/* ==========================================================================
   BianNeo × OKX 深度评测与官方推广领航站 - 全局样式表
   Design: Editorial Crypto-Research Portal (科技暗黑风 + 深度评测质感)
   ========================================================================== */

:root {
  --bg-dark: #07090e;
  --bg-surface: #0c0f17;
  --bg-card: #111520;
  --bg-card-hover: #161c2b;
  --bg-input: #171d2b;
  --border-subtle: #1c2333;
  --border-highlight: #2a344a;
  --border-glow: rgba(0, 220, 130, 0.3);
  
  --accent: #00dc82;
  --accent-glow: rgba(0, 220, 130, 0.25);
  --accent-hover: #05f895;
  --accent-blue: #3b82f6;
  --accent-blue-bg: rgba(59, 130, 246, 0.1);
  --accent-gold: #f59e0b;
  --accent-gold-bg: rgba(245, 158, 11, 0.1);
  --accent-purple: #8b5cf6;
  --accent-red: #ef4444;
  --accent-red-bg: rgba(239, 68, 68, 0.08);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --text-light: #cbd5e1;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --shadow-card: 0 12px 36px -8px rgba(0, 0, 0, 0.7);
  --shadow-glow: 0 0 30px rgba(0, 220, 130, 0.15);
  --container-max: 1240px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 10% 8%, rgba(0, 220, 130, 0.05) 0%, transparent 45%),
    radial-gradient(circle at 90% 20%, rgba(59, 130, 246, 0.06) 0%, transparent 45%),
    radial-gradient(circle at 50% 65%, rgba(139, 92, 246, 0.04) 0%, transparent 50%);
  background-repeat: no-repeat;
}

a {
  color: inherit;
  text-decoration: none;
  transition: all 0.2s ease;
}

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

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

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

/* ==========================================================================
   Editorial Transparency & Anti-Social Engineering Banners
   ========================================================================== */
.editorial-top-bar {
  background: #090c12;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.8rem;
  padding: 6px 0;
}

.editorial-top-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

.top-bar-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.partner-badge {
  background: rgba(0, 220, 130, 0.15);
  color: var(--accent);
  border: 1px solid rgba(0, 220, 130, 0.35);
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-weight: 700;
  white-space: nowrap;
}

.top-bar-right {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.76rem;
}

.top-bar-right a {
  color: var(--text-dim);
}

.top-bar-right a:hover {
  color: var(--accent);
}

/* ==========================================================================
   Site Header (Spacious, Clean, High-Contrast)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 9, 14, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
  height: 70px;
  display: flex;
  align-items: center;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-portal {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-main-name {
  font-family: var(--font-sans);
  font-size: 1.35rem;
  font-weight: 900;
  letter-spacing: -0.5px;
  color: #ffffff;
  line-height: 1;
}

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

.brand-partner-tag {
  background: rgba(0, 220, 130, 0.12);
  color: var(--accent);
  border: 1px solid rgba(0, 220, 130, 0.3);
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.main-nav {
  display: none;
  align-items: center;
  gap: 32px;
}

@media (min-width: 1024px) {
  .main-nav {
    display: flex;
  }
}

.nav-link {
  color: var(--text-muted);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.05);
}

.header-cta-group {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn-official-outbound {
  background: linear-gradient(135deg, #00dc82 0%, #059669 100%);
  color: #000000;
  font-weight: 800;
  font-size: 0.88rem;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  box-shadow: 0 4px 14px rgba(0, 220, 130, 0.25);
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-official-outbound:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 220, 130, 0.4);
  filter: brightness(1.06);
}

.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--text-main);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
}

@media (min-width: 1024px) {
  .menu-toggle {
    display: none;
  }
}

/* Mobile Nav Drawer */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: 74px;
  left: 0;
  right: 0;
  background: #0c0f17;
  border-bottom: 1px solid var(--border-highlight);
  padding: 20px 24px;
  z-index: 99;
  flex-direction: column;
  gap: 14px;
  max-height: calc(100vh - 74px);
  overflow-y: auto;
}

.mobile-nav-drawer.active {
  display: flex;
}

.mobile-nav-drawer .nav-link {
  font-size: 1rem;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-subtle);
}

/* ==========================================================================
   Editorial Meta Info Bar (E-E-A-T Signal)
   ========================================================================== */
.editorial-meta-panel {
  background: rgba(18, 22, 33, 0.7);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  margin-bottom: 30px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.85rem;
}

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

.author-avatar {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #1e293b, #334155);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  font-size: 0.8rem;
}

.author-details {
  line-height: 1.4;
}

.author-name {
  color: #fff;
  font-weight: 700;
}

.author-title {
  color: var(--text-dim);
  font-size: 0.78rem;
}

.meta-badges-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 600;
}

.status-pill.verified {
  background: rgba(0, 220, 130, 0.12);
  color: var(--accent);
  border: 1px solid rgba(0, 220, 130, 0.3);
}

.status-pill.updated {
  background: rgba(59, 130, 246, 0.12);
  color: #60a5fa;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  padding: 40px 0 60px;
  position: relative;
}

.hero-content {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 220, 130, 0.1);
  border: 1px solid rgba(0, 220, 130, 0.3);
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}

.hero-title {
  font-size: clamp(2.1rem, 4.8vw, 3.4rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.hero-title .highlight-text {
  background: linear-gradient(135deg, #00dc82 0%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.02rem, 2vw, 1.22rem);
  color: var(--text-muted);
  margin-bottom: 34px;
  line-height: 1.7;
}

/* Referral Code Main Card */
.referral-hero-card {
  background: linear-gradient(145deg, #131722 0%, #0d1017 100%);
  border: 1px solid var(--border-highlight);
  box-shadow: var(--shadow-card), var(--shadow-glow);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  max-width: 720px;
  margin: 0 auto 36px;
  position: relative;
  overflow: hidden;
  text-align: left;
}

.referral-hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #00dc82, #3b82f6, #8b5cf6, #00dc82);
}

.ref-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  flex-wrap: wrap;
  gap: 10px;
}

.ref-label-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ref-label-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
}

.ref-tag {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.4);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: var(--radius-full);
}

.ref-discount-badge {
  font-size: 0.88rem;
  color: var(--accent);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 5px;
}

/* Referral Code Box */
.ref-code-box {
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--bg-input);
  border: 2px dashed rgba(0, 220, 130, 0.45);
  border-radius: var(--radius-md);
  padding: 18px 22px;
  margin-bottom: 22px;
}

@media (min-width: 580px) {
  .ref-code-box {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

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

.code-val-wrap {
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.code-value {
  font-family: var(--font-mono);
  font-size: 2.4rem;
  font-weight: 900;
  letter-spacing: 2px;
  color: #ffffff;
  text-shadow: 0 0 14px rgba(0, 220, 130, 0.4);
  line-height: 1;
}

.code-hint {
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 600;
  margin-top: 6px;
}

.btn-copy-code {
  background: var(--accent);
  color: #000;
  font-weight: 800;
  font-size: 1rem;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-copy-code:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 220, 130, 0.4);
}

.btn-copy-code svg {
  width: 18px;
  height: 18px;
}

/* Primary Hero Actions */
.hero-cta-actions {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

@media (min-width: 580px) {
  .hero-cta-actions {
    flex-direction: row;
  }
}

.btn-primary-action {
  flex: 1.2;
  background: linear-gradient(135deg, #00dc82 0%, #059669 100%);
  color: #000000;
  font-weight: 800;
  font-size: 1.08rem;
  padding: 16px 26px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  box-shadow: 0 8px 24px rgba(0, 220, 130, 0.35);
  transition: all 0.25s ease;
}

.btn-primary-action:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(0, 220, 130, 0.5);
  filter: brightness(1.08);
}

.btn-secondary-action {
  flex: 0.9;
  background: var(--bg-card-hover);
  color: var(--text-main);
  border: 1px solid var(--border-highlight);
  font-weight: 600;
  font-size: 0.98rem;
  padding: 16px 22px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all 0.2s ease;
}

.btn-secondary-action:hover {
  background: #1c2230;
  border-color: var(--text-muted);
}

.hero-security-note {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-top: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  line-height: 1.5;
  text-align: center;
}

/* Trust Bar */
.trust-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 36px;
}

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

.trust-item {
  background: rgba(18, 22, 31, 0.6);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  text-align: left;
}

.trust-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.trust-info-title {
  font-size: 0.96rem;
  font-weight: 700;
  color: var(--text-main);
}

.trust-info-desc {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Page Sections Standard Architecture
   ========================================================================== */
.page-section {
  padding: 80px 0;
  border-top: 1px solid var(--border-subtle);
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: inline-block;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
  line-height: 1.3;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ==========================================================================
   Section 1: Background & Compliance Timeline (厚重感：合规牌照与发展史)
   ========================================================================== */
.timeline-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

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

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}

.timeline-year {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--accent);
  margin-bottom: 10px;
}

.timeline-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #fff;
}

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

.regulatory-matrix {
  background: var(--bg-surface);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.regulatory-matrix h4 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.license-tags-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .license-tags-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

.license-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
}

.license-country {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-transform: uppercase;
  font-weight: 700;
}

.license-authority {
  font-size: 0.98rem;
  font-weight: 700;
  color: #fff;
  margin: 4px 0 2px;
}

.license-status {
  font-size: 0.78rem;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   Section 2: PoR (Proof of Reserves) Deep Tech Breakdown
   ========================================================================== */
.por-technical-box {
  background: linear-gradient(145deg, #101524 0%, #0c0f18 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  margin-bottom: 40px;
}

.por-architecture-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: center;
}

@media (min-width: 900px) {
  .por-architecture-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

.por-tech-desc h3 {
  font-size: 1.6rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.por-tech-desc p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

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

.por-step-item {
  display: flex;
  gap: 12px;
}

.por-step-badge {
  background: rgba(0, 220, 130, 0.15);
  color: var(--accent);
  width: 26px;
  height: 26px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.8rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.por-step-text h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
}

.por-step-text p {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 0;
}

.por-metrics-board {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
}

.por-metrics-board h4 {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  text-align: center;
}

.por-token-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.por-token-row:last-child {
  border-bottom: none;
}

.por-token-symbol {
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
}

.por-token-ratio {
  font-family: var(--font-mono);
  font-weight: 900;
  color: var(--accent);
  font-size: 1.1rem;
}

/* ==========================================================================
   Section 3: Comprehensive Fee Calculator & VIP Tables
   ========================================================================== */
.fee-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-card);
  margin-bottom: 30px;
}

.fee-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.fee-table th, .fee-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.fee-table th {
  background: #090c12;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.fee-table td {
  font-size: 0.92rem;
  color: var(--text-main);
}

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

.fee-table tr.highlight-row {
  background: rgba(0, 220, 130, 0.04);
}

.fee-table tr.highlight-row td {
  color: #ffffff;
  font-weight: 600;
}

.discount-strike {
  text-decoration: line-through;
  color: var(--text-dim);
  margin-right: 6px;
  font-size: 0.82rem;
}

.discount-active {
  color: var(--accent);
  font-weight: 800;
}

/* Real-world Savings Case Table */
.savings-case-card {
  background: linear-gradient(135deg, #131926 0%, #0d121c 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin-bottom: 30px;
}

.savings-case-card h4 {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
}

.savings-case-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

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

.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
}

.case-level {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent-blue);
  text-transform: uppercase;
}

.case-volume {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  margin: 4px 0 10px;
}

.case-saved-num {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--accent);
}

.case-saved-lbl {
  font-size: 0.78rem;
  color: var(--text-dim);
}

/* ==========================================================================
   Section 4: Four-Dimensional Product Review
   ========================================================================== */
.product-review-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

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

.product-review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: all 0.25s ease;
}

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

.product-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.product-icon {
  font-size: 2rem;
}

.risk-level-tag {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.risk-level-tag.low {
  background: rgba(0, 220, 130, 0.12);
  color: var(--accent);
  border: 1px solid rgba(0, 220, 130, 0.3);
}

.risk-level-tag.medium {
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent-gold);
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.risk-level-tag.high {
  background: rgba(239, 68, 68, 0.12);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.3);
}

.product-review-card h4 {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.product-review-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.product-features-mini {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-light);
}

.product-features-mini li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.product-features-mini li::before {
  content: "•";
  color: var(--accent);
  font-size: 1.2rem;
}

/* ==========================================================================
   Section 5: Registration & C2C Anti-Freeze Safe Guide (实操避坑)
   ========================================================================== */
.onboarding-deep-container {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 40px;
}

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

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

.onboarding-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: relative;
}

.onboard-step-num {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.05);
  position: absolute;
  top: 18px;
  right: 20px;
}

.onboarding-card h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  margin: 14px 0 8px;
}

.onboarding-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 14px;
}

.onboard-tip-box {
  background: var(--bg-input);
  border-left: 3px solid var(--accent);
  padding: 8px 12px;
  font-size: 0.8rem;
  color: var(--text-light);
}

.onboard-tip-box strong {
  color: var(--accent);
}

/* C2C Anti-Freeze Card Guide */
.c2c-safety-card {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(17, 21, 32, 0.95) 100%);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: var(--radius-lg);
  padding: 32px;
  margin-top: 30px;
}

.c2c-safety-card h4 {
  font-size: 1.3rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.c2c-safety-card p {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.c2c-rules-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .c2c-rules-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.c2c-rule-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.c2c-rule-item h5 {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--accent-gold);
  margin-bottom: 6px;
}

.c2c-rule-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* ==========================================================================
   Section 6: Competitive Matrix (OKX vs Binance vs Others)
   ========================================================================== */
.comparison-table-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow-x: auto;
  box-shadow: var(--shadow-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 720px;
}

.comparison-table th, .comparison-table td {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-subtle);
}

.comparison-table th {
  background: #090c12;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
}

.comparison-table td {
  font-size: 0.92rem;
  color: var(--text-main);
}

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

.comparison-table tr.highlight-okx td {
  background: rgba(0, 220, 130, 0.04);
}

.comparison-table .star-rating {
  color: var(--accent-gold);
  font-weight: 800;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.2s ease;
}

.faq-item.active {
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
}

.faq-question:hover {
  color: var(--accent);
}

.faq-icon-arrow {
  width: 18px;
  height: 18px;
  transition: transform 0.3s ease;
  color: var(--text-dim);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
}

.faq-answer-inner {
  padding: 0 24px 22px;
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.faq-answer-inner strong {
  color: var(--text-main);
}

/* Safe Browsing & Anti-Phishing Banner */
.safe-browsing-card {
  background: linear-gradient(90deg, rgba(239, 68, 68, 0.08) 0%, rgba(17, 21, 32, 0.95) 100%);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: var(--radius-lg);
  padding: 30px;
  margin: 50px auto 0;
  max-width: 860px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.safe-icon-badge {
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  border-radius: var(--radius-md);
  padding: 12px;
  flex-shrink: 0;
}

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

.safe-info h4 {
  font-size: 1.15rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 8px;
}

.safe-info p {
  font-size: 0.88rem;
  color: #cbd5e1;
  line-height: 1.6;
}

/* ==========================================================================
   Editorial Board & About Us Section (E-E-A-T Core)
   ========================================================================== */
.about-portal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  margin-top: 60px;
}

.about-portal-box h3 {
  font-size: 1.4rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.about-portal-box p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
}

.editorial-principles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}

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

.principle-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
}

.principle-card h5 {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.principle-card p {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-bottom: 0;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: #050608;
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 110px;
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

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

.footer-brand p {
  margin: 14px 0 20px;
  line-height: 1.6;
  max-width: 420px;
}

.footer-links-col h5 {
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-links-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.risk-warning-box {
  background: #090c12;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 30px;
}

.risk-warning-title {
  color: var(--accent-gold);
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.risk-warning-desc {
  font-size: 0.82rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

@media (min-width: 640px) {
  .footer-bottom {
    flex-direction: row;
    text-align: left;
  }
}

/* ==========================================================================
   Mobile Sticky Bottom Floating Bar
   ========================================================================== */
.mobile-sticky-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  background: rgba(12, 15, 23, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-highlight);
  padding: 10px 16px;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

@media (min-width: 769px) {
  .mobile-sticky-bar {
    display: none;
  }
  .site-footer {
    padding-bottom: 60px;
  }
}

.sticky-code-badge {
  display: flex;
  flex-direction: column;
}

.sticky-code-lbl {
  font-size: 0.68rem;
  color: var(--text-dim);
  text-transform: uppercase;
}

.sticky-code-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--accent);
}

.sticky-actions-group {
  display: flex;
  gap: 8px;
}

.btn-sticky-copy {
  background: var(--bg-card-hover);
  border: 1px solid var(--border-highlight);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 4px;
}

.btn-sticky-register {
  background: var(--accent);
  color: #000;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 4px;
  box-shadow: 0 2px 10px rgba(0, 220, 130, 0.4);
}

/* ==========================================================================
   Toast Notification Component
   ========================================================================== */
.toast-container {
  position: fixed;
  top: 85px;
  right: 20px;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.toast {
  background: #111927;
  color: #fff;
  border: 1px solid var(--accent);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.6), 0 0 15px rgba(0, 220, 130, 0.3);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateX(120%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.toast.show {
  transform: translateX(0);
}

.toast-icon {
  color: var(--accent);
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

/* ==========================================================================
   Modals
   ========================================================================== */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(8px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.modal-overlay.active {
  display: flex;
}

.modal-dialog {
  background: #11141c;
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  animation: modalIn 0.25s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.95) translateY(10px); }
  to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
}

.modal-close-btn {
  color: var(--text-dim);
  font-size: 1.5rem;
  line-height: 1;
  padding: 4px;
}

.modal-close-btn:hover {
  color: #fff;
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.modal-body h4 {
  color: #fff;
  margin: 16px 0 6px;
  font-size: 1rem;
}

.modal-body p {
  margin-bottom: 12px;
}