/* =========================================================
   TK 跨境通 - TikTok 跨境运营服务官网
   配色：深海墨蓝底 + 电光薄荷绿主色 + 琥珀橙强调色
   ========================================================= */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* 主色 - 电光薄荷绿 */
  --primary: #10B981;
  --primary-light: #34D399;
  --primary-dark: #059669;
  --primary-glow: rgba(16, 185, 129, 0.3);

  /* 强调色 - 琥珀橙 */
  --accent: #F59E0B;
  --accent-light: #FBBF24;
  --accent-dark: #D97706;
  --accent-glow: rgba(245, 158, 11, 0.3);

  /* 辅助色 - 天蓝 */
  --secondary: #38BDF8;
  --secondary-light: #7DD3FC;
  --secondary-glow: rgba(56, 189, 248, 0.25);

  /* 背景 - 深海墨蓝系列 */
  --bg-deep: #050D14;
  --bg-primary: #0B1220;
  --bg-secondary: #111A2E;
  --bg-card: rgba(23, 34, 58, 0.7);
  --bg-card-hover: rgba(30, 45, 75, 0.85);

  /* 文字 */
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-dark: #0F172A;

  /* 边框 */
  --border-subtle: rgba(148, 163, 184, 0.1);
  --border-light: rgba(148, 163, 184, 0.15);
  --border-primary: rgba(16, 185, 129, 0.3);

  /* 状态色 */
  --success: #10B981;
  --warning: #F59E0B;
  --danger: #EF4444;

  /* 字体 */
  --font-sans: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", sans-serif;
  --font-display: "Space Grotesk", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", monospace;

  /* 其他 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px var(--primary-glow);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

img, svg {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(11, 18, 32, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
}

.logo-mark {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 700;
  color: white;
  letter-spacing: -0.5px;
}

.logo-text {
  font-size: 18px;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}

.nav-link.nav-cta {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  font-weight: 500;
  padding: 8px 20px;
  margin-left: 8px;
}

.nav-link.nav-cta:hover {
  background: linear-gradient(135deg, var(--primary-light), var(--primary));
  box-shadow: 0 4px 20px var(--primary-glow);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Hero 区 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  overflow: hidden;
}

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

#networkCanvas {
  width: 100%;
  height: 100%;
  display: block;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, var(--primary-glow) 0%, transparent 60%);
  opacity: 0.4;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 20px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--border-primary);
  border-radius: 100px;
  font-size: 14px;
  color: var(--primary-light);
  margin-bottom: 28px;
  font-weight: 500;
}

.dot-pulse {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  position: relative;
}

.dot-pulse::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.4;
  animation: pulse 2s ease-out infinite;
}

@keyframes pulse {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(2); opacity: 0; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(36px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 24px;
  letter-spacing: -1px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary) 50%, var(--primary-light) 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradientShift 4s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-subtitle {
  font-size: clamp(16px, 2vw, 18px);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-bottom: 64px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 16px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  box-shadow: 0 4px 24px rgba(16, 185, 129, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(16, 185, 129, 0.4);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--text-secondary);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: rgba(16, 185, 129, 0.05);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 13px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
}

.btn-sm:hover {
  border-color: var(--primary);
  color: var(--primary-light);
}

.btn-primary-sm {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border: none;
}

.btn-primary-sm:hover {
  box-shadow: 0 4px 16px var(--primary-glow);
  color: white;
}

.btn-full {
  width: 100%;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 48px;
}

.stat-item {
  text-align: center;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border-light);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 12px;
  z-index: 1;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, transparent, var(--text-muted));
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 50%;
  background: var(--primary);
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { transform: translateY(-100%); }
  100% { transform: translateY(200%); }
}

/* ---------- 通用 Section ---------- */
.section {
  padding: 100px 0;
  position: relative;
}

.section-alt {
  background: var(--bg-secondary);
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 64px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--primary);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-eyebrow.light {
  color: var(--primary-light);
}

.eyebrow-line {
  width: 32px;
  height: 1px;
  background: var(--primary);
}

.section-eyebrow.light .eyebrow-line {
  background: var(--primary-light);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-title.light {
  color: white;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ---------- 跨境网络搭建 ---------- */
.network-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.network-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.network-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.network-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-primary);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-lg);
}

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

.network-card.featured {
  border-color: var(--primary);
  box-shadow: 0 0 40px rgba(16, 185, 129, 0.1);
}

.featured-badge {
  position: absolute;
  top: 16px;
  right: -28px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 32px;
  transform: rotate(45deg);
  letter-spacing: 1px;
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-md);
  color: var(--primary);
  margin-bottom: 24px;
}

.card-icon svg {
  width: 28px;
  height: 28px;
}

.node-card .card-icon {
  background: rgba(16, 185, 129, 0.1);
  color: var(--primary);
}

.line-card .card-icon {
  background: rgba(56, 189, 248, 0.1);
  color: var(--secondary);
}

.ip-card .card-icon {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent);
}

.network-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
}

.network-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.card-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.card-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

.card-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}

.line-card .card-list li::before {
  background: var(--secondary);
}

.ip-card .card-list li::before {
  background: var(--accent);
}

.card-cta {
  margin-top: 24px;
  align-self: flex-start;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  width: 100%;
  justify-content: space-between;
  padding: 14px 18px;
}

.network-card:hover .card-cta {
  border-top-color: var(--border-primary);
}

.network-card.featured .card-cta {
  border-top-color: rgba(16, 185, 129, 0.2);
  color: white;
  border: none;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  width: auto;
  align-self: flex-start;
  padding: 10px 20px;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.network-card.featured .card-cta:hover {
  box-shadow: 0 6px 24px var(--primary-glow);
}

.card-price {
  margin-top: auto;
  padding-top: 20px;
  margin-bottom: 16px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.card-price-label {
  font-size: 13px;
  color: var(--text-muted);
}

.card-price-value {
  font-family: var(--font-display);
  font-size: 16px;
  color: var(--text-secondary);
  font-weight: 500;
}

.card-price-value em {
  font-style: normal;
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.network-card.featured .card-price {
  border-top-color: rgba(16, 185, 129, 0.2);
}

/* ---------- 环境检测 ---------- */
.detection-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: center;
}

.detection-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.detection-ring {
  position: relative;
  width: 280px;
  height: 280px;
}

.ring-svg {
  width: 100%;
  height: 100%;
  transform: rotate(0deg);
  filter: drop-shadow(0 0 20px var(--primary-glow));
}

.ring-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.ring-score {
  font-family: var(--font-display);
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ring-score span {
  font-size: 24px;
  -webkit-text-fill-color: var(--text-muted);
  margin-left: 4px;
}

.ring-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.detection-items-vertical {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 100%;
  max-width: 240px;
}

.det-item-mini {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-secondary);
}

.det-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.det-dot.good {
  background: var(--success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.5);
}

.det-dot.warn {
  background: var(--warning);
  box-shadow: 0 0 8px rgba(245, 158, 11, 0.5);
}

.detection-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.detection-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.detection-card:hover {
  border-color: var(--border-primary);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
}

.det-main {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.det-icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

.det-icon svg {
  width: 24px;
  height: 24px;
}

.det-icon-ip {
  background: rgba(16, 185, 129, 0.1);
  color: var(--primary);
}

.det-icon-env {
  background: rgba(56, 189, 248, 0.1);
  color: var(--secondary);
}

.det-icon-device {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent);
}

.det-icon-leak {
  background: rgba(236, 72, 153, 0.1);
  color: #EC4899;
}

.det-content h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.det-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 12px;
}

.det-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.det-tags span {
  padding: 4px 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  font-size: 12px;
  color: var(--text-muted);
}

.det-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  background: rgba(16, 185, 129, 0.08);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-md);
  color: var(--primary-light);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition);
  margin-top: auto;
  position: relative;
  z-index: 1;
}

.det-btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition);
}

.det-btn:hover {
  background: var(--primary);
  color: var(--bg-primary);
  border-color: var(--primary);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.det-btn:hover svg {
  transform: translateX(2px);
}

/* ---------- 账号出售 ---------- */

/* ---------- 账号出售 ---------- */
.account-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 10px 24px;
  font-size: 14px;
  color: var(--text-secondary);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 100px;
  transition: all var(--transition);
}

.tab-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-light);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border-color: transparent;
  box-shadow: 0 4px 16px var(--primary-glow);
}

.account-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.account-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

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

.account-card.featured-card {
  border-color: var(--primary);
  box-shadow: 0 0 40px rgba(16, 185, 129, 0.1);
}

.account-card.hidden {
  display: none;
}

.acc-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  padding: 4px 12px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 100px;
  letter-spacing: 0.5px;
}

.acc-badge-new {
  background: rgba(56, 189, 248, 0.15);
  color: var(--secondary-light);
}

.acc-badge-old {
  background: rgba(168, 85, 247, 0.15);
  color: #C084FC;
}

.acc-badge-verified {
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary-light);
}

.acc-badge-fans {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
}

.acc-header {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-bottom: 20px;
}

.acc-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.acc-avatar svg {
  width: 24px;
  height: 24px;
}

.acc-avatar-new {
  background: rgba(56, 189, 248, 0.15);
  color: var(--secondary-light);
}

.acc-avatar-old {
  background: rgba(168, 85, 247, 0.15);
  color: #C084FC;
}

.acc-avatar-verified {
  background: rgba(16, 185, 129, 0.15);
  color: var(--primary-light);
}

.acc-avatar-fans {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-light);
}

.acc-info h3 {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.acc-region {
  font-size: 13px;
  color: var(--text-muted);
}

.acc-features {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  flex: 1;
}

.acc-features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
  color: var(--text-secondary);
}

.check-icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
  background: var(--primary);
  -webkit-mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M22 4L12 14.01l-3-3'/%3E%3C/svg%3E") center / contain no-repeat;
          mask: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M22 4L12 14.01l-3-3'/%3E%3C/svg%3E") center / contain no-repeat;
}

.acc-footer {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
}

.acc-price {
  display: flex;
  flex-direction: column;
}

.price-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 4px;
}

.price-value {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--primary-light);
}

.price-value em {
  font-style: normal;
  font-size: 24px;
}

.account-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
  padding: 16px 24px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-md);
  font-size: 14px;
  color: var(--accent-light);
}

/* ---------- 粉丝增长 ---------- */
.fans-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}

.fans-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

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

.fans-card.fans-featured {
  border-color: var(--primary);
  background: linear-gradient(180deg, rgba(16, 185, 129, 0.08) 0%, var(--bg-card) 40%);
  box-shadow: 0 0 60px rgba(16, 185, 129, 0.15);
  transform: scale(1.02);
}

.fans-card.fans-featured:hover {
  transform: scale(1.02) translateY(-4px);
}

.fans-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  font-size: 12px;
  font-weight: 600;
  border-radius: 100px;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.fans-tier {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.fans-name {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.fans-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.fans-unit {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-light), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.fans-unit em {
  font-style: normal;
}

.fans-per {
  font-size: 14px;
  color: var(--text-muted);
}

.fans-features {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 28px;
  flex: 1;
}

.fans-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-secondary);
}

.feature-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon.ok {
  background: rgba(16, 185, 129, 0.15);
}

.feature-icon.ok::after {
  content: "";
  width: 10px;
  height: 6px;
  border-left: 2px solid var(--primary);
  border-bottom: 2px solid var(--primary);
  transform: rotate(-45deg) translate(1px, -1px);
}

.feature-icon.no {
  background: rgba(100, 116, 139, 0.15);
  position: relative;
}

.feature-icon.no::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 1px;
}

.fans-features-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
}

.feature-bar-item {
  display: flex;
  align-items: center;
  gap: 16px;
}

.fbar-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-md);
  color: var(--primary);
}

.fbar-icon svg {
  width: 22px;
  height: 22px;
}

.fbar-text h4 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.fbar-text p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- FAQ ---------- */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item:hover {
  border-color: var(--border-light);
}

.faq-item.active {
  border-color: var(--border-primary);
  box-shadow: 0 4px 24px rgba(16, 185, 129, 0.08);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  text-align: left;
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.02);
}

.faq-q-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 14px;
  border-radius: 50%;
}

.faq-q-text {
  flex: 1;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.faq-icon {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px 0 68px;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 24px 68px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 12px;
}

.faq-answer ol {
  margin-bottom: 12px;
}

.faq-answer ol li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  counter-increment: faq-counter;
}

.faq-answer ol {
  counter-reset: faq-counter;
}

.faq-answer ol li::before {
  content: counter(faq-counter) ".";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: 600;
}

.faq-answer strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ---------- 联系我们 ---------- */
.contact-section {
  background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-deep) 100%);
  padding: 100px 0;
}

.contact-box {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 64px;
  align-items: center;
  padding: 64px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.contact-box::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

.contact-left .section-header {
  text-align: left;
  margin: 0 0 32px;
}

.contact-left .section-title {
  text-align: left;
  margin-bottom: 16px;
}

.contact-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
}

.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.method-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.method-item:hover {
  border-color: var(--border-primary);
  background: rgba(16, 185, 129, 0.05);
  transform: translateX(4px);
}

.method-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(16, 185, 129, 0.1);
  border-radius: var(--radius-sm);
  color: var(--primary);
}

.method-icon svg {
  width: 20px;
  height: 20px;
}

.method-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.method-label {
  font-size: 12px;
  color: var(--text-muted);
}

.method-value {
  font-size: 15px;
  color: var(--text-primary);
}

.method-value strong {
  color: var(--primary-light);
  font-weight: 600;
  font-family: var(--font-mono);
}

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

.qr-card {
  width: 260px;
  padding: 24px;
  background: white;
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.qr-placeholder {
  width: 100%;
  aspect-ratio: 1;
  background: #fff;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0B1220;
  padding: 16px;
  margin-bottom: 16px;
}

.qr-placeholder svg {
  width: 100%;
  height: 100%;
}

.qr-label {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 4px;
}

.qr-hint {
  font-size: 12px;
  color: #64748B;
}

/* ---------- Footer ---------- */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: 64px;
  margin-bottom: 48px;
}

.footer-brand {
  max-width: 360px;
}

.footer-brand .nav-logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col li {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

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

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

.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

/* ---------- 悬浮联系按钮 ---------- */
.floating-contact {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 999;
}

.float-btn {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 50%;
  color: white;
  box-shadow: 0 8px 32px var(--primary-glow);
  transition: all var(--transition);
}

.float-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 12px 40px var(--primary-glow);
}

.float-btn svg {
  width: 24px;
  height: 24px;
}

/* ---------- 滚动揭示动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .network-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .network-card:nth-child(3) {
    grid-column: span 2;
  }

  .detection-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .fans-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .fans-card.fans-featured {
    transform: none;
  }

  .fans-card.fans-featured:hover {
    transform: translateY(-4px);
  }

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

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

  .footer-top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-brand {
    max-width: none;
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    background: rgba(11, 18, 32, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transform: translateY(-120%);
    transition: transform var(--transition);
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .nav-link {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-subtle);
    border-radius: 0;
  }

  .nav-link.nav-cta {
    margin: 12px 0 0;
    text-align: center;
    border-radius: var(--radius-md);
    border-bottom: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 100px 24px 60px;
  }

  .hero-stats {
    gap: 24px;
    flex-wrap: wrap;
  }

  .stat-divider {
    display: none;
  }

  .section {
    padding: 64px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

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

  .network-card:nth-child(3) {
    grid-column: span 1;
  }

  .detection-ring {
    width: 220px;
    height: 220px;
  }

  .ring-score {
    font-size: 48px;
  }

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

  .account-tabs {
    gap: 6px;
  }

  .tab-btn {
    padding: 8px 16px;
    font-size: 13px;
  }

  .fans-features-bar {
    grid-template-columns: 1fr;
    padding: 24px;
  }

  .contact-box {
    padding: 32px 24px;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .floating-contact {
    bottom: 20px;
    right: 20px;
  }

  .float-btn {
    width: 48px;
    height: 48px;
  }

  .hero-scroll {
    display: none;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .nav-container {
    padding: 0 16px;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }

  .section-title {
    font-size: 28px;
  }

  .network-card {
    padding: 28px 24px;
  }

  .fans-card {
    padding: 32px 24px;
  }

  .fans-name {
    font-size: 24px;
  }

  .fans-unit {
    font-size: 32px;
  }

  .faq-question {
    padding: 16px;
    gap: 12px;
  }

  .faq-q-text {
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 16px 0 56px;
  }

  .faq-item.active .faq-answer {
    padding: 0 16px 20px 56px;
  }

  .method-item {
    padding: 14px;
  }

  .qr-card {
    width: 220px;
  }
}

/* ---------- 动画与 Reduced Motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}