/* ==========================================================================
   xsus - 极速网络加速器 & 机场推荐 纯原生极简高转化 CSS
   Zero External Dependencies | 秒开级加载性能 | 现代化玻璃拟态 & 暗黑科技风
   ========================================================================== */

:root {
  --bg-primary: #080b11;
  --bg-secondary: #0f1420;
  --bg-card: rgba(18, 24, 38, 0.75);
  --bg-card-hover: rgba(26, 35, 56, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 242, 254, 0.35);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --text-sub: #64748b;
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-purple: #7928ca;
  --accent-pink: #ff0080;
  --accent-green: #10b981;
  --gradient-primary: linear-gradient(135deg, #00f2fe 0%, #4facfe 100%);
  --gradient-accent: linear-gradient(135deg, #ff0080 0%, #7928ca 100%);
  --gradient-card: linear-gradient(145deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.01) 100%);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: "Fira Code", Consolas, Monaco, "Courier New", Courier, monospace;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 12px 36px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 24px rgba(0, 242, 254, 0.25);
  --transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  --container-max: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: var(--bg-primary);
  color: var(--text-main);
}

body {
  font-family: var(--font-family);
  line-height: 1.6;
  background-color: var(--bg-primary);
  color: var(--text-main);
  overflow-x: hidden;
  position: relative;
  -webkit-font-smoothing: antialiased;
}

/* 背景光晕装饰 */
body::before {
  content: "";
  position: fixed;
  top: -200px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 550px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.12) 0%, rgba(121, 40, 202, 0.08) 50%, transparent 80%);
  filter: blur(80px);
  z-index: -1;
  pointer-events: none;
}

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

img, svg {
  vertical-align: middle;
  max-width: 100%;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* 渐变高亮文本 */
.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.gradient-text-alt {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* ==========================================================================
   导航栏 (Navbar)
   ========================================================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(8, 11, 17, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.navbar.scrolled {
  background: rgba(8, 11, 17, 0.92);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

/* 品牌 Logo */
.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 16px rgba(0, 242, 254, 0.4);
}

.brand-name {
  color: var(--text-main);
}

.brand-tag {
  font-size: 0.65rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0, 242, 254, 0.15);
  color: var(--accent-cyan);
  font-weight: 600;
  margin-left: 2px;
}

/* 导航链接 */
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: var(--gradient-primary);
  transition: width 0.25s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.nav-link.badge-link {
  position: relative;
}

.nav-link.badge-link::before {
  content: "HOT";
  position: absolute;
  top: -8px;
  right: -24px;
  font-size: 0.6rem;
  background: #ff0080;
  color: #fff;
  padding: 1px 5px;
  border-radius: 4px;
  font-weight: 700;
}

/* 导航转化按钮 */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-nav-login {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.03);
}

.btn-nav-login:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.08);
}

.btn-nav-cta {
  background: var(--gradient-primary);
  color: #080b11;
  font-size: 0.9rem;
  font-weight: 700;
  padding: 8px 20px;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 12px rgba(0, 242, 254, 0.35);
}

.btn-nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.55);
}

/* 移动端汉堡按钮 */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  color: var(--text-main);
}

.mobile-toggle svg {
  width: 26px;
  height: 26px;
}

/* ==========================================================================
   首屏横幅区 (Hero Section)
   ========================================================================== */
.hero {
  padding-top: 150px;
  padding-bottom: 90px;
  text-align: center;
  position: relative;
}

.hero-badge-wrap {
  display: inline-block;
  margin-bottom: 24px;
}

.hero-promo-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(255, 0, 128, 0.12);
  border: 1px solid rgba(255, 0, 128, 0.35);
  color: #ff339c;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.3px;
  animation: pulse-glow 2.5s infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(255, 0, 128, 0.2); }
  50% { box-shadow: 0 0 22px rgba(255, 0, 128, 0.45); }
}

.hero-title {
  font-size: 3.4rem;
  font-weight: 850;
  line-height: 1.18;
  letter-spacing: -1px;
  margin-bottom: 22px;
  max-width: 950px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 760px;
  margin: 0 auto 36px auto;
  line-height: 1.7;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-bottom: 48px;
}

.btn-primary-hero {
  background: var(--gradient-primary);
  color: #080b11;
  font-size: 1.1rem;
  font-weight: 750;
  padding: 15px 36px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 6px 24px rgba(0, 242, 254, 0.4);
  transition: var(--transition);
}

.btn-primary-hero:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px rgba(0, 242, 254, 0.6);
}

.btn-secondary-hero {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 15px 32px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-secondary-hero:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* 信任指标栏 (Trust Indicators) */
.hero-trust-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 36px;
  flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--border-color);
  max-width: 860px;
  margin: 0 auto;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.trust-item svg {
  color: var(--accent-green);
}

/* ==========================================================================
   通用区块标题
   ========================================================================== */
.section {
  padding: 90px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px auto;
}

.section-tag {
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  display: inline-block;
}

.section-title {
  font-size: 2.35rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.02rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   核心优势图卡区 (Dynamic Cards Section)
   ========================================================================== */
.cards-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.feature-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0, 242, 254, 0.4), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(0, 242, 254, 0.3);
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-box {
  width: 58px;
  height: 58px;
  border-radius: var(--radius-sm);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--accent-cyan);
}

.feature-icon-box.purple {
  background: rgba(121, 40, 202, 0.12);
  border-color: rgba(121, 40, 202, 0.25);
  color: #c084fc;
}

.feature-icon-box.pink {
  background: rgba(255, 0, 128, 0.12);
  border-color: rgba(255, 0, 128, 0.25);
  color: #ff66b2;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-text {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* 流媒体与 AI 支持大图卡 */
.unlock-media-card {
  background: linear-gradient(135deg, rgba(18, 24, 38, 0.85) 0%, rgba(26, 32, 50, 0.6) 100%);
  border: 1px solid rgba(0, 242, 254, 0.2);
  border-radius: var(--radius-lg);
  padding: 40px;
  margin-top: 16px;
  position: relative;
  overflow: hidden;
}

.unlock-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 30px;
  flex-wrap: wrap;
  gap: 16px;
}

.unlock-title {
  font-size: 1.5rem;
  font-weight: 750;
  margin-bottom: 6px;
}

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

.unlock-badge {
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #34d399;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: var(--radius-full);
}

.unlock-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.unlock-item {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition);
}

.unlock-item:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.unlock-item-icon {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
}

.unlock-item-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
}

.unlock-item-info p {
  font-size: 0.78rem;
  color: var(--accent-green);
}

/* ==========================================================================
   定价卡片区 (Pricing Section)
   ========================================================================== */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  align-items: stretch;
}

.pricing-card {
  background: var(--bg-card);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 38px 30px;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: var(--transition);
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  background: linear-gradient(180deg, rgba(26, 38, 64, 0.9) 0%, rgba(15, 21, 35, 0.95) 100%);
  border: 2px solid var(--accent-cyan);
  box-shadow: 0 0 32px rgba(0, 242, 254, 0.25);
  transform: scale(1.03);
}

.pricing-card.featured:hover {
  transform: scale(1.03) translateY(-6px);
  box-shadow: 0 0 42px rgba(0, 242, 254, 0.4);
}

.pricing-ribbon {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: #080b11;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  padding: 4px 18px;
  border-radius: var(--radius-full);
  box-shadow: 0 4px 12px rgba(0, 242, 254, 0.4);
  text-transform: uppercase;
}

.plan-header {
  margin-bottom: 24px;
}

.plan-name {
  font-size: 1.35rem;
  font-weight: 750;
  margin-bottom: 6px;
}

.plan-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
}

.plan-price-wrap {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
}

.plan-currency {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--accent-cyan);
}

.plan-price {
  font-size: 3rem;
  font-weight: 850;
  line-height: 1;
}

.plan-period {
  color: var(--text-sub);
  font-size: 0.9rem;
}

.plan-traffic-badge {
  display: inline-block;
  background: rgba(0, 242, 254, 0.1);
  color: var(--accent-cyan);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 20px;
}

.plan-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}

.plan-feature-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 14px;
}

.plan-feature-item svg {
  color: var(--accent-green);
  flex-shrink: 0;
}

.btn-pricing-cta {
  width: 100%;
  text-align: center;
  padding: 14px 20px;
  border-radius: var(--radius-full);
  font-weight: 750;
  font-size: 0.98rem;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  display: block;
}

.btn-pricing-cta:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.pricing-card.featured .btn-pricing-cta {
  background: var(--gradient-primary);
  color: #080b11;
  border: none;
  box-shadow: 0 4px 18px rgba(0, 242, 254, 0.4);
}

.pricing-card.featured .btn-pricing-cta:hover {
  box-shadow: 0 6px 26px rgba(0, 242, 254, 0.6);
}

/* ==========================================================================
   深度特性解析区 (Why Choose Section)
   ========================================================================== */
.why-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-bottom: 80px;
}

.why-row.reverse {
  direction: rtl;
}

.why-row.reverse > * {
  direction: ltr;
}

.why-content h3 {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 18px;
}

.why-content p {
  color: var(--text-muted);
  font-size: 1.02rem;
  line-height: 1.7;
  margin-bottom: 24px;
}

.why-feature-list {
  list-style: none;
}

.why-feature-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.96rem;
  margin-bottom: 12px;
  color: var(--text-main);
}

/* 视觉化数据面板 (Row 1 Visual) */
.data-panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-lg);
  position: relative;
}

.data-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.data-status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
  margin-right: 6px;
}

.data-grid-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-bottom: 24px;
}

.data-stat-box {
  background: rgba(255, 255, 255, 0.03);
  border-radius: var(--radius-sm);
  padding: 16px;
  border: 1px solid var(--border-color);
}

.data-stat-label {
  font-size: 0.8rem;
  color: var(--text-sub);
  margin-bottom: 4px;
}

.data-stat-val {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent-cyan);
}

.data-speed-bar-wrap {
  margin-top: 10px;
}

.data-bar-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.data-progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 4px;
  overflow: hidden;
}

.data-progress-fill {
  height: 100%;
  width: 98.6%;
  background: var(--gradient-primary);
  border-radius: 4px;
}

/* 终端代码块 (Row 2 Visual: Strict_No_Logs_Policy.sh) */
.terminal-window {
  background: #090c13;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
  font-family: var(--font-mono);
}

.terminal-header {
  background: #141a27;
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.terminal-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.dot-red { background: #ff5f56; }
.dot-yellow { background: #ffbd2e; }
.dot-green { background: #27c93f; }

.terminal-title {
  color: #8b9bb4;
  font-size: 0.82rem;
  margin-left: 8px;
}

.terminal-body {
  padding: 22px;
  font-size: 0.86rem;
  line-height: 1.8;
  color: #c9d1d9;
}

.term-comment { color: #6e7681; }
.term-cmd { color: #79c0ff; }
.term-keyword { color: #ff7b72; }
.term-success { color: #7ee787; font-weight: 700; }
.term-cursor {
  display: inline-block;
  width: 8px;
  height: 16px;
  background: var(--accent-cyan);
  vertical-align: middle;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ==========================================================================
   底部转化区 (CTA Section)
   ========================================================================== */
.cta-banner {
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.12) 0%, rgba(121, 40, 202, 0.15) 100%);
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: var(--radius-lg);
  padding: 64px 36px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 50px rgba(0, 242, 254, 0.1);
}

.cta-banner::before {
  content: "";
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(circle, rgba(0, 242, 254, 0.25) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
}

.cta-title {
  font-size: 2.5rem;
  font-weight: 850;
  margin-bottom: 16px;
  position: relative;
}

.cta-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 36px auto;
  position: relative;
}

.btn-cta-big {
  background: var(--gradient-primary);
  color: #080b11;
  font-size: 1.18rem;
  font-weight: 800;
  padding: 16px 44px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 30px rgba(0, 242, 254, 0.45);
  position: relative;
  transition: var(--transition);
}

.btn-cta-big:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 38px rgba(0, 242, 254, 0.7);
}

/* ==========================================================================
   用户评价跑马灯区 (Testimonials Marquee Section)
   ========================================================================== */
.marquee-container {
  overflow: hidden;
  position: relative;
  width: 100%;
  padding: 20px 0;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
}

.marquee-track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: marquee 35s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

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

.review-card {
  width: 340px;
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  flex-shrink: 0;
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(0, 242, 254, 0.35);
  background: var(--bg-card-hover);
}

.review-stars {
  color: #fbbf24;
  margin-bottom: 12px;
  font-size: 0.9rem;
  letter-spacing: 2px;
}

.review-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
}

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

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00f2fe, #7928ca);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 750;
  font-size: 0.9rem;
  color: #fff;
}

.review-author-name {
  font-size: 0.92rem;
  font-weight: 700;
}

.review-author-role {
  font-size: 0.78rem;
  color: var(--text-sub);
}

/* ==========================================================================
   常见问题解答区 (FAQ Section)
   ========================================================================== */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: rgba(0, 242, 254, 0.3);
  background: rgba(18, 24, 38, 0.9);
}

.faq-question {
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 650;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
  color: var(--text-main);
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-chevron {
  transition: transform 0.25s ease;
  color: var(--accent-cyan);
  flex-shrink: 0;
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px 22px 24px;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  border-top: 1px solid transparent;
}

.faq-item[open] .faq-answer {
  border-top-color: rgba(255, 255, 255, 0.05);
  padding-top: 14px;
}

/* ==========================================================================
   页脚 (Footer)
   只保留要求的四个链接标题：网站地图, 关于我们, 服务条款, 隐私政策
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--border-color);
  background: #05070b;
  padding: 44px 0 36px 0;
  margin-top: 60px;
}

.footer-nav {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-link {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 6px;
  transition: var(--transition);
}

.footer-link:hover {
  color: var(--accent-cyan);
  background: rgba(255, 255, 255, 0.04);
}

.footer-copy {
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-sub);
}

/* ==========================================================================
   响应式适配 (@media 媒体查询)
   确保移动端完美单栏显示、按键便于手指点击
   ========================================================================== */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.7rem;
  }
  .cards-grid-3, .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-left: auto;
    margin-right: auto;
  }
  .unlock-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .why-row, .why-row.reverse {
    grid-template-columns: 1fr;
    gap: 36px;
    direction: ltr;
  }
  .pricing-card.featured {
    transform: none;
  }
  .pricing-card.featured:hover {
    transform: translateY(-6px);
  }
}

@media (max-width: 768px) {
  .nav-links, .nav-actions {
    display: none;
  }
  .mobile-toggle {
    display: block;
  }
  /* 移动端菜单打开状态 */
  .navbar.menu-open .nav-links {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #080b11;
    border-bottom: 1px solid var(--border-color);
    padding: 24px;
    gap: 18px;
    box-shadow: 0 16px 30px rgba(0, 0, 0, 0.6);
  }
  .navbar.menu-open .nav-actions {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: calc(72px + 230px);
    left: 0;
    width: 100%;
    background: #080b11;
    padding: 0 24px 24px 24px;
    gap: 12px;
  }
  .navbar.menu-open .nav-actions a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }
  .hero {
    padding-top: 110px;
    padding-bottom: 60px;
  }
  .hero-title {
    font-size: 2.1rem;
    line-height: 1.25;
  }
  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: 28px;
  }
  .hero-cta-group {
    flex-direction: column;
    width: 100%;
    gap: 14px;
  }
  .btn-primary-hero, .btn-secondary-hero, .btn-cta-big {
    width: 100%;
    justify-content: center;
    padding: 15px 20px;
  }
  .hero-trust-bar {
    gap: 16px;
  }
  .section {
    padding: 60px 0;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .unlock-grid {
    grid-template-columns: 1fr;
  }
  .footer-nav {
    gap: 20px;
    flex-direction: column;
  }
}