/* ============================================
   问鼎WWW — 智驭乾坤
   设计系统：东方杂志风 × 玻璃态 × 温暖陶土色调
   Awwwards-inspired 独特视觉系统
   ============================================ */

:root {
  /* 核心色彩 — 温暖陶土 × 青瓷绿 */
  --bg: #fefcf7;
  --bg-alt: #f7f3eb;
  --bg-warm: #faf6ef;
  --text: #3e3733;
  --text-muted: #7a6f65;
  --text-light: #a0988e;
  --accent: #c25b4a;
  --accent-dark: #a3483a;
  --accent-light: #f0d9d3;
  --accent-glow: rgba(194, 91, 74, 0.12);
  --sage: #8b9d83;
  --sage-light: #e8efe5;
  --gold: #c4a87c;
  --gold-light: #f5efe3;
  --white: #ffffff;
  --border: #e8e2d8;
  --border-light: #f0ebe3;
  --shadow-sm: 0 1px 3px rgba(62, 55, 51, 0.06);
  --shadow-md: 0 4px 20px rgba(62, 55, 51, 0.08);
  --shadow-lg: 0 12px 40px rgba(62, 55, 51, 0.12);
  --shadow-glow: 0 0 0 4px rgba(194, 91, 74, 0.08);
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --font-heading: system-ui, 'PingFang SC', 'Noto Serif SC', 'Microsoft YaHei', serif;
  --font-body: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  font-size: 1rem;
}

/* ========== 核心布局 ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.section:nth-child(even) {
  background: var(--bg-alt);
}

/* 装饰性微纹理 — 偶数section添加微妙的顶部边框光晕 */
.section:nth-child(even)::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  max-width: 800px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  opacity: 0.6;
}

/* ========== 导航 — 固定顶部，玻璃态 ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(254, 252, 247, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.site-header.scrolled {
  box-shadow: var(--shadow-sm);
  background: rgba(254, 252, 247, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.01em;
  transition: var(--transition);
}

.logo:hover {
  color: var(--accent);
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), #d4786a);
  color: #fff;
  letter-spacing: 0;
  box-shadow: 0 2px 8px rgba(194, 91, 74, 0.25);
}

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

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  padding: 9px 22px !important;
  border-radius: 25px !important;
  color: #fff !important;
  font-weight: 600 !important;
  background: var(--accent);
  transition: var(--transition);
  box-shadow: 0 2px 10px rgba(194, 91, 74, 0.2);
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  background: var(--accent-dark);
  box-shadow: 0 4px 16px rgba(194, 91, 74, 0.3);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  width: 36px;
  height: 28px;
  justify-content: center;
  align-items: center;
  background: none;
  border: none;
  padding: 4px;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

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

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

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

/* ========== Hero — 杂志风不对称布局 ========== */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  position: relative;
  overflow: hidden;
}

/* 装饰性背景光斑 */
.hero::before {
  content: '';
  position: absolute;
  top: -15%;
  right: -8%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-light) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
  opacity: 0.5;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -10%;
  left: -5%;
  width: 350px;
  height: 350px;
  background: radial-gradient(circle, var(--sage-light) 0%, transparent 70%);
  border-radius: 50%;
  z-index: 0;
  opacity: 0.4;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 720px;
  position: relative;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 20px;
  background: var(--accent-light);
  color: var(--accent-dark);
  border: 1px solid rgba(194, 91, 74, 0.2);
}

.hero h1 {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  line-height: 1.15;
  margin-bottom: 22px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  color: var(--accent);
  position: relative;
  display: inline-block;
}

.hero h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 8px;
  background: var(--accent-light);
  border-radius: 4px;
  z-index: -1;
  opacity: 0.7;
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.7;
  max-width: 560px;
  margin-bottom: 36px;
  color: var(--text-muted);
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  border: 6px solid var(--white);
  transform: rotate(1deg);
  transition: var(--transition);
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.01);
  box-shadow: 0 20px 50px rgba(62, 55, 51, 0.15);
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ========== 按钮系统 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 30px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition);
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 3px 14px rgba(194, 91, 74, 0.25);
}

.btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: 0 6px 22px rgba(194, 91, 74, 0.35);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(194, 91, 74, 0.2);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--text);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
  box-shadow: var(--shadow-glow);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
  border-radius: 20px;
}

/* ========== 标签/标题系统 ========== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--accent);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  margin-bottom: 16px;
  font-weight: 750;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.25;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 44px;
  color: var(--text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ========== 卡片网格 — 玻璃态融合 ========== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.category-card {
  border-radius: var(--radius-lg);
  padding: 30px 26px;
  border: 1px solid var(--border-light);
  background: var(--white);
  transition: var(--transition);
  position: relative;
  cursor: pointer;
  box-shadow: var(--shadow-sm);
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  opacity: 0;
  transition: var(--transition);
}

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

.category-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 50px;
  height: 50px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: var(--accent-light);
  color: var(--accent);
  transition: var(--transition);
}

.category-card:hover .card-icon {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(194, 91, 74, 0.3);
}

.category-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}

.category-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}

.card-link::after {
  content: '→';
  transition: transform 0.3s ease;
}

.card-link:hover {
  color: var(--accent-dark);
}

.card-link:hover::after {
  transform: translateX(4px);
}

/* ========== 特性块 — 非对称网格 ========== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-block.reverse {
  direction: rtl;
}

.feature-block.reverse .feature-text {
  direction: ltr;
}

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-md);
  border: 5px solid var(--white);
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(194, 91, 74, 0.05), transparent 60%);
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
}

.feature-text h3 {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
}

.feature-text p {
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
}

.feature-list li::before {
  content: '✓';
  font-weight: 700;
  color: var(--accent);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  background: var(--accent-light);
  border-radius: 50%;
  font-size: 0.7rem;
  margin-top: 2px;
}

/* ========== 数据条 ========== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  text-align: center;
}

.stat-item {
  padding: 28px 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  background: var(--white);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0;
  transition: var(--transition);
}

.stat-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-item:hover::before {
  opacity: 1;
  width: 60px;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ========== 内容墙 ========== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.content-wall-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  background: var(--white);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

.content-wall-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.4s ease;
}

.content-wall-item:hover img {
  transform: scale(1.04);
}

.content-wall-body {
  padding: 22px 20px;
}

.content-wall-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
  line-height: 1.4;
}

.content-wall-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 10px;
}

.content-wall-body .meta {
  font-size: 0.78rem;
  color: var(--text-light);
  font-weight: 500;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: var(--transition);
  box-shadow: var(--shadow-sm);
}

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

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text);
  font-size: 1rem;
  gap: 16px;
  user-select: none;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 300;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.3s ease;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--accent-light);
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 22px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: all 0.35s ease;
  color: var(--text-muted);
  line-height: 1.7;
  font-size: 0.95rem;
}

.faq-item.open .faq-answer {
  display: block;
  padding: 0 22px 18px;
  max-height: 500px;
  opacity: 0.85;
}

.faq-item.open {
  border-color: var(--accent-light);
  box-shadow: var(--shadow-md);
  background: var(--bg-warm);
}

/* ========== CTA横幅 ========== */
.cta-banner {
  padding: 60px 32px;
  text-align: center;
  border-radius: var(--radius-xl);
  color: #fff;
  background: linear-gradient(135deg, var(--accent), #d4786a, #c25b4a);
  position: relative;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(194, 91, 74, 0.25);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -15%;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -20%;
  left: -10%;
  width: 250px;
  height: 250px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 750;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.05rem;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--accent);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  font-weight: 700;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  background: #fefcf7;
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.18);
  transform: translateY(-2px);
  color: var(--accent-dark);
}

/* ========== 页脚 ========== */
.site-footer {
  padding: 60px 0 28px;
  background: #f5f1ea;
  color: var(--text);
  border-top: 1px solid var(--border-light);
}

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

.footer-brand .logo {
  margin-bottom: 14px;
  font-size: 1.2rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 16px;
  color: var(--text);
}

.footer-col ul {
  list-style: none;
  padding: 0;
}

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

.footer-col ul li a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
  padding: 2px 0;
  display: inline-block;
}

.footer-col ul li a:hover {
  color: var(--accent);
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 44px;
  padding-top: 22px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* ========== 工具类 ========== */
.text-accent {
  color: var(--accent);
}

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

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.mt-0 {
  margin-top: 0;
}

.mb-0 {
  margin-bottom: 0;
}

.mt-2 {
  margin-top: 16px;
}

.mb-2 {
  margin-bottom: 16px;
}

/* ========== 响应式 — 768px ========== */
@media (max-width: 768px) {
  .hero .container {
    grid-template-columns: 1fr;
    gap: 36px;
    text-align: center;
  }

  .hero-content {
    order: 1;
    max-width: 100%;
  }

  .hero-image {
    order: 0;
    max-width: 400px;
    margin: 0 auto;
    transform: rotate(0deg);
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-buttons {
    justify-content: center;
  }

  .hero-eyebrow {
    margin-left: auto;
    margin-right: auto;
    display: table;
  }

  .section-label {
    justify-content: center;
  }

  .section-label::before {
    display: none;
  }

  .section-title {
    font-size: 1.7rem;
  }

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

  .feature-block.reverse {
    direction: ltr;
  }

  .feature-image {
    max-width: 480px;
    margin: 0 auto;
  }

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

  .feature-list li {
    justify-content: center;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
  }

  .stat-number {
    font-size: 2rem;
  }

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

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

  .footer-brand p {
    max-width: 100%;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: rgba(254, 252, 247, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    gap: 6px;
    z-index: 999;
  }

  .main-nav.open a {
    padding: 12px 16px;
    display: block;
    border-radius: var(--radius-sm);
  }

  .main-nav.open a:hover {
    background: var(--bg-alt);
  }

  .main-nav.open .nav-cta {
    text-align: center;
    margin-top: 8px;
    display: block;
    border-radius: 25px !important;
  }

  .content-wall {
    gap: 16px;
  }

  .cta-banner {
    padding: 44px 20px;
    border-radius: var(--radius-lg);
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }

  .cards-grid {
    gap: 16px;
  }
}

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

  .section {
    padding: 48px 0;
  }

  .hero {
    min-height: 60vh;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

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

  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .hero-buttons .btn {
    justify-content: center;
    text-align: center;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

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

  .footer-col ul li a:hover {
    transform: none;
  }

  .section-title {
    font-size: 1.45rem;
  }

  .section-desc {
    font-size: 0.9rem;
    margin-bottom: 28px;
  }

  .category-card {
    padding: 22px 18px;
  }

  .stat-item {
    padding: 20px 14px;
  }

  .stat-number {
    font-size: 1.7rem;
  }

  .content-wall-item img {
    height: 180px;
  }

  .cta-banner {
    padding: 36px 16px;
  }

  .cta-banner h2 {
    font-size: 1.35rem;
  }

  .faq-item .faq-question {
    padding: 14px 16px;
    font-size: 0.9rem;
  }

  .faq-item .faq-answer {
    font-size: 0.85rem;
  }

  .faq-item.open .faq-answer {
    padding: 0 16px 14px;
  }

  .header-inner {
    padding: 0 16px;
  }

  .logo {
    font-size: 1.1rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 0.9rem;
  }
}

/* ========== 微交互增强 ========== */
@media (hover: hover) {
  .category-card:active {
    transform: scale(0.98);
  }

  .btn:active {
    transform: scale(0.96);
  }

  .content-wall-item:active {
    transform: scale(0.97);
  }
}

/* ========== 打印样式 ========== */
@media print {
  .site-header,
  .cta-banner,
  .menu-toggle {
    display: none;
  }

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

  .section {
    padding: 20px 0;
  }
}