/* roulang page: index */
:root {
  --primary: #101820;
  --primary-soft: #1A2634;
  --accent: #FF5A36;
  --accent-hover: #E84428;
  --secondary: #00C2A8;
  --secondary-soft: #E6FAF6;
  --bg: #F4F6F8;
  --bg-alt: #EEF1F4;
  --card-bg: #FFFFFF;
  --text: #1A2233;
  --text-secondary: #667085;
  --text-light: #9AA5B1;
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 10px rgba(16,24,32,0.04);
  --shadow-md: 0 8px 24px rgba(16,24,32,0.10);
  --shadow-lg: 0 20px 48px rgba(16,24,32,0.14);
  --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC','Helvetica Neue',Arial,sans-serif;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --container: 1280px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; border: 0; }
a { text-decoration: none; color: inherit; transition: color var(--transition), background var(--transition); }
button { font-family: var(--font-sans); cursor: pointer; border: none; background: none; }
input,textarea,select { font-family: var(--font-sans); font-size: 15px; }
ul,ol { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== Header / Navigation ========== */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 2px 12px rgba(16,24,32,0.18);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: #fff;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  font-weight: 900;
  flex-shrink: 0;
}
.logo span { color: var(--accent); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.main-nav a {
  color: rgba(255,255,255,0.82);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  position: relative;
  white-space: nowrap;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}
.main-nav a:hover { color: #fff; }
.main-nav a:hover::after { width: 60%; }
.main-nav a.active { color: #fff; background: rgba(255,90,54,0.18); }
.main-nav a.active::after { width: 60%; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.1);
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

/* ========== Hero ========== */
.hero {
  background: linear-gradient(135deg, #101820 0%, #1A2634 55%, #1F2E3D 100%);
  padding: 70px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,90,54,0.12) 0%, transparent 65%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -150px;
  left: -100px;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0,194,168,0.10) 0%, transparent 60%);
  pointer-events: none;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-content h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.28;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.hero-content h1 .highlight {
  color: var(--accent);
  display: inline-block;
}
.hero-subtitle {
  font-size: 17px;
  color: rgba(255,255,255,0.78);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 520px;
}
.hero-search-wrap {
  display: flex;
  gap: 10px;
  max-width: 460px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.hero-search-input {
  flex: 1;
  min-width: 200px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: all var(--transition);
}
.hero-search-input::placeholder { color: rgba(255,255,255,0.45); }
.hero-search-input:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.16);
  box-shadow: 0 0 0 3px rgba(255,90,54,0.2);
}
.hero-cta-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  line-height: 1.4;
  letter-spacing: 0.2px;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(255,90,54,0.3);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,90,54,0.4);
}
.btn-primary:focus-visible { outline: 2px solid var(--accent-hover); outline-offset: 2px; }
.btn-secondary {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.35);
}
.btn-secondary:hover {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.6);
  transform: translateY(-2px);
}
.btn-secondary:focus-visible { outline: 2px solid rgba(255,255,255,0.6); outline-offset: 2px; }
.btn-sm { padding: 9px 16px; font-size: 14px; border-radius: 6px; }

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.hero-tag {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: 20px;
  transition: all var(--transition);
  cursor: pointer;
}
.hero-tag:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}
.hero-img-wrap {
  width: 100%;
  max-width: 440px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 2px solid rgba(255,255,255,0.15);
  position: relative;
}
.hero-img-wrap img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: var(--radius-xl);
}
.hero-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--accent);
  color: #fff;
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.3px;
  box-shadow: 0 4px 12px rgba(255,90,54,0.35);
}

/* ========== Section Common ========== */
.section {
  padding: 64px 0;
}
.section-alt { background: var(--bg-alt); }
.section-white { background: #fff; }
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
  gap: 16px;
  flex-wrap: wrap;
}
.section-title {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.35;
  letter-spacing: 0.3px;
}
.section-title .icon {
  display: inline-block;
  margin-right: 6px;
  color: var(--accent);
}
.section-subtitle {
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 6px;
  max-width: 560px;
  line-height: 1.6;
}
.section-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: color var(--transition);
}
.section-link:hover { color: var(--accent-hover); text-decoration: underline; }

/* ========== Phone Cards ========== */
.phone-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.phone-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.phone-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #D0D8E0;
}
.phone-card-img {
  width: 100%;
  aspect-ratio: 4/5;
  overflow: hidden;
  background: #EDF0F3;
  position: relative;
}
.phone-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.phone-card:hover .phone-card-img img { transform: scale(1.03); }
.phone-card-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 20px;
  letter-spacing: 0.3px;
}
.phone-card-badge.hot { background: #E84428; }
.phone-card-badge.new { background: var(--secondary); }
.phone-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  flex: 1;
  gap: 8px;
}
.phone-card-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}
.phone-card-specs {
  font-size: 13px;
  color: var(--text-secondary);
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
}
.phone-card-specs span { white-space: nowrap; }
.phone-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}
.phone-card-price {
  font-size: 15px;
  font-weight: 800;
  color: var(--accent);
}
.phone-card-rating {
  font-size: 13px;
  color: #F5A623;
  font-weight: 600;
}

/* ========== Brand Grid ========== */
.brand-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 14px;
}
.brand-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 18px 10px;
  text-align: center;
  transition: all var(--transition);
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-secondary);
}
.brand-item:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.brand-item .brand-icon {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 6px;
  display: block;
}
.brand-item:hover .brand-icon { color: var(--accent); }

/* ========== Ranking List ========== */
.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.ranking-item {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  transition: all var(--transition);
  cursor: pointer;
}
.ranking-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: #D0D8E0;
  transform: translateX(4px);
}
.ranking-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--accent);
  min-width: 42px;
  text-align: center;
  flex-shrink: 0;
}
.ranking-info { flex: 1; }
.ranking-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 3px;
}
.ranking-reason {
  font-size: 13px;
  color: var(--text-secondary);
}
.ranking-stars {
  font-size: 14px;
  color: #F5A623;
  margin-right: 8px;
  white-space: nowrap;
}
.ranking-price {
  font-size: 15px;
  font-weight: 800;
  color: var(--accent);
  white-space: nowrap;
}

/* ========== Feature Cards ========== */
.feature-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.feature-card-lg {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  min-height: 260px;
  display: flex;
  align-items: flex-end;
  padding: 28px;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}
.feature-card-lg:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.feature-card-lg .bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(16,24,32,0.85) 0%, rgba(16,24,32,0.55) 50%, rgba(16,24,32,0.2) 100%);
  z-index: 1;
}
.feature-card-lg .bg-img {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.feature-card-lg .bg-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feature-card-lg .card-content {
  position: relative;
  z-index: 2;
  color: #fff;
}
.feature-card-lg .card-content h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 8px;
}
.feature-card-lg .card-content p {
  font-size: 14px;
  color: rgba(255,255,255,0.8);
  max-width: 360px;
  line-height: 1.6;
}

/* ========== Category Entry ========== */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.category-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 26px 22px;
  transition: all var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 10px;
  position: relative;
  overflow: hidden;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--accent);
  opacity: 0;
  transition: opacity var(--transition);
}
.category-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: #D0D8E0;
}
.category-card:hover::before { opacity: 1; }
.category-card h3 {
  font-size: 19px;
  font-weight: 800;
  color: var(--primary);
}
.category-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.category-card .cat-tag {
  display: inline-block;
  padding: 5px 12px;
  background: var(--secondary-soft);
  color: var(--secondary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 16px;
  align-self: flex-start;
}

/* ========== CMS News List ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.news-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.news-card-img {
  width: 100%;
  aspect-ratio: 16/9;
  background: #EDF0F3;
  overflow: hidden;
}
.news-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-card-img img { transform: scale(1.04); }
.news-card-body {
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.news-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--text-light);
}
.news-card-cat {
  background: var(--secondary-soft);
  color: var(--secondary);
  padding: 3px 10px;
  border-radius: 14px;
  font-weight: 600;
  font-size: 12px;
}
.news-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.45;
}
.news-card-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  background: var(--card-bg);
  border: 2px dashed var(--border);
  border-radius: var(--radius-md);
  padding: 48px 24px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 15px;
}

/* ========== Price Filter ========== */
.price-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.price-chip {
  padding: 12px 22px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  transition: all var(--transition);
  cursor: pointer;
  white-space: nowrap;
}
.price-chip:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #FFF5F2;
  transform: translateY(-1px);
}

/* ========== Tag Cloud ========== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.cloud-tag {
  padding: 9px 18px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 22px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
  cursor: pointer;
}
.cloud-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #FFF5F2;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ========== Editor Picks ========== */
.editor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.editor-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  cursor: pointer;
}
.editor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.editor-card-img {
  width: 100%;
  aspect-ratio: 4/3;
  background: #EDF0F3;
  overflow: hidden;
}
.editor-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.editor-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.editor-card-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
}
.editor-card-stars {
  font-size: 14px;
  color: #F5A623;
}
.editor-card-comment {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========== Steps ========== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.step-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  text-align: center;
  transition: all var(--transition);
}
.step-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 14px;
}
.step-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}
.step-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ========== Compare Card ========== */
.compare-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.compare-header {
  background: var(--primary);
  color: #fff;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.compare-header h3 {
  font-size: 18px;
  font-weight: 800;
}
.compare-body {
  padding: 20px 24px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.compare-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px;
  text-align: center;
  transition: all var(--transition);
}
.compare-item:hover { border-color: var(--accent); }
.compare-item .model {
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.compare-item .spec {
  display: inline-block;
  background: var(--secondary-soft);
  color: var(--secondary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 14px;
  margin: 3px;
}

/* ========== FAQ ========== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: #D0D8E0; }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-question .faq-icon {
  font-size: 20px;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-question .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 20px 16px;
}

/* ========== Stats ========== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px 20px;
  text-align: center;
  transition: all var(--transition);
}
.stat-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}
.stat-num {
  font-size: 36px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
}

/* ========== CTA Section ========== */
.cta-section {
  background: var(--primary);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -60px;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,90,54,0.15);
  pointer-events: none;
}
.cta-section h2 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}
.cta-section p {
  font-size: 15px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.cta-form {
  display: flex;
  gap: 10px;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
  position: relative;
  z-index: 1;
}
.cta-input {
  flex: 1;
  min-width: 220px;
  padding: 13px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.25);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: all var(--transition);
}
.cta-input::placeholder { color: rgba(255,255,255,0.45); }
.cta-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255,90,54,0.2);
}
.cta-form .btn-primary { flex-shrink: 0; }
.cta-success {
  display: none;
  margin-top: 16px;
  font-size: 14px;
  color: var(--secondary);
  font-weight: 600;
  position: relative;
  z-index: 1;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 28px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 36px;
}
.footer-brand h4 {
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}
.footer-brand h4 span { color: var(--accent); }
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.6);
}
.footer-col h5 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 13px;
  color: rgba(255,255,255,0.45);
}
.footer-bottom a { color: rgba(255,255,255,0.55); }
.footer-bottom a:hover { color: var(--accent); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { order: -1; }
  .hero-img-wrap { max-width: 100%; }
  .phone-grid { grid-template-columns: repeat(3, 1fr); }
  .editor-grid { grid-template-columns: repeat(3, 1fr); }
  .brand-grid { grid-template-columns: repeat(6, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .compare-body { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 52px 0; }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 16px 20px;
    gap: 4px;
    border-bottom: 2px solid var(--accent);
    box-shadow: var(--shadow-md);
  }
  .main-nav.open { display: flex; }
  .main-nav a { width: 100%; text-align: left; padding: 12px 16px; }
  .main-nav a::after { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 48px 0 56px; }
  .hero-content h1 { font-size: 30px; }
  .hero-subtitle { font-size: 15px; }
  .phone-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .editor-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .category-grid { grid-template-columns: 1fr; }
  .feature-grid-2 { grid-template-columns: 1fr; }
  .brand-grid { grid-template-columns: repeat(4, 1fr); gap: 10px; }
  .news-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .compare-body { grid-template-columns: 1fr; }
  .section { padding: 40px 0; }
  .section-title { font-size: 22px; }
  .ranking-item { flex-wrap: wrap; gap: 8px; }
  .ranking-price { margin-left: auto; }
  .cta-section { padding: 32px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 22px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 14px; }
  .site-header .container { height: 60px; }
  .logo { font-size: 16px; }
  .logo-icon { width: 32px; height: 32px; font-size: 15px; }
  .main-nav { top: 60px; }
  .hero-content h1 { font-size: 26px; }
  .phone-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .phone-card-body { padding: 12px; }
  .phone-card-name { font-size: 14px; }
  .editor-grid { grid-template-columns: 1fr; }
  .section-title { font-size: 20px; }
  .btn { padding: 10px 18px; font-size: 14px; }
  .hero-cta-group { flex-direction: column; }
  .hero-cta-group .btn { width: 100%; }
}

/* roulang page: category1 */
:root {
  --primary: #101820;
  --primary-soft: #1A2634;
  --accent: #FF5A36;
  --accent-hover: #E84428;
  --secondary: #00C2A8;
  --secondary-soft: #E6FAF6;
  --bg: #F4F6F8;
  --bg-alt: #EEF1F4;
  --card-bg: #FFFFFF;
  --text: #1A2233;
  --text-secondary: #667085;
  --text-light: #9AA5B1;
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 10px rgba(16,24,32,0.04);
  --shadow-md: 0 8px 24px rgba(16,24,32,0.10);
  --shadow-lg: 0 20px 48px rgba(16,24,32,0.14);
  --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC','Helvetica Neue',Arial,sans-serif;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --container: 1280px;
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { text-decoration: none; color: inherit; transition: color var(--transition), background var(--transition); }
button { font-family: var(--font-sans); cursor: pointer; border: none; background: none; }
input,textarea,select { font-family: var(--font-sans); font-size: 15px; }
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}
/* ========== Header / Navigation ========== */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 2px 12px rgba(16,24,32,0.18);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: #fff;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  font-weight: 900;
  flex-shrink: 0;
}
.logo span { color: var(--accent); }
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.main-nav a {
  color: rgba(255,255,255,0.82);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  position: relative;
  white-space: nowrap;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}
.main-nav a:hover { color: #fff; }
.main-nav a:hover::after { width: 60%; }
.main-nav a.active { color: #fff; background: rgba(255,90,54,0.18); }
.main-nav a.active::after { width: 60%; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.1);
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}
/* ========== Breadcrumb / Category Title ========== */
.category-head {
  background: var(--bg-alt);
  padding: 36px 0 32px;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 18px;
}
.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition);
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--text-light); }
.breadcrumb .current { color: var(--text); font-weight: 500; }
.category-head h1 {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  margin-bottom: 10px;
  letter-spacing: 0.2px;
}
.category-head-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 780px;
  margin-bottom: 0;
}
/* ========== Filter Tags ========== */
.filter-section {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 68px;
  z-index: 50;
}
.filter-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-right: 6px;
  white-space: nowrap;
}
.filter-tag {
  display: inline-block;
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  transition: all var(--transition);
  white-space: nowrap;
}
.filter-tag:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255,90,54,0.05);
}
.filter-tag.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(255,90,54,0.25);
}
/* ========== Phone Cards Grid ========== */
.phones-section {
  padding: 48px 0 56px;
  background: var(--bg);
}
.section-heading {
  margin-bottom: 24px;
}
.section-heading h2 {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 6px;
  letter-spacing: 0.2px;
}
.section-heading p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 0;
}
.phones-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.phone-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.phone-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(255,90,54,0.4);
}
.phone-card-img {
  aspect-ratio: 4/3;
  overflow: hidden;
  background: var(--bg-alt);
  position: relative;
}
.phone-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.phone-card-body {
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}
.phone-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0;
  line-height: 1.4;
}
.phone-card-price {
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
}
.phone-card-specs {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.phone-card-specs .spec-tag {
  padding: 3px 10px;
  background: var(--bg-alt);
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-secondary);
}
.phone-card-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  gap: 8px;
}
.phone-badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  line-height: 1.4;
}
.phone-badge.new { background: rgba(255,90,54,0.12); color: var(--accent); }
.phone-badge.hot { background: rgba(0,194,168,0.1); color: #00A68C; }
.phone-badge.cn-sys { background: rgba(16,24,32,0.06); color: var(--primary); }
.stars {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 1px;
}
/* ========== Tag Cloud ========== */
.tag-cloud-section {
  padding: 40px 0 44px;
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.tag-cloud-chip {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 24px;
  transition: all var(--transition);
}
.tag-cloud-chip:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(255,90,54,0.05);
  transform: translateY(-1px);
}
/* ========== Update List ========== */
.updates-section {
  padding: 48px 0 52px;
  background: var(--bg-alt);
}
.updates-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.update-item {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.update-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: rgba(255,90,54,0.35);
}
.update-date {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  min-width: 90px;
  padding-top: 2px;
}
.update-content {
  flex: 1;
  min-width: 0;
}
.update-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.5;
}
.update-summary {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.update-empty {
  background: var(--card-bg);
  border-radius: var(--radius-sm);
  padding: 24px;
  text-align: center;
  color: var(--text-secondary);
  border: 1px dashed var(--border);
  font-size: 15px;
}
/* ========== FAQ ========== */
.faq-section {
  padding: 48px 0 52px;
  background: var(--card-bg);
}
.faq-list {
  max-width: 850px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.faq-item {
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item.open {
  border-color: rgba(255,90,54,0.4);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  gap: 12px;
  text-align: left;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--accent); }
.faq-icon {
  font-size: 20px;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: none;
}
.faq-item.open .faq-answer { display: block; }
/* ========== CTA ========== */
.cta-section {
  padding: 56px 0;
  background: linear-gradient(135deg, #101820 0%, #1A2634 65%, #1F2E3D 100%);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -80px;
  width: 350px;
  height: 350px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,90,54,0.15) 0%, transparent 65%);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
}
.cta-inner h2 {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.35;
}
.cta-inner p {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 0;
  max-width: 550px;
}
.cta-form {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.cta-input {
  min-width: 260px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.1);
  color: #fff;
  font-size: 15px;
  outline: none;
  transition: all var(--transition);
}
.cta-input::placeholder { color: rgba(255,255,255,0.45); }
.cta-input:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.16);
  box-shadow: 0 0 0 3px rgba(255,90,54,0.2);
}
.cta-btn {
  padding: 12px 24px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  white-space: nowrap;
}
.cta-btn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,90,54,0.4);
}
.cta-btn:focus-visible { outline: 2px solid var(--accent-hover); outline-offset: 2px; }
.cta-note {
  font-size: 12px;
  color: rgba(255,255,255,0.5);
  margin-top: 10px;
}
/* ========== Related Categories ========== */
.related-cats-section {
  padding: 48px 0 56px;
  background: var(--bg);
}
.related-cats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}
.related-cat-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  gap: 16px;
}
.related-cat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(255,90,54,0.35);
}
.related-cat-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}
.related-cat-icon.budget { background: rgba(0,194,168,0.12); }
.related-cat-icon.gaming { background: rgba(255,90,54,0.12); }
.related-cat-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.related-cat-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 0;
}
/* ========== Footer ========== */
.site-footer {
  background: var(--primary);
  color: #fff;
  padding: 56px 0 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.8fr 0.8fr 1.1fr;
  gap: 36px;
  margin-bottom: 36px;
}
.footer-brand h4 {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 14px;
  line-height: 1.4;
}
.footer-brand h4 span { color: var(--accent); }
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: 0;
  max-width: 300px;
}
.footer-col h5 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
  color: #fff;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom a {
  color: rgba(255,255,255,0.6);
}
.footer-bottom a:hover { color: #fff; }
/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .phones-grid { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1.2fr 0.8fr 0.8fr; }
  .footer-col:last-child { grid-column: span 3; }
}
@media (max-width: 768px) {
  .site-header .container { height: 60px; }
  .main-nav {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 16px 20px;
    gap: 4px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .main-nav.open { display: flex; }
  .main-nav a { width: 100%; padding: 12px 14px; }
  .main-nav a::after { display: none; }
  .nav-toggle { display: flex; }
  .category-head h1 { font-size: 27px; }
  .phones-grid { grid-template-columns: repeat(2, 1fr); }
  .filter-section { top: 60px; }
  .related-cats-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-col:last-child { grid-column: span 1; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .cta-form { width: 100%; }
  .cta-input { flex: 1; min-width: 180px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .category-head { padding: 24px 0 22px; }
  .category-head h1 { font-size: 23px; }
  .category-head-desc { font-size: 14px; }
  .phones-grid { grid-template-columns: 1fr; gap: 14px; }
  .phone-card { border-radius: var(--radius-sm); }
  .phone-card-img { aspect-ratio: 16/9; }
  .section-heading h2 { font-size: 21px; }
  .update-item { flex-direction: column; gap: 6px; padding: 14px 16px; }
  .update-date { min-width: auto; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .cta-inner h2 { font-size: 21px; }
}

/* roulang page: article */
:root {
  --primary: #101820;
  --primary-soft: #1A2634;
  --accent: #FF5A36;
  --accent-hover: #E84428;
  --secondary: #00C2A8;
  --secondary-soft: #E6FAF6;
  --bg: #F4F6F8;
  --bg-alt: #EEF1F4;
  --card-bg: #FFFFFF;
  --text: #1A2233;
  --text-secondary: #667085;
  --text-light: #9AA5B1;
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 10px rgba(16,24,32,0.04);
  --shadow-md: 0 8px 24px rgba(16,24,32,0.10);
  --shadow-lg: 0 20px 48px rgba(16,24,32,0.14);
  --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC','Helvetica Neue',Arial,sans-serif;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --container: 1280px;
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { text-decoration: none; color: inherit; transition: color var(--transition), background var(--transition); }
button { font-family: var(--font-sans); cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: var(--font-sans); font-size: 15px; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* ========== Header / Navigation ========== */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 2px 12px rgba(16,24,32,0.18);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; height: 68px; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 19px; color: #fff; letter-spacing: 0.5px; white-space: nowrap; }
.logo-icon { width: 38px; height: 38px; border-radius: 10px; background: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 18px; color: #fff; font-weight: 900; flex-shrink: 0; }
.logo span { color: var(--accent); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { color: rgba(255,255,255,0.82); font-size: 15px; font-weight: 500; padding: 8px 14px; border-radius: var(--radius-sm); position: relative; white-space: nowrap; }
.main-nav a::after { content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background: var(--accent); border-radius: 2px; transition: width var(--transition); }
.main-nav a:hover { color: #fff; }
.main-nav a:hover::after { width: 60%; }
.main-nav a.active { color: #fff; background: rgba(255,90,54,0.18); }
.main-nav a.active::after { width: 60%; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; border-radius: 6px; background: rgba(255,255,255,0.1); }
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: all var(--transition); }

/* ========== Buttons ========== */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 22px; font-size: 15px; font-weight: 600; border-radius: var(--radius-sm); transition: all var(--transition); line-height: 1.4; letter-spacing: 0.2px; white-space: nowrap; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 14px rgba(255,90,54,0.3); }
.btn-primary:hover { background: var(--accent-hover); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,90,54,0.4); color: #fff; }
.btn-primary:focus-visible { outline: 2px solid var(--accent-hover); outline-offset: 2px; }
.btn-secondary { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-secondary:hover { background: var(--bg-alt); color: var(--primary); border-color: var(--text-light); transform: translateY(-2px); }
.btn-secondary:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn-sm { padding: 9px 16px; font-size: 14px; border-radius: 6px; }

/* ========== Breadcrumb ========== */
.breadcrumb-section { background: #fff; border-bottom: 1px solid var(--border); padding: 16px 0; }
.breadcrumb-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; font-size: 14px; color: var(--text-secondary); }
.breadcrumb-nav a { color: var(--text-secondary); transition: color var(--transition); }
.breadcrumb-nav a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--text-light); }
.breadcrumb-current { color: var(--text); font-weight: 500; max-width: 320px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ========== Article Main ========== */
.article-main { padding: 48px 0 64px; }
.article-layout { display: grid; grid-template-columns: minmax(0,1fr) 300px; gap: 40px; align-items: start; }
.article-content-area { min-width: 0; background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); overflow: hidden; border: 1px solid var(--border); }

/* Article Hero Image */
.article-cover { width: 100%; aspect-ratio: 21/9; object-fit: cover; background: var(--bg-alt); }

/* Article Title Area */
.article-title-wrap { padding: 28px 32px 20px; border-bottom: 1px solid var(--border); }
.article-category-label { display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent); background: rgba(255,90,54,0.10); padding: 4px 12px; border-radius: 20px; margin-bottom: 12px; }
.article-title-wrap h1 { font-size: 32px; font-weight: 800; line-height: 1.35; color: var(--primary); margin-bottom: 16px; letter-spacing: 0.2px; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; font-size: 14px; color: var(--text-secondary); }
.article-meta-item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta-item .meta-icon { font-size: 15px; }
.article-meta-item strong { font-weight: 600; color: var(--text); }

/* Article Body */
.article-body { padding: 28px 32px 32px; font-size: 16.5px; line-height: 1.85; color: #2A3342; }
.article-body h2 { font-size: 25px; font-weight: 700; color: var(--primary); margin: 32px 0 16px; line-height: 1.4; padding-bottom: 8px; border-bottom: 2px solid var(--bg-alt); }
.article-body h3 { font-size: 21px; font-weight: 700; color: var(--primary); margin: 26px 0 14px; line-height: 1.4; }
.article-body h4 { font-size: 18px; font-weight: 600; color: var(--text); margin: 20px 0 12px; line-height: 1.45; }
.article-body p { margin-bottom: 18px; }
.article-body a { color: var(--accent); font-weight: 500; }
.article-body a:hover { color: var(--accent-hover); text-decoration: underline; }
.article-body ul, .article-body ol { margin: 0 0 20px 0; padding-left: 24px; }
.article-body ul li, .article-body ol li { margin-bottom: 8px; }
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body img { width: 100%; border-radius: var(--radius-md); margin: 20px 0; background: var(--bg-alt); }
.article-body blockquote { border-left: 4px solid var(--accent); background: var(--bg); margin: 20px 0; padding: 16px 20px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; color: var(--text-secondary); font-style: italic; }
.article-body table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 15px; overflow: hidden; border-radius: var(--radius-sm); }
.article-body table th { background: var(--primary); color: #fff; font-weight: 600; padding: 12px 14px; text-align: left; white-space: nowrap; }
.article-body table td { padding: 11px 14px; border-bottom: 1px solid var(--border); background: #fff; }
.article-body table tr:nth-child(even) td { background: #FAFBFC; }
.article-body .spec-block { background: var(--bg); border-radius: var(--radius-md); padding: 18px 20px; margin: 20px 0; border: 1px solid var(--border); }
.article-body .spec-block strong { color: var(--primary); display: block; margin-bottom: 8px; font-size: 16px; }

/* ========== Article Sidebar ========== */
.article-sidebar { position: sticky; top: 88px; display: flex; flex-direction: column; gap: 24px; }
.sidebar-card { background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); border: 1px solid var(--border); padding: 20px; }
.sidebar-card h3 { font-size: 17px; font-weight: 700; color: var(--primary); margin-bottom: 14px; padding-bottom: 10px; border-bottom: 2px solid var(--bg-alt); }
.sidebar-toc-list { list-style: none; padding: 0; margin: 0; }
.sidebar-toc-list li { margin-bottom: 6px; }
.sidebar-toc-list a { display: block; font-size: 14px; color: var(--text-secondary); padding: 7px 12px; border-radius: 6px; transition: all var(--transition); }
.sidebar-toc-list a:hover { background: var(--secondary-soft); color: var(--primary); padding-left: 16px; }
.sidebar-toc-list a.active { background: var(--secondary-soft); color: var(--primary); font-weight: 600; border-left: 3px solid var(--secondary); }
.sidebar-tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.sidebar-tag { display: inline-block; font-size: 13px; padding: 6px 13px; background: var(--bg); color: var(--text-secondary); border-radius: 20px; font-weight: 500; transition: all var(--transition); }
.sidebar-tag:hover { background: var(--accent); color: #fff; }
.sidebar-tip { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-soft) 100%); color: #fff; border-radius: var(--radius-md); padding: 20px; border: none; }
.sidebar-tip h3 { color: #fff; border-bottom-color: rgba(255,255,255,0.2); }
.sidebar-tip p { font-size: 14px; color: rgba(255,255,255,0.8); margin-bottom: 16px; }
.sidebar-tip .btn { background: var(--accent); color: #fff; width: 100%; }
.sidebar-tip .btn:hover { background: var(--accent-hover); color: #fff; }

/* ========== Article Bottom Sections ========== */
.article-bottom { max-width: 860px; }
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 32px; }
.article-tag { display: inline-block; font-size: 13px; padding: 6px 16px; background: #fff; color: var(--text-secondary); border-radius: 20px; font-weight: 500; border: 1px solid var(--border); transition: all var(--transition); }
.article-tag:hover { border-color: var(--accent); color: var(--accent); background: #fff; }
.section-title-mini { font-size: 19px; font-weight: 700; color: var(--primary); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.section-title-mini::before { content: ''; width: 3px; height: 18px; background: var(--accent); border-radius: 2px; display: inline-block; }

/* Related Articles */
.related-section { margin-bottom: 32px; }
.related-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.related-card { background: #fff; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); border: 1px solid var(--border); transition: all var(--transition); }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.related-card img { width: 100%; aspect-ratio: 16/10; object-fit: cover; background: var(--bg-alt); }
.related-card-content { padding: 14px 16px; }
.related-card-title { font-size: 15px; font-weight: 600; color: var(--primary); margin-bottom: 6px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card-time { font-size: 13px; color: var(--text-light); }
.related-card:hover .related-card-title { color: var(--accent); }

/* Prev / Next Navigation */
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 32px; }
.post-nav-item { background: #fff; border-radius: var(--radius-md); border: 1px solid var(--border); padding: 16px 20px; transition: all var(--transition); display: block; }
.post-nav-item:hover { border-color: var(--accent); box-shadow: var(--shadow-sm); }
.post-nav-item .nav-label { font-size: 12px; color: var(--text-light); margin-bottom: 6px; font-weight: 500; letter-spacing: 0.5px; }
.post-nav-item .nav-title { font-size: 15px; font-weight: 600; color: var(--primary); line-height: 1.4; }
.post-nav-item:hover .nav-title { color: var(--accent); }
.post-nav-item.next { text-align: right; }

/* Subscribe CTA */
.subscribe-section { margin-bottom: 32px; }
.subscribe-card { background: linear-gradient(135deg, var(--primary) 0%, #1A2634 55%, #1F2E3D 100%); border-radius: var(--radius-lg); padding: 36px 36px; display: flex; align-items: center; justify-content: space-between; gap: 28px; flex-wrap: wrap; position: relative; overflow: hidden; }
.subscribe-card::before { content: ''; position: absolute; top: -120px; right: -120px; width: 360px; height: 360px; border-radius: 50%; background: radial-gradient(circle, rgba(255,90,54,0.15) 0%, transparent 65%); pointer-events: none; }
.subscribe-info h2 { font-size: 22px; font-weight: 700; color: #fff; margin-bottom: 8px; position: relative; }
.subscribe-info p { font-size: 14px; color: rgba(255,255,255,0.75); margin: 0; position: relative; max-width: 400px; }
.subscribe-form { display: flex; gap: 10px; flex-wrap: wrap; position: relative; }
.subscribe-form input[type="email"] { min-width: 240px; padding: 12px 16px; border-radius: var(--radius-sm); border: 1px solid rgba(255,255,255,0.2); background: rgba(255,255,255,0.12); color: #fff; font-size: 15px; outline: none; transition: all var(--transition); }
.subscribe-form input[type="email"]::placeholder { color: rgba(255,255,255,0.5); }
.subscribe-form input[type="email"]:focus { border-color: var(--accent); background: rgba(255,255,255,0.18); }
.subscribe-form .btn { background: var(--accent); color: #fff; border: none; }
.subscribe-form .btn:hover { background: var(--accent-hover); color: #fff; }
.form-success-msg { display: none; color: var(--secondary); font-size: 14px; margin-top: 8px; font-weight: 600; position: relative; }

/* Back to Home */
.back-home-section { text-align: center; margin-top: 16px; }
.back-home-section .btn { min-width: 180px; }

/* Empty State */
.empty-state { background: #fff; border-radius: var(--radius-lg); padding: 60px 30px; text-align: center; box-shadow: var(--shadow-sm); border: 1px solid var(--border); }
.empty-icon { font-size: 56px; margin-bottom: 20px; }
.empty-state h2 { font-size: 26px; font-weight: 700; color: var(--primary); margin-bottom: 12px; }
.empty-state p { color: var(--text-secondary); font-size: 16px; margin-bottom: 24px; }

/* ========== Footer ========== */
.site-footer { background: var(--primary); color: rgba(255,255,255,0.75); padding: 56px 0 28px; margin-top: 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 32px; margin-bottom: 36px; }
.footer-brand h4 { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.footer-brand h4 span { color: var(--accent); }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.65); }
.footer-col h5 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 8px; transition: color var(--transition); }
.footer-col a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; align-items: center; font-size: 13px; color: rgba(255,255,255,0.5); }
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: var(--accent); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { position: static; display: grid; grid-template-columns: repeat(2,1fr); gap: 16px; }
  .related-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 768px) {
  body { font-size: 15px; }
  .site-header .container { height: 60px; }
  .nav-toggle { display: flex; }
  .main-nav { display: none; position: absolute; top: 60px; left: 0; right: 0; background: var(--primary); flex-direction: column; padding: 12px 20px 20px; border-bottom: 1px solid rgba(255,255,255,0.08); box-shadow: 0 12px 24px rgba(16,24,32,0.24); align-items: stretch; gap: 4px; }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 14px; width: 100%; }
  .main-nav a::after { display: none; }
  .logo { font-size: 16px; }
  .logo-icon { width: 32px; height: 32px; font-size: 15px; border-radius: 8px; }
  .article-main { padding: 28px 0 40px; }
  .article-title-wrap { padding: 20px 18px 16px; }
  .article-title-wrap h1 { font-size: 24px; }
  .article-body { padding: 20px 18px 24px; font-size: 15.5px; }
  .article-body h2 { font-size: 21px; }
  .article-body h3 { font-size: 18px; }
  .article-body h4 { font-size: 16px; }
  .article-sidebar { grid-template-columns: 1fr; gap: 14px; }
  .related-grid { grid-template-columns: 1fr; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav-item.next { text-align: left; }
  .subscribe-card { padding: 24px 20px; flex-direction: column; align-items: flex-start; }
  .subscribe-form { width: 100%; }
  .subscribe-form input[type="email"] { flex: 1; min-width: 0; width: 100%; }
  .subscribe-form .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-brand { grid-column: 1 / -1; }
  .breadcrumb-current { max-width: 180px; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-body { font-size: 15px; line-height: 1.75; }
  .article-body table { font-size: 13px; }
  .article-body table th, .article-body table td { padding: 8px 10px; }
  .footer-grid { grid-template-columns: 1fr; gap: 20px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; gap: 8px; }
  .article-title-wrap h1 { font-size: 21px; }
  .article-meta { gap: 10px; font-size: 13px; }
}

/* roulang page: category3 */
:root {
      --primary: #101820;
      --primary-soft: #1A2634;
      --accent: #FF5A36;
      --accent-hover: #E84428;
      --secondary: #00C2A8;
      --secondary-soft: #E6FAF6;
      --bg: #F4F6F8;
      --bg-alt: #EEF1F4;
      --card-bg: #FFFFFF;
      --text: #1A2233;
      --text-secondary: #667085;
      --text-light: #9AA5B1;
      --border: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 20px;
      --shadow-sm: 0 2px 10px rgba(16,24,32,0.04);
      --shadow-md: 0 8px 24px rgba(16,24,32,0.10);
      --shadow-lg: 0 20px 48px rgba(16,24,32,0.14);
      --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC','Helvetica Neue',Arial,sans-serif;
      --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
      --container: 1280px;
    }
    html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
    body {
      font-family: var(--font-sans);
      font-size: 16px;
      font-weight: 400;
      line-height: 1.6;
      color: var(--text);
      background: var(--bg);
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    img { max-width: 100%; height: auto; display: block; border: 0; }
    a { text-decoration: none; color: inherit; transition: color var(--transition), background var(--transition); }
    button { font-family: var(--font-sans); cursor: pointer; border: none; background: none; }
    input,textarea,select { font-family: var(--font-sans); font-size: 15px; }
    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 20px;
    }
    /* Header / Navigation */
    .site-header {
      background: var(--primary);
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid rgba(255,255,255,0.08);
      box-shadow: 0 2px 12px rgba(16,24,32,0.18);
    }
    .site-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
      gap: 24px;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 19px;
      color: #fff;
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    .logo-icon {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: #fff;
      font-weight: 900;
      flex-shrink: 0;
    }
    .logo span { color: var(--accent); }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .main-nav a {
      color: rgba(255,255,255,0.82);
      font-size: 15px;
      font-weight: 500;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      position: relative;
      white-space: nowrap;
    }
    .main-nav a::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
      transition: width var(--transition);
    }
    .main-nav a:hover { color: #fff; }
    .main-nav a:hover::after { width: 60%; }
    .main-nav a.active { color: #fff; background: rgba(255,90,54,0.18); }
    .main-nav a.active::after { width: 60%; }
    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 8px;
      border-radius: 6px;
      background: rgba(255,255,255,0.1);
    }
    .nav-toggle span {
      width: 24px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: all var(--transition);
    }
    /* Breadcrumb & Category Header */
    .category-header {
      background: var(--bg-alt);
      border-bottom: 1px solid var(--border);
      padding: 28px 0 26px;
    }
    .breadcrumb-nav {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      color: var(--text-secondary);
      margin-bottom: 12px;
      flex-wrap: wrap;
    }
    .breadcrumb-nav a { color: var(--text-secondary); }
    .breadcrumb-nav a:hover { color: var(--accent); }
    .breadcrumb-nav .separator { color: var(--text-light); }
    .breadcrumb-nav .current { color: var(--text); font-weight: 600; }
    .category-header h1 {
      font-size: 34px;
      font-weight: 800;
      color: var(--text);
      margin-bottom: 8px;
      letter-spacing: 0.2px;
    }
    .category-header-desc {
      font-size: 15px;
      color: var(--text-secondary);
      max-width: 760px;
      line-height: 1.7;
    }
    /* Filter Tags Bar */
    .filter-bar {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      margin: 24px 0 28px;
      box-shadow: var(--shadow-sm);
    }
    .filter-group {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
      margin-bottom: 10px;
    }
    .filter-group:last-child { margin-bottom: 0; }
    .filter-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-secondary);
      min-width: 56px;
      flex-shrink: 0;
    }
    .filter-tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 500;
      color: var(--text-secondary);
      background: var(--bg);
      border: 1px solid var(--border);
      border-radius: 20px;
      transition: all var(--transition);
      white-space: nowrap;
    }
    .filter-tag:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(255,90,54,0.06);
    }
    .filter-tag.active {
      background: var(--accent);
      color: #fff;
      border-color: var(--accent);
    }
    /* Section Common */
    .section {
      padding: 48px 0;
    }
    .section-title {
      font-size: 26px;
      font-weight: 800;
      color: var(--text);
      margin-bottom: 8px;
      letter-spacing: 0.2px;
    }
    .section-subtitle {
      font-size: 15px;
      color: var(--text-secondary);
      margin-bottom: 28px;
      line-height: 1.7;
    }
    /* Phone Cards Grid */
    .phone-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .phone-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: all var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }
    .phone-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255,90,54,0.25);
    }
    .phone-card-image {
      aspect-ratio: 4 / 3;
      overflow: hidden;
      background: var(--bg-alt);
      position: relative;
    }
    .phone-card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .phone-card:hover .phone-card-image img { transform: scale(1.05); }
    .phone-card-badge {
      position: absolute;
      top: 10px;
      left: 10px;
      z-index: 2;
    }
    .badge-tag {
      display: inline-block;
      padding: 4px 10px;
      font-size: 12px;
      font-weight: 700;
      border-radius: 4px;
      color: #fff;
    }
    .badge-new { background: var(--accent); }
    .badge-hot { background: #FF3B5C; }
    .badge-recommend { background: var(--secondary); }
    .phone-card-body {
      padding: 16px 16px 18px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      flex: 1;
    }
    .phone-card-name {
      font-size: 16px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.4;
    }
    .phone-card-price {
      font-size: 15px;
      font-weight: 700;
      color: var(--accent);
    }
    .phone-card-specs {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
      display: flex;
      flex-wrap: wrap;
      gap: 4px 12px;
    }
    .phone-card-specs span { display: inline-flex; align-items: center; gap: 4px; }
    .rating-stars {
      display: flex;
      align-items: center;
      gap: 2px;
      font-size: 14px;
      color: #FFB800;
    }
    .rating-stars .score {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-secondary);
      margin-left: 4px;
    }
    .phone-card-link {
      margin-top: auto;
      padding-top: 8px;
    }
    .phone-card-link a {
      font-size: 14px;
      font-weight: 600;
      color: var(--accent);
    }
    .phone-card-link a:hover { color: var(--accent-hover); text-decoration: underline; }
    /* Tag Cloud */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .tag-cloud-item {
      display: inline-flex;
      align-items: center;
      padding: 8px 18px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: 24px;
      transition: all var(--transition);
    }
    .tag-cloud-item:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: rgba(255,90,54,0.06);
      transform: translateY(-2px);
    }
    /* Feature Cards */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .feature-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
    }
    .feature-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .feature-card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--secondary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 16px;
    }
    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text);
    }
    .feature-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 0;
    }
    /* Update List */
    .update-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .update-item {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 14px 18px;
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      transition: all var(--transition);
    }
    .update-item:hover {
      border-color: rgba(255,90,54,0.3);
      box-shadow: var(--shadow-sm);
    }
    .update-date {
      font-size: 13px;
      font-weight: 600;
      color: var(--accent);
      min-width: 80px;
      flex-shrink: 0;
    }
    .update-title {
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      flex: 1;
    }
    .update-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--accent);
      flex-shrink: 0;
    }
    .update-link:hover { color: var(--accent-hover); text-decoration: underline; }
    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all var(--transition);
    }
    .faq-item:hover { border-color: rgba(255,90,54,0.25); }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 16px 20px;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      user-select: none;
      transition: color var(--transition);
    }
    .faq-question:hover { color: var(--accent); }
    .faq-icon {
      flex-shrink: 0;
      font-size: 18px;
      color: var(--accent);
      transition: transform var(--transition);
    }
    .faq-item.open .faq-icon { transform: rotate(45deg); }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s cubic-bezier(0.4,0,0.2,1);
    }
    .faq-answer-inner {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    /* CTA Section */
    .cta-section {
      background: var(--primary);
      border-radius: var(--radius-xl);
      padding: 48px 40px;
      text-align: center;
      position: relative;
      overflow: hidden;
      margin-top: 10px;
    }
    .cta-section::before {
      content: '';
      position: absolute;
      top: -120px;
      right: -120px;
      width: 400px;
      height: 400px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(255,90,54,0.14) 0%, transparent 60%);
      pointer-events: none;
    }
    .cta-section::after {
      content: '';
      position: absolute;
      bottom: -100px;
      left: -80px;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0,194,168,0.1) 0%, transparent 60%);
      pointer-events: none;
    }
    .cta-section h2 {
      font-size: 28px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 12px;
      position: relative;
      z-index: 1;
    }
    .cta-section p {
      font-size: 15px;
      color: rgba(255,255,255,0.72);
      margin-bottom: 28px;
      max-width: 520px;
      margin-left: auto;
      margin-right: auto;
      position: relative;
      z-index: 1;
    }
    .cta-form {
      display: flex;
      gap: 10px;
      max-width: 420px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
      flex-wrap: wrap;
      justify-content: center;
    }
    .cta-form input {
      flex: 1;
      min-width: 200px;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255,255,255,0.2);
      background: rgba(255,255,255,0.1);
      color: #fff;
      outline: none;
      transition: all var(--transition);
    }
    .cta-form input::placeholder { color: rgba(255,255,255,0.4); }
    .cta-form input:focus {
      border-color: var(--accent);
      background: rgba(255,255,255,0.16);
      box-shadow: 0 0 0 3px rgba(255,90,54,0.2);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      transition: all var(--transition);
      line-height: 1.4;
      letter-spacing: 0.2px;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 14px rgba(255,90,54,0.3);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255,90,54,0.4);
    }
    .btn-secondary {
      background: transparent;
      color: #fff;
      border: 1.5px solid rgba(255,255,255,0.35);
    }
    .btn-secondary:hover {
      background: rgba(255,255,255,0.12);
      border-color: rgba(255,255,255,0.6);
      transform: translateY(-2px);
    }
    .btn-sm { padding: 9px 16px; font-size: 14px; border-radius: 6px; }
    /* Related Category Cards */
    .related-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }
    .related-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px 28px;
      box-shadow: var(--shadow-sm);
      transition: all var(--transition);
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .related-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(255,90,54,0.25);
    }
    .related-card-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: var(--secondary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      flex-shrink: 0;
    }
    .related-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 4px;
      color: var(--text);
    }
    .related-card p {
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 0;
    }
    /* Footer */
    .site-footer {
      background: var(--primary);
      color: rgba(255,255,255,0.8);
      padding: 48px 0 28px;
      margin-top: 48px;
      border-top: 1px solid rgba(255,255,255,0.06);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1fr;
      gap: 36px;
      padding-bottom: 32px;
      border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    .footer-brand h4 {
      color: #fff;
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 12px;
    }
    .footer-brand h4 span { color: var(--accent); }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255,255,255,0.55);
      max-width: 320px;
    }
    .footer-col h5 {
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .footer-col a, .footer-col span {
      display: block;
      font-size: 14px;
      color: rgba(255,255,255,0.55);
      margin-bottom: 8px;
      transition: color var(--transition);
    }
    .footer-col a:hover { color: var(--accent); }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 20px;
      font-size: 13px;
      color: rgba(255,255,255,0.45);
    }
    .footer-bottom a { color: rgba(255,255,255,0.55); }
    .footer-bottom a:hover { color: var(--accent); }
    /* Responsive */
    @media (max-width: 1024px) {
      .phone-grid { grid-template-columns: repeat(3, 1fr); }
      .feature-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
    }
    @media (max-width: 768px) {
      .site-header .container { height: auto; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; }
      .main-nav {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 2px;
        padding-top: 10px;
        padding-bottom: 10px;
        order: 10;
      }
      .main-nav.open { display: flex; }
      .main-nav a { width: 100%; padding: 10px 14px; text-align: left; }
      .nav-toggle { display: flex; }
      .phone-grid { grid-template-columns: repeat(2, 1fr); }
      .feature-grid { grid-template-columns: 1fr; }
      .related-grid { grid-template-columns: 1fr; }
      .category-header h1 { font-size: 28px; }
      .section-title { font-size: 22px; }
      .section { padding: 36px 0; }
      .cta-section { padding: 36px 20px; }
      .cta-section h2 { font-size: 22px; }
      .footer-grid { grid-template-columns: 1fr; gap: 24px; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .update-item { flex-wrap: wrap; gap: 8px; }
    }
    @media (max-width: 520px) {
      .phone-grid { grid-template-columns: 1fr; }
      .filter-group { flex-direction: column; align-items: flex-start; }
      .filter-label { min-width: auto; }
      .category-header h1 { font-size: 24px; }
      .section-title { font-size: 20px; }
      .container { padding: 0 16px; }
    }

/* roulang page: category2 */
:root {
  --primary: #101820;
  --primary-soft: #1A2634;
  --accent: #FF5A36;
  --accent-hover: #E84428;
  --secondary: #00C2A8;
  --secondary-soft: #E6FAF6;
  --bg: #F4F6F8;
  --bg-alt: #EEF1F4;
  --card-bg: #FFFFFF;
  --text: #1A2233;
  --text-secondary: #667085;
  --text-light: #9AA5B1;
  --border: #E2E8F0;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 2px 10px rgba(16,24,32,0.04);
  --shadow-md: 0 8px 24px rgba(16,24,32,0.10);
  --shadow-lg: 0 20px 48px rgba(16,24,32,0.14);
  --font-sans: 'PingFang SC','Microsoft YaHei','Noto Sans SC','Helvetica Neue',Arial,sans-serif;
  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --container: 1280px;
}
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { text-decoration: none; color: inherit; transition: color var(--transition), background var(--transition); }
button { font-family: var(--font-sans); cursor: pointer; border: none; background: none; }
input,textarea,select { font-family: var(--font-sans); font-size: 15px; }
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== Header / Navigation ========== */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 2px 12px rgba(16,24,32,0.18);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 19px;
  color: #fff;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  font-weight: 900;
  flex-shrink: 0;
}
.logo span { color: var(--accent); }
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.main-nav a {
  color: rgba(255,255,255,0.82);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  position: relative;
  white-space: nowrap;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: width var(--transition);
}
.main-nav a:hover { color: #fff; }
.main-nav a:hover::after { width: 60%; }
.main-nav a.active { color: #fff; background: rgba(255,90,54,0.18); }
.main-nav a.active::after { width: 60%; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: 6px;
  background: rgba(255,255,255,0.1);
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all var(--transition);
}

/* ========== 分类页面包屑与标题区 ========== */
.cat-hero {
  background: linear-gradient(135deg, #101820 0%, #1A2634 50%, #1F2E3D 100%);
  padding: 48px 0 44px;
  position: relative;
  overflow: hidden;
}
.cat-hero::after {
  content: '';
  position: absolute;
  top: -150px;
  right: -180px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,90,54,0.10) 0%, transparent 65%);
  pointer-events: none;
}
.cat-hero .container {
  position: relative;
  z-index: 1;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: rgba(255,255,255,0.7);
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: rgba(255,255,255,0.35); }
.breadcrumb .current { color: var(--accent); font-weight: 500; }
.cat-hero h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: 0.3px;
}
.cat-hero .cat-desc {
  font-size: 15px;
  color: rgba(255,255,255,0.72);
  line-height: 1.8;
  max-width: 680px;
  margin-bottom: 0;
}

/* ========== Section 通用 ========== */
.section {
  padding: 60px 0;
  position: relative;
}
.section-alt {
  background: var(--bg-alt);
}
.section-head {
  text-align: center;
  margin-bottom: 36px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 10px;
  letter-spacing: 0.3px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ========== 筛选标签栏 ========== */
.filter-bar {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 32px;
  box-shadow: var(--shadow-sm);
}
.filter-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-right: 12px;
  white-space: nowrap;
}
.filter-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.filter-tag {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-secondary);
  transition: all var(--transition);
  white-space: nowrap;
}
.filter-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: #fff;
}
.filter-tag.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.filter-tag:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.filter-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}
.filter-group:last-child { margin-bottom: 0; }

/* ========== 手机卡片列表 ========== */
.phone-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.phone-card {
  background: var(--card-bg);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.phone-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.phone-card-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-alt);
}
.phone-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.phone-card:hover .phone-card-img img {
  transform: scale(1.05);
}
.phone-card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.phone-badge {
  display: inline-block;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 4px;
  color: #fff;
}
.phone-badge.new { background: #00C2A8; }
.phone-badge.hot { background: #FF5A36; }
.phone-badge.value { background: #FFB020; }
.phone-badge.cn { background: #2563EB; }
.phone-card-body {
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.phone-card-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.4;
}
.phone-card-price {
  font-size: 15px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 12px;
}
.phone-card-specs {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.phone-card-specs li {
  font-size: 12px;
  color: var(--text-secondary);
  background: var(--bg);
  padding: 4px 10px;
  border-radius: 4px;
}
.phone-card-rating {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.stars {
  color: #FFB020;
  font-size: 14px;
  letter-spacing: 1px;
}
.phone-card-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  transition: all var(--transition);
}
.phone-card-link:hover {
  background: var(--accent);
  color: #fff;
}
.phone-card-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ========== 查看更多 ========== */
.view-more-wrap {
  text-align: center;
  margin-top: 28px;
}
.view-more-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--primary);
  color: var(--primary);
  transition: all var(--transition);
  background: transparent;
}
.view-more-link:hover {
  background: var(--primary);
  color: #fff;
}
.view-more-link:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ========== 热门标签云 ========== */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  max-width: 720px;
  margin: 0 auto;
}
.tag-pill {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  border-radius: 24px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  color: var(--text);
  transition: all var(--transition);
}
.tag-pill:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.tag-pill:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ========== 最新更新条目列表 ========== */
.update-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.update-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
  transition: all var(--transition);
}
.update-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}
.update-date {
  font-size: 13px;
  color: var(--text-light);
  min-width: 90px;
  text-align: center;
  padding: 6px 10px;
  background: var(--bg-alt);
  border-radius: 6px;
  font-weight: 500;
}
.update-content {
  flex: 1;
}
.update-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.5;
}
.update-title a:hover { color: var(--accent); }
.update-meta {
  font-size: 13px;
  color: var(--text-light);
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.update-meta span { display: inline-flex; align-items: center; gap: 4px; }
.update-empty {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-light);
  font-size: 15px;
}

/* ========== FAQ 手风琴 ========== */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
}
.accordion-item-custom {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  transition: all var(--transition);
}
.accordion-item-custom:hover {
  box-shadow: var(--shadow-sm);
}
.accordion-header-custom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}
.accordion-header-custom:hover { color: var(--accent); }
.accordion-icon {
  font-size: 18px;
  color: var(--text-light);
  transition: transform var(--transition);
  flex-shrink: 0;
}
.accordion-item-custom.open .accordion-icon {
  transform: rotate(45deg);
  color: var(--accent);
}
.accordion-body-custom {
  display: none;
  padding: 0 20px 16px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.accordion-item-custom.open .accordion-body-custom {
  display: block;
}

/* ========== CTA 订阅区 ========== */
.cta-section {
  background: linear-gradient(135deg, #101820 0%, #1A2634 100%);
  padding: 50px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255,90,54,0.08);
  pointer-events: none;
}
.cta-section .container {
  position: relative;
  z-index: 1;
}
.cta-section h2 {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
  letter-spacing: 0.3px;
}
.cta-section p {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 26px;
}
.cta-form {
  display: flex;
  gap: 10px;
  max-width: 440px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
}
.cta-input {
  flex: 1;
  min-width: 200px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: all var(--transition);
}
.cta-input::placeholder { color: rgba(255,255,255,0.45); }
.cta-input:focus {
  border-color: var(--accent);
  background: rgba(255,255,255,0.14);
  box-shadow: 0 0 0 3px rgba(255,90,54,0.2);
}
.cta-success {
  display: none;
  margin-top: 14px;
  color: var(--secondary);
  font-size: 14px;
  font-weight: 500;
}

/* ========== 相关分类推荐 ========== */
.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}
.related-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  align-items: flex-end;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.related-card-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.related-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(16,24,32,0.15) 0%, rgba(16,24,32,0.85) 100%);
  z-index: 1;
}
.related-card-content {
  position: relative;
  z-index: 2;
  padding: 20px 24px;
  width: 100%;
}
.related-card-content h3 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 4px;
  letter-spacing: 0.3px;
}
.related-card-content p {
  font-size: 13px;
  color: rgba(255,255,255,0.75);
  margin-bottom: 0;
  line-height: 1.6;
}
.related-card .related-link {
  position: absolute;
  inset: 0;
  z-index: 3;
}
.related-card .related-link:focus-visible {
  outline: 2px solid #fff;
  outline-offset: -4px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--primary);
  padding: 56px 0 20px;
  color: rgba(255,255,255,0.75);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 36px;
  margin-bottom: 36px;
}
.footer-brand h4 {
  font-size: 20px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: 0.3px;
}
.footer-brand h4 span { color: var(--accent); }
.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  line-height: 1.7;
  margin-bottom: 0;
}
.footer-col h5 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 8px;
  transition: all var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 16px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a {
  color: rgba(255,255,255,0.5);
}
.footer-bottom a:hover { color: var(--accent); }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .phone-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 48px 0; }
  .cat-hero { padding: 38px 0 36px; }
  .cat-hero h1 { font-size: 30px; }
}
@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    position: fixed;
    top: 0;
    right: -280px;
    width: 280px;
    height: 100vh;
    background: var(--primary);
    flex-direction: column;
    align-items: stretch;
    padding: 80px 20px 20px;
    gap: 4px;
    transition: right var(--transition);
    z-index: 99;
    box-shadow: -4px 0 20px rgba(0,0,0,0.25);
    overflow-y: auto;
  }
  .main-nav.open { right: 0; }
  .main-nav a {
    display: block;
    padding: 14px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
    color: rgba(255,255,255,0.85);
  }
  .main-nav a.active { background: rgba(255,90,54,0.18); color: #fff; }
  .main-nav a::after { display: none; }
  .site-header .container { height: 60px; }
  .logo { font-size: 17px; }
  .logo-icon { width: 34px; height: 34px; font-size: 16px; }
  .section { padding: 40px 0; }
  .cat-hero { padding: 32px 0 30px; }
  .cat-hero h1 { font-size: 26px; }
  .cat-hero .cat-desc { font-size: 14px; }
  .section-head h2 { font-size: 24px; }
  .phone-grid { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .filter-bar { padding: 14px 14px; }
}
@media (max-width: 520px) {
  .container { padding: 0 14px; }
  .cat-hero h1 { font-size: 22px; }
  .phone-card-body { padding: 14px 14px 16px; }
  .phone-card-name { font-size: 16px; }
  .cta-section { padding: 36px 0; }
  .cta-section h2 { font-size: 22px; }
  .update-item { flex-direction: column; gap: 8px; }
  .update-date { min-width: auto; display: inline-block; text-align: left; }
}