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

:root {
  --banana: #FFC900;
  --banana-light: #FFE566;
  --coral: #FF5E4A;
  --teal: #00B894;
  --ink: #2B1A00;
  --cream: #FFF7E8;
  --paper: #FFFFFF;
  --subtle: rgba(43, 26, 0, 0.65);
  --halftone-dot: rgba(255, 201, 0, 0.18);
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--cream);
  color: var(--ink);
  line-height: 1.6;
}

::selection {
  background: var(--banana);
  color: var(--ink);
}

::-webkit-scrollbar { width: 12px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb {
  background: var(--banana);
  border: 3px solid var(--ink);
  border-radius: 8px;
}

:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 2px;
}

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

.section {
  padding: 80px 0;
}

.section:nth-child(even) {
  background-image: radial-gradient(var(--halftone-dot) 2px, transparent 3px);
  background-size: 24px 24px;
  background-color: var(--paper);
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 247, 232, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 3px solid var(--ink);
}

.site-header::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 5px;
  background: repeating-linear-gradient(90deg, var(--banana) 0 15px, var(--coral) 15px 30px, var(--teal) 30px 45px);
}

.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: 900;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.02em;
  transition: transform 0.2s ease;
}

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

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  background: var(--banana);
  border: 3px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-10deg);
  transition: transform 0.3s ease;
}

.logo:hover .logo-icon { transform: rotate(0deg) scale(1.05); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 8px;
  transition: all 0.2s ease;
  position: relative;
}

.main-nav a:hover {
  color: var(--coral);
  background: rgba(255, 201, 0, 0.14);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 14px;
  width: 0;
  height: 3px;
  background: var(--coral);
  border-radius: 2px;
  transition: width 0.25s ease;
}

.main-nav a:hover::after { width: calc(100% - 28px); }

.nav-cta {
  padding: 9px 22px !important;
  border-radius: 10px !important;
  color: #fff !important;
  font-weight: 800 !important;
  background: var(--coral) !important;
  border: 3px solid var(--ink) !important;
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-2deg);
  margin-left: 6px;
}

.nav-cta:hover {
  transform: rotate(0deg) translate(-1px, -1px);
  box-shadow: 4px 4px 0 var(--ink);
  color: #fff !important;
  background: var(--coral) !important;
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 3px solid var(--ink);
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 2px 2px 0 var(--ink);
  padding: 6px;
  transition: transform 0.2s ease;
}

.menu-toggle span {
  width: 20px;
  height: 3px;
  background: var(--ink);
  border-radius: 3px;
  display: block;
}

.menu-toggle:hover { transform: rotate(90deg); }

/* ===== 首页Hero ===== */
.hero {
  min-height: 80vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
  background:
    radial-gradient(circle at 90% 20%, rgba(255, 201, 0, 0.35) 0%, transparent 45%),
    radial-gradient(circle at 70% 80%, rgba(255, 94, 74, 0.1) 0%, transparent 40%),
    var(--cream);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background-image: radial-gradient(rgba(255, 201, 0, 0.22) 3px, transparent 4px);
  background-size: 28px 28px;
  clip-path: polygon(16% 0, 100% 0, 100% 100%, 0% 100%);
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
  width: 100%;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: 30px;
  margin-bottom: 20px;
  background: var(--coral);
  color: #fff;
  border: 3px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-2deg);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(2.5rem, 5.5vw, 4rem);
  line-height: 1.12;
  margin-bottom: 22px;
  font-weight: 900;
  color: var(--ink);
  letter-spacing: -0.02em;
  text-shadow:
    3px 3px 0 var(--banana),
    5px 5px 0 rgba(255, 94, 74, 0.45);
}

.hero p {
  font-size: 1.1rem;
  color: var(--subtle);
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.75;
}

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

.hero-image {
  border-radius: 20px;
  overflow: hidden;
  border: 4px solid var(--ink);
  box-shadow: 8px 8px 0 var(--ink);
  transform: rotate(2deg);
  transition: transform 0.3s ease;
}

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

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
  min-height: 320px;
  object-fit: cover;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 12px;
  font-weight: 800;
  font-size: 0.95rem;
  cursor: pointer;
  border: 3px solid var(--ink);
  text-decoration: none;
  transition: all 0.15s ease;
  letter-spacing: 0.02em;
}

.btn:active {
  transform: translate(3px, 3px) !important;
  box-shadow: 1px 1px 0 var(--ink) !important;
}

.btn-primary {
  background: var(--banana);
  color: var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
  transform: rotate(-1deg);
}

.btn-primary:hover {
  transform: rotate(0deg) translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--coral);
}

.btn-outline {
  background: var(--paper);
  color: var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
}

.btn-outline:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 var(--banana);
}

/* ===== 标签/标题 ===== */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  margin-bottom: 14px;
  background: var(--banana);
  color: var(--ink);
  padding: 6px 16px;
  border-radius: 20px;
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
  transform: rotate(-2deg);
  text-transform: uppercase;
}

.section-title {
  font-size: 2.2rem;
  margin-bottom: 18px;
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.25;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  border-bottom: 4px dashed var(--coral);
  border-radius: 4px;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  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: 30px;
}

.category-card {
  border-radius: 16px;
  padding: 30px;
  border: 3px solid var(--ink);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--ink);
  transition: all 0.2s ease;
  position: relative;
}

.category-card:nth-child(odd) { transform: rotate(-1.5deg); }
.category-card:nth-child(even) { transform: rotate(1.2deg); }
.category-card:nth-child(3n) { background: var(--banana-light); }
.category-card:nth-child(3n+2) { background: #FFE8E2; }

.category-card:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 8px 8px 0 var(--coral);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.35rem;
  border: 3px solid var(--ink);
  background: var(--banana);
  box-shadow: 3px 3px 0 var(--ink);
}

.category-card:nth-child(3n+2) .card-icon { background: var(--coral); color: #fff; }
.category-card:nth-child(3n) .card-icon { background: var(--teal); color: #fff; }
.category-card:nth-child(3n+1) .card-icon { background: var(--banana); }

.card-link {
  font-weight: 800;
  font-size: 0.88rem;
  text-decoration: none;
  color: var(--coral);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}

.card-link:hover { gap: 10px; color: var(--ink); }

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

.feature-image {
  border-radius: 20px;
  overflow: hidden;
  border: 4px solid var(--ink);
  box-shadow: 7px 7px 0 var(--banana);
  transform: rotate(-1.5deg);
  transition: transform 0.3s ease;
}

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

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

.feature-text {}

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

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  background: var(--banana);
  border: 2px solid var(--ink);
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  box-shadow: 2px 2px 0 var(--ink);
  flex-shrink: 0;
  color: var(--ink);
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: 18px;
  border: 3px solid var(--ink);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--ink);
  transition: all 0.2s ease;
}

.stat-item:nth-child(odd) { transform: rotate(-1deg); }
.stat-item:nth-child(even) { transform: rotate(1deg); background: var(--banana-light); }

.stat-item:hover {
  transform: translateY(-3px) rotate(0deg);
  box-shadow: 7px 7px 0 var(--coral);
}

.stat-number {
  font-size: 2.4rem;
  font-weight: 900;
  line-height: 1.2;
  text-shadow: 2px 2px 0 rgba(255, 94, 74, 0.35);
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.65;
  margin-top: 6px;
  font-weight: 600;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 30px;
}

.content-wall-item {
  border-radius: 16px;
  overflow: hidden;
  border: 3px solid var(--ink);
  background: var(--paper);
  box-shadow: 5px 5px 0 var(--ink);
  transition: all 0.2s ease;
}

.content-wall-item:nth-child(even) { transform: rotate(1deg); }
.content-wall-item:nth-child(odd) { transform: rotate(-1deg); }

.content-wall-item:hover {
  transform: translateY(-5px) rotate(0deg);
  box-shadow: 8px 8px 0 var(--teal);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  border-bottom: 3px solid var(--ink);
}

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

.content-wall-body h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
  font-weight: 800;
  line-height: 1.4;
}

.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: 3px solid var(--ink);
  border-radius: 14px;
  margin-bottom: 14px;
  overflow: hidden;
  cursor: pointer;
  background: var(--paper);
  box-shadow: 4px 4px 0 var(--ink);
  transition: all 0.2s ease;
}

.faq-item.open {
  box-shadow: 6px 6px 0 var(--banana);
  transform: translateY(-2px);
}

.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
}

.faq-item .faq-question::before {
  content: 'Q';
  background: var(--banana);
  border: 2px solid var(--ink);
  border-radius: 50%;
  min-width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 900;
  box-shadow: 2px 2px 0 var(--ink);
  flex-shrink: 0;
}

.faq-item .faq-question::after {
  content: '+';
  margin-left: auto;
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--coral);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item.open .faq-question::after {
  content: '−';
  transform: rotate(90deg);
}

.faq-item .faq-answer {
  padding: 0 28px 20px 62px;
  display: none;
  opacity: 0.75;
  line-height: 1.8;
  font-size: 0.95rem;
}

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

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

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 60px 40px;
  text-align: center;
  border-radius: 24px;
  background: linear-gradient(135deg, var(--banana) 0%, var(--coral) 100%);
  border: 4px solid var(--ink);
  box-shadow: 8px 8px 0 var(--ink);
  position: relative;
  overflow: hidden;
  color: var(--ink);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -40px;
  width: 160px;
  height: 160px;
  background-image: radial-gradient(rgba(255, 255, 255, 0.28) 4px, transparent 5px);
  background-size: 22px 22px;
  border-radius: 50%;
  z-index: 0;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -34px;
  left: 8%;
  width: 90px;
  height: 90px;
  background: var(--banana-light);
  clip-path: polygon(50% 0%, 61% 20%, 80% 15%, 75% 35%, 95% 40%, 80% 55%, 95% 70%, 72% 78%, 75% 95%, 55% 85%, 40% 100%, 30% 82%, 10% 90%, 20% 70%, 0% 60%, 20% 45%, 5% 30%, 28% 30%, 20% 10%, 40% 20%);
  border: 3px solid var(--ink);
  transform: rotate(15deg);
  z-index: 0;
}

.cta-banner > * {
  position: relative;
  z-index: 1;
}

.cta-banner h2 {
  color: var(--ink);
  font-size: 2rem;
  font-weight: 900;
  margin-bottom: 14px;
  text-shadow: 3px 3px 0 rgba(255, 255, 255, 0.35);
}

.cta-banner .btn-primary {
  background: var(--paper);
  color: var(--ink);
  border: 3px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  transform: rotate(2deg);
}

.cta-banner .btn-primary:hover {
  transform: rotate(0deg) translate(-2px, -2px);
  box-shadow: 6px 6px 0 var(--ink);
}

/* ===== 页脚 ===== */
.site-footer {
  padding: 64px 0 28px;
  background: var(--paper);
  border-top: 4px solid var(--ink);
}

.site-footer .container {}

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

.footer-brand {}

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

.footer-brand p {
  opacity: 0.65;
  line-height: 1.7;
  font-size: 0.95rem;
  max-width: 280px;
}

.footer-col {}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 14px;
  color: var(--ink);
}

.footer-col a {
  color: var(--subtle);
  text-decoration: none;
  display: block;
  padding: 5px 0;
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

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

.footer-bottom {
  border-top: 2px dashed rgba(43, 26, 0, 0.15);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--subtle);
}

/* ===== 工具类 ===== */
.text-accent {
  color: var(--coral);
  font-weight: 800;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  line-height: 1.7;
}

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

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .header-inner { height: 64px; }

  .hero {
    min-height: auto;
    padding: 100px 0 56px;
  }

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

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

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

  .feature-block {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

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

  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    width: 100%;
    background: var(--paper);
    border-bottom: 3px solid var(--ink);
    padding: 20px 24px;
    gap: 4px;
    box-shadow: 0 8px 0 rgba(43, 26, 0, 0.08);
  }

  .main-nav a {
    padding: 12px 16px;
    font-size: 1rem;
    border-radius: 8px;
  }

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

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

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

  .menu-toggle {
    display: flex;
  }

  .section { padding: 56px 0; }
  .section-title { font-size: 1.7rem; }
  .cta-banner { padding: 40px 24px; border-radius: 16px; }
  .cta-banner h2 { font-size: 1.5rem; }
  .faq-item .faq-answer { padding-left: 22px; }
}

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .hero-eyebrow {
    font-size: 0.75rem;
    padding: 4px 14px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .section-label {
    font-size: 0.7rem;
  }

  .logo { font-size: 1.1rem; }
  .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
  .header-inner { padding: 0 16px; }
  .container { padding: 0 16px; }
}