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

:root{
  --paper:#FFFBF2;
  --paper-2:#F5F1E6;
  --paper-3:#F1EEE6;
  --card:#FFFFFF;
  --ink:#181410;
  --ink-soft:#5D5548;
  --line:#E2DACB;
  --vermilion:#FF3B12;
  --teal:#009E8C;
  --sun:#FFC93C;
  --violet:#5B3DF5;
}

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body{
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  background-color: var(--paper);
  color: var(--ink);
  font-size:16px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{ max-width:100%; display:block; }

::selection{ background:var(--vermilion); color:#fff; }

a:focus-visible,
button:focus-visible{
  outline:3px solid var(--violet);
  outline-offset:3px;
  border-radius:6px;
}

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

.section{ padding:96px 0; position:relative; }

.section:nth-child(even){ background:var(--paper-2); }

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0; left:0;
  width:100%;
  z-index:1000;
  background:rgba(255,251,242,0.92);
  backdrop-filter:blur(14px) saturate(160%);
  -webkit-backdrop-filter:blur(14px) saturate(160%);
  border-bottom:2px solid var(--ink);
}

.site-header::after{
  content:'';
  position:absolute;
  left:0; bottom:-2px;
  height:2px; width:36%;
  background:var(--vermilion);
}

.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:800;
  font-size:1.15rem;
  letter-spacing:-0.02em;
  text-decoration:none;
  color:inherit;
  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;
  background:var(--ink);
  color:var(--sun);
  transform:rotate(-6deg);
  box-shadow:3px 3px 0 var(--vermilion);
  transition:transform .35s cubic-bezier(.34,1.56,.64,1), box-shadow .35s ease;
}

.logo:hover .logo-icon{
  transform:rotate(6deg) scale(1.07);
  box-shadow:3px 3px 0 var(--teal);
}

.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 .2s ease;
}

.main-nav a::after{
  content:'';
  position:absolute;
  left:0; bottom:0;
  width:0; height:2px;
  background:var(--vermilion);
  transition:width .28s cubic-bezier(.4,0,.2,1);
}

.main-nav a:hover{ color:var(--vermilion); }
.main-nav a:hover::after{ width:100%; }

.nav-cta{
  padding:9px 22px;
  border-radius:999px;
  color:#fff !important;
  font-weight:700;
  background:var(--vermilion);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease;
}

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

.nav-cta:hover{
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 var(--ink);
  background:var(--vermilion) !important;
  color:#fff !important;
}

.menu-toggle{
  display:none;
  align-items:center;
  justify-content:center;
  width:42px; height:42px;
  border-radius:12px;
  border:2px solid var(--ink);
  background:var(--card);
  color:var(--ink);
  font-size:1.05rem;
  cursor:pointer;
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .18s ease, box-shadow .18s ease;
}

.menu-toggle:active{
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 var(--ink);
}

/* ============ Hero ============ */
.hero{
  min-height:82vh;
  display:flex;
  align-items:center;
  position:relative;
  overflow:hidden;
  padding:150px 0 96px;
}

.hero::before{
  content:'';
  position:absolute;
  top:-160px; right:-150px;
  width:580px; height:580px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(255,59,18,.20), rgba(255,59,18,0) 68%);
  pointer-events:none;
}

.hero::after{
  content:'';
  position:absolute;
  bottom:-190px; left:-140px;
  width:520px; height:520px;
  border-radius:50%;
  background:radial-gradient(circle, rgba(0,158,140,.18), rgba(0,158,140,0) 68%);
  pointer-events:none;
}

.hero .container{
  display:grid;
  grid-template-columns:1.15fr .95fr;
  gap:56px;
  align-items:center;
  position:relative;
  z-index:2;
}

.hero-content{
  max-width:720px;
  position:relative;
  z-index:3;
}

.hero-content:only-child{
  grid-column:1 / -1;
  max-width:840px;
}

.hero-eyebrow{
  display:inline-block;
  font-size:0.76rem;
  font-weight:800;
  letter-spacing:3px;
  padding:7px 18px;
  border-radius:999px;
  margin-bottom:24px;
  background:var(--sun);
  color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  animation:rise .8s cubic-bezier(.2,.8,.2,1) backwards;
}

.hero h1{
  font-size:clamp(2.4rem, 5.6vw, 4.3rem);
  line-height:1.08;
  margin-bottom:24px;
  font-weight:900;
  letter-spacing:-0.038em;
  animation:rise .85s cubic-bezier(.2,.8,.2,1) .08s backwards;
}

.hero p{
  font-size:1.08rem;
  color:var(--ink-soft);
  max-width:560px;
  margin-bottom:36px;
  line-height:1.85;
  animation:rise .85s cubic-bezier(.2,.8,.2,1) .16s backwards;
}

.hero-buttons{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  animation:rise .85s cubic-bezier(.2,.8,.2,1) .24s backwards;
}

.hero-image{
  position:relative;
  z-index:2;
  border-radius:20px;
  overflow:hidden;
  border:2px solid var(--ink);
  box-shadow:12px 12px 0 var(--sun);
  background:var(--card);
}

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

@keyframes rise{
  from{ opacity:0; transform:translateY(26px); }
  to{ opacity:1; transform:translateY(0); }
}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 30px;
  border-radius:999px;
  font-size:0.95rem;
  font-weight:700;
  letter-spacing:0.01em;
  cursor:pointer;
  border:2px solid var(--ink);
  text-decoration:none;
  box-shadow:4px 4px 0 var(--ink);
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}

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

.btn:active{
  transform:translate(4px,4px);
  box-shadow:none;
}

.btn-primary{
  color:#fff;
  background:var(--vermilion);
}

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

.btn-outline:hover{
  background:var(--ink);
  color:var(--paper);
}

/* ============ 标签 / 标题 ============ */
.section-label{
  display:inline-block;
  font-size:0.75rem;
  font-weight:900;
  letter-spacing:3.5px;
  text-transform:uppercase;
  margin-bottom:14px;
  color:var(--vermilion);
}

.section-title{
  font-size:clamp(1.8rem, 3.4vw, 2.6rem);
  margin-bottom:16px;
  font-weight:900;
  letter-spacing:-0.032em;
  line-height:1.22;
}

.section-desc{
  max-width:620px;
  color:var(--ink-soft);
  margin-bottom:46px;
  font-size:1.02rem;
  line-height:1.9;
}

.text-center .section-desc,
.text-center .seo-description{
  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{
  border-radius:16px;
  padding:30px;
  border:2px solid var(--ink);
  background:var(--card);
  position:relative;
  overflow:hidden;
  box-shadow:5px 5px 0 rgba(24,20,16,.09);
  transition:transform .28s cubic-bezier(.34,1.2,.64,1), box-shadow .28s cubic-bezier(.34,1.2,.64,1);
}

.category-card:hover{
  transform:translate(-4px,-4px);
  box-shadow:9px 9px 0 var(--vermilion);
}

.category-card:nth-child(4n+2):hover{ box-shadow:9px 9px 0 var(--teal); }
.category-card:nth-child(4n+3):hover{ box-shadow:9px 9px 0 var(--sun); }
.category-card:nth-child(4n+4):hover{ box-shadow:9px 9px 0 var(--violet); }

.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:2px solid var(--ink);
  background:var(--sun);
  transition:transform .3s cubic-bezier(.34,1.56,.64,1);
}

.category-card:hover .card-icon{ transform:rotate(-8deg) scale(1.06); }

.category-card:nth-child(4n+2) .card-icon{ background:#CDEFE9; }
.category-card:nth-child(4n+3) .card-icon{ background:#FFE1D6; }
.category-card:nth-child(4n+4) .card-icon{ background:#E1DAFF; }

.card-link{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:16px;
  font-weight:800;
  font-size:0.85rem;
  text-decoration:none;
  color:var(--vermilion);
  transition:gap .22s ease, color .22s ease;
}

.card-link::after{
  content:'→';
  font-size:0.95rem;
  transition:transform .22s ease;
}

.card-link:hover{ gap:10px; }

/* ============ 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:2px solid var(--ink);
  box-shadow:12px 12px 0 var(--teal);
  background:var(--card);
}

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

.feature-text{ position:relative; }

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

.feature-list li{
  padding:9px 0;
  display:flex;
  align-items:center;
  gap:11px;
  font-weight:500;
  color:var(--ink);
}

.feature-list li::before{
  content:'✓';
  font-weight:900;
  color:#fff;
  background:var(--teal);
  width:21px; height:21px;
  border-radius:50%;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:0.68rem;
  flex:0 0 auto;
}

/* ============ 数据条 ============ */
.stats-bar{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:20px;
  text-align:center;
}

.stat-item{
  padding:32px 20px;
  border-radius:16px;
  border:2px solid var(--ink);
  background:var(--card);
  transition:transform .26s cubic-bezier(.34,1.2,.64,1), box-shadow .26s ease;
}

.stat-item:hover{
  transform:translateY(-6px);
  box-shadow:6px 6px 0 var(--ink);
}

.stat-number{
  font-size:2.5rem;
  font-weight:900;
  letter-spacing:-0.045em;
  line-height:1;
  color:var(--vermilion);
  font-variant-numeric:tabular-nums;
}

.stat-item:nth-child(2) .stat-number{ color:var(--teal); }
.stat-item:nth-child(3) .stat-number{ color:var(--violet); }
.stat-item:nth-child(4) .stat-number{ color:#D89A00; }

.stat-label{
  font-size:0.88rem;
  color:var(--ink-soft);
  margin-top:12px;
  font-weight:500;
}

/* ============ 内容墙 ============ */
.content-wall{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(280px, 1fr));
  gap:24px;
}

.content-wall-item{
  border-radius:16px;
  overflow:hidden;
  border:2px solid var(--ink);
  background:var(--card);
  transition:transform .28s cubic-bezier(.34,1.2,.64,1), box-shadow .28s cubic-bezier(.34,1.2,.64,1);
  box-shadow:5px 5px 0 rgba(24,20,16,.09);
}

.content-wall-item:hover{
  transform:translate(-4px,-4px);
  box-shadow:9px 9px 0 var(--violet);
}

.content-wall-item img{
  width:100%;
  height:200px;
  object-fit:cover;
  transition:transform .55s cubic-bezier(.2,.8,.2,1);
}

.content-wall-item:hover img{ transform:scale(1.06); }

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

.content-wall-body h3{
  font-size:1.05rem;
  font-weight:800;
  letter-spacing:-0.015em;
  margin-bottom:8px;
}

.content-wall-body p{
  color:var(--ink-soft);
  font-size:0.92rem;
  line-height:1.75;
}

/* ============ FAQ ============ */
.faq-list{
  max-width:800px;
  margin:0 auto;
}

.faq-item{
  border:2px solid var(--line);
  border-radius:14px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  background:var(--card);
  transition:border-color .24s ease, box-shadow .24s ease;
}

.faq-item:hover{ border-color:var(--ink); }

.faq-item.open{
  border-color:var(--ink);
  box-shadow:6px 6px 0 var(--sun);
}

.faq-item .faq-question{
  padding:19px 22px;
  font-weight:700;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
}

.faq-item .faq-question::after{
  content:'+';
  font-size:1.35rem;
  font-weight:900;
  line-height:1;
  color:var(--vermilion);
  transition:transform .3s cubic-bezier(.34,1.56,.64,1);
}

.faq-item.open .faq-question::after{ transform:rotate(45deg); }

.faq-item .faq-answer{
  padding:0 22px 20px;
  display:none;
  color:var(--ink-soft);
  line-height:1.85;
  font-size:0.95rem;
}

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

/* ============ CTA 横幅 ============ */
.cta-banner{
  position:relative;
  overflow:hidden;
  padding:66px 40px;
  text-align:center;
  border-radius:24px;
  color:#fff;
  border:2px solid var(--ink);
  background:linear-gradient(120deg, #FF3B12 0%, #FF7A1A 55%, #FFC93C 100%);
  box-shadow:10px 10px 0 var(--ink);
}

.cta-banner::before{
  content:'';
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(255,255,255,.35) 1.6px, transparent 1.6px);
  background-size:18px 18px;
  opacity:.45;
  pointer-events:none;
}

.cta-banner h2{
  position:relative;
  color:#fff;
  font-size:clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight:900;
  letter-spacing:-0.028em;
  margin-bottom:12px;
}

.cta-banner p{
  position:relative;
  opacity:.96;
  margin-bottom:28px;
  font-size:1.02rem;
}

.cta-banner .btn-primary{
  position:relative;
  background:#fff;
  color:var(--ink);
  box-shadow:4px 4px 0 rgba(24,20,16,.85);
}

.cta-banner .btn-primary:hover{ box-shadow:1px 1px 0 rgba(24,20,16,.85); }

/* ============ 页脚 ============ */
.site-footer{
  padding:72px 0 32px;
  background:var(--paper-3);
  border-top:2px 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{
  color:var(--ink-soft);
  max-width:320px;
  font-size:0.92rem;
  line-height:1.85;
}

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

.footer-col h4{
  font-size:0.78rem;
  letter-spacing:2.5px;
  text-transform:uppercase;
  font-weight:900;
  margin-bottom:16px;
  color:var(--ink);
}

.footer-col a{
  display:block;
  text-decoration:none;
  color:var(--ink-soft);
  font-size:0.92rem;
  padding:5px 0;
  transition:color .22s ease, transform .22s ease;
}

.footer-col a:hover{
  color:var(--vermilion);
  transform:translateX(5px);
}

.footer-bottom{
  border-top:1px solid var(--line);
  margin-top:44px;
  padding-top:22px;
  text-align:center;
  font-size:0.85rem;
  color:var(--ink-soft);
}

/* ============ 工具类 ============ */
.text-accent{ color:var(--vermilion); }
.text-center{ text-align:center; }

.seo-description{
  max-width:640px;
  margin:0 auto 48px;
  color:var(--ink-soft);
  line-height:1.9;
}

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

/* ============ 响应式 ============ */
@media (max-width: 1024px){
  .hero .container{ grid-template-columns:1fr; gap:44px; }
  .hero-content{ max-width:100%; }
  .hero-image{ box-shadow:8px 8px 0 var(--sun); }
  .feature-block{ gap:44px; }
}

@media (max-width: 768px){
  .section{ padding:72px 0; }
  .hero{ padding:130px 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; gap:32px; }

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

  .main-nav.open{
    display:flex;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    position:absolute;
    top:68px;
    left:0;
    width:100%;
    background:var(--paper);
    padding:18px 24px 26px;
    border-bottom:2px solid var(--ink);
    box-shadow:0 20px 34px rgba(24,20,16,.14);
  }

  .main-nav.open a{
    width:100%;
    padding:13px 0;
    border-bottom:1px solid var(--line);
    font-size:0.95rem;
  }

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

  .main-nav.open a.nav-cta{
    border-bottom:none;
    margin-top:16px;
    text-align:center;
    padding:12px 22px;
  }

  .cta-banner{ padding:52px 24px; border-radius:20px; box-shadow:7px 7px 0 var(--ink); }
}

@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; align-items:stretch; }
  .hero-buttons .btn{ width:100%; }

  .hero h1{ letter-spacing:-0.028em; }
  .hero-image{ box-shadow:6px 6px 0 var(--sun); }
  .feature-image{ box-shadow:7px 7px 0 var(--teal); }

  .logo{ font-size:1rem; }
  .logo-icon{ width:34px; height:34px; }
}