/* ===== 炒币软件APP下载排行榜 - 全局样式 ===== */
:root {
  --bg-dark: #0a0f18;
  --bg-card: #111827;
  --gold: #d4a017;
  --gold-light: #f0c040;
  --blue: #1e40af;
  --blue-light: #3b82f6;
  --green: #059669;
  --green-light: #10b981;
  --white: #ffffff;
  --text: #e2e8f0;
  --text-dim: #94a3b8;
  --border: #1e293b;
  --radius: 12px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ===== 导航栏 ===== */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(10, 15, 24, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.nav-brand {
  font-size: 1.3rem; font-weight: 700;
  color: var(--gold); text-decoration: none;
  display: flex; align-items: center; gap: 8px;
}
.nav-brand .icon { font-size: 1.5rem; }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a {
  color: var(--text-dim); text-decoration: none;
  font-size: 0.95rem; font-weight: 500;
  transition: var(--transition); position: relative;
}
.nav-links a:hover, .nav-links a.active { color: var(--gold); }
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--gold);
  transition: var(--transition);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-toggle { display: none; background: none; border: none; color: var(--gold); font-size: 1.5rem; cursor: pointer; }

/* ===== Hero ===== */
.hero {
  padding: 100px 24px 80px; text-align: center;
  background: linear-gradient(135deg, #0a0f18 0%, #111f3a 50%, #0a1a28 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(212, 160, 23, 0.06) 0%, transparent 50%),
              radial-gradient(circle at 70% 30%, rgba(30, 64, 175, 0.08) 0%, transparent 50%);
  animation: heroGlow 8s ease-in-out infinite alternate;
}
@keyframes heroGlow {
  0% { transform: scale(1); opacity: 0.6; }
  100% { transform: scale(1.1); opacity: 1; }
}
.hero-content { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
.hero-badge {
  display: inline-block; padding: 6px 20px;
  background: rgba(212, 160, 23, 0.12); border: 1px solid rgba(212, 160, 23, 0.3);
  border-radius: 50px; color: var(--gold); font-size: 0.9rem; font-weight: 600;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 2.8rem; font-weight: 800; color: var(--white);
  line-height: 1.3; margin-bottom: 16px;
}
.hero h1 .highlight { color: var(--gold); }
.hero p { font-size: 1.1rem; color: var(--text-dim); max-width: 600px; margin: 0 auto 20px; }
.hero-tags { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-bottom: 32px; }
.hero-tags span {
  padding: 8px 16px; background: rgba(255,255,255,0.05);
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 0.85rem; color: var(--text-dim);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-block; padding: 14px 36px;
  font-size: 1rem; font-weight: 700; text-decoration: none;
  border-radius: 50px; transition: var(--transition); cursor: pointer;
  border: none; position: relative; overflow: hidden;
}
.btn-primary {
  background: linear-gradient(135deg, var(--gold), var(--gold-light));
  color: #0a0f18; box-shadow: 0 4px 20px rgba(212, 160, 23, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 28px rgba(212, 160, 23, 0.45); }
.btn-secondary {
  background: transparent; color: var(--gold); border: 2px solid var(--gold);
}
.btn-secondary:hover { background: rgba(212, 160, 23, 0.08); }
.btn-pulse { animation: pulse 2s infinite; }
@keyframes pulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(212, 160, 23, 0.3); }
  50% { box-shadow: 0 4px 40px rgba(212, 160, 23, 0.6), 0 0 80px rgba(212, 160, 23, 0.2); }
}
.btn-download {
  background: linear-gradient(135deg, var(--green), #34d399);
  color: #fff; font-size: 1rem; padding: 12px 28px;
  box-shadow: 0 4px 16px rgba(5, 150, 105, 0.35);
}
.btn-download:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(5, 150, 105, 0.5); }

/* ===== 通用 Section ===== */
.section { padding: 80px 24px; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-header h2 {
  font-size: 2rem; font-weight: 700; color: var(--white); margin-bottom: 12px;
}
.section-header .divider {
  width: 60px; height: 3px; background: var(--gold);
  margin: 0 auto 16px; border-radius: 2px;
}
.section-header p { color: var(--text-dim); font-size: 1.05rem; }
.container { max-width: 1200px; margin: 0 auto; }

/* ===== 特性卡片 ===== */
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 28px; max-width: 1200px; margin: 0 auto;
}
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 36px 28px;
  transition: var(--transition);
  opacity: 0; transform: translateY(30px);
}
.feature-card.revealed { opacity: 1; transform: translateY(0); }
.feature-card:hover { border-color: var(--gold); transform: translateY(-4px); box-shadow: 0 8px 32px rgba(0,0,0,0.3); }
.feature-card .icon-box {
  width: 56px; height: 56px; border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 20px;
}
.feature-card .icon-gold { background: rgba(212, 160, 23, 0.12); color: var(--gold); }
.feature-card .icon-blue { background: rgba(30, 64, 175, 0.15); color: var(--blue-light); }
.feature-card .icon-green { background: rgba(5, 150, 105, 0.12); color: var(--green-light); }
.feature-card h3 { font-size: 1.2rem; color: var(--white); margin-bottom: 10px; font-weight: 700; }
.feature-card p { color: var(--text-dim); font-size: 0.95rem; line-height: 1.7; }

/* ===== 排行榜 ===== */
.ranking-section { background: var(--bg-card); padding: 80px 24px; }
.ranking-table {
  max-width: 1000px; margin: 0 auto;
  border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden;
}
.ranking-header {
  display: grid; grid-template-columns: 80px 2fr 1fr 1.5fr;
  padding: 16px 20px; background: rgba(212, 160, 23, 0.08);
  border-bottom: 1px solid var(--border);
  font-weight: 700; color: var(--gold); font-size: 0.85rem; text-transform: uppercase;
}
.ranking-row {
  display: grid; grid-template-columns: 80px 2fr 1fr 1.5fr;
  padding: 18px 20px; align-items: center; border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.ranking-row:hover { background: rgba(255,255,255,0.02); }
.ranking-row:last-child { border-bottom: none; }
.rank-num {
  font-size: 1.4rem; font-weight: 800; color: var(--gold);
}
.rank-name { font-weight: 700; color: var(--white); }
.rank-stars { color: var(--gold); font-size: 0.9rem; }
.rank-desc { color: var(--text-dim); font-size: 0.85rem; }
.rank-top1 { background: linear-gradient(90deg, rgba(212,160,23,0.08) 0%, transparent 100%); }
.rank-top1 .rank-num { font-size: 1.6rem; }

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #111f3a 0%, #0a1a28 100%);
  padding: 80px 24px; text-align: center;
}
.cta-section h2 { font-size: 2rem; color: var(--white); margin-bottom: 12px; }
.cta-section p { color: var(--text-dim); margin-bottom: 28px; font-size: 1.05rem; }

/* ===== 时间线 (about) ===== */
.timeline { max-width: 800px; margin: 0 auto; position: relative; padding-left: 40px; }
.timeline::before {
  content: ''; position: absolute; left: 15px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(to bottom, var(--gold), var(--blue), var(--green));
}
.timeline-item { margin-bottom: 40px; position: relative; opacity: 0; transform: translateX(-20px); transition: 0.6s ease; }
.timeline-item.revealed { opacity: 1; transform: translateX(0); }
.timeline-item::before {
  content: ''; position: absolute; left: -33px; top: 4px;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--gold); border: 3px solid var(--bg-card);
}
.timeline-year {
  font-size: 0.85rem; color: var(--gold); font-weight: 700; margin-bottom: 4px;
}
.timeline-title { font-size: 1.15rem; color: var(--white); font-weight: 700; margin-bottom: 6px; }
.timeline-desc { color: var(--text-dim); font-size: 0.95rem; }

/* ===== 团队卡片 ===== */
.team-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 28px; max-width: 1000px; margin: 0 auto;
}
.team-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px 24px; text-align: center;
  transition: var(--transition);
}
.team-card:hover { border-color: var(--gold); transform: translateY(-4px); }
.team-card img { width: 100px; height: 100px; border-radius: 50%; object-fit: cover; margin-bottom: 16px; border: 3px solid var(--gold); }
.team-card h4 { color: var(--white); font-weight: 700; margin-bottom: 4px; }
.team-card .role { color: var(--gold); font-size: 0.85rem; margin-bottom: 10px; }
.team-card p { color: var(--text-dim); font-size: 0.85rem; }

/* ===== 服务详情卡片 ===== */
.service-detail {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  align-items: center; margin-bottom: 80px;
}
.service-detail.reverse { direction: rtl; }
.service-detail.reverse .service-text { direction: ltr; }
.service-detail img { width: 100%; border-radius: var(--radius); }
.service-text h3 { font-size: 1.5rem; color: var(--white); margin-bottom: 16px; font-weight: 700; }
.service-text h3 span { color: var(--gold); }
.service-text p { color: var(--text-dim); margin-bottom: 12px; line-height: 1.8; }
.service-text .feature-list { list-style: none; margin-bottom: 20px; }
.service-text .feature-list li {
  padding: 6px 0; color: var(--text-dim); font-size: 0.95rem;
}
.service-text .feature-list li::before {
  content: '✓ '; color: var(--green-light); font-weight: 700;
}

/* ===== FAQ ===== */
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-search {
  width: 100%; padding: 14px 20px; font-size: 1rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); color: var(--white); margin-bottom: 32px;
  outline: none;
}
.faq-search:focus { border-color: var(--gold); }
.faq-category { margin-bottom: 32px; }
.faq-category h3 {
  font-size: 1.2rem; color: var(--gold); margin-bottom: 16px;
  padding-bottom: 8px; border-bottom: 1px solid var(--border);
}
details {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 10px; margin-bottom: 10px; overflow: hidden;
  transition: var(--transition);
}
details:hover { border-color: var(--gold); }
details summary {
  padding: 18px 24px; font-weight: 600; color: var(--white);
  cursor: pointer; list-style: none; display: flex; justify-content: space-between;
  align-items: center; font-size: 1rem;
}
details summary::after {
  content: '+'; font-size: 1.3rem; color: var(--gold); font-weight: 700;
  transition: transform 0.3s;
}
details[open] summary::after { content: '−'; transform: rotate(180deg); }
details .faq-answer { padding: 0 24px 20px; color: var(--text-dim); line-height: 1.8; font-size: 0.95rem; }

/* ===== 联系表单 ===== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 40px;
  max-width: 1000px; margin: 0 auto;
}
.contact-info h3 { font-size: 1.3rem; color: var(--white); margin-bottom: 20px; }
.contact-info-item {
  display: flex; gap: 12px; align-items: flex-start; margin-bottom: 16px;
  padding: 14px; background: var(--bg-card); border-radius: 10px; border: 1px solid var(--border);
}
.contact-info-item .info-icon { font-size: 1.2rem; color: var(--gold); flex-shrink: 0; margin-top: 2px; }
.contact-info-item .info-text h4 { color: var(--white); font-size: 0.9rem; margin-bottom: 2px; }
.contact-info-item .info-text p { color: var(--text-dim); font-size: 0.85rem; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; color: var(--text-dim); font-size: 0.9rem; margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 14px 16px; font-size: 0.95rem;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 10px; color: var(--white); outline: none;
  font-family: inherit; transition: var(--transition);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--gold); }
.form-group textarea { min-height: 140px; resize: vertical; }
.form-submit { width: 100%; padding: 14px; font-size: 1rem; }

/* ===== 页脚 ===== */
.site-footer {
  background: #070b13; border-top: 1px solid var(--border);
  padding: 40px 24px; text-align: center;
}
.footer-container {
  max-width: 1200px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 16px;
}
.footer-copyright { color: var(--text-dim); font-size: 0.85rem; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--text-dim); text-decoration: none; font-size: 0.85rem; transition: var(--transition); }
.footer-links a:hover { color: var(--gold); }

/* ===== 安全评级徽章 ===== */
.badge-strip {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin: 20px 0;
}
.badge {
  padding: 8px 18px; border-radius: 50px; font-size: 0.82rem; font-weight: 600;
  border: 1px solid;
}
.badge-gold { border-color: var(--gold); color: var(--gold); background: rgba(212,160,23,0.08); }
.badge-blue { border-color: var(--blue-light); color: var(--blue-light); background: rgba(59,130,246,0.08); }
.badge-green { border-color: var(--green-light); color: var(--green-light); background: rgba(16,185,129,0.08); }

/* ===== about页面安全评级卡片 ===== */
.rating-cards {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; max-width: 1000px; margin: 0 auto;
}
.rating-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; text-align: center;
  transition: var(--transition);
}
.rating-card:hover { border-color: var(--gold); transform: translateY(-4px); }
.rating-card .rating-score { font-size: 2.5rem; font-weight: 800; color: var(--gold); }
.rating-card h4 { color: var(--white); margin: 10px 0 8px; }
.rating-card p { color: var(--text-dim); font-size: 0.9rem; }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0;
    background: rgba(10,15,24,0.98); flex-direction: column; padding: 20px; gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: block; }
  .hero h1 { font-size: 2rem; }
  .features-grid { grid-template-columns: 1fr; }
  .ranking-header, .ranking-row { grid-template-columns: 50px 1.5fr 0.8fr 1.2fr; font-size: 0.78rem; padding: 12px 10px; }
  .service-detail { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .footer-container { flex-direction: column; text-align: center; }
  .rating-cards { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.6rem; }
  .hero p { font-size: 0.95rem; }
  .section-header h2 { font-size: 1.5rem; }
  .btn { padding: 12px 24px; font-size: 0.9rem; }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in-up { animation: fadeInUp 0.6s ease forwards; }