```css
/* ============ 复古印刷风 · 奶油底 · 珊瑚橙×墨绿×芥末黄 ============ */

/* 基础重置 */
*, *::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:#FDF6EC;
  color:#1A2E35;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
::selection { background:#FF5A3C; color:#fff; }
::-webkit-scrollbar { width:10px; }
::-webkit-scrollbar-track { background:#FDF6EC; }
::-webkit-scrollbar-thumb { background:#0E7C7B; border-radius:10px; border:2px solid #FDF6EC; }

/* 核心布局 — 必须居中 */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:90px 0; position:relative; }
.section:nth-child(even) { background:#F0F7F4; }

/* 导航 — 固定顶部 */
.site-header { 
  position:fixed; top:0; left:0; width:100%; z-index:1000; 
  background:rgba(253,246,236,0.92); 
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:2px solid #1A2E35;
}
.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:1.25rem;
  text-decoration:none; color:#1A2E35; letter-spacing:-0.5px;
}
.logo-icon { 
  width:38px; height:38px; border-radius:12px 4px 12px 4px; 
  display:flex; align-items:center; justify-content:center; 
  font-size:1rem; background:#FF5A3C; color:#fff; font-weight:800;
  box-shadow:2px 2px 0 #1A2E35;
}
.main-nav { display:flex; align-items:center; gap:28px; list-style:none; }
.main-nav a { 
  text-decoration:none; font-size:0.9rem; font-weight:700; 
  color:#1A2E35; position:relative; padding:4px 0; transition:0.25s;
}
.main-nav a:hover { color:#FF5A3C; }
.main-nav a::after {
  content:''; position:absolute; bottom:-2px; left:0; width:0; height:3px;
  background:#FF5A3C; border-radius:3px; transition:width 0.3s cubic-bezier(0.6,-0.28,0.735,0.045);
}
.main-nav a:hover::after { width:100%; }
.nav-cta { 
  padding:10px 24px; border-radius:50px; color:#fff!important; font-weight:800;
  background:#FF5A3C; box-shadow:3px 3px 0 #1A2E35;
  letter-spacing:0.5px;
}
.nav-cta::after { display:none; }
.nav-cta:hover { box-shadow:5px 5px 0 #1A2E35; transform:translate(-1px,-1px); color:#fff!important; }
.menu-toggle { 
  display:none; background:none; border:none; font-size:1.6rem; cursor:pointer;
  color:#1A2E35; font-weight:800; line-height:1; padding:4px;
}

/* 首页Hero */
.hero { 
  min-height:80vh; display:flex; align-items:center; 
  position:relative; overflow:hidden; padding-top:72px;
}
.hero::before {
  content:''; position:absolute; top:-100px; right:-60px; width:420px; height:420px;
  background:rgba(245,184,65,0.18); border-radius:50%; z-index:0;
}
.hero::after {
  content:''; position:absolute; bottom:50px; left:-50px; width:180px; height:180px;
  border:4px solid #F5B841; border-radius:50%; z-index:0;
}
.hero-content { position:relative; z-index:1; max-width:680px; }
.hero-eyebrow { 
  display:inline-block; font-size:0.78rem; font-weight:800; letter-spacing:3px; 
  padding:6px 18px; border-radius:50px; margin-bottom:26px; 
  background:#fff; border:2px solid #1A2E35; color:#FF5A3C; 
  text-transform:uppercase; transform:rotate(-2deg);
  box-shadow:2px 2px 0 rgba(26,46,53,0.6);
}
.hero h1 { 
  font-size:3.5rem; line-height:1.12; margin-bottom:24px; font-weight:900;
  letter-spacing:-2px;
}
.hero h1 .accent {
  color:#FF5A3C; 
  text-decoration:underline; 
  text-decoration-thickness:0.07em;
  text-decoration-style:wavy; 
  text-underline-offset:0.14em;
}
.hero p { 
  font-size:1.12rem; color:#1A2E35; max-width:560px; margin-bottom:36px;
  border-left:4px solid #0E7C7B; padding-left:18px; opacity:0.85;
}
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }
.hero-image { 
  border-radius:24px 4px 24px 4px; overflow:hidden; 
  position:relative; z-index:1; border:2px solid #1A2E35;
  box-shadow:10px 10px 0 #F5B841;
  transform:rotate(1.5deg);
}
.hero-image img { width:100%; height:auto; display:block; }

/* 按钮 */
.btn { 
  display:inline-flex; align-items:center; gap:8px; padding:14px 30px; 
  border-radius:50px; font-weight:800; cursor:pointer; border:none; 
  text-decoration:none; transition:0.2s; font-size:0.95rem;
  letter-spacing:0.3px;
}
.btn-primary { color:#fff; background:#FF5A3C; box-shadow:4px 4px 0 #1A2E35; }
.btn-primary:hover { transform:translate(2px,2px); box-shadow:2px 2px 0 #1A2E35; }
.btn-outline { background:transparent; border:2px solid #1A2E35; color:#1A2E35; }
.btn-outline:hover { background:#1A2E35; color:#FDF6EC; }

/* 标签/标题 */
.section-label { 
  display:inline-block; font-size:0.72rem; font-weight:800; letter-spacing:4px; 
  margin-bottom:14px; text-transform:uppercase; color:#0E7C7B;
  background:#fff; border:2px solid #0E7C7B; padding:4px 16px; border-radius:4px;
  transform:rotate(-0.5deg);
}
.section-title { 
  font-size:2.4rem; font-weight:900; margin-bottom:14px; 
  letter-spacing:-1px; color:#1A2E35; line-height:1.2;
}
.section-desc { max-width:600px; color:#1A2E35; margin-bottom:44px; font-size:1rem; opacity:0.75; }

/* 卡片网格 */
.cards-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:30px; }
.category-card { 
  border-radius:18px 2px 18px 2px; padding:32px; 
  border:2px solid #1A2E35; background:#fff;
  box-shadow:6px 6px 0 rgba(26,46,53,0.9);
  transition:0.25s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position:relative;
}
.category-card::before {
  content:''; position:absolute; top:-8px; right:-8px; width:20px; height:20px;
  background:#0E7C7B; border-radius:50%; opacity:0;
  transition:0.3s;
}
.category-card:hover { 
  transform:translate(2px,2px); box-shadow:4px 4px 0 #1A2E35;
  background:#F0F7F4;
}
.category-card:hover::before { opacity:1; right:-4px; top:-4px; }
.card-icon { 
  width:54px; height:54px; border-radius:14px 2px 14px 2px; 
  display:flex; align-items:center; justify-content:center; 
  margin-bottom:18px; font-size:1.4rem; background:#0E7C7B; color:#fff;
  box-shadow:3px 3px 0 rgba(26,46,53,0.6);
}
.category-card h3 { font-size:1.15rem; font-weight:800; margin-bottom:8px; }
.category-card p { font-size:0.88rem; opacity:0.65; margin-bottom:16px; line-height:1.5; }
.card-link { 
  font-weight:800; font-size:0.82rem; text-decoration:none; color:#FF5A3C; 
  display:inline-flex; align-items:center; gap:4px;
  border-bottom:2px solid transparent; transition:0.2s;
}
.card-link:hover { border-bottom-color:#FF5A3C; }

/* 特性块 */
.feature-block { display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; }
.feature-image { 
  border-radius:24px 2px 24px 2px; overflow:hidden; position:relative;
  border:2px solid #1A2E35;
}
.feature-image::after {
  content:''; position:absolute; inset:16px -16px -16px 16px;
  border:2px solid #F5B841; border-radius:24px 2px 24px 2px; z-index:-1;
}
.feature-image img { width:100%; height:auto; display:block; }
.feature-text h3 { font-size:1.9rem; font-weight:900; margin-bottom:14px; letter-spacing:-0.5px; }
.feature-text p { opacity:0.75; margin-bottom:8px; }
.feature-list { list-style:none; margin-top:24px; }
.feature-list li { 
  padding:9px 0; display:flex; align-items:center; gap:10px; 
  font-weight:600; font-size:0.95rem; border-bottom:1px dashed rgba(26,46,53,0.18);
}
.feature-list li::before { 
  content:'✓'; font-weight:900; color:#0E7C7B; 
  background:#fff; border:1.5px solid #0E7C7B;
  width:22px; height:22px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-size:0.7rem; flex-shrink:0;
}

/* 数据条 */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:28px; text-align:center; }
.stat-item { 
  padding:34px 16px; border-radius:2px 18px 2px 18px; 
  border:2px solid #1A2E35; background:#fff;
  transition:0.25s;
}
.stat-item:hover { transform:scale(1.03) rotate(0deg)!important; box-shadow:0 8px 24px rgba(26,46,53,0.1); }
.stat-item:nth-child(1) { transform:rotate(-1.2deg); }
.stat-item:nth-child(2) { transform:rotate(0.8deg); }
.stat-item:nth-child(3) { transform:rotate(-0.6deg); background:#F0F7F4; border-color:#0E7C7B; }
.stat-item:nth-child(4) { transform:rotate(1.2deg); }
.stat-number { 
  font-size:2.6rem; font-weight:900; color:#FF5A3C; letter-spacing:-2px; 
  font-variant-numeric:tabular-nums; line-height:1;
}
.stat-label { font-size:0.78rem; font-weight:700; margin-top:8px; text-transform:uppercase; letter-spacing:2px; color:#1A2E35; opacity:0.7; }

/* 内容墙 */
.content-wall { display:grid; grid-template-columns:repeat(auto-fill,minmax(280px,1fr)); gap:30px; }
.content-wall-item { 
  border-radius:2px 18px 2px 18px; overflow:hidden; 
  border:2px solid #1A2E35; background:#fff;
  transition:0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}
.content-wall-item:hover { 
  transform:translateY(-5px); box-shadow:8px 8px 0 #F5B841;
}
.content-wall-item img { width:100%; height:200px; object-fit:cover; display:block; border-bottom:2px solid #1A2E35; }
.content-wall-body { padding:22px; }
.content-wall-body h4 { font-weight:800; font-size:1rem; margin-bottom:6px; color:#1A2E35; }
.content-wall-body p { font-size:0.85rem; opacity:0.65; line-height:1.5; }
.content-wall-body .tag {
  display:inline-block; background:#F5B841; color:#1A2E35; font-size:0.7rem;
  font-weight:800; padding:2px 10px; border-radius:20px; margin-top:10px;
  letter-spacing:0.5px;
}

/* FAQ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item { 
  border:2px solid #1A2E35; border-radius:2px 14px 2px 14px; 
  margin-bottom:12px; overflow:hidden; cursor:pointer; background:#fff;
  transition:0.25s;
}
.faq-item:hover { box-shadow:5px 5px 0 rgba(26,46,53,0.7); }
.faq-item .faq-question { 
  padding:18px 22px; font-weight:800; display:flex; justify-content:space-between; 
  align-items:center; font-size:0.95rem; color:#1A2E35; gap:16px;
}
.faq-item .faq-question::after {
  content:'+'; font-size:1.6rem; color:#FF5A3C; font-weight:900; transition:transform 0.3s; flex-shrink:0;
}
.faq-item.open .faq-question::after { transform:rotate(45deg); }
.faq-item .faq-answer { padding:0 22px 20px; display:none; color:#1A2E35; font-size:0.9rem; opacity:0.75; line-height:1.6; }
.faq-item.open .faq-answer { display:block; }

/* CTA横幅 */
.cta-banner { 
  padding:64px 40px; text-align:center; border-radius:2px 28px 2px 28px; 
  color:#fff; background-color:#FF5A3C;
  box-shadow:10px 10px 0 #0E7C7B;
  position:relative; overflow:hidden;
}
.cta-banner::before {
  content:''; position:absolute; top:-40px; right:-40px; width:180px; height:180px;
  background:rgba(255,255,255,0.08); border-radius:50%;
}
.cta-banner::after {
  content:''; position:absolute; bottom:-60px; left:-30px; width:120px; height:120px;
  background:rgba(255,255,255,0.05); transform:rotate(20deg);
}
.cta-banner h2 { color:#fff; font-size:2rem; font-weight:900; margin-bottom:12px; position:relative; z-index:1; }
.cta-banner p { opacity:0.92; margin-bottom:24px; position:relative; z-index:1; font-size:1rem; }
.cta-banner .btn-primary { background:#fff; color:#FF5A3C; box-shadow:4px 4px 0 #1A2E35; position:relative; z-index:1; }
.cta-banner .btn-primary:hover { box-shadow:2px 2px 0 #1A2E35; transform:translate(2px,2px); }

/* 页脚 */
.site-footer { 
  padding:64px 0 28px; 
  background:#F0F7F4; 
  border-top:3px solid #1A2E35;
  position:relative;
}
.site-footer::before {
  content:''; position:absolute; top:-14px; left:50%; transform:translateX(-50%) rotate(45deg);
  width:24px; height:24px; background:#FF5A3C; border:2px solid #1A2E35;
}
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand h4 { font-size:1.3rem; font-weight:900; margin-bottom:8px; color:#1A2E35; letter-spacing:-0.5px; }
.footer-brand p { font-size:0.85rem; opacity:0.65; max-width:260px; line-height:1.6; }
.footer-brand .logo-icon { margin-bottom:12px; }
.footer-col h5 { 
  font-size:0.72rem; font-weight:800; letter-spacing:2.5px; text-transform:uppercase; 
  margin-bottom:16px; color:#FF5A3C;
  border-bottom:2px solid rgba(26,46,53,0.12); padding-bottom:8px;
}
.footer-col ul { list-style:none; }
.footer-col li { padding:3px 0; }
.footer-col a { 
  text-decoration:none; color:#1A2E35; font-size:0.88rem; opacity:0.7; 
  display:inline-block; padding:3px 0; transition:0.2s;
  border-bottom:1px solid transparent;
}
.footer-col a:hover { opacity:1; color:#FF5A3C; border-bottom-color:#FF5A3C; }
.footer-bottom { border-top:2px solid rgba(26,46,53,0.1); margin-top:48px; padding-top:20px; text-align:center; font-size:0.8rem; color:#1A2E35; opacity:0.6; letter-spacing:0.5px; }

/* 工具类 */
.text-accent { color:#FF5A3C; }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; color:#1A2E35; font-size:1rem; opacity:0.72; line-height:1.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap:48px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); gap:20px; }
  .footer-grid { grid-template-columns:1fr 1fr; gap:32px; }
  .main-nav { 
    display:none; 
    position:absolute; top:72px; left:0; width:100%; 
    background:#FDF6EC; padding:24px; gap:0;
    flex-direction:column; align-items:flex-start;
    border-bottom:2px solid #1A2E35;
    box-shadow:0 12px 24px rgba(26,46,53,0.1);
  }
  .main-nav li { width:100%; }
  .main-nav li a { display:block; padding:12px 0; font-size:1rem; border-bottom:1px dashed rgba(26,46,53,0.1); }
  .main-nav li:last-child a { border-bottom:none; }
  .main-nav.open { display:flex; }
  .menu-toggle { display:block; }
  .hero { min-height:auto; padding-top:110px; padding-bottom:60px; }
  .hero h1 { font-size:2.4rem; letter-spacing:-1px; }
  .hero p { font-size:1rem; }
  .hero::before { width:280px; height:280px; }
  .section-title { font-size:2rem; }
  .cta-banner { padding:48px 24px; }
  .cta-banner h2 { font-size:1.6rem; }
  .stat-item:nth-child(1), .stat-item:nth-child(2), 
  .stat-item:nth-child(3), .stat-item:nth-child(4) { transform:none; }
}
@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 h1 { font-size:1.85rem; }
  .section { padding:56px 0; }
  .hero { padding-top:100px; }
  .stat-number { font-size:2.2rem; }
  .cta-banner h2 { font-size:1.4rem; }
}