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

:root{
  --paper:#FFF8EE;
  --paper-2:#F1EDFF;
  --paper-3:#EAF7FF;
  --ink:#23204A;
  --ink-soft:rgba(35,32,74,.62);
  --line:rgba(35,32,74,.16);
  --coral:#FF5A36;
  --lime:#D9F84C;
  --violet:#6E4BFF;
  --sky:#C4E9FF;
  --hard:6px 6px 0 #23204A;
  --hard-hover:11px 11px 0 #23204A;
}

html{ scroll-behavior:smooth; }

body{
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  color:var(--ink);
  line-height:1.68;
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 6% 2%, rgba(110,75,255,.14), transparent 38%),
    radial-gradient(circle at 94% 14%, rgba(217,248,76,.40), transparent 34%),
    radial-gradient(circle at 50% 96%, rgba(196,233,255,.55), transparent 40%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='0.30'/%3E%3C/svg%3E");
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

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

::-webkit-scrollbar{ width:11px; }
::-webkit-scrollbar-track{ background:var(--paper); }
::-webkit-scrollbar-thumb{ background:var(--ink); border:3px solid var(--paper); border-radius:20px; }
::-webkit-scrollbar-thumb:hover{ background:var(--coral); }

/* ============ 核心布局 ============ */
.container{ max-width:1200px; margin:0 auto; padding:0 24px; }

.section{ padding:88px 0; position:relative; }

.section:nth-child(even){
  background:var(--paper-2);
  border-top:2px solid var(--ink);
  border-bottom:2px solid var(--ink);
}

/* ============ 导航 ============ */
.site-header{
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(255,248,238,.92);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom:2px solid var(--ink);
}

.site-header::before{
  content:"";
  position:absolute; top:0; left:0; width:100%; height:4px;
  background:linear-gradient(90deg,var(--coral) 0%,var(--coral) 25%,var(--lime) 25%,var(--lime) 50%,var(--violet) 50%,var(--violet) 75%,var(--sky) 75%,var(--sky) 100%);
}

.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  height:74px; max-width:1200px; margin:0 auto; padding:0 24px;
}

.logo{
  display:flex; align-items:center; gap:10px;
  font-weight:900; font-size:1.18rem; letter-spacing:-.02em;
  text-decoration:none; color:var(--ink);
}

.logo-icon{
  width:38px; height:38px; border-radius:11px;
  display:flex; align-items:center; justify-content:center;
  font-size:1.05rem;
  background:linear-gradient(135deg,var(--coral),var(--violet));
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-6deg);
  transition:transform .28s cubic-bezier(.2,1.4,.4,1);
}

.logo:hover .logo-icon{ transform:rotate(6deg) scale(1.06); }

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

.main-nav a{
  text-decoration:none; font-size:.9rem; font-weight:700;
  color:var(--ink); letter-spacing:.01em;
  position:relative; padding-bottom:3px;
  transition:color .2s ease;
}

.main-nav a::after{
  content:"";
  position:absolute; left:0; bottom:0;
  width:100%; height:3px;
  background:var(--coral);
  border-radius:3px;
  transform:scaleX(0); transform-origin:left;
  transition:transform .28s cubic-bezier(.2,1,.3,1);
}

.main-nav a:hover::after{ transform:scaleX(1); }
.main-nav a:hover{ color:var(--violet); }

.nav-cta{
  padding:9px 22px; border-radius:11px;
  color:var(--ink)!important;
  font-weight:800;
  background:var(--lime);
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 var(--ink);
  transition:transform .18s ease, box-shadow .18s ease, background .2s ease;
}

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

.nav-cta:hover{
  background:var(--coral);
  color:#fff!important;
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 var(--ink);
}

.menu-toggle{
  display:none; align-items:center; justify-content:center;
  width:40px; height:40px; border-radius:11px;
  background:var(--lime); border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  font-size:1.1rem; cursor:pointer; color:var(--ink);
}

/* ============ Hero ============ */
.hero{
  min-height:70vh;
  display:flex; align-items:center;
  padding:150px 0 96px;
  position:relative; overflow:hidden;
}

.hero::after{
  content:"";
  position:absolute; right:-160px; top:80px;
  width:460px; height:460px; border-radius:50%;
  background:radial-gradient(circle at 35% 35%, rgba(255,90,54,.28), rgba(110,75,255,.14) 60%, transparent 72%);
  pointer-events:none;
  z-index:-1;
}

.hero-content{ max-width:760px; position:relative; z-index:2; }

.hero-eyebrow{
  display:inline-block;
  font-size:.82rem; font-weight:800;
  letter-spacing:.18em; text-transform:uppercase;
  padding:7px 18px; border-radius:999px;
  margin-bottom:26px;
  background:var(--lime);
  color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 var(--ink);
  transform:rotate(-1.5deg);
}

.hero h1{
  font-size:clamp(2.35rem, 6.2vw, 4.35rem);
  line-height:1.03;
  font-weight:900;
  letter-spacing:-.035em;
  margin-bottom:24px;
}

.hero p{
  font-size:1.1rem;
  color:var(--ink-soft);
  max-width:580px;
  margin-bottom:38px;
}

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

.hero-image{
  border-radius:20px; overflow:hidden;
  border:2px solid var(--ink);
  box-shadow:var(--hard);
  background:#fff;
}

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

/* ============ 按钮 ============ */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:9px;
  padding:14px 32px; border-radius:13px;
  font-weight:800; font-size:.95rem; letter-spacing:.01em;
  cursor:pointer; border:2px solid var(--ink);
  text-decoration:none;
  transition:transform .18s cubic-bezier(.2,1,.3,1), box-shadow .18s ease, background .22s ease, color .22s ease;
}

.btn-primary{
  background:var(--coral);
  color:#fff;
  box-shadow:var(--hard);
}

.btn-primary:hover{
  background:var(--violet);
  transform:translate(-3px,-3px);
  box-shadow:var(--hard-hover);
}

.btn-outline{
  background:transparent;
  border:2px solid var(--ink);
  color:var(--ink);
  box-shadow:var(--hard);
}

.btn-outline:hover{
  background:var(--lime);
  transform:translate(-3px,-3px);
  box-shadow:var(--hard-hover);
}

/* ============ 标签 / 标题 ============ */
.section-label{
  display:inline-block;
  font-size:.78rem; font-weight:800;
  letter-spacing:.26em; text-transform:uppercase;
  margin-bottom:16px;
  color:var(--violet);
}

.section-label::before{
  content:"◆";
  color:var(--coral);
  margin-right:9px;
  font-size:.7em;
  vertical-align:2px;
}

.section-title{
  font-size:clamp(1.7rem, 3.4vw, 2.45rem);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.14;
  margin-bottom:16px;
}

.section-desc{
  max-width:620px;
  color:var(--ink-soft);
  margin-bottom:46px;
  font-size:1.02rem;
}

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

.category-card{
  border-radius:18px;
  padding:30px 28px;
  background:#fff;
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(35,32,74,.9);
  transition:transform .22s cubic-bezier(.2,1,.3,1), box-shadow .22s ease, background .22s ease;
  position:relative;
  overflow:hidden;
}

.category-card:hover{
  transform:translate(-4px,-4px);
  box-shadow:var(--hard-hover);
  background:#FFFDF7;
}

.category-card:nth-child(3n+2) .card-icon{ background:var(--lime); }
.category-card:nth-child(3n+3) .card-icon{ background:var(--sky); }

.card-icon{
  width:52px; height:52px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:20px;
  font-size:1.35rem;
  background:var(--sky);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-4deg);
}

.card-link{
  font-weight:800; font-size:.85rem;
  text-decoration:none;
  color:var(--violet);
  letter-spacing:.06em;
  text-transform:uppercase;
  display:inline-flex; align-items:center; gap:6px;
  transition:gap .2s ease, color .2s ease;
}

.card-link:hover{ gap:12px; color:var(--coral); }

/* ============ 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:var(--hard);
  background:#fff;
  transform:rotate(-1.2deg);
}

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

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

.feature-text p{ color:var(--ink-soft); margin-bottom:22px; }

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

.feature-list li{
  padding:9px 0;
  display:flex; align-items:flex-start; gap:12px;
  font-weight:600;
  font-size:.98rem;
}

.feature-list li::before{
  content:'✓';
  font-weight:900;
  flex:0 0 24px;
  width:24px; height:24px;
  display:inline-flex; align-items:center; justify-content:center;
  border-radius:50%;
  background:var(--lime);
  border:2px solid var(--ink);
  font-size:.72rem;
  margin-top:2px;
}

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

.stat-item{
  padding:30px 20px;
  border-radius:18px;
  background:#fff;
  border:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(35,32,74,.9);
  transition:transform .22s cubic-bezier(.2,1,.3,1), box-shadow .22s ease;
}

.stat-item:nth-child(1){ background:#FFF0EA; }
.stat-item:nth-child(2){ background:#F2FDE0; }
.stat-item:nth-child(3){ background:#EFEBFF; }
.stat-item:nth-child(4){ background:#E8F7FF; }

.stat-item:hover{
  transform:translate(-4px,-4px) rotate(-1deg);
  box-shadow:var(--hard-hover);
}

.stat-number{
  font-size:2.4rem;
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1.1;
  color:var(--ink);
}

.stat-label{
  font-size:.88rem;
  color:var(--ink-soft);
  margin-top:8px;
  font-weight:600;
  letter-spacing:.04em;
}

/* ============ 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:2px solid var(--ink);
  box-shadow:4px 4px 0 rgba(35,32,74,.9);
  transition:transform .22s cubic-bezier(.2,1,.3,1), box-shadow .22s ease;
}

.content-wall-item:hover{
  transform:translate(-4px,-4px);
  box-shadow:var(--hard-hover);
}

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

.content-wall-body{ padding:22px; }

.content-wall-body h3{
  font-size:1.08rem;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:10px;
}

.content-wall-body p{
  font-size:.92rem;
  color:var(--ink-soft);
}

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

.faq-item{
  border:2px solid var(--ink);
  border-radius:16px;
  margin-bottom:12px;
  overflow:hidden;
  cursor:pointer;
  background:#fff;
  box-shadow:4px 4px 0 rgba(35,32,74,.9);
  transition:box-shadow .2s ease, transform .2s ease, background .2s ease;
}

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

.faq-item .faq-question{
  padding:18px 24px;
  font-weight:800;
  font-size:1rem;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
  letter-spacing:-.01em;
  transition:background .22s ease;
}

.faq-item .faq-question::after{
  content:"+";
  flex:0 0 28px;
  width:28px; height:28px;
  display:inline-flex; align-items:center; justify-content:center;
  border-radius:50%;
  background:var(--lime);
  border:2px solid var(--ink);
  font-weight:900;
  font-size:1rem;
  line-height:1;
  transition:transform .28s cubic-bezier(.2,1.4,.4,1), background .22s ease;
}

.faq-item .faq-answer{
  padding:0 24px 20px;
  display:none;
  color:var(--ink-soft);
  font-size:.95rem;
  border-top:2px dashed var(--line);
  padding-top:18px;
  margin-top:-2px;
}

.faq-item.open{ background:#FFFCF3; }

.faq-item.open .faq-question{ background:var(--paper-2); }

.faq-item.open .faq-question::after{
  content:"−";
  transform:rotate(180deg);
  background:var(--coral);
  color:#fff;
}

.faq-item.open .faq-answer{ display:block; }

/* ============ CTA 横幅 ============ */
.cta-banner{
  padding:64px 32px;
  text-align:center;
  border-radius:24px;
  color:#fff;
  background:linear-gradient(118deg, var(--coral) 0%, var(--violet) 58%, #3A2BD6 100%);
  border:2px solid var(--ink);
  box-shadow:10px 10px 0 var(--ink);
  position:relative;
  overflow:hidden;
}

.cta-banner::before{
  content:"";
  position:absolute; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)' opacity='0.22'/%3E%3C/svg%3E");
  pointer-events:none;
  opacity:.5;
}

.cta-banner > *{ position:relative; z-index:2; }

.cta-banner h2{
  color:#fff;
  font-size:clamp(1.6rem, 3.6vw, 2.5rem);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.15;
  margin-bottom:16px;
}

.cta-banner p{
  color:rgba(255,255,255,.86);
  max-width:560px;
  margin:0 auto 30px;
}

.cta-banner .btn-primary{
  background:#fff;
  color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:5px 5px 0 var(--ink);
}

.cta-banner .btn-primary:hover{
  background:var(--lime);
  transform:translate(-3px,-3px);
  box-shadow:9px 9px 0 var(--ink);
}

/* ============ 页脚 ============ */
.site-footer{
  padding:68px 0 30px;
  background:var(--paper-3);
  border-top:2px solid var(--ink);
  position:relative;
}

.site-footer::before{
  content:"";
  position:absolute; top:0; left:0; width:100%; height:5px;
  background:linear-gradient(90deg,var(--lime) 0%,var(--lime) 25%,var(--violet) 25%,var(--violet) 50%,var(--sky) 50%,var(--sky) 75%,var(--coral) 75%,var(--coral) 100%);
}

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

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

.footer-brand p{
  font-size:.92rem;
  color:var(--ink-soft);
  max-width:320px;
}

.footer-col h4{
  font-size:.82rem;
  font-weight:900;
  letter-spacing:.18em;
  text-transform:uppercase;
  margin-bottom:18px;
  color:var(--ink);
}

.footer-col ul{ list-style:none; }

.footer-col li{ margin-bottom:10px; }

.footer-col a{
  text-decoration:none;
  color:var(--ink-soft);
  font-size:.93rem;
  font-weight:600;
  transition:color .2s ease, padding-left .2s ease;
}

.footer-col a:hover{
  color:var(--coral);
  padding-left:6px;
}

.footer-bottom{
  border-top:2px solid var(--line);
  margin-top:48px;
  padding-top:22px;
  text-align:center;
  font-size:.85rem;
  color:var(--ink-soft);
  font-weight:500;
}

/* ============ 工具类 ============ */
.text-accent{
  color:var(--coral);
  position:relative;
  white-space:nowrap;
}

.text-accent::after{
  content:"";
  position:absolute;
  left:-2px; right:-2px; bottom:4px;
  height:34%;
  background:var(--lime);
  z-index:-1;
  border-radius:3px;
}

.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-soft);
  font-size:1rem;
}

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

/* ============ 响应式 ============ */
@media (max-width: 900px){
  .feature-block{ gap:40px; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .stats-bar{ grid-template-columns:repeat(2,1fr); }
}

@media (max-width: 768px){
  .section{ padding:66px 0; }

  .hero{ padding:128px 0 72px; min-height:auto; }

  .feature-block{ grid-template-columns:1fr; }
  .stats-bar{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; }

  .main-nav{
    display:none;
    gap:18px;
  }

  .main-nav.open{
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    position:absolute;
    top:76px; left:0;
    width:100%;
    background:var(--paper);
    padding:24px;
    border-bottom:2px solid var(--ink);
    box-shadow:0 10px 0 rgba(35,32,74,.12);
  }

  .main-nav.open a{ font-size:1rem; }
  .main-nav.open .nav-cta{ width:100%; text-align:center; }

  .menu-toggle{ display:flex; }

  .cta-banner{ padding:48px 22px; box-shadow:7px 7px 0 var(--ink); }
}

@media (max-width: 480px){
  .container{ padding:0 18px; }
  .header-inner{ padding:0 18px; height:68px; }

  .cards-grid,
  .content-wall,
  .stats-bar{ grid-template-columns:1fr; }

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

  .hero-buttons{ flex-direction:column; align-items:stretch; }
  .hero-buttons .btn{ width:100%; }

  .hero h1{ letter-spacing:-.02em; }

  .category-card,
  .content-wall-item,
  .stat-item{ box-shadow:3px 3px 0 rgba(35,32,74,.9); }

  .main-nav.open{ top:70px; }
}