/* =============================================
   DESIGN SYSTEM — 网页版免费看片51
   Style: "Warm Editorial Neo-Paper"
   Palette: Cream #FFF9F0 / Coral #FF6B4A / Teal #1A8D8D
   ============================================= */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: #FFF9F0;
  color: #1E1B18;
  line-height: 1.6;
  font-size: 16px;
  letter-spacing: 0.01em;
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: #F5EFE6;
}

/* 装饰性圆点背景 */
.section::before {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 74, 0.08) 0%, transparent 70%);
  top: 40px;
  right: 60px;
  pointer-events: none;
}

/* =============================================
   导航 — 顶部固定
   ============================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 240, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 2px solid #1E1B18;
  box-shadow: 4px 4px 0 rgba(30, 27, 24, 0.15);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  font-size: 1.3rem;
  text-decoration: none;
  color: #1E1B18;
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 50% 50% 50% 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: #FF6B4A;
  color: #fff;
  transform: rotate(-8deg);
  transition: transform 0.3s;
}

.logo:hover .logo-icon {
  transform: rotate(0deg) scale(1.1);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: #1E1B18;
  position: relative;
  padding: 4px 0;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.main-nav a:not(.nav-cta)::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background: #FF6B4A;
  transition: width 0.3s cubic-bezier(0.65, 0, 0.35, 1);
}

.main-nav a:not(.nav-cta):hover {
  color: #FF6B4A;
}

.main-nav a:not(.nav-cta):hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px !important;
  border-radius: 50px !important;
  color: #fff !important;
  font-weight: 700 !important;
  background: #1A8D8D;
  box-shadow: 3px 3px 0 #1E1B18;
  border: 2px solid #1E1B18;
  transition: all 0.2s !important;
}

.nav-cta:hover {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 #1E1B18;
  color: #fff !important;
}

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

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 2px solid #1E1B18;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  box-shadow: 2px 2px 0 #1E1B18;
}

/* =============================================
   首页 Hero — 编辑式大排版
   ============================================= */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  background:
    linear-gradient(180deg, rgba(255, 107, 74, 0.05) 0%, transparent 100%),
    radial-gradient(ellipse at 80% 20%, rgba(26, 141, 141, 0.08) 0%, transparent 50%);
  padding-top: 72px;
}

.hero::before {
  content: '51';
  position: absolute;
  right: 20px;
  top: 40%;
  transform: translateY(-50%);
  font-size: 28vw;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 2px rgba(255, 107, 74, 0.15);
  z-index: 0;
  pointer-events: none;
  letter-spacing: -0.05em;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: #1A8D8D;
  color: #fff;
  text-transform: uppercase;
  border: 2px solid #1E1B18;
  box-shadow: 3px 3px 0 #1E1B18;
  transform: rotate(-2deg);
}

.hero h1 {
  font-size: 3.6rem;
  line-height: 1.1;
  margin-bottom: 22px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #1E1B18;
}

.hero h1 .highlight {
  color: #FF6B4A;
  position: relative;
  display: inline-block;
}

.hero h1 .highlight::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  width: 100%;
  height: 10px;
  background: rgba(255, 107, 74, 0.2);
  z-index: -1;
  border-radius: 4px;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-buttons {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: 24px 24px 24px 4px;
  overflow: hidden;
  border: 2px solid #1E1B18;
  box-shadow: 8px 8px 0 rgba(255, 107, 74, 0.3);
  position: relative;
  z-index: 1;
}

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

/* =============================================
   按钮
   ============================================= */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid #1E1B18;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.65, 0, 0.35, 1);
  box-shadow: 4px 4px 0 #1E1B18;
}

.btn:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 #1E1B18;
}

.btn:active {
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 #1E1B18;
}

.btn-primary {
  background: #FF6B4A;
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid #1E1B18;
  color: #1E1B18;
}

.btn-outline:hover {
  background: #1E1B18;
  color: #FFF9F0;
}

.btn-teal {
  background: #1A8D8D;
  color: #fff;
}

/* =============================================
   标签/标题 — 杂志风格
   ============================================= */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 4px;
  margin-bottom: 14px;
  color: #1A8D8D;
  text-transform: uppercase;
  position: relative;
  padding-left: 28px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 3px;
  background: #FF6B4A;
  border-radius: 2px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: #1E1B18;
}

.section-desc {
  max-width: 600px;
  opacity: 0.75;
  margin-bottom: 44px;
  font-size: 1rem;
  line-height: 1.7;
}

/* =============================================
   卡片网格 — Neo-Paper 层叠卡片
   ============================================= */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: 20px 20px 20px 4px;
  padding: 30px 28px;
  border: 2px solid #1E1B18;
  background: #fff;
  box-shadow: 6px 6px 0 rgba(30, 27, 24, 0.9);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, transparent 50%, rgba(255, 107, 74, 0.15) 50%);
  border-radius: 0 0 0 20px;
}

.category-card:nth-child(even) {
  border-radius: 20px 20px 4px 20px;
  box-shadow: -6px 6px 0 rgba(26, 141, 141, 0.4);
}

.category-card:nth-child(3n) {
  border-radius: 20px 4px 20px 20px;
  box-shadow: 6px -6px 0 rgba(255, 107, 74, 0.4);
}

.category-card:hover {
  transform: translate(-3px, -3px);
  box-shadow: 10px 10px 0 rgba(30, 27, 24, 0.9);
}

.category-card:nth-child(even):hover {
  box-shadow: -10px 10px 0 rgba(26, 141, 141, 0.5);
}

.category-card:nth-child(3n):hover {
  box-shadow: 10px -10px 0 rgba(255, 107, 74, 0.5);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 50% 50% 50% 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: #F5EFE6;
  border: 2px solid #1E1B18;
  color: #1E1B18;
  transform: rotate(-5deg);
  transition: transform 0.3s;
}

.category-card:nth-child(even) .card-icon {
  background: rgba(26, 141, 141, 0.15);
  border-radius: 8px 50% 50% 50%;
  transform: rotate(5deg);
}

.category-card:nth-child(3n) .card-icon {
  background: rgba(255, 107, 74, 0.15);
  border-radius: 50% 8px 50% 50%;
}

.category-card:hover .card-icon {
  transform: rotate(0deg) scale(1.1);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: 10px;
  color: #1E1B18;
}

.category-card p {
  font-size: 0.9rem;
  opacity: 0.7;
  margin-bottom: 16px;
  line-height: 1.6;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: #FF6B4A;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s;
}

.card-link:hover {
  gap: 8px;
}

.card-link::after {
  content: '→';
}

/* =============================================
   特性块
   ============================================= */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.feature-image {
  border-radius: 24px 24px 24px 4px;
  overflow: hidden;
  border: 2px solid #1E1B18;
  box-shadow: 8px 8px 0 rgba(26, 141, 141, 0.3);
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 70%, rgba(30, 27, 24, 0.2));
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  min-height: 340px;
}

.feature-text {
  padding: 20px 0;
}

.feature-text .section-title {
  font-size: 2.2rem;
}

.feature-list {
  list-style: none;
  margin-top: 20px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 1rem;
  font-weight: 500;
  border-bottom: 1px dashed rgba(30, 27, 24, 0.15);
}

.feature-list li:last-child {
  border-bottom: none;
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  color: #1A8D8D;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 141, 141, 0.12);
  border-radius: 50%;
  font-size: 0.8rem;
}

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

.stat-item {
  padding: 30px 20px;
  border-radius: 50% 50% 20px 20px;
  border: 2px solid #1E1B18;
  background: #fff;
  box-shadow: 4px 4px 0 #1E1B18;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.stat-item:nth-child(2) {
  border-radius: 20px 50% 50% 20px;
}

.stat-item:nth-child(3) {
  border-radius: 50% 20px 20px 50%;
}

.stat-item:nth-child(4) {
  border-radius: 20px 20px 50% 50%;
}

.stat-item:hover {
  transform: scale(1.04) rotate(-1deg);
  box-shadow: 6px 6px 0 rgba(255, 107, 74, 0.5);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: #FF6B4A;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.9rem;
  font-weight: 600;
  opacity: 0.65;
  margin-top: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.content-wall-item {
  border-radius: 16px 16px 16px 4px;
  overflow: hidden;
  border: 2px solid #1E1B18;
  background: #fff;
  box-shadow: 4px 4px 0 rgba(30, 27, 24, 0.85);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
}

.content-wall-item:hover {
  transform: translateY(-6px) rotate(-1deg);
  box-shadow: 8px 8px 0 rgba(255, 107, 74, 0.4);
}

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  display: block;
  border-bottom: 2px solid #1E1B18;
}

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

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.content-wall-body p {
  font-size: 0.85rem;
  opacity: 0.7;
  line-height: 1.6;
}

.content-wall-tag {
  display: inline-block;
  background: rgba(255, 107, 74, 0.12);
  color: #FF6B4A;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 12px;
  border-radius: 50px;
  margin-bottom: 12px;
  border: 1.5px solid rgba(255, 107, 74, 0.3);
}

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

.faq-item {
  border: 2px solid #1E1B18;
  border-radius: 14px 14px 14px 4px;
  margin-bottom: 16px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  box-shadow: 3px 3px 0 rgba(30, 27, 24, 0.6);
  transition: all 0.3s;
}

.faq-item:hover {
  box-shadow: 5px 5px 0 rgba(255, 107, 74, 0.4);
  transform: translate(-1px, -1px);
}

.faq-item.open {
  border-radius: 14px 14px 4px 14px;
  box-shadow: 5px 5px 0 rgba(26, 141, 141, 0.4);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 500;
  color: #FF6B4A;
  transition: transform 0.3s;
  flex-shrink: 0;
  line-height: 1;
}

.faq-item.open .faq-question::after {
  content: '−';
  color: #1A8D8D;
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  opacity: 0.75;
  line-height: 1.7;
  font-size: 0.95rem;
  border-top: 1px dashed rgba(30, 27, 24, 0.15);
  padding-top: 16px;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlideDown 0.3s ease;
}

@keyframes fadeSlideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 0.75;
    transform: translateY(0);
  }
}

/* =============================================
   CTA 横幅
   ============================================= */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: 24px 24px 24px 4px;
  background: linear-gradient(135deg, #1A8D8D 0%, #147B7B 50%, #FF6B4A 150%);
  color: #fff;
  border: 2px solid #1E1B18;
  box-shadow: 8px 8px 0 rgba(30, 27, 24, 0.3);
  position: relative;
  overflow: hidden;
}

.cta-banner::before,
.cta-banner::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.cta-banner::before {
  width: 200px;
  height: 200px;
  top: -80px;
  right: -60px;
}

.cta-banner::after {
  width: 140px;
  height: 140px;
  bottom: -50px;
  left: -40px;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  letter-spacing: -0.02em;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 480px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn {
  background: #FFF9F0;
  color: #1E1B18;
  border-color: #1E1B18;
  box-shadow: 4px 4px 0 rgba(30, 27, 24, 0.9);
  position: relative;
  z-index: 1;
}

.cta-banner .btn:hover {
  background: #FF6B4A;
  color: #fff;
  box-shadow: 2px 2px 0 rgba(30, 27, 24, 0.9);
}

/* =============================================
   页脚
   ============================================= */
.site-footer {
  padding: 72px 0 28px;
  background: #1E1B18;
  color: #FFF9F0;
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #FF6B4A 0%, #1A8D8D 50%, #FF6B4A 100%);
}

.site-footer .container {
  position: relative;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand .logo {
  color: #FFF9F0;
  margin-bottom: 16px;
}

.footer-brand .logo-icon {
  background: #FF6B4A;
}

.footer-brand p {
  opacity: 0.6;
  font-size: 0.9rem;
  max-width: 280px;
  line-height: 1.8;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: #FF6B4A;
  text-transform: uppercase;
  letter-spacing: 2px;
}

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

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  color: rgba(255, 249, 240, 0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul a:hover {
  color: #FFF9F0;
  transform: translateX(4px);
}

.footer-col ul a::before {
  content: '→';
  font-size: 0.8rem;
  opacity: 0;
  transition: opacity 0.2s;
}

.footer-col ul a:hover::before {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 249, 240, 0.15);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.5;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* =============================================
   工具类
   ============================================= */
.text-accent {
  color: #FF6B4A;
}

.text-teal {
  color: #1A8D8D;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  line-height: 1.8;
  font-size: 1.02rem;
}

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

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

/* 特色徽章 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 700;
  border: 1.5px solid currentColor;
}

.badge-coral {
  background: rgba(255, 107, 74, 0.1);
  color: #FF6B4A;
  border-color: rgba(255, 107, 74, 0.3);
}

.badge-teal {
  background: rgba(26, 141, 141, 0.1);
  color: #1A8D8D;
  border-color: rgba(26, 141, 141, 0.3);
}

/* 装饰滚动条 */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: #FFF9F0;
}

::-webkit-scrollbar-thumb {
  background: #FF6B4A;
  border-radius: 10px;
  border: 2px solid #FFF9F0;
}

::-webkit-scrollbar-thumb:hover {
  background: #1A8D8D;
}

/* 选中颜色 */
::selection {
  background: #FF6B4A;
  color: #fff;
}

/* 图片样式 */
img {
  max-width: 100%;
}

/* 分隔线 */
.divider-wave {
  height: 12px;
  background: url("data:image/svg+xml,%3Csvg width='100' height='12' viewBox='0 0 100 12' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0 6 C 25 -4, 75 16, 100 6' fill='none' stroke='%23FF6B4A' stroke-width='2'/%3E%3C/svg%3E") repeat-x;
  opacity: 0.4;
  margin: 20px 0;
}

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 3rem;
  }

  .feature-block {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 70px 0;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 70px;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

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

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

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

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

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 12px;
    right: 12px;
    width: auto;
    background: #FFF9F0;
    padding: 20px;
    border: 2px solid #1E1B18;
    border-radius: 16px 16px 16px 4px;
    box-shadow: 6px 6px 0 rgba(30, 27, 24, 0.6);
    gap: 16px;
    animation: slideDown 0.3s ease;
  }

  .main-nav.open .nav-cta {
    text-align: center;
  }

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

  .hero::before {
    font-size: 12rem;
    top: 20%;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .cta-banner h2 {
    font-size: 1.8rem;
  }

  .footer-bottom {
    flex-direction: column;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

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

  .section-title {
    font-size: 1.8rem;
  }

  .stat-item {
    border-radius: 20px !important;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .logo {
    font-size: 1.1rem;
  }
}

/* =============================================
   动画效果
   ============================================= */
@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.animate-float {
  animation: float 4s ease-in-out infinite;
}

@keyframes pulse-soft {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.03);
  }
}

.animate-pulse-soft {
  animation: pulse-soft 2s ease-in-out infinite;
}

/* 滚动入场动画 */
.scroll-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

/* 响应式修正：确保移动端导航 */
@media (max-width: 768px) {
  .main-nav a::after {
    display: none;
  }

  .main-nav a:hover {
    padding-left: 8px;
  }
}

/* 无障碍焦点 */
a:focus-visible,
button:focus-visible {
  outline: 3px solid #1A8D8D;
  outline-offset: 2px;
  border-radius: 4px;
}