:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-glow: rgba(37, 99, 235, 0.15);
  --download: #059669;
  --download-dark: #047857;
  --download-glow: rgba(5, 150, 105, 0.15);
  --accent: #d97706;
  --bg: #0b0f19;
  --card: #151f32;
  --text: #f1f5f9;
  --muted: #94a3b8;
  --border: #1e293b;
  --soft: #0f172a;
  --yellow: #f59e0b;
  --danger: #ef4444;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  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: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.topbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

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

.logo-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 22px;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.nav {
  display: flex;
  gap: 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
}

.nav a {
  transition: color 0.2s ease;
  position: relative;
  padding: 8px 0;
}

.nav a:hover {
  color: #fff;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.2s ease;
}

.nav a:hover::after {
  width: 100%;
}

.header-search {
  flex: 0 1 320px;
}

.header-search input,
.searchbox input,
.form-control {
  width: 100%;
  padding: 12px 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--soft);
  color: #fff;
  outline: none;
  font-size: 14px;
  transition: all 0.3s ease;
}

.header-search input:focus,
.searchbox input:focus,
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-glow);
  background: #1e293b;
}

.section {
  margin: 36px 0;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 24px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}

.section-title {
  margin: 0;
  font-size: 22px;
  font-weight: 800;
  color: #fff;
}

.page-title {
  margin: 0 0 12px;
  font-size: 32px;
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
}

.view-more {
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
  transition: color 0.2s ease;
}

.view-more:hover {
  color: #60a5fa;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  padding: 14px 24px;
  font-weight: 700;
  font-size: 14px;
  border: 0;
  cursor: pointer;
  transition: all 0.2s ease;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.btn-download {
  background: var(--download);
  color: #fff;
  box-shadow: 0 4px 14px var(--download-glow);
}

.btn-download:hover {
  background: var(--download-dark);
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}

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

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

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

.stars {
  color: var(--yellow);
  letter-spacing: -1px;
}

.hero {
  background: radial-gradient(circle at top right, rgba(37, 99, 235, 0.15), transparent), radial-gradient(circle at bottom left, rgba(5, 150, 105, 0.1), transparent), var(--soft);
  border-bottom: 1px solid var(--border);
  padding: 64px 0;
}

.hero-inner {
  max-width: 840px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 4.5vw, 48px);
  font-weight: 900;
  line-height: 1.15;
  color: #fff;
}

.hero p {
  margin: 0 auto 32px;
  max-width: 680px;
  color: var(--muted);
  font-size: 16px;
}

.searchbox {
  display: flex;
  gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 8px;
  max-width: 680px;
  margin: 0 auto;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
}

.searchbox input {
  border: 0;
  background: transparent;
  color: #fff;
  font-size: 15px;
}

.searchbox input:focus {
  box-shadow: none;
}

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

.chips a {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--soft);
  border: 1px solid var(--border);
  transition: all 0.2s ease;
}

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

.content-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 30px;
  align-items: start;
}

.main-content,
.sidebar {
  display: grid;
  gap: 24px;
}

.main-content {
  min-width: 0;
}

.sidebar {
  width: 100%;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}

.category {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 20px 12px;
  text-align: center;
  transition: all 0.2s ease;
}

.category:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: 0 8px 24px var(--primary-glow);
}

.cat-icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 12px;
  border-radius: 14px;
  background: var(--soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-size: 24px;
  border: 1px solid var(--border);
}

.category strong {
  display: block;
  font-size: 14px;
  color: #fff;
  margin-bottom: 2px;
}

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

.app-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.app-card {
  display: flex;
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--soft);
  transition: all 0.2s ease;
  min-width: 0;
  height: 100%;
}

.app-card:hover {
  transform: translateY(-2px);
  border-color: var(--download);
  box-shadow: 0 8px 24px var(--download-glow);
}

.app-icon,
.rank-icon,
.detail-icon,
.detail-icon-centered,
.big-icon {
  overflow: hidden;
  flex-shrink: 0;
}

.app-icon img,
.rank-icon img,
.detail-icon img,
.detail-icon-centered img,
.big-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.app-icon {
  width: 68px;
  height: 68px;
  border-radius: 16px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-size: 22px;
  font-weight: 800;
  border: 1px solid var(--border);
}

.app-body {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.app-body h3 {
  margin: 0 0 6px;
  font-size: 16px;
  line-height: 1.3;
  color: #fff;
}

.app-meta {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 8px;
}

.app-desc {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 12px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.app-action {
  display: inline-block;
  margin-top: auto;
  color: var(--download);
  font-weight: 700;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.feature-box {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: center;
  background: linear-gradient(135deg, var(--card), var(--soft));
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 28px;
}

.feature-visual {
  height: 220px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: radial-gradient(circle at center, rgba(37, 99, 235, 0.15) 0%, transparent 70%), var(--soft);
  display: grid;
  place-items: center;
}

.big-icon {
  width: 104px;
  height: 104px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 44px;
  font-weight: 900;
  box-shadow: 0 8px 24px rgba(37, 99, 235, 0.3);
}

.badge-accent {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: rgba(217, 119, 6, 0.1);
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 10px;
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.breadcrumb {
  padding: 20px 0;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumb a {
  transition: color 0.2s ease;
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb span {
  color: #fff;
  font-weight: 600;
}

.detail-hero {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.detail-icon {
  width: 112px;
  height: 112px;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 40px;
  font-weight: 900;
  border: 1px solid var(--border);
  box-shadow: 0 8px 24px var(--primary-glow);
}

.detail-icon-centered {
  width: 96px;
  height: 96px;
  margin: 0 auto;
  border-radius: 20px;
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 36px;
  font-weight: 900;
  border: 1px solid var(--border);
}

.detail-title {
  margin: 0 0 8px;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
}

.detail-specs {
  font-size: 14px;
  color: var(--muted);
  margin: 12px 0 0;
}

.detail-specs strong {
  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: 14px 6px;
  font-size: 14px;
}

.spec-table td:first-child {
  color: var(--muted);
  width: 35%;
}

.spec-table td:last-child {
  font-weight: 600;
  color: #fff;
  text-align: right;
}

.rank-list,
.link-list {
  display: grid;
  gap: 14px;
}

.rank-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
}

.rank-num {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  background: var(--soft);
  color: var(--muted);
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 700;
  border: 1px solid var(--border);
}

.rank-item:nth-child(1) .rank-num {
  background: rgba(245, 158, 11, 0.1);
  color: var(--yellow);
  border-color: rgba(245, 158, 11, 0.2);
}

.rank-item:nth-child(2) .rank-num {
  background: rgba(148, 163, 184, 0.1);
  color: #cbd5e1;
  border-color: rgba(148, 163, 184, 0.2);
}

.rank-item:nth-child(3) .rank-num {
  background: rgba(217, 119, 6, 0.1);
  color: var(--accent);
  border-color: rgba(217, 119, 6, 0.2);
}

.rank-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--soft);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-weight: 800;
  border: 1px solid var(--border);
}

.rank-text strong {
  display: block;
  font-size: 14px;
  color: #fff;
}

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

.link-list a {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
  transition: all 0.2s ease;
}

.link-list a:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.link-list a:hover {
  color: #fff;
  padding-left: 4px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.article {
  background: var(--soft);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.2s ease;
}

.article:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
}

.article-thumb {
  height: 120px;
  background: linear-gradient(135deg, var(--card), var(--border));
  display: grid;
  place-items: center;
  font-size: 32px;
}

.article-body {
  padding: 16px;
}

.article-body h3 {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.35;
  color: #fff;
}

.article-body p {
  color: var(--muted);
  font-size: 12px;
  margin: 0;
  line-height: 1.45;
}

.content h2 {
  margin-top: 28px;
  color: #fff;
}

.content p,
.content li {
  color: #cbd5e1;
  font-size: 15px;
  line-height: 1.65;
}

.content ol, .content ul {
  padding-left: 20px;
}

.content li {
  margin-bottom: 10px;
}

.notice {
  background: rgba(217, 119, 6, 0.05);
  border: 1px solid rgba(217, 119, 6, 0.2);
  color: #f59e0b;
  border-radius: 16px;
  padding: 16px 20px;
  font-size: 13px;
  line-height: 1.5;
}

details {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

details:last-child {
  border-bottom: 0;
}

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

.form {
  display: grid;
  gap: 16px;
}

.form-control {
  border-radius: 10px;
  font-size: 14px;
}

textarea.form-control {
  min-height: 140px;
  resize: vertical;
}

.site-footer {
  margin-top: 64px;
  background: var(--soft);
  border-top: 1px solid var(--border);
  padding: 48px 0;
  color: var(--muted);
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 36px;
}

.footer-logo {
  color: #fff;
  font-weight: 800;
  font-size: 24px;
  margin-bottom: 12px;
}

.footer-col h4 {
  color: #fff;
  margin: 0 0 16px;
  font-weight: 700;
  font-size: 15px;
}

.footer-col a {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  transition: color 0.2s ease;
}

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

.copyright {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  text-align: center;
  font-size: 12px;
}

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

@media (min-width: 1024px) {
  .sidebar {
    position: sticky;
    top: 100px;
  }
}

@media (min-width: 1280px) {
  .container {
    max-width: 1200px;
  }
  .app-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 1023px) {
  .topbar {
    flex-wrap: wrap;
    justify-content: center;
    padding: 16px 0;
  }

  .nav {
    order: 3;
    flex-basis: 100%;
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
  }

  .header-search {
    flex: 1 1 100%;
  }

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

  .sidebar {
    margin-top: 24px;
  }

  .category-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .feature-visual {
    width: 100%;
    max-width: 260px;
    margin: 0 auto;
  }

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

@media (max-width: 767px) {
  .app-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .detail-hero {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .detail-hero .btn-row {
    justify-content: center;
  }

  .page-title {
    font-size: 26px;
  }

  .section-title {
    font-size: 20px;
  }

  .card {
    padding: 18px;
  }
}

@media (max-width: 520px) {
  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .topbar {
    gap: 12px;
  }

  .logo {
    font-size: 20px;
  }

  .logo-mark {
    width: 38px;
    height: 38px;
    font-size: 18px;
  }
}