```css
/* ============================================
   黑料吃瓜 - amghbcz.cn
   吃瓜第一线，网红八卦实时看
   ============================================ */

/* ---------- 基础重置与变量 ---------- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #f7f8fc;
  --surface: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.72);
  --text: #141824;
  --text-secondary: #4a4f63;
  --text-muted: #7a7f96;
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #ff6b7a;
  --primary-glow: rgba(230, 57, 70, 0.18);
  --accent: #ffb703;
  --accent-dark: #fb8500;
  --accent-glow: rgba(255, 183, 3, 0.22);
  --border: #e2e5f0;
  --border-glass: rgba(255, 255, 255, 0.6);
  --shadow: 0 2px 12px rgba(20, 24, 36, 0.06);
  --shadow-lg: 0 8px 32px rgba(20, 24, 36, 0.10);
  --shadow-glow: 0 8px 40px rgba(230, 57, 70, 0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --nav-height: 64px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial,
    sans-serif;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-theme="dark"] {
  --bg: #0e1017;
  --surface: #1a1d2a;
  --surface-glass: rgba(26, 29, 42, 0.78);
  --text: #e8eaf2;
  --text-secondary: #a8adc4;
  --text-muted: #6b7192;
  --border: #2a2e42;
  --border-glass: rgba(255, 255, 255, 0.08);
  --primary-glow: rgba(230, 57, 70, 0.28);
  --accent-glow: rgba(255, 183, 3, 0.18);
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 8px 40px rgba(230, 57, 70, 0.28);
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  transition: background var(--transition-base), color var(--transition-base);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
}

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

/* 滚动条美化 */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 5px;
  border: 2px solid var(--bg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ---------- 容器与布局 ---------- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
  position: relative;
}

.section-alt {
  background: var(--surface);
  transition: background var(--transition-base);
}

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-header h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
  color: var(--text);
  line-height: 1.25;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  font-size: 1.05rem;
  line-height: 1.7;
}

.section-tag {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
  padding: 5px 16px;
  background: var(--primary-glow);
  border-radius: 20px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ---------- 导航栏 ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--surface-glass);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-glass);
  transition: box-shadow var(--transition-base), background var(--transition-base);
}

.nav.scrolled {
  box-shadow: var(--shadow);
  background: var(--surface-glass);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  gap: 16px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--text);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.logo:hover {
  transform: scale(1.02);
  color: var(--text);
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.15rem;
  font-weight: 900;
  box-shadow: 0 4px 14px var(--primary-glow);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.logo:hover .logo-mark {
  transform: rotate(-6deg) scale(1.05);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-links a {
  padding: 8px 15px;
  border-radius: 10px;
  font-size: 0.92rem;
  color: var(--text-secondary);
  font-weight: 500;
  transition: all var(--transition-fast);
  white-space: nowrap;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 2px;
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

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

.nav-links a:hover::after {
  width: 60%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.icon-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle, var(--primary-glow), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

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

.icon-btn:hover::before {
  opacity: 1;
}

.icon-btn:active {
  transform: scale(0.94);
}

.mobile-toggle {
  display: none;
}

/* ---------- 搜索框 ---------- */
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}

.search-box input {
  width: 180px;
  padding: 8px 38px 8px 14px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  font-size: 0.88rem;
  outline: none;
  transition: all var(--transition-base);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.search-box input:focus {
  width: 230px;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--surface);
}

.search-box button {
  position: absolute;
  right: 8px;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border-radius: 50%;
  transition: all var(--transition-fast);
}

.search-box button:hover {
  color: var(--primary);
  background: var(--primary-glow);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.breadcrumb li::after {
  content: '/';
  margin-left: 6px;
  color: var(--text-muted);
}

.breadcrumb li:last-child::after {
  display: none;
}

.breadcrumb a {
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

/* ---------- Banner ---------- */
.banner {
  position: relative;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  color: #fff;
  overflow: hidden;
}

.banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 20% 50%, rgba(230, 57, 70, 0.35), transparent 50%),
    radial-gradient(circle at 80% 30%, rgba(255, 183, 3, 0.22), transparent 50%),
    radial-gradient(circle at 50% 90%, rgba(15, 52, 96, 0.5), transparent 60%);
  pointer-events: none;
}

.banner::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  opacity: 0.6;
}

.banner-slides {
  position: relative;
  z-index: 1;
}

.banner-slide {
  display: none;
  padding: 90px 0 110px;
  min-height: 540px;
  align-items: center;
}

.banner-slide.active {
  display: block;
  animation: fadeInUp 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 22px;
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  margin-bottom: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  letter-spacing: 0.02em;
}

.banner-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s infinite;
  box-shadow: 0 0 10px var(--accent);
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.4;
    transform: scale(0.85);
  }
}

.banner h1 {
  font-size: clamp(1.8rem, 4.8vw, 3.4rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin-bottom: 22px;
}

.banner h1 .highlight {
  background: linear-gradient(135deg, var(--accent) 0%, var(--primary-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
}

.banner p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.82);
  max-width: 600px;
  margin-bottom: 36px;
  line-height: 1.8;
}

.banner-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.95rem;
  transition: all var(--transition-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 30%, rgba(255, 255, 255, 0.2) 50%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
}

.btn:hover::after {
  transform: translateX(100%);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 4px 18px rgba(230, 57, 70, 0.4);
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(230, 57, 70, 0.5);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  transform: translateY(-3px);
  border-color: rgba(255, 255, 255, 0.4);
}

.banner-stats {
  display: flex;
  gap: 44px;
  margin-top: 44px;
  flex-wrap: wrap;
}

.banner-stat .num {
  font-size: 1.9rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 16px var(--accent-glow);
}

.banner-stat .label {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.65);
  margin-top: 2px;
}

.banner-dots {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 2;
}

.banner-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  transition: all var(--transition-base);
  padding: 0;
}

.banner-dots button:hover {
  background: rgba(255, 255, 255, 0.6);
}

.banner-dots button.active {
  background: var(--accent);
  width: 30px;
  border-radius: 5px;
  box-shadow: 0 0 12px var(--accent-glow);
}

/* ---------- 卡片网格 ---------- */
.grid {
  display: grid;
  gap: 24px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  transition: transform var(--transition-base);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-4deg);
}

.card h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
  line-height: 1.4;
}

.card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.75;
}

/* ---------- 品牌介绍 ---------- */
.brand-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.brand-visual {
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(135deg, #1a1a2e, #0f3460);
  padding: 44px;
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.brand-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(230, 57, 70, 0.3), transparent 60%),
    radial-gradient(circle at 20% 80%, rgba(255, 183, 3, 0.15), transparent 50%);
}

.brand-visual::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 20px 20px;
}

.brand-visual-content {
  position: relative;
  z-index: 1;
  color: #fff;
}

.brand-visual-content .big-num {
  font-size: 2.8rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px var(--accent-glow);
}

.brand-visual-content .big-label {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 26px;
  letter-spacing: 0.02em;
}

.brand-text h2 {
  font-size: clamp(1.5rem, 3vw, 1.9rem);
  font-weight: 800;
  margin-bottom: 18px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.brand-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 0.95rem;
  line-height: 1.85;
}

.brand-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 28px;
}

.brand-feature {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text);
  transition: transform var(--transition-fast);
}

.brand-feature:hover {
  transform: translateX(4px);
}

.brand-feature .check {
  color: var(--primary);
  font-weight: 900;
  font-size: 0.95rem;
  flex-shrink: 0;
}

/* ---------- 文章列表 ---------- */
.article-list {
  display: grid;
  gap: 20px;
}

.article-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  transition: all var(--transition-base);
  display: flex;
  gap: 22px;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
}

.article-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

.article-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateX(6px);
  border-color: transparent;
}

.article-item:hover::before {
  transform: scaleY(1);
}

.article-thumb {
  width: 104px;
  height: 104px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 900;
  font-size: 0.75rem;
  text-align: center;
  padding: 8px;
  line-height: 1.4;
  letter-spacing: 0.03em;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 4px 16px var(--primary-glow);
}

.article-item:hover .article-thumb {
  transform: scale(1.04) rotate(-2deg);
  box-shadow: 0 8px 24px var(--primary-glow);
}

.article-body {
  flex: 1;
  min-width: 0;
}

.article-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.article-meta span,
.article-meta time {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.article-body h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
  line-height: 1.5;
}

.article-body h3 a {
  color: var(--text);
  transition: color var(--transition-fast);
}

.article-body h3 a:hover {
  color: var(--primary);
}

.article-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
  line-height: 1.75;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-more {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.article-more:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all var(--transition-base);
}

.faq-item:hover {
  border-color: var(--primary-light);
}

.faq-item.open {
  border-color: var(--primary);
  box-shadow: var(--shadow-glow);
}

.faq-question {
  width: 100%;
  padding: 22px 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  text-align: left;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text);
  transition: color var(--transition-fast);
  line-height: 1.5;
}

.faq-question:hover {
  color: var(--primary);
}

.faq-icon {
  width: 26px;
  height: 26px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
  font-weight: 900;
  color: var(--primary);
  transition: transform var(--transition-base), background var(--transition-base);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary-glow);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.faq-answer-inner {
  padding: 0 26px 24px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.85;
  border-top: 1px solid var(--border);
  padding-top: 18px;
  margin-top: 0;
}

/* ---------- HowTo ---------- */
.howto-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.howto-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  transition: all var(--transition-base);
  overflow: hidden;
}

.howto-step::after {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--primary-glow);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.howto-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.howto-step:hover::after {
  opacity: 1;
}

.howto-step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1rem;
  margin-bottom: 16px;
  box-shadow: 0 4px 14px var(--primary-glow);
  transition: transform var(--transition-base);
  position: relative;
  z-index: 1;
}

.howto-step:hover .howto-step-num {
  transform: scale(1.1) rotate(-6deg);
}

.howto-step h4 {
  font-size: 1.02rem;
  font-weight: 700;
  margin-bottom: 10px;
  position: relative;
  z-index: 1;
}

.howto-step p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.8;
  position: relative;
  z-index: 1;
}

/* ---------- 客户评价 ---------- */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  position: relative;
  transition: all var(--transition-base);
  overflow: hidden;
}

.review-card::before {
  content: '"';
  position: absolute;
  top: 8px;
  right: 22px;
  font-size: 4.5rem;
  font-weight: 900;
  color: var(--primary);
  opacity: 0.08;
  line-height: 1;
  font-family: Georgia, serif;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.review-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.review-card:hover::before {
  opacity: 0.16;
  transform: scale(1.1);
}

.review-stars {
  color: var(--accent);
  font-size: 0.9rem;
  margin-bottom: 14px;
  letter-spacing: 3px;
  text-shadow: 0 2px 8px var(--accent-glow);
}

.review-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.85;
  position: relative;
  z-index: 1;
}

.review-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 0.9rem;
  flex-shrink: 0;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.review-name {
  font-weight: 700;
  font-size: 0.88rem;
}

.review-role {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ---------- 联系我们 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.contact-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition-base);
}

.contact-item:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
  border-color: transparent;
}

.contact-icon {
  width: 46px;
  height: 46px;
  border-radius: 13px;
  flex-shrink: 0;
  background: var(--primary-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.15rem;
  transition: transform var(--transition-base);
}

.contact-item:hover .contact-icon {
  transform: scale(1.08) rotate(-4deg);
}

.contact-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 5px;
}

.contact-item p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---------- 地图 ---------- */
.map-placeholder {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  text-align: center;
  transition: all var(--transition-base);
}

.map-placeholder:hover {
  box-shadow: var(--shadow-lg);
}

.map-placeholder svg {
  margin: 0 auto 20px;
  max-width: 220px;
  border-radius: var(--radius-sm);
}

.map-placeholder h3 {
  margin-bottom: 8px;
  font-size: 1rem;
  font-weight: 700;
}

.map-placeholder p {
  color: var(--text-secondary);
  font-size: 0.88rem;
}

/* ---------- 页脚 ---------- */
.footer {
  background: #0e1017;
  color: rgba(255, 255, 255, 0.75);
  padding: 72px 0 36px;
  font-size: 0.88rem;
  position: relative;
  overflow: hidden;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  opacity: 0.5;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 44px;
  margin-bottom: 52px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 18px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 16px;
  max-width: 320px;
  line-height: 1.8;
  font-size: 0.85rem;
}

.footer h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}

.footer ul li {
  margin-bottom: 11px;
}

.footer ul a {
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.85rem;
  transition: all var(--transition-fast);
  display: inline-block;
}

.footer ul a:hover {
  color: var(--accent);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 26px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  font-size: 0.82rem;
  color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.6);
}

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

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  bottom: 36px;
  right: 36px;
  z-index: 999;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 18px rgba(230, 57, 70, 0.45);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.9);
  transition: all var(--transition-base);
  font-size: 1.15rem;
  font-weight: 700;
}

.back-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.back-top:hover {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 10px 28px rgba(230, 57, 70, 0.55);
  color: #fff;
}

.back-top:active {
  transform: translateY(-2px) scale(0.98);
}

/* ---------- 滚动动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
    transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 依次延迟 */
.reveal:nth-child(1) { transition-delay: 0s; }
.reveal:nth-child(2) { transition-delay: 0.06s; }
.reveal:nth-child(3) { transition-delay: 0.12s; }
.reveal:nth-child(4) { transition-delay: 0.18s; }
.reveal:nth-child(5) { transition-delay: 0.24s; }
.reveal:nth-child(6) { transition-delay: 0.3s; }

/* ---------- 移动菜单 ---------- */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(14, 16, 23, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.mobile-menu.open {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.mobile-menu a {
  color: #fff;
  font-size: 1.25rem;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 14px;
  transition: background var(--transition-fast), transform var(--transition-fast);
  width: 80%;
  max-width: 320px;
  text-align: center;
}

.mobile-menu a:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.03);
}

.mobile-close {
  position: absolute;
  top: 22px;
  right: 22px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  transition: all var(--transition-fast);
}

.mobile-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

/* ---------- 辅助类 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 响应式：1024px ---------- */
@media (max-width: 1024px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .brand-section {
    gap: 40px;
  }

  .banner-slide {
    padding: 70px 0 90px;
    min-height: 480px;
  }
}

/* ---------- 响应式：768px ---------- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
  }

  .search-box {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: 1fr;
  }

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

  .brand-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .banner-slide {
    padding: 56px 0 76px;
    min-height: auto;
  }

  .banner h1 {
    font-size: clamp(1.6rem, 7vw, 2.2rem);
  }

  .banner p {
    font-size: 1rem;
  }

  .banner-stats {
    gap: 26px;
    margin-top: 32px;
  }

  .banner-stat .num {
    font-size: 1.5rem;
  }

  .section {
    padding: 56px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-header h2 {
    font-size: 1.5rem;
  }

  .section-header p {
    font-size: 0.95rem;
  }

  .article-item {
    flex-direction: column;
    gap: 16px;
  }

  .article-thumb {
    width: 100%;
    height: 72px;
    font-size: 0.8rem;
  }

  .article-item:hover {
    transform: translateY(-4px);
  }

  .back-top {
    bottom: 22px;
    right: 22px;
    width: 46px;
    height: 46px;
  }

  .brand-visual {
    padding: 32px;
    min-height: 280px;
  }

  .brand-visual-content .big-num {
    font-size: 2.2rem;
  }

  .card {
    padding: 24px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 0.92rem;
  }

  .faq-answer-inner {
    padding: 16px 20px 20px;
  }

  .howto-step {
    padding: 24px;
  }

  .review-card {
    padding: 24px;
  }

  .contact-item {
    padding: 18px;
  }
}

/* ---------- 响应式：480px ---------- */
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .banner-cta {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .banner-stats {
    gap: 20px;
  }

  .banner-stat .num {
    font-size: 1.3rem;
  }

  .banner-stat .label {
    font-size: 0.78rem;
  }

  .logo {
    font-size: 1.05rem;
  }

  .logo-mark {
    width: 34px;
    height: 34px;
    font-size: 1rem;
  }

  .section {
    padding: 44px 0;
  }

  .brand-features {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 20px;
  }

  .article-item {
    padding: 20px;
  }

  .article-body h3 {
    font-size: 1rem;
  }

  .footer {
    padding: 52px 0 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .back-top {
    bottom: 16px;
    right: 16px;
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }

  .map-placeholder {
    padding: 24px;
  }
}

/* ---------- 打印样式 ---------- */
@media print {
  .nav,
  .back-top,
  .mobile-menu,
  .banner-dots,
  .banner-cta {
    display: none !important;
  }

  .banner {
    background: #fff;
    color: #000;
  }

  .banner h1 .highlight {
    -webkit-text-fill-color: #000;
    color: #000;
  }

  body {
    background: #fff;
    color: #000;
  }
}

/* ---------- 减少动画偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 高对比度模式 ---------- */
@media (prefers-contrast: high) {
  :root {
    --border: #000;
    --text-secondary: #000;
  }

  [data-theme="dark"] {
    --border: #fff;
    --text-secondary: #fff;
  }

  .card,
  .article-item,
  .faq-item,
  .howto-step,
  .review-card,
  .contact-item {
    border-width: 2px;
  }
}
```