/* ============================================================
   黑料泄密 · 企业风险黑匣子
   Design System — "DOSSIER / 档案纸" 风格
   浅色纸本 · 硬阴影 · 酸性荧光 · 编辑部式排版
   ============================================================ */

:root{
  --paper:#F7F4EC;
  --paper-deep:#EFEADC;
  --white:#FFFFFF;
  --ink:#1B1C33;
  --ink-soft:#4A4C63;
  --ink-line:#1B1C33;
  --lime:#DFFF4F;
  --lime-soft:#EEFFB0;
  --verm:#FF4D2E;
  --verm-soft:#FFE2DB;
  --sky:#C9E7FF;
  --violet:#6C4DFF;
  --rule:1.5px;
  --shadow-hard:6px 6px 0 var(--ink);
  --shadow-lime:6px 6px 0 var(--lime);
  --radius:2px;
}

/* ---------- 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(27,28,51,.10) 1px, transparent 1px),
    radial-gradient(rgba(27,28,51,.06) 1px, transparent 1px);
  background-size:22px 22px, 22px 22px;
  background-position:0 0, 11px 11px;
  color:var(--ink);
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}

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

img{ display:block; max-width:100%; }
a{ color:inherit; }
h1,h2,h3,h4{ font-weight:900; line-height:1.15; letter-spacing:-.02em; }

::-webkit-scrollbar{ width:12px; }
::-webkit-scrollbar-track{ background:var(--paper-deep); }
::-webkit-scrollbar-thumb{ background:var(--ink); border:3px solid var(--paper-deep); }

/* ---------- 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:var(--white);
  border-top:var(--rule) dashed rgba(27,28,51,.25);
  border-bottom:var(--rule) dashed rgba(27,28,51,.25);
}

/* ---------- 导航 — 固定顶部 ---------- */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(247,244,236,.92);
  backdrop-filter:blur(10px) saturate(1.4);
  -webkit-backdrop-filter:blur(10px) saturate(1.4);
  border-bottom:var(--rule) solid var(--ink);
}
.site-header::after{
  content:''; position:absolute; left:0; bottom:-1.5px; width:100%; height:3px;
  background:repeating-linear-gradient(90deg, var(--lime) 0 28px, transparent 28px 56px);
  opacity:.9;
}

.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:1.15rem; letter-spacing:-.03em;
  text-decoration:none; color:var(--ink); white-space:nowrap;
}
.logo-icon {
  width:36px; height:36px; border-radius:var(--radius);
  display:flex; align-items:center; justify-content:center;
  font-size:1rem; font-weight:900;
  background:var(--lime); color:var(--ink);
  border:var(--rule) solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-4deg);
  transition:.25s cubic-bezier(.2,.9,.3,1.4);
}
.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); position:relative; padding:4px 0;
  transition:.2s;
}
.main-nav a::after{
  content:''; position:absolute; left:0; bottom:-2px; width:0; height:3px;
  background:var(--verm); transition:width .25s ease;
}
.main-nav a:hover::after{ width:100%; }
.main-nav a:hover{ color:var(--verm); }

.nav-cta {
  padding:8px 20px !important;
  border-radius:var(--radius);
  background:var(--ink) !important;
  color:var(--lime) !important;
  font-weight:800 !important;
  border:var(--rule) solid var(--ink);
  box-shadow:3px 3px 0 var(--verm);
  transition:.2s;
}
.nav-cta:hover{ transform:translate(-2px,-2px); box-shadow:5px 5px 0 var(--verm); }
.nav-cta::after{ display:none; }

.menu-toggle {
  display:none; width:42px; height:42px; align-items:center; justify-content:center;
  background:var(--white); border:var(--rule) solid var(--ink);
  border-radius:var(--radius); 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;
}
.hero::before{
  content:'CASE FILE / 机密';
  position:absolute; right:24px; top:104px;
  font-size:.68rem; font-weight:800; letter-spacing:.35em;
  color:var(--verm); transform:rotate(90deg); transform-origin:right top;
  opacity:.75; white-space:nowrap;
}
.hero-content { max-width:720px; }

.hero-eyebrow {
  display:inline-block; font-size:.78rem; font-weight:800;
  letter-spacing:.22em; text-transform:uppercase;
  padding:6px 16px; margin-bottom:22px;
  border-radius:40px;
  background:var(--lime);
  border:var(--rule) solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
}
.hero h1 {
  font-size:clamp(2.2rem, 5.4vw, 3.6rem);
  line-height:1.08; margin-bottom:24px;
  letter-spacing:-.045em;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(transparent 62%, var(--lime) 62%);
  padding:0 .08em;
}
.hero p {
  font-size:1.1rem; color:var(--ink-soft);
  max-width:560px; margin-bottom:32px;
}
.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }

.hero-image {
  border-radius:var(--radius); overflow:hidden;
  border:var(--rule) solid var(--ink);
  box-shadow:var(--shadow-hard);
  background:var(--white);
}
.hero-image img { width:100%; height:auto; transition:.4s; }
.hero-image:hover img{ transform:scale(1.03); }

/* ---------- 按钮 ---------- */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 28px; border-radius:var(--radius);
  font-weight:800; font-size:.95rem; letter-spacing:.01em;
  cursor:pointer; border:var(--rule) solid var(--ink);
  text-decoration:none; transition:.2s cubic-bezier(.2,.9,.3,1.2);
  box-shadow:4px 4px 0 var(--ink);
}
.btn:hover{ transform:translate(-3px,-3px); box-shadow:7px 7px 0 var(--ink); }
.btn:active{ transform:translate(1px,1px); box-shadow:2px 2px 0 var(--ink); }

.btn-primary { background:var(--verm); color:var(--white); }
.btn-primary:hover{ background:var(--lime); color:var(--ink); }

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

/* ---------- 标签 / 标题 ---------- */
.section-label {
  display:inline-block; font-size:.72rem; font-weight:900;
  letter-spacing:.28em; text-transform:uppercase;
  margin-bottom:14px; padding:5px 12px;
  background:var(--ink); color:var(--lime);
  border-radius:var(--radius);
}
.section-title {
  font-size:clamp(1.6rem, 3.4vw, 2.4rem);
  margin-bottom:16px; letter-spacing:-.035em;
}
.section-title::after{
  content:''; display:block; width:64px; height:6px;
  background:var(--verm); margin-top:16px;
}
.text-center .section-title::after,
.section-title.text-center::after{ margin-left:auto; margin-right:auto; }

.section-desc { max-width:600px; color:var(--ink-soft); margin-bottom:40px; }

/* ---------- 卡片网格 ---------- */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:24px;
}
.category-card {
  border-radius:var(--radius); padding:28px;
  border:var(--rule) solid var(--ink);
  background:var(--white);
  box-shadow:var(--shadow-hard);
  transition:.25s cubic-bezier(.2,.9,.3,1.2);
  position:relative;
  overflow:hidden;
}
.category-card::before{
  content:''; position:absolute; top:0; right:0;
  width:44px; height:44px;
  background:repeating-linear-gradient(135deg, var(--lime) 0 6px, transparent 6px 12px);
  opacity:.55;
}
.category-card:hover {
  transform:translate(-4px,-4px);
  box-shadow:10px 10px 0 var(--lime), 10px 10px 0 2px var(--ink);
}
.category-card h3{ font-size:1.15rem; margin-bottom:10px; letter-spacing:-.02em; }
.category-card p{ font-size:.92rem; color:var(--ink-soft); margin-bottom:18px; }

.card-icon {
  width:48px; height:48px; border-radius:var(--radius);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:16px; font-size:1.3rem;
  border:var(--rule) solid var(--ink);
  background:var(--lime);
  box-shadow:3px 3px 0 var(--ink);
}
.category-card:nth-child(2n) .card-icon{ background:var(--sky); }
.category-card:nth-child(3n) .card-icon{ background:var(--verm-soft); }
.category-card:nth-child(4n) .card-icon{ background:var(--lime-soft); }

.card-link {
  font-weight:800; font-size:.85rem; text-decoration:none;
  color:var(--ink); letter-spacing:.02em;
  border-bottom:2px solid var(--verm); padding-bottom:2px;
  transition:.2s;
}
.card-link:hover{ background:var(--lime); border-color:var(--ink); }

/* ---------- 特性块 ---------- */
.feature-block {
  display:grid; grid-template-columns:1fr 1fr;
  gap:56px; align-items:center;
}
.feature-image {
  border-radius:var(--radius); overflow:hidden;
  border:var(--rule) solid var(--ink);
  box-shadow:8px 8px 0 var(--lime), 8px 8px 0 2px var(--ink);
  background:var(--white);
  transform:rotate(-1.2deg);
  transition:.3s;
}
.feature-image:hover{ transform:rotate(0deg); }
.feature-image img { width:100%; height:auto; }

.feature-text h3{ font-size:1.6rem; margin-bottom:14px; letter-spacing:-.03em; }
.feature-text p{ color:var(--ink-soft); margin-bottom:18px; }

.feature-list { list-style:none; }
.feature-list li {
  padding:10px 0; display:flex; align-items:flex-start; gap:10px;
  border-bottom:1.5px dashed rgba(27,28,51,.2);
  font-size:.95rem;
}
.feature-list li:last-child{ border-bottom:none; }
.feature-list li::before {
  content:'✓'; font-weight:900;
  flex:0 0 22px; height:22px; margin-top:3px;
  display:inline-flex; align-items:center; justify-content:center;
  font-size:.72rem; color:var(--ink);
  background:var(--lime); border:1.5px solid var(--ink);
  border-radius:50%;
}

/* ---------- 数据条 ---------- */
.stats-bar {
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:24px; text-align:center;
}
.stat-item {
  padding:28px 20px; border-radius:var(--radius);
  border:var(--rule) solid var(--ink);
  background:var(--white);
  box-shadow:4px 4px 0 var(--ink);
  transition:.25s;
  position:relative;
}
.stat-item:hover{
  transform:translateY(-5px);
  box-shadow:4px 10px 0 var(--verm);
}
.stat-number {
  font-size:clamp(1.8rem, 3.6vw, 2.4rem); font-weight:900;
  letter-spacing:-.05em; font-variant-numeric:tabular-nums;
  line-height:1;
}
.stat-number::after{
  content:''; display:block; width:34px; height:5px;
  background:var(--lime); border:1.5px solid var(--ink);
  margin:12px auto 0;
}
.stat-label { font-size:.85rem; color:var(--ink-soft); margin-top:12px; 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:var(--radius); overflow:hidden;
  border:var(--rule) solid var(--ink);
  background:var(--white);
  box-shadow:5px 5px 0 var(--ink);
  transition:.25s cubic-bezier(.2,.9,.3,1.2);
  display:flex; flex-direction:column;
}
.content-wall-item:hover {
  transform:translate(-3px,-3px);
  box-shadow:9px 9px 0 var(--lime), 9px 9px 0 2px var(--ink);
}
.content-wall-item img {
  width:100%; height:200px; object-fit:cover;
  border-bottom:var(--rule) solid var(--ink);
  filter:saturate(.9) contrast(1.05);
  transition:.4s;
}
.content-wall-item:hover img{ filter:saturate(1.15); transform:scale(1.04); }
.content-wall-body { padding:20px; flex:1; }
.content-wall-body h4{ font-size:1.05rem; margin-bottom:8px; letter-spacing:-.02em; }
.content-wall-body p{ font-size:.88rem; color:var(--ink-soft); }
.content-wall-body time,
.content-wall-body .meta{
  display:block; margin-top:14px;
  font-size:.72rem; font-weight:800; letter-spacing:.18em;
  color:var(--verm); text-transform:uppercase;
}

/* ---------- FAQ ---------- */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:var(--rule) solid var(--ink); border-radius:var(--radius);
  margin-bottom:10px; overflow:hidden; cursor:pointer;
  background:var(--white);
  box-shadow:3px 3px 0 var(--ink);
  transition:.2s;
}
.faq-item:hover{ transform:translate(-2px,-2px); box-shadow:5px 5px 0 var(--ink); }
.faq-item .faq-question {
  padding:16px 20px; font-weight:800; font-size:1rem;
  display:flex; justify-content:space-between; align-items:center; gap:16px;
}
.faq-item .faq-question::after{
  content:'+'; font-size:1.3rem; font-weight:900; line-height:1;
  flex:0 0 26px; height:26px; display:inline-flex;
  align-items:center; justify-content:center;
  border:1.5px solid var(--ink); border-radius:50%;
  background:var(--lime); transition:.25s;
}
.faq-item.open .faq-question::after{ content:'–'; background:var(--verm); color:var(--white); }
.faq-item .faq-answer {
  padding:0 20px 16px; display:none;
  color:var(--ink-soft); font-size:.94rem;
}
.faq-item.open { background:var(--lime-soft); }
.faq-item.open .faq-answer { display:block; }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding:64px 32px; text-align:center;
  border-radius:var(--radius);
  background:var(--lime);
  color:var(--ink);
  border:var(--rule) solid var(--ink);
  box-shadow:10px 10px 0 var(--ink);
  position:relative;
  overflow:hidden;
}
.cta-banner::before{
  content:''; position:absolute; inset:12px;
  border:1.5px dashed rgba(27,28,51,.35);
  pointer-events:none;
}
.cta-banner h2 {
  color:var(--ink); font-size:clamp(1.5rem, 3.4vw, 2.2rem);
  margin-bottom:14px; letter-spacing:-.035em;
}
.cta-banner p{ color:rgba(27,28,51,.75); max-width:560px; margin:0 auto 28px; }
.cta-banner .btn-primary {
  background:var(--ink); color:var(--lime);
  box-shadow:4px 4px 0 var(--verm);
}
.cta-banner .btn-primary:hover{ background:var(--verm); color:var(--white); }

/* ---------- 页脚 ---------- */
.site-footer {
  padding:64px 0 28px;
  background:var(--paper-deep);
  border-top:var(--rule) solid var(--ink);
  position:relative;
}
.site-footer::before{
  content:''; position:absolute; top:0; left:0; width:100%; height:6px;
  background:repeating-linear-gradient(90deg, var(--verm) 0 18px, var(--lime) 18px 36px, var(--ink) 36px 54px);
}
.site-footer .container { position:relative; }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }

.footer-brand .logo{ margin-bottom:16px; }
.footer-brand p{ font-size:.9rem; color:var(--ink-soft); max-width:320px; }

.footer-col h4{
  font-size:.75rem; font-weight:900; letter-spacing:.22em;
  text-transform:uppercase; margin-bottom:16px; color:var(--ink);
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:10px; }
.footer-col a{
  text-decoration:none; font-size:.9rem; color:var(--ink-soft);
  transition:.2s; border-bottom:1.5px solid transparent;
}
.footer-col a:hover{ color:var(--verm); border-color:var(--verm); }

.footer-bottom {
  border-top:1.5px dashed rgba(27,28,51,.3);
  margin-top:44px; padding-top:22px;
  text-align:center; font-size:.82rem; color:var(--ink-soft);
  letter-spacing:.04em;
}

/* ---------- 工具类 ---------- */
.text-accent{ color:var(--verm); }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; color:var(--ink-soft); }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px){
  .hero{ padding:130px 0 72px; }
  .feature-block{ gap:36px; }
  .footer-grid{ grid-template-columns:1.6fr 1fr 1fr; }
}

@media (max-width: 768px) {
  .section{ padding:60px 0; }
  .hero::before{ display:none; }
  .feature-block { grid-template-columns:1fr; }
  .feature-image{ transform:none; }
  .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:stretch;
    position:absolute; top:68px; left:0; width:100%;
    background:var(--paper); padding:20px 24px 26px; gap:6px;
    border-bottom:var(--rule) solid var(--ink);
    box-shadow:0 12px 0 rgba(27,28,51,.08);
  }
  .main-nav.open a{ padding:12px 4px; border-bottom:1.5px dashed rgba(27,28,51,.2); font-size:1rem; }
  .main-nav.open .nav-cta{ margin-top:14px; text-align:center; justify-content:center; display:flex; }
}

@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{ justify-content:center; }
  .cta-banner{ padding:44px 22px; box-shadow:6px 6px 0 var(--ink); }
  .btn{ box-shadow:3px 3px 0 var(--ink); }
}