:root {
  --primary: #FF5A5F;
  --secondary: #2EC4B6;
  --tertiary: #FFD166;
  --accent: #5F27CD;
  --ink: #1A1A2E;
  --bg: #FFFBF2;
  --soft: #FFF1E8;
  --white: #ffffff;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
}
::selection { background: var(--tertiary); color: var(--ink); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; position: relative; }
.section:nth-child(even) { background: var(--soft); }

/* ========== 导航 ========== */
.site-header {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 251, 242, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--ink);
}
.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: -0.01em;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--tertiary);
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--primary);
  transform: rotate(-4deg);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}
.main-nav a {
  position: relative;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  padding: 4px 0;
  transition: color .2s;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .3s ease;
}
.main-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}
.main-nav a:hover { color: var(--primary); }
.nav-cta {
  padding: 9px 22px;
  border-radius: 10px;
  color: #fff !important;
  font-weight: 800;
  background: var(--primary);
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.nav-cta::after { display: none; }
.nav-cta:hover {
  transform: translate(-1px,-1px);
  box-shadow: 3px 3px 0 var(--ink);
  color: #fff !important;
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: var(--tertiary);
  border: 2px solid var(--ink);
  border-radius: 10px;
  box-shadow: 2px 2px 0 var(--ink);
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--ink);
}

/* ========== Hero ========== */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
  padding-top: 68px;
  position: relative;
  background:
    linear-gradient(rgba(26,26,46,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,26,46,0.04) 1px, transparent 1px),
    linear-gradient(135deg, #FFFBF2 0%, #FFF1E8 100%);
  background-size: 48px 48px, 48px 48px, 100% 100%;
}
.hero::before {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255,209,102,0.35), transparent 70%);
  top: 10%;
  right: -120px;
  z-index: 0;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-image:
    radial-gradient(3px 3px at 12% 85%, var(--primary), transparent),
    radial-gradient(2px 2px at 28% 18%, rgba(46,196,182,0.7), transparent),
    radial-gradient(3px 3px at 68% 80%, rgba(255,209,102,0.8), transparent),
    radial-gradient(2px 2px at 85% 25%, rgba(95,39,205,0.5), transparent);
  pointer-events: none;
  z-index: 0;
}
.hero .container {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 60px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
.hero-content {
  flex: 1 1 520px;
  max-width: 720px;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 6px 16px;
  border-radius: 40px;
  margin-bottom: 20px;
  background: var(--tertiary);
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
  transform: rotate(-2deg);
}
.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1.08;
  margin-bottom: 20px;
  font-weight: 900;
  letter-spacing: -0.03em;
}
.hero p {
  font-size: 1.15rem;
  color: rgba(26,26,46,0.72);
  max-width: 560px;
  margin-bottom: 32px;
  line-height: 1.8;
}
.hero-buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-image {
  flex: 1 1 380px;
  max-width: 480px;
  border-radius: 24px;
  overflow: hidden;
  border: 2px solid var(--ink);
  box-shadow: 10px 10px 0 var(--ink);
  background: var(--secondary);
  position: relative;
  z-index: 1;
  animation: float 5s ease-in-out infinite;
  min-height: 380px;
}
.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  min-height: 380px;
}
.hero-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,90,95,0.25), transparent 40%, rgba(46,196,182,0.15));
  z-index: 1;
  pointer-events: none;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 10px;
  font-weight: 800;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
}
.btn-primary:hover {
  transform: translate(-1px,-1px);
  box-shadow: 5px 5px 0 var(--ink);
}
.btn-outline {
  background: #fff;
  border: 2px solid var(--ink);
  color: var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
}
.btn-outline:hover {
  transform: translate(-1px,-1px);
  box-shadow: 5px 5px 0 var(--ink);
}

/* ========== 标签 / 标题 ========== */
.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 6px 16px;
  border-radius: 30px;
  margin-bottom: 14px;
  background: var(--tertiary);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
  transform: rotate(-1deg);
}
.section:nth-child(even) .section-label { background: var(--secondary); }
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 900;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  line-height: 1.2;
}
.section-title::after {
  content: '';
  display: block;
  width: 72px;
  height: 8px;
  background: var(--tertiary);
  border: 1.5px solid var(--ink);
  border-radius: 8px;
  margin-top: 12px;
}
.text-center .section-title::after { margin-left: auto; margin-right: auto; }
.section-desc {
  max-width: 600px;
  color: rgba(26,26,46,0.72);
  margin-bottom: 40px;
  font-size: 1.05rem;
  line-height: 1.7;
}
.text-center .section-desc { margin-left: auto; margin-right: auto; }

/* ========== 卡片网格 ========== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.category-card {
  position: relative;
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 20px;
  padding: 28px;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 20px;
  right: 20px;
  height: 5px;
  background: var(--primary);
  border-radius: 0 0 5px 5px;
}
.category-card:nth-child(1) { background: #FFF4E6; }
.category-card:nth-child(2) { background: #E6FFF9; }
.category-card:nth-child(3) { background: #FFE9E9; }
.category-card:nth-child(4) { background: #F0E6FF; }
.category-card:nth-child(2)::before { background: var(--secondary); }
.category-card:nth-child(3)::before { background: var(--tertiary); }
.category-card:nth-child(4)::before { background: var(--accent); }
.category-card:hover {
  transform: translate(-2px,-2px);
  box-shadow: 7px 7px 0 var(--ink);
}
.card-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--tertiary);
  border: 2px solid var(--ink);
  box-shadow: 2px 2px 0 var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  font-size: 1.5rem;
}
.category-card:nth-child(1) .card-icon { background: var(--tertiary); }
.category-card:nth-child(2) .card-icon { background: var(--secondary); }
.category-card:nth-child(3) .card-icon { background: var(--primary); }
.category-card:nth-child(4) .card-icon { background: var(--accent); }
.card-link {
  font-weight: 800;
  font-size: 0.9rem;
  color: var(--primary);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.card-link::after { content: '→'; transition: transform .2s; }
.category-card:hover .card-link::after { transform: translateX(4px); }

/* ========== 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: 2px solid var(--ink);
  box-shadow: 8px 8px 0 var(--secondary);
}
.feature-image img { width: 100%; display: block; object-fit: cover; }
.feature-text {
  font-size: 1.05rem;
  line-height: 1.7;
}
.feature-text h3 { font-size: 1.4rem; margin-bottom: 16px; }
.feature-list { list-style: none; margin-top: 20px; }
.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}
.feature-list li::before {
  content: '★';
  color: var(--primary);
  font-weight: 700;
  font-size: 1.1rem;
}

/* ========== 数据条 ========== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item {
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 20px;
  padding: 28px 20px;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.stat-item:hover {
  transform: translate(-2px,-2px);
  box-shadow: 6px 6px 0 var(--ink);
}
.stat-number {
  display: block;
  font-size: clamp(2rem, 4vw, 2.6rem);
  font-weight: 900;
  line-height: 1;
}
.stat-label {
  font-size: 0.9rem;
  color: rgba(26,26,46,0.6);
  margin-top: 8px;
  font-weight: 500;
}
.stat-item:nth-child(1) .stat-number { color: var(--primary); }
.stat-item:nth-child(2) .stat-number { color: var(--secondary); }
.stat-item:nth-child(3) .stat-number { color: var(--accent); }
.stat-item:nth-child(4) .stat-number { color: #E8590C; }

/* ========== 内容墙 ========== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.content-wall-item {
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 4px 4px 0 var(--ink);
  transition: transform .2s ease, box-shadow .2s ease;
}
.content-wall-item:hover {
  transform: translate(-2px,-2px);
  box-shadow: 6px 6px 0 var(--ink);
}
.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.content-wall-body { padding: 20px; }
.content-wall-body h3 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.content-wall-body p {
  font-size: 0.9rem;
  color: rgba(26,26,46,0.7);
  line-height: 1.6;
}

/* ========== FAQ ========== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 2px 2px 0 var(--ink);
  transition: box-shadow .2s;
  cursor: pointer;
}
.faq-item.open { box-shadow: 4px 4px 0 var(--ink); }
.faq-item .faq-question {
  padding: 18px 22px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 1rem;
}
.faq-item .faq-question::after {
  content: '+';
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform .3s;
}
.faq-item.open .faq-question::after { transform: rotate(45deg); }
.faq-item .faq-answer {
  padding: 0 22px 20px;
  display: none;
  color: rgba(26,26,46,0.75);
  line-height: 1.7;
  font-size: 0.95rem;
}
.faq-item.open .faq-answer { display: block; }

/* ========== CTA横幅 ========== */
.cta-banner {
  padding: 64px 24px;
  text-align: center;
  border-radius: 24px;
  background: var(--primary);
  color: #fff;
  border: 2px solid var(--ink);
  box-shadow: 8px 8px 0 var(--ink);
  position: relative;
  overflow: hidden;
}
.cta-banner h2 {
  color: #fff;
  font-size: clamp(2rem, 5vw, 2.8rem);
  margin-bottom: 12px;
  font-weight: 900;
  letter-spacing: -0.02em;
}
.cta-banner p {
  color: rgba(255,255,255,0.9);
  max-width: 460px;
  margin: 0 auto 28px;
  line-height: 1.7;
}
.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary) !important;
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
}
.cta-banner .btn-primary:hover {
  transform: translate(-1px,-1px);
  box-shadow: 6px 6px 0 var(--ink);
}
.cta-banner::before {
  content: '★';
  position: absolute;
  font-size: 10rem;
  color: rgba(255,255,255,0.15);
  top: -30px;
  right: 20px;
  line-height: 1;
  pointer-events: none;
}
.cta-banner::after {
  content: '★';
  position: absolute;
  font-size: 5rem;
  color: rgba(255,255,255,0.1);
  bottom: -10px;
  left: 30px;
  line-height: 1;
  pointer-events: none;
}

/* ========== 页脚 ========== */
.site-footer {
  background: #FFE9E9;
  border-top: 2px solid var(--ink);
  padding: 56px 0 28px;
}
.site-footer .container { position: relative; }
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand h3 {
  font-size: 1.4rem;
  font-weight: 900;
  margin-bottom: 10px;
}
.footer-brand p {
  color: rgba(26,26,46,0.7);
  max-width: 280px;
  line-height: 1.7;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 800;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}
.footer-col ul { list-style: none; }
.footer-col li { padding: 4px 0; }
.footer-col a {
  text-decoration: none;
  color: rgba(26,26,46,0.75);
  transition: color .2s, padding-left .2s;
  font-size: 0.95rem;
}
.footer-col a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(26,26,46,0.15);
  margin-top: 40px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(26,26,46,0.6);
}

/* ========== 工具类 ========== */
.text-accent {
  background: linear-gradient(180deg, transparent 55%, rgba(255,209,102,0.75) 55%);
  padding: 0 4px;
  border-radius: 2px;
}
.text-center { text-align: center; }
.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  color: rgba(26,26,46,0.72);
  text-align: center;
  line-height: 1.7;
}
.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }

/* ========== 响应式 ========== */
@media (max-width: 768px) {
  .hero { padding-top: 90px; gap: 28px; }
  .hero .container { gap: 28px; }
  .hero-content { flex: 1 1 100%; max-width: 100%; }
  .hero-image { flex: 1 1 100%; max-width: 100%; min-height: 260px; }
  .hero-image img { min-height: 260px; }
  .hero h1 { font-size: 2.6rem; }
  .feature-block { grid-template-columns: 1fr; gap: 32px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .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: #FFFBF2;
    padding: 20px 24px;
    border-bottom: 2px solid var(--ink);
    box-shadow: 4px 4px 0 rgba(26,26,46,0.15);
    gap: 6px;
  }
  .main-nav.open a {
    padding: 12px 0;
    width: 100%;
    border-bottom: 1px solid rgba(26,26,46,0.08);
  }
  .main-nav.open a:last-child { border-bottom: none; }
  .nav-cta { text-align: center; margin-top: 8px; }
  .section { padding: 64px 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; }
  .hero-buttons .btn { width: 100%; justify-content: center; }
  .hero h1 { font-size: 2.2rem; }
  .section-title::after { margin-top: 10px; }
}