/* ============================================================
   黑料社区在线 · 1112321031.net
   设计语言：RISO 编辑部 / 纸感杂志风
   配色：米纸白 + 墨蓝 + 朱砂橙 + 提花青
   ============================================================ */

:root{
  --paper:      #FBF6EC;
  --paper-2:    #F1E8D8;
  --paper-3:    #E7DAC4;
  --ink:        #14142B;
  --ink-soft:   #55557A;
  --ink-fade:   #8E8CAE;
  --coral:      #FF4B21;
  --coral-soft: #FFE2D6;
  --teal:       #0FA98A;
  --teal-soft:  #D5F3EB;
  --lilac:      #C7B8FF;
  --line:       2px solid var(--ink);
  --shadow-hard: 5px 5px 0 rgba(20,20,43,.09);
  --shadow-pop:  8px 8px 0 var(--coral);
  --radius: 3px;
}

/* ---------------- 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;
  background-color: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.7;
  letter-spacing: .01em;
  background-image:
    radial-gradient(rgba(20,20,43,.055) 1px, transparent 1px);
  background-size: 22px 22px;
}

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

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: var(--paper-2);
  border-top: var(--line);
  border-bottom: var(--line);
}

/* 章节编号肌理：左上角细斜线 */
.section::before{
  content:"";
  position:absolute; top:0; left:0;
  width:100%; height:6px;
  background: repeating-linear-gradient(
    90deg,
    var(--ink) 0 10px,
    transparent 10px 20px
  );
  opacity:.08;
  pointer-events:none;
}

/* ---------------- 导航 ---------------- */
.site-header {
  position:fixed; top:0; left:0; width:100%; z-index:1000;
  background: rgba(251,246,236,.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: var(--line);
}
.site-header::before{
  content:"";
  position:absolute; top:0; left:0; width:100%; height:5px;
  background: var(--coral);
}

.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:-.02em;
}
.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(--coral); color:#fff;
  border: var(--line);
  box-shadow: 3px 3px 0 var(--ink);
  transform: rotate(-4deg);
  transition: transform .25s ease;
}
.logo:hover .logo-icon{ transform: rotate(4deg) scale(1.05); }

.main-nav { display:flex; align-items:center; gap:24px; list-style:none; }

.main-nav a {
  text-decoration:none; font-size:.9rem; font-weight:600;
  transition:.2s; color: var(--ink-soft);
  position:relative; padding:4px 0;
}
.main-nav a::after{
  content:"";
  position:absolute; left:0; bottom:0;
  width:0; height:3px; background: var(--coral);
  transition: width .28s cubic-bezier(.65,0,.35,1);
}
.main-nav a:hover{ color: var(--ink); }
.main-nav a:hover::after{ width:100%; }

.nav-cta {
  padding:8px 20px; border-radius: var(--radius);
  color:#fff !important; font-weight:700;
  background: var(--ink);
  border: var(--line);
  box-shadow: 3px 3px 0 var(--coral);
  transition: .18s ease;
}
.nav-cta::after{ display:none; }
.nav-cta:hover{
  transform: translate(-2px,-2px);
  box-shadow: 6px 6px 0 var(--coral);
  background: var(--coral);
}

.menu-toggle {
  display:none;
  background: var(--paper); border: var(--line);
  width:42px; height:38px; border-radius: var(--radius);
  align-items:center; justify-content:center;
  font-size:1.1rem; cursor:pointer; color: var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
}

/* ---------------- 首页 Hero ---------------- */
.hero {
  min-height:70vh; display:flex; align-items:center;
  padding: 150px 0 90px;
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(circle at 88% 18%, var(--coral-soft) 0%, transparent 46%),
    radial-gradient(circle at 6% 92%, var(--teal-soft) 0%, transparent 42%),
    var(--paper);
  border-bottom: var(--line);
}
.hero::after{
  content:"";
  position:absolute; right:-60px; top:40px;
  width:320px; height:320px;
  border: var(--line);
  border-radius:50%;
  opacity:.14;
  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:999px; margin-bottom:20px;
  background: var(--paper);
  border: var(--line);
  box-shadow: 3px 3px 0 var(--teal);
  letter-spacing:.06em;
  color: var(--ink);
}

.hero h1 {
  font-size: clamp(2.2rem, 5.2vw, 3.9rem);
  line-height:1.14; margin-bottom:22px;
  font-weight:900; letter-spacing:-.035em;
}
.hero h1 strong,
.hero h1 em{
  font-style:normal;
  background: linear-gradient(transparent 62%, var(--coral) 62% 92%, transparent 92%);
  padding:0 .08em;
}

.hero p {
  font-size:1.08rem; opacity:.72;
  max-width:560px; margin-bottom:34px;
  color: var(--ink-soft);
}

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

.hero-image {
  border-radius: var(--radius); overflow:hidden;
  border: var(--line);
  box-shadow: 10px 10px 0 var(--lilac);
}
.hero-image img { width:100%; height:auto; }

/* ---------------- 按钮 ---------------- */
.btn {
  display:inline-flex; align-items:center; gap:8px;
  padding:13px 30px; border-radius: var(--radius);
  font-weight:700; cursor:pointer; border: var(--line);
  text-decoration:none; transition:.18s cubic-bezier(.65,0,.35,1);
  font-size:.95rem; letter-spacing:.02em;
  box-shadow: 4px 4px 0 var(--ink);
}
.btn:hover{ transform: translate(-2px,-2px); box-shadow: 7px 7px 0 var(--ink); }
.btn:active{ transform: translate(2px,2px); box-shadow: 1px 1px 0 var(--ink); }

.btn-primary { color:#fff; background: var(--coral); }
.btn-primary:hover{ box-shadow: 7px 7px 0 var(--ink); }

.btn-outline {
  background: var(--paper); border: var(--line);
  color: var(--ink);
}
.btn-outline:hover{ background: var(--teal); color:#fff; }

/* ---------------- 标签 / 标题 ---------------- */
.section-label {
  display:inline-block; font-size:.78rem; font-weight:800;
  letter-spacing:.24em; margin-bottom:14px;
  color: var(--paper);
  background: var(--ink);
  padding:4px 12px;
  border-radius: var(--radius);
  text-transform:uppercase;
}
.section-label::before{ content:"◤ "; color: var(--coral); }

.section-title {
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  margin-bottom:16px; font-weight:900;
  letter-spacing:-.03em; line-height:1.22;
}
.section-title::after{
  content:"";
  display:block; width:64px; height:6px;
  margin-top:16px;
  background: var(--coral);
}

.section-desc {
  max-width:600px; opacity:.72; margin-bottom:44px;
  color: var(--ink-soft); font-size:1.02rem;
}

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

.category-card {
  border-radius: var(--radius); padding:30px 28px;
  border: var(--line);
  background: var(--paper);
  transition:.22s cubic-bezier(.65,0,.35,1);
  position:relative;
  box-shadow: var(--shadow-hard);
}
.category-card::after{
  content:"";
  position:absolute; right:14px; top:14px;
  width:10px; height:10px; border-radius:50%;
  background: var(--paper-3);
  transition:.22s;
}
.category-card:hover {
  transform: translate(-4px,-4px);
  box-shadow: var(--shadow-pop);
  background: var(--paper);
}
.category-card:hover::after{ background: var(--coral); }
.category-card:hover .card-link{ color: var(--coral); }

.card-icon {
  width:48px; height:48px; border-radius: var(--radius);
  display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; font-size:1.3rem;
  background: var(--teal-soft);
  border: var(--line);
  color: var(--ink);
}
.category-card:nth-child(3n+2) .card-icon{ background: var(--coral-soft); }
.category-card:nth-child(3n) .card-icon{ background: var(--paper-3); }

.card-link {
  font-weight:800; font-size:.85rem; text-decoration:none;
  color: var(--ink); transition:.2s; letter-spacing:.04em;
}
.card-link::after{ content:" →"; }

/* ---------------- 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(--line);
  box-shadow: 10px 10px 0 var(--teal);
}
.feature-image img { width:100%; height:auto; }

.feature-text { }

.feature-list { list-style:none; margin-top:22px; }
.feature-list li {
  padding:9px 0; display:flex; align-items:flex-start; gap:10px;
  border-bottom:1px dashed rgba(20,20,43,.18);
  color: var(--ink-soft); font-weight:500;
}
.feature-list li:last-child{ border-bottom:none; }
.feature-list li::before {
  content:'✓';
  font-weight:900; color:#fff;
  background: var(--teal);
  width:20px; height:20px; min-width:20px;
  border-radius:50%;
  display:inline-flex; align-items:center; justify-content:center;
  font-size:.72rem; margin-top:5px;
}

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

.stat-item {
  padding:30px 20px; border-radius: var(--radius);
  border: var(--line);
  background: var(--paper);
  transition:.2s ease;
  box-shadow: var(--shadow-hard);
}
.stat-item:hover{ transform: translateY(-4px); box-shadow: 6px 10px 0 rgba(20,20,43,.12); }

.stat-number {
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  font-weight:900; letter-spacing:-.04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.stat-item:nth-child(1) .stat-number{ color: var(--coral); }
.stat-item:nth-child(2) .stat-number{ color: var(--teal); }
.stat-item:nth-child(3) .stat-number{ color: var(--ink); }
.stat-item:nth-child(4) .stat-number{ color: var(--coral); }

.stat-label {
  font-size:.88rem; opacity:.62; margin-top:8px;
  color: var(--ink-soft); 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: var(--radius); overflow:hidden;
  border: var(--line);
  background: var(--paper);
  transition:.22s cubic-bezier(.65,0,.35,1);
  box-shadow: var(--shadow-hard);
}
.content-wall-item:hover {
  transform: translate(-4px,-4px);
  box-shadow: var(--shadow-pop);
}
.content-wall-item img {
  width:100%; height:200px; object-fit:cover;
  border-bottom: var(--line);
  filter: saturate(1.06) contrast(1.03);
  transition: transform .4s ease;
}
.content-wall-item:hover img{ transform: scale(1.04); }

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

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

.faq-item {
  border: var(--line); border-radius: var(--radius);
  margin-bottom:12px; overflow:hidden; cursor:pointer;
  background: var(--paper);
  transition:.2s ease;
  box-shadow: 4px 4px 0 rgba(20,20,43,.08);
}
.faq-item:hover{ background:#fff; }

.faq-item .faq-question {
  padding:18px 22px; font-weight:800;
  display:flex; justify-content:space-between; align-items:center;
  gap:16px; font-size:1rem; letter-spacing:-.01em;
}
.faq-item .faq-question::after{
  content:"+";
  font-weight:900; font-size:1.25rem;
  color: var(--coral);
  line-height:1;
  transition: transform .25s ease;
}
.faq-item.open .faq-question::after{ content:"–"; }

.faq-item .faq-answer {
  padding:0 22px 18px; display:none; opacity:.72;
  color: var(--ink-soft);
  border-top:1px dashed rgba(20,20,43,.2);
  padding-top:14px;
  margin:0 22px 18px;
  padding-left:0; padding-right:0;
}
.faq-item.open .faq-answer { display:block; }
.faq-item.open{ box-shadow: 6px 6px 0 var(--teal); }

/* ---------------- CTA 横幅 ---------------- */
.cta-banner {
  padding:60px 32px; text-align:center;
  border-radius: var(--radius); color: var(--ink);
  background:
    repeating-linear-gradient(
      -45deg,
      rgba(255,255,255,.16) 0 14px,
      transparent 14px 28px
    ),
    var(--coral);
  border: var(--line);
  box-shadow: 12px 12px 0 var(--ink);
}
.cta-banner h2 {
  color: var(--ink);
  font-size: clamp(1.6rem, 3.6vw, 2.3rem);
  font-weight:900; letter-spacing:-.035em;
  margin-bottom:14px;
}
.cta-banner p{ color: rgba(20,20,43,.78); margin-bottom:28px; font-weight:500; }
.cta-banner .btn-primary {
  background: var(--ink); color: var(--paper);
  border: var(--line);
  box-shadow: 4px 4px 0 var(--paper);
}
.cta-banner .btn-primary:hover{ box-shadow: 8px 8px 0 var(--paper); }

/* ---------------- 页脚 ---------------- */
.site-footer {
  padding:56px 0 28px;
  background: var(--paper-2);
  border-top: var(--line);
  position:relative;
}
.site-footer::before{
  content:"";
  position:absolute; top:-2px; left:0;
  width:100%; height:6px;
  background: repeating-linear-gradient(
    90deg, var(--teal) 0 22px,
    var(--lilac) 22px 44px,
    var(--coral) 44px 66px
  );
  opacity:.55;
}
.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{ color: var(--ink-soft); font-size:.92rem; max-width:340px; }

.footer-col { }
.footer-col h4{
  font-size:.85rem; font-weight:800; letter-spacing:.16em;
  margin-bottom:16px; text-transform:uppercase;
  color: var(--ink);
}
.footer-col ul{ list-style:none; }
.footer-col li{ margin-bottom:9px; }
.footer-col a{
  text-decoration:none; color: var(--ink-soft);
  font-size:.9rem; transition:.2s;
  border-bottom:1px solid transparent;
}
.footer-col a:hover{ color: var(--coral); border-bottom-color: var(--coral); }

.footer-bottom {
  border-top: 1px solid rgba(20,20,43,.16);
  margin-top:44px; padding-top:20px;
  text-align:center; font-size:.85rem;
  color: var(--ink-soft);
}

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

.seo-description {
  max-width:600px; margin:0 auto 48px; opacity:.72;
  color: var(--ink-soft);
}
.seo-description.centered, .text-center .seo-description{ margin-left:auto; margin-right:auto; }

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

/* 滚动条 */
::-webkit-scrollbar{ width:11px; }
::-webkit-scrollbar-track{ background: var(--paper-2); }
::-webkit-scrollbar-thumb{
  background: var(--ink);
  border:3px solid var(--paper-2);
  border-radius:8px;
}

/* ⚠️ 响应式 */
@media (max-width: 768px) {
  .feature-block { grid-template-columns:1fr; gap:34px; }
  .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; position:absolute;
    top:68px; left:0; width:100%;
    background: var(--paper);
    padding:20px;
    border-bottom: var(--line);
    gap:16px;
    box-shadow: 0 12px 0 rgba(20,20,43,.06);
  }
  .hero{ padding-top:120px; }
  .section{ padding:60px 0; }
  .section-title::after{ width:48px; height:5px; }
}

@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; }
  .btn{ box-shadow:3px 3px 0 var(--ink); }
  .cta-banner{ padding:44px 20px; box-shadow:7px 7px 0 var(--ink); }
  .faq-item .faq-question{ font-size:.94rem; padding:16px; }
}