/* ============================================================
   禁漫天空 — 设计系统
   风格：亮纸印刷 / 新粗野编辑主义 (Bright Risograph Editorial)
   配色：暖纸白 + 珊瑚橙 + 电光紫 + 荧光青柠
   ============================================================ */

:root{
  --paper:#FFFBF3;
  --paper-2:#F5EFE1;
  --paper-3:#EFE7D6;
  --ink:#241436;
  --ink-soft:#6A5B80;
  --coral:#FF4B2B;
  --violet:#5B2EDD;
  --lime:#D9FF5B;
  --sky:#BEE7FF;
  --line:#E3DAC6;
  --r:14px;
  --shadow-hard:6px 6px 0 var(--ink);
  --shadow-soft:0 18px 40px -22px rgba(36,20,54,.45);
}

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

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);
  background-image:
    radial-gradient(rgba(91,46,221,.09) 1px, transparent 1px),
    radial-gradient(rgba(255,75,43,.07) 1px, transparent 1px);
  background-size:22px 22px, 22px 22px;
  background-position:0 0, 11px 11px;
  color:var(--ink);
  line-height:1.65;
  font-size:16px;
  letter-spacing:.01em;
}

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

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

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

.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background:#F6F1E4; }

/* 章节装饰：斜切色带 */
.section:nth-child(even)::before{
  content:"";
  position:absolute; top:0; left:0; right:0; height:4px;
  background:repeating-linear-gradient(90deg,var(--coral) 0 24px,var(--violet) 24px 48px,var(--lime) 48px 72px);
  opacity:.85;
}

/* ============================ 导航 — 固定顶部 ============================ */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(255,251,243,0.94);
  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:8px;
  font-weight:800; font-size:1.2rem; text-decoration:none; color:inherit;
  letter-spacing:-.02em;
}

.logo-icon {
  width:36px; height:36px; border-radius:8px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem;
  background:var(--coral);
  color:#fff;
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-6deg);
  transition:transform .25s ease;
}
.logo:hover .logo-icon{ transform:rotate(6deg) scale(1.05); }

.main-nav { display:flex; align-items:center; gap:24px; list-style:none; }

.main-nav a {
  text-decoration:none; font-size:.9rem; font-weight:600;
  color:var(--ink); transition:0.2s; position:relative; padding:4px 0;
}
.main-nav a::after{
  content:""; position:absolute; left:0; bottom:-2px; height:3px; width:0;
  background:var(--coral); border-radius:2px; transition:width .25s ease;
}
.main-nav a:hover{ color:var(--violet); }
.main-nav a:hover::after{ width:100%; }

.nav-cta {
  padding:8px 20px; border-radius:8px; color:#fff!important; font-weight:700;
  background:var(--violet);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .18s ease, box-shadow .18s ease, background .2s;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{
  background:var(--coral)!important; color:#fff;
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 var(--ink);
}

.menu-toggle {
  display:none;
  width:44px; height:38px; border-radius:8px;
  align-items:center; justify-content:center;
  background:var(--lime); border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  font-size:1.1rem; cursor:pointer; color:var(--ink);
}

/* ============================ 首页Hero ============================ */
.hero {
  min-height:70vh; display:flex; align-items:center;
  padding:150px 0 90px;
  position:relative; overflow:hidden;
  background:
    radial-gradient(720px 420px at 88% 12%, rgba(217,255,91,.55), transparent 62%),
    radial-gradient(560px 380px at 6% 92%, rgba(190,231,255,.6), transparent 65%),
    linear-gradient(180deg,#FFFBF3 0%, #FBF4E6 100%);
}

.hero::after{
  content:"";
  position:absolute; right:-90px; top:120px;
  width:300px; height:300px; border-radius:50%;
  border:2px dashed rgba(91,46,221,.35);
  animation:spin 46s linear infinite;
  pointer-events:none;
}
@keyframes spin{ to{ transform:rotate(360deg); } }

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

.hero-eyebrow {
  display:inline-block; font-size:.85rem; font-weight:700;
  padding:4px 14px; border-radius:20px; margin-bottom:16px;
  background:var(--lime); color:var(--ink);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  letter-spacing:.06em;
  text-transform:uppercase;
}

.hero h1 {
  font-size:clamp(2.3rem, 5.6vw, 4.2rem);
  line-height:1.08; margin-bottom:20px;
  font-weight:900; letter-spacing:-.035em;
}
.hero h1 em{
  font-style:normal;
  color:var(--violet);
  background:linear-gradient(transparent 62%, var(--lime) 62%);
  padding:0 .08em;
}

.hero p {
  font-size:1.1rem; opacity:.7; max-width:560px; margin-bottom:32px;
  color:var(--ink-soft);
}

.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }

.hero-image {
  border-radius:12px; overflow:hidden;
  border:2px solid var(--ink);
  box-shadow:var(--shadow-hard);
  background:#fff;
}
.hero-image img { width:100%; height:auto; }

/* ============================ 按钮 ============================ */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:12px 28px; border-radius:8px; font-weight:700;
  cursor:pointer; border:2px solid var(--ink); text-decoration:none;
  transition:0.2s; font-size:.95rem; letter-spacing:.01em;
  box-shadow:4px 4px 0 var(--ink);
}
.btn:active{ transform:translate(3px,3px); box-shadow:1px 1px 0 var(--ink); }

.btn-primary { color:#fff; background:var(--coral); }
.btn-primary:hover{
  background:var(--violet);
  transform:translate(3px,3px);
  box-shadow:1px 1px 0 var(--ink);
}

.btn-outline {
  background:transparent; border:2px solid var(--ink); color:var(--ink);
}
.btn-outline:hover{
  background:var(--lime);
  transform:translate(3px,3px);
  box-shadow:1px 1px 0 var(--ink);
}

/* ============================ 标签 / 标题 ============================ */
.section-label {
  display:inline-block; font-size:.78rem; font-weight:800;
  letter-spacing:.24em; margin-bottom:12px;
  text-transform:uppercase; color:var(--coral);
  padding-left:38px; position:relative;
}
.section-label::before{
  content:""; position:absolute; left:0; top:50%;
  width:28px; height:4px; border-radius:2px;
  background:var(--violet);
  transform:translateY(-50%);
}

.section-title {
  font-size:clamp(1.6rem,3.2vw,2.4rem);
  margin-bottom:14px; font-weight:900; letter-spacing:-.03em; line-height:1.18;
}

.section-desc {
  max-width:600px; opacity:.72; margin-bottom:40px;
  color:var(--ink-soft); font-size:1.02rem;
}

/* ============================ 卡片网格 ============================ */
.cards-grid {
  display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:24px;
}

.category-card {
  border-radius:12px; padding:28px;
  border:2px solid var(--ink); background:#fff;
  transition:0.22s ease; position:relative; overflow:hidden;
  box-shadow:0 0 0 var(--ink);
}
.category-card::after{
  content:""; position:absolute; right:-28px; bottom:-28px;
  width:78px; height:78px; border-radius:50%;
  background:var(--paper-2); opacity:.55; transition:.3s ease;
}
.category-card:hover {
  transform:translateY(-4px);
  box-shadow:var(--shadow-hard);
}
.category-card:hover::after{ transform:scale(1.6); opacity:.35; }

.category-card:nth-child(4n+1) .card-icon{ background:var(--coral); color:#fff; }
.category-card:nth-child(4n+2) .card-icon{ background:var(--lime); color:var(--ink); }
.category-card:nth-child(4n+3) .card-icon{ background:var(--violet); color:#fff; }
.category-card:nth-child(4n+4) .card-icon{ background:var(--sky); color:var(--ink); }

.card-icon {
  width:48px; height:48px; border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px; font-size:1.3rem;
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  position:relative; z-index:2;
}

.category-card h3{
  font-size:1.08rem; font-weight:800; margin-bottom:6px;
  letter-spacing:-.015em; position:relative; z-index:2;
}
.category-card p{ opacity:.68; font-size:.92rem; position:relative; z-index:2; }

.card-link {
  font-weight:800; font-size:.85rem; text-decoration:none;
  color:var(--violet); display:inline-flex; align-items:center; gap:6px;
  margin-top:14px; position:relative; z-index:2;
  border-bottom:2px solid transparent; transition:.2s;
}
.card-link:hover{ color:var(--coral); border-bottom-color:var(--coral); }

/* ============================ 特性块 ============================ */
.feature-block {
  display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:center;
}

.feature-image {
  border-radius:12px; overflow:hidden;
  border:2px solid var(--ink);
  box-shadow:var(--shadow-hard);
  background:#fff;
}
.feature-image img { width:100%; height:auto; }

.feature-text { }

.feature-text h2{
  font-size:clamp(1.5rem,2.8vw,2.1rem); font-weight:900;
  letter-spacing:-.03em; margin-bottom:14px; line-height:1.2;
}
.feature-text p{ color:var(--ink-soft); opacity:.85; margin-bottom:20px; }

.feature-list { list-style:none; }
.feature-list li {
  padding:6px 0; display:flex; align-items:center; gap:8px;
  font-weight:600; font-size:.96rem;
}
.feature-list li::before {
  content:'✓'; font-weight:900;
  width:22px; height:22px; flex:0 0 22px;
  display:flex; align-items:center; justify-content:center;
  border-radius:50%; background:var(--lime); color:var(--ink);
  border:2px solid var(--ink); font-size:.72rem; line-height:1;
}

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

.stat-item {
  padding:24px; border-radius:12px;
  border:2px solid var(--ink); background:#fff;
  box-shadow:4px 4px 0 var(--ink);
  transition:.22s ease;
}
.stat-item:hover{ transform:translateY(-4px) rotate(-.6deg); }

.stat-number {
  font-size:2.2rem; font-weight:900; letter-spacing:-.04em;
  color:var(--violet); line-height:1.1;
}
.stat-item:nth-child(even) .stat-number{ color:var(--coral); }

.stat-label { font-size:.9rem; opacity:.6; margin-top:6px; font-weight:600; }

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

.content-wall-item {
  border-radius:12px; overflow:hidden; border:2px solid var(--ink);
  background:#fff; transition:0.22s ease;
  position:relative;
}
.content-wall-item:hover {
  transform:translateY(-4px);
  box-shadow:var(--shadow-hard);
}
.content-wall-item img { width:100%; height:200px; object-fit:cover; }

.content-wall-body { padding:20px; }
.content-wall-body h3{ font-size:1.02rem; font-weight:800; margin-bottom:6px; letter-spacing:-.015em; }
.content-wall-body p{ font-size:.9rem; opacity:.66; color:var(--ink-soft); }

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

.faq-item {
  border:2px solid var(--ink); border-radius:10px;
  margin-bottom:10px; overflow:hidden; cursor:pointer;
  background:#fff; transition:.2s ease;
  box-shadow:3px 3px 0 rgba(36,20,54,.12);
}
.faq-item:hover{ box-shadow:4px 4px 0 var(--ink); }

.faq-item .faq-question {
  padding:16px 20px; font-weight:800; font-size:.98rem;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
}
.faq-item .faq-question::after{
  content:"+"; font-size:1.3rem; font-weight:700; color:var(--coral);
  transition:transform .25s ease; line-height:1;
}
.faq-item.open .faq-question::after{ transform:rotate(45deg); }

.faq-item .faq-answer {
  padding:0 20px 16px; display:none; opacity:.7;
  color:var(--ink-soft); font-size:.94rem;
}
.faq-item.open { background:#FDFBEF; border-color:var(--violet); }
.faq-item.open .faq-answer { display:block; }
.faq-item.open .faq-question{ color:var(--violet); }

/* ============================ CTA横幅 ============================ */
.cta-banner {
  padding:56px 24px; text-align:center; border-radius:12px; color:#fff;
  background:
    radial-gradient(rgba(217,255,91,.30) 1.5px, transparent 1.5px) 0 0/18px 18px,
    linear-gradient(120deg, var(--violet) 0%, #7A45FF 52%, var(--coral) 100%);
  border:2px solid var(--ink);
  box-shadow:var(--shadow-hard);
  position:relative; overflow:hidden;
}
.cta-banner::before{
  content:""; position:absolute; inset:10px;
  border:1.5px dashed rgba(255,255,255,.35); border-radius:8px; pointer-events:none;
}
.cta-banner h2 {
  color:#fff; font-size:clamp(1.5rem,3vw,2.2rem);
  font-weight:900; letter-spacing:-.03em; margin-bottom:12px;
}
.cta-banner p{ opacity:.88; margin:0 auto 26px; max-width:520px; }
.cta-banner .btn-primary {
  background:#fff; color:var(--ink);
  border:2px solid var(--ink); box-shadow:4px 4px 0 var(--ink);
}
.cta-banner .btn-primary:hover{ background:var(--lime); transform:translate(3px,3px); box-shadow:1px 1px 0 var(--ink); }

/* ============================ 页脚 ============================ */
.site-footer {
  padding:56px 0 28px;
  background:var(--paper-2);
  border-top:2px solid var(--ink);
  position:relative;
}
.site-footer::before{
  content:""; position:absolute; top:-2px; left:0; width:100%; height:6px;
  background:repeating-linear-gradient(90deg,var(--lime) 0 40px,var(--violet) 40px 80px,var(--coral) 80px 120px);
  opacity:.9;
}
.site-footer .container { }

.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }

.footer-brand { }
.footer-brand .logo{ margin-bottom:14px; }
.footer-brand p{ font-size:.9rem; color:var(--ink-soft); max-width:320px; opacity:.85; }

.footer-col { }
.footer-col h4{
  font-size:.82rem; font-weight:800; letter-spacing:.14em;
  text-transform:uppercase; margin-bottom:16px; color:var(--violet);
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:10px; }
.footer-col a{
  text-decoration:none; color:var(--ink-soft); font-size:.9rem;
  transition:.2s; border-bottom:2px solid transparent;
}
.footer-col a:hover{ color:var(--coral); border-bottom-color:var(--coral); }

.footer-bottom {
  border-top:1px solid var(--line); margin-top:40px; padding-top:20px;
  text-align:center; font-size:.85rem; color:var(--ink-soft); opacity:.85;
}

/* ============================ 工具类 ============================ */
.text-accent { color:var(--coral); }
.text-center { text-align:center; }
.text-center .section-desc{ margin-left:auto; margin-right:auto; }

.seo-description { max-width:600px; margin:0 auto 48px; opacity:.7; color:var(--ink-soft); }

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

/* ============================ 响应式 ============================ */
@media (max-width: 900px){
  .footer-grid { grid-template-columns:1.4fr 1fr 1fr; }
}

@media (max-width: 768px) {
  .section{ padding:64px 0; }
  .feature-block { grid-template-columns:1fr; gap:32px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; }

  .main-nav.open {
    display:flex; flex-direction:column; align-items:flex-start; gap:16px;
    position:absolute; top:68px; left:0; width:100%;
    background:var(--paper); padding:24px;
    border-bottom:2px solid var(--ink);
    box-shadow:0 14px 24px -18px rgba(36,20,54,.6);
  }
  .main-nav.open a{ font-size:1rem; }
  .main-nav.open .nav-cta{ width:100%; justify-content:center; }

  .hero{ padding:120px 0 70px; }
  .hero::after{ display: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-buttons .btn{ width:100%; justify-content:center; }
  .btn{ padding:13px 22px; }
  .section-title{ letter-spacing:-.02em; }
}