/* ========================================
   17C 品牌官网 - 主样式文件
   高端时尚·明亮潮流·沉浸式科技娱乐风格
   ======================================== */

/* CSS 变量 */
:root {
  --color-primary: #e040fb;
  --color-secondary: #00b0ff;
  --color-accent: #7c4dff;
  --color-bg: #f8f9ff;
  --color-white: #ffffff;
  --color-dark: #1a1a2e;
  --color-text: #2d2d4e;
  --color-text-light: #6b7280;
  --color-border: #e5e7eb;
  --gradient-neon: linear-gradient(135deg, #e040fb 0%, #7c4dff 50%, #00b0ff 100%);
  --gradient-light: linear-gradient(135deg, rgba(224,64,251,0.08) 0%, rgba(0,176,255,0.08) 100%);
  --shadow-neon: 0 0 20px rgba(224,64,251,0.3), 0 0 40px rgba(0,176,255,0.2);
  --shadow-card: 0 4px 24px rgba(0,0,0,0.08);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-main: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
}

/* 全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

ul, ol {
  list-style: none;
}

/* ========================================
   布局容器
   ======================================== */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-sm {
  padding: 48px 0;
}

/* ========================================
   顶部导航
   ======================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(224,64,251,0.12);
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  background: var(--gradient-neon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.site-logo span {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  -webkit-text-fill-color: var(--color-text-light);
  color: var(--color-text-light);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text);
  transition: var(--transition);
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a.active {
  background: var(--gradient-light);
  color: var(--color-primary);
}

.nav-cta {
  background: var(--gradient-neon) !important;
  color: white !important;
  -webkit-text-fill-color: white !important;
  padding: 8px 20px !important;
  border-radius: 20px !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 15px rgba(224,64,251,0.35);
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(224,64,251,0.45) !important;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: none;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ========================================
   搜索框
   ======================================== */
.search-bar-wrap {
  background: linear-gradient(135deg, rgba(224,64,251,0.05) 0%, rgba(0,176,255,0.05) 100%);
  border-bottom: 1px solid rgba(224,64,251,0.08);
  padding: 12px 0;
}

.search-bar-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  max-width: 700px;
  margin: 0 auto;
  padding: 0 20px;
}

.search-input-wrap {
  flex: 1;
  position: relative;
}

.search-input {
  width: 100%;
  padding: 12px 20px 12px 48px;
  border: 2px solid rgba(224,64,251,0.2);
  border-radius: 30px;
  background: white;
  font-size: 0.95rem;
  font-family: var(--font-main);
  color: var(--color-text);
  outline: none;
  transition: var(--transition);
  cursor: pointer;
}

.search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(224,64,251,0.1);
}

.search-icon {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-primary);
  font-size: 1.1rem;
}

.search-btn {
  padding: 12px 28px;
  background: var(--gradient-neon);
  color: white;
  border: none;
  border-radius: 30px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  font-family: var(--font-main);
}

.search-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-neon);
}

/* ========================================
   首屏 Banner
   ======================================== */
.hero-section {
  position: relative;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, #f0e6ff 0%, #e6f4ff 50%, #ffe6f9 100%);
}

.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.45;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(248,249,255,0.7) 0%, rgba(248,249,255,0.3) 100%);
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  border-radius: 50%;
  animation: float-particle 8s infinite ease-in-out;
}

@keyframes float-particle {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.6; }
  50% { transform: translateY(-30px) scale(1.1); opacity: 1; }
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.8);
  border: 1px solid rgba(224,64,251,0.2);
  border-radius: 20px;
  padding: 6px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 20px;
  backdrop-filter: blur(10px);
}

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

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.7; }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 16px;
  color: var(--color-dark);
}

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

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-light);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

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

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--gradient-neon);
  color: white;
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 700;
  transition: var(--transition);
  box-shadow: 0 6px 24px rgba(224,64,251,0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(224,64,251,0.5);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: white;
  color: var(--color-primary);
  border: 2px solid rgba(224,64,251,0.3);
  border-radius: 30px;
  font-size: 1rem;
  font-weight: 700;
  transition: var(--transition);
}

.btn-secondary:hover {
  border-color: var(--color-primary);
  background: rgba(224,64,251,0.05);
  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-neon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
}

.hero-stat-label {
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

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

.section-tag {
  display: inline-block;
  background: var(--gradient-light);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  border: 1px solid rgba(224,64,251,0.15);
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  color: var(--color-dark);
  line-height: 1.2;
  margin-bottom: 12px;
}

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

.section-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 560px;
  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: white;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}

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

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

.video-card:hover .video-thumb img {
  transform: scale(1.05);
}

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

.video-card:hover .video-play-btn {
  opacity: 1;
  background: rgba(0,0,0,0.35);
}

.play-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-neon);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 30px rgba(224,64,251,0.6);
  transform: scale(0.8);
  transition: var(--transition);
}

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

.play-icon::after {
  content: '';
  width: 0;
  height: 0;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  border-left: 18px solid white;
  margin-left: 4px;
}

.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.75);
  color: white;
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 600;
}

.video-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--gradient-neon);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
}

.video-info {
  padding: 16px;
}

.video-title {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-dark);
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

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

.video-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 10px;
}

.tag {
  background: var(--gradient-light);
  color: var(--color-primary);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 10px;
  border: 1px solid rgba(224,64,251,0.15);
}

/* ========================================
   社区模块
   ======================================== */
.community-section {
  background: linear-gradient(135deg, #fdf0ff 0%, #f0f8ff 100%);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-bottom: 40px;
}

.topic-card {
  background: white;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  border: 1px solid rgba(224,64,251,0.08);
}

.topic-card:hover {
  transform: translateY(-4px);
  border-color: rgba(224,64,251,0.25);
  box-shadow: 0 8px 32px rgba(224,64,251,0.12);
}

.topic-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.topic-hot {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.topic-hot span {
  color: var(--color-primary);
  font-weight: 700;
}

/* 弹幕展示 */
.danmaku-wrap {
  background: var(--color-dark);
  border-radius: var(--radius-md);
  padding: 24px;
  overflow: hidden;
  position: relative;
  height: 120px;
}

.danmaku-row {
  display: flex;
  gap: 32px;
  animation: danmaku-scroll 20s linear infinite;
  white-space: nowrap;
  margin-bottom: 12px;
}

.danmaku-row:nth-child(2) {
  animation-duration: 25s;
  animation-delay: -10s;
}

@keyframes danmaku-scroll {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}

.danmaku-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: 20px;
  padding: 6px 16px;
  color: white;
  font-size: 0.85rem;
  white-space: nowrap;
}

.danmaku-item.pink { color: #ff80ab; }
.danmaku-item.blue { color: #80d8ff; }
.danmaku-item.purple { color: #ea80fc; }

/* ========================================
   AI 模块
   ======================================== */
.ai-section {
  background: white;
}

.ai-tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}

.ai-tool-card {
  background: var(--gradient-light);
  border: 1px solid rgba(224,64,251,0.15);
  border-radius: var(--radius-md);
  padding: 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-tool-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(224,64,251,0.05) 0%, transparent 70%);
  pointer-events: none;
}

.ai-tool-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(224,64,251,0.15);
  border-color: rgba(224,64,251,0.3);
}

.ai-tool-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-neon);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(224,64,251,0.3);
}

.ai-tool-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.ai-tool-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.ai-tool-badge {
  display: inline-block;
  background: var(--gradient-neon);
  color: white;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 10px;
  margin-top: 16px;
}

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

.expert-card {
  background: white;
  border-radius: var(--radius-md);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  border: 1px solid var(--color-border);
}

.expert-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(224,64,251,0.12);
  border-color: rgba(224,64,251,0.2);
}

.expert-avatar {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 16px;
  border: 3px solid transparent;
  background: var(--gradient-neon) border-box;
  box-shadow: 0 0 0 3px white, 0 0 0 5px rgba(224,64,251,0.3);
}

.expert-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.expert-role {
  font-size: 0.85rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 12px;
}

.expert-desc {
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ========================================
   用户评价
   ======================================== */
.reviews-section {
  background: linear-gradient(135deg, #fdf0ff 0%, #f0f8ff 100%);
}

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

.review-card {
  background: white;
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
}

.review-card::before {
  content: '"';
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 4rem;
  color: rgba(224,64,251,0.1);
  font-family: Georgia, serif;
  line-height: 1;
}

.review-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.1);
}

.review-stars {
  display: flex;
  gap: 3px;
  margin-bottom: 12px;
}

.star {
  color: #fbbf24;
  font-size: 1rem;
}

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

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

.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-neon);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

.review-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-dark);
}

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

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

.faq-item {
  background: white;
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(224,64,251,0.25);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-dark);
  font-family: var(--font-main);
  transition: var(--transition);
}

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

.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--gradient-light);
  border: 1px solid rgba(224,64,251,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
  color: var(--color-primary);
  transition: var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--gradient-neon);
  color: white;
}

.faq-answer {
  display: none;
  padding: 0 24px 20px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
}

.faq-item.open .faq-answer {
  display: block;
}

/* ========================================
   合作伙伴
   ======================================== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 20px;
  margin-bottom: 48px;
}

.partner-logo {
  background: white;
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: var(--transition);
  min-height: 80px;
}

.partner-logo:hover {
  border-color: rgba(224,64,251,0.3);
  box-shadow: 0 4px 20px rgba(224,64,251,0.1);
  transform: translateY(-2px);
}

.partner-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-align: center;
}

/* ========================================
   联系模块
   ======================================== */
.contact-section {
  background: var(--color-dark);
  color: white;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}

.contact-info h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 20px;
  background: var(--gradient-neon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
}

.contact-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  margin-top: 1px;
}

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

.qr-wrap h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: rgba(255,255,255,0.9);
}

.qr-img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  margin: 0 auto;
  border: 2px solid rgba(224,64,251,0.4);
}

.qr-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  margin-top: 8px;
}

/* ========================================
   页脚
   ======================================== */
.site-footer {
  background: #0f0f1a;
  color: rgba(255,255,255,0.6);
  padding: 40px 0 24px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
  font-size: 1.8rem;
  font-weight: 900;
  background: var(--gradient-neon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.footer-nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}

.footer-nav a:hover {
  color: var(--color-primary);
}

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

.social-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.6);
  transition: var(--transition);
  border: 1px solid rgba(255,255,255,0.1);
}

.social-btn:hover {
  background: var(--gradient-neon);
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 12px rgba(224,64,251,0.4);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8rem;
}

.footer-domain {
  color: var(--color-primary);
  font-weight: 600;
}

/* ========================================
   内页 Banner
   ======================================== */
.page-hero {
  background: linear-gradient(135deg, #f0e6ff 0%, #e6f4ff 100%);
  padding: 60px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('../images/banner_hero.jpg') center/cover;
  opacity: 0.12;
}

.page-hero-content {
  position: relative;
  z-index: 1;
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

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

.breadcrumb-sep {
  color: var(--color-border);
}

.page-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.page-title .brand {
  background: var(--gradient-neon);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

/* ========================================
   更新时间
   ======================================== */
.update-time {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

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

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  
  .site-nav {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    z-index: 999;
  }
  
  .site-nav.open {
    display: flex;
  }
  
  .site-nav a {
    width: 100%;
    padding: 12px 16px;
  }
  
  .hamburger {
    display: flex;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .hero-stats {
    gap: 24px;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-top {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .video-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
}

@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .hero-content { padding: 56px 0; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ========================================
   动画效果
   ======================================== */
@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.neon-glow {
  animation: neon-pulse 3s ease-in-out infinite;
}

@keyframes neon-pulse {
  0%, 100% { box-shadow: 0 0 10px rgba(224,64,251,0.3), 0 0 20px rgba(0,176,255,0.2); }
  50% { box-shadow: 0 0 20px rgba(224,64,251,0.6), 0 0 40px rgba(0,176,255,0.4); }
}

/* 懒加载 */
img[loading="lazy"] {
  transition: opacity 0.3s ease;
}

/* 滚动条美化 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--gradient-neon); border-radius: 3px; }