:root {
  --bg: #FFF9EF;
  --bg-alt: #FFF0DC;
  --text: #2B2B2B;
  --primary: #E85B4A;
  --primary-dark: #C94632;
  --secondary: #1B7A77;
  --accent: #F4A629;
  --card: #FFFFFF;
  --border: #2B2B2B;
  --shadow-sm: 3px 3px 0 var(--border);
  --shadow-md: 6px 6px 0 var(--border);
  --shadow-lg: 8px 8px 0 var(--border);
}

*, *::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: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.6;
  background-image: radial-gradient(rgba(43, 43, 43, 0.05) 1px, transparent 1px);
  background-size: 28px 28px;
}

::selection { background: var(--primary); color: #fff; }
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg-alt); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 20px; border: 2px solid var(--border); }

/* ===== 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); }

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 249, 239, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--border);
}

.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: 800;
  font-size: 1.3rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.02em;
  transition: transform 0.2s;
}
.logo:hover { transform: scale(1.02); }

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border: 2px solid var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 800;
  color: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s;
}
.logo:hover .logo-icon { transform: rotate(-5deg); }

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

.main-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  position: relative;
  padding: 4px 0;
  transition: color 0.2s;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width 0.3s cubic-bezier(0.65, 0, 0.35, 1);
}
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { width: 100%; }

.nav-cta {
  padding: 9px 22px !important;
  background: var(--primary);
  color: #fff !important;
  border: 2px solid var(--border);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s !important;
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--border);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 2px solid var(--border);
  border-radius: 10px;
  background: var(--card);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s;
}
.menu-toggle:hover { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--border); }

/* ===== 首页 Hero ===== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  background:
    radial-gradient(circle at 85% 15%, rgba(244, 166, 41, 0.18) 0%, transparent 35%),
    radial-gradient(circle at 10% 85%, rgba(27, 122, 119, 0.1) 0%, transparent 30%),
    linear-gradient(rgba(43, 43, 43, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 43, 43, 0.03) 1px, transparent 1px),
    var(--bg);
  background-size: auto, auto, 64px 64px, 64px 64px, auto;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero::before {
  content: '88';
  position: absolute;
  top: 50%;
  right: -30px;
  transform: translateY(-50%);
  font-size: 30rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.08em;
  color: rgba(232, 91, 74, 0.07);
  z-index: 0;
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 40px;
  left: -40px;
  width: 120px;
  height: 120px;
  border: 20px solid rgba(244, 166, 41, 0.25);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 720px;
  animation: heroEnter 0.8s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 6px 16px;
  background: var(--accent);
  border: 2px solid var(--border);
  border-radius: 30px;
  margin-bottom: 20px;
  box-shadow: var(--shadow-sm);
  transform: rotate(-2deg);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.hero h1 {
  font-size: clamp(2.6rem, 5vw, 4rem);
  line-height: 1.1;
  margin-bottom: 20px;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
}

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

.hero p {
  font-size: 1.1rem;
  opacity: 0.8;
  line-height: 1.7;
  max-width: 560px;
  margin-bottom: 32px;
}

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

.hero-image {
  border-radius: 16px;
  overflow: hidden;
  border: 3px solid var(--border);
  box-shadow: var(--shadow-lg);
  transform: rotate(2deg);
  position: relative;
  animation: float 6s ease-in-out infinite;
  background: var(--card);
}

.hero-image::after {
  content: '有声有色 · 发发不息';
  position: absolute;
  bottom: 14px;
  left: 14px;
  background: var(--primary);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 14px;
  border: 2px solid var(--border);
  border-radius: 24px;
  box-shadow: 2px 2px 0 var(--border);
  white-space: nowrap;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  min-height: 300px;
  object-fit: cover;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid var(--border);
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.65, 0, 0.35, 1);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-md);
}
.btn-primary:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--border);
  background: var(--primary-dark);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow-md);
}
.btn-outline:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--border);
  background: var(--card);
}

/* ===== 标签 / 标题 ===== */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 16px;
  text-transform: uppercase;
  padding: 6px 14px;
  background: var(--primary);
  color: #fff;
  border: 2px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
  transform: rotate(-1deg);
}

.section-title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  margin-bottom: 14px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 56px;
  height: 5px;
  background: var(--accent);
  margin-top: 10px;
  border-radius: 4px;
  border: 1.5px solid var(--border);
}

.text-center .section-title::after {
  margin-left: auto;
  margin-right: auto;
}

.section-desc {
  max-width: 600px;
  opacity: 0.75;
  margin-bottom: 40px;
  line-height: 1.7;
}

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

.category-card {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 14px;
  padding: 28px;
  box-shadow: var(--shadow-md);
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.category-card::after {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 30px;
  height: 30px;
  background: var(--accent);
  border-bottom: 2px solid var(--border);
  border-left: 2px solid var(--border);
  border-radius: 0 10px 0 12px;
}

.category-card:hover {
  transform: translate(-3px, -3px) rotate(-0.5deg);
  box-shadow: var(--shadow-lg);
  background: #fff;
}

.card-icon {
  width: 52px;
  height: 52px;
  background: var(--bg-alt);
  border: 2px solid var(--border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.5rem;
  box-shadow: 2px 2px 0 var(--border);
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-block;
  transition: all 0.2s;
}
.card-link:hover {
  color: var(--primary-dark);
  transform: translateX(4px);
}
.card-link::after { content: ' →'; }

/* ===== 特性块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.feature-image {
  border: 3px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transform: rotate(-1deg);
  transition: transform 0.3s;
  background: var(--card);
}
.feature-image:hover {
  transform: rotate(0deg) translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}
.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  min-height: 260px;
  object-fit: cover;
}

.feature-text .section-title { margin-bottom: 20px; }

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 10px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  font-weight: 500;
}

.feature-list li::before {
  content: '✓';
  font-weight: 800;
  color: #fff;
  background: var(--secondary);
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 28px 20px;
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 5px;
  background: var(--accent);
  border-bottom: 2px solid var(--border);
  border-radius: 0 0 8px 8px;
}

.stat-item:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-lg);
}

.stat-number {
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  font-weight: 600;
  letter-spacing: 0.5px;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  background: var(--card);
  border: 2px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.content-wall-item:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-lg);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-bottom: 2px solid var(--border);
  display: block;
  background: var(--bg-alt);
}

.content-wall-body {
  padding: 20px 22px;
}
.content-wall-body h3 {
  font-size: 1.05rem;
  margin-bottom: 6px;
  font-weight: 700;
}
.content-wall-body p {
  font-size: 0.9rem;
  opacity: 0.7;
  line-height: 1.6;
}

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

.faq-item {
  border: 2px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--card);
  transition: all 0.25s;
}
.faq-item:hover {
  box-shadow: var(--shadow-sm);
  transform: translate(-1px, -1px);
}
.faq-item.open {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}

.faq-item .faq-question {
  padding: 18px 20px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.2s;
}
.faq-item.open .faq-question { color: var(--primary); }

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  transition: transform 0.3s;
  line-height: 1;
  flex-shrink: 0;
}
.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-item .faq-answer {
  padding: 0 20px 18px;
  display: none;
  opacity: 0.75;
  line-height: 1.7;
  font-size: 0.95rem;
}
.faq-item.open .faq-answer {
  display: block;
  animation: faqFadeIn 0.3s ease;
}

/* ===== CTA 横幅 ===== */
.cta-banner {
  padding: 56px 24px;
  text-align: center;
  border-radius: 16px;
  color: #fff;
  border: 3px solid var(--border);
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '88';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 18rem;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.08);
  z-index: 0;
  pointer-events: none;
  line-height: 1;
}

.cta-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 12px,
    rgba(255, 255, 255, 0.04) 12px,
    rgba(255, 255, 255, 0.04) 24px
  );
  z-index: 0;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.cta-banner p {
  position: relative;
  z-index: 1;
  opacity: 0.95;
  margin-bottom: 28px;
  font-size: 1.05rem;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--text);
  border: 2px solid var(--border);
  box-shadow: var(--shadow-md);
  position: relative;
  z-index: 1;
}
.cta-banner .btn-primary:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--border);
  background: var(--bg);
}

/* ===== 页脚 ===== */
.site-footer {
  padding: 56px 0 28px;
  background: var(--bg-alt);
  border-top: 2px solid var(--border);
  position: relative;
}

.site-footer h4 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 1px;
  text-transform: uppercase;
}

.site-footer a {
  color: var(--text);
  text-decoration: none;
  font-size: 0.9rem;
  opacity: 0.75;
  transition: all 0.2s;
  line-height: 2;
}

.site-footer a:hover {
  opacity: 1;
  color: var(--primary);
  padding-left: 4px;
}

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

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

.footer-brand p {
  font-size: 0.9rem;
  opacity: 0.7;
  line-height: 1.8;
  max-width: 280px;
}

.footer-bottom {
  border-top: 2px solid var(--border);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.65;
  font-weight: 500;
}

/* ===== 工具类 ===== */
.text-accent {
  color: var(--primary);
  font-weight: 700;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.75;
  line-height: 1.8;
  font-size: 1rem;
}

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

/* ===== 动画 ===== */
@keyframes heroEnter {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: rotate(2deg) translateY(0); }
  50% { transform: rotate(2deg) translateY(-8px); }
}

@keyframes faqFadeIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .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: 0;
    width: 100%;
    background: var(--bg);
    padding: 24px;
    border-bottom: 2px solid var(--border);
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.12);
    gap: 14px;
    align-items: stretch;
  }

  .main-nav.open a {
    padding: 10px 4px;
    border-bottom: 1px solid rgba(43, 43, 43, 0.1);
  }

  .main-nav.open a::after { display: none; }

  .main-nav.open .nav-cta {
    text-align: center;
    margin-top: 8px;
  }

  .hero {
    padding: 100px 0 40px;
    min-height: 80vh;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero::before {
    font-size: 16rem;
    right: -20px;
  }

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

  .hero-image { transform: rotate(0deg); }

  .section { padding: 56px 0; }
}

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

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

  .hero-buttons { flex-direction: column; }

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

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

  .hero::after {
    width: 60px;
    height: 60px;
    border-width: 12px;
  }

  .section-title { font-size: 1.5rem; }

  .stat-item { padding: 20px 16px; }

  .cta-banner {
    padding: 40px 20px;
  }

  .cta-banner::before { font-size: 10rem; }

  .header-inner {
    height: 64px;
    padding: 0 16px;
  }

  .main-nav.open { top: 64px; }

  .container { padding: 0 16px; }
}