/* =========================================================
   黑料不打烊官网 · 设计系统
   风格：Acid Paper Brutalism（酸性纸张 · 粗野编辑风）
   Palette：奶纸白 / 深紫墨 / 荧光酸绿 / 番茄橙
   ========================================================= */

:root{
  --ink:#1E0F2E;
  --ink-soft:#4C3A62;
  --paper:#F7F2E6;
  --paper-2:#EFE7D3;
  --card:#FFFDF6;
  --acid:#D8F94E;
  --acid-deep:#B7DB2E;
  --flame:#FF5533;
  --line:2px solid var(--ink);
  --shadow-s:4px 4px 0 var(--ink);
  --shadow-m:6px 6px 0 var(--ink);
  --shadow-l:10px 10px 0 var(--ink);
  --radius:14px;
  --ease:cubic-bezier(.2,.7,.3,1);
}

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

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  background-color:var(--paper);
  color:var(--ink);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(circle at 12% 8%, rgba(216,249,78,.45) 0, transparent 26%),
    radial-gradient(circle at 88% 4%, rgba(255,85,51,.18) 0, transparent 22%),
    repeating-linear-gradient(0deg, rgba(30,15,46,.035) 0 1px, transparent 1px 32px),
    repeating-linear-gradient(90deg, rgba(30,15,46,.035) 0 1px, transparent 1px 32px);
  background-attachment:fixed;
}

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

h1,h2,h3,h4 { font-weight:900; letter-spacing:-.035em; line-height:1.12; }
p { color:var(--ink-soft); }
a { color:inherit; }
img { display:block; max-width:100%; }

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

.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background:#f8f9fa; }
.section:nth-child(even){ background:var(--paper-2); }
.section:nth-child(odd){ background:transparent; }

/* ============ 导航 ============ */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(247,242,230,.86);
  backdrop-filter:blur(10px);
  border-bottom:1px solid #eee;
  border-bottom:var(--line);
}
.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:-.04em;
  text-decoration:none; color:inherit;
}
.logo-icon {
  width:36px; height:36px; border-radius:8px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem;
  background:var(--acid);
  border:var(--line);
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .25s var(--ease);
}
.logo:hover .logo-icon { transform:rotate(-8deg) translate(-1px,-1px); }

.main-nav { display:flex; align-items:center; gap:26px; list-style:none; }
.main-nav a {
  text-decoration:none; font-size:.9rem; font-weight:600;
  transition:.2s var(--ease); position:relative; padding:2px 0;
}
.main-nav a::after {
  content:''; position:absolute; left:0; bottom:-3px;
  width:0; height:3px; background:var(--acid);
  transition:width .28s var(--ease);
}
.main-nav a:hover::after { width:100%; }

.nav-cta {
  padding:8px 20px; border-radius:8px; color:#fff!important;
  font-weight:700;
  background:var(--ink);
  border:var(--line);
  box-shadow:3px 3px 0 var(--acid);
  transition:.2s var(--ease);
}
.nav-cta::after { display:none; }
.nav-cta:hover { transform:translate(-2px,-2px); box-shadow:5px 5px 0 var(--acid); }

.menu-toggle { display:none; }

/* ============ Hero ============ */
.hero {
  min-height:70vh; display:flex; align-items:center;
  padding-top:110px;
  position:relative;
}
.hero::after {
  content:''; position:absolute; right:-40px; bottom:6%;
  width:220px; height:220px; border-radius:50%;
  background:var(--acid); opacity:.5; filter:blur(60px);
  pointer-events:none;
}
.hero-content { max-width:720px; position:relative; z-index:2; }

.hero-eyebrow {
  display:inline-block; font-size:.85rem; font-weight:700;
  padding:5px 16px; border-radius:20px; margin-bottom:20px;
  letter-spacing:.14em;
  background:var(--acid);
  border:var(--line);
  box-shadow:var(--shadow-s);
  transform:rotate(-2deg);
}
.hero h1 {
  font-size:clamp(2.6rem, 5.6vw, 4.4rem);
  line-height:1.05; margin-bottom:22px;
}
.hero h1 strong,
.hero h1 em {
  font-style:normal;
  background:linear-gradient(transparent 62%, var(--acid) 62%);
  padding:0 .06em;
}
.hero p {
  font-size:1.1rem; opacity:.75; max-width:560px; margin-bottom:34px;
}
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }
.hero-image {
  border-radius:12px; overflow:hidden;
  border:var(--line);
  box-shadow:var(--shadow-l);
  background:var(--card);
}
.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; font-size:.95rem;
  cursor:pointer; border:none; text-decoration:none;
  transition:.22s var(--ease);
}
.btn-primary {
  color:#fff;
  background:var(--ink);
  border:var(--line);
  box-shadow:var(--shadow-s);
}
.btn-primary:hover {
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 var(--acid);
}
.btn-outline {
  background:transparent; border:1.5px solid;
  border:var(--line);
  color:var(--ink);
  box-shadow:var(--shadow-s);
}
.btn-outline:hover {
  background:var(--acid);
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 var(--ink);
}

/* ============ 标题体系 ============ */
.section-label {
  display:inline-flex; align-items:center; gap:10px;
  font-size:.78rem; font-weight:800;
  letter-spacing:.3em; text-transform:uppercase;
  margin-bottom:16px;
  color:var(--ink);
}
.section-label::before {
  content:''; width:28px; height:4px;
  background:var(--acid); border:1.5px solid var(--ink);
  display:inline-block;
}
.section-title { font-size:clamp(1.8rem, 3.4vw, 2.6rem); margin-bottom:16px; }
.section-desc { max-width:600px; opacity:.75; margin-bottom:44px; }

/* ============ 卡片网格 ============ */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(260px,1fr));
  gap:26px;
}
.category-card {
  border-radius:12px; padding:28px;
  border:1px solid #eee;
  background:var(--card);
  border:var(--line);
  box-shadow:4px 4px 0 rgba(30,15,46,.14);
  transition:.26s var(--ease);
  position:relative;
  overflow:hidden;
}
.category-card::before {
  content:''; position:absolute; inset:auto auto -40px -40px;
  width:110px; height:110px; border-radius:50%;
  background:var(--acid); opacity:0; transition:opacity .3s var(--ease);
}
.category-card:hover {
  transform:translate(-4px,-4px);
  box-shadow:var(--shadow-m);
}
.category-card:hover::before { opacity:.55; }

.card-icon {
  width:48px; height:48px; border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.3rem;
  background:var(--acid);
  border:var(--line);
  box-shadow:3px 3px 0 var(--ink);
}
.card-link {
  font-weight:800; font-size:.85rem; text-decoration:none;
  display:inline-flex; align-items:center; gap:6px;
  border-bottom:2px solid var(--acid);
  padding-bottom:2px;
  transition:.2s var(--ease);
}
.card-link:hover { gap:12px; 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:12px; overflow:hidden;
  border:var(--line);
  box-shadow:var(--shadow-l);
  background:var(--card);
}
.feature-image img { width:100%; height:auto; }
.feature-text h3 { font-size:1.7rem; margin-bottom:14px; }
.feature-list { list-style:none; margin-top:22px; }
.feature-list li {
  padding:9px 0; display:flex; align-items:center; gap:12px;
  font-weight:600; font-size:.95rem;
  border-bottom:1px dashed rgba(30,15,46,.22);
}
.feature-list li:last-child { border-bottom:none; }
.feature-list li::before {
  content:'✓'; font-weight:900; font-size:.72rem;
  width:22px; height:22px; flex:0 0 22px;
  display:flex; align-items:center; justify-content:center;
  background:var(--acid); color:var(--ink);
  border:1.5px solid var(--ink); border-radius:6px;
}

/* ============ 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:12px;
  border:1px solid #eee;
  background:var(--card);
  border:var(--line);
  box-shadow:var(--shadow-s);
  transition:.24s var(--ease);
}
.stat-item:hover {
  background:var(--acid);
  transform:translate(-3px,-3px);
  box-shadow:var(--shadow-m);
}
.stat-number {
  font-size:2.6rem; font-weight:900; letter-spacing:-.05em;
  line-height:1;
}
.stat-label {
  font-size:.85rem; opacity:.65; margin-top:10px;
  font-weight:600; letter-spacing:.06em;
}

/* ============ 内容墙 ============ */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap:26px;
}
.content-wall-item {
  border-radius:12px; overflow:hidden;
  border:1px solid #eee;
  background:var(--card);
  border:var(--line);
  box-shadow:4px 4px 0 rgba(30,15,46,.14);
  transition:.26s var(--ease);
}
.content-wall-item:hover {
  transform:translate(-4px,-4px);
  box-shadow:var(--shadow-m);
}
.content-wall-item img {
  width:100%; height:200px; object-fit:cover;
  border-bottom:var(--line);
  filter:saturate(1.05);
  transition:transform .5s var(--ease);
}
.content-wall-item:hover img { transform:scale(1.045); }
.content-wall-body { padding:20px; }
.content-wall-body h3 { font-size:1.1rem; margin-bottom:8px; }
.content-wall-body p { font-size:.9rem; opacity:.75; }

/* ============ FAQ ============ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:1px solid #eee; border-radius:10px;
  margin-bottom:10px; overflow:hidden; cursor:pointer;
  background:var(--card);
  border:var(--line);
  box-shadow:3px 3px 0 rgba(30,15,46,.14);
  transition:.22s var(--ease);
}
.faq-item:hover { transform:translate(-2px,-2px); box-shadow:var(--shadow-s); }
.faq-item .faq-question {
  padding:18px 22px; 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;
  width:26px; height:26px; flex:0 0 26px;
  display:flex; align-items:center; justify-content:center;
  background:var(--acid); border:1.5px solid var(--ink); border-radius:7px;
}
.faq-item.open .faq-question::after { content:'–'; }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:.75; }
.faq-item.open { background:var(--paper-2); }
.faq-item.open .faq-answer { display:block; }

/* ============ CTA 横幅 ============ */
.cta-banner {
  padding:56px 24px; text-align:center; border-radius:12px;
  color:#fff;
  background:var(--ink);
  border:var(--line);
  box-shadow:var(--shadow-l);
  position:relative; overflow:hidden;
  background-image:
    radial-gradient(circle at 82% 18%, rgba(216,249,78,.35) 0, transparent 38%),
    radial-gradient(circle at 10% 90%, rgba(255,85,51,.3) 0, transparent 36%);
}
.cta-banner h2 {
  color:#fff; font-size:clamp(1.7rem,3.4vw,2.5rem);
  margin-bottom:14px; letter-spacing:-.04em;
}
.cta-banner p { color:rgba(255,255,255,.72); margin-bottom:28px; }
.cta-banner .btn-primary {
  background:#fff; color:var(--ink);
  border:var(--line);
  box-shadow:4px 4px 0 var(--acid);
}
.cta-banner .btn-primary:hover { box-shadow:8px 8px 0 var(--acid); }

/* ============ 页脚 ============ */
.site-footer {
  padding:56px 0 28px;
  background:var(--paper-2);
  border-top:var(--line);
}
.site-footer .container { }
.footer-grid {
  display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px;
}
.footer-brand p { opacity:.7; font-size:.92rem; max-width:320px; margin-top:14px; }
.footer-col h4 {
  font-size:.78rem; letter-spacing:.24em; text-transform:uppercase;
  margin-bottom:16px; font-weight:900;
}
.footer-col ul { list-style:none; }
.footer-col li { margin-bottom:9px; }
.footer-col a {
  text-decoration:none; font-size:.9rem; opacity:.72;
  transition:.2s var(--ease);
}
.footer-col a:hover { opacity:1; border-bottom:2px solid var(--acid); }
.footer-bottom {
  border-top:1px solid rgba(255,255,255,0.1);
  border-top:1px dashed rgba(30,15,46,.28);
  margin-top:40px; padding-top:20px;
  text-align:center; font-size:.85rem; opacity:.65;
}

/* ============ 工具类 ============ */
.text-accent { color:var(--flame); font-weight:900; }
.text-center { text-align:center; }
.text-center .section-desc { margin-left:auto; margin-right:auto; }
.text-center .section-label { justify-content:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:.75; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ============ 响应式 ============ */
@media (max-width: 768px) {
  .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; align-items:center; justify-content:center;
    width:42px; height:42px; font-size:1.1rem; cursor:pointer;
    background:var(--acid); border:var(--line); border-radius:8px;
    box-shadow:3px 3px 0 var(--ink); color:var(--ink);
  }
  .main-nav.open {
    display:flex; flex-direction:column; align-items:flex-start;
    position:absolute; top:68px; left:0; width:100%;
    background:#fff; padding:20px; gap:16px;
    border-bottom:var(--line);
  }
  .section { padding:60px 0; }
}

@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 { justify-content:center; }
  .hero { padding-top:96px; }
  .stat-number { font-size:2.1rem; }
}