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

:root {
  --primary: #00c076;
  --primary-dark: #00a865;
  --bg-dark: #0b0e11;
  --bg-card: #161a1e;
  --bg-section: #12161a;
  --text-primary: #eaecef;
  --text-secondary: #848e9c;
  --border: #2b3139;
  --accent: #f0b90b;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 15px;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--accent);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
.site-header {
  background: rgba(11, 14, 17, 0.95);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo img {
  width: 32px;
  height: 32px;
}

.nav-menu {
  display: flex;
  gap: 28px;
  list-style: none;
}

.nav-menu a {
  color: var(--text-secondary);
  font-size: 14px;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-primary);
}

.header-actions {
  display: flex;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
}

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

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.btn-lg {
  padding: 14px 32px;
  font-size: 16px;
}

/* Hero */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, #12161a 0%, var(--bg-dark) 100%);
}

.hero-content {
  max-width: 720px;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 17px;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.hero-update {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Sections */
.section {
  padding: 60px 0;
}

.section-alt {
  background: var(--bg-section);
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 40px;
  font-size: 15px;
}

/* Download Cards */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.download-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 32px;
}

.download-card h3 {
  font-size: 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.download-card ul {
  list-style: none;
}

.download-card li {
  padding: 8px 0;
  color: var(--text-secondary);
  font-size: 14px;
  border-bottom: 1px solid var(--border);
}

.download-card li:last-child {
  border-bottom: none;
}

.download-card li::before {
  content: "✓";
  color: var(--primary);
  margin-right: 8px;
}

.platform-icon {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.icon-ios {
  background: #333;
  color: #fff;
}

.icon-android {
  background: var(--primary);
  color: #fff;
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}

.feature-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}

.feature-card ul {
  list-style: none;
}

.feature-card li {
  color: var(--text-secondary);
  font-size: 13px;
  padding: 4px 0;
}

.feature-card li::before {
  content: "•";
  color: var(--primary);
  margin-right: 8px;
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.step-card {
  text-align: center;
}

.step-num {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin: 0 auto 16px;
}

.step-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
}

.step-card ul {
  list-style: none;
  text-align: left;
}

.step-card li {
  color: var(--text-secondary);
  font-size: 14px;
  padding: 6px 0;
}

.step-card li::before {
  content: "—";
  color: var(--primary);
  margin-right: 8px;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
  text-align: center;
}

.stat-item .stat-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
}

.stat-item .stat-label {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 4px;
}

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

/* News / Auto Update */
.news-section {
  padding: 50px 0;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  transition: border-color 0.2s;
}

.news-card:hover {
  border-color: var(--primary);
}

.news-date {
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 8px;
}

.news-card h3 {
  font-size: 16px;
  margin-bottom: 10px;
  line-height: 1.4;
}

.news-card h3 a {
  color: var(--text-primary);
}

.news-card h3 a:hover {
  color: var(--primary);
}

.news-card p {
  color: var(--text-secondary);
  font-size: 13px;
  line-height: 1.6;
}

.news-badge {
  display: inline-block;
  background: rgba(0, 192, 118, 0.15);
  color: var(--primary);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 8px;
}

/* Footer */
.site-footer {
  background: var(--bg-section);
  border-top: 1px solid var(--border);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  margin-bottom: 32px;
}

.footer-col h4 {
  font-size: 14px;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 8px;
}

.footer-col a {
  color: var(--text-secondary);
  font-size: 13px;
}

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

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}

/* Article Page */
.article-header {
  padding: 60px 0 30px;
  background: var(--bg-section);
}

.article-header h1 {
  font-size: 32px;
  line-height: 1.4;
  margin-bottom: 16px;
}

.article-meta {
  color: var(--text-secondary);
  font-size: 13px;
}

.article-body {
  padding: 40px 0 60px;
  max-width: 800px;
}

.article-body h2 {
  font-size: 22px;
  margin: 32px 0 16px;
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 18px;
  margin: 24px 0 12px;
}

.article-body p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 15px;
  line-height: 1.8;
}

.article-body ul,
.article-body ol {
  color: var(--text-secondary);
  margin-bottom: 16px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
  line-height: 1.7;
}

.article-nav {
  padding: 20px 0;
  border-top: 1px solid var(--border);
  margin-top: 40px;
}

/* Download Page */
.download-hero {
  padding: 60px 0;
  text-align: center;
}

.download-hero h1 {
  font-size: 36px;
  margin-bottom: 16px;
}

.download-platforms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 40px;
}

.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px 28px;
  text-align: center;
}

.platform-card .platform-icon-lg {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  margin: 0 auto 20px;
}

.platform-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.platform-card .version {
  color: var(--text-secondary);
  font-size: 13px;
  margin-bottom: 20px;
}

.platform-card ul {
  list-style: none;
  text-align: left;
  margin-bottom: 24px;
}

.platform-card li {
  color: var(--text-secondary);
  font-size: 13px;
  padding: 6px 0;
}

.platform-card li::before {
  content: "✓";
  color: var(--primary);
  margin-right: 8px;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .hero h1 {
    font-size: 28px;
  }

  .section-title {
    font-size: 22px;
  }

  .header-actions .btn-outline {
    display: none;
  }
}