:root {
  --primary: #06b6d4;
  --primary-light: #ecfeff;
  --primary-dark: #0891b2;
  --download: #10b981;
  --download-dark: #059669;
  --bg: #0b0f19;
  --card: #111827;
  --text: #f3f4f6;
  --muted: #9ca3af;
  --border: #1f2937;
  --border-hover: #374151;
  --soft: #1f2937;
  --yellow: #f59e0b;
  --danger: #ef4444;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  --transition: all 0.3s ease;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto !important;
  margin-right: auto !important;
  padding-left: 20px;
  padding-right: 20px;
}

.site-header {
  background: rgba(11, 15, 25, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.topbar {
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
}

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 22px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-weight: 500;
  font-size: 15px;
  color: var(--muted);
}

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

.header-search {
  max-width: 300px;
  flex: 1;
}

.header-search input {
  width: 100%;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--soft);
  color: #fff;
  outline: none;
  font-size: 14px;
  transition: var(--transition);
}

.header-search input:focus {
  border-color: var(--primary);
  background: var(--bg);
}

.hero {
  background: radial-gradient(circle at 80% 20%, rgba(6, 182, 212, 0.15) 0%, transparent 50%), var(--card);
  border-bottom: 1px solid var(--border);
  padding: 100px 0;
}

.hero-inner {
  max-width: 900px;
  margin: 0;
  text-align: left;
}

.hero h1 {
  margin: 0 0 20px;
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 800;
  letter-spacing: -1.5px;
  line-height: 1.1;
  color: #fff;
}

.hero p {
  margin-bottom: 40px;
  color: var(--muted);
  font-size: clamp(16px, 2.5vw, 20px);
  max-width: 680px;
}

.searchbox {
  display: flex;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px;
  max-width: 600px;
  transition: var(--transition);
}

.searchbox:focus-within {
  border-color: var(--primary);
}

.searchbox input {
  flex: 1;
  border: 0;
  background: transparent;
  padding: 14px 24px;
  font-size: 16px;
  color: #fff;
  outline: none;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
  color: var(--muted);
  font-size: 13px;
}

.chips a {
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--soft);
  border: 1px solid var(--border);
}

.chips a:hover {
  background: var(--primary);
  color: #fff;
  border-color: transparent;
}

.section {
  margin: 48px 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.section-title {
  margin: 0;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  color: #fff;
}

.page-title {
  margin: 0 0 12px;
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -1px;
  color: #fff;
}

.view-more {
  color: var(--primary);
  font-weight: 600;
  font-size: 14px;
}

.view-more:hover {
  color: var(--primary-dark);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 14px 28px;
  font-weight: 700;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

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

.btn-download:hover {
  background: var(--download-dark);
  transform: translateY(-2px);
}

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

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

.muted {
  color: var(--muted);
}

.stars {
  color: var(--yellow);
}

.content-grid {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.main-content {
  order: 2;
  display: grid;
  gap: 32px;
}

.sidebar {
  order: 1;
  display: grid;
  gap: 32px;
  position: sticky;
  top: 112px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 16px;
}

.category {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: var(--transition);
}

.category:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.cat-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 16px;
  border-radius: var(--radius-sm);
  background: var(--soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-size: 22px;
}

.category strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.category span {
  color: var(--muted);
  font-size: 12px;
}

.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}

.app-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.app-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.app-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--soft);
  margin-bottom: 16px;
}

.app-body {
  display: flex;
  flex-direction: column;
  flex: 1;
}

.app-body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
}

.app-meta {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 12px;
}

.app-desc {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
  margin: 0 0 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.app-action {
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  margin-top: auto;
}

.feature-box {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 32px;
  align-items: center;
  background: linear-gradient(135deg, var(--card) 0%, rgba(6, 182, 212, 0.05) 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}

.feature-visual {
  height: 100%;
  min-height: 200px;
  border-radius: var(--radius-md);
  background: var(--bg);
  border: 1px solid var(--border);
  display: grid;
  place-items: center;
}

.big-icon {
  width: 96px;
  height: 96px;
  border-radius: var(--radius-lg);
}

.breadcrumb {
  padding: 32px 0 16px;
  color: var(--muted);
  font-size: 13px;
}

.detail-hero {
  display: flex;
  gap: 32px;
  align-items: center;
}

.detail-icon {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.detail-title {
  margin: 0 0 12px;
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  color: #fff;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table tr {
  border-bottom: 1px solid var(--border);
}

.spec-table tr:last-child {
  border-bottom: 0;
}

.spec-table td {
  padding: 16px 8px;
  font-size: 14px;
}

.spec-table td:first-child {
  color: var(--muted);
  width: 30%;
}

.spec-table td:last-child {
  font-weight: 700;
  color: #fff;
}

details {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  padding: 20px;
  background: var(--card);
}

details[open] {
  border-color: var(--primary);
}

summary {
  cursor: pointer;
  font-weight: 700;
  font-size: 16px;
  outline: none;
  color: #fff;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.article {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.article:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
}

.article-thumb {
  height: 120px;
  background: var(--soft);
  display: grid;
  place-items: center;
  font-size: 36px;
}

.article-body {
  padding: 20px;
}

.article-body h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}

.article-body p {
  color: var(--muted);
  font-size: 13px;
  margin: 0;
}

.rank-list {
  display: grid;
  gap: 12px;
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

.rank-num {
  width: 24px;
  height: 24px;
  background: var(--bg);
  border-radius: 6px;
  color: var(--muted);
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
}

.rank-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
}

.rank-text strong {
  display: block;
  font-size: 13px;
  font-weight: 700;
  color: #fff;
}

.rank-text span {
  color: var(--muted);
  font-size: 11px;
}

.link-list {
  display: grid;
  gap: 8px;
}

.link-list a {
  padding: 12px;
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 14px;
}

.link-list a:hover {
  border-color: var(--primary);
  color: #fff;
}

.notice {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.2);
  color: #fca5a5;
  border-radius: var(--radius-md);
  padding: 20px;
  font-size: 14px;
}

.site-footer {
  margin-top: 80px;
  background: var(--card);
  border-top: 1px solid var(--border);
  padding: 60px 0 40px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col h4 {
  font-size: 14px;
  color: #fff;
  margin: 0 0 20px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.footer-col a {
  display: block;
  margin-bottom: 12px;
  font-size: 14px;
  color: var(--muted);
}

.footer-col a:hover {
  color: #fff;
}

.copyright {
  border-top: 1px solid var(--border);
  padding-top: 30px;
  text-align: center;
  font-size: 13px;
  color: var(--muted);
}

@media (max-width: 1024px) {
  .content-grid {
    grid-template-columns: 1fr;
  }

  .main-content {
    order: 1;
  }

  .sidebar {
    order: 2;
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .topbar {
    height: auto;
    padding: 20px 0;
    flex-direction: column;
    align-items: stretch;
    gap: 16px;
  }

  .nav,
  .header-search {
    display: none;
  }

  .hero {
    padding: 60px 0;
  }

  .searchbox {
    flex-direction: column;
    border-radius: var(--radius-md);
  }

  .searchbox button {
    width: 100%;
  }

  .detail-hero {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
  }

  .feature-box {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .feature-visual {
    max-width: 200px;
    margin: 0 auto;
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }
}