none;
  color: #fff;
  font-size: 1.1rem;
  box-shadow: 0 4px 15px rgba(255,45,120,0.4);
}

.back-to-top.show {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255,45,120,0.5);
}