/* ===== 全局重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: #0a0e1a;
  color: #e2e8f0;
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

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

/* ===== 公告栏 ===== */
.notice-bar {
  background: linear-gradient(90deg, #1a1a2e, #16213e, #0f3460);
  color: #fbbf24;
  text-align: center;
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
  border-bottom: 1px solid rgba(251,191,36,0.2);
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 36px;
  left: 0; right: 0;
  z-index: 1000;
  background: rgba(10,14,26,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: top 0.3s, background 0.3s;
}
.navbar.scrolled { top: 0; background: rgba(10,14,26,0.97); }
.nav-container {
  display: flex;
  align-items: center;
  height: 64px;
  gap: 24px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: #94a3b8;
  font-size: 14px;
  padding: 6px 12px;
  border-radius: 6px;
  transition: all 0.2s;
  white-space: nowrap;
}
.nav-links a:hover { color: #00d4aa; background: rgba(0,212,170,0.08); }
.nav-actions { display: flex; gap: 10px; flex-shrink: 0; }
.btn-download {
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-download:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(0,212,170,0.4); }
.btn-register {
  background: linear-gradient(135deg, #7c3aed, #5b21b6);
  color: #fff;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s;
  white-space: nowrap;
}
.btn-register:hover { transform: translateY(-1px); box-shadow: 0 4px 16px rgba(124,58,237,0.4); }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; }
.hamburger span { display: block; width: 22px; height: 2px; background: #94a3b8; border-radius: 2px; transition: all 0.3s; }
.mobile-menu {
  display: none;
  flex-direction: column;
  background: rgba(10,14,26,0.98);
  padding: 16px 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.mobile-menu a { color: #94a3b8; padding: 12px 0; font-size: 15px; border-bottom: 1px solid rgba(255,255,255,0.04); }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu .mobile-btn {
  margin-top: 12px;
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  text-align: center;
  padding: 12px;
  border-radius: 8px;
  font-weight: 600;
  border-bottom: none;
}
.mobile-menu.open { display: flex; }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 160px 0 0;
  overflow: hidden;
  background: linear-gradient(180deg, #0a0e1a 0%, #0f172a 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 70% 40%, rgba(0,212,170,0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 20% 60%, rgba(124,58,237,0.10) 0%, transparent 70%);
  pointer-events: none;
}
.hero-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  padding-bottom: 60px;
}
.hero-badge {
  display: inline-block;
  background: rgba(0,212,170,0.12);
  color: #00d4aa;
  border: 1px solid rgba(0,212,170,0.25);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}
.hero-title {
  font-size: clamp(32px, 4vw, 52px);
  font-weight: 900;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 12px;
}
.hero-sub {
  font-size: 18px;
  color: #00d4aa;
  font-weight: 500;
  margin-bottom: 16px;
}
.hero-desc {
  font-size: 15px;
  color: #94a3b8;
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-btns { display: flex; gap: 14px; margin-bottom: 40px; flex-wrap: wrap; }
.btn-primary {
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  display: inline-block;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(0,212,170,0.4); }
.btn-outline {
  background: transparent;
  color: #7c3aed;
  border: 2px solid #7c3aed;
  padding: 10px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.2s;
  display: inline-block;
}
.btn-outline:hover { background: rgba(124,58,237,0.1); transform: translateY(-2px); }
.hero-stats { display: flex; gap: 0; align-items: center; }
.stat-item { text-align: center; padding: 0 24px; }
.stat-item:first-child { padding-left: 0; }
.stat-num { display: block; font-size: 22px; font-weight: 800; color: #fff; }
.stat-label { display: block; font-size: 12px; color: #64748b; margin-top: 2px; }
.stat-divider { width: 1px; height: 40px; background: rgba(255,255,255,0.1); }

/* 手机模型 */
.hero-phone-wrap { position: relative; display: flex; justify-content: center; }
.phone-glow {
  position: absolute;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(0,212,170,0.2) 0%, transparent 70%);
  top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  pointer-events: none;
}
.phone-mockup {
  width: 280px;
  background: linear-gradient(145deg, #1e293b, #0f172a);
  border-radius: 32px;
  border: 2px solid rgba(255,255,255,0.1);
  overflow: hidden;
  box-shadow: 0 40px 80px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.05);
  position: relative;
  z-index: 1;
}
.phone-screen { padding: 24px 20px; }
.phone-header { margin-bottom: 20px; }
.phone-title { display: block; font-size: 12px; color: #64748b; margin-bottom: 4px; }
.phone-balance-label { display: block; font-size: 11px; color: #64748b; }
.phone-balance { display: block; font-size: 28px; font-weight: 800; color: #fff; margin: 4px 0; }
.phone-change { display: block; font-size: 13px; color: #00d4aa; font-weight: 500; }
.phone-coins { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.coin-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: rgba(255,255,255,0.04);
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.06);
}
.coin-icon {
  width: 28px; height: 28px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700; color: #fff;
  flex-shrink: 0;
}
.coin-icon.btc { background: #f7931a; }
.coin-icon.eth { background: #627eea; }
.coin-icon.sol { background: #9945ff; }
.coin-icon.bnb { background: #f0b90b; color: #000; }
.coin-name { font-size: 13px; font-weight: 600; color: #e2e8f0; flex: 1; }
.coin-price { font-size: 13px; font-weight: 600; color: #fff; }
.coin-change { font-size: 11px; font-weight: 600; min-width: 50px; text-align: right; }
.coin-change.up { color: #00d4aa; }
.coin-change.down { color: #f87171; }
.phone-actions { display: flex; gap: 8px; }
.phone-btn {
  flex: 1;
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  text-align: center;
  padding: 8px 4px;
  border-radius: 8px;
  font-size: 12px;
  font-weight: 600;
  transition: all 0.2s;
}
.phone-btn:hover { opacity: 0.85; }

/* 行情滚动条 */
.ticker-bar {
  background: rgba(255,255,255,0.03);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 12px 0;
  overflow: hidden;
  white-space: nowrap;
}
.ticker-track {
  display: inline-flex;
  gap: 48px;
  animation: ticker 30s linear infinite;
}
.ticker-track span { font-size: 13px; color: #64748b; }
.ticker-track em { font-style: normal; color: #00d4aa; font-weight: 600; margin-left: 6px; }
@keyframes ticker { 0% { transform: translateX(0); } 100% { transform: translateX(-50%); } }

/* ===== 区块通用 ===== */
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  background: rgba(0,212,170,0.1);
  color: #00d4aa;
  border: 1px solid rgba(0,212,170,0.2);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
  line-height: 1.3;
}
.section-desc { font-size: 15px; color: #64748b; max-width: 600px; margin: 0 auto; line-height: 1.8; }
.section-header.light .section-title { color: #fff; }

/* ===== 下载区 ===== */
.download-section { padding: 100px 0; background: #0f172a; }
.download-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
.dl-card {
  background: #1e293b;
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 20px;
  padding: 36px 28px;
  transition: all 0.3s;
  position: relative;
  overflow: hidden;
}
.dl-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, rgba(0,212,170,0.5), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.dl-card:hover { transform: translateY(-6px); border-color: rgba(0,212,170,0.2); box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.dl-card:hover::before { opacity: 1; }
.dl-card.featured {
  border-color: rgba(0,212,170,0.3);
  background: linear-gradient(145deg, #1e293b, #162032);
  box-shadow: 0 0 40px rgba(0,212,170,0.08);
}
.dl-card.featured::before { opacity: 1; background: linear-gradient(90deg, #00d4aa, #7c3aed); }
.featured-badge {
  position: absolute;
  top: 20px; right: 20px;
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
}
.dl-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 20px;
}
.android-icon { background: linear-gradient(135deg, #3ddc84, #00a854); }
.ios-icon { background: linear-gradient(135deg, #555, #222); }
.pc-icon { background: linear-gradient(135deg, #0078d4, #005a9e); }
.dl-icon svg { width: 28px; height: 28px; color: #fff; }
.dl-card h3 { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.dl-card p { font-size: 14px; color: #64748b; line-height: 1.7; margin-bottom: 20px; }
.dl-features { margin-bottom: 28px; }
.dl-features li { font-size: 13px; color: #94a3b8; padding: 4px 0; }
.btn-dl {
  display: block;
  text-align: center;
  padding: 12px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.btn-dl.android { background: linear-gradient(135deg, #3ddc84, #00a854); color: #fff; }
.btn-dl.ios { background: linear-gradient(135deg, #555, #222); color: #fff; border: 1px solid rgba(255,255,255,0.1); }
.btn-dl.pc { background: linear-gradient(135deg, #0078d4, #005a9e); color: #fff; }
.btn-dl:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.3); }
.install-tip {
  text-align: center;
  font-size: 14px;
  color: #64748b;
}
.install-tip a { color: #00d4aa; margin-left: 8px; text-decoration: underline; }

/* ===== 核心功能 ===== */
.features-section { padding: 100px 0; background: #0a0e1a; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: #1e293b;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 20px;
  padding: 32px 28px;
  transition: all 0.3s;
}
.feature-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.12); box-shadow: 0 16px 48px rgba(0,0,0,0.3); }
.feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature-card h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.feature-card p { font-size: 14px; color: #64748b; line-height: 1.8; }

/* ===== 为何选择 ===== */
.why-section { padding: 100px 0; background: #0f172a; }
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 60px;
}
.why-card {
  background: #1e293b;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 20px;
  padding: 32px 28px;
  transition: all 0.3s;
  position: relative;
}
.why-card:hover { transform: translateY(-4px); border-color: rgba(0,212,170,0.15); }
.why-num {
  font-size: 48px;
  font-weight: 900;
  color: rgba(0,212,170,0.12);
  line-height: 1;
  margin-bottom: 12px;
  font-variant-numeric: tabular-nums;
}
.why-card h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.why-card p { font-size: 14px; color: #64748b; line-height: 1.8; }

/* 数据统计 */
.stats-bar {
  display: flex;
  justify-content: space-around;
  align-items: center;
  background: linear-gradient(135deg, #1e293b, #162032);
  border: 1px solid rgba(0,212,170,0.15);
  border-radius: 20px;
  padding: 40px 32px;
  gap: 16px;
  flex-wrap: wrap;
}
.stats-item { text-align: center; }
.stats-num {
  display: block;
  font-size: 36px;
  font-weight: 900;
  color: #fff;
  line-height: 1;
  margin-bottom: 8px;
}
.stats-num em { font-style: normal; font-size: 20px; color: #00d4aa; }
.stats-label { font-size: 13px; color: #64748b; }

/* ===== 使用指南 ===== */
.guide-section { padding: 100px 0; background: #0a0e1a; }
.guide-steps {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 48px;
}
.step-card {
  flex: 1;
  background: #1e293b;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 20px;
  padding: 36px 28px;
  text-align: center;
  transition: all 0.3s;
}
.step-card:hover { border-color: rgba(0,212,170,0.2); transform: translateY(-4px); }
.step-num {
  display: inline-block;
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  width: 36px; height: 36px;
  border-radius: 50%;
  line-height: 36px;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 16px;
}
.step-icon { font-size: 40px; margin-bottom: 16px; }
.step-card h3 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.step-card p { font-size: 14px; color: #64748b; line-height: 1.8; margin-bottom: 24px; }
.step-btn {
  display: inline-block;
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.step-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(0,212,170,0.3); }
.step-arrow { font-size: 28px; color: rgba(0,212,170,0.4); flex-shrink: 0; }
.guide-extra {
  background: linear-gradient(135deg, rgba(0,212,170,0.06), rgba(124,58,237,0.06));
  border: 1px solid rgba(0,212,170,0.15);
  border-radius: 16px;
  padding: 28px 32px;
}
.guide-extra-inner { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.guide-extra-icon { font-size: 36px; flex-shrink: 0; }
.guide-extra-text { flex: 1; }
.guide-extra-text h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 6px; }
.guide-extra-text p { font-size: 14px; color: #64748b; }
.guide-extra-btn {
  background: linear-gradient(135deg, #7c3aed, #5b21b6);
  color: #fff;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s;
}
.guide-extra-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 16px rgba(124,58,237,0.3); }

/* ===== 关于区块 ===== */
.about-section { padding: 100px 0; background: #0f172a; }
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-left h2 { font-size: clamp(28px, 3vw, 40px); font-weight: 800; color: #fff; margin: 16px 0 20px; line-height: 1.3; }
.highlight { color: #00d4aa; }
.about-left p { font-size: 15px; color: #64748b; line-height: 1.8; margin-bottom: 16px; }
.about-tags { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0 32px; }
.about-tags span {
  background: rgba(0,212,170,0.1);
  color: #00d4aa;
  border: 1px solid rgba(0,212,170,0.2);
  padding: 5px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
}
.about-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.about-card {
  background: #1e293b;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 24px 20px;
  transition: all 0.3s;
}
.about-card:hover { border-color: rgba(0,212,170,0.15); transform: translateY(-3px); }
.about-card-icon { font-size: 28px; margin-bottom: 12px; }
.about-card h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.about-card p { font-size: 13px; color: #64748b; line-height: 1.7; }

/* ===== FAQ ===== */
.faq-section { padding: 100px 0; background: #0a0e1a; }
.faq-grid { max-width: 800px; margin: 0 auto 40px; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: #1e293b;
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.faq-item.active { border-color: rgba(0,212,170,0.2); }
.faq-q {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}
.faq-q span { font-size: 15px; font-weight: 600; color: #e2e8f0; }
.faq-arrow { color: #00d4aa; font-size: 12px; transition: transform 0.3s; flex-shrink: 0; }
.faq-item.active .faq-arrow { transform: rotate(180deg); }
.faq-a { display: none; padding: 0 24px 20px; }
.faq-item.active .faq-a { display: block; }
.faq-a p { font-size: 14px; color: #64748b; line-height: 1.8; }
.faq-contact { text-align: center; }
.faq-contact p { font-size: 15px; color: #64748b; margin-bottom: 16px; }

/* ===== 社区 ===== */
.community-section { padding: 100px 0; background: #0f172a; }
.community-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.community-text h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 800; color: #fff; margin: 16px 0 20px; }
.community-text p { font-size: 15px; color: #64748b; line-height: 1.8; margin-bottom: 16px; }
.social-links { display: flex; gap: 12px; margin-top: 24px; flex-wrap: wrap; }
.social-btn {
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.2s;
}
.social-btn.telegram { background: #0088cc; color: #fff; }
.social-btn.twitter { background: #1da1f2; color: #fff; }
.social-btn.discord { background: #5865f2; color: #fff; }
.social-btn:hover { transform: translateY(-2px); opacity: 0.9; }
.cta-card {
  background: linear-gradient(145deg, #1e293b, #162032);
  border: 1px solid rgba(0,212,170,0.2);
  border-radius: 24px;
  padding: 48px 40px;
  text-align: center;
}
.cta-card h3 { font-size: 26px; font-weight: 800; color: #fff; margin-bottom: 16px; line-height: 1.3; }
.cta-card p { font-size: 14px; color: #64748b; line-height: 1.7; margin-bottom: 28px; }
.btn-large { padding: 14px 36px; font-size: 16px; display: block; margin-bottom: 12px; text-align: center; }
.btn-outline.btn-large { border-color: rgba(255,255,255,0.2); color: #94a3b8; }
.btn-outline.btn-large:hover { border-color: #00d4aa; color: #00d4aa; background: rgba(0,212,170,0.06); }

/* ===== 底部悬浮栏 ===== */
.fixed-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 999;
  background: linear-gradient(90deg, #0f172a, #1e293b);
  border-top: 1px solid rgba(0,212,170,0.2);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 -8px 32px rgba(0,0,0,0.4);
}
.fixed-bar-left { display: flex; align-items: center; gap: 12px; flex: 1; }
.fixed-bar-info strong { display: block; font-size: 14px; color: #fff; font-weight: 700; }
.fixed-bar-info span { font-size: 12px; color: #64748b; }
.fixed-bar-right { display: flex; gap: 10px; align-items: center; }
.fbar-btn {
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s;
  white-space: nowrap;
}
.fbar-btn.ios-btn { background: linear-gradient(135deg, #555, #222); color: #fff; border: 1px solid rgba(255,255,255,0.1); }
.fbar-btn.android-btn { background: linear-gradient(135deg, #3ddc84, #00a854); color: #fff; }
.fbar-btn.guide-btn { background: linear-gradient(135deg, #7c3aed, #5b21b6); color: #fff; }
.fbar-btn:hover { transform: translateY(-1px); opacity: 0.9; }
.fixed-bar-close { color: #64748b; cursor: pointer; font-size: 16px; padding: 4px; flex-shrink: 0; }
.fixed-bar-close:hover { color: #fff; }

/* ===== Footer ===== */
.footer { background: #070b14; padding: 80px 0 0; border-top: 1px solid rgba(255,255,255,0.05); }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 60px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand p { font-size: 14px; color: #475569; line-height: 1.8; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px; height: 36px;
  background: rgba(255,255,255,0.06);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  transition: all 0.2s;
}
.footer-social a:hover { background: rgba(0,212,170,0.15); transform: translateY(-2px); }
.footer-links h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 20px; }
.footer-links ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links li a { font-size: 13px; color: #475569; transition: color 0.2s; line-height: 1.5; }
.footer-links li a:hover { color: #00d4aa; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.05);
  padding: 24px 0;
  text-align: center;
}
.footer-bottom p { font-size: 12px; color: #334155; line-height: 1.8; }
.footer-disclaimer { margin-top: 6px; color: #1e293b; }

/* ===== 回顶部 ===== */
.back-top {
  position: fixed;
  bottom: 80px; right: 24px;
  width: 40px; height: 40px;
  background: linear-gradient(135deg, #00d4aa, #00a87e);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  z-index: 998;
  box-shadow: 0 4px 16px rgba(0,212,170,0.3);
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-3px); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-container { grid-template-columns: 1fr; gap: 40px; }
  .hero-right { display: none; }
  .download-cards { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto 32px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .community-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions { display: none; }
  .hamburger { display: flex; }
  .hero { padding: 120px 0 0; }
  .features-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .guide-steps { flex-direction: column; }
  .step-arrow { transform: rotate(90deg); }
  .about-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .fixed-bar { flex-wrap: wrap; }
  .fixed-bar-right { width: 100%; justify-content: center; }
  .stats-bar { gap: 24px; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 28px; }
  .hero-btns { flex-direction: column; }
  .hero-stats { flex-wrap: wrap; justify-content: center; gap: 16px; }
  .stat-divider { display: none; }
  .guide-extra-inner { flex-direction: column; text-align: center; }
}