:root{
  --paper:#FDF8F0;
  --paper-2:#F4ECE0;
  --ink:#16233D;
  --ink-60:rgba(22,35,61,0.64);
  --ink-14:rgba(22,35,61,0.14);
  --coral:#FF4B23;
  --violet:#5B3DF5;
  --lime:#DFFF57;
  --sky:#CFE3FF;
  --rose:#FFD9CF;
  --shadow-hard:4px 4px 0 var(--ink);
}

/* ============ 基础重置 ============ */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

html{
  scroll-behavior:smooth;
  scroll-padding-top:96px;
  -webkit-text-size-adjust:100%;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  background-color:var(--paper);
  background-image:
    linear-gradient(rgba(22,35,61,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22,35,61,0.045) 1px, transparent 1px);
  background-size:56px 56px;
  background-attachment:fixed;
  color:var(--ink);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

img{ max-width:100%; display:block; }
::selection{ background:var(--lime); color:var(--ink); }

/* ============ 核心布局 ============ */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }
.section { padding:clamp(60px,8vw,104px) 0; position:relative; }
.section:nth-child(even) { background:var(--paper-2); }
.section:nth-child(even)::before{
  content:'';
  position:absolute; inset:0;
  background-image:
    linear-gradient(rgba(22,35,61,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22,35,61,0.035) 1px, transparent 1px);
  background-size:56px 56px;
  pointer-events:none;
}
.section > .container{ position:relative; z-index:1; }

/* ============ 导航 ============ */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(253,248,240,0.86);
  backdrop-filter:blur(16px) saturate(160%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  border-bottom:1.5px solid var(--ink);
}

.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:1.22rem; letter-spacing:-0.02em;
  text-decoration:none; color:var(--ink); white-space:nowrap;
}

.logo-icon {
  width:38px; height:38px; border-radius:11px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem; font-weight:900; color:#fff; flex-shrink:0;
  background:linear-gradient(135deg, #FF4B23 0%, #5B3DF5 100%);
  box-shadow:3px 3px 0 var(--ink);
  border:1.5px solid var(--ink);
}

.main-nav { display:flex; align-items:center; gap:26px; list-style:none; }

.main-nav a {
  position:relative; text-decoration:none;
  font-size:0.9rem; font-weight:600; color:var(--ink);
  padding:4px 0; transition:color .22s ease;
}
.main-nav a::after{
  content:''; position:absolute; left:0; bottom:0;
  width:100%; height:2px; background:var(--coral);
  transform:scaleX(0); transform-origin:left;
  transition:transform .3s cubic-bezier(.4,0,.2,1);
}
.main-nav a:hover{ color:var(--coral); }
.main-nav a:hover::after{ transform:scaleX(1); }

.nav-cta {
  padding:10px 22px !important;
  border-radius:999px;
  color:#fff !important;
  font-weight:800 !important;
  background:var(--coral);
  border:1.5px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .2s ease, box-shadow .2s ease;
}
.nav-cta::after{ display:none !important; }
.nav-cta:hover{
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 var(--ink);
  color:#fff !important;
}

.menu-toggle {
  display:none;
  align-items:center; justify-content:center;
  width:44px; height:40px;
  background:var(--ink); color:var(--paper);
  border:none; border-radius:11px;
  font-size:1.1rem; line-height:1; cursor:pointer;
  transition:transform .2s ease;
}
.menu-toggle:active{ transform:scale(.94); }

/* ============ 首页 Hero ============ */
.hero {
  position:relative;
  min-height:76vh;
  display:flex; align-items:center;
  padding:158px 0 96px;
  overflow:hidden;
}
.hero::before{
  content:''; position:absolute;
  right:-140px; top:-90px;
  width:600px; height:600px; border-radius:50%;
  background:radial-gradient(circle at 38% 38%, #FFD9CF 0%, #FFECE6 44%, rgba(255,236,230,0) 72%);
  pointer-events:none;
}
.hero::after{
  content:''; position:absolute;
  right:74px; bottom:52px;
  width:184px; height:184px; border-radius:32px;
  background:linear-gradient(135deg, var(--violet), var(--sky));
  transform:rotate(14deg); opacity:.2;
  pointer-events:none;
}

.hero-content { max-width:720px; position:relative; z-index:2; }

.hero-eyebrow {
  display:inline-block;
  font-size:0.78rem; font-weight:800; letter-spacing:.14em;
  padding:7px 16px; border-radius:999px; margin-bottom:24px;
  background:var(--lime); color:var(--ink);
  border:1.5px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
}

.hero h1 {
  font-size:clamp(2.3rem, 6.2vw, 4.4rem);
  line-height:1.04; font-weight:900; letter-spacing:-0.035em;
  margin-bottom:24px; color:var(--ink);
}

.hero p {
  font-size:1.08rem; line-height:1.78;
  color:var(--ink-60); max-width:560px; margin-bottom:36px;
}

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

.hero-image {
  border-radius:18px; overflow:hidden;
  border:1.5px solid var(--ink);
  box-shadow:8px 8px 0 var(--ink);
  background:#fff;
}
.hero-image img { width:100%; height:auto; }

/* ============ 按钮 ============ */
.btn {
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:14px 30px; border-radius:13px;
  font-family:inherit; font-size:0.95rem; font-weight:800;
  cursor:pointer; border:1.5px solid transparent; text-decoration:none;
  transition:transform .2s cubic-bezier(.4,0,.2,1), box-shadow .2s ease, background .2s ease;
}

.btn-primary {
  background:var(--coral); color:#fff;
  border-color:var(--ink); box-shadow:5px 5px 0 var(--ink);
}
.btn-primary:hover {
  transform:translate(3px,3px);
  box-shadow:2px 2px 0 var(--ink);
}

.btn-outline {
  background:#fff; color:var(--ink);
  border:1.5px solid var(--ink);
  box-shadow:5px 5px 0 rgba(22,35,61,.16);
}
.btn-outline:hover {
  transform:translate(3px,3px);
  box-shadow:2px 2px 0 rgba(22,35,61,.16);
  background:var(--lime);
}

/* ============ 标签 / 标题 ============ */
.section-label {
  display:inline-block;
  font-size:0.74rem; font-weight:800;
  letter-spacing:.24em; text-transform:uppercase;
  margin-bottom:14px; color:var(--coral);
}
.section-label::before{
  content:''; display:inline-block;
  width:22px; height:2px; background:var(--coral);
  vertical-align:middle; margin-right:10px;
}

.section-title {
  font-size:clamp(1.7rem, 3.6vw, 2.6rem);
  font-weight:900; letter-spacing:-0.03em;
  line-height:1.15; margin-bottom:16px; color:var(--ink);
}

.section-desc {
  max-width:600px; color:var(--ink-60);
  font-size:1.02rem; line-height:1.78; margin-bottom:44px;
}

/* ============ 卡片网格 ============ */
.cards-grid {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(260px,1fr));
  gap:26px;
}

.category-card {
  position:relative; border-radius:18px; padding:30px 28px;
  background:#fff; border:1.5px solid var(--ink);
  box-shadow:var(--shadow-hard);
  transition:transform .25s cubic-bezier(.4,0,.2,1), box-shadow .25s ease;
}
.category-card:hover {
  transform:translate(-3px,-3px);
  box-shadow:8px 8px 0 var(--ink);
}

.card-icon {
  width:50px; height:50px; border-radius:15px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.35rem;
  border:1.5px solid var(--ink);
}
.category-card:nth-child(4n+1) .card-icon{ background:var(--lime); }
.category-card:nth-child(4n+2) .card-icon{ background:var(--rose); }
.category-card:nth-child(4n+3) .card-icon{ background:var(--sky); }
.category-card:nth-child(4n+4) .card-icon{ background:#EDE3FF; }

.category-card h3 {
  font-size:1.12rem; font-weight:800;
  letter-spacing:-0.01em; margin-bottom:10px;
}
.category-card p {
  font-size:0.92rem; line-height:1.72;
  color:var(--ink-60); margin-bottom:18px;
}

.card-link {
  display:inline-flex; align-items:center; gap:6px;
  font-weight:800; font-size:0.85rem;
  color:var(--ink); text-decoration:none;
  padding-bottom:2px; border-bottom:2px solid var(--lime);
  transition:gap .22s ease, border-color .22s ease, color .22s ease;
}
.card-link::after{ content:'→'; }
.card-link:hover{ gap:12px; border-color:var(--coral); color:var(--coral); }

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

.feature-image {
  border-radius:20px; overflow:hidden;
  border:1.5px solid var(--ink);
  box-shadow:8px 8px 0 rgba(91,61,245,.30);
  background:#fff;
}
.feature-image img { width:100%; height:auto; }

.feature-text .section-title{ margin-bottom:18px; }
.feature-text p{ color:var(--ink-60); line-height:1.8; }

.feature-list { list-style:none; margin-top:24px; }
.feature-list li {
  padding:11px 0; display:flex; align-items:flex-start; gap:10px;
  font-size:0.98rem; color:var(--ink);
  border-bottom:1px dashed var(--ink-14);
}
.feature-list li:last-child{ border-bottom:none; }
.feature-list li::before {
  content:'✓'; font-weight:900; color:var(--coral);
  flex-shrink:0; font-size:1rem; line-height:1.7;
}

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

.stat-item {
  padding:32px 20px; border-radius:18px;
  border:1.5px solid var(--ink);
  box-shadow:var(--shadow-hard);
  transition:transform .25s cubic-bezier(.4,0,.2,1), box-shadow .25s ease;
}
.stat-item:nth-child(1){ background:var(--lime); }
.stat-item:nth-child(2){ background:var(--rose); }
.stat-item:nth-child(3){ background:var(--sky); }
.stat-item:nth-child(4){ background:#EDE3FF; }
.stat-item:hover {
  transform:translate(-3px,-3px);
  box-shadow:8px 8px 0 var(--ink);
}

.stat-number {
  font-size:clamp(1.9rem, 3.6vw, 2.7rem);
  font-weight:900; letter-spacing:-0.04em; line-height:1.1;
}
.stat-label {
  font-size:0.86rem; font-weight:700;
  color:rgba(22,35,61,.7); margin-top:8px; letter-spacing:.02em;
}

/* ============ 内容墙 ============ */
.content-wall {
  display:grid; grid-template-columns:repeat(auto-fill, minmax(280px,1fr));
  gap:26px;
}

.content-wall-item {
  border-radius:18px; overflow:hidden; background:#fff;
  border:1.5px solid var(--ink);
  box-shadow:var(--shadow-hard);
  transition:transform .25s cubic-bezier(.4,0,.2,1), box-shadow .25s ease;
}
.content-wall-item:hover {
  transform:translate(-3px,-3px);
  box-shadow:8px 8px 0 var(--ink);
}

.content-wall-item img {
  width:100%; height:200px; object-fit:cover;
  border-bottom:1.5px solid var(--ink);
  transition:transform .6s cubic-bezier(.2,.8,.2,1);
}
.content-wall-item:hover img{ transform:scale(1.05); }

.content-wall-body { padding:22px; }
.content-wall-body h3 {
  font-size:1.05rem; font-weight:800;
  letter-spacing:-0.01em; margin-bottom:8px;
}
.content-wall-body p {
  font-size:0.9rem; line-height:1.72; color:var(--ink-60);
}

/* ============ FAQ ============ */
.faq-list { max-width:820px; margin:0 auto; }

.faq-item {
  background:#fff; border:1.5px solid var(--ink);
  border-radius:15px; margin-bottom:12px; overflow:hidden;
  cursor:pointer;
  transition:box-shadow .22s ease, background .22s ease;
}
.faq-item:hover{ box-shadow:4px 4px 0 var(--ink); }

.faq-item .faq-question {
  padding:20px 24px; font-weight:800; font-size:1rem;
  display:flex; justify-content:space-between; align-items:center;
  gap:16px; transition:background .25s ease;
}
.faq-item .faq-question::after {
  content:'+'; font-size:1.4rem; font-weight:900;
  color:var(--coral); line-height:1;
  transition:transform .3s ease, color .3s ease;
}

.faq-item.open {
  box-shadow:5px 5px 0 var(--ink);
  background:#FFFFFC;
}
.faq-item.open .faq-question {
  background:var(--lime);
  border-bottom:1.5px solid var(--ink);
}
.faq-item.open .faq-question::after {
  content:'−'; transform:rotate(180deg); color:var(--ink);
}

.faq-item .faq-answer {
  padding:18px 24px 22px; display:none;
  color:var(--ink-60); line-height:1.8; font-size:0.94rem;
}
.faq-item.open .faq-answer { display:block; }

/* ============ CTA 横幅 ============ */
.cta-banner {
  position:relative; overflow:hidden;
  padding:66px 32px; text-align:center;
  border-radius:26px; color:#fff;
  background:linear-gradient(120deg, #FF4B23 0%, #FF6A3D 38%, #5B3DF5 100%);
  border:1.5px solid var(--ink);
  box-shadow:10px 10px 0 var(--ink);
}
.cta-banner::before {
  content:''; position:absolute; inset:0;
  background-image:radial-gradient(rgba(255,255,255,.3) 1.5px, transparent 1.5px);
  background-size:22px 22px; opacity:.5;
  pointer-events:none;
}
.cta-banner h2 {
  position:relative; color:#fff;
  font-size:clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight:900; letter-spacing:-0.03em; margin-bottom:14px;
}
.cta-banner p {
  position:relative; color:rgba(255,255,255,.9);
  max-width:560px; margin:0 auto 30px; line-height:1.75;
}
.cta-banner .btn-primary {
  position:relative;
  background:#fff; color:var(--ink); border-color:var(--ink);
  box-shadow:5px 5px 0 rgba(22,35,61,.55);
}
.cta-banner .btn-primary:hover {
  transform:translate(3px,3px);
  box-shadow:2px 2px 0 rgba(22,35,61,.55);
}

/* ============ 页脚 ============ */
.site-footer {
  padding:64px 0 28px;
  background:var(--paper-2);
  border-top:1.5px solid var(--ink);
}

.footer-grid {
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:44px;
}

.footer-brand .logo{ margin-bottom:16px; }
.footer-brand p{
  font-size:0.9rem; line-height:1.78;
  color:var(--ink-60); max-width:290px;
}

.footer-col h4 {
  font-size:0.95rem; font-weight:900;
  letter-spacing:.02em; margin-bottom:16px;
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:10px; }
.footer-col a {
  text-decoration:none; color:var(--ink-60);
  font-size:0.88rem;
  transition:color .2s ease, padding-left .2s ease;
}
.footer-col a:hover{ color:var(--coral); padding-left:6px; }

.footer-bottom {
  border-top:1.5px dashed rgba(22,35,61,.22);
  margin-top:44px; padding-top:22px; text-align:center;
  font-size:0.82rem; color:var(--ink-60);
}

/* ============ 工具类 ============ */
.text-accent {
  background:linear-gradient(180deg, transparent 62%, rgba(223,255,87,.98) 62%);
  padding:0 3px; border-radius:2px;
}
.text-center { text-align:center; }
.text-center .section-desc{ margin-left:auto; margin-right:auto; }

.seo-description {
  max-width:640px; margin:0 auto 48px;
  color:var(--ink-60); line-height:1.82; text-align:center;
}

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

/* ============ 响应式 ============ */
@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap:36px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:34px; }

  .main-nav { display:none; }
  .menu-toggle { display:flex; }

  .main-nav.open {
    display:flex; flex-direction:column; align-items:flex-start;
    position:absolute; top:72px; left:0; width:100%;
    background:var(--paper); padding:24px;
    gap:18px;
    border-bottom:1.5px solid var(--ink);
    box-shadow:0 14px 26px rgba(22,35,61,.09);
  }
  .main-nav.open a{ font-size:1rem; }
  .nav-cta{ width:100%; justify-content:center; text-align:center; }

  .hero { padding:132px 0 76px; min-height:auto; }
  .hero::before,
  .hero::after { display:none; }

  .cta-banner { padding:48px 22px; border-radius:20px; box-shadow:6px 6px 0 var(--ink); }
  .content-wall-item img{ height:180px; }
}

@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%; }

  .section-title { font-size:1.55rem; }
  .container { padding:0 18px; }
  .header-inner { padding:0 18px; }
  .category-card,
  .stat-item { padding:24px 20px; }
  .faq-item .faq-question { padding:16px 18px; font-size:0.95rem; }
  .faq-item .faq-answer { padding:0 18px 18px; }
}