/* ===================================================================
   OKX (欧易) 合作评测与深度新手指南门户样式表
   安全规范 · 极速响应 · 暗黑金融科技风 · 移动端优先适配
   抗 Google 社交工程/飘红 · 深度 E-E-A-T 原创内容排版系统
   =================================================================== */

:root {
  --bg-primary: #07090e;
  --bg-secondary: #0d111a;
  --bg-card: #131824;
  --bg-card-hover: #192030;
  --bg-input: #101420;
  --bg-accent-soft: rgba(0, 214, 50, 0.06);
  --bg-blue-soft: rgba(0, 82, 255, 0.08);
  --bg-amber-soft: rgba(245, 158, 11, 0.08);
  
  --border-color: #1f2637;
  --border-light: #2a3449;
  --border-highlight: #00d632;
  
  --text-primary: #ffffff;
  --text-secondary: #9aa8bd;
  --text-muted: #627187;
  
  --brand-green: #00d632;
  --brand-green-glow: rgba(0, 214, 50, 0.25);
  --brand-blue: #0052ff;
  --brand-gold: #f59e0b;
  --brand-danger: #ef4444;
  --brand-purple: #8b5cf6;
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-max: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 35px -5px var(--brand-green-glow);
}

*, *::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-primary);
  font-family: var(--font-family);
  -webkit-text-size-adjust: 100%;
}

body {
  line-height: 1.65;
  background: radial-gradient(circle at 50% 0%, #101827 0%, var(--bg-primary) 70%);
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
  padding-bottom: 74px; /* Space for mobile sticky footer */
}

@media (min-width: 992px) {
  body {
    padding-bottom: 0;
  }
}

/* 链接与通用重置 */
a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

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

img, svg {
  vertical-align: middle;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===================================================================
   顶部安全与第三方身份透明度横幅 (防 Google 社交工程判定核心机制)
   =================================================================== */
.safety-topbar {
  background: #0d1322;
  border-bottom: 1px solid var(--border-color);
  font-size: 0.83rem;
  color: var(--text-secondary);
  padding: 9px 16px;
  text-align: center;
  position: relative;
  z-index: 101;
}

.safety-topbar .badge-official {
  background: rgba(0, 214, 50, 0.15);
  color: var(--brand-green);
  border: 1px solid rgba(0, 214, 50, 0.35);
  padding: 2px 9px;
  border-radius: var(--radius-full);
  font-weight: 700;
  margin-right: 8px;
  display: inline-block;
  font-size: 0.78rem;
}

.safety-topbar .badge-partner {
  background: rgba(0, 82, 255, 0.15);
  color: #60a5fa;
  border: 1px solid rgba(0, 82, 255, 0.35);
  padding: 2px 9px;
  border-radius: var(--radius-full);
  font-weight: 700;
  margin-right: 8px;
  display: inline-block;
  font-size: 0.78rem;
}

.safety-topbar a {
  color: var(--brand-green);
  text-decoration: underline;
  margin-left: 6px;
  font-weight: 600;
}

/* ===================================================================
   导航栏
   =================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 9, 14, 0.9);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0, 214, 50, 0.3);
}

.brand-logo .brand-text {
  display: flex;
  flex-direction: column;
}

.brand-logo .brand-title {
  color: #fff;
  font-size: 1.15rem;
  line-height: 1.2;
}

.brand-logo .brand-sub {
  font-size: 0.72rem;
  color: var(--brand-green);
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* 桌面端导航链接 (大气呼吸感，间距从拥挤变为充裕) */
.nav-links {
  display: none;
  gap: 32px;
}

@media (min-width: 992px) {
  .nav-links {
    display: flex;
    align-items: center;
  }
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  padding: 8px 0;
  position: relative;
  white-space: nowrap;
}

.nav-links a:hover {
  color: #ffffff;
}

.nav-links a:hover::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--brand-green);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* 导航专属轻盈胶囊邀请码按钮 */
.nav-code-pill {
  background: rgba(0, 214, 50, 0.08);
  border: 1px solid rgba(0, 214, 50, 0.3);
  color: #ffffff;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  display: none;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

@media (min-width: 680px) {
  .nav-code-pill {
    display: inline-flex;
  }
}

.nav-code-pill:hover {
  background: rgba(0, 214, 50, 0.18);
  border-color: var(--brand-green);
  transform: translateY(-1px);
}

.nav-code-pill strong {
  color: var(--brand-green);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.88rem;
  letter-spacing: 0.5px;
}

.nav-code-pill .pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand-green);
  box-shadow: 0 0 6px var(--brand-green);
}

/* 移动端汉堡折叠按钮 */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: #ffffff;
  cursor: pointer;
  transition: var(--transition);
}

@media (min-width: 992px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-menu-btn:hover {
  background: var(--bg-card-hover);
  border-color: var(--brand-green);
}

/* 移动端展开菜单抽屉 */
.mobile-dropdown-menu {
  display: none;
  position: absolute;
  top: 70px;
  left: 0;
  width: 100%;
  background: rgba(11, 15, 23, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  padding: 16px 20px 24px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.7);
  flex-direction: column;
  gap: 4px;
  z-index: 99;
}

.mobile-dropdown-menu.active {
  display: flex;
  animation: slideDown 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

.mobile-nav-link {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 10px 8px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.mobile-nav-link:hover, .mobile-nav-link:active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.04);
  padding-left: 12px;
}

/* ===================================================================
   通用按钮系统
   =================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: var(--transition);
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, #00e035 0%, #00b828 100%);
  color: #07090e;
  box-shadow: 0 4px 18px rgba(0, 214, 50, 0.35);
  font-weight: 700;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #10f045 0%, #00c92c 100%);
  box-shadow: 0 6px 24px rgba(0, 214, 50, 0.5);
  transform: translateY(-2px);
}

.btn-secondary {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: #ffffff;
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--brand-green);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 7px 15px;
  font-size: 0.84rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 15px 32px;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* ===================================================================
   Hero 核心区域
   =================================================================== */
.hero-section {
  padding: 50px 0 65px;
  position: relative;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-layout {
    grid-template-columns: 1.18fr 0.82fr;
    gap: 55px;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(0, 214, 50, 0.1);
  border: 1px solid rgba(0, 214, 50, 0.3);
  border-radius: var(--radius-full);
  color: var(--brand-green);
  font-size: 0.86rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--brand-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--brand-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: 2.3rem;
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 18px;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 3.15rem;
  }
}

.text-gradient {
  background: linear-gradient(135deg, #ffffff 30%, #00d632 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.08rem;
  color: var(--text-secondary);
  line-height: 1.72;
  margin-bottom: 28px;
}

/* 核心邀请码复制卡片 */
.referral-card {
  background: linear-gradient(145deg, #151a26 0%, #10141f 100%);
  border: 1.5px solid rgba(0, 214, 50, 0.38);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.referral-card::before {
  content: "";
  position: absolute;
  top: -50px;
  right: -50px;
  width: 140px;
  height: 140px;
  background: radial-gradient(circle, rgba(0, 214, 50, 0.15) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.ref-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ref-tag {
  background: rgba(245, 158, 11, 0.15);
  color: var(--brand-gold);
  border: 1px solid rgba(245, 158, 11, 0.3);
  font-size: 0.75rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.ref-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 8px 8px 8px 18px;
  margin-bottom: 16px;
}

.ref-code {
  font-size: 1.85rem;
  font-weight: 800;
  letter-spacing: 2.5px;
  color: #ffffff;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

.btn-copy {
  background: var(--brand-green);
  color: #07090e;
  padding: 10px 18px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.btn-copy:hover {
  background: #14ff42;
  transform: scale(1.03);
}

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

.ref-benefits-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 22px;
}

.benefit-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.benefit-item svg {
  color: var(--brand-green);
  flex-shrink: 0;
}

.hero-cta-group {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

@media (min-width: 480px) {
  .hero-cta-group {
    flex-direction: row;
  }
}

.hero-cta-group .btn {
  flex: 1;
}

/* Hero 右侧数据与安全视觉面板 */
.hero-visual {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
  position: relative;
}

.visual-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 22px;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--brand-green);
  font-weight: 600;
}

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

.stat-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
}

.stat-value {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.live-por-card {
  background: var(--bg-blue-soft);
  border: 1px solid rgba(0, 82, 255, 0.28);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.por-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(0, 82, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #3b82f6;
  flex-shrink: 0;
}

.por-info h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 2px;
}

.por-info p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ===================================================================
   板块通用排版与标题
   =================================================================== */
.section {
  padding: 70px 0;
  position: relative;
}

.section-darker {
  background: #090c13;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.section-header {
  text-align: center;
  max-width: 820px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  color: var(--brand-green);
  margin-bottom: 10px;
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
  line-height: 1.32;
}

@media (min-width: 768px) {
  .section-title {
    font-size: 2.4rem;
  }
}

.section-subtitle {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===================================================================
   厚重模块 1：欧易合规牌照与平台深度评测 (Exchange Deep Review)
   =================================================================== */
.review-highlight-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 35px;
}

@media (min-width: 768px) {
  .review-highlight-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  transition: var(--transition);
}

.review-card:hover {
  border-color: var(--border-light);
  transform: translateY(-3px);
}

.review-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.badge-green { background: rgba(0, 214, 50, 0.12); color: var(--brand-green); border: 1px solid rgba(0, 214, 50, 0.25); }
.badge-blue { background: rgba(0, 82, 255, 0.12); color: #60a5fa; border: 1px solid rgba(0, 82, 255, 0.25); }
.badge-purple { background: rgba(139, 92, 246, 0.12); color: #a78bfa; border: 1px solid rgba(139, 92, 246, 0.25); }

.review-card h3 {
  font-size: 1.18rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.review-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* 牌照合规徽章网格 */
.licence-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px;
  box-shadow: var(--shadow-card);
}

.licence-box-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.licence-box-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.licence-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

@media (min-width: 768px) {
  .licence-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.licence-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.licence-flag {
  font-size: 1.5rem;
  margin-bottom: 6px;
}

.licence-name {
  font-weight: 700;
  font-size: 0.92rem;
  color: #fff;
  margin-bottom: 2px;
}

.licence-detail {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ===================================================================
   厚重模块 2：默克尔树 POR 储备金自主验证机制
   =================================================================== */
.por-detail-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: center;
}

@media (min-width: 992px) {
  .por-detail-layout {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.por-metrics-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 24px 0;
}

.por-metric-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: center;
}

.por-metric-coin {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
}

.por-metric-pct {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--brand-green);
  margin: 4px 0;
}

.por-metric-status {
  font-size: 0.74rem;
  color: var(--text-secondary);
}

.por-guide-steps {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.por-guide-step {
  display: flex;
  gap: 14px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.por-step-index {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(0, 214, 50, 0.15);
  color: var(--brand-green);
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.85rem;
}

.por-step-content h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.por-step-content p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* ===================================================================
   厚重模块 3：新手安全防坑实操指南 (Crypto Safety Playbook)
   =================================================================== */
.safety-playbook-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .safety-playbook-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.playbook-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.playbook-card:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
}

.playbook-card.featured {
  border-color: rgba(245, 158, 11, 0.4);
  background: linear-gradient(180deg, #181d2c 0%, var(--bg-card) 100%);
}

.playbook-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

.icon-amber { background: rgba(245, 158, 11, 0.15); color: var(--brand-gold); }
.icon-blue { background: rgba(0, 82, 255, 0.15); color: #60a5fa; }
.icon-green { background: rgba(0, 214, 50, 0.15); color: var(--brand-green); }

.playbook-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.playbook-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 16px;
}

.playbook-checklist {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--border-color);
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.84rem;
  color: var(--text-secondary);
}

.checklist-item svg {
  color: var(--brand-green);
  flex-shrink: 0;
  margin-top: 2px;
}

/* ===================================================================
   厚重模块 4：返佣经济学数学算例 (Rebate Math Breakdown)
   =================================================================== */
.rebate-math-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-card);
}

.math-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 30px;
}

.math-header h3 {
  font-size: 1.45rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.math-header p {
  font-size: 0.92rem;
  color: var(--text-secondary);
}

.math-compare-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 30px;
}

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

.math-box {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
}

.math-box.highlight {
  border-color: rgba(0, 214, 50, 0.4);
  background: linear-gradient(180deg, rgba(0, 214, 50, 0.05) 0%, var(--bg-secondary) 100%);
}

.math-box-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.math-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px dashed var(--border-color);
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.math-row.total {
  border-bottom: none;
  padding-top: 14px;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
}

.savings-highlight {
  color: var(--brand-green);
  font-size: 1.3rem;
  font-weight: 800;
}

/* ===================================================================
   原 4 步极速开户与费率表优化
   =================================================================== */
.steps-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .steps-wrapper {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1100px) {
  .steps-wrapper {
    grid-template-columns: repeat(4, 1fr);
  }
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.step-card:hover {
  border-color: var(--brand-green);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
  transform: translateY(-4px);
}

.step-number {
  position: absolute;
  top: 18px;
  right: 20px;
  font-size: 2.4rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.05);
  font-family: ui-monospace, monospace;
}

.step-badge {
  width: 42px;
  height: 42px;
  background: rgba(0, 214, 50, 0.12);
  color: var(--brand-green);
  border: 1px solid rgba(0, 214, 50, 0.3);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.step-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  flex-grow: 1;
}

.step-tip {
  background: var(--bg-secondary);
  border-left: 3px solid var(--brand-green);
  padding: 8px 12px;
  border-radius: 4px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* 费率对比表格 */
.fee-table-container {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.fee-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
}

.fee-table th, .fee-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--border-color);
}

.fee-table th {
  background: var(--bg-secondary);
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.fee-table th.col-highlight,
.fee-table td.col-highlight {
  background: rgba(0, 214, 50, 0.05);
  border-left: 1px solid rgba(0, 214, 50, 0.2);
  border-right: 1px solid rgba(0, 214, 50, 0.2);
}

.fee-table th.col-highlight {
  color: var(--brand-green);
}

.fee-table td {
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.fee-table td strong {
  color: #fff;
}

.fee-table tr:last-child td {
  border-bottom: none;
}

.tag-save {
  background: rgba(0, 214, 50, 0.15);
  color: var(--brand-green);
  font-size: 0.78rem;
  padding: 3px 8px;
  border-radius: 4px;
  font-weight: 700;
  display: inline-block;
  margin-left: 6px;
}

@media (max-width: 768px) {
  .fee-table-container {
    overflow-x: auto;
  }
  .fee-table th, .fee-table td {
    padding: 14px 16px;
    font-size: 0.85rem;
  }
}

/* ===================================================================
   Web3 与生态优势
   =================================================================== */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 768px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.feature-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  transition: var(--transition);
}

.feature-box:hover {
  border-color: var(--border-light);
  transform: translateY(-4px);
}

.feature-icon-wrapper {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-green);
  margin-bottom: 18px;
}

.feature-box h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.feature-box p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================================================
   APP 客户端下载
   =================================================================== */
.download-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

@media (min-width: 768px) {
  .download-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: var(--transition);
}

.download-card:hover {
  border-color: var(--brand-green);
  transform: translateY(-4px);
}

.download-icon {
  width: 56px;
  height: 56px;
  background: var(--bg-secondary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  margin-bottom: 18px;
}

.download-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.download-card p {
  font-size: 0.86rem;
  color: var(--text-secondary);
  margin-bottom: 22px;
  flex-grow: 1;
}

.download-card .btn {
  width: 100%;
}

/* ===================================================================
   FAQ 深度常见问题 (10+ 项手风琴)
   =================================================================== */
.faq-wrapper {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

.faq-item.active {
  border-color: var(--brand-green);
}

.faq-question {
  width: 100%;
  padding: 19px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 1.02rem;
  font-weight: 700;
  color: #ffffff;
}

.faq-toggle-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 14px;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.94rem;
  line-height: 1.72;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding: 0 24px 22px 24px;
}

.faq-answer code {
  background: var(--bg-secondary);
  color: var(--brand-green);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: monospace;
}

/* ===================================================================
   CTA 转化召唤横幅
   =================================================================== */
.cta-banner {
  background: linear-gradient(135deg, #101625 0%, #0e1a2f 100%);
  border: 1px solid rgba(0, 214, 50, 0.4);
  border-radius: var(--radius-lg);
  padding: 45px 30px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.cta-banner-content {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}

.cta-banner h2 {
  font-size: 2.15rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 14px;
}

.cta-banner p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.cta-banner-buttons {
  display: flex;
  flex-direction: column;
  gap: 14px;
  justify-content: center;
  align-items: center;
}

@media (min-width: 540px) {
  .cta-banner-buttons {
    flex-direction: row;
  }
}

/* ===================================================================
   页脚与严密法律/反诈骗免责声明 (Footer Compliance)
   =================================================================== */
.site-footer {
  background: #06080d;
  border-top: 1px solid var(--border-color);
  padding: 55px 0 32px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

@media (min-width: 768px) {
  .footer-top {
    grid-template-columns: 1.5fr 1fr 1fr;
  }
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a:hover {
  color: var(--brand-green);
}

.footer-disclaimer-box {
  background: #0a0e17;
  border: 1px solid #1a2233;
  border-radius: var(--radius-sm);
  padding: 20px;
  margin: 32px 0;
  font-size: 0.81rem;
  line-height: 1.7;
  color: var(--text-muted);
}

.footer-disclaimer-box strong {
  color: var(--text-secondary);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 20px;
  font-size: 0.82rem;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}

/* ===================================================================
   移动端底部常驻悬浮栏
   =================================================================== */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(13, 17, 26, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-color);
  padding: 10px 16px;
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

@media (min-width: 992px) {
  .mobile-sticky-bar {
    display: none;
  }
}

.mobile-code-info {
  display: flex;
  flex-direction: column;
}

.mobile-code-title {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.mobile-code-val {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  font-family: monospace;
}

.mobile-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ===================================================================
   Toast 弹窗提示
   =================================================================== */
.toast-notice {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: #141b2b;
  border: 1px solid var(--brand-green);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 20px var(--brand-green-glow);
  font-size: 0.92rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 10000;
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s ease;
  pointer-events: none;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast-icon {
  color: var(--brand-green);
}