/* ============================================================
   黑料网页版 — Design System
   Style: "Paper Brutal" — 暖纸底 + 硬阴影 + 荧光撞色排版
   ============================================================ */

:root{
  --paper:#FFFAF3;
  --paper-2:#F3F0FA;
  --paper-3:#FFF2E2;
  --ink:#1B1A17;
  --ink-soft:rgba(27,26,23,.62);
  --violet:#6C4CF1;
  --coral:#FF6A4D;
  --lime:#C9F24D;
  --mint:#8FE3C8;
  --sky:#9AD9F0;
  --line:1.6px solid var(--ink);
  --hard:6px 6px 0 var(--ink);
  --hard-sm:4px 4px 0 var(--ink);
  --hard-lg:10px 10px 0 var(--ink);
  --radius:18px;
  --radius-sm:12px;
}

/* ------------------ 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:var(--paper);
  color:var(--ink);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  background-image:radial-gradient(rgba(27,26,23,.055) 1px, transparent 1px);
  background-size:26px 26px;
}

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

img{ max-width:100%; display:block; }
a{ color:inherit; }
h1,h2,h3,h4{ line-height:1.12; letter-spacing:-.02em; font-weight:900; }

/* ------------------ 核心布局 ------------------ */
.container { max-width:1200px; margin:0 auto; padding:0 24px; position:relative; z-index:2; }
.section { padding:80px 0; position:relative; }
.section:nth-child(even) { background:var(--paper-2); }

.section::before{
  content:"";
  position:absolute; inset:auto 0 0 0; height:1px;
  background:repeating-linear-gradient(90deg, var(--ink) 0 10px, transparent 10px 20px);
  opacity:.18;
}

/* ------------------ 导航 ------------------ */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background:rgba(255,250,243,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1.6px 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; text-decoration:none; color:var(--ink);
  letter-spacing:-.03em;
}
.logo-icon {
  width:36px; height:36px; border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  font-size:1rem; font-weight:900;
  background:var(--lime); color:var(--ink);
  border:1.6px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-4deg);
  transition:.25s cubic-bezier(.34,1.56,.64,1);
}
.logo:hover .logo-icon{ transform:rotate(6deg) scale(1.06); }

.main-nav { display:flex; align-items:center; gap:4px; list-style:none; }
.main-nav a {
  text-decoration:none; font-size:.9rem; font-weight:600;
  color:var(--ink); transition:.2s; position:relative;
  padding:8px 12px; border-radius:10px;
}
.main-nav a::after{
  content:""; position:absolute; left:12px; right:12px; bottom:4px; height:3px;
  background:var(--lime); border-radius:2px;
  transform:scaleX(0); transform-origin:left; transition:transform .28s cubic-bezier(.34,1.56,.64,1);
}
.main-nav a:hover::after{ transform:scaleX(1); }
.main-nav a:hover{ color:var(--violet); }

.nav-cta {
  padding:9px 20px !important; border-radius:12px;
  color:var(--ink) !important; font-weight:800 !important;
  background:var(--coral);
  border:1.6px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transition:.18s;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{
  transform:translate(-1px,-1px);
  box-shadow:5px 5px 0 var(--ink);
  color:var(--ink) !important;
}
.menu-toggle {
  display:none; width:42px; height:42px; align-items:center; justify-content:center;
  background:var(--paper); border:1.6px solid var(--ink); border-radius:12px;
  box-shadow:3px 3px 0 var(--ink); cursor:pointer; font-size:1.1rem; color:var(--ink);
}

/* ------------------ Hero ------------------ */
.hero {
  min-height:70vh; display:flex; align-items:center;
  padding:140px 0 90px; position:relative; overflow:hidden;
}
.hero::before{
  content:""; position:absolute; width:520px; height:520px; border-radius:50%;
  background:radial-gradient(circle at 30% 30%, var(--lime), transparent 68%);
  top:-140px; right:-120px; filter:blur(10px); opacity:.85; z-index:1;
}
.hero::after{
  content:""; position:absolute; width:380px; height:380px; border-radius:50%;
  background:radial-gradient(circle at 60% 60%, var(--sky), transparent 70%);
  bottom:-160px; left:-120px; opacity:.7; z-index:1;
}
.hero-content { max-width:720px; position:relative; z-index:3; }
.hero-eyebrow {
  display:inline-block; font-size:.82rem; font-weight:800;
  padding:6px 16px; border-radius:999px; margin-bottom:20px;
  letter-spacing:.12em; text-transform:uppercase;
  background:var(--paper); color:var(--ink);
  border:1.6px solid var(--ink); box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-1.5deg);
}
.hero h1 {
  font-size:clamp(2.4rem, 6.2vw, 4.4rem);
  line-height:1.02; margin-bottom:22px; letter-spacing:-.045em;
  font-weight:900;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(180deg, transparent 58%, var(--lime) 58%, var(--lime) 92%, transparent 92%);
  padding:0 .06em;
}
.hero p {
  font-size:1.08rem; opacity:.72; max-width:560px; margin-bottom:34px;
  font-weight:500;
}
.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; }
.hero-image {
  border-radius:var(--radius); overflow:hidden;
  border:1.6px solid var(--ink); box-shadow:var(--hard-lg);
  background:var(--paper);
}
.hero-image img { width:100%; height:auto; }

/* ------------------ 按钮 ------------------ */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 28px; border-radius:14px;
  font-weight:800; font-size:.95rem; cursor:pointer;
  border:1.6px solid var(--ink); text-decoration:none;
  transition:.18s cubic-bezier(.34,1.56,.64,1);
  box-shadow:var(--hard-sm); position:relative;
}
.btn:hover{ transform:translate(-2px,-2px); box-shadow:7px 7px 0 var(--ink); }
.btn:active{ transform:translate(2px,2px); box-shadow:2px 2px 0 var(--ink); }
.btn-primary { color:var(--ink); background:var(--violet); color:#fff; }
.btn-primary:hover{ background:var(--violet); }
.btn-outline { background:var(--paper); color:var(--ink); }
.btn-outline:hover{ background:var(--lime); }

/* ------------------ 标签 / 标题 ------------------ */
.section-label {
  display:inline-block; font-size:.76rem; font-weight:900;
  letter-spacing:.22em; margin-bottom:14px; text-transform:uppercase;
  color:var(--ink); padding:5px 14px; border-radius:999px;
  background:var(--lime); border:1.6px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink); transform:rotate(-1deg);
}
.section-title {
  font-size:clamp(1.7rem, 3.6vw, 2.5rem); margin-bottom:16px;
  letter-spacing:-.035em; font-weight:900;
}
.section-desc { max-width:600px; opacity:.7; margin-bottom:44px; 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:var(--radius); padding:28px;
  border:1.6px solid var(--ink); background:var(--paper);
  transition:.22s cubic-bezier(.34,1.56,.64,1);
  box-shadow:var(--hard-sm); position:relative; overflow:hidden;
}
.category-card::after{
  content:""; position:absolute; top:-40px; right:-40px;
  width:90px; height:90px; border-radius:50%;
  background:var(--mint); opacity:0; transition:.3s;
}
.category-card:hover { transform:translate(-3px,-3px); box-shadow:9px 9px 0 var(--ink); }
.category-card:hover::after{ opacity:.55; }
.category-card:nth-child(3n+1)::after{ background:var(--lime); }
.category-card:nth-child(3n+2)::after{ background:var(--sky); }
.category-card h3{ font-size:1.14rem; margin-bottom:8px; position:relative; z-index:2; }
.category-card p{ font-size:.92rem; opacity:.68; position:relative; z-index:2; }

.card-icon {
  width:50px; height:50px; border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.35rem;
  border:1.6px solid var(--ink); box-shadow:3px 3px 0 var(--ink);
  background:var(--lime); position:relative; z-index:2;
  transition:.25s cubic-bezier(.34,1.56,.64,1);
}
.category-card:nth-child(4n+1) .card-icon{ background:var(--lime); }
.category-card:nth-child(4n+2) .card-icon{ background:var(--coral); }
.category-card:nth-child(4n+3) .card-icon{ background:var(--sky); }
.category-card:nth-child(4n+4) .card-icon{ background:var(--mint); }
.category-card:hover .card-icon{ transform:rotate(-8deg) scale(1.08); }

.card-link {
  font-weight:800; font-size:.85rem; text-decoration:none;
  color:var(--violet); display:inline-block; margin-top:16px;
  position:relative; z-index:2;
  border-bottom:2px solid transparent; transition:.2s;
}
.card-link:hover{ border-bottom-color:var(--violet); letter-spacing:.02em; }

/* ------------------ 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:1.6px solid var(--ink); box-shadow:var(--hard-lg);
  background:var(--paper); position:relative;
}
.feature-image img { width:100%; height:auto; }
.feature-text h2{ font-size:clamp(1.6rem,3.2vw,2.2rem); margin-bottom:16px; }
.feature-text p{ opacity:.72; margin-bottom:20px; }
.feature-list { list-style:none; }
.feature-list li {
  padding:9px 0; display:flex; align-items:center; gap:12px;
  font-weight:600; font-size:.98rem;
  border-bottom:1px dashed rgba(27,26,23,.22);
}
.feature-list li:last-child{ border-bottom:none; }
.feature-list li::before {
  content:'✓'; font-weight:900;
  width:26px; height:26px; flex:0 0 26px;
  display:inline-flex; align-items:center; justify-content:center;
  border-radius:8px; font-size:.78rem;
  background:var(--lime); color:var(--ink);
  border:1.6px solid var(--ink);
}

/* ------------------ 数据条 ------------------ */
.stats-bar { display:grid; grid-template-columns:repeat(4,1fr); gap:24px; text-align:center; }
.stat-item {
  padding:28px 22px; border-radius:var(--radius);
  border:1.6px solid var(--ink); background:var(--paper);
  box-shadow:var(--hard-sm); transition:.22s cubic-bezier(.34,1.56,.64,1);
}
.stat-item:hover{ transform:translateY(-5px) rotate(-1deg); box-shadow:9px 9px 0 var(--ink); }
.stat-item:nth-child(4n+1){ background:var(--lime); }
.stat-item:nth-child(4n+2){ background:#FFF0EC; }
.stat-item:nth-child(4n+3){ background:#EAF3FE; }
.stat-item:nth-child(4n+4){ background:#EAFBF4; }
.stat-number {
  font-size:clamp(1.9rem,4vw,2.6rem); font-weight:900;
  letter-spacing:-.04em; line-height:1;
}
.stat-label { font-size:.88rem; opacity:.62; 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:1.6px solid var(--ink); background:var(--paper);
  transition:.22s cubic-bezier(.34,1.56,.64,1);
  box-shadow:var(--hard-sm); display:flex; flex-direction:column;
}
.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;
  border-bottom:1.6px solid var(--ink);
  transition:.4s; filter:saturate(1.05);
}
.content-wall-item:hover img{ transform:scale(1.04); }
.content-wall-body { padding:20px; }
.content-wall-body h3{ font-size:1.05rem; margin-bottom:8px; }
.content-wall-body p{ font-size:.9rem; opacity:.68; }

/* ------------------ FAQ ------------------ */
.faq-list { max-width:800px; margin:0 auto; }
.faq-item {
  border:1.6px solid var(--ink); border-radius:14px;
  margin-bottom:12px; overflow:hidden; cursor:pointer;
  background:var(--paper); box-shadow:var(--hard-sm);
  transition:.2s;
}
.faq-item:hover{ transform:translate(-2px,-2px); box-shadow:6px 6px 0 var(--ink); }
.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:1.4rem; font-weight:900; line-height:1;
  width:28px; height:28px; flex:0 0 28px;
  display:flex; align-items:center; justify-content:center;
  border-radius:9px; background:var(--lime);
  border:1.6px solid var(--ink); transition:.25s;
}
.faq-item.open .faq-question::after{ content:"–"; transform:rotate(180deg); background:var(--coral); }
.faq-item .faq-answer { padding:0 22px 18px; display:none; opacity:.72; font-size:.94rem; }
.faq-item.open { background:#FFFDF5; box-shadow:8px 8px 0 var(--ink); }
.faq-item.open .faq-answer { display:block; }

/* ------------------ CTA横幅 ------------------ */
.cta-banner {
  padding:60px 28px; text-align:center; border-radius:22px;
  color:var(--ink);
  background:linear-gradient(120deg, var(--lime) 0%, var(--mint) 55%, var(--sky) 100%);
  border:1.6px solid var(--ink);
  box-shadow:var(--hard-lg);
  position:relative; overflow:hidden;
}
.cta-banner::before{
  content:""; position:absolute; inset:0;
  background-image:radial-gradient(rgba(27,26,23,.09) 1.4px, transparent 1.4px);
  background-size:18px 18px; pointer-events:none;
}
.cta-banner h2 {
  color:var(--ink); font-size:clamp(1.7rem,3.6vw,2.4rem);
  margin-bottom:14px; position:relative; z-index:2; letter-spacing:-.035em;
}
.cta-banner p{ position:relative; z-index:2; opacity:.75; margin-bottom:28px; }
.cta-banner .btn-primary {
  background:var(--ink); color:var(--paper);
  border-color:var(--ink); box-shadow:4px 4px 0 rgba(27,26,23,.35);
  position:relative; z-index:2;
}
.cta-banner .btn-primary:hover{ box-shadow:7px 7px 0 rgba(27,26,23,.35); }

/* ------------------ 页脚 ------------------ */
.site-footer {
  padding:64px 0 28px;
  background:var(--paper-3);
  border-top:1.6px solid var(--ink);
  position:relative;
}
.site-footer .container { }
.footer-grid { display:grid; grid-template-columns:2fr 1fr 1fr 1fr; gap:40px; }
.footer-brand { }
.footer-brand .logo{ margin-bottom:16px; }
.footer-brand p{ font-size:.92rem; opacity:.66; max-width:320px; }
.footer-col { }
.footer-col h4{
  font-size:.8rem; font-weight:900; letter-spacing:.16em;
  text-transform:uppercase; margin-bottom:16px;
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:9px; }
.footer-col a{
  text-decoration:none; font-size:.92rem; opacity:.68;
  transition:.2s; border-bottom:2px solid transparent;
}
.footer-col a:hover{ opacity:1; color:var(--violet); border-bottom-color:var(--lime); }
.footer-bottom {
  border-top:1.6px dashed rgba(27,26,23,.28);
  margin-top:44px; padding-top:22px; text-align:center;
  font-size:.85rem; opacity:.6; font-weight:600;
}

/* ------------------ 工具类 ------------------ */
.text-accent { color:var(--violet); }
.text-center { text-align:center; }
.seo-description { max-width:600px; margin:0 auto 48px; opacity:.7; }
.mt-0 { margin-top:0; }
.mb-0 { margin-bottom:0; }
.text-center .section-desc,
.text-center .seo-description{ margin-left:auto; margin-right:auto; }

/* ------------------ 响应式 ------------------ */
@media (max-width: 900px){
  .feature-block { gap:36px; }
  .footer-grid { gap:28px; }
}

@media (max-width: 768px) {
  .section{ padding:60px 0; }
  .hero{ padding:120px 0 70px; }
  .feature-block { grid-template-columns:1fr; }
  .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;
    position:absolute; top:68px; left:0; width:100%;
    background:var(--paper); padding:20px 24px 26px; gap:6px;
    border-bottom:1.6px solid var(--ink);
    box-shadow:0 10px 0 rgba(27,26,23,.12);
  }
  .main-nav.open li{ width:100%; }
  .main-nav.open a{ display:block; padding:12px 8px; font-size:1rem; }
  .main-nav.open .nav-cta{ display:inline-flex; margin-top:10px; }
}

@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; }
  .section-label{ font-size:.7rem; letter-spacing:.16em; }
  .cta-banner{ padding:44px 20px; }
  :root{ --hard:5px 5px 0 var(--ink); --hard-lg:7px 7px 0 var(--ink); }
}