/* ==========================================================================
   黑料社区在线 — 设计系统
   风格：报纸杂志 × 编辑排版 × 柠檬黄/品红/墨绿
   ========================================================================== */

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
  --paper: #fbf7ef;
  --paper-2: #fff9ec;
  --ink: #1a1a1a;
  --ink-soft: #4a4a4a;
  --line: #1a1a1a;
  --lemon: #ffe94d;
  --lemon-deep: #f7d91e;
  --magenta: #ff3d6e;
  --forest: #0f4c3a;
  --sky: #cfe8ff;
  --shadow-hard: 4px 4px 0 #1a1a1a;
  --shadow-soft: 0 20px 40px -20px rgba(26,26,26,0.25);
}

html { scroll-behavior:smooth; }

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  background:
    radial-gradient(circle at 12% 8%, rgba(255,233,77,0.35), transparent 42%),
    radial-gradient(circle at 88% 92%, rgba(255,61,110,0.14), transparent 40%),
    var(--paper);
  color: var(--ink);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* 报纸细纹背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  background-image:
    linear-gradient(rgba(26,26,26,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,26,26,0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  opacity: 0.7;
}

.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: linear-gradient(180deg, rgba(255,249,236,0.9), rgba(207,232,255,0.35));
}

/* 报纸式栏头分隔线 */
.section::after {
  content: '';
  position: absolute;
  left: 24px;
  right: 24px;
  bottom: 0;
  height: 3px;
  background:
    repeating-linear-gradient(90deg, var(--ink) 0 8px, transparent 8px 14px);
  opacity: 0.12;
}

/* ========== 导航 ========== */
.site-header {
  position:fixed;
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  background:rgba(251,247,239,0.92);
  backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid rgba(26,26,26,0.14);
  box-shadow: 0 1px 0 rgba(255,233,77,0.8);
}

.header-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  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:-0.5px;
  text-decoration:none;
  color: var(--ink);
  text-transform: uppercase;
}

.logo-icon {
  width:38px;
  height:38px;
  border-radius:4px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.05rem;
  background: var(--lemon);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--magenta);
  font-weight: 900;
  transition: transform .25s cubic-bezier(.34,1.56,.64,1), box-shadow .25s;
}

.logo:hover .logo-icon {
  transform: translate(-2px,-2px) rotate(-4deg);
  box-shadow: 5px 5px 0 var(--forest);
}

.main-nav {
  display:flex;
  align-items:center;
  gap:6px;
  list-style:none;
}

.main-nav a {
  text-decoration:none;
  font-size:0.88rem;
  font-weight:700;
  color: var(--ink);
  padding: 8px 14px;
  position: relative;
  border-radius: 2px;
  transition: color .2s, background .2s;
  letter-spacing: .3px;
}

.main-nav a::after {
  content:'';
  position:absolute;
  left: 12px;
  right: 12px;
  bottom: 4px;
  height: 2px;
  background: var(--magenta);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s cubic-bezier(.65,.05,.36,1);
}

.main-nav a:hover::after { transform: scaleX(1); }
.main-nav a:hover { color: var(--forest); }

.nav-cta {
  padding:9px 20px !important;
  border-radius: 2px;
  color: var(--ink) !important;
  font-weight: 800 !important;
  background: var(--lemon);
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform .15s, box-shadow .15s, background .2s !important;
}

.nav-cta::after { display: none; }

.nav-cta:hover {
  background: var(--magenta) !important;
  color: #fff !important;
  transform: translate(-2px,-2px);
  box-shadow: 5px 5px 0 var(--ink) !important;
}

.menu-toggle {
  display:none;
  width: 42px;
  height: 42px;
  align-items:center;
  justify-content:center;
  border: 2px solid var(--ink);
  background: var(--lemon);
  border-radius: 2px;
  cursor: pointer;
  font-size: 1.1rem;
  box-shadow: 3px 3px 0 var(--ink);
}

/* ========== Hero ========== */
.hero {
  min-height:88vh;
  display:flex;
  align-items:center;
  padding-top: 120px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '黑料 · 明鉴';
  position: absolute;
  top: 50%;
  right: -80px;
  transform: translateY(-50%) rotate(90deg);
  font-size: 7rem;
  font-weight: 900;
  color: rgba(15,76,58,0.055);
  letter-spacing: 20px;
  white-space: nowrap;
  pointer-events: none;
}

.hero-content {
  max-width:760px;
  position: relative;
  z-index: 3;
}

.hero-eyebrow {
  display:inline-block;
  font-size:0.78rem;
  font-weight: 800;
  padding:6px 16px;
  border-radius: 2px;
  margin-bottom:22px;
  background: var(--forest);
  color: var(--lemon);
  letter-spacing: 4px;
  border: 2px solid var(--ink);
  box-shadow: 3px 3px 0 var(--magenta);
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  line-height: 1.05;
  margin-bottom:26px;
  font-weight: 900;
  letter-spacing: -2px;
  color: var(--ink);
}

.hero h1 mark,
.hero h1 em {
  font-style: normal;
  background: linear-gradient(180deg, transparent 58%, var(--lemon) 58%);
  padding: 0 6px;
  color: var(--ink);
}

.hero p {
  font-size:1.08rem;
  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: 4px;
  overflow:hidden;
  border: 3px solid var(--ink);
  box-shadow: 10px 10px 0 var(--forest);
  transform: rotate(-2deg);
  transition: transform .4s ease, box-shadow .4s ease;
}

.hero-image:hover {
  transform: rotate(0deg) translateY(-6px);
  box-shadow: 14px 14px 0 var(--magenta);
}

.hero-image img { width:100%; height:auto; display:block; }

/* ========== 按钮 ========== */
.btn {
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:14px 30px;
  border-radius: 2px;
  font-weight: 800;
  font-size: 0.92rem;
  letter-spacing: 0.5px;
  cursor:pointer;
  border: 2px solid var(--ink);
  text-decoration:none;
  transition: transform .15s ease, box-shadow .15s ease, background .2s, color .2s;
  position: relative;
}

.btn-primary {
  color: var(--ink);
  background: var(--lemon);
  box-shadow: 4px 4px 0 var(--ink);
}

.btn-primary:hover {
  transform: translate(-3px,-3px);
  box-shadow: 7px 7px 0 var(--ink);
  background: var(--magenta);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 var(--forest);
}

.btn-outline:hover {
  background: var(--forest);
  color: var(--lemon);
  transform: translate(-3px,-3px);
  box-shadow: 7px 7px 0 var(--ink);
}

/* ========== 标题 ========== */
.section-label {
  display:inline-block;
  font-size:0.78rem;
  font-weight: 800;
  letter-spacing: 5px;
  margin-bottom:14px;
  color: var(--magenta);
  padding-left: 34px;
  position: relative;
  text-transform: uppercase;
}

.section-label::before {
  content:'';
  position:absolute;
  left:0;
  top:50%;
  width: 22px;
  height: 3px;
  background: var(--magenta);
  transform: translateY(-50%);
}

.section-title {
  font-size: clamp(1.7rem, 3.6vw, 2.5rem);
  margin-bottom:16px;
  font-weight: 900;
  letter-spacing: -1px;
  line-height: 1.15;
  color: var(--ink);
}

.section-desc {
  max-width:600px;
  color: var(--ink-soft);
  margin-bottom:44px;
  font-size: 1rem;
}

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

.category-card {
  border-radius: 4px;
  padding: 30px 26px;
  border: 2px solid var(--ink);
  background: var(--paper-2);
  transition: transform .25s cubic-bezier(.34,1.56,.64,1), box-shadow .25s;
  position: relative;
  box-shadow: 0 0 0 var(--ink);
}

.category-card::before {
  content:'';
  position:absolute;
  top:0;
  left:0;
  width: 100%;
  height: 6px;
  background: var(--lemon);
  transition: background .25s;
}

.category-card:nth-child(2n)::before { background: var(--magenta); }
.category-card:nth-child(3n)::before { background: var(--forest); }

.category-card:hover {
  transform: translate(-4px,-4px);
  box-shadow: 8px 8px 0 var(--ink);
}

.category-card:hover::before { background: var(--sky); }

.card-icon {
  width:54px;
  height:54px;
  border-radius: 50%;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
  font-size:1.35rem;
  background: var(--lemon);
  border: 2px solid var(--ink);
  color: var(--ink);
}

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.category-card p {
  font-size: 0.92rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
}

.card-link {
  font-weight: 800;
  font-size:0.82rem;
  text-decoration:none;
  color: var(--forest);
  letter-spacing: 1px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s, color .2s;
}

.card-link::after {
  content: '→';
  transition: transform .2s;
}

.card-link:hover { color: var(--magenta); gap: 10px; }
.card-link:hover::after { transform: translateX(4px); }

/* ========== 特性块 ========== */
.feature-block {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap: 64px;
  align-items:center;
}

.feature-image {
  border-radius: 4px;
  overflow:hidden;
  border: 3px solid var(--ink);
  box-shadow: -10px 10px 0 var(--lemon);
  position: relative;
}

.feature-image::after {
  content:'';
  position:absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 60%, rgba(15,76,58,0.12));
  pointer-events: none;
}

.feature-image img { width:100%; height:auto; display:block; }

.feature-text h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 900;
  letter-spacing: -1px;
  margin-bottom: 16px;
  line-height: 1.15;
}

.feature-text > p {
  color: var(--ink-soft);
  margin-bottom: 22px;
}

.feature-list {
  list-style:none;
}

.feature-list li {
  padding: 10px 0;
  display:flex;
  align-items: center;
  gap: 14px;
  font-weight: 600;
  border-bottom: 1px dashed rgba(26,26,26,0.18);
  font-size: 0.95rem;
}

.feature-list li::before {
  content:'✓';
  font-weight: 900;
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--forest);
  color: var(--lemon);
  border-radius: 50%;
  font-size: 0.75rem;
}

/* ========== 数据条 ========== */
.stats-bar {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap: 22px;
  text-align:center;
}

.stat-item {
  padding: 30px 20px;
  border-radius: 4px;
  border: 2px solid var(--ink);
  background: var(--paper-2);
  position: relative;
  transition: transform .25s, box-shadow .25s;
  box-shadow: 0 0 0 var(--ink);
}

.stat-item:nth-child(1) { background: var(--lemon); }
.stat-item:nth-child(2) { background: var(--sky); }
.stat-item:nth-child(3) { background: #ffd9e4; }
.stat-item:nth-child(4) { background: #d4ecdf; }

.stat-item:hover {
  transform: translate(-4px,-4px);
  box-shadow: 7px 7px 0 var(--ink);
}

.stat-number {
  font-size: clamp(1.9rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1;
  color: var(--ink);
}

.stat-number::before { content: ''; }

.stat-label {
  font-size: 0.84rem;
  color: var(--ink);
  opacity: 0.75;
  margin-top: 10px;
  font-weight: 700;
  letter-spacing: 1px;
}

/* ========== 内容墙 ========== */
.content-wall {
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
  gap: 26px;
}

.content-wall-item {
  border-radius: 4px;
  overflow:hidden;
  border: 2px solid var(--ink);
  background: var(--paper-2);
  transition: transform .25s, box-shadow .25s;
  box-shadow: 0 0 0 var(--ink);
}

.content-wall-item:hover {
  transform: translate(-4px,-4px);
  box-shadow: 9px 9px 0 var(--magenta);
}

.content-wall-item img {
  width:100%;
  height:200px;
  object-fit:cover;
  display: block;
  border-bottom: 2px solid var(--ink);
  filter: saturate(1.1) contrast(1.02);
}

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

.content-wall-body h3 {
  font-size: 1.05rem;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.3px;
}

.content-wall-body p {
  font-size: 0.88rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ========== FAQ ========== */
.faq-list {
  max-width:820px;
  margin:0 auto;
}

.faq-item {
  border: 2px solid var(--ink);
  border-radius: 2px;
  margin-bottom: 10px;
  overflow:hidden;
  cursor:pointer;
  background: var(--paper-2);
  transition: box-shadow .25s, transform .25s;
}

.faq-item:hover {
  box-shadow: 5px 5px 0 var(--lemon);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 800;
  display:flex;
  justify-content:space-between;
  align-items: center;
  gap: 16px;
  font-size: 1rem;
  letter-spacing: -0.2px;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--magenta);
  transition: transform .3s;
  line-height: 1;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
  color: var(--forest);
}

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display:none;
  color: var(--ink-soft);
  line-height: 1.8;
  font-size: 0.94rem;
}

.faq-item.open {
  box-shadow: 6px 6px 0 var(--forest);
  background: #fdfaee;
}

.faq-item.open .faq-answer { display:block; }

/* ========== CTA 横幅 ========== */
.cta-banner {
  padding: 72px 40px;
  text-align:center;
  border-radius: 4px;
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 20%, rgba(255,233,77,0.9), transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255,61,110,0.35), transparent 55%),
    var(--forest);
  border: 3px solid var(--ink);
  position: relative;
  overflow: hidden;
  box-shadow: 10px 10px 0 var(--lemon);
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 10px;
  border: 2px dashed rgba(251,247,239,0.4);
  border-radius: 2px;
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 900;
  letter-spacing: -1px;
  margin-bottom: 14px;
  position: relative;
  z-index: 2;
  text-shadow: 2px 2px 0 rgba(26,26,26,0.3);
}

.cta-banner p {
  color: rgba(255,255,255,0.85);
  max-width: 520px;
  margin: 0 auto 30px;
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary {
  background: var(--lemon);
  color: var(--ink);
  box-shadow: 4px 4px 0 var(--ink);
  position: relative;
  z-index: 2;
}

.cta-banner .btn-primary:hover {
  background: var(--magenta);
  color: #fff;
  transform: translate(-3px,-3px);
  box-shadow: 7px 7px 0 #1a1a1a;
}

/* ========== 页脚 ========== */
.site-footer {
  padding: 72px 0 28px;
  background: var(--forest);
  color: #e8f0e9;
  position: relative;
  border-top: 3px solid var(--ink);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 8px;
  background: repeating-linear-gradient(90deg,
    var(--lemon) 0 40px,
    var(--magenta) 40px 80px,
    var(--sky) 80px 120px);
}

.site-footer .container { position: relative; }

.footer-grid {
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap: 44px;
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 18px;
}

.footer-brand .logo-icon {
  background: var(--lemon);
  border-color: var(--lemon);
  box-shadow: 3px 3px 0 var(--magenta);
}

.footer-brand p {
  font-size: 0.88rem;
  color: rgba(232,240,233,0.72);
  max-width: 320px;
  line-height: 1.8;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 18px;
  color: var(--lemon);
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 2px;
  background: var(--magenta);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li { margin-bottom: 10px; }

.footer-col ul a {
  font-size: 0.88rem;
  color: rgba(232,240,233,0.78);
  text-decoration: none;
  transition: color .2s, padding-left .25s;
  position: relative;
  display: inline-block;
}

.footer-col ul a::before {
  content: '→';
  position: absolute;
  left: -18px;
  opacity: 0;
  transition: opacity .2s, transform .25s;
  color: var(--lemon);
}

.footer-col ul a:hover {
  color: var(--lemon);
  padding-left: 6px;
}

.footer-col ul a:hover::before { opacity: 1; }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.16);
  margin-top: 48px;
  padding-top: 24px;
  text-align:center;
  font-size:0.82rem;
  color: rgba(232,240,233,0.6);
  letter-spacing: 0.5px;
}

/* ========== 工具类 ========== */
.text-accent {
  color: var(--magenta);
  font-weight: 800;
}

.text-center { text-align: center; }

.text-center .section-desc { margin-left: auto; margin-right: auto; }

.seo-description {
  max-width:600px;
  margin: 0 auto 48px;
  color: var(--ink-soft);
  font-size: 1rem;
  line-height: 1.8;
}

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

/* ========== 响应式 ========== */
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .feature-block { gap: 40px; }
}

@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;
  }

  .main-nav.open {
    display:flex;
    flex-direction:column;
    align-items: stretch;
    position:absolute;
    top:72px;
    left:0;
    width:100%;
    background: var(--paper);
    padding:18px 24px 26px;
    gap: 6px;
    border-bottom: 3px solid var(--ink);
    box-shadow: 0 14px 30px -12px rgba(26,26,26,0.3);
    z-index: 999;
  }

  .main-nav.open li { width: 100%; }
  .main-nav.open a { display: block; padding: 12px 4px; border-bottom: 1px dashed rgba(26,26,26,0.15); }
  .main-nav.open a::after { display: none; }
  .main-nav.open .nav-cta { margin-top: 10px; border-bottom: none; text-align: center; }

  .hero { padding-top: 110px; min-height: 70vh; }
  .hero::before { display: none; }
  .cta-banner { padding: 56px 26px; }
  .section { padding: 64px 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 { width: 100%; justify-content: center; }
  .hero h1 { letter-spacing: -1px; }
  .section-title { letter-spacing: -0.5px; }
}