/* ==========================================================================
   OKX 欧易推广落地页核心样式表 (2026 现代科技暗黑风)
   特点：高性能无依赖、移动端优先自适应、微动效交互、极致可读性
   ========================================================================== */

:root {
  --bg-main: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #172236;
  --bg-input: #1a2438;
  --text-primary: #f3f4f6;
  --text-secondary: #9ca3af;
  --text-muted: #6b7280;
  --accent-green: #00e073;
  --accent-green-hover: #00c965;
  --accent-green-glow: rgba(0, 224, 115, 0.25);
  --accent-blue: #3b82f6;
  --accent-yellow: #f59e0b;
  --border-color: #1f293d;
  --border-highlight: #2e3e5c;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --container-width: 1140px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 25px var(--accent-green-glow);
  --transition-normal: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  overflow-x: hidden;
  position: relative;
  min-height: 100vh;
}

/* 顶部与全局背景微光晕 */
.bg-ambient-glow {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 1200px;
  height: 600px;
  background: radial-gradient(circle at 50% 10%, rgba(0, 224, 115, 0.12) 0%, rgba(59, 130, 246, 0.05) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

/* 顶部安全防飘红声明栏 (Google Safe Browsing & Compliance Badge) */
.safety-announcement-bar {
  background: linear-gradient(90deg, #111e33 0%, #0d1a2d 100%);
  border-bottom: 1px solid var(--border-color);
  font-size: 0.84rem;
  color: #93c5fd;
  padding: 10px 0;
  text-align: center;
}

.safety-announcement-bar .badge {
  display: inline-block;
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  font-weight: 600;
  margin-right: 8px;
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* 导航头 */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  z-index: 100;
  padding: 14px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: #fff;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: #000;
  border: 1px solid var(--border-highlight);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
  color: #fff;
  letter-spacing: -0.5px;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}

.logo-tag {
  font-size: 0.75rem;
  background: rgba(0, 224, 115, 0.15);
  color: var(--accent-green);
  padding: 2px 7px;
  border-radius: 4px;
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition-normal);
}

.nav-links a:hover {
  color: var(--accent-green);
}

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

/* 按钮规范 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-normal);
  border: none;
}

.btn-primary {
  background: var(--accent-green);
  color: #05140b;
  box-shadow: 0 4px 15px var(--accent-green-glow);
}

.btn-primary:hover {
  background: var(--accent-green-hover);
  box-shadow: 0 6px 22px rgba(0, 224, 115, 0.4);
  transform: translateY(-2px);
}

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

.btn-outline:hover {
  border-color: var(--accent-green);
  color: var(--accent-green);
  background: rgba(0, 224, 115, 0.05);
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* 首屏 HERO 区域 */
.hero-section {
  padding: 60px 0 50px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 224, 115, 0.08);
  border: 1px solid rgba(0, 224, 115, 0.25);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  color: var(--accent-green);
  font-weight: 600;
  margin-bottom: 24px;
}

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

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
  letter-spacing: -0.5px;
}

.hero-title .highlight {
  background: linear-gradient(135deg, #00f57d 0%, #00bc56 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

/* 专属邀请码高转化卡片 */
.referral-hero-card {
  max-width: 680px;
  margin: 0 auto 40px;
  background: linear-gradient(180deg, #162238 0%, #111929 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}

.referral-hero-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #3b82f6, #00e073, #3b82f6);
}

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

.ref-label {
  font-size: 0.9rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.ref-badge {
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-yellow);
  font-size: 0.78rem;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-weight: 700;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

.code-box-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #090e18;
  border: 1px dashed var(--accent-green);
  border-radius: var(--radius-md);
  padding: 12px 18px;
  margin-bottom: 20px;
  gap: 12px;
}

.code-display {
  display: flex;
  flex-direction: column;
  text-align: left;
}

.code-title {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.code-value {
  font-family: var(--font-mono);
  font-size: 1.9rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 2px;
}

.copy-btn {
  background: rgba(0, 224, 115, 0.15);
  border: 1px solid var(--accent-green);
  color: var(--accent-green);
  font-weight: 700;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.95rem;
}

.copy-btn:hover {
  background: var(--accent-green);
  color: #06150b;
}

.ref-benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.benefit-item {
  background: rgba(255, 255, 255, 0.03);
  padding: 10px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
}

.benefit-item .val {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--accent-green);
  display: block;
}

.benefit-item .desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 2px;
}

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

.official-guarantee {
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

/* 信任背书横幅 */
.trust-strip {
  padding: 30px 0;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  background: rgba(17, 24, 39, 0.4);
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.trust-card h4 {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
}

.trust-card p {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* 模块通用标题 */
.section {
  padding: 80px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 750px;
  margin: 0 auto 50px;
}

.section-tag {
  color: var(--accent-green);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  display: block;
  margin-bottom: 8px;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-secondary);
}

/* 权益对比表格 (填码 vs 无码) */
.comparison-container {
  max-width: 860px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.comparison-table th, 
.comparison-table td {
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
  background: #151d2f;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-secondary);
}

.comparison-table th.highlight-col {
  background: rgba(0, 224, 115, 0.12);
  color: var(--accent-green);
  border-bottom-color: rgba(0, 224, 115, 0.3);
}

.comparison-table td.highlight-col {
  background: rgba(0, 224, 115, 0.03);
  font-weight: 700;
  color: #fff;
}

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

.comparison-table .tag-green {
  color: var(--accent-green);
  font-weight: 700;
}

.comparison-table .tag-gray {
  color: var(--text-muted);
}

/* 交互式手续费节省计算器 (高互动提升 Dwell Time & 转化) */
.calc-card {
  max-width: 820px;
  margin: 0 auto;
  background: linear-gradient(180deg, #131c2e 0%, #0e1625 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.slider-group {
  margin-top: 20px;
}

.slider-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.slider-val {
  font-family: var(--font-mono);
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--accent-green);
}

.range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: #1f2a40;
  outline: none;
}

.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent-green);
  cursor: pointer;
  box-shadow: 0 0 10px var(--accent-green);
  transition: transform 0.15s;
}

.range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.calc-result-box {
  background: #090e17;
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
}

.calc-result-box .label {
  font-size: 0.88rem;
  color: var(--text-secondary);
}

.calc-result-box .amount {
  font-family: var(--font-mono);
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent-green);
  margin: 8px 0;
}

.calc-result-box .subtext {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* 极简 3 步保姆级注册流程 (HowTo) */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  position: relative;
  transition: var(--transition-normal);
}

.step-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  background: var(--bg-card-hover);
}

.step-badge {
  position: absolute;
  top: -14px;
  left: 24px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  padding: 3px 12px;
  border-radius: var(--radius-full);
}

.step-card:nth-child(2) .step-badge {
  background: linear-gradient(135deg, #10b981, #059669);
}

.step-card:nth-child(3) .step-badge {
  background: linear-gradient(135deg, #f59e0b, #d97706);
}

.step-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.step-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.step-desc {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.step-highlight {
  margin-top: 14px;
  padding: 10px;
  background: rgba(0, 224, 115, 0.08);
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  color: var(--accent-green);
  border: 1px dashed rgba(0, 224, 115, 0.3);
}

/* App 下载指引 */
.download-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.download-card h3 {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.download-card ul {
  list-style: none;
  margin: 16px 0 24px;
}

.download-card ul li {
  font-size: 0.92rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  position: relative;
  padding-left: 20px;
}

.download-card ul li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: var(--accent-green);
}

/* 安全防护与 C2C 防冻卡教程 */
.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.knowledge-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.knowledge-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}

.knowledge-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(59, 130, 246, 0.15);
  color: #60a5fa;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.knowledge-card:nth-child(2) .knowledge-icon {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
}

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

.knowledge-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.knowledge-tips {
  background: #0d1422;
  border-left: 3px solid var(--accent-green);
  padding: 12px 16px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: #d1d5db;
}

/* 常见问题 FAQ 手风琴 (Accordions for SEO Rich Snippets) */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition-normal);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 20px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.3s ease;
  color: var(--text-muted);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
  padding: 0 24px;
}

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

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

.faq-item.active .faq-answer {
  padding-bottom: 22px;
}

.faq-answer p {
  font-size: 0.94rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* 底部行动召唤 CTA */
.cta-banner {
  background: linear-gradient(135deg, #16243d 0%, #0d182b 100%);
  border: 1px solid var(--border-highlight);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: center;
  box-shadow: var(--shadow-card);
  margin-bottom: 60px;
}

.cta-banner h2 {
  font-size: 2rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.cta-banner p {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 28px;
}

/* 页脚合规与免责声明 */
.site-footer {
  background: #070a10;
  border-top: 1px solid var(--border-color);
  padding: 50px 0 90px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 30px;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-brand {
  max-width: 380px;
}

.footer-brand h3 {
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: var(--transition-normal);
}

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

.footer-disclaimer {
  padding: 20px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  margin-bottom: 24px;
  line-height: 1.7;
}

.footer-copyright {
  text-align: center;
  border-top: 1px solid var(--border-color);
  padding-top: 24px;
  font-size: 0.78rem;
}

/* 移动端吸底操作栏 (Sticky Bottom CTA Bar) */
.mobile-sticky-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(11, 16, 26, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--border-color);
  padding: 12px 16px;
  z-index: 999;
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.4);
}

.mobile-sticky-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  max-width: 500px;
  margin: 0 auto;
}

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

.mobile-code-info span {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.mobile-code-info strong {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--accent-green);
}

/* 复制成功 Toast 弹窗 */
.toast-notice {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-100px);
  background: rgba(16, 24, 39, 0.95);
  border: 1px solid var(--accent-green);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5), 0 0 20px var(--accent-green-glow);
  z-index: 9999;
  transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275), opacity 0.3s;
  opacity: 0;
  pointer-events: none;
}

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

/* 响应式断点 */
@media (max-width: 900px) {
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .download-grid,
  .knowledge-grid,
  .calc-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .calc-card {
    padding: 24px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .hero-section {
    padding: 40px 0 30px;
  }
  .ref-benefits-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .code-value {
    font-size: 1.5rem;
  }
  .mobile-sticky-bar {
    display: block;
  }
  body {
    padding-bottom: 70px;
  }
  .comparison-table th, 
  .comparison-table td {
    padding: 12px 14px;
    font-size: 0.85rem;
  }
}