:root {
  --primary: #f43f5e;
  --primary-dark: #be123c;
  --primary-light: #fda4af;
  --secondary: #8b5cf6;
  --accent: #f59e0b;
  --bg: #fefcfb;
  --surface: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.72);
  --text: #1e1b1e;
  --text-light: #6b7280;
  --border: #f3e8e8;
  --shadow: 0 4px 20px rgba(244, 63, 94, 0.08);
  --shadow-hover: 0 12px 40px rgba(244, 63, 94, 0.16);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --gradient-hero: linear-gradient(135deg, #fef2f2 0%, #fff1f2 50%, #fce7f3 100%);
  --gradient-primary: linear-gradient(135deg, #f43f5e 0%, #be123c 100%);
  --gradient-accent: linear-gradient(135deg, #fce7f3 0%, #fbcfe8 100%);
  --glass-blur: blur(16px);
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body.dark-mode {
  --bg: #121212;
  --surface: #1e1e1e;
  --surface-glass: rgba(30, 30, 30, 0.78);
  --text: #f0e6e6;
  --text-light: #a1a1aa;
  --border: #2d2d2d;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.6);
  --gradient-hero: linear-gradient(135deg, #1a1214 0%, #1e1418 50%, #2a1a1e 100%);
}

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

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

body {
  font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition), color var(--transition);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.navbar.scrolled {
  box-shadow: 0 2px 20px rgba(244, 63, 94, 0.06);
}

body.dark-mode .navbar {
  background: var(--surface-glass);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  letter-spacing: -0.5px;
  transition: transform var(--transition), opacity var(--transition);
}

.logo:hover {
  transform: scale(1.03);
  opacity: 0.9;
}

.logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  transition: transform var(--transition);
}

.logo:hover svg {
  transform: rotate(-8deg) scale(1.08);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 2px;
  transition: width var(--transition);
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--border);
  border-radius: 40px;
  padding: 6px 14px;
  transition: box-shadow var(--transition), background var(--transition);
}

.search-box:focus-within {
  box-shadow: 0 0 0 3px rgba(244, 63, 94, 0.15);
  background: var(--surface);
}

.search-box input {
  border: none;
  background: transparent;
  outline: none;
  font-size: 0.9rem;
  color: var(--text);
  width: 140px;
  font-family: inherit;
  transition: width var(--transition);
}

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

.search-box input:focus {
  width: 180px;
}

.search-box svg {
  width: 18px;
  height: 18px;
  fill: var(--text-light);
  flex-shrink: 0;
  transition: fill var(--transition);
}

.search-box:focus-within svg {
  fill: var(--primary);
}

.theme-toggle {
  background: var(--border);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
  color: var(--text);
  flex-shrink: 0;
}

.theme-toggle:hover {
  background: var(--primary-light);
  transform: rotate(20deg) scale(1.08);
}

.theme-toggle:active {
  transform: rotate(20deg) scale(0.95);
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background var(--transition);
}

.mobile-menu-btn:hover {
  background: var(--border);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 2px;
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-light);
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
}

.breadcrumb a {
  color: var(--text-light);
  text-decoration: none;
  transition: color var(--transition);
}

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

.breadcrumb span {
  color: var(--text-light);
}

/* ===== Hero轮播 ===== */
.hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin-bottom: 48px;
  min-height: 380px;
  background: var(--gradient-hero);
  box-shadow: var(--shadow);
  transition: background var(--transition), box-shadow var(--transition);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(244, 63, 94, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-slide {
  display: none;
  padding: 60px 48px;
  align-items: center;
  gap: 40px;
  min-height: 380px;
}

.hero-slide.active {
  display: flex;
  animation: fadeIn 0.6s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: 2.6rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  color: var(--text);
  letter-spacing: -0.5px;
}

.hero-content h1 em {
  color: var(--primary);
  font-style: normal;
  position: relative;
}

.hero-content h1 em::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  right: 0;
  height: 8px;
  background: rgba(244, 63, 94, 0.15);
  border-radius: 4px;
  z-index: -1;
}

.hero-content p {
  font-size: 1.1rem;
  color: var(--text-light);
  margin-bottom: 24px;
  max-width: 520px;
  line-height: 1.8;
}

.hero-btn {
  display: inline-block;
  padding: 14px 32px;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition);
  font-size: 0.95rem;
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.3);
  position: relative;
  overflow: hidden;
}

.hero-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.hero-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(244, 63, 94, 0.4);
}

.hero-btn:hover::before {
  left: 100%;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-visual svg {
  width: 100%;
  max-width: 340px;
  height: auto;
  filter: drop-shadow(0 8px 24px rgba(244, 63, 94, 0.12));
  transition: transform 0.6s ease;
}

.hero-slide.active .hero-visual svg {
  animation: floatIn 0.8s ease 0.2s both;
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.hero-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 2;
}

.hero-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--primary-light);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), width var(--transition);
  padding: 0;
}

.hero-dots button.active {
  background: var(--primary);
  transform: scale(1.2);
  width: 24px;
  border-radius: 6px;
}

.hero-dots button:hover {
  background: var(--primary);
}

/* ===== 统计数字 ===== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}

.stat-item {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}

.stat-item:hover::before {
  opacity: 1;
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 6px;
}

/* ===== 通用区块 ===== */
section {
  margin-bottom: 64px;
}

.section-header {
  margin-bottom: 32px;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
  letter-spacing: -0.3px;
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: 2px;
  margin-top: 10px;
  transition: width var(--transition);
}

.section-header:hover h2::after {
  width: 80px;
}

.section-header p {
  color: var(--text-light);
  font-size: 1rem;
  max-width: 640px;
  line-height: 1.8;
}

/* ===== 卡片网格 ===== */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.card {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 28px 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  position: relative;
  overflow: hidden;
}

.card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

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

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(-5deg);
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.2);
}

.card-icon svg {
  width: 24px;
  height: 24px;
  fill: var(--primary);
  transition: fill var(--transition);
}

.card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text);
  line-height: 1.45;
}

.card p {
  font-size: 0.93rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 文章列表 ===== */
.article-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
}

.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--gradient-primary);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition);
  border-radius: 0 2px 2px 0;
}

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

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

.article-meta {
  display: flex;
  gap: 12px;
  font-size: 0.8rem;
  color: var(--text-light);
  margin-bottom: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.article-meta .tag {
  background: #fce7f3;
  color: var(--primary-dark);
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

body.dark-mode .article-meta .tag {
  background: #3b1a1a;
  color: var(--primary-light);
}

.article-card:hover .article-meta .tag {
  background: var(--primary);
  color: #fff;
}

.article-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.45;
}

.article-card h3 a {
  color: var(--text);
  text-decoration: none;
  transition: color var(--transition);
}

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

.article-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  flex: 1;
  margin-bottom: 14px;
  line-height: 1.7;
}

.read-more {
  color: var(--primary);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap var(--transition), color var(--transition);
  align-self: flex-start;
}

.read-more:hover {
  gap: 10px;
  color: var(--primary-dark);
}

/* ===== FAQ ===== */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--surface);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: box-shadow var(--transition), border-color var(--transition);
}

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

.faq-item.open {
  border-color: var(--primary-light);
  box-shadow: 0 4px 20px rgba(244, 63, 94, 0.1);
}

.faq-question {
  width: 100%;
  background: none;
  border: none;
  padding: 20px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  font-family: inherit;
  gap: 16px;
  transition: color var(--transition), background var(--transition);
}

.faq-question:hover {
  color: var(--primary);
  background: rgba(244, 63, 94, 0.03);
}

.faq-question svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: transform var(--transition);
  fill: var(--primary);
}

.faq-item.open .faq-question svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 24px;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  max-height: 600px;
  padding: 0 24px 22px;
}

/* ===== HowTo ===== */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.howto-step {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid var(--border);
  position: relative;
  counter-increment: step;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

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

.howto-step::before {
  content: counter(step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 14px;
  box-shadow: 0 4px 12px rgba(244, 63, 94, 0.25);
  transition: transform var(--transition);
}

.howto-step:hover::before {
  transform: scale(1.1);
}

.howto-step h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.howto-step p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 联系信息 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
}

.contact-item {
  background: var(--surface);
  border-radius: var(--radius-sm);
  padding: 24px;
  border: 1px solid var(--border);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.contact-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-light);
}

.contact-item svg {
  width: 32px;
  height: 32px;
  fill: var(--primary);
  margin-bottom: 12px;
  transition: transform var(--transition);
}

.contact-item:hover svg {
  transform: scale(1.15) translateY(-2px);
}

.contact-item h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}

.contact-item p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* ===== 页脚 ===== */
footer {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 48px 0 32px;
  margin-top: 40px;
  transition: background var(--transition), border-color var(--transition);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 36px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-light);
  margin-top: 12px;
  max-width: 300px;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
  position: relative;
  display: inline-block;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

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

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

.footer-col ul li a {
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color var(--transition), padding-left var(--transition);
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  color: var(--text-light);
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(244, 63, 94, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), box-shadow var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px) scale(1.06);
  box-shadow: 0 8px 28px rgba(244, 63, 94, 0.5);
}

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

.back-to-top svg {
  width: 22px;
  height: 22px;
  fill: #fff;
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== 响应式 - 平板 ===== */
@media (max-width: 900px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--surface-glass);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    animation: slideDown 0.3s ease;
  }

  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    font-size: 1rem;
    padding: 8px 0;
    width: 100%;
    display: block;
  }

  .mobile-menu-btn {
    display: block;
  }

  .search-box {
    display: none;
  }

  .hero-slide {
    flex-direction: column;
    padding: 40px 24px;
    text-align: center;
    gap: 28px;
  }

  .hero-content h1 {
    font-size: 1.9rem;
  }

  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-visual {
    order: -1;
  }

  .hero-visual svg {
    max-width: 260px;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .article-list {
    grid-template-columns: 1fr;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

/* ===== 响应式 - 手机 ===== */
@media (max-width: 600px) {
  .container {
    padding: 0 16px;
  }

  .nav-inner {
    height: 60px;
  }

  .logo {
    font-size: 1.15rem;
  }

  .logo svg {
    width: 30px;
    height: 30px;
  }

  .nav-links {
    top: 60px;
  }

  .hero {
    border-radius: var(--radius);
    min-height: auto;
    margin-bottom: 36px;
  }

  .hero-slide {
    padding: 32px 20px;
    min-height: auto;
  }

  .hero-content h1 {
    font-size: 1.5rem;
    line-height: 1.3;
  }

  .hero-content p {
    font-size: 0.95rem;
  }

  .hero-btn {
    padding: 12px 26px;
    font-size: 0.9rem;
  }

  .hero-visual svg {
    max-width: 200px;
  }

  .hero-dots {
    bottom: 14px;
  }

  .stats {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 40px;
  }

  .stat-item {
    padding: 20px 12px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .stat-label {
    font-size: 0.8rem;
  }

  .section-header h2 {
    font-size: 1.35rem;
  }

  .section-header p {
    font-size: 0.92rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card {
    padding: 22px 18px;
  }

  .article-card {
    padding: 20px 18px;
  }

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

  .faq-question {
    padding: 16px 18px;
    font-size: 0.95rem;
  }

  .faq-item.open .faq-answer {
    padding: 0 18px 18px;
  }

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

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

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }

  section {
    margin-bottom: 48px;
  }
}

/* ===== 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;
  }
}

/* ===== 打印样式 ===== */
@media print {
  .navbar,
  .back-to-top,
  .hero-dots,
  .theme-toggle,
  .mobile-menu-btn,
  .search-box {
    display: none !important;
  }

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

  .card,
  .article-card,
  .faq-item,
  .howto-step,
  .contact-item {
    box-shadow: none;
    border: 1px solid #ddd;
  }

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