/* ============================================================
   黑料百科 · 档案纸设计系统
   风格：证据档案 / 手账涂鸦 / 高亮标记
   色板：暖纸白 + 高亮黄 + 荧光粉 + 电光紫 + 墨黑
   ============================================================ */

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

:root {
  --paper:      #FDFBF6;
  --paper-2:    #F4EEE1;
  --paper-3:    #FFFFFF;
  --ink:        #151210;
  --ink-70:     rgba(21,18,16,.70);
  --ink-45:     rgba(21,18,16,.45);
  --ink-15:     rgba(21,18,16,.14);
  --hi:         #FFE94A;
  --pop:        #FF3D6E;
  --violet:     #6C4BFF;
  --mint:       #1FCFA4;
  --ink-deep:   #151210;
  --mono: ui-monospace, 'SFMono-Regular', 'Menlo', 'Consolas', 'Courier New', monospace;
}

html { scroll-behavior:smooth; scroll-padding-top:88px; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  background-color: var(--paper);
  background-image:
    radial-gradient(rgba(21,18,16,.085) 1px, transparent 1px),
    radial-gradient(rgba(21,18,16,.05) 1px, transparent 1px);
  background-size: 26px 26px, 26px 26px;
  background-position: 0 0, 13px 13px;
}

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

a { color: inherit; }

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

.section {
  padding:80px 0;
  position:relative;
}

.section:nth-child(even) {
  background: var(--paper-2);
  border-top: 1px solid var(--ink-15);
  border-bottom: 1px solid var(--ink-15);
}

/* ---------- 导航 ---------- */
.site-header {
  position:fixed;
  top:0; left:0;
  width:100%;
  z-index:1000;
  background: rgba(253,251,246,.92);
  backdrop-filter: blur(10px) saturate(1.2);
  -webkit-backdrop-filter: blur(10px) saturate(1.2);
  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:10px;
  font-weight:900;
  font-size:1.2rem;
  letter-spacing:-.02em;
  text-decoration:none;
  color:inherit;
}

.logo-icon {
  width:36px; height:36px;
  border-radius:2px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  background: var(--hi);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-5deg);
  transition: transform .2s ease, box-shadow .2s ease;
}

.logo:hover .logo-icon {
  transform: rotate(5deg) scale(1.05);
  box-shadow: 3px 3px 0 var(--pop);
}

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

.main-nav a {
  text-decoration:none;
  font-size:.9rem;
  font-weight:600;
  letter-spacing:.01em;
  transition:.2s;
  position:relative;
  padding:4px 2px;
}

.main-nav a::after {
  content:'';
  position:absolute;
  left:0; bottom:0;
  width:0; height:6px;
  background: var(--hi);
  z-index:-1;
  transition: width .22s ease;
}

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

.nav-cta {
  padding:8px 20px;
  border-radius:2px;
  color: var(--ink) !important;
  font-weight:800;
  background: var(--pop);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease;
}

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

.nav-cta:hover {
  transform: translate(-2px,-2px);
  box-shadow: 5px 5px 0 var(--ink);
  background: var(--hi);
}

.menu-toggle { display:none; }

/* ---------- Hero ---------- */
.hero {
  min-height:70vh;
  display:flex;
  align-items:center;
  padding: 148px 0 96px;
  position:relative;
  overflow:hidden;
}

.hero::before {
  content:'';
  position:absolute;
  top: 100px; right:-90px;
  width: 340px; height:340px;
  border-radius:50%;
  background: radial-gradient(circle at 35% 35%, rgba(255,61,110,.32), rgba(108,75,255,.10) 55%, transparent 72%);
  filter: blur(6px);
  pointer-events:none;
}

.hero::after {
  content:'';
  position:absolute;
  left:-60px; bottom:-40px;
  width:240px; height:240px;
  background: repeating-linear-gradient(45deg, rgba(21,18,16,.09) 0 2px, transparent 2px 11px);
  pointer-events:none;
}

.hero-content { max-width:760px; position:relative; z-index:1; }

.hero-eyebrow {
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-family: var(--mono);
  font-size:.78rem;
  font-weight:700;
  letter-spacing:.16em;
  text-transform: uppercase;
  padding:5px 14px;
  border-radius:2px;
  margin-bottom:24px;
  background: var(--paper-3);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--hi);
}

.hero-eyebrow::before {
  content:'';
  width:8px; height:8px;
  background: var(--pop);
  border-radius:50%;
  box-shadow: 0 0 0 3px rgba(255,61,110,.22);
  animation: pulse 1.8s ease-in-out infinite;
}

@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50%     { opacity:.45; transform:scale(.8); }
}

.hero h1 {
  font-size: clamp(2.3rem, 5.6vw, 4.2rem);
  line-height:1.06;
  letter-spacing:-.035em;
  font-weight:900;
  margin-bottom:24px;
}

.hero h1 em {
  font-style:normal;
  background: linear-gradient(180deg, transparent 58%, var(--hi) 58%, var(--hi) 94%, transparent 94%);
  padding:0 .08em;
}

.hero p {
  font-size:1.08rem;
  color: var(--ink-70);
  max-width:560px;
  margin-bottom:36px;
}

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

.hero-image {
  border-radius:2px;
  overflow:hidden;
  border:2px solid var(--ink);
  box-shadow: 9px 9px 0 var(--ink);
}

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

/* ---------- 按钮 ---------- */
.btn {
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:13px 30px;
  border-radius:2px;
  font-weight:800;
  font-size:.95rem;
  letter-spacing:.01em;
  cursor:pointer;
  border:2px solid var(--ink);
  text-decoration:none;
  transition: transform .16s ease, box-shadow .16s ease, background .16s ease, color .16s ease;
}

.btn-primary {
  color: var(--ink);
  background: var(--pop);
  box-shadow: 5px 5px 0 var(--ink);
}

.btn-primary:hover {
  background: var(--hi);
  transform: translate(-3px,-3px);
  box-shadow: 8px 8px 0 var(--ink);
}

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

.btn-outline {
  background: var(--paper-3);
  color: var(--ink);
  border:2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--ink-15);
}

.btn-outline:hover {
  background: var(--ink);
  color: var(--hi);
  transform: translate(-3px,-3px);
  box-shadow: 8px 8px 0 var(--violet);
}

/* ---------- 标题 / 标签 ---------- */
.section-label {
  display:inline-block;
  font-family: var(--mono);
  font-size:.74rem;
  font-weight:800;
  letter-spacing:.22em;
  text-transform: uppercase;
  margin-bottom:16px;
  padding:4px 12px;
  background: var(--hi);
  border:2px solid var(--ink);
  transform: rotate(-2deg);
  box-shadow: 3px 3px 0 var(--ink-15);
}

.section-title {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.2;
  margin-bottom:16px;
}

.section-title::after {
  content:'';
  display:block;
  width:56px;
  height:7px;
  margin-top:16px;
  background: var(--pop);
  border:2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--hi);
}

.text-center .section-title::after { margin-left:auto; margin-right:auto; }

.section-desc {
  max-width:600px;
  color: var(--ink-70);
  margin-bottom:44px;
  font-size:1.02rem;
}

.text-center .section-desc { margin-left:auto; margin-right:auto; }

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

.category-card {
  border-radius:2px;
  padding:28px 26px 26px;
  background: var(--paper-3);
  border:2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  position:relative;
}

.category-card::after {
  content:'';
  position:absolute;
  top:10px; right:12px;
  width:9px; height:9px;
  border-radius:50%;
  background: var(--ink-15);
  transition: background .18s ease;
}

.category-card:hover {
  transform: translate(-4px,-4px);
  box-shadow: 10px 10px 0 var(--pop);
}

.category-card:hover::after { background: var(--mint); }

.card-icon {
  width:48px; height:48px;
  border-radius:2px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
  font-size:1.3rem;
  background: var(--hi);
  border:2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-4deg);
}

.category-card:nth-child(2n) .card-icon { background:#D9F4EA; transform: rotate(3deg); }
.category-card:nth-child(3n) .card-icon { background:#EDE6FF; transform: rotate(-2deg); }
.category-card:nth-child(4n) .card-icon { background:#FFE1E8; transform: rotate(5deg); }

.category-card h3 {
  font-size:1.12rem;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:10px;
}

.category-card p {
  font-size:.92rem;
  color: var(--ink-70);
  margin-bottom:18px;
}

.card-link {
  font-weight:800;
  font-size:.85rem;
  text-decoration:none;
  color: var(--ink);
  border-bottom:2px solid var(--pop);
  padding-bottom:2px;
  transition: background .18s ease, color .18s ease, padding .18s ease;
}

.card-link:hover {
  background: var(--hi);
  padding:2px 8px;
  border-bottom-color: var(--ink);
}

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

.feature-image {
  border-radius:2px;
  overflow:hidden;
  border:2px solid var(--ink);
  box-shadow: 10px 10px 0 var(--violet);
  position:relative;
}

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

.feature-text { position:relative; }

.feature-text h3 {
  font-size:1.6rem;
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.25;
  margin-bottom:16px;
}

.feature-text p {
  color: var(--ink-70);
  margin-bottom:22px;
}

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

.feature-list li {
  padding:9px 0;
  display:flex;
  align-items:flex-start;
  gap:10px;
  font-size:.95rem;
  border-bottom:1px dashed var(--ink-15);
}

.feature-list li::before {
  content:'✓';
  font-weight:900;
  flex:0 0 auto;
  width:22px; height:22px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:.78rem;
  background: var(--hi);
  border:2px solid var(--ink);
  border-radius:2px;
  transform: translateY(2px);
}

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

.stat-item {
  padding:28px 18px;
  border-radius:2px;
  background: var(--paper-3);
  border:2px dashed var(--ink);
  transition: transform .18s ease, background .18s ease, border-style .18s ease;
}

.stat-item:hover {
  transform: translateY(-5px) rotate(-1deg);
  background: var(--hi);
  border-style:solid;
}

.stat-number {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight:900;
  letter-spacing:-.045em;
  line-height:1;
  font-variant-numeric: tabular-nums;
}

.stat-item:nth-child(1) .stat-number { color: var(--pop); }
.stat-item:nth-child(2) .stat-number { color: var(--violet); }
.stat-item:nth-child(3) .stat-number { color: var(--mint); }
.stat-item:nth-child(4) .stat-number { color: var(--ink); }

.stat-item:hover .stat-number { color: var(--ink); }

.stat-label {
  font-family: var(--mono);
  font-size:.82rem;
  letter-spacing:.08em;
  color: var(--ink-70);
  margin-top:10px;
}

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

.content-wall-item {
  border-radius:2px;
  overflow:hidden;
  background: var(--paper-3);
  border:2px solid var(--ink);
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform .18s ease, box-shadow .18s ease;
  display:flex;
  flex-direction:column;
}

.content-wall-item:hover {
  transform: translate(-4px,-4px);
  box-shadow: 10px 10px 0 var(--violet);
}

.content-wall-item img {
  width:100%;
  height:200px;
  object-fit:cover;
  display:block;
  border-bottom:2px solid var(--ink);
  filter: grayscale(1) contrast(1.08);
  transition: filter .3s ease, transform .5s ease;
}

.content-wall-item:hover img {
  filter: grayscale(0) contrast(1);
  transform: scale(1.03);
}

.content-wall-body { padding:20px 22px 24px; }

.content-wall-body h4 {
  font-size:1.05rem;
  font-weight:800;
  letter-spacing:-.02em;
  margin-bottom:8px;
}

.content-wall-body p {
  font-size:.9rem;
  color: var(--ink-70);
}

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

.faq-item {
  background: var(--paper-3);
  border:2px solid var(--ink);
  border-radius:2px;
  margin-bottom:12px;
  overflow:hidden;
  cursor:pointer;
  box-shadow: 4px 4px 0 var(--ink-15);
  transition: box-shadow .18s ease, transform .18s ease;
}

.faq-item:hover { box-shadow: 4px 4px 0 var(--hi); }

.faq-item.open {
  box-shadow: 6px 6px 0 var(--pop);
  transform: translate(-2px,-2px);
}

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

.faq-item .faq-question::after {
  content:'＋';
  font-weight:900;
  font-size:1.1rem;
  color: var(--ink);
  flex:0 0 auto;
  transition: transform .22s ease;
}

.faq-item.open .faq-question::after {
  content:'－';
  transform: rotate(180deg);
  color: var(--pop);
}

.faq-item .faq-answer {
  padding:0 22px 18px;
  display:none;
  color: var(--ink-70);
  font-size:.94rem;
  border-top:1px dashed var(--ink-15);
  padding-top:14px;
  margin:0 22px 4px;
  padding-left:0;
  padding-right:0;
}

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

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding:64px 32px;
  text-align:center;
  border-radius:2px;
  color:#fff;
  background:
    repeating-linear-gradient(-45deg, rgba(255,255,255,.07) 0 8px, transparent 8px 18px),
    linear-gradient(120deg, var(--pop) 0%, var(--violet) 100%);
  border:2px solid var(--ink);
  box-shadow: 10px 10px 0 var(--hi);
  position:relative;
  overflow:hidden;
}

.cta-banner h2 {
  color:#fff;
  font-size: clamp(1.5rem, 3.2vw, 2.2rem);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.2;
  margin-bottom:14px;
}

.cta-banner p {
  color: rgba(255,255,255,.86);
  max-width:520px;
  margin:0 auto 28px;
}

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

.cta-banner .btn-primary:hover {
  background: var(--hi);
  transform: translate(-3px,-3px);
  box-shadow: 8px 8px 0 var(--ink);
}

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

.site-footer::before {
  content:'档案编号 · 1112321033';
  position:absolute;
  top:-13px; left:50%;
  transform: translateX(-50%) rotate(-1.5deg);
  font-family: var(--mono);
  font-size:.68rem;
  letter-spacing:.18em;
  background: var(--hi);
  border:2px solid var(--ink);
  padding:2px 12px;
  white-space:nowrap;
}

.site-footer .container { position:relative; }

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

.footer-brand { max-width:340px; }

.footer-brand .logo { margin-bottom:14px; }

.footer-brand p {
  font-size:.9rem;
  color: var(--ink-70);
}

.footer-col h4 {
  font-family: var(--mono);
  font-size:.74rem;
  font-weight:800;
  letter-spacing:.2em;
  text-transform: uppercase;
  margin-bottom:16px;
  color: var(--ink);
  padding-bottom:6px;
  border-bottom:2px solid var(--hi);
  display:inline-block;
}

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

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

.footer-col a {
  font-size:.9rem;
  text-decoration:none;
  color: var(--ink-70);
  transition: color .18s ease, padding .18s ease, background .18s ease;
}

.footer-col a:hover {
  color: var(--ink);
  background: var(--hi);
  padding:2px 6px;
}

.footer-bottom {
  border-top:1px dashed var(--ink-45);
  margin-top:44px;
  padding-top:20px;
  text-align:center;
  font-size:.82rem;
  font-family: var(--mono);
  letter-spacing:.04em;
  color: var(--ink-70);
}

/* ---------- 工具类 ---------- */
.text-accent { color: var(--pop); font-weight:800; }
.text-center { text-align:center; }

.seo-description {
  max-width:620px;
  margin:0 auto 48px;
  color: var(--ink-70);
  font-size:.98rem;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .feature-block { gap:36px; }
  .footer-grid { grid-template-columns:1.4fr 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding:60px 0; }
  .hero { padding:126px 0 72px; }
  .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;
    align-items:center;
    justify-content:center;
    width:42px; height:38px;
    background: var(--hi);
    border:2px solid var(--ink);
    border-radius:2px;
    box-shadow: 3px 3px 0 var(--ink);
    font-size:1rem;
    font-weight:900;
    cursor:pointer;
  }
  .main-nav.open {
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:4px;
    position:absolute;
    top:68px; left:0;
    width:100%;
    background: var(--paper);
    padding:20px 24px 26px;
    border-bottom:2px solid var(--ink);
    box-shadow: 0 12px 0 rgba(21,18,16,.08);
  }
  .main-nav.open li { width:100%; }
  .main-nav.open a {
    display:block;
    width:100%;
    padding:11px 4px;
    border-bottom:1px dashed var(--ink-15);
    font-size:1rem;
  }
  .main-nav.open .nav-cta {
    margin-top:14px;
    text-align:center;
    background: var(--pop);
  }
}

@media (max-width: 480px) {
  .container { padding:0 18px; }
  .header-inner { padding:0 18px; }
  .cards-grid,
  .content-wall,
  .stats-bar { grid-template-columns:1fr; }
  .footer-grid { grid-template-columns:1fr; }
  .hero-buttons { flex-direction:column; align-items:stretch; }
  .btn { justify-content:center; }
  .cta-banner { padding:48px 22px; }
  .hero::before { display:none; }
}