/* ===================================================
   17c 官网主样式 | www.dg3gpc.cn
   活力潮流·街头时尚·年轻文化
   =================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --blue: #00CFFF;
  --pink: #FF2D78;
  --orange: #FF8C00;
  --green: #AAFF00;
  --black: #0A0A0A;
  --dark: #111111;
  --dark2: #1A1A2E;
  --white: #FFFFFF;
  --gray: #888888;
  --card-bg: #161625;
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  --transition: 0.3s ease;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-neon-blue: 0 0 20px rgba(0,207,255,0.6), 0 0 40px rgba(0,207,255,0.3);
  --shadow-neon-pink: 0 0 20px rgba(255,45,120,0.6), 0 0 40px rgba(255,45,120,0.3);
  --shadow-neon-green: 0 0 20px rgba(170,255,0,0.6), 0 0 40px rgba(170,255,0,0.3);
  --shadow-neon-orange: 0 0 20px rgba(255,140,0,0.6), 0 0 40px rgba(255,140,0,0.3);
}

/* ---------- 重置 & 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-main);
  background: var(--black);
  color: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

/* ---------- 滚动条 ---------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--dark); }
::-webkit-scrollbar-thumb { background: var(--blue); border-radius: 3px; }

/* ---------- 粒子动画背景 ---------- */
@keyframes float-particle {
  0%, 100% { transform: translateY(0) translateX(0) scale(1); opacity: 0.7; }
  33% { transform: translateY(-30px) translateX(15px) scale(1.1); opacity: 1; }
  66% { transform: translateY(15px) translateX(-10px) scale(0.9); opacity: 0.5; }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: var(--shadow-neon-blue); }
  50% { box-shadow: var(--shadow-neon-pink); }
}
@keyframes gradient-shift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
@keyframes slide-in-left {
  from { opacity: 0; transform: translateX(-40px); }
  to { opacity: 1; transform: translateX(0); }
}
@keyframes slide-in-up {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes bounce-in {
  0% { transform: scale(0.8); opacity: 0; }
  60% { transform: scale(1.05); opacity: 1; }
  100% { transform: scale(1); }
}
@keyframes neon-flicker {
  0%, 95%, 100% { opacity: 1; }
  96% { opacity: 0.8; }
  97% { opacity: 1; }
  98% { opacity: 0.6; }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 顶部公告栏 ---------- */
.top-bar {
  background: linear-gradient(90deg, var(--pink), var(--blue), var(--green), var(--orange), var(--pink));
  background-size: 400% 400%;
  animation: gradient-shift 4s ease infinite;
  text-align: center;
  padding: 8px 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--black);
  overflow: hidden;
}
.top-bar .marquee-wrap { display: flex; white-space: nowrap; }
.top-bar .marquee-content { animation: marquee 20s linear infinite; display: inline-block; }

/* ---------- 导航栏 ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,10,10,0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0,207,255,0.2);
  padding: 0 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.navbar .logo {
  font-size: 2rem;
  font-weight: 900;
  letter-spacing: -1px;
  background: linear-gradient(135deg, var(--blue), var(--pink), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: neon-flicker 5s infinite;
}
.navbar .logo span { color: var(--orange); -webkit-text-fill-color: var(--orange); }
.nav-links { display: flex; gap: 5px; align-items: center; }
.nav-links a {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  transition: all var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--blue);
  transition: width var(--transition);
  border-radius: 2px;
}
.nav-links a:hover { color: var(--blue); background: rgba(0,207,255,0.1); }
.nav-links a:hover::after { width: 70%; }
.nav-links a.active { color: var(--blue); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { width: 25px; height: 2px; background: var(--white); transition: all var(--transition); border-radius: 2px; }

/* ---------- 搜索框 ---------- */
.search-bar-section {
  background: var(--dark2);
  padding: 16px 5%;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.search-bar-inner {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  gap: 10px;
  align-items: center;
}
.search-bar-inner input {
  flex: 1;
  background: rgba(255,255,255,0.07);
  border: 1.5px solid rgba(0,207,255,0.3);
  border-radius: 50px;
  padding: 12px 22px;
  color: var(--white);
  font-size: 15px;
  font-family: var(--font-main);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-bar-inner input::placeholder { color: var(--gray); }
.search-bar-inner input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 15px rgba(0,207,255,0.3);
}
.search-bar-inner button {
  background: linear-gradient(135deg, var(--blue), var(--pink));
  color: var(--white);
  border-radius: 50px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
  transition: all var(--transition);
}
.search-bar-inner button:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-neon-blue);
}

/* ---------- Hero Banner ---------- */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/banner-hero.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
  transform: scale(1.05);
  transition: transform 10s ease;
}
.hero:hover .hero-bg { transform: scale(1); }
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,207,255,0.15) 0%, rgba(255,45,120,0.1) 50%, rgba(170,255,0,0.08) 100%);
}
.hero-particles { position: absolute; inset: 0; pointer-events: none; }
.particle {
  position: absolute;
  border-radius: 50%;
  animation: float-particle linear infinite;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 0 5%;
  max-width: 800px;
  animation: slide-in-left 0.8s ease both;
}
.hero-badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--blue), var(--pink));
  color: var(--white);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 20px;
  text-shadow: 0 0 30px rgba(0,207,255,0.5);
}
.hero h1 .brand { color: var(--blue); text-shadow: var(--shadow-neon-blue); }
.hero h1 .accent { color: var(--pink); }
.hero p {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: rgba(255,255,255,0.85);
  margin-bottom: 35px;
  max-width: 550px;
}
.hero-btns { display: flex; gap: 15px; flex-wrap: wrap; }
.btn-primary {
  background: linear-gradient(135deg, var(--blue), var(--pink));
  color: var(--white);
  padding: 16px 36px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 1px;
  transition: all var(--transition);
  animation: pulse-glow 3s infinite;
}
.btn-primary:hover { transform: translateY(-3px) scale(1.05); }
.btn-secondary {
  background: transparent;
  border: 2px solid var(--green);
  color: var(--green);
  padding: 14px 34px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 700;
  transition: all var(--transition);
}
.btn-secondary:hover {
  background: var(--green);
  color: var(--black);
  box-shadow: var(--shadow-neon-green);
  transform: translateY(-3px);
}
.hero-stats {
  position: absolute;
  bottom: 40px;
  right: 5%;
  display: flex;
  gap: 30px;
  z-index: 2;
}
.hero-stat { text-align: center; }
.hero-stat .num {
  font-size: 2rem;
  font-weight: 900;
  color: var(--blue);
  text-shadow: var(--shadow-neon-blue);
  display: block;
}
.hero-stat .label { font-size: 12px; color: rgba(255,255,255,0.6); }

/* ---------- 通用区块 ---------- */
.section { padding: 80px 5%; }
.section-alt { background: var(--dark2); }
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 15px;
}
.section-header h2 .c-blue { color: var(--blue); }
.section-header h2 .c-pink { color: var(--pink); }
.section-header h2 .c-green { color: var(--green); }
.section-header h2 .c-orange { color: var(--orange); }
.section-header p { color: rgba(255,255,255,0.65); max-width: 600px; margin: 0 auto; font-size: 1rem; }
.divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--pink));
  border-radius: 2px;
  margin: 15px auto 0;
}

/* ---------- 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: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  cursor: pointer;
  position: relative;
}
.video-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: var(--blue);
  box-shadow: 0 20px 60px rgba(0,207,255,0.4), 0 0 30px rgba(255,45,120,0.2), inset 0 0 20px rgba(0,207,255,0.05);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.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);
}
.play-btn {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  background: radial-gradient(circle, rgba(0,207,255,0.3) 0%, transparent 70%);
}
.video-card:hover .play-btn { opacity: 1; }
.play-icon {
  width: 64px;
  height: 64px;
  background: rgba(0,207,255,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-neon-blue);
  animation: bounce-in 0.3s ease both;
  transition: transform var(--transition);
}
.play-icon:hover { transform: scale(1.15); }
.play-icon svg { width: 28px; height: 28px; fill: var(--black); margin-left: 4px; }
.video-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--pink);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 4px;
  letter-spacing: 1px;
}
.video-duration {
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: rgba(0,0,0,0.8);
  color: var(--white);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
}
.video-info { padding: 16px; }
.video-info h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-card:hover .video-info h3 { color: var(--blue); }
.video-meta {
  display: flex;
  gap: 12px;
  font-size: 12px;
  color: var(--gray);
  align-items: center;
}
.video-meta span { display: flex; align-items: center; gap: 4px; }
.video-meta .tag {
  background: rgba(0,207,255,0.1);
  color: var(--blue);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 11px;
}

/* ---------- 社区模块 ---------- */
.community-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}
.topic-list { display: flex; flex-direction: column; gap: 12px; }
.topic-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 18px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
  cursor: pointer;
}
.topic-item:hover {
  border-color: var(--pink);
  background: rgba(255,45,120,0.08);
  transform: translateX(5px);
}
.topic-rank {
  font-size: 1.3rem;
  font-weight: 900;
  min-width: 36px;
  text-align: center;
}
.topic-rank.r1 { color: var(--orange); }
.topic-rank.r2 { color: var(--gray); }
.topic-rank.r3 { color: #CD7F32; }
.topic-rank.other { color: var(--gray); font-size: 1rem; }
.topic-text h4 { font-size: 14px; font-weight: 700; margin-bottom: 3px; }
.topic-text span { font-size: 12px; color: var(--gray); }
.topic-hot { margin-left: auto; color: var(--pink); font-size: 12px; font-weight: 700; }
.danmu-box {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 20px;
  border: 1px solid rgba(0,207,255,0.2);
  height: 100%;
  overflow: hidden;
}
.danmu-box h3 { font-size: 16px; margin-bottom: 15px; color: var(--blue); }
.danmu-stream { height: 280px; overflow: hidden; position: relative; }
.danmu-item {
  padding: 8px 14px;
  border-radius: 20px;
  font-size: 13px;
  margin-bottom: 8px;
  display: inline-block;
  animation: slide-in-left 0.5s ease both;
  white-space: nowrap;
}
.danmu-item.blue { background: rgba(0,207,255,0.15); border: 1px solid rgba(0,207,255,0.3); color: var(--blue); }
.danmu-item.pink { background: rgba(255,45,120,0.15); border: 1px solid rgba(255,45,120,0.3); color: var(--pink); }
.danmu-item.green { background: rgba(170,255,0,0.15); border: 1px solid rgba(170,255,0,0.3); color: var(--green); }
.danmu-item.orange { background: rgba(255,140,0,0.15); border: 1px solid rgba(255,140,0,0.3); color: var(--orange); }

/* ---------- AI模块 ---------- */
.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.ai-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  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: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--pink));
  transform: scaleX(0);
  transition: transform var(--transition);
}
.ai-card:hover::before { transform: scaleX(1); }
.ai-card:hover {
  transform: translateY(-6px);
  border-color: var(--blue);
  box-shadow: 0 15px 40px rgba(0,207,255,0.25);
}
.ai-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  display: block;
}
.ai-card h3 { font-size: 16px; font-weight: 800; margin-bottom: 10px; color: var(--blue); }
.ai-card p { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.6; }

/* ---------- KOL达人 ---------- */
.kol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 24px;
}
.kol-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all 0.4s ease;
  text-align: center;
}
.kol-card:hover {
  transform: translateY(-8px);
  border-color: var(--pink);
  box-shadow: 0 20px 50px rgba(255,45,120,0.3);
}
.kol-avatar {
  position: relative;
  aspect-ratio: 1;
  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;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--pink), var(--orange));
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 20px;
  white-space: nowrap;
}
.kol-info { padding: 16px; }
.kol-info h3 { font-size: 16px; font-weight: 800; margin-bottom: 5px; }
.kol-info .tag { font-size: 12px; color: var(--blue); margin-bottom: 10px; }
.kol-stats { display: flex; justify-content: center; gap: 20px; }
.kol-stat { text-align: center; }
.kol-stat .n { font-size: 14px; font-weight: 800; color: var(--pink); }
.kol-stat .l { font-size: 11px; color: var(--gray); }

/* ---------- 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: var(--radius-lg);
  padding: 24px;
  border: 1px solid rgba(255,255,255,0.06);
  transition: all var(--transition);
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 5rem;
  color: rgba(0,207,255,0.1);
  font-family: serif;
  line-height: 1;
}
.review-card:hover {
  border-color: var(--blue);
  box-shadow: 0 10px 30px rgba(0,207,255,0.15);
  transform: translateY(-4px);
}
.review-stars { color: var(--orange); font-size: 16px; margin-bottom: 12px; }
.review-text { font-size: 14px; color: rgba(255,255,255,0.8); line-height: 1.7; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 12px; }
.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--pink));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  flex-shrink: 0;
}
.review-name { font-size: 14px; font-weight: 700; }
.review-date { font-size: 12px; color: var(--gray); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item.open { border-color: var(--blue); }
.faq-q {
  padding: 18px 22px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 15px;
  font-weight: 700;
  transition: color var(--transition);
  gap: 15px;
}
.faq-q:hover { color: var(--blue); }
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0,207,255,0.1);
  border: 1px solid rgba(0,207,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
  color: var(--blue);
  transition: transform var(--transition), background var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--blue); color: var(--black); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 300px; padding: 0 22px 18px; }

/* ---------- 合作伙伴 ---------- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 16px;
  margin-bottom: 50px;
}
.partner-logo {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.06);
  font-size: 13px;
  font-weight: 700;
  color: var(--gray);
  text-align: center;
  transition: all var(--transition);
  min-height: 70px;
}
.partner-logo:hover {
  border-color: var(--blue);
  color: var(--blue);
  box-shadow: 0 0 15px rgba(0,207,255,0.2);
}

/* ---------- 联系模块 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 30px;
}
.contact-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 30px;
  border: 1px solid rgba(255,255,255,0.06);
  text-align: center;
  transition: all var(--transition);
}
.contact-card:hover {
  border-color: var(--blue);
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0,207,255,0.2);
}
.contact-icon { font-size: 2.5rem; margin-bottom: 15px; }
.contact-card h3 { font-size: 18px; font-weight: 800; margin-bottom: 10px; color: var(--blue); }
.contact-card p { font-size: 14px; color: rgba(255,255,255,0.65); line-height: 1.7; }
.qr-placeholder {
  width: 120px;
  height: 120px;
  background: var(--white);
  border-radius: 10px;
  margin: 15px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--black);
  font-weight: 700;
}

/* ---------- 页脚 ---------- */
footer {
  background: #050505;
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 50px 5% 25px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo {
  font-size: 2rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--blue), var(--pink));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 12px;
}
.footer-brand p { font-size: 13px; color: var(--gray); line-height: 1.8; max-width: 280px; }
.footer-social { display: flex; gap: 10px; margin-top: 20px; }
.social-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  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: 16px;
  transition: all var(--transition);
  cursor: pointer;
}
.social-btn:hover { background: var(--blue); border-color: var(--blue); transform: scale(1.1); }
.footer-col h4 { font-size: 15px; font-weight: 800; margin-bottom: 16px; color: var(--white); }
.footer-col ul { display: flex; flex-direction: column; gap: 9px; }
.footer-col ul li a { font-size: 13px; color: var(--gray); transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--blue); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding-top: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}
.footer-bottom p { font-size: 12px; color: var(--gray); }
.footer-bottom a { color: var(--blue); }
.footer-icp { font-size: 12px; color: var(--gray); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 15px 5%;
  background: var(--dark2);
  font-size: 13px;
  color: var(--gray);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.breadcrumb a { color: var(--blue); }
.breadcrumb span { margin: 0 8px; }

/* ---------- 内页Banner ---------- */
.inner-banner {
  position: relative;
  height: 350px;
  overflow: hidden;
  display: flex;
  align-items: center;
}
.inner-banner-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.4);
}
.inner-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,207,255,0.2), rgba(255,45,120,0.15));
}
.inner-banner-content {
  position: relative;
  z-index: 2;
  padding: 0 5%;
}
.inner-banner h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  margin-bottom: 12px;
  text-shadow: 0 0 30px rgba(0,207,255,0.5);
}
.inner-banner p { font-size: 1.1rem; color: rgba(255,255,255,0.8); max-width: 500px; }

/* ---------- 标签云 ---------- */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
.tag-item {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  border: 1px solid;
}
.tag-item.blue { border-color: var(--blue); color: var(--blue); background: rgba(0,207,255,0.08); }
.tag-item.pink { border-color: var(--pink); color: var(--pink); background: rgba(255,45,120,0.08); }
.tag-item.green { border-color: var(--green); color: var(--green); background: rgba(170,255,0,0.08); }
.tag-item.orange { border-color: var(--orange); color: var(--orange); background: rgba(255,140,0,0.08); }
.tag-item:hover { transform: scale(1.05); }
.tag-item.blue:hover { background: var(--blue); color: var(--black); }
.tag-item.pink:hover { background: var(--pink); color: var(--white); }
.tag-item.green:hover { background: var(--green); color: var(--black); }
.tag-item.orange:hover { background: var(--orange); color: var(--black); }

/* ---------- 移动端导航 ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: rgba(10,10,10,0.98);
  backdrop-filter: blur(20px);
  z-index: 999;
  padding: 20px 5%;
  border-bottom: 1px solid rgba(0,207,255,0.2);
  flex-direction: column;
  gap: 5px;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(255,255,255,0.8);
  transition: all var(--transition);
}
.mobile-menu a:hover { background: rgba(0,207,255,0.1); color: var(--blue); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr 1fr; }
  .community-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .hero { min-height: 70vh; }
  .hero-stats { position: static; margin-top: 30px; justify-content: flex-start; }
  .hero-content { padding: 40px 5%; }
  .footer-grid { grid-template-columns: 1fr; gap: 25px; }
  .contact-grid { grid-template-columns: 1fr; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
  .section { padding: 50px 5%; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .hero h1 { font-size: 2rem; }
  .hero-btns { flex-direction: column; }
  .btn-primary, .btn-secondary { text-align: center; }
  .video-grid { grid-template-columns: 1fr; }
  .kol-grid { grid-template-columns: repeat(2, 1fr); }
  .reviews-grid { grid-template-columns: 1fr; }
}

/* ---------- 工具类 ---------- */
.text-blue { color: var(--blue); }
.text-pink { color: var(--pink); }
.text-green { color: var(--green); }
.text-orange { color: var(--orange); }
.text-center { text-align: center; }
.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.hidden { display: none; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-10 { gap: 10px; }
.gap-20 { gap: 20px; }