/* ==========================================================================
   OKX 欧易优质 SEO 推广落地页 - 样式表 (styles.css)
   设计风格：现代化金融科技 (FinTech) 暗黑风格、极速加载、极致移动端适配
   ========================================================================== */

:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #111622;
  --bg-card: #161d2c;
  --bg-card-hover: #1c2538;
  --bg-subtle: rgba(255, 255, 255, 0.04);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-highlight: rgba(0, 240, 118, 0.3);
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-white: #ffffff;
  
  --accent-primary: #00f076; /* OKX 标志性亮绿色 */
  --accent-primary-hover: #00d668;
  --accent-secondary: #38bdf8; /* 科技蓝 */
  --accent-glow: rgba(0, 240, 118, 0.2);
  --accent-warning: #f59e0b;
  --accent-danger: #ef4444;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  
  --container-max: 1200px;
  --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

/* 基础全局重置 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

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

/* 背景微光氛围装饰 */
.bg-glow-orb {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 550px;
  background: radial-gradient(circle, rgba(0, 240, 118, 0.08) 0%, rgba(56, 189, 248, 0.04) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* 页面容器 */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
  position: relative;
  z-index: 1;
}

/* 顶部安全防红与合规告示栏 */
.top-notice-bar {
  background: rgba(16, 24, 39, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  padding: 10px 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

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

.notice-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(0, 240, 118, 0.12);
  color: var(--accent-primary);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  border: 1px solid rgba(0, 240, 118, 0.25);
}

.notice-badge svg {
  width: 14px;
  height: 14px;
}

/* 导航头 */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 13, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-white);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.5px;
}

.logo-badge {
  background: #000;
  color: #fff;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-weight: 900;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: inline-block;
  letter-spacing: 1px;
}

.brand-sub {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

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

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* 邀请码快捷胶囊 */
.code-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-color);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.88rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.code-pill:hover {
  border-color: var(--accent-primary);
  background: rgba(0, 240, 118, 0.08);
}

.code-pill strong {
  color: var(--accent-primary);
  font-family: var(--font-mono);
  letter-spacing: 0.5px;
  font-weight: 700;
}

.code-pill svg {
  width: 15px;
  height: 15px;
  stroke: var(--text-muted);
  transition: var(--transition);
}

.code-pill:hover svg {
  stroke: var(--accent-primary);
}

/* 按钮通用 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-primary);
  color: #000;
  box-shadow: 0 4px 18px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(0, 240, 118, 0.35);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1.1rem;
}

/* 移动端汉堡菜单 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 6px;
}

.menu-toggle svg {
  width: 26px;
  height: 26px;
}

/* ==========================================================================
   Hero 首屏板块
   ========================================================================== */
.hero-section {
  padding: 60px 0 70px 0;
  text-align: center;
  position: relative;
}

.hero-pill-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 240, 118, 0.08);
  border: 1px solid rgba(0, 240, 118, 0.25);
  color: var(--accent-primary);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero-pill-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 10px var(--accent-primary);
  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: 3rem;
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -1px;
  margin-bottom: 20px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.hero-title .gradient-text {
  background: linear-gradient(135deg, #ffffff 30%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 780px;
  margin: 0 auto 36px auto;
  line-height: 1.7;
}

/* Hero 邀请码高亮卡片 */
.hero-invite-box {
  background: linear-gradient(145deg, rgba(22, 29, 44, 0.9) 0%, rgba(17, 22, 34, 0.9) 100%);
  border: 1px solid rgba(0, 240, 118, 0.3);
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6), 0 0 30px rgba(0, 240, 118, 0.1);
  border-radius: var(--radius-lg);
  padding: 30px;
  max-width: 680px;
  margin: 0 auto 40px auto;
}

.invite-box-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
  flex-wrap: wrap;
  gap: 10px;
}

.invite-tag {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}

.invite-status {
  color: var(--accent-primary);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
}

.invite-code-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #0d111a;
  border: 1px dashed rgba(0, 240, 118, 0.4);
  border-radius: var(--radius-md);
  padding: 14px 22px;
  margin-bottom: 20px;
  gap: 16px;
}

.code-display {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.code-display .label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.code-display .code-val {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 900;
  color: var(--accent-primary);
  letter-spacing: 2px;
}

.btn-copy-lg {
  background: rgba(0, 240, 118, 0.15);
  color: var(--accent-primary);
  border: 1px solid rgba(0, 240, 118, 0.4);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}

.btn-copy-lg:hover {
  background: var(--accent-primary);
  color: #000;
}

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

.hero-security-notes {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}

.hero-security-notes span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.hero-security-notes svg {
  width: 16px;
  height: 16px;
  color: var(--accent-primary);
}

/* ==========================================================================
   特权福利板块 (Benefits)
   ========================================================================== */
.section {
  padding: 70px 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 50px auto;
}

.section-tag {
  color: var(--accent-primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 8px;
  display: inline-block;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 14px;
  letter-spacing: -0.5px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

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

.benefit-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.benefit-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-highlight);
  box-shadow: var(--shadow-card);
}

.benefit-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), transparent);
  opacity: 0;
  transition: var(--transition);
}

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

.benefit-icon-wrapper {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(0, 240, 118, 0.1);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}

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

.benefit-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.benefit-desc {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* ==========================================================================
   三大权威保障板块 (Trust / Safety)
   ========================================================================== */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.trust-item {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 26px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.trust-stat {
  font-size: 2.2rem;
  font-weight: 900;
  font-family: var(--font-mono);
  color: var(--accent-primary);
}

.trust-label {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-white);
}

.trust-detail {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   新手 5 步注册教程 (Step-by-Step Guide)
   ========================================================================== */
.guide-wrapper {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
}

.step-card {
  display: flex;
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin-bottom: 24px;
  transition: var(--transition);
}

.step-card:hover {
  border-color: rgba(0, 240, 118, 0.25);
  background: var(--bg-card-hover);
}

.step-number {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #000;
  border: 2px solid var(--accent-primary);
  color: var(--accent-primary);
  font-weight: 800;
  font-size: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
}

.step-body {
  flex: 1;
}

.step-heading {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 10px;
}

.step-content {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

.step-content ul {
  margin: 10px 0 10px 20px;
}

.step-content li {
  margin-bottom: 6px;
}

.highlight-box {
  background: rgba(0, 240, 118, 0.07);
  border-left: 3px solid var(--accent-primary);
  padding: 10px 14px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-top: 12px;
  font-size: 0.88rem;
  color: var(--text-primary);
}

/* ==========================================================================
   安全与防钓鱼专区 (Anti-Phishing) - 防飘红关键
   ========================================================================== */
.security-alert-box {
  background: linear-gradient(145deg, rgba(30, 41, 59, 0.6) 0%, rgba(15, 23, 42, 0.8) 100%);
  border: 1px solid rgba(56, 189, 248, 0.3);
  border-radius: var(--radius-lg);
  padding: 34px;
  margin-top: 40px;
}

.security-alert-box h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  color: var(--text-white);
  margin-bottom: 16px;
}

.security-alert-box h3 svg {
  color: var(--accent-secondary);
  width: 26px;
  height: 26px;
}

.security-points-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.security-point-item {
  background: rgba(0, 0, 0, 0.3);
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.security-point-item h4 {
  font-size: 1.05rem;
  color: var(--accent-secondary);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

/* ==========================================================================
   常见问题 FAQ 手风琴 (Schema.org 匹配)
   ========================================================================== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.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: rgba(0, 240, 118, 0.3);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  color: var(--text-white);
  font-size: 1.08rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

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

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

/* ==========================================================================
   底部行动号召 CTA 区域
   ========================================================================== */
.bottom-cta-banner {
  background: linear-gradient(135deg, #111a2e 0%, #0d121d 100%);
  border: 1px solid rgba(0, 240, 118, 0.25);
  border-radius: var(--radius-lg);
  padding: 50px 30px;
  text-align: center;
  margin: 60px 0 40px 0;
  position: relative;
  overflow: hidden;
}

.bottom-cta-banner h2 {
  font-size: 2.2rem;
  color: #fff;
  margin-bottom: 14px;
}

.bottom-cta-banner p {
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto 28px auto;
  font-size: 1.05rem;
}

/* ==========================================================================
   页脚 Footer (合规与声明重地)
   ========================================================================== */
.site-footer {
  background: #07090e;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 40px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

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

.footer-brand h4 {
  color: var(--text-white);
  font-size: 1.2rem;
  margin-bottom: 12px;
  font-weight: 700;
}

.footer-brand p {
  line-height: 1.7;
  max-width: 480px;
}

.footer-col h5 {
  color: var(--text-primary);
  font-size: 0.95rem;
  margin-bottom: 16px;
  font-weight: 600;
}

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

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

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

.footer-disclaimer-box {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 22px;
  margin-top: 30px;
  line-height: 1.7;
}

.footer-disclaimer-box strong {
  color: var(--text-secondary);
  display: block;
  margin-bottom: 6px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  margin-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   Toast 复制提示组件
   ========================================================================== */
.toast-notice {
  position: fixed;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: #111a26;
  border: 1px solid var(--accent-primary);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.7), 0 0 15px var(--accent-glow);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  z-index: 9999;
  opacity: 0;
  transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  pointer-events: none;
}

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

.toast-notice svg {
  color: var(--accent-primary);
  width: 20px;
  height: 20px;
}

/* ==========================================================================
   响应式断点适配 (Media Queries)
   ========================================================================== */
@media (max-width: 992px) {
  .hero-title {
    font-size: 2.3rem;
  }
  .trust-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #0a0d14;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
  }
  .menu-toggle {
    display: block;
  }
  .code-pill.nav-hide-mobile {
    display: none;
  }
  .hero-title {
    font-size: 1.85rem;
  }
  .hero-desc {
    font-size: 1rem;
  }
  .code-display .code-val {
    font-size: 1.6rem;
  }
  .step-card {
    flex-direction: column;
    gap: 16px;
  }
  .btn-lg {
    width: 100%;
  }
}