/* =========================================================
   抖音黑料 · 品牌避雷针
   设计风格：Neo-Brutalist Editorial（新粗野主义杂志风）
   配色：奶油纸白 + 警示橙 + 酸性青柠
   ========================================================= */

:root{
  --paper:#FBF6EC;
  --paper-alt:#F3EBDC;
  --ink:#14100C;
  --ink-soft:#7A6E60;
  --accent:#FF4A21;
  --accent-dark:#D93410;
  --accent-soft:#FFE0D5;
  --lime:#D8F34E;
  --mint:#CFEFE3;
  --radius:14px;
  --hard:6px 6px 0 var(--ink);
  --hard-sm:3px 3px 0 var(--ink);
}

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

html{ scroll-behavior:smooth; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  color:var(--ink);
  background-color:var(--paper);
  background-image:radial-gradient(rgba(20,16,12,0.06) 1px, transparent 1px);
  background-size:24px 24px;
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
}

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

img{ 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:var(--paper-alt); }

/* ---------- 导航 ---------- */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(251,246,236,0.88);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  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:800; font-size:1.15rem; text-decoration:none;
  color:var(--ink); letter-spacing:-0.02em;
}
.logo-icon {
  width:36px; height:36px; border-radius:9px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem; background:var(--accent); color:#fff;
  border:2px solid var(--ink); box-shadow:2px 2px 0 var(--ink);
}
.main-nav { display:flex; align-items:center; gap:22px; list-style:none; }
.main-nav a {
  position:relative; text-decoration:none; font-size:0.88rem;
  font-weight:700; color:var(--ink); padding:8px 2px; transition:0.2s;
}
.main-nav a::after {
  content:''; position:absolute; left:0; bottom:2px;
  width:0; height:2px; background:var(--accent);
  transition:width 0.24s cubic-bezier(.6,0,.3,1);
}
.main-nav a:hover { color:var(--accent); }
.main-nav a:hover::after { width:100%; }

.nav-cta {
  padding:10px 22px; border-radius:9px;
  color:#fff !important; font-weight:800;
  background:var(--accent);
  border:2px solid var(--ink);
  box-shadow:var(--hard-sm);
  transition:0.18s;
}
.nav-cta::after { display:none; }
.nav-cta:hover {
  background:var(--ink);
  color:var(--paper) !important;
  transform:translate(2px,2px);
  box-shadow:1px 1px 0 var(--ink);
}
.menu-toggle {
  display:none; width:40px; height:40px;
  border:2px solid var(--ink); border-radius:10px;
  background:#fff; align-items:center; justify-content:center;
  cursor:pointer; font-size:1.05rem; box-shadow:var(--hard-sm);
}

/* ---------- 首页 Hero ---------- */
.hero {
  min-height:70vh; display:flex; align-items:center;
  padding-top:120px; padding-bottom:80px;
  position:relative; overflow:hidden;
}
.hero::before {
  content:''; position:absolute; top:-180px; right:-180px;
  width:540px; height:540px; border-radius:50%;
  background:radial-gradient(circle at 32% 32%, var(--lime), transparent 68%);
  opacity:0.55; pointer-events:none;
}
.hero::after {
  content:''; position:absolute; bottom:6%; right:7%;
  width:210px; height:210px; border-radius:50%;
  border:2px dashed rgba(20,16,12,0.22);
  pointer-events:none;
  animation:spin 44s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

.hero-content { max-width:720px; position:relative; z-index:2; }
.hero-eyebrow {
  display:inline-block; font-size:0.74rem; font-weight:900;
  letter-spacing:0.18em; padding:6px 15px; border-radius:999px;
  margin-bottom:22px; background:var(--lime); color:var(--ink);
  border:2px solid var(--ink); box-shadow:2px 2px 0 var(--ink);
  text-transform:uppercase;
}
.hero h1 {
  font-size:clamp(2.1rem, 5.2vw, 3.5rem);
  line-height:1.1; margin-bottom:24px;
  font-weight:900; letter-spacing:-0.035em;
}
.hero h1 span { color:var(--accent); }
.hero p {
  font-size:1.05rem; color:var(--ink-soft);
  max-width:560px; margin-bottom:36px; line-height:1.8;
}
.hero-buttons { display:flex; gap:16px; flex-wrap:wrap; }
.hero-image {
  border-radius:var(--radius); overflow:hidden;
  border:2px solid var(--ink); box-shadow:8px 8px 0 var(--ink);
  background:#fff;
}
.hero-image img { width:100%; height:auto; display:block; }

/* ---------- 按钮 ---------- */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 28px; border-radius:10px;
  font-weight:800; font-size:0.92rem; cursor:pointer;
  border:2px solid var(--ink); text-decoration:none;
  transition:0.18s; letter-spacing:0.01em;
}
.btn-primary {
  background:var(--accent); color:#fff;
  box-shadow:4px 4px 0 var(--ink);
}
.btn-primary:hover {
  background:var(--accent-dark);
  transform:translate(3px,3px);
  box-shadow:1px 1px 0 var(--ink);
}
.btn-outline {
  background:transparent; color:var(--ink);
  box-shadow:4px 4px 0 var(--ink);
}
.btn-outline:hover {
  background:var(--ink); color:var(--paper);
  transform:translate(3px,3px);
  box-shadow:1px 1px 0 var(--ink);
}

/* ---------- 标签 / 标题 ---------- */
.section-label {
  display:inline-block; font-size:0.72rem; font-weight:900;
  letter-spacing:0.22em; margin-bottom:16px;
  padding:6px 13px; background:var(--ink); color:var(--paper);
  border-radius:7px; text-transform:uppercase;
}
.section-title {
  font-size:clamp(1.6rem, 3.2vw, 2.3rem);
  margin-bottom:16px; font-weight:900;
  letter-spacing:-0.03em; line-height:1.22;
}
.section-desc {
  max-width:620px; color:var(--ink-soft);
  margin-bottom:44px; line-height:1.8;
}

/* ---------- 卡片网格 ---------- */
.cards-grid {
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px,1fr));
  gap:22px;
}
.category-card {
  border-radius:var(--radius); padding:28px;
  border:2px solid var(--ink); background:#fff;
  box-shadow:5px 5px 0 rgba(20,16,12,0.13);
  transition:0.22s cubic-bezier(.6,0,.3,1);
}
.category-card:hover {
  transform:translate(-3px,-3px);
  box-shadow:9px 9px 0 var(--ink);
}
.card-icon {
  width:48px; height:48px; border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.3rem;
  background:var(--accent-soft); border:2px solid var(--ink);
}
.category-card:nth-child(3n+2) .card-icon { background:var(--lime); }
.category-card:nth-child(3n+3) .card-icon { background:var(--mint); }
.category-card h3 {
  font-size:1.05rem; font-weight:800;
  margin-bottom:8px; letter-spacing:-0.01em;
}
.category-card p {
  font-size:0.88rem; color:var(--ink-soft);
  line-height:1.75; margin-bottom:16px;
}
.card-link {
  font-weight:800; font-size:0.84rem; text-decoration:none;
  color:var(--ink); display:inline-flex; align-items:center; gap:6px;
  border-bottom:2px solid var(--accent); padding-bottom:2px;
  transition:0.18s;
}
.card-link:hover { color:var(--accent); gap:10px; }

/* ---------- 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:2px solid var(--ink); box-shadow:8px 8px 0 var(--ink);
  background:#fff;
}
.feature-image img { width:100%; height:auto; display:block; }
.feature-text h3 {
  font-size:1.35rem; font-weight:900;
  letter-spacing:-0.02em; margin-bottom:12px;
}
.feature-text p { color:var(--ink-soft); line-height:1.8; }
.feature-list { list-style:none; margin-top:26px; }
.feature-list li {
  padding:11px 0; display:flex; align-items:flex-start; gap:12px;
  border-bottom:1px dashed rgba(20,16,12,0.18);
  font-size:0.95rem; font-weight:500;
}
.feature-list li::before {
  content:'✓'; font-weight:900; color:#fff;
  background:var(--accent);
  width:22px; height:22px; border-radius:7px;
  display:flex; align-items:center; justify-content:center;
  font-size:0.72rem; flex-shrink:0; margin-top:2px;
}
.feature-list li:nth-child(even)::before { background:var(--ink); }

/* ---------- 数据条 ---------- */
.stats-bar {
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:20px; text-align:center;
}
.stat-item {
  padding:30px 18px; border-radius:var(--radius);
  border:2px solid var(--ink); background:#fff;
  transition:0.2s;
}
.stat-item:nth-child(2) { background:var(--lime); }
.stat-item:nth-child(4) { background:var(--accent-soft); }
.stat-item:hover { transform:translateY(-4px); box-shadow:var(--hard-sm); }
.stat-number {
  font-size:clamp(1.8rem, 3.4vw, 2.4rem);
  font-weight:900; letter-spacing:-0.04em;
  color:var(--accent); line-height:1.1;
}
.stat-item:nth-child(2) .stat-number,
.stat-item:nth-child(3) .stat-number { color:var(--ink); }
.stat-label {
  font-size:0.85rem; color:var(--ink-soft);
  margin-top:10px; 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:2px solid var(--ink); background:#fff;
  transition:0.22s cubic-bezier(.6,0,.3,1);
}
.content-wall-item:hover {
  transform:translate(-3px,-3px);
  box-shadow:9px 9px 0 var(--ink);
}
.content-wall-item img {
  width:100%; height:200px; object-fit:cover; display:block;
  border-bottom:2px solid var(--ink);
}
.content-wall-body { padding:22px; }
.content-wall-body h3 {
  font-size:1rem; font-weight:800;
  margin-bottom:8px; line-height:1.45;
}
.content-wall-body p {
  font-size:0.88rem; color:var(--ink-soft); line-height:1.75;
}

/* ---------- FAQ ---------- */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:2px solid var(--ink); border-radius:13px;
  margin-bottom:12px; overflow:hidden; cursor:pointer;
  background:#fff; transition:0.2s;
}
.faq-item:hover { transform:translateX(3px); }
.faq-item .faq-question {
  padding:19px 22px; font-weight:800;
  display:flex; justify-content:space-between; align-items:center;
  gap:16px; font-size:0.98rem;
}
.faq-item .faq-question::after {
  content:'+'; font-size:1.35rem; font-weight:900;
  color:var(--accent); line-height:1; transition:0.2s;
}
.faq-item.open .faq-question::after { content:'–'; }
.faq-item.open { box-shadow:5px 5px 0 var(--lime); }
.faq-item .faq-answer {
  padding:0 22px 20px; display:none;
  color:var(--ink-soft); line-height:1.85; font-size:0.92rem;
  border-top:1px dashed rgba(20,16,12,0.16);
  padding-top:16px; margin-top:0;
}
.faq-item.open .faq-answer { display:block; }

/* ---------- CTA 横幅 ---------- */
.cta-banner {
  padding:66px 28px; text-align:center;
  border-radius:20px; color:#fff;
  background:var(--accent);
  border:2px solid var(--ink);
  box-shadow:9px 9px 0 var(--ink);
  position:relative; overflow:hidden;
}
.cta-banner::before {
  content:''; position:absolute; inset:0;
  background:repeating-linear-gradient(
    135deg,
    rgba(255,255,255,0.09) 0 18px,
    transparent 18px 36px
  );
  pointer-events:none;
}
.cta-banner h2 {
  color:#fff; font-size:clamp(1.5rem, 3vw, 2.15rem);
  font-weight:900; letter-spacing:-0.03em;
  margin-bottom:14px; position:relative;
}
.cta-banner p {
  position:relative; opacity:0.94;
  max-width:560px; margin:0 auto 30px; line-height:1.8;
}
.cta-banner .btn-primary {
  background:var(--ink); color:var(--paper);
  border-color:var(--ink);
  box-shadow:4px 4px 0 rgba(255,255,255,0.4);
  position:relative;
}
.cta-banner .btn-primary:hover {
  background:#fff; color:var(--accent);
  box-shadow:1px 1px 0 rgba(255,255,255,0.4);
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding:64px 0 28px;
  background:var(--paper-alt);
  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); font-size:0.9rem;
  line-height:1.85; max-width:320px;
}
.footer-col h4 {
  font-size:0.78rem; font-weight:900;
  letter-spacing:0.16em; text-transform:uppercase;
  margin-bottom:18px; color:var(--ink);
}
.footer-col ul { list-style:none; }
.footer-col li { margin-bottom:11px; }
.footer-col a {
  color:var(--ink-soft); text-decoration:none;
  font-size:0.9rem; transition:0.18s; display:inline-block;
}
.footer-col a:hover { color:var(--accent); transform:translateX(4px); }
.footer-bottom {
  border-top:1px solid rgba(20,16,12,0.18);
  margin-top:46px; padding-top:22px;
  text-align:center; font-size:0.82rem;
  color:var(--ink-soft); letter-spacing:0.02em;
}

/* ---------- 工具类 ---------- */
.text-accent { color:var(--accent); }
.text-center { text-align:center; }
.seo-description {
  max-width:600px; margin:0 auto 48px;
  color:var(--ink-soft); line-height:1.85; text-align:center;
}
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  .hero { padding-top:104px; }
  .hero::after { display:none; }
  .feature-block { grid-template-columns:1fr; gap:36px; }
  .stats-bar { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:1fr 1fr; gap:36px; }
  .main-nav { display:none; }
  .menu-toggle { display:flex; }
  .main-nav.open {
    display:flex; flex-direction:column;
    position:absolute; top:68px; left:0; width:100%;
    background:var(--paper); padding:24px;
    border-bottom:2px solid var(--ink);
    gap:18px; align-items:flex-start;
  }
  .main-nav.open a { font-size:1rem; }
  .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; align-items:stretch; }
  .hero-buttons .btn { justify-content:center; }
  .cta-banner { padding:48px 20px; border-radius:16px; }
  .footer-bottom { font-size:0.78rem; }
}