/* ============================================
   体育下注 官方APP极速下载站 - 全局样式表
   科技玻璃态深色主题 (Glassmorphism Tech)
   ============================================ */

/* ---------- CSS变量 ---------- */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.05);
  --bg-glass-hover: rgba(255, 255, 255, 0.1);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent-blue: #00d4ff;
  --accent-green: #10b981;
  --accent-purple: #8b5cf6;
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 212, 255, 0.3);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.15);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Consolas", monospace;
  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-in-out: cubic-bezier(0.77, 0, 0.175, 1);
  --max-width: 1200px;
}

/* ---------- 重置与基础 ---------- */
*, *::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-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}

a:hover {
  color: #33ddff;
}

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
}

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

/* ---------- 背景装饰 ---------- */
.bg-grid {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  z-index: 0;
}

.bg-glow-top {
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 600px;
  background: radial-gradient(ellipse, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ---------- 导航栏 ---------- */
.navbar {
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 0.75rem 0;
  z-index: 100;
  position: relative;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
}

.navbar-brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.navbar-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  color: var(--text-primary);
  font-size: 1.3rem;
  cursor: pointer;
  transition: background 0.2s;
}

.navbar-toggle:hover {
  background: var(--bg-glass-hover);
}

.navbar-menu {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.navbar-menu a {
  color: var(--text-secondary);
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  transition: all 0.2s var(--ease-out);
  white-space: nowrap;
}

.navbar-menu a:hover,
.navbar-menu a.active {
  color: var(--accent-blue);
  background: var(--bg-glass);
}

@media (max-width: 768px) {
  .navbar-toggle {
    display: block;
  }
  .navbar-menu {
    display: none;
    width: 100%;
    flex-direction: column;
    padding-top: 0.75rem;
    margin-top: 0.75rem;
    border-top: 1px solid var(--border-color);
  }
  .navbar-menu.open {
    display: flex;
  }
  .navbar-menu a {
    width: 100%;
    padding: 0.6rem 0.85rem;
  }
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 1rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

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

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

.breadcrumb span {
  margin: 0 0.4rem;
  color: var(--text-muted);
}

/* ---------- 首屏英雄区 ---------- */
.hero {
  position: relative;
  padding: 3rem 0 4rem;
  z-index: 1;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.15;
  z-index: -1;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr 1fr;
  }
}

.hero-left {}

.hero-right {
  display: flex;
  justify-content: center;
}

.hero-right img {
  max-width: 320px;
  width: 100%;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,0.5));
}

.app-info {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.app-icon {
  width: 80px;
  height: 80px;
  border-radius: 18px;
  box-shadow: 0 8px 30px rgba(0,212,255,0.2);
}

.app-title {
  font-size: 2rem;
  line-height: 1.2;
  margin-bottom: 0.25rem;
}

.app-subtitle {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.app-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.stars {
  color: var(--accent-orange);
  font-size: 1.1rem;
}

.rating-text {
  font-weight: 700;
  font-size: 1.1rem;
}

.rating-count, .download-count {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

.app-badges {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.badge {
  display: inline-block;
  padding: 0.3rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  background: var(--bg-glass);
}

.badge.green {
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--accent-green);
  background: rgba(16, 185, 129, 0.08);
}

.badge.blue {
  border-color: rgba(0, 212, 255, 0.3);
  color: var(--accent-blue);
  background: rgba(0, 212, 255, 0.08);
}

/* ---------- 下载按钮 ---------- */
.download-buttons {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.9rem 1.8rem;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  border: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
  text-decoration: none;
  min-width: 160px;
  justify-content: center;
}

.btn-download:hover {
  transform: translateY(-2px);
  color: #fff;
}

.btn-download:active {
  transform: scale(0.97);
}

.btn-ios {
  background: linear-gradient(135deg, #667eea, #764ba2);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

.btn-ios:hover {
  box-shadow: 0 8px 30px rgba(102, 126, 234, 0.5);
}

.btn-android {
  background: linear-gradient(135deg, #10b981, #059669);
  box-shadow: 0 6px 20px rgba(16, 185, 129, 0.3);
}

.btn-android:hover {
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.5);
}

.btn-h5 {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.3);
  width: 100%;
  max-width: 380px;
}

.btn-h5:hover {
  box-shadow: 0 8px 30px rgba(245, 158, 11, 0.5);
}

.btn-download .icon {
  font-size: 1.3rem;
}

.btn-download .label {
  text-align: left;
}

.btn-download .label small {
  display: block;
  font-size: 0.75rem;
  font-weight: 400;
  opacity: 0.8;
}

/* ---------- 安全扫描条 ---------- */
.security-scan {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  margin-top: 1rem;
  max-width: 420px;
}

.scan-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
  font-weight: 600;
  font-size: 0.9rem;
}

.scan-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.scan-bar {
  width: 100%;
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.scan-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-green), var(--accent-blue));
  border-radius: 2px;
  animation: scan-progress 3s ease-in-out infinite;
}

@keyframes scan-progress {
  0% { width: 0%; }
  50% { width: 85%; }
  100% { width: 100%; }
}

.scan-result {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  color: var(--accent-green);
}

/* ---------- 通用区块 ---------- */
.section {
  padding: 3.5rem 0;
  position: relative;
  z-index: 1;
}

.section-title {
  text-align: center;
  font-size: 1.75rem;
  margin-bottom: 0.75rem;
}

.section-desc {
  text-align: center;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 2.5rem;
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- 玻璃卡片 ---------- */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all 0.3s var(--ease-out);
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-3px);
}

/* ---------- 安全认证区 ---------- */
.cert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.cert-card {
  text-align: center;
  padding: 1.5rem 1rem;
}

.cert-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.cert-card h3 {
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.cert-card p {
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ---------- 功能特性区 ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  padding: 2rem 1.5rem;
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
}

.feature-icon.blue { background: rgba(0,212,255,0.1); border-color: rgba(0,212,255,0.2); }
.feature-icon.green { background: rgba(16,185,129,0.1); border-color: rgba(16,185,129,0.2); }
.feature-icon.purple { background: rgba(139,92,246,0.1); border-color: rgba(139,92,246,0.2); }
.feature-icon.orange { background: rgba(245,158,11,0.1); border-color: rgba(245,158,11,0.2); }

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

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

/* ---------- 版本日志 ---------- */
.changelog {
  max-width: 800px;
  margin: 0 auto;
}

.changelog-item {
  padding: 1.5rem;
  margin-bottom: 1rem;
  position: relative;
  border-left: 3px solid var(--accent-blue);
}

.changelog-version {
  display: inline-block;
  background: rgba(0,212,255,0.1);
  color: var(--accent-blue);
  padding: 0.2rem 0.75rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.changelog-date {
  color: var(--text-muted);
  font-size: 0.82rem;
  margin-bottom: 0.75rem;
}

.changelog-item h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.changelog-item p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
}

.changelog-item ul {
  margin-top: 0.5rem;
}

.changelog-item ul li {
  color: var(--text-secondary);
  font-size: 0.88rem;
  padding: 0.2rem 0;
  padding-left: 1.2rem;
  position: relative;
}

.changelog-item ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent-green);
  font-weight: 700;
}

/* ---------- 好评弹幕 ---------- */
.reviews-marquee {
  overflow: hidden;
  padding: 2rem 0;
  position: relative;
}

.reviews-marquee::before,
.reviews-marquee::after {
  content: "";
  position: absolute;
  top: 0;
  width: 100px;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.reviews-marquee::before {
  left: 0;
  background: linear-gradient(90deg, var(--bg-primary), transparent);
}

.reviews-marquee::after {
  right: 0;
  background: linear-gradient(-90deg, var(--bg-primary), transparent);
}

.marquee-track {
  display: flex;
  gap: 1.25rem;
  animation: marquee-scroll 40s linear infinite;
  width: max-content;
}

@keyframes marquee-scroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.review-card {
  flex-shrink: 0;
  width: 280px;
  padding: 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}

.review-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
}

.review-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.review-stars {
  color: var(--accent-orange);
  font-size: 0.8rem;
}

.review-text {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ---------- 页面标题区 ---------- */
.page-header {
  text-align: center;
  padding: 2.5rem 0 1.5rem;
  position: relative;
  z-index: 1;
}

.page-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0,212,255,0.1);
  color: var(--accent-blue);
  padding: 0.35rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 1rem;
  border: 1px solid rgba(0,212,255,0.2);
}

.page-header h1 {
  font-size: 1.8rem;
  margin-bottom: 0.75rem;
}

.page-header p {
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto;
  font-size: 0.95rem;
  line-height: 1.8;
}

/* ---------- 步骤指南 ---------- */
.steps {
  max-width: 800px;
  margin: 0 auto;
}

.step-item {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  padding: 1.5rem;
}

.step-number {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
}

.step-content h3 {
  font-size: 1.05rem;
  margin-bottom: 0.5rem;
}

.step-content p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ---------- APP信息卡 ---------- */
.app-info-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  margin-bottom: 2rem;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.app-info-card img {
  width: 60px;
  height: 60px;
  border-radius: 14px;
}

.app-info-card .info-text {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.app-info-card .info-text strong {
  display: block;
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 0.2rem;
}

.app-info-card .btn-sm {
  margin-left: auto;
  padding: 0.5rem 1.2rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  white-space: nowrap;
}

/* ---------- 版本列表 ---------- */
.version-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
}

.version-table th,
.version-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.9rem;
}

.version-table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.version-table td {
  color: var(--text-secondary);
}

.version-table tr:hover td {
  background: var(--bg-glass);
}

.version-tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  font-size: 0.78rem;
  font-weight: 600;
}

.version-tag.latest {
  background: rgba(16,185,129,0.15);
  color: var(--accent-green);
}

.version-tag.stable {
  background: rgba(0,212,255,0.15);
  color: var(--accent-blue);
}

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

.faq-item {
  margin-bottom: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-sans);
  transition: background 0.2s;
}

.faq-question:hover {
  background: var(--bg-glass);
}

.faq-arrow {
  font-size: 1.2rem;
  transition: transform 0.3s var(--ease-out);
  color: var(--text-muted);
}

.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s var(--ease-out), padding 0.3s var(--ease-out);
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 0 1.25rem 1rem;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* ---------- 线路测速 ---------- */
.route-list {
  max-width: 700px;
  margin: 0 auto;
}

.route-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.route-info {
  display: flex;
  flex-direction: column;
}

.route-name {
  font-weight: 600;
  font-size: 0.95rem;
}

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

.route-status {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-dot.online { background: var(--accent-green); }
.status-dot.slow { background: var(--accent-orange); }

.route-speed {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--accent-green);
}

.btn-enter {
  padding: 0.45rem 1.2rem;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-green), #059669);
  color: #fff;
  font-weight: 600;
  font-size: 0.85rem;
  border: none;
  cursor: pointer;
  transition: all 0.2s var(--ease-out);
}

.btn-enter:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 15px rgba(16,185,129,0.4);
  color: #fff;
}

/* ---------- 下载中心卡片 ---------- */
.download-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.dl-card {
  text-align: center;
  padding: 2rem 1.5rem;
}

.dl-card-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-lg);
  margin: 0 auto 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.dl-card-icon.ios { background: linear-gradient(135deg, #667eea, #764ba2); }
.dl-card-icon.android { background: linear-gradient(135deg, #10b981, #059669); }
.dl-card-icon.h5 { background: linear-gradient(135deg, #f59e0b, #d97706); }

.dl-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

.dl-card .dl-desc {
  color: var(--text-secondary);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.dl-card .dl-meta {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

/* ---------- 内容文章 ---------- */
.article-content {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.article-content h2 {
  font-size: 1.4rem;
  margin: 2rem 0 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-color);
}

.article-content h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.5rem;
}

.article-content p {
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-size: 0.93rem;
  line-height: 1.9;
}

.article-content ul, .article-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
}

.article-content li {
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.8;
  margin-bottom: 0.3rem;
  list-style: disc;
}

.article-content ol li {
  list-style: decimal;
}

/* ---------- 提示框 ---------- */
.tip-box {
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.15);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  margin: 1.5rem 0;
}

.tip-box.warning {
  background: rgba(245,158,11,0.06);
  border-color: rgba(245,158,11,0.15);
}

.tip-box h4 {
  font-size: 0.95rem;
  margin-bottom: 0.4rem;
  color: var(--accent-blue);
}

.tip-box.warning h4 {
  color: var(--accent-orange);
}

.tip-box p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
}

/* ---------- 联系客服CTA ---------- */
.cta-box {
  text-align: center;
  padding: 2.5rem 1.5rem;
  margin: 2rem 0;
}

.cta-box h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
}

.cta-box p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.btn-cta {
  display: inline-block;
  padding: 0.7rem 2rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-green));
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s var(--ease-out);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0,212,255,0.3);
  color: #fff;
}

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 1.5rem;
  position: relative;
  z-index: 1;
}

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

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 0.75rem;
}

.footer-desc {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.7;
}

.footer h4 {
  font-size: 0.95rem;
  margin-bottom: 0.75rem;
  color: #fff;
}

.footer-links a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.88rem;
  padding: 0.25rem 0;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--accent-blue);
}

.footer-contact p {
  color: var(--text-secondary);
  font-size: 0.85rem;
  line-height: 1.8;
}

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-bottom a {
  color: var(--text-muted);
}

.footer-bottom a:hover {
  color: var(--accent-blue);
}

/* ---------- 回到顶部 ---------- */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s var(--ease-out);
  z-index: 99;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--accent-blue);
  color: #fff;
  border-color: var(--accent-blue);
  transform: translateY(-3px);
}

/* ---------- 动画 ---------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 特性图标网格 ---------- */
.icon-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.icon-feature {
  text-align: center;
  padding: 1rem 0.5rem;
}

.icon-feature .if-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.icon-feature span {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ---------- 隐私政策 ---------- */
.privacy-content h2 {
  font-size: 1.3rem;
  margin: 2rem 0 0.75rem;
  color: #fff;
}

.privacy-content p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.9;
  margin-bottom: 1rem;
}

/* ---------- 响应式补丁 ---------- */
@media (max-width: 480px) {
  .app-title { font-size: 1.5rem; }
  .section-title { font-size: 1.4rem; }
  .page-header h1 { font-size: 1.4rem; }
  .download-buttons { flex-direction: column; }
  .btn-download { width: 100%; }
  .app-info { flex-direction: column; text-align: center; }
  .app-icon { width: 64px; height: 64px; }
  .hero-right img { max-width: 240px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* ---------- 打印样式 ---------- */
@media print {
  .navbar, .footer, .back-to-top, .reviews-marquee, .bg-grid, .bg-glow-top { display: none; }
  body { background: #fff; color: #000; }
  .glass-card { border: 1px solid #ccc; background: #fff; }
}