/* ==========================================================================
   Bianvar 加密百科 · 欧易 OKX 深度评测与官方合作落地页核心样式表
   版本：v2.0 深度合规重装版
   设计规范：Web3 暗黑科技感 / 极速原生 / 100% 移动端适配 / 丰富数据表格
   ========================================================================== */

:root {
  --primary: #00E575;
  --primary-hover: #00c763;
  --primary-glow: rgba(0, 229, 117, 0.25);
  --accent-blue: #0088FF;
  --accent-blue-glow: rgba(0, 136, 255, 0.2);
  --accent-purple: #7928CA;
  --gold: #FFB800;
  --gold-glow: rgba(255, 184, 0, 0.2);
  --danger: #FF4757;
  --danger-bg: rgba(255, 71, 87, 0.1);
  
  --bg-dark: #07090e;
  --bg-secondary: #0c1017;
  --bg-card: rgba(16, 22, 34, 0.8);
  --bg-card-hover: rgba(22, 30, 46, 0.95);
  
  --border-light: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.15);
  --border-accent: rgba(0, 229, 117, 0.35);
  
  --text-main: #f3f4f6;
  --text-muted: #9ca3af;
  --text-dim: #6b7280;
  
  --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: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-family: var(--font-sans);
  background-color: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(0, 229, 117, 0.07) 0%, transparent 45%),
    radial-gradient(circle at 85% 25%, rgba(0, 136, 255, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 15% 55%, rgba(121, 40, 202, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 50% 85%, rgba(0, 229, 117, 0.04) 0%, transparent 50%);
  background-attachment: fixed;
}

a {
  color: inherit;
  text-decoration: none;
}

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

.container {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ==========================================================================
   顶部合规通告栏 (E-E-A-T 独立第三方声明)
   ========================================================================== */
.top-notice-bar {
  background: linear-gradient(90deg, #090e16, #121c29, #090e16);
  border-bottom: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--text-muted);
  padding: 9px 16px;
  text-align: center;
  position: relative;
  z-index: 100;
}

.notice-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.badge-tag {
  background: rgba(0, 229, 117, 0.15);
  color: var(--primary);
  border: 1px solid rgba(0, 229, 117, 0.3);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

.badge-warning {
  background: rgba(255, 184, 0, 0.15);
  color: var(--gold);
  border: 1px solid rgba(255, 184, 0, 0.3);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

/* ==========================================================================
   主导航栏 Header
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: rgba(7, 9, 14, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition-normal);
}

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

.logo-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  box-shadow: 0 0 16px var(--primary-glow);
}

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

.brand-title {
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.3px;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-subtitle {
  font-size: 11px;
  color: var(--text-dim);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a,
.dropdown-toggle {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  transition: var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.nav-links a:hover,
.dropdown-toggle:hover {
  color: var(--primary);
}

/* 下拉菜单样式 */
.nav-item-dropdown {
  position: relative;
  display: flex;
  align-items: center;
}

.dropdown-arrow {
  width: 12px;
  height: 12px;
  transition: transform 0.25s ease;
  color: var(--text-dim);
}

.nav-item-dropdown:hover .dropdown-arrow,
.nav-item-dropdown:focus-within .dropdown-arrow {
  transform: rotate(180deg);
  color: var(--primary);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: rgba(13, 18, 28, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 8px;
  min-width: 200px;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 229, 117, 0.08);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 100;
}

.nav-item-dropdown:hover .dropdown-menu,
.nav-item-dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 13.5px;
  color: var(--text-muted);
  transition: all 0.15s ease;
  white-space: nowrap;
}

.dropdown-item:hover {
  background: rgba(0, 229, 117, 0.1);
  color: #fff;
  transform: translateX(3px);
}

.dropdown-item svg {
  color: var(--primary);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

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

/* 导航专属邀请码微型胶囊 */
.nav-code-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 229, 117, 0.08);
  border: 1px dashed var(--primary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  color: #fff;
  font-size: 13px;
  transition: var(--transition-fast);
  cursor: pointer;
}

.nav-code-pill:hover {
  background: rgba(0, 229, 117, 0.18);
  box-shadow: 0 0 12px var(--primary-glow);
}

.nav-code-pill .pill-label {
  font-size: 11px;
  color: var(--text-dim);
}

.nav-code-pill .pill-code {
  font-family: var(--font-mono);
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 0.5px;
}

.btn-nav {
  padding: 8px 18px;
  font-size: 13.5px;
}

/* 移动端汉堡切换按钮 */
.hamburger-btn {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-light);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: var(--transition-fast);
}

.hamburger-btn span {
  width: 18px;
  height: 2px;
  background-color: #fff;
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

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

/* 移动端全屏折叠抽屉菜单 */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(7, 9, 14, 0.98);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: 85;
  flex-direction: column;
  padding: 24px 20px 80px;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.mobile-drawer.open {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mobile-drawer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.mobile-drawer-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  font-size: 14.5px;
  font-weight: 600;
  color: #fff;
  transition: var(--transition-fast);
}

.mobile-drawer-links a:hover {
  background: rgba(0, 229, 117, 0.08);
  border-color: var(--border-accent);
  color: var(--primary);
}

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  transition: var(--transition-normal);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #00b359 100%);
  color: #000;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(0, 229, 117, 0.4);
  background: linear-gradient(135deg, #1aff8c 0%, #00c763 100%);
}

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

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.btn-code {
  background: rgba(0, 229, 117, 0.08);
  border: 1px dashed var(--primary);
  color: var(--primary);
  padding: 8px 16px;
  font-size: 13px;
  font-family: var(--font-mono);
  border-radius: var(--radius-full);
}

.btn-code:hover {
  background: rgba(0, 229, 117, 0.18);
}

.btn-lg {
  padding: 14px 26px;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius-md);
}

.btn-copy {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.16);
  color: #fff;
}

.btn-copy:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--primary);
  color: var(--primary);
}

/* ==========================================================================
   Hero 首屏核心区
   ========================================================================== */
.hero-section {
  padding: 70px 0 50px;
  position: relative;
}

.hero-wrapper {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 117, 0.08);
  border: 1px solid rgba(0, 229, 117, 0.25);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  width: fit-content;
}

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

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 229, 117, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 229, 117, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 229, 117, 0); }
}

.hero-title {
  font-size: 44px;
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -1px;
}

.gradient-text {
  background: linear-gradient(120deg, #FFFFFF 15%, var(--primary) 65%, var(--accent-blue) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 16.5px;
  color: var(--text-muted);
  line-height: 1.7;
  max-width: 600px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.hero-tag-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: #e5e7eb;
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.hero-tag-item svg {
  color: var(--primary);
}

/* 核心推荐码卡片 */
.referral-card {
  background: linear-gradient(160deg, rgba(16, 24, 38, 0.95) 0%, rgba(10, 14, 22, 0.95) 100%);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), 0 0 30px rgba(0, 229, 117, 0.08);
  position: relative;
  overflow: hidden;
}

.card-shine {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent-blue), transparent);
}

.card-header-badge {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.rebate-tag {
  background: rgba(255, 184, 0, 0.15);
  color: var(--gold);
  border: 1px solid rgba(255, 184, 0, 0.3);
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  gap: 6px;
}

.verified-tag {
  color: var(--text-dim);
  font-size: 12px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.code-display-box {
  background: rgba(0, 0, 0, 0.5);
  border: 2px dashed rgba(0, 229, 117, 0.45);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  margin-bottom: 24px;
  position: relative;
  cursor: pointer;
  transition: var(--transition-normal);
}

.code-display-box:hover {
  border-color: var(--primary);
  background: rgba(0, 229, 117, 0.04);
}

.code-label {
  font-size: 12px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.code-text {
  font-size: 40px;
  font-weight: 900;
  letter-spacing: 4px;
  font-family: var(--font-mono);
  color: #FFFFFF;
  text-shadow: 0 0 20px rgba(0, 229, 117, 0.5);
}

.code-desc {
  font-size: 13px;
  color: var(--primary);
  margin-top: 6px;
  font-weight: 500;
}

.card-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.card-footer-tip {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
}

.card-footer-tip svg {
  flex-shrink: 0;
  color: var(--primary);
}

/* ==========================================================================
   数据与可信度指标栏 (Trust Bar)
   ========================================================================== */
.trust-bar {
  padding: 30px 0 60px;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 10px;
  border-right: 1px solid var(--border-light);
}

.trust-item:last-child {
  border-right: none;
}

.trust-value {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-mono);
  letter-spacing: -0.5px;
}

.trust-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ==========================================================================
   通用区块排版
   ========================================================================== */
.section {
  padding: 85px 0;
  position: relative;
}

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

.section-pill {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
  background: rgba(0, 229, 117, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.section-title {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  color: #fff;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   高质感数据对比表格 (Data Tables: 费率对比 & KYC对照)
   ========================================================================== */
.data-table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  margin-top: 30px;
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
  min-width: 650px;
}

.data-table th {
  background: rgba(255, 255, 255, 0.04);
  padding: 16px 20px;
  color: #fff;
  font-weight: 700;
  border-bottom: 1px solid var(--border-light);
  text-transform: uppercase;
  font-size: 12.5px;
  letter-spacing: 0.5px;
}

.data-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-muted);
}

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

.data-table tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

.data-table .highlight-col {
  background: rgba(0, 229, 117, 0.04);
  color: var(--primary);
  font-weight: 700;
}

.data-table th.highlight-header {
  background: rgba(0, 229, 117, 0.1);
  color: var(--primary);
  border-bottom: 2px solid var(--primary);
}

.table-tag {
  display: inline-block;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 600;
}

.table-tag-green {
  background: rgba(0, 229, 117, 0.15);
  color: var(--primary);
  border: 1px solid rgba(0, 229, 117, 0.3);
}

.table-tag-gold {
  background: rgba(255, 184, 0, 0.15);
  color: var(--gold);
  border: 1px solid rgba(255, 184, 0, 0.3);
}

.table-summary-box {
  background: rgba(0, 229, 117, 0.05);
  border: 1px solid rgba(0, 229, 117, 0.2);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.table-summary-text h4 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 4px;
}

.table-summary-text p {
  font-size: 13.5px;
  color: var(--text-muted);
}

/* ==========================================================================
   警示与安全提示框 (Callouts)
   ========================================================================== */
.callout-box {
  border-radius: var(--radius-md);
  padding: 24px;
  margin-top: 24px;
  position: relative;
  line-height: 1.7;
}

.callout-warning {
  background: rgba(255, 184, 0, 0.06);
  border-left: 4px solid var(--gold);
  border-top: 1px solid rgba(255, 184, 0, 0.15);
  border-right: 1px solid rgba(255, 184, 0, 0.15);
  border-bottom: 1px solid rgba(255, 184, 0, 0.15);
}

.callout-danger {
  background: rgba(255, 71, 87, 0.06);
  border-left: 4px solid var(--danger);
  border-top: 1px solid rgba(255, 71, 87, 0.15);
  border-right: 1px solid rgba(255, 71, 87, 0.15);
  border-bottom: 1px solid rgba(255, 71, 87, 0.15);
}

.callout-info {
  background: rgba(0, 136, 255, 0.06);
  border-left: 4px solid var(--accent-blue);
  border-top: 1px solid rgba(0, 136, 255, 0.15);
  border-right: 1px solid rgba(0, 136, 255, 0.15);
  border-bottom: 1px solid rgba(0, 136, 255, 0.15);
}

.callout-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.callout-warning .callout-title { color: var(--gold); }
.callout-danger .callout-title { color: var(--danger); }
.callout-info .callout-title { color: var(--accent-blue); }

.callout-desc {
  font-size: 13.5px;
  color: var(--text-muted);
}

/* ==========================================================================
   防冻卡 5 大铁律模块
   ========================================================================== */
.rules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.rule-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px;
  position: relative;
  transition: var(--transition-normal);
}

.rule-card:hover {
  border-color: rgba(255, 184, 0, 0.3);
  transform: translateY(-3px);
}

.rule-number {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  color: var(--gold);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.rule-title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.rule-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   产品生态全景卡片 (Products & Ecosystem)
   ========================================================================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 30px;
}

.product-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 26px 22px;
  transition: var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  border-color: var(--border-accent);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
}

.product-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 22px;
}

.product-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}

.product-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
  flex-grow: 1;
}

.product-tag {
  margin-top: 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ==========================================================================
   权益与福利卡片区 (Benefits)
   ========================================================================== */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.benefit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 30px;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.benefit-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4), 0 0 20px rgba(0, 229, 117, 0.08);
}

.benefit-icon-wrapper {
  width: 54px;
  height: 54px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 24px;
}

.icon-green {
  background: rgba(0, 229, 117, 0.15);
  color: var(--primary);
}

.icon-gold {
  background: rgba(255, 184, 0, 0.15);
  color: var(--gold);
}

.icon-blue {
  background: rgba(0, 136, 255, 0.15);
  color: var(--accent-blue);
}

.benefit-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
}

.benefit-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.65;
  flex-grow: 1;
}

.benefit-extra {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ==========================================================================
   图文分步注册教程 (Steps Guide)
   ========================================================================== */
.steps-wrapper {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  position: relative;
  transition: var(--transition-normal);
}

.step-card:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: var(--bg-card-hover);
}

.step-number-badge {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, rgba(0, 229, 117, 0.2), rgba(0, 136, 255, 0.2));
  border: 1px solid var(--border-accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.step-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}

.step-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
}

.step-tip {
  margin-top: 14px;
  padding: 8px 10px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: var(--radius-sm);
  font-size: 12px;
  color: var(--primary);
  border-left: 2px solid var(--primary);
}

/* ==========================================================================
   安全与防钓鱼专栏 (Anti-Phishing Section)
   ========================================================================== */
.security-box {
  background: linear-gradient(160deg, rgba(16, 25, 38, 0.9), rgba(9, 14, 23, 0.9));
  border: 1px solid rgba(0, 229, 117, 0.25);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-top: 30px;
}

.security-item {
  display: flex;
  gap: 18px;
}

.security-item-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: rgba(0, 229, 117, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.security-item-content h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
}

.security-item-content p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.official-verify-box {
  margin-top: 36px;
  background: rgba(0, 0, 0, 0.4);
  border: 1px dashed rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.verify-info h5 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.verify-info p {
  font-size: 12px;
  color: var(--text-dim);
}

/* ==========================================================================
   常见问题 FAQ (手风琴)
   ========================================================================== */
.faq-list {
  max-width: 880px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.faq-item:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.faq-question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  transition: var(--transition-fast);
}

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

.faq-icon {
  width: 20px;
  height: 20px;
  transition: transform 0.3s ease;
  color: var(--text-dim);
  flex-shrink: 0;
}

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  background: rgba(0, 0, 0, 0.25);
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
}

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

/* ==========================================================================
   底部行动号召 CTA 区域
   ========================================================================== */
.final-cta-section {
  padding: 60px 0 80px;
}

.final-cta-box {
  background: radial-gradient(circle at 50% 50%, rgba(0, 229, 117, 0.12) 0%, rgba(12, 17, 26, 0.95) 80%);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 60px 30px;
  text-align: center;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
}

.final-cta-box h2 {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
}

.final-cta-box p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0 auto 32px;
}

.final-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ==========================================================================
   页尾 Footer 与 E-E-A-T 合规声明
   ========================================================================== */
.site-footer {
  background: #040508;
  border-top: 1px solid var(--border-light);
  padding: 60px 0 40px;
  font-size: 13px;
  color: var(--text-dim);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 40px;
}

.footer-brand h4 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  line-height: 1.7;
  max-width: 420px;
}

.footer-col h5 {
  font-size: 14px;
  color: #fff;
  margin-bottom: 14px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

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

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

.footer-disclaimer-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 30px;
  line-height: 1.75;
}

.footer-disclaimer-box h6 {
  font-size: 12.5px;
  color: var(--gold);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  font-size: 12px;
}

/* ==========================================================================
   交互组件：Toast 提示
   ========================================================================== */
.toast {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: rgba(16, 24, 38, 0.95);
  border: 1px solid var(--primary);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7), 0 0 20px var(--primary-glow);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  font-weight: 600;
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
}

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

/* ==========================================================================
   移动端固定底部悬浮转化条
   ========================================================================== */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(7, 9, 14, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-light);
  padding: 10px 16px;
  z-index: 80;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.mobile-code-label {
  font-size: 10px;
  color: var(--text-dim);
}

.mobile-code-val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 800;
  color: var(--primary);
}

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

/* ==========================================================================
   响应式断点适配
   ========================================================================== */
@media (max-width: 1100px) {
  .hero-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .hero-content {
    text-align: center;
    align-items: center;
  }
  
  .hero-desc {
    margin: 0 auto;
  }
  
  .hero-tags {
    justify-content: center;
  }

  .referral-card {
    max-width: 580px;
    margin: 0 auto;
  }

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

  .steps-wrapper {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .trust-item:nth-child(2) {
    border-right: none;
  }

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

@media (max-width: 992px) {
  .nav-links {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .mobile-drawer {
    display: flex;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 32px;
  }

  .section-title {
    font-size: 26px;
  }

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

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

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

  .steps-wrapper {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .mobile-sticky-bar {
    display: flex;
  }

  body {
    padding-bottom: 70px;
  }
}

@media (max-width: 520px) {
  .brand-subtitle {
    display: none;
  }

  .nav-code-pill .pill-label {
    display: none;
  }

  .btn-nav span {
    font-size: 12px;
  }
}