:root{
  --paper:#f7f4ee;
  --paper-2:#fffdf8;
  --paper-3:#efe9df;
  --ink:#161210;
  --ink-soft:#3b342d;
  --muted:#7c7368;
  --accent:#b02a26;
  --accent-soft:#efe0d8;
  --hair:#dcd4c7;
  --rule:#161210;
  --serif:"Noto Serif SC","Songti SC","STSong","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --max:1180px;
  --ease:cubic-bezier(.19,1,.22,1);
}

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

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

body{
  margin:0;
  font-family:var(--sans);
  font-size:16px;
  line-height:1.85;
  color:var(--ink-soft);
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 12% 8%,rgba(176,42,38,.045),transparent 42%),
    radial-gradient(circle at 88% 92%,rgba(22,18,16,.04),transparent 46%);
  background-attachment:fixed;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}

::selection{background:var(--accent);color:#fffdf8;}

img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button{font-family:inherit;}

h1,h2,h3,h4,h5{
  font-family:var(--serif);
  color:var(--ink);
  font-weight:700;
  line-height:1.22;
  letter-spacing:.015em;
  margin:0 0 .6em;
}

p{margin:0 0 1.1em;}

.container{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:0 clamp(20px,4.4vw,44px);
}

.section{
  padding:clamp(56px,8vw,116px) 0;
  position:relative;
}

.section-label{
  display:inline-flex;
  align-items:center;
  gap:14px;
  font-family:var(--sans);
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.34em;
  color:var(--accent);
  margin-bottom:20px;
}
.section-label::before{
  content:"";
  width:38px;
  height:1px;
  background:var(--accent);
  flex:0 0 auto;
}

.section-title{
  font-size:clamp(1.85rem,3.5vw,2.9rem);
  line-height:1.24;
  margin:0 0 20px;
  max-width:24ch;
}

.section-desc{
  font-size:clamp(.96rem,1.2vw,1.05rem);
  line-height:1.95;
  color:var(--muted);
  max-width:62ch;
  margin:0 0 8px;
}

/* ---------------- 页头 ---------------- */

.site-header{
  position:sticky;
  top:0;
  z-index:120;
  background:rgba(247,244,238,.94);
  backdrop-filter:blur(10px) saturate(1.1);
  border-bottom:1px solid var(--hair);
}
.site-header::before{
  content:"";
  display:block;
  height:4px;
  background:linear-gradient(90deg,var(--accent) 0 22%,var(--ink) 22% 100%);
}

.header-inner{
  width:100%;
  max-width:var(--max);
  margin:0 auto;
  padding:14px clamp(20px,4.4vw,44px);
  display:flex;
  align-items:center;
  gap:clamp(16px,3vw,42px);
  position:relative;
}

.logo{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-family:var(--serif);
  font-size:clamp(1.1rem,1.6vw,1.32rem);
  font-weight:700;
  letter-spacing:.06em;
  color:var(--ink);
  margin-right:auto;
  white-space:nowrap;
}

.logo-icon{
  width:42px;
  height:42px;
  flex:0 0 42px;
  display:grid;
  place-items:center;
  background:var(--accent);
  color:#fffdf8;
  font-family:var(--serif);
  font-size:1.05rem;
  font-weight:700;
  letter-spacing:0;
  transform:rotate(-3deg);
  box-shadow:3px 3px 0 0 var(--ink);
  transition:transform .5s var(--ease),box-shadow .5s var(--ease);
}
.logo:hover .logo-icon{
  transform:rotate(0) translate(-1px,-1px);
  box-shadow:4px 4px 0 0 var(--ink);
}

.main-nav{
  display:flex;
  align-items:center;
  gap:clamp(18px,2.4vw,32px);
}
.main-nav ul{
  list-style:none;
  display:flex;
  align-items:center;
  gap:clamp(18px,2.4vw,32px);
  margin:0;
  padding:0;
}
.main-nav a{
  position:relative;
  display:inline-block;
  padding:6px 0;
  font-size:.9rem;
  letter-spacing:.1em;
  color:var(--ink-soft);
  transition:color .35s var(--ease);
}
.main-nav a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:0;
  width:100%;
  height:1px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform .45s var(--ease);
}
.main-nav a:hover{color:var(--ink);}
.main-nav a:hover::after{transform:scaleX(1);}

.nav-cta{
  font-size:.82rem!important;
  letter-spacing:.14em;
  padding:11px 22px!important;
  white-space:nowrap;
}

.menu-toggle{
  display:none;
  width:46px;
  height:42px;
  padding:0;
  border:1px solid var(--rule);
  background:transparent;
  cursor:pointer;
  position:relative;
  color:transparent;
  font-size:0;
  overflow:hidden;
  transition:background .3s var(--ease);
}
.menu-toggle::before{
  content:"";
  position:absolute;
  left:11px;
  right:11px;
  top:15px;
  height:1.5px;
  background:var(--ink);
  box-shadow:0 6px 0 var(--ink),0 12px 0 var(--ink);
}
.menu-toggle:hover{background:var(--accent-soft);}

/* ---------------- 首屏 ---------------- */

.hero{
  position:relative;
  padding:clamp(44px,7vw,96px) 0 clamp(52px,7vw,104px);
  border-bottom:1px solid var(--hair);
}
.hero > .container{
  display:grid;
  grid-template-columns:1.06fr .94fr;
  gap:clamp(30px,5.4vw,76px);
  align-items:center;
}

.hero-content{min-width:0;}

.hero-eyebrow{
  display:inline-flex;
  align-items:center;
  gap:12px;
  font-size:.72rem;
  font-weight:600;
  letter-spacing:.3em;
  color:var(--ink-soft);
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
  padding:7px 2px;
  margin-bottom:26px;
}
.hero-eyebrow::before{
  content:"";
  width:8px;
  height:8px;
  background:var(--accent);
  flex:0 0 auto;
}

.hero h1,
.hero-title{
  font-family:var(--serif);
  font-size:clamp(2.2rem,5.9vw,4.4rem);
  line-height:1.1;
  letter-spacing:.01em;
  margin:0 0 24px;
  color:var(--ink);
}

.hero-content p:first-of-type::first-letter{
  float:left;
  font-family:var(--serif);
  font-size:3.3em;
  line-height:.86;
  font-weight:700;
  color:var(--accent);
  padding:.07em .16em 0 0;
}

.hero-content p{
  color:var(--muted);
  font-size:clamp(.96rem,1.2vw,1.06rem);
  line-height:1.95;
  max-width:52ch;
}

.hero-buttons{
  display:flex;
  flex-wrap:wrap;
  gap:14px;
  margin-top:32px;
}

.hero-image{
  position:relative;
  min-width:0;
  padding:14px;
  background:var(--paper-2);
  border:1px solid var(--rule);
  box-shadow:20px 20px 0 -1px var(--accent-soft);
  transition:box-shadow .6s var(--ease),transform .6s var(--ease);
}
.hero-image img{
  width:100%;
  height:100%;
  aspect-ratio:5/6;
  object-fit:cover;
  display:block;
  filter:saturate(.94) contrast(1.02);
}
.hero-image:hover{
  transform:translate(-4px,-4px);
  box-shadow:26px 26px 0 -1px var(--accent-soft);
}

/* ---------------- 按钮 ---------------- */

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:14px 30px;
  border-radius:0;
  border:1px solid var(--ink);
  background:transparent;
  color:var(--ink);
  font-family:var(--sans);
  font-size:.88rem;
  font-weight:600;
  letter-spacing:.16em;
  line-height:1;
  cursor:pointer;
  transition:background .4s var(--ease),color .4s var(--ease),border-color .4s var(--ease),transform .4s var(--ease);
}
.btn::after{
  content:"→";
  font-family:var(--serif);
  transition:transform .4s var(--ease);
}
.btn:hover::after{transform:translateX(5px);}

.btn-primary{
  background:var(--ink);
  border-color:var(--ink);
  color:var(--paper-2);
}
.btn-primary:hover{
  background:var(--accent);
  border-color:var(--accent);
  color:#fffdf8;
  transform:translateY(-2px);
}

.btn-outline{
  background:transparent;
  border-color:var(--ink);
  color:var(--ink);
}
.btn-outline:hover{
  background:var(--ink);
  color:var(--paper-2);
  transform:translateY(-2px);
}

/* ---------------- 栏目卡片 ---------------- */

.cards-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:0;
  border-top:2px solid var(--rule);
  margin-top:clamp(30px,4vw,52px);
}

.category-card{
  position:relative;
  padding:clamp(26px,3vw,40px) clamp(20px,2.4vw,32px);
  border-right:1px solid var(--hair);
  border-bottom:1px solid var(--hair);
  background:transparent;
  transition:background .5s var(--ease),transform .5s var(--ease);
}
.category-card:hover{
  background:var(--paper-2);
  transform:translateY(-4px);
}
.category-card::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:0;
  background:var(--accent);
  transition:width .55s var(--ease);
}
.category-card:hover::after{width:100%;}

.card-icon{
  width:56px;
  height:56px;
  display:grid;
  place-items:center;
  border:1px solid var(--rule);
  color:var(--accent);
  font-family:var(--serif);
  font-size:1.4rem;
  font-weight:700;
  margin-bottom:22px;
  background:var(--paper-2);
  transition:background .45s var(--ease),color .45s var(--ease),transform .45s var(--ease);
}
.category-card:hover .card-icon{
  background:var(--accent);
  color:#fffdf8;
  border-color:var(--accent);
  transform:rotate(-4deg);
}

.category-card h3{
  font-size:clamp(1.12rem,1.6vw,1.32rem);
  margin:0 0 12px;
  letter-spacing:.03em;
}
.category-card p{
  color:var(--muted);
  font-size:.94rem;
  line-height:1.9;
  margin:0 0 18px;
}

.card-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--accent);
  border-bottom:1px solid transparent;
  padding-bottom:3px;
  transition:border-color .4s var(--ease),gap .4s var(--ease);
}
.card-link::after{content:"↗";font-size:.9rem;}
.card-link:hover{border-bottom-color:var(--accent);gap:14px;}

/* ---------------- 特性区 ---------------- */

.feature-block{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:clamp(30px,5vw,72px);
  align-items:center;
  padding:clamp(34px,5vw,66px) 0;
  border-bottom:1px solid var(--hair);
}
.feature-block:nth-child(even) .feature-image{order:2;}
.feature-block:last-child{border-bottom:none;}

.feature-image{
  position:relative;
  min-width:0;
  padding:12px;
  background:var(--paper-2);
  border:1px solid var(--rule);
  box-shadow:-16px 16px 0 -1px var(--paper-3);
}
.feature-image img{
  width:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  display:block;
}

.feature-text{min-width:0;}

.feature-text h2,
.feature-text h3{
  font-size:clamp(1.5rem,2.7vw,2.15rem);
  line-height:1.3;
  margin:0 0 18px;
}

.feature-text p:first-of-type::first-letter{
  float:left;
  font-family:var(--serif);
  font-size:3.1em;
  line-height:.88;
  font-weight:700;
  color:var(--accent);
  padding:.06em .16em 0 0;
}
.feature-text p{
  color:var(--muted);
  font-size:.98rem;
  line-height:1.95;
}

.feature-list{
  list-style:none;
  margin:24px 0 0;
  padding:0;
}
.feature-list li{
  position:relative;
  padding:12px 0 12px 34px;
  font-size:.94rem;
  color:var(--ink-soft);
  border-bottom:1px solid var(--hair);
}
.feature-list li::before{
  content:"";
  position:absolute;
  left:0;
  top:24px;
  width:18px;
  height:1px;
  background:var(--accent);
}
.feature-list li:last-child{border-bottom:none;}

/* ---------------- 数据条 ---------------- */

.stats-bar{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:2px solid var(--rule);
  border-bottom:2px solid var(--rule);
  margin:clamp(32px,5vw,60px) 0 0;
  background:var(--paper-2);
}

.stat-item{
  padding:clamp(26px,3.4vw,44px) clamp(16px,2vw,26px);
  text-align:center;
  border-right:1px solid var(--hair);
}
.stat-item:last-child{border-right:none;}

.stat-number{
  display:block;
  font-family:var(--serif);
  font-size:clamp(2.05rem,4.4vw,3.5rem);
  font-weight:700;
  line-height:1;
  letter-spacing:-.01em;
  color:var(--accent);
  margin-bottom:12px;
}

.stat-label{
  display:block;
  font-size:.78rem;
  letter-spacing:.24em;
  color:var(--muted);
}

/* ---------------- 内容墙 ---------------- */

.content-wall{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:clamp(24px,3.4vw,44px);
  margin-top:clamp(30px,4vw,52px);
  counter-reset:wall;
}

.content-wall-item{
  counter-increment:wall;
  border-top:2px solid var(--rule);
  padding-top:20px;
  position:relative;
  transition:transform .5s var(--ease);
}
.content-wall-item:hover{transform:translateY(-5px);}

.content-wall-item::before{
  content:counter(wall,decimal-leading-zero);
  display:block;
  font-family:var(--serif);
  font-size:.82rem;
  font-weight:700;
  letter-spacing:.28em;
  color:var(--accent);
  margin-bottom:14px;
}

.content-wall-body h3{
  font-size:clamp(1.08rem,1.6vw,1.28rem);
  line-height:1.4;
  margin:0 0 12px;
}
.content-wall-body p{
  color:var(--muted);
  font-size:.94rem;
  line-height:1.92;
  margin:0 0 14px;
}
.content-wall-body a{
  font-size:.78rem;
  font-weight:600;
  letter-spacing:.22em;
  color:var(--accent);
  border-bottom:1px solid var(--accent-soft);
  padding-bottom:2px;
  transition:border-color .35s var(--ease);
}
.content-wall-body a:hover{border-bottom-color:var(--accent);}

/* ---------------- 问答 ---------------- */

.faq-list{
  margin-top:clamp(28px,4vw,48px);
  border-top:1px solid var(--rule);
}

.faq-item{
  border-bottom:1px solid var(--hair);
  transition:background .45s var(--ease);
}
.faq-item:hover{background:var(--paper-2);}

.faq-question{
  position:relative;
  display:block;
  padding:24px 56px 24px 0;
  font-family:var(--serif);
  font-size:clamp(1.02rem,1.5vw,1.18rem);
  font-weight:700;
  color:var(--ink);
  letter-spacing:.02em;
  line-height:1.5;
  cursor:pointer;
  transition:color .35s var(--ease);
}
.faq-question::after{
  content:"+";
  position:absolute;
  right:6px;
  top:50%;
  transform:translateY(-50%);
  font-family:var(--serif);
  font-size:1.5rem;
  font-weight:400;
  color:var(--accent);
  line-height:1;
  transition:transform .4s var(--ease);
}
.faq-item:hover .faq-question,
.faq-item.active .faq-question{color:var(--accent);}
.faq-item.active .faq-question::after{
  content:"−";
  transform:translateY(-50%) rotate(180deg);
}

.faq-answer{
  padding:0 56px 26px 0;
  color:var(--muted);
  font-size:.95rem;
  line-height:1.95;
  max-width:72ch;
}

/* ---------------- 横幅 ---------------- */

.cta-banner{
  position:relative;
  margin:clamp(30px,5vw,64px) 0;
  padding:clamp(40px,6vw,78px) clamp(24px,5vw,72px);
  background:var(--paper-3);
  border:1px solid var(--rule);
  text-align:center;
  overflow:hidden;
}
.cta-banner::before{
  content:"";
  position:absolute;
  inset:10px;
  border:1px solid rgba(22,18,16,.18);
  pointer-events:none;
}
.cta-banner h2{
  font-size:clamp(1.7rem,3.4vw,2.7rem);
  line-height:1.28;
  margin:0 0 16px;
  position:relative;
}
.cta-banner p{
  color:var(--ink-soft);
  max-width:56ch;
  margin:0 auto 30px;
  position:relative;
  font-size:.98rem;
  line-height:1.95;
}
.cta-banner .btn{position:relative;}

/* ---------------- 页脚 ---------------- */

.site-footer{
  margin-top:clamp(40px,6vw,90px);
  background:var(--paper-3);
  border-top:3px solid var(--rule);
  padding:clamp(42px,6vw,76px) 0 0;
}

.footer-grid{
  display:grid;
  grid-template-columns:1.7fr 1fr 1fr 1fr;
  gap:clamp(24px,4vw,52px);
  padding-bottom:clamp(34px,4vw,54px);
}

.footer-brand{min-width:0;}
.footer-brand .logo{
  margin:0 0 18px;
  font-size:1.24rem;
}
.footer-brand p{
  color:var(--muted);
  font-size:.92rem;
  line-height:1.95;
  max-width:34ch;
  margin:0;
}

.footer-col h4{
  font-family:var(--serif);
  font-size:.96rem;
  letter-spacing:.18em;
  margin:0 0 20px;
  padding-bottom:12px;
  border-bottom:1px solid var(--hair);
  color:var(--ink);
}
.footer-col ul{
  list-style:none;
  margin:0;
  padding:0;
}
.footer-col li{margin-bottom:10px;}
.footer-col a{
  font-size:.9rem;
  color:var(--muted);
  transition:color .35s var(--ease),padding-left .35s var(--ease);
}
.footer-col a:hover{
  color:var(--accent);
  padding-left:6px;
}

.footer-bottom{
  border-top:1px solid var(--hair);
  padding:22px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  font-size:.78rem;
  letter-spacing:.12em;
  color:var(--muted);
}

/* ---------------- 通用文字工具 ---------------- */

.text-accent{color:var(--accent);font-weight:600;}
.text-center{text-align:center;}
.text-center .section-title,
.text-center .section-desc{margin-left:auto;margin-right:auto;}
.text-center .section-label{justify-content:center;}
.mt-0{margin-top:0!important;}
.mb-0{margin-bottom:0!important;}

.seo-description{
  font-size:.88rem;
  line-height:2.05;
  color:var(--muted);
  max-width:80ch;
  padding:22px 0 0;
  border-top:1px solid var(--hair);
  letter-spacing:.01em;
}

blockquote{
  margin:clamp(24px,3vw,38px) 0;
  padding:6px 0 6px clamp(20px,3vw,34px);
  border-left:3px solid var(--accent);
  font-family:var(--serif);
  font-size:clamp(1.05rem,1.7vw,1.34rem);
  line-height:1.8;
  color:var(--ink);
  font-style:normal;
}
blockquote cite{
  display:block;
  margin-top:14px;
  font-family:var(--sans);
  font-size:.76rem;
  letter-spacing:.22em;
  color:var(--muted);
  font-style:normal;
}

/* ---------------- 响应式 ---------------- */

@media (max-width:1000px){
  .hero > .container{grid-template-columns:1fr;}
  .hero-image{box-shadow:14px 14px 0 -1px var(--accent-soft);}
  .hero-image img{aspect-ratio:16/10;}
  .feature-block{grid-template-columns:1fr;}
  .feature-block:nth-child(even) .feature-image{order:0;}
  .feature-image{box-shadow:12px 12px 0 -1px var(--paper-3);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .footer-brand{grid-column:1 / -1;}
}

@media (max-width:900px){
  .menu-toggle{display:block;}
  .nav-cta{display:none;}
  .main-nav{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:0;
    padding:10px clamp(20px,4.4vw,44px) 22px;
    background:var(--paper-2);
    border-bottom:2px solid var(--rule);
    box-shadow:0 22px 30px -22px rgba(22,18,16,.4);
  }
  .main-nav ul{
    flex-direction:column;
    align-items:stretch;
    gap:0;
  }
  .main-nav li{border-bottom:1px solid var(--hair);}
  .main-nav a{
    display:block;
    padding:15px 0;
    font-size:.95rem;
  }
  .main-nav a::after{display:none;}
  .main-nav.open,
  .site-header.nav-open .main-nav{display:flex;}
  .stats-bar{grid-template-columns:repeat(2,1fr);}
  .stat-item:nth-child(2){border-right:none;}
  .stat-item:nth-child(1),
  .stat-item:nth-child(2){border-bottom:1px solid var(--hair);}
}

@media (max-width:680px){
  body{font-size:15px;}
  .hero{padding-top:32px;}
  .hero-eyebrow{letter-spacing:.2em;font-size:.66rem;}
  .hero h1,.hero-title{font-size:clamp(1.95rem,8.5vw,2.6rem);line-height:1.18;}
  .hero-buttons{gap:10px;}
  .btn{width:100%;padding:15px 22px;}
  .hero-buttons .btn{width:100%;}
  .cards-grid{grid-template-columns:1fr;}
  .category-card{border-right:none;}
  .content-wall{grid-template-columns:1fr;}
  .stats-bar{grid-template-columns:1fr;}
  .stat-item{
    border-right:none;
    border-bottom:1px solid var(--hair);
  }
  .stat-item:last-child{border-bottom:none;}
  .footer-grid{grid-template-columns:1fr;gap:30px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;gap:8px;}
  .cta-banner::before{inset:6px;}
  .faq-question{padding-right:42px;font-size:1rem;}
  .faq-answer{padding-right:16px;}
  .logo-icon{width:36px;height:36px;flex:0 0 36px;font-size:.92rem;box-shadow:2px 2px 0 0 var(--ink);}
  .hero-image,
  .feature-image{box-shadow:none;}
}

@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms!important;transition-duration:.001ms!important;}
  html{scroll-behavior:auto;}
}