/* oki交易所 - 橙金色主题，清爽白色背景 */
:root {
  --primary: #FF6B35;
  --primary-dark: #e55a25;
  --primary-light: #ff8c5a;
  --secondary: #1a1a2e;
  --accent: #FFB347;
  --gold: #F7C948;
  --text: #1a1a2e;
  --text-light: #6b7280;
  --bg: #ffffff;
  --bg-soft: #fafafa;
  --bg-card: #ffffff;
  --border: #f0f0f0;
  --shadow: 0 4px 24px rgba(255,107,53,0.08);
  --shadow-lg: 0 12px 48px rgba(255,107,53,0.15);
  --radius: 16px;
  --radius-sm: 10px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'PingFang SC', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 顶部公告栏 */
.topbar {
  background: linear-gradient(90deg, #FF6B35, #FFB347);
  color: #fff;
  text-align: center;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 500;
}
.topbar-inner { display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap; }
.topbar-icon { font-size: 14px; }
.topbar-link { color: #fff; font-weight: 700; text-decoration: underline; }

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s;
  margin-top: 40px;
}
.navbar.scrolled {
  margin-top: 0;
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-svg {
  width: 32px;
  height: 32px;
}
.logo-name {
  font-size: 20px;
  font-weight: 900;
  color: var(--text);
  letter-spacing: -0.5px;
}
.logo-name em {
  font-style: normal;
  color: var(--primary);
}
.nav-links {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  text-decoration: none;
  color: var(--text-light);
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--primary); }
.nav-btns { display: flex; gap: 10px; align-items: center; }
.btn-login {
  padding: 8px 20px;
  border: 1.5px solid var(--primary);
  border-radius: 8px;
  color: var(--primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-login:hover { background: var(--primary); color: #fff; }
.btn-register {
  padding: 8px 20px;
  background: var(--primary);
  border-radius: 8px;
  color: #fff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-register:hover { background: var(--primary-dark); }
.nav-toggle { display: none; background: none; border: none; font-size: 22px; cursor: pointer; color: var(--text); }

/* Hero区 */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #fff8f5 0%, #fff3eb 40%, #fff9f0 100%);
  padding: 140px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.06;
}
.hero-circle.c1 {
  width: 600px; height: 600px;
  background: var(--primary);
  top: -200px; right: -100px;
}
.hero-circle.c2 {
  width: 400px; height: 400px;
  background: var(--accent);
  bottom: -100px; left: -100px;
}
.hero-circle.c3 {
  width: 200px; height: 200px;
  background: var(--gold);
  top: 40%; left: 40%;
}
.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,107,53,0.1);
  border: 1px solid rgba(255,107,53,0.2);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.badge-dot {
  width: 6px; height: 6px;
  background: var(--primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.hero-title {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.15;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 20px;
}
.hero-title em {
  font-style: normal;
  color: var(--primary);
}
.hero-sub {
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-btns {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 12px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(255,107,53,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(255,107,53,0.4); }
.btn-primary svg { width: 18px; height: 18px; }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: var(--text);
  color: #fff;
  border-radius: 12px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.3s;
}
.btn-secondary:hover { background: #333; transform: translateY(-2px); }
.btn-secondary svg { width: 18px; height: 18px; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  padding: 14px 28px;
  border: 2px solid var(--primary);
  color: var(--primary);
  border-radius: 12px;
  text-decoration: none;
  font-size: 15px;
  font-weight: 700;
  transition: all 0.3s;
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.hero-stats {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-item strong { display: block; font-size: 22px; font-weight: 900; color: var(--primary); }
.stat-item span { font-size: 12px; color: var(--text-light); }
.stat-divider { width: 1px; height: 36px; background: var(--border); }

/* 手机模型 */
.phone-mockup {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.phone-frame {
  width: 280px;
  background: #1a1a2e;
  border-radius: 40px;
  padding: 12px;
  box-shadow: 0 30px 80px rgba(26,26,46,0.3), 0 0 0 1px rgba(255,255,255,0.1);
}
.phone-screen {
  background: linear-gradient(160deg, #1e2a4a, #0f1629);
  border-radius: 30px;
  padding: 20px 16px;
  overflow: hidden;
}
.screen-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  font-weight: 600;
}
.screen-balance {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 16px;
  text-align: center;
}
.balance-label { color: rgba(255,255,255,0.8); font-size: 11px; margin-bottom: 4px; }
.balance-amount { color: #fff; font-size: 26px; font-weight: 900; letter-spacing: -1px; }
.balance-change { font-size: 12px; margin-top: 4px; }
.balance-change.positive { color: #4ade80; }
.screen-actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}
.action-btn {
  background: rgba(255,255,255,0.08);
  border-radius: 10px;
  padding: 8px 4px;
  text-align: center;
  color: rgba(255,255,255,0.8);
  font-size: 16px;
  cursor: pointer;
}
.action-btn small { display: block; font-size: 9px; color: rgba(255,255,255,0.5); margin-top: 2px; }
.screen-coins { display: flex; flex-direction: column; gap: 8px; }
.coin-row {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,0.05);
  border-radius: 10px;
  padding: 8px 10px;
}
.coin-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.coin-icon.btc { background: #F7931A; }
.coin-icon.eth { background: #627EEA; }
.coin-icon.sol { background: #9945FF; }
.coin-info { flex: 1; }
.coin-info strong { display: block; color: #fff; font-size: 12px; }
.coin-info small { color: rgba(255,255,255,0.4); font-size: 10px; }
.coin-price { text-align: right; font-size: 11px; color: #fff; font-weight: 600; }
.coin-price small { display: block; font-size: 10px; }
.coin-price.positive small { color: #4ade80; }
.coin-price.negative small { color: #f87171; }
.float-card {
  position: absolute;
  background: #fff;
  border-radius: 12px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  white-space: nowrap;
}
.card-left { left: -60px; top: 30%; }
.card-right { right: -60px; bottom: 25%; }
.float-icon { font-size: 20px; }
.float-title { font-size: 12px; font-weight: 700; color: var(--text); }
.float-sub { font-size: 10px; color: var(--text-light); }

/* 行情滚动条 */
.ticker-bar {
  background: var(--secondary);
  padding: 12px 0;
  overflow: hidden;
  position: relative;
}
.ticker-track {
  display: flex;
  gap: 40px;
  animation: ticker 30s linear infinite;
  white-space: nowrap;
}
@keyframes ticker {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
.tick-item {
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  flex-shrink: 0;
}
.tick-item strong { color: #fff; }
.tick-item.positive strong { color: #4ade80; }
.tick-item.negative strong { color: #f87171; }

/* 通用section样式 */
section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-header.light h2 { color: #fff; }
.section-header.light p { color: rgba(255,255,255,0.7); }
.section-tag {
  display: inline-block;
  background: rgba(255,107,53,0.1);
  color: var(--primary);
  border: 1px solid rgba(255,107,53,0.2);
  padding: 4px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.section-header h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-light);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* 功能区 */
.features { background: var(--bg-soft); }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255,107,53,0.2);
}
.feature-card.large { grid-column: span 2; }
.feature-card.large-right { grid-column: span 2; }
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-icon.orange { background: rgba(255,107,53,0.1); color: var(--primary); }
.feature-icon.blue { background: rgba(59,130,246,0.1); color: #3b82f6; }
.feature-icon.green { background: rgba(34,197,94,0.1); color: #22c55e; }
.feature-icon.purple { background: rgba(168,85,247,0.1); color: #a855f7; }
.feature-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }
.feature-stats { display: flex; gap: 12px; margin-top: 16px; flex-wrap: wrap; }
.feature-stats span {
  background: rgba(255,107,53,0.08);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
}

/* 下载区 */
.download { background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%); }
.download .section-tag { background: rgba(255,107,53,0.2); border-color: rgba(255,107,53,0.3); }
.download-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.download-card {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all 0.3s;
  position: relative;
}
.download-card:hover {
  background: rgba(255,255,255,0.08);
  transform: translateY(-4px);
  border-color: rgba(255,107,53,0.3);
}
.download-card.featured {
  border-color: var(--primary);
  background: rgba(255,107,53,0.08);
}
.dl-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: #fff;
  padding: 4px 16px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
}
.dl-icon {
  width: 64px; height: 64px;
  background: rgba(255,107,53,0.15);
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--primary);
}
.dl-icon svg { width: 32px; height: 32px; }
.download-card h3 { color: #fff; font-size: 20px; font-weight: 700; margin-bottom: 6px; }
.dl-version { color: rgba(255,255,255,0.4); font-size: 12px; margin-bottom: 20px; }
.dl-features { list-style: none; text-align: left; margin-bottom: 24px; }
.dl-features li { color: rgba(255,255,255,0.7); font-size: 13px; padding: 5px 0; }
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  color: #fff;
  border-radius: 10px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
  width: 100%;
  justify-content: center;
}
.btn-download:hover { background: rgba(255,255,255,0.2); }
.btn-download svg { width: 16px; height: 16px; }
.btn-download.primary {
  background: var(--primary);
  border-color: var(--primary);
}
.btn-download.primary:hover { background: var(--primary-dark); }

/* 安全区 */
.security { background: var(--bg); }
.security-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.security-left .section-tag { display: inline-block; margin-bottom: 16px; }
.security-left h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 900;
  color: var(--text);
  line-height: 1.2;
  margin-bottom: 16px;
}
.security-left p { color: var(--text-light); line-height: 1.8; margin-bottom: 32px; }
.security-bars { margin-bottom: 32px; }
.bar-item { margin-bottom: 20px; }
.bar-label {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 14px;
}
.bar-label span { color: var(--text-light); }
.bar-label strong { color: var(--primary); font-weight: 700; }
.bar-track {
  height: 8px;
  background: var(--bg-soft);
  border-radius: 100px;
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 100px;
  transition: width 1.5s ease;
}
.security-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.sec-card {
  background: var(--bg-soft);
  border-radius: var(--radius-sm);
  padding: 20px;
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.sec-card:hover { border-color: rgba(255,107,53,0.3); box-shadow: var(--shadow); }
.sec-icon { font-size: 28px; margin-bottom: 10px; }
.sec-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.sec-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* 关于SEO区 */
.about-seo { background: var(--bg-soft); }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.about-text p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 16px;
}
.about-keywords h4 { font-size: 16px; font-weight: 700; margin-bottom: 16px; color: var(--text); }
.keyword-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.keyword-tags span {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text-light);
  padding: 5px 14px;
  border-radius: 100px;
  font-size: 12px;
}
.about-nums {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-num {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
}
.about-num strong { display: block; font-size: 24px; font-weight: 900; color: var(--primary); }
.about-num span { font-size: 12px; color: var(--text-light); }

/* 使用指南 */
.guide { background: var(--bg); }
.guide-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  position: relative;
}
.guide-steps::before {
  content: '';
  position: absolute;
  top: 32px;
  left: calc(16.66% + 20px);
  right: calc(16.66% + 20px);
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 0;
}
.guide-step { position: relative; z-index: 1; }
.step-num {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  color: #fff;
  margin-bottom: 24px;
  box-shadow: 0 8px 24px rgba(255,107,53,0.3);
}
.step-content h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.step-content p { font-size: 14px; color: var(--text-light); line-height: 1.8; margin-bottom: 16px; }
.step-link {
  color: var(--primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: gap 0.2s;
}
.step-link:hover { text-decoration: underline; }

/* FAQ */
.faq { background: var(--bg-soft); }
.faq-grid { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all 0.3s;
}
.faq-item:hover { border-color: rgba(255,107,53,0.3); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}
.faq-arrow {
  font-size: 20px;
  color: var(--primary);
  transition: transform 0.3s;
  flex-shrink: 0;
}
.faq-item.open .faq-arrow { transform: rotate(45deg); }
.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: all 0.3s;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
}
.faq-item.open .faq-a { max-height: 200px; padding: 0 24px 18px; }

/* CTA区 */
.cta { background: var(--bg); padding: 80px 0; }
.cta-card {
  background: linear-gradient(135deg, #1a1a2e, #16213e);
  border-radius: 24px;
  padding: 80px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(255,107,53,0.15), transparent 60%),
              radial-gradient(circle at 70% 50%, rgba(255,179,71,0.1), transparent 60%);
}
.cta-content { position: relative; z-index: 1; }
.cta-content h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 900; color: #fff; margin-bottom: 16px; line-height: 1.2; }
.cta-content p { color: rgba(255,255,255,0.6); font-size: 16px; margin-bottom: 40px; }
.cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.btn-cta-primary {
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  border-radius: 12px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  transition: all 0.3s;
  box-shadow: 0 8px 24px rgba(255,107,53,0.3);
}
.btn-cta-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(255,107,53,0.4); }
.btn-cta-secondary {
  padding: 16px 40px;
  border: 2px solid rgba(255,255,255,0.3);
  color: #fff;
  border-radius: 12px;
  text-decoration: none;
  font-size: 16px;
  font-weight: 700;
  transition: all 0.3s;
}
.btn-cta-secondary:hover { border-color: #fff; background: rgba(255,255,255,0.1); }

/* Footer */
.footer { background: var(--secondary); padding: 60px 0 0; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo .logo-name { color: #fff; }
.footer-brand p { color: rgba(255,255,255,0.5); font-size: 14px; line-height: 1.7; margin: 16px 0; }
.footer-keywords { font-size: 12px; color: rgba(255,255,255,0.3); line-height: 2; }
.footer-col h4 { color: #fff; font-size: 15px; font-weight: 700; margin-bottom: 20px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a { color: rgba(255,255,255,0.5); text-decoration: none; font-size: 14px; transition: color 0.2s; }
.footer-col ul li a:hover { color: var(--primary); }
.footer-bottom { padding: 20px 0; text-align: center; }
.footer-bottom p { color: rgba(255,255,255,0.3); font-size: 12px; }

/* 底部悬浮栏 */
.fixbar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(26,26,46,0.97);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,107,53,0.3);
  padding: 12px 24px;
}
.fixbar-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.fixbar-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}
.logo-svg-sm { width: 24px; height: 24px; }
.fixbar-btns { display: flex; gap: 10px; }
.fbar-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 10px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.fbar-btn svg { width: 16px; height: 16px; }
.fbar-btn.apple { background: rgba(255,255,255,0.1); color: #fff; border: 1px solid rgba(255,255,255,0.2); }
.fbar-btn.apple:hover { background: rgba(255,255,255,0.2); }
.fbar-btn.android { background: var(--primary); color: #fff; }
.fbar-btn.android:hover { background: var(--primary-dark); }
.fixbar-close {
  background: none;
  border: none;
  color: rgba(255,255,255,0.4);
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  transition: color 0.2s;
}
.fixbar-close:hover { color: #fff; }

/* 响应式 */
@media (max-width: 1024px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-card.large, .feature-card.large-right { grid-column: span 1; }
  .security-inner { grid-template-columns: 1fr; gap: 48px; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .topbar { font-size: 11px; }
  .navbar { margin-top: 36px; }
  .nav-links { display: none; }
  .nav-btns { display: none; }
  .nav-toggle { display: block; }
  .hero-content { grid-template-columns: 1fr; }
  .hero-right { display: none; }
  .hero { padding: 120px 0 60px; }
  .hero-stats { gap: 16px; }
  .download-grid { grid-template-columns: 1fr; }
  .guide-steps { grid-template-columns: 1fr; }
  .guide-steps::before { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .cta-card { padding: 48px 24px; }
  .fixbar-logo span { display: none; }
  .features-grid { grid-template-columns: 1fr; }
  .security-cards { grid-template-columns: 1fr; }
}