/* =========================================================
   黑料吃 · DESIGN SYSTEM
   Style: Editorial / Acid Highlight / Neo-Paper
   Palette: Warm Paper + Electric Violet + Acid Yellow
   ========================================================= */

:root{
  --paper:      #F8F4EA;
  --paper-alt:  #F3EEE1;
  --surface:    #FFFFFF;
  --ink:        #17161D;
  --muted:      #6C6779;
  --violet:     #4A1FF0;
  --violet-2:   #6B4BFF;
  --violet-soft:#ECE7FF;
  --acid:       #E6FF45;
  --acid-deep:  #D3F01E;
  --line:       #E2DBCC;
  --radius:     16px;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, monospace;
}

/* ============ 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;
  color:var(--ink);
  background-color:var(--paper);
  background-image: radial-gradient(circle at 1px 1px, rgba(23,22,29,.055) 1px, transparent 0);
  background-size: 24px 24px;
  line-height:1.72;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

img{ max-width:100%; display:block; border:0; }
a{ color:inherit; }
button{ font-family:inherit; }
ul{ list-style:none; }

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

::-webkit-scrollbar{ width:11px; }
::-webkit-scrollbar-track{ background:var(--paper); }
::-webkit-scrollbar-thumb{ background:#D8D0BE; border-radius:20px; border:3px solid var(--paper); }
::-webkit-scrollbar-thumb:hover{ background:var(--violet); }

section[id], div[id]{ scroll-margin-top:92px; }

/* ============ 核心布局 ============ */
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

.section{ padding:88px 0; position:relative; }

.section:nth-child(even){
  background:var(--paper-alt);
  box-shadow: inset 0 1px 0 var(--line), inset 0 -1px 0 var(--line);
}

/* ============ 导航 ============ */
.site-header{
  position:fixed;
  top:0; left:0;
  width:100%;
  z-index:1000;
  background:rgba(248,244,234,.82);
  backdrop-filter:blur(14px) saturate(1.4);
  -webkit-backdrop-filter:blur(14px) saturate(1.4);
  border-bottom:1px solid var(--line);
}

.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:1.22rem;
  letter-spacing:-.02em;
  text-decoration:none;
  color:var(--ink);
  white-space:nowrap;
}

.logo-icon{
  width:36px; height:36px;
  border-radius:11px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  font-weight:800;
  color:#fff;
  background:var(--violet);
  box-shadow:3px 3px 0 var(--acid);
  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:26px;
  list-style:none;
}

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

.main-nav a:not(.nav-cta)::after{
  content:'';
  position:absolute;
  left:0; bottom:-5px;
  width:0; height:2px;
  background:var(--violet);
  transition:width .26s cubic-bezier(.6,.1,.2,1);
}
.main-nav a:not(.nav-cta):hover{ color:var(--violet); }
.main-nav a:not(.nav-cta):hover::after{ width:100%; }

.nav-cta{
  padding:9px 22px;
  border-radius:999px;
  color:#fff !important;
  font-weight:700;
  font-size:.85rem;
  letter-spacing:.02em;
  background:var(--violet);
  box-shadow:0 10px 20px -12px rgba(74,31,240,.9);
  transition:transform .2s ease, box-shadow .2s ease, background .2s;
}
.nav-cta:hover{
  transform:translateY(-2px);
  background:var(--violet-2);
  box-shadow:0 14px 24px -12px rgba(74,31,240,.95);
}

.menu-toggle{
  display:none;
  width:42px; height:42px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--line);
  border-radius:12px;
  background:var(--surface);
  color:var(--ink);
  font-size:1.1rem;
  cursor:pointer;
}

/* ============ HERO ============ */
.hero{
  min-height:70vh;
  display:flex;
  align-items:center;
  position:relative;
  padding:128px 0 76px;
  overflow:hidden;
}

.hero::before{
  content:'';
  position:absolute;
  top:-160px; right:-180px;
  width:560px; height:560px;
  background:radial-gradient(circle, rgba(74,31,240,.14), rgba(74,31,240,0) 68%);
  pointer-events:none;
}

.hero::after{
  content:'内幕';
  position:absolute;
  right:-10px; bottom:-58px;
  font-size:clamp(6rem,17vw,15rem);
  font-weight:900;
  letter-spacing:-.06em;
  color:transparent;
  -webkit-text-stroke:1.5px rgba(74,31,240,.10);
  pointer-events:none;
  line-height:1;
  user-select:none;
}

.hero-content{
  max-width:760px;
  position:relative;
  z-index:2;
}

.hero-eyebrow{
  display:inline-block;
  font-family:var(--mono);
  font-size:.74rem;
  font-weight:700;
  letter-spacing:.22em;
  text-transform:uppercase;
  padding:7px 18px;
  border-radius:999px;
  margin-bottom:24px;
  color:var(--violet);
  background:var(--violet-soft);
  border:1px dashed rgba(74,31,240,.35);
}

.hero h1{
  font-size:clamp(2.4rem, 6.2vw, 4.4rem);
  line-height:1.04;
  letter-spacing:-.035em;
  font-weight:900;
  margin-bottom:24px;
}

.hero h1 em,
.hero h1 .hl{
  font-style:normal;
  background:linear-gradient(180deg, transparent 60%, var(--acid) 60%, var(--acid) 92%, transparent 92%);
  padding:0 .06em;
}

.hero p{
  font-size:1.09rem;
  color:var(--muted);
  max-width:580px;
  margin-bottom:36px;
  line-height:1.85;
}

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

.hero-image{
  border-radius:22px;
  overflow:hidden;
  margin-top:56px;
  border:1.5px solid var(--ink);
  box-shadow:14px 14px 0 var(--acid);
  background:var(--surface);
}
.hero-image img{ width:100%; height:auto; }

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:9px;
  padding:14px 30px;
  border-radius:999px;
  font-weight:700;
  font-size:.94rem;
  letter-spacing:.01em;
  cursor:pointer;
  border:none;
  text-decoration:none;
  transition:transform .2s cubic-bezier(.5,.1,.2,1), box-shadow .2s ease, background .2s ease, color .2s ease;
}

.btn-primary{
  color:#fff;
  background:var(--violet);
  box-shadow:0 14px 26px -14px rgba(74,31,240,.95);
}
.btn-primary:hover{
  transform:translateY(-3px);
  background:var(--violet-2);
  box-shadow:0 20px 32px -16px rgba(74,31,240,1);
}

.btn-outline{
  background:transparent;
  border:1.5px solid var(--ink);
  color:var(--ink);
}
.btn-outline:hover{
  background:var(--acid);
  border-color:var(--ink);
  transform:translateY(-3px);
  box-shadow:5px 5px 0 var(--ink);
}

/* ============ 标签 / 标题 ============ */
.section-label{
  display:inline-block;
  position:relative;
  font-size:.72rem;
  font-weight:800;
  letter-spacing:.28em;
  text-transform:uppercase;
  color:var(--violet);
  padding-left:34px;
  margin-bottom:14px;
}
.section-label::before{
  content:'';
  position:absolute;
  left:0; top:50%;
  width:22px; height:2px;
  background:var(--violet);
  transform:translateY(-50%);
}

.section-title{
  font-size:clamp(1.7rem, 3.2vw, 2.5rem);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.18;
  margin-bottom:16px;
}

.section-desc{
  max-width:620px;
  color:var(--muted);
  margin-bottom:44px;
  line-height:1.85;
}

/* ============ 卡片网格 ============ */
.cards-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill, minmax(260px, 1fr));
  gap:24px;
}

.category-card{
  position:relative;
  border-radius:var(--radius);
  padding:32px 28px;
  border:1px solid var(--line);
  background:var(--surface);
  overflow:hidden;
  transition:transform .25s cubic-bezier(.5,.1,.2,1), box-shadow .25s ease, border-color .25s ease;
}

.category-card::after{
  content:'';
  position:absolute;
  left:0; top:0;
  width:100%; height:4px;
  background:linear-gradient(90deg, var(--violet), var(--acid));
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .32s cubic-bezier(.6,.1,.2,1);
}

.category-card:hover{
  transform:translateY(-6px);
  border-color:transparent;
  box-shadow:0 22px 38px -26px rgba(23,22,29,.6);
}
.category-card:hover::after{ transform:scaleX(1); }

.card-icon{
  width:52px; height:52px;
  border-radius:14px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:18px;
  font-size:1.35rem;
  background:var(--violet-soft);
  color:var(--violet);
  transition:transform .25s ease;
}
.category-card:nth-child(3n+2) .card-icon{ background:var(--acid); color:var(--ink); }
.category-card:nth-child(3n+3) .card-icon{ background:#FFE9DE; color:#D9401A; }
.category-card:hover .card-icon{ transform:rotate(-6deg) scale(1.06); }

.category-card h3{
  font-size:1.12rem;
  font-weight:800;
  letter-spacing:-.015em;
  margin-bottom:8px;
}
.category-card p{
  font-size:.9rem;
  color:var(--muted);
  line-height:1.75;
  margin-bottom:16px;
}

.card-link{
  font-weight:800;
  font-size:.82rem;
  letter-spacing:.04em;
  text-decoration:none;
  color:var(--violet);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.card-link::after{
  content:'→';
  transition:transform .22s ease;
}
.card-link:hover::after{ transform:translateX(5px); }

/* ============ 特性块 ============ */
.feature-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:56px;
  align-items:center;
}

.feature-image{
  border-radius:22px;
  overflow:hidden;
  border:1.5px solid var(--ink);
  box-shadow:12px 12px 0 var(--violet-soft);
  background:var(--surface);
}
.feature-image img{ width:100%; height:auto; }

.feature-text h2{
  font-size:clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.22;
  margin-bottom:16px;
}
.feature-text p{
  color:var(--muted);
  margin-bottom:20px;
}

.feature-list{ list-style:none; margin-top:8px; }
.feature-list li{
  padding:9px 0;
  display:flex;
  align-items:flex-start;
  gap:12px;
  font-size:.95rem;
  border-bottom:1px dashed var(--line);
}
.feature-list li:last-child{ border-bottom:none; }
.feature-list li::before{
  content:'✓';
  font-weight:900;
  font-size:.78rem;
  flex:0 0 auto;
  width:22px; height:22px;
  margin-top:3px;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--ink);
  background:var(--acid);
}

/* ============ 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:var(--radius);
  border:1px solid var(--line);
  background:var(--surface);
  position:relative;
  overflow:hidden;
  transition:transform .25s ease, box-shadow .25s ease;
}
.stat-item::before{
  content:'';
  position:absolute;
  left:50%; top:0;
  width:44px; height:3px;
  background:var(--violet);
  transform:translateX(-50%);
  border-radius:0 0 6px 6px;
}
.stat-item:hover{
  transform:translateY(-5px);
  box-shadow:0 20px 34px -24px rgba(23,22,29,.55);
}

.stat-number{
  font-family:var(--mono);
  font-size:clamp(1.9rem, 3.4vw, 2.9rem);
  font-weight:800;
  line-height:1.05;
  letter-spacing:-.045em;
  color:var(--violet);
  font-variant-numeric:tabular-nums;
}
.stat-label{
  font-size:.82rem;
  color:var(--muted);
  margin-top:10px;
  letter-spacing:.09em;
}

/* ============ 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:1px solid var(--line);
  background:var(--surface);
  transition:transform .25s cubic-bezier(.5,.1,.2,1), box-shadow .25s ease;
  display:flex;
  flex-direction:column;
}
.content-wall-item:hover{
  transform:translateY(-6px);
  box-shadow:0 24px 40px -28px rgba(23,22,29,.6);
}
.content-wall-item img{
  width:100%;
  height:200px;
  object-fit:cover;
  transition:transform .5s cubic-bezier(.4,.1,.2,1);
}
.content-wall-item:hover img{ transform:scale(1.05); }

.content-wall-body{ padding:22px 20px 24px; }
.content-wall-body h3{
  font-size:1.04rem;
  font-weight:800;
  letter-spacing:-.015em;
  line-height:1.4;
  margin-bottom:8px;
}
.content-wall-body p{
  font-size:.88rem;
  color:var(--muted);
  line-height:1.75;
}

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

.faq-item{
  border:1px solid var(--line);
  border-radius:14px;
  margin-bottom:10px;
  overflow:hidden;
  cursor:pointer;
  background:var(--surface);
  transition:border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.faq-item:hover{ border-color:#CFC6B2; }

.faq-item .faq-question{
  padding:19px 24px;
  font-weight:700;
  font-size:.98rem;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:18px;
}
.faq-item .faq-question::after{
  content:'+';
  flex:0 0 auto;
  font-size:1.35rem;
  font-weight:700;
  line-height:1;
  color:var(--violet);
  transition:transform .28s cubic-bezier(.5,.1,.2,1);
}
.faq-item .faq-answer{
  padding:0 24px 20px;
  display:none;
  color:var(--muted);
  font-size:.93rem;
  line-height:1.85;
  max-width:660px;
}
.faq-item.open{
  border-color:var(--violet);
  box-shadow:0 0 0 3px var(--violet-soft);
}
.faq-item.open .faq-answer{ display:block; }
.faq-item.open .faq-question::after{ transform:rotate(45deg); }

/* ============ CTA横幅 ============ */
.cta-banner{
  position:relative;
  padding:64px 32px;
  text-align:center;
  border-radius:26px;
  color:var(--ink);
  background:var(--acid);
  border:1.5px solid var(--ink);
  box-shadow:10px 10px 0 var(--violet);
  overflow:hidden;
}
.cta-banner::before{
  content:'';
  position:absolute;
  inset:0;
  background-image:radial-gradient(circle at 1px 1px, rgba(23,22,29,.14) 1px, transparent 0);
  background-size:18px 18px;
  pointer-events:none;
  opacity:.55;
}
.cta-banner h2{
  position:relative;
  color:var(--ink);
  font-size:clamp(1.55rem, 3vw, 2.35rem);
  font-weight:900;
  letter-spacing:-.03em;
  line-height:1.2;
  margin-bottom:14px;
}
.cta-banner p{
  position:relative;
  color:rgba(23,22,29,.72);
  max-width:560px;
  margin:0 auto 30px;
  font-size:1rem;
}
.cta-banner .btn-primary{
  position:relative;
  background:var(--ink);
  color:#fff;
  box-shadow:0 14px 26px -14px rgba(23,22,29,.9);
}
.cta-banner .btn-primary:hover{
  background:var(--violet);
  box-shadow:0 20px 32px -16px rgba(74,31,240,.9);
}
.cta-banner .btn-outline{
  position:relative;
  border-color:var(--ink);
  color:var(--ink);
}
.cta-banner .btn-outline:hover{ background:#fff; }

/* ============ 页脚 ============ */
.site-footer{
  padding:68px 0 28px;
  background:var(--paper-alt);
  border-top:1px solid var(--line);
  position:relative;
}

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

.footer-brand p{
  color:var(--muted);
  font-size:.9rem;
  line-height:1.85;
  margin-top:16px;
  max-width:320px;
}

.footer-col h4{
  font-size:.74rem;
  font-weight:800;
  letter-spacing:.2em;
  text-transform:uppercase;
  color:var(--violet);
  margin-bottom:16px;
}
.footer-col a{
  display:block;
  color:var(--muted);
  text-decoration:none;
  font-size:.9rem;
  padding:5px 0;
  transition:color .2s ease, transform .2s ease;
}
.footer-col a:hover{
  color:var(--ink);
  transform:translateX(5px);
}

.footer-bottom{
  border-top:1px solid var(--line);
  margin-top:46px;
  padding-top:22px;
  text-align:center;
  font-size:.82rem;
  color:var(--muted);
  letter-spacing:.03em;
}

/* ============ 工具类 ============ */
.text-accent{ color:var(--violet); font-weight:800; }
.text-center{ text-align:center; }
.seo-description{
  max-width:640px;
  margin:0 auto 48px;
  color:var(--muted);
  line-height:1.85;
  text-align:center;
}
.mt-0{ margin-top:0; }
.mb-0{ margin-bottom:0; }

/* ============ 响应式 ============ */
@media (max-width: 768px){
  .section{ padding:64px 0; }
  .feature-block{ grid-template-columns:1fr; gap:32px; }
  .feature-image{ box-shadow:8px 8px 0 var(--violet-soft); }
  .stats-bar{ grid-template-columns:repeat(2,1fr); }
  .footer-grid{ grid-template-columns:1fr 1fr; gap:32px; }
  .hero{ padding:112px 0 60px; }
  .hero::after{ display:none; }
  .cta-banner{ padding:48px 22px; box-shadow:7px 7px 0 var(--violet); }

  .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:rgba(248,244,234,.98);
    backdrop-filter:blur(14px);
    padding:18px 24px 26px;
    border-bottom:1px solid var(--line);
    box-shadow:0 22px 40px -28px rgba(23,22,29,.5);
  }
  .main-nav.open li{ width:100%; }
  .main-nav.open a{ display:block; width:100%; padding:10px 0; font-size:1rem; }
  .main-nav.open .nav-cta{ display:inline-block; width:auto; margin-top:8px; }
}

@media (max-width: 480px){
  .cards-grid, .content-wall, .stats-bar{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; gap:28px; }
  .hero-buttons{ flex-direction:column; align-items:stretch; }
  .hero-buttons .btn{ justify-content:center; }
  .hero h1{ letter-spacing:-.03em; }
  .section-title{ letter-spacing:-.02em; }
  .content-wall-item img{ height:180px; }
}

@media (prefers-reduced-motion: reduce){
  *{ transition:none !important; animation:none !important; scroll-behavior:auto !important; }
}