/* ==========================================================================
   网爆黑料 · 舆情排雷 —— "Signal Paper" Design System
   Palette : 米白纸感 / 珊瑚红 / 深青 / 芥末黄 / 淡紫
   Style   : Editorial Neo-Paper · 硬描边 · 错位投影 · 大字号排版
   ========================================================================== */

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

:root{
  --ink:#171412;
  --ink-soft:#5A5048;
  --cream:#FBF6EE;
  --cream-2:#F2EAD9;
  --paper:#FFFFFF;
  --coral:#FF5A3C;
  --teal:#0E6B62;
  --yellow:#FFC93C;
  --lilac:#D8C9FF;
  --line:2px solid var(--ink);
}

html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }

body{
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x:hidden;
  color:var(--ink);
  line-height:1.72;
  letter-spacing:.01em;
  background-color:var(--cream);
  background-image:radial-gradient(rgba(23,20,18,.11) 1.1px, transparent 1.1px);
  background-size:24px 24px;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

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

img{ max-width:100%; display:block; }

a{ color:inherit; }

:focus-visible{ outline:3px solid var(--coral); outline-offset:3px; }

/* ==========================================================================
   核心布局 — 居中
   ========================================================================== */

.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  position:relative;
}

.section{
  padding:80px 0;
  position:relative;
  scroll-margin-top:92px;
}

.section:nth-child(even){
  background:var(--cream-2);
  border-top:var(--line);
  border-bottom:var(--line);
}

.section:nth-child(even)::after{
  content:'';
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:linear-gradient(rgba(23,20,18,.045) 1px, transparent 1px);
  background-size:100% 32px;
  opacity:.7;
}

.section > .container{ z-index:1; }

/* ==========================================================================
   固定顶部导航
   ========================================================================== */

.site-header{
  position:fixed;
  top:0; left:0;
  width:100%;
  z-index:1000;
  background:rgba(251,246,238,.9);
  backdrop-filter:blur(12px) saturate(140%);
  -webkit-backdrop-filter:blur(12px) saturate(140%);
  border-bottom:2px solid var(--ink);
}

.site-header::before{
  content:'';
  position:absolute;
  top:0; left:0;
  width:100%;
  height:5px;
  background:linear-gradient(90deg,
    var(--coral) 0 25%,
    var(--yellow) 25% 50%,
    var(--teal) 50% 75%,
    var(--lilac) 75% 100%);
}

.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:1.2rem;
  letter-spacing:.08em;
  text-decoration:none;
  color:inherit;
  white-space:nowrap;
}

.logo-icon{
  width:36px;
  height:36px;
  border-radius:50% 50% 6px 50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  background:var(--coral);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transform:rotate(-6deg);
  transition:transform .25s ease, box-shadow .25s ease;
}

.logo:hover .logo-icon{
  transform:rotate(6deg) scale(1.05);
  box-shadow:4px 4px 0 var(--ink);
}

.main-nav{
  display:flex;
  align-items:center;
  gap:28px;
  list-style:none;
}

.main-nav a{
  position:relative;
  text-decoration:none;
  font-size:.9rem;
  font-weight:600;
  padding:4px 0;
  transition:color .2s ease;
}

.main-nav a::after{
  content:'';
  position:absolute;
  left:0; bottom:-2px;
  width:0; height:3px;
  background:var(--coral);
  transition:width .28s cubic-bezier(.6,0,.2,1);
}

.main-nav a:hover::after{ width:100%; }
.main-nav a:hover{ color:var(--coral); }

.nav-cta{
  padding:8px 20px;
  border-radius:6px;
  color:#fff !important;
  font-weight:700;
  letter-spacing:.04em;
  background:var(--teal);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease;
}

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

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

.menu-toggle{
  display:none;
  width:42px;
  height:42px;
  align-items:center;
  justify-content:center;
  border:2px solid var(--ink);
  border-radius:6px;
  background:var(--yellow);
  box-shadow:3px 3px 0 var(--ink);
  cursor:pointer;
  font-size:1.1rem;
  font-weight:800;
  color:var(--ink);
  transition:transform .18s ease, box-shadow .18s ease;
}

.menu-toggle:hover{ transform:translate(-2px,-2px); box-shadow:5px 5px 0 var(--ink); }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero{
  min-height:70vh;
  display:flex;
  align-items:center;
  padding:150px 0 88px;
  position:relative;
  overflow:hidden;
}

.hero::before{
  content:'';
  position:absolute;
  right:-110px;
  top:110px;
  width:340px;
  height:340px;
  border:2px dashed rgba(23,20,18,.18);
  border-radius:50%;
  animation:spinSlow 48s linear infinite;
  pointer-events:none;
}

.hero::after{
  content:'';
  position:absolute;
  left:-70px;
  bottom:-90px;
  width:220px;
  height:220px;
  border-radius:38% 62% 55% 45% / 55% 42% 58% 45%;
  background:var(--lilac);
  opacity:.55;
  filter:blur(2px);
  pointer-events:none;
}

.hero-content{
  max-width:720px;
  position:relative;
  z-index:2;
}

.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.2em;
  padding:6px 16px;
  border-radius:999px;
  margin-bottom:22px;
  background:var(--yellow);
  border:2px solid var(--ink);
  box-shadow:3px 3px 0 var(--ink);
}

.hero h1{
  font-size:clamp(2.3rem, 5.6vw, 4.2rem);
  line-height:1.12;
  font-weight:900;
  letter-spacing:-.025em;
  margin-bottom:22px;
  text-shadow:5px 5px 0 rgba(255,90,60,.16);
}

.hero p{
  font-size:1.08rem;
  opacity:.74;
  max-width:560px;
  margin-bottom:34px;
}

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

.hero-image{
  border-radius:10px;
  overflow:hidden;
  border:var(--line);
  box-shadow:10px 10px 0 var(--yellow);
  background:var(--paper);
  position:relative;
  z-index:2;
}

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

/* ==========================================================================
   按钮
   ========================================================================== */

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:13px 30px;
  border-radius:6px;
  font-weight:700;
  font-size:.98rem;
  letter-spacing:.03em;
  cursor:pointer;
  border:2px solid var(--ink);
  text-decoration:none;
  transition:transform .18s ease, box-shadow .18s ease, background .18s ease, color .18s ease;
}

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

.btn-primary:hover{
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 var(--ink);
}

.btn-primary:active{
  transform:translate(3px,3px);
  box-shadow:1px 1px 0 var(--ink);
}

.btn-outline{
  background:transparent;
  border:2px solid var(--ink);
  color:var(--ink);
  box-shadow:4px 4px 0 rgba(23,20,18,.14);
}

.btn-outline:hover{
  background:var(--yellow);
  transform:translate(-2px,-2px);
  box-shadow:7px 7px 0 var(--ink);
}

.btn-outline:active{
  transform:translate(3px,3px);
  box-shadow:1px 1px 0 var(--ink);
}

/* ==========================================================================
   标签 / 标题
   ========================================================================== */

.section-label{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--coral);
  margin-bottom:14px;
}

.section-label::before{
  content:'';
  width:11px;
  height:11px;
  background:var(--coral);
  border:2px solid var(--ink);
  transform:rotate(45deg);
  flex:0 0 auto;
}

.section-title{
  font-size:clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.24;
  margin-bottom:16px;
}

.section-title::after{
  content:'';
  display:block;
  width:64px;
  height:6px;
  margin-top:16px;
  background:var(--yellow);
  border:2px solid var(--ink);
}

.section-desc{
  max-width:600px;
  opacity:.74;
  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:26px;
}

.category-card{
  position:relative;
  border-radius:4px;
  padding:32px 28px;
  border:var(--line);
  background:var(--paper);
  box-shadow:4px 4px 0 rgba(23,20,18,.10);
  transition:transform .22s cubic-bezier(.34,1.4,.5,1), box-shadow .22s ease;
  overflow:hidden;
}

.category-card::before{
  content:'';
  position:absolute;
  top:0; left:26px;
  width:46px;
  height:7px;
  background:var(--coral);
  border-left:2px solid var(--ink);
  border-right:2px solid var(--ink);
  border-bottom:2px solid var(--ink);
}

.category-card:nth-child(2)::before{ background:var(--teal); }
.category-card:nth-child(3)::before{ background:var(--yellow); }
.category-card:nth-child(4)::before{ background:var(--lilac); }
.category-card:nth-child(5)::before{ background:var(--coral); }
.category-card:nth-child(6)::before{ background:var(--teal); }

.category-card:hover{
  transform:translate(-4px,-4px);
  box-shadow:9px 9px 0 var(--ink);
}

.category-card h3{
  font-size:1.15rem;
  font-weight:800;
  letter-spacing:-.01em;
  margin:22px 0 10px;
}

.category-card p{
  font-size:.94rem;
  opacity:.72;
  margin-bottom:20px;
}

.card-icon{
  width:52px;
  height:52px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:0;
  margin-top:18px;
  font-size:1.35rem;
  border:2px solid var(--ink);
  background:var(--lilac);
  box-shadow:3px 3px 0 var(--ink);
}

.category-card:nth-child(2) .card-icon{ background:var(--yellow); }
.category-card:nth-child(3) .card-icon{ background:#BEE7E0; }
.category-card:nth-child(4) .card-icon{ background:#FFD3C9; }
.category-card:nth-child(5) .card-icon{ background:var(--lilac); }
.category-card:nth-child(6) .card-icon{ background:var(--yellow); }

.card-link{
  font-weight:800;
  font-size:.84rem;
  letter-spacing:.1em;
  text-decoration:none;
  color:var(--coral);
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:gap .2s ease, color .2s ease;
}

.card-link::after{
  content:'→';
  font-size:1rem;
  transition:transform .25s ease;
}

.card-link:hover{ gap:12px; color:var(--teal); }
.card-link:hover::after{ transform:translateX(3px); }

/* ==========================================================================
   特性块
   ========================================================================== */

.feature-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
  margin-bottom:72px;
}

.feature-block:last-child{ margin-bottom:0; }

.feature-image{
  border-radius:8px;
  overflow:hidden;
  border:var(--line);
  box-shadow:12px 12px 0 var(--yellow);
  background:var(--paper);
}

.feature-block:nth-child(even) .feature-image{
  box-shadow:12px 12px 0 var(--lilac);
}

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

.feature-text{ position:relative; }

.feature-text h3{
  font-size:clamp(1.4rem, 2.4vw, 1.75rem);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.3;
  margin-bottom:16px;
}

.feature-text p{
  opacity:.75;
  margin-bottom:22px;
  font-size:.99rem;
}

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

.feature-list li{
  padding:9px 0;
  display:flex;
  align-items:center;
  gap:12px;
  font-weight:600;
  font-size:.97rem;
  border-bottom:1px dashed rgba(23,20,18,.2);
}

.feature-list li:last-child{ border-bottom:none; }

.feature-list li::before{
  content:'✓';
  font-weight:900;
  color:#fff;
  background:var(--teal);
  border:2px solid var(--ink);
  width:24px;
  height:24px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.72rem;
  flex:0 0 auto;
}

.feature-list li:nth-child(even)::before{ background:var(--coral); }

/* ==========================================================================
   数据条
   ========================================================================== */

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

.stat-item{
  padding:30px 18px;
  border-radius:4px;
  border:var(--line);
  background:var(--paper);
  box-shadow:5px 5px 0 rgba(23,20,18,.14);
  transition:transform .25s cubic-bezier(.34,1.4,.5,1), box-shadow .25s ease;
}

.stat-item:nth-child(odd){ transform:rotate(-1.2deg); }
.stat-item:nth-child(even){ transform:rotate(1.2deg); }

.stat-item:hover{
  transform:rotate(0deg) translateY(-6px);
  box-shadow:5px 11px 0 rgba(23,20,18,.22);
}

.stat-number{
  font-size:clamp(1.9rem, 3.4vw, 2.6rem);
  font-weight:900;
  letter-spacing:-.04em;
  line-height:1.1;
  color:var(--coral);
  display:block;
}

.stat-item:nth-child(2) .stat-number{ color:var(--teal); }
.stat-item:nth-child(3) .stat-number{ color:#B8860B; }
.stat-item:nth-child(4) .stat-number{ color:var(--coral); }

.stat-label{
  font-size:.88rem;
  opacity:.66;
  margin-top:8px;
  letter-spacing:.1em;
  font-weight:600;
}

/* ==========================================================================
   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:var(--line);
  background:var(--paper);
  box-shadow:4px 4px 0 rgba(23,20,18,.10);
  transition:transform .22s cubic-bezier(.34,1.4,.5,1), box-shadow .22s ease;
}

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

.content-wall-item img{
  width:100%;
  height:200px;
  object-fit:cover;
  border-bottom:2px solid var(--ink);
  filter:saturate(1.05) contrast(1.03);
  transition:transform .5s cubic-bezier(.2,.7,.2,1);
}

.content-wall-item:hover img{ transform:scale(1.04); }

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

.content-wall-body h3{
  font-size:1.08rem;
  font-weight:800;
  line-height:1.4;
  margin-bottom:8px;
  letter-spacing:-.01em;
}

.content-wall-body p{
  font-size:.92rem;
  opacity:.7;
}

/* ==========================================================================
   FAQ
   ========================================================================== */

.faq-list{
  max-width:820px;
  margin:0 auto;
}

.faq-item{
  border:var(--line);
  border-radius:4px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  background:var(--paper);
  transition:background .22s ease, box-shadow .22s ease, transform .22s ease;
}

.faq-item:hover{
  box-shadow:5px 5px 0 rgba(23,20,18,.16);
}

.faq-item.open{
  background:var(--yellow);
  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:18px;
}

.faq-item .faq-question::after{
  content:'+';
  font-size:1.4rem;
  font-weight:900;
  line-height:1;
  color:var(--coral);
  flex:0 0 auto;
  transition:transform .3s cubic-bezier(.34,1.4,.5,1);
}

.faq-item.open .faq-question::after{
  content:'−';
  transform:rotate(180deg);
}

.faq-item .faq-answer{
  padding:0 22px 18px;
  display:none;
  opacity:.78;
  font-size:.96rem;
  line-height:1.75;
}

.faq-item.open .faq-answer{
  display:block;
  animation:fadeUp .32s ease both;
}

/* ==========================================================================
   CTA 横幅
   ========================================================================== */

.cta-banner{
  position:relative;
  overflow:hidden;
  padding:64px 40px;
  text-align:center;
  border-radius:10px;
  border:2px solid var(--ink);
  color:#fff;
  background:linear-gradient(118deg, var(--teal) 0%, #16998C 48%, var(--coral) 100%);
  box-shadow:10px 10px 0 var(--yellow);
}

.cta-banner::before{
  content:'';
  position:absolute;
  right:-70px;
  top:-70px;
  width:210px;
  height:210px;
  border-radius:50%;
  border:2px dashed rgba(255,255,255,.5);
  animation:spinSlow 40s linear infinite;
}

.cta-banner::after{
  content:'';
  position:absolute;
  left:-50px;
  bottom:-60px;
  width:150px;
  height:150px;
  border-radius:50%;
  background:rgba(255,255,255,.14);
}

.cta-banner h2{
  position:relative;
  z-index:2;
  color:#fff;
  font-size:clamp(1.6rem, 3vw, 2.35rem);
  font-weight:900;
  letter-spacing:-.02em;
  line-height:1.3;
  margin-bottom:14px;
}

.cta-banner p{
  position:relative;
  z-index:2;
  color:rgba(255,255,255,.92);
  max-width:560px;
  margin:0 auto 30px;
  font-size:1rem;
}

.cta-banner .btn{ position:relative; z-index:2; }

.cta-banner .btn-primary{
  background:var(--cream);
  color:var(--ink);
  box-shadow:5px 5px 0 var(--ink);
}

.cta-banner .btn-primary:hover{
  background:var(--yellow);
  transform:translate(-2px,-2px);
  box-shadow:8px 8px 0 var(--ink);
}

/* ==========================================================================
   页脚
   ========================================================================== */

.site-footer{
  position:relative;
  padding:64px 0 28px;
  background:var(--cream-2);
  border-top:2px solid var(--ink);
}

.site-footer::before{
  content:'';
  position:absolute;
  top:0; left:0;
  width:100%;
  height:6px;
  background:repeating-linear-gradient(90deg,
    var(--coral) 0 14px,
    var(--yellow) 14px 28px,
    var(--teal) 28px 42px,
    var(--lilac) 42px 56px);
}

.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;
}

.footer-brand .logo{ margin-bottom:16px; }

.footer-brand p{
  font-size:.94rem;
  opacity:.7;
  max-width:340px;
}

.footer-col h4{
  font-size:.92rem;
  font-weight:800;
  letter-spacing:.14em;
  margin-bottom:18px;
  position:relative;
  padding-bottom:10px;
}

.footer-col h4::after{
  content:'';
  position:absolute;
  left:0; bottom:0;
  width:28px;
  height:4px;
  background:var(--coral);
}

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

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

.footer-col a{
  text-decoration:none;
  font-size:.92rem;
  opacity:.72;
  display:inline-block;
  transition:opacity .2s ease, color .2s ease, transform .2s ease;
}

.footer-col a:hover{
  opacity:1;
  color:var(--coral);
  transform:translateX(4px);
}

.footer-bottom{
  border-top:1px solid rgba(23,20,18,.16);
  margin-top:44px;
  padding-top:22px;
  text-align:center;
  font-size:.85rem;
  opacity:.62;
  letter-spacing:.04em;
}

/* ==========================================================================
   工具类
   ========================================================================== */

.text-accent{
  color:var(--coral);
  font-weight:900;
  background:linear-gradient(transparent 60%, rgba(255,201,60,.8) 60%);
  padding:0 3px;
}

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

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

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

.seo-description{
  max-width:600px;
  margin:0 auto 48px;
  opacity:.72;
  font-size:.98rem;
  line-height:1.8;
}

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

/* ==========================================================================
   动画
   ========================================================================== */

@keyframes fadeUp{
  from{ opacity:0; transform:translateY(-6px); }
  to{ opacity:.78; transform:translateY(0); }
}

@keyframes spinSlow{
  from{ transform:rotate(0deg); }
  to{ transform:rotate(360deg); }
}

/* ==========================================================================
   响应式
   ========================================================================== */

@media (max-width: 1024px){
  .feature-block{ gap:40px; }
  .footer-grid{ grid-template-columns:1.5fr 1fr 1fr; }
}

@media (max-width: 768px){
  .feature-block{ grid-template-columns:1fr; gap:32px; }
  .feature-block:nth-child(even) .feature-image,
  .feature-block:nth-child(odd) .feature-image{
    order:-1;
    box-shadow:8px 8px 0 var(--yellow);
  }
  .stats-bar{ grid-template-columns:repeat(2,1fr); }
  .stat-item:nth-child(odd),
  .stat-item:nth-child(even){ transform:none; }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }

  .main-nav{ display:none; }
  .menu-toggle{ display:flex; }

  .main-nav.open{
    display:flex;
    flex-direction:column;
    align-items:flex-start;
    gap:6px;
    position:absolute;
    top:68px;
    left:0;
    width:100%;
    background:var(--cream);
    padding:22px 24px 26px;
    border-bottom:2px solid var(--ink);
    box-shadow:0 8px 0 rgba(23,20,18,.12);
  }

  .main-nav.open li{ width:100%; }

  .main-nav.open a{
    display:block;
    width:100%;
    padding:10px 0;
    font-size:1rem;
    border-bottom:1px dashed rgba(23,20,18,.18);
  }

  .main-nav.open .nav-cta{
    text-align:center;
    margin-top:14px;
    border-bottom:2px solid var(--ink);
    padding:12px 20px;
  }

  .hero{ padding:130px 0 72px; }
  .hero::before{ display:none; }
  .hero::after{ opacity:.35; }

  .section{ padding:64px 0; }
  .cta-banner{ padding:48px 24px; }
}

@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{ width:100%; }
  .category-card,
  .content-wall-body{ padding:22px 20px; }
  .stat-item{ padding:24px 16px; }
}

@media (prefers-reduced-motion: reduce){
  *,
  *::before,
  *::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
}