/* ============================================
   51暗网 - 主样式表
   独特赛博朋克暗色主题
   ============================================ */

/* CSS变量定义 */
:root {
  --primary-green: #00ff88;
  --primary-purple: #8a2be2;
  --primary-cyan: #00bfff;
  --primary-red: #ff0064;
  --gold: #ffc800;
  --bg-dark: #0a0520;
  --bg-darker: #050310;
  --bg-card: #12082a;
  --bg-card-hover: #1a0e38;
  --text-main: #e0e0e8;
  --text-muted: #8888a0;
  --text-bright: #ffffff;
  --border-glow: rgba(0, 255, 136, 0.3);
  --shadow-glow: 0 0 20px rgba(0, 255, 136, 0.15);
  --font-main: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-heading: 'Noto Sans SC', 'PingFang SC', sans-serif;
  --max-width: 1200px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.8;
  overflow-x: hidden;
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--primary-cyan);
}

/* ============================================
   顶部导航
   ============================================ */
.site-header {
  background: linear-gradient(180deg, var(--bg-darker) 0%, rgba(5, 3, 16, 0.95) 100%);
  border-bottom: 1px solid var(--border-glow);
  padding: 0;
  position: relative;
  z-index: 100;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-logo img {
  height: 40px;
  width: auto;
}

.site-logo .logo-text {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-green);
  letter-spacing: 1px;
}

/* 桌面端导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0;
}

.main-nav a {
  padding: 10px 16px;
  font-size: 0.95rem;
  color: var(--text-main);
  position: relative;
  white-space: nowrap;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-green);
  transition: all var(--transition);
  transform: translateX(-50%);
}

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

.main-nav a:hover::after {
  width: 60%;
}

.main-nav a.active {
  color: var(--primary-green);
}

.main-nav a.active::after {
  width: 60%;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: 2px solid var(--primary-green);
  color: var(--primary-green);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1.4rem;
  line-height: 1;
}

/* CTA按钮 */
.cta-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-green), #00cc6a);
  color: var(--bg-darker) !important;
  padding: 10px 24px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 255, 136, 0.4);
  color: var(--bg-darker) !important;
}

.cta-btn-outline {
  background: transparent;
  border: 2px solid var(--primary-green);
  color: var(--primary-green) !important;
}

.cta-btn-outline:hover {
  background: var(--primary-green);
  color: var(--bg-darker) !important;
}

.cta-btn-purple {
  background: linear-gradient(135deg, var(--primary-purple), #6a1bb5);
  color: #fff !important;
}

.cta-btn-purple:hover {
  box-shadow: 0 6px 25px rgba(138, 43, 226, 0.4);
}

/* ============================================
   Hero区域
   ============================================ */
.hero-section {
  position: relative;
  min-height: 500px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

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

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.6;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 5, 32, 0.85) 0%, rgba(30, 0, 60, 0.7) 100%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 60px 20px;
}

.hero-content h1 {
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--text-bright);
  margin-bottom: 16px;
  line-height: 1.3;
}

.hero-content h1 .highlight {
  color: var(--primary-green);
  text-shadow: 0 0 30px rgba(0, 255, 136, 0.5);
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 30px;
}

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

/* ============================================
   面包屑导航
   ============================================ */
.breadcrumb-nav {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 20px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.breadcrumb-nav a {
  color: var(--text-muted);
}

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

.breadcrumb-nav .sep {
  margin: 0 8px;
  color: var(--text-muted);
  opacity: 0.5;
}

/* ============================================
   通用区块
   ============================================ */
.section {
  padding: 60px 20px;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 12px;
  position: relative;
  padding-left: 20px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: var(--primary-green);
  border-radius: 2px;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 36px;
}

/* 交替背景 */
.section-alt {
  background: var(--bg-darker);
}

.section-gradient {
  background: linear-gradient(180deg, var(--bg-dark) 0%, var(--bg-darker) 100%);
}

/* ============================================
   卡片网格
   ============================================ */
.card-grid {
  display: grid;
  gap: 24px;
}

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

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}

.card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}

.card-body {
  padding: 20px;
}

.card-body h3 {
  font-size: 1.1rem;
  color: var(--text-bright);
  margin-bottom: 8px;
}

.card-body p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.card-tag {
  display: inline-block;
  background: rgba(0, 255, 136, 0.1);
  color: var(--primary-green);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  margin-top: 10px;
}

/* ============================================
   视频播放模块
   ============================================ */
.video-player-wrap {
  position: relative;
  background: #000;
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 16/9;
  cursor: pointer;
}

.video-player-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity var(--transition);
}

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 70px;
  height: 70px;
  background: rgba(0, 255, 136, 0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.video-play-btn::after {
  content: '';
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 14px 0 14px 24px;
  border-color: transparent transparent transparent var(--bg-darker);
  margin-left: 4px;
}

.video-player-wrap:hover .video-play-btn {
  transform: translate(-50%, -50%) scale(1.1);
  box-shadow: 0 0 40px rgba(0, 255, 136, 0.6);
}

/* ============================================
   新闻模块
   ============================================ */
.news-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.news-item:last-child {
  border-bottom: none;
}

.news-thumb {
  flex-shrink: 0;
  width: 180px;
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.news-thumb img {
  width: 100%;
  height: 120px;
  object-fit: cover;
}

.news-body h3 {
  font-size: 1.05rem;
  color: var(--text-bright);
  margin-bottom: 6px;
}

.news-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.news-date {
  font-size: 0.78rem;
  color: var(--primary-green);
  margin-top: 6px;
}

/* ============================================
   上传模块
   ============================================ */
.upload-zone {
  border: 2px dashed rgba(0, 255, 136, 0.4);
  border-radius: var(--radius-lg);
  padding: 50px 30px;
  text-align: center;
  background: rgba(0, 255, 136, 0.03);
  transition: all var(--transition);
  cursor: pointer;
}

.upload-zone:hover {
  border-color: var(--primary-green);
  background: rgba(0, 255, 136, 0.06);
}

.upload-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  background: rgba(0, 255, 136, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--primary-green);
}

/* ============================================
   VIP会员模块
   ============================================ */
.vip-plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.vip-card {
  background: linear-gradient(180deg, var(--bg-card) 0%, rgba(18, 8, 42, 0.9) 100%);
  border: 1px solid rgba(255, 200, 0, 0.15);
  border-radius: var(--radius-md);
  padding: 30px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
}

.vip-card:hover {
  border-color: var(--gold);
  transform: translateY(-4px);
  box-shadow: 0 0 30px rgba(255, 200, 0, 0.15);
}

.vip-card.featured {
  border-color: var(--gold);
  background: linear-gradient(180deg, rgba(40, 25, 5, 0.9) 0%, rgba(18, 8, 42, 0.95) 100%);
}

.vip-card.featured::before {
  content: '推荐';
  position: absolute;
  top: 12px;
  right: -28px;
  background: var(--gold);
  color: var(--bg-darker);
  padding: 4px 36px;
  font-size: 0.75rem;
  font-weight: 700;
  transform: rotate(45deg);
}

.vip-price {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--gold);
  margin: 16px 0;
}

.vip-price .currency {
  font-size: 1rem;
  vertical-align: top;
}

.vip-features {
  list-style: none;
  text-align: left;
  margin: 20px 0;
}

.vip-features li {
  padding: 8px 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.vip-features li::before {
  content: '✓';
  color: var(--primary-green);
  margin-right: 8px;
  font-weight: 700;
}

/* ============================================
   FAQ手风琴
   ============================================ */
.faq-item {
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-card);
}

.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--text-bright);
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(0, 255, 136, 0.05);
}

.faq-question .faq-toggle {
  font-size: 1.4rem;
  color: var(--primary-green);
  transition: transform var(--transition);
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-muted);
  line-height: 1.8;
  font-size: 0.92rem;
}

/* ============================================
   评论/评价
   ============================================ */
.review-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 255, 136, 0.08);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: all var(--transition);
}

.review-card:hover {
  border-color: var(--border-glow);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-green), var(--primary-cyan));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--bg-darker);
  font-size: 1.1rem;
}

.review-meta .review-name {
  font-weight: 600;
  color: var(--text-bright);
  font-size: 0.95rem;
}

.review-meta .review-location {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.review-stars {
  color: var(--gold);
  font-size: 0.9rem;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.review-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 10px;
  opacity: 0.6;
}

/* ============================================
   招聘模块
   ============================================ */
.recruit-section {
  position: relative;
  overflow: hidden;
}

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

.recruit-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

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

.recruit-benefits {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.benefit-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.benefit-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: rgba(0, 191, 255, 0.1);
  border: 1px solid rgba(0, 191, 255, 0.3);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary-cyan);
}

.benefit-text h4 {
  font-size: 0.95rem;
  color: var(--text-bright);
  margin-bottom: 4px;
}

.benefit-text p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ============================================
   支付方式
   ============================================ */
.payment-section {
  text-align: center;
}

.payment-icons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.payment-icon-item {
  background: var(--bg-card);
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-md);
  padding: 16px 28px;
  text-align: center;
  min-width: 120px;
  transition: all var(--transition);
}

.payment-icon-item:hover {
  border-color: var(--primary-green);
}

.payment-icon-item .icon-label {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 6px;
}

.payment-icon-item .icon-symbol {
  font-size: 1.8rem;
  color: var(--primary-green);
}

.pix-highlight {
  border-color: var(--primary-green) !important;
  background: rgba(0, 255, 136, 0.05);
}

/* ============================================
   关于我们
   ============================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-text h3 {
  font-size: 1.3rem;
  color: var(--text-bright);
  margin-bottom: 16px;
}

.about-text p {
  margin-bottom: 14px;
  line-height: 1.9;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.stat-box {
  background: var(--bg-card);
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--primary-green);
}

.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================
   客户支持
   ============================================ */
.support-channels {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.support-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}

.support-card:hover {
  border-color: var(--primary-green);
  transform: translateY(-3px);
}

.support-icon {
  font-size: 2rem;
  margin-bottom: 12px;
}

.support-card h4 {
  font-size: 1rem;
  color: var(--text-bright);
  margin-bottom: 6px;
}

.support-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
  background: var(--bg-darker);
  border-top: 1px solid var(--border-glow);
  padding: 50px 20px 20px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

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

.footer-col h4 {
  font-size: 1rem;
  color: var(--primary-green);
  margin-bottom: 16px;
  font-weight: 600;
}

.footer-col p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 10px;
}

.footer-col ul {
  list-style: none;
}

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

.footer-col ul li a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-col ul li a:hover {
  color: var(--primary-green);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

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

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

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 255, 136, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-green);
  font-size: 0.85rem;
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--primary-green);
  color: var(--bg-darker);
}

/* ============================================
   内页样式
   ============================================ */
.page-hero {
  position: relative;
  min-height: 280px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

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

.page-hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.4;
}

.page-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 5, 32, 0.8) 0%, rgba(10, 5, 32, 0.95) 100%);
}

.page-hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 50px 20px;
}

.page-hero-content h1 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text-bright);
  margin-bottom: 10px;
}

.page-hero-content p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* 内容文章区 */
.article-content {
  max-width: 900px;
  margin: 0 auto;
}

.article-content h2 {
  font-size: 1.5rem;
  color: var(--text-bright);
  margin: 36px 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--primary-green);
}

.article-content h3 {
  font-size: 1.2rem;
  color: var(--text-bright);
  margin: 24px 0 12px;
}

.article-content p {
  margin-bottom: 16px;
  line-height: 1.9;
}

.article-content ul, .article-content ol {
  margin: 12px 0 20px 24px;
}

.article-content li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.article-img {
  margin: 24px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid rgba(0, 255, 136, 0.1);
}

.article-img img {
  width: 100%;
}

.article-img figcaption {
  padding: 10px 16px;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: var(--bg-card);
}

/* ============================================
   APP下载页
   ============================================ */
.app-hero {
  text-align: center;
  padding: 80px 20px;
}

.app-mockup {
  max-width: 600px;
  margin: 30px auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.app-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.app-feature-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 255, 136, 0.1);
  border-radius: var(--radius-md);
  padding: 30px 20px;
  text-align: center;
  transition: all var(--transition);
}

.app-feature-card:hover {
  border-color: var(--primary-green);
  transform: translateY(-3px);
}

.app-feature-icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}

.download-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 30px;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 992px) {
  .card-grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .card-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
  .vip-plans {
    grid-template-columns: repeat(2, 1fr);
  }
  .support-channels {
    grid-template-columns: repeat(2, 1fr);
  }
  .app-features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .recruit-benefits {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-darker);
    flex-direction: column;
    border-top: 1px solid var(--border-glow);
    padding: 10px 0;
    z-index: 999;
  }

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

  .main-nav a {
    padding: 12px 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  }

  .mobile-menu-btn {
    display: block;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .card-grid-2,
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }

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

  .vip-plans {
    grid-template-columns: 1fr;
  }

  .support-channels {
    grid-template-columns: 1fr;
  }

  .app-features-grid {
    grid-template-columns: 1fr;
  }

  .news-item {
    flex-direction: column;
  }

  .news-thumb {
    width: 100%;
  }

  .news-thumb img {
    height: 180px;
  }

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

  .section-title {
    font-size: 1.5rem;
  }

  .page-hero-content h1 {
    font-size: 1.8rem;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .cta-btn {
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .hero-content h1 {
    font-size: 1.7rem;
  }

  .section {
    padding: 40px 16px;
  }

  .header-inner {
    padding: 10px 16px;
  }

  .payment-icons {
    flex-direction: column;
    align-items: center;
  }

  .download-btns {
    flex-direction: column;
  }
}

/* ============================================
   动画效果
   ============================================ */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.2);
  }
  50% {
    box-shadow: 0 0 25px rgba(0, 255, 136, 0.4);
  }
}

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

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

/* 滚动显示动画 */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================
   工具类
   ============================================ */
.text-center { text-align: center; }
.text-green { color: var(--primary-green); }
.text-gold { color: var(--gold); }
.text-cyan { color: var(--primary-cyan); }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }