:root{
    --ink:#22140c;
    --ink-2:#4b352a;
    --muted:#7c6255;
    --orange:#ff5c16;
    --orange-2:#ff9a1f;
    --orange-deep:#dd3f08;
    --line:rgba(255,92,22,.18);
    --line-soft:rgba(255,92,22,.10);
    --radius:18px;
  }
  *{box-sizing:border-box;}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    color:var(--ink);
    font-size:16px;
    line-height:1.7;
    background-color:#fff7f0;
    background-image:
      radial-gradient(900px 520px at 8% -8%, rgba(255,154,31,.22), transparent 60%),
      radial-gradient(760px 480px at 96% 4%, rgba(255,92,22,.15), transparent 62%),
      radial-gradient(900px 620px at 50% 104%, rgba(255,176,80,.20), transparent 66%);
    background-repeat:no-repeat;
    -webkit-font-smoothing:antialiased;
  }
  h1,h2,h3,h4{margin:0;line-height:1.28;letter-spacing:-.3px;}
  p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}
  a{color:inherit;}
  .container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px;}
  .section{padding:72px 0;}
  section[id]{scroll-margin-top:88px;}

  /* 顶部导航 */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,250,245,.92);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line-soft);
  }
  .nav-bar{
    display:flex;align-items:center;justify-content:space-between;
    gap:16px;flex-wrap:wrap;
    min-height:70px;padding-top:8px;padding-bottom:8px;
  }
  .brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:800;font-size:18px;color:var(--ink);}
  .ai-page-logo{width:38px;display:block;}
  .brand-name{white-space:nowrap;}
  .nav-wrap{display:block;}
  .nav-links{display:flex;align-items:center;gap:0;flex-wrap:nowrap;}
  .nav-links a{
    display:block;padding:8px 12px;border-radius:9px;
    font-size:15px;font-weight:600;color:var(--ink-2);text-decoration:none;
    transition:color .2s ease,background .2s ease;
    white-space:nowrap;
  }
  .nav-links a:hover{color:var(--orange-deep);background:rgba(255,92,22,.09);}
  .nav-cta{padding:11px 20px;font-size:14px;}
  .nav-toggle{
    display:none;width:42px;height:42px;border-radius:11px;
    border:1px solid var(--line);background:#fff;cursor:pointer;
    flex-direction:column;align-items:center;justify-content:center;gap:4px;
    padding:0;
  }
  .nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink-2);transition:background .2s;}
  .nav-toggle:hover span{background:var(--orange-deep);}

  /* 按钮 */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 26px;border-radius:12px;border:1px solid transparent;
    font-size:15px;font-weight:700;text-decoration:none;cursor:pointer;
    transition:transform .18s ease,box-shadow .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
  }
  .btn-primary{background:linear-gradient(135deg,#ff8a1f,#ff4d0d);color:#fff;box-shadow:0 12px 26px -12px rgba(255,77,13,.8);}
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 34px -12px rgba(255,77,13,.85);}
  .btn-primary:active{transform:translateY(0) scale(.985);}
  .btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
  .btn-ghost:hover{color:var(--orange-deep);border-color:rgba(255,92,22,.42);transform:translateY(-2px);}
  .btn-ghost:active{transform:translateY(0) scale(.985);}

  /* 通用标题 */
  .eyebrow{
    display:inline-block;margin-bottom:14px;padding:5px 13px;border-radius:999px;
    font-size:13px;font-weight:800;letter-spacing:1.6px;
    color:var(--orange-deep);background:rgba(255,92,22,.11);
  }
  .section-head{max-width:780px;margin-bottom:34px;}
  .section-head h2{font-size:clamp(24px,3vw,34px);margin-bottom:12px;}
  .section-head p{color:var(--ink-2);font-size:15.5px;}

  /* 首屏 */
  .hero{position:relative;overflow:hidden;padding:64px 0 56px;}
  .hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:linear-gradient(rgba(255,92,22,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,92,22,.055) 1px,transparent 1px);
    background-size:46px 46px;
    -webkit-mask-image:radial-gradient(circle at 50% 34%,#000,transparent 74%);
    mask-image:radial-gradient(circle at 50% 34%,#000,transparent 74%);
  }
  .hero::after{
    content:"";position:absolute;top:-160px;right:-120px;width:420px;height:420px;border-radius:50%;
    background:radial-gradient(circle,rgba(255,120,30,.34),transparent 68%);
    pointer-events:none;filter:blur(6px);
  }
  .hero .container{position:relative;z-index:2;}
  .hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;}
  .hero h1{font-size:clamp(30px,4.4vw,52px);margin-bottom:18px;}
  .hero h1 em{font-style:normal;color:var(--orange-deep);}
  .hero-desc{color:var(--ink-2);font-size:16.5px;max-width:560px;margin-bottom:28px;}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
  .hero-note{margin-top:16px;font-size:13.5px;color:var(--muted);}
  .hero-panel{
    background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;
    box-shadow:0 30px 70px -40px rgba(221,63,8,.75);
  }
  .hero-panel-head{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:18px;}
  .hero-panel-head strong{font-size:16px;}
  .hero-panel-tag{font-size:12px;font-weight:800;color:var(--orange-deep);background:rgba(255,92,22,.12);padding:4px 10px;border-radius:999px;}
  .flow-item{display:flex;gap:14px;align-items:flex-start;padding:13px 0;border-bottom:1px dashed rgba(255,92,22,.16);}
  .flow-item:last-of-type{border-bottom:0;}
  .flow-num{
    flex:0 0 34px;height:34px;border-radius:10px;display:grid;place-items:center;
    font-size:13px;font-weight:800;color:#fff;background:linear-gradient(135deg,#ff9a1f,#ff4d0d);
  }
  .flow-text strong{display:block;font-size:15px;margin-bottom:2px;}
  .flow-text span{font-size:13.5px;color:var(--muted);}
  .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;}
  .chip{
    font-size:12.5px;font-weight:600;color:var(--ink-2);
    background:rgba(255,92,22,.08);border:1px solid rgba(255,92,22,.14);
    padding:5px 11px;border-radius:999px;
  }

  /* 数据指标 */
  .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px;}
  .metric{
    background:#fff;border:1px solid var(--line-soft);border-radius:16px;padding:20px;
    box-shadow:0 16px 36px -30px rgba(221,63,8,.7);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .metric:hover{transform:translateY(-4px);border-color:var(--line);box-shadow:0 24px 46px -30px rgba(221,63,8,.75);}
  .metric strong{display:block;font-size:26px;color:var(--orange-deep);letter-spacing:-.5px;margin-bottom:4px;}
  .metric span{font-size:13.5px;color:var(--ink-2);}

  /* 卡片网格 */
  .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;align-items:start;}
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start;}
  .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;align-items:start;}
  .card{
    background:#fff;border:1px solid var(--line-soft);border-radius:var(--radius);padding:24px;
    box-shadow:0 16px 36px -30px rgba(221,63,8,.7);
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .card:hover{transform:translateY(-4px);border-color:var(--line);box-shadow:0 26px 50px -30px rgba(221,63,8,.8);}
  .card h3{font-size:17px;margin-bottom:10px;}
  .card p{font-size:14.5px;color:var(--ink-2);}

  /* 关于我们 */
  .about-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start;}
  .about-lead{font-size:15.5px;color:var(--ink-2);margin-bottom:20px;}
  .ability-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
  .ability{
    display:flex;gap:10px;align-items:flex-start;
    background:#fff;border:1px solid var(--line-soft);border-radius:14px;padding:14px 16px;
    font-size:14.5px;font-weight:600;color:var(--ink);
    transition:border-color .25s ease,transform .25s ease;
  }
  .ability:hover{border-color:var(--line);transform:translateY(-3px);}
  .dot{flex:0 0 8px;height:8px;border-radius:50%;margin-top:8px;background:linear-gradient(135deg,#ff9a1f,#ff4d0d);}
  .about-aside{background:linear-gradient(160deg,#fff,#fff4ea);border:1px solid var(--line);border-radius:20px;padding:26px;}
  .about-aside h3{font-size:18px;margin-bottom:12px;}
  .about-aside p{font-size:14.5px;color:var(--ink-2);margin-bottom:16px;}
  .tag-row{display:flex;flex-wrap:wrap;gap:8px;}

  /* 图文 */
  .figure{border-radius:16px;overflow:hidden;border:1px solid var(--line-soft);background:#fff6ef;}
  .figure img{display:block;width:100%;height:100%;object-fit:cover;}
  .ratio-16-10{aspect-ratio:16/10;}
  .ratio-1-1{aspect-ratio:1/1;}
  .figure-cap{padding:12px 14px;font-size:13.5px;color:var(--ink-2);background:#fff;border-top:1px solid var(--line-soft);}

  /* 行业方案 */
  .solution-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:26px;align-items:start;}
  .solution-list{display:grid;gap:14px;}
  .solution-item{
    background:#fff;border:1px solid var(--line-soft);border-left:4px solid rgba(255,92,22,.55);
    border-radius:14px;padding:16px 18px;
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .solution-item:hover{transform:translateX(4px);border-left-color:var(--orange);box-shadow:0 18px 36px -30px rgba(221,63,8,.8);}
  .solution-item strong{display:block;font-size:15.5px;margin-bottom:4px;}
  .solution-item span{font-size:14px;color:var(--ink-2);}

  /* 流程 */
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
  .step{
    position:relative;background:#fff;border:1px solid var(--line-soft);border-radius:16px;padding:22px;
    transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
  }
  .step:hover{transform:translateY(-4px);border-color:var(--line);box-shadow:0 24px 46px -30px rgba(221,63,8,.8);}
  .step-num{
    display:inline-grid;place-items:center;width:34px;height:34px;border-radius:10px;
    font-size:14px;font-weight:800;color:#fff;background:linear-gradient(135deg,#ff9a1f,#ff4d0d);margin-bottom:12px;
  }
  .step h3{font-size:16px;margin-bottom:8px;}
  .step p{font-size:14.5px;color:var(--ink-2);}

  /* 评测 */
  .score-bar{
    display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:26px;
  }
  .score-card{
    background:linear-gradient(150deg,#fff,#fff2e5);
    border:1px solid var(--line);border-radius:18px;padding:24px;text-align:center;
    transition:transform .25s ease,box-shadow .25s ease;
  }
  .score-card:hover{transform:translateY(-4px);box-shadow:0 26px 50px -32px rgba(221,63,8,.8);}
  .stars{font-size:20px;letter-spacing:4px;color:var(--orange);margin-bottom:8px;}
  .score-card strong{display:block;font-size:12px;letter-spacing:1.5px;color:var(--muted);margin-bottom:6px;}
  .score-card b{font-size:34px;color:var(--orange-deep);letter-spacing:-1px;}
  .score-card b i{font-size:15px;font-style:normal;color:var(--muted);margin-left:4px;}

  .table-wrap{overflow-x:auto;border:1px solid var(--line-soft);border-radius:16px;background:#fff;}
  table{width:100%;border-collapse:collapse;min-width:720px;font-size:14.5px;}
  thead th{
    text-align:left;padding:15px 18px;font-size:13.5px;letter-spacing:.5px;
    color:var(--ink);background:#fff4ea;border-bottom:1px solid var(--line);
  }
  tbody td{padding:14px 18px;border-bottom:1px solid rgba(255,92,22,.08);color:var(--ink-2);}
  tbody tr:last-child td{border-bottom:0;}
  tbody td:first-child{font-weight:700;color:var(--ink);}
  tbody td:nth-child(2){color:var(--orange-deep);font-weight:700;}
  tbody tr:hover td{background:#fffaf5;}

  /* Token 比价 */
  .token-note{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:22px;}
  .token-note div{
    background:#fff;border:1px solid var(--line-soft);border-radius:14px;padding:16px 18px;
    font-size:14px;color:var(--ink-2);
  }
  .token-note strong{display:block;font-size:15px;color:var(--ink);margin-bottom:4px;}
  .table-hint{margin-top:14px;font-size:13.5px;color:var(--muted);}

  /* 表单 */
  .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:start;}
  .lead-form{
    background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;
    box-shadow:0 30px 60px -42px rgba(221,63,8,.9);
    display:grid;grid-template-columns:1fr 1fr;gap:16px;
  }
  .field{display:flex;flex-direction:column;gap:7px;}
  .field.full{grid-column:1/-1;}
  .field label{font-size:13.5px;font-weight:700;color:var(--ink-2);}
  .field input,.field select,.field textarea{
    width:100%;padding:12px 14px;border-radius:11px;border:1px solid rgba(255,92,22,.22);
    background:#fffdfb;color:var(--ink);font-size:14.5px;font-family:inherit;
    transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  }
  .field textarea{resize:vertical;min-height:110px;}
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,92,22,.14);background:#fff;
  }
  .form-submit{grid-column:1/-1;display:flex;flex-wrap:wrap;gap:12px;align-items:center;}
  .form-submit .btn{flex:1 1 220px;}
  .form-tip{grid-column:1/-1;font-size:13px;color:var(--muted);}
  .perk-list{display:grid;gap:12px;margin-top:20px;}
  .perk{
    display:flex;gap:10px;align-items:flex-start;background:rgba(255,255,255,.75);
    border:1px solid var(--line-soft);border-radius:13px;padding:14px 16px;font-size:14.5px;color:var(--ink-2);
  }

  /* 评论 */
  .review{display:flex;flex-direction:column;gap:14px;}
  .review-head{display:flex;align-items:center;gap:12px;}
  .avatar{
    flex:0 0 42px;width:42px;height:42px;border-radius:50%;
    display:grid;place-items:center;font-size:16px;font-weight:800;color:#fff;
    background:linear-gradient(135deg,#ff9a1f,#ff4d0d);
  }
  .review-head strong{display:block;font-size:15px;}
  .review-head span{font-size:13px;color:var(--muted);}
  .review p{font-size:14.5px;color:var(--ink-2);}

  /* 帮助中心 */
  .help-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:30px;}
  .link-more{
    display:inline-block;margin-top:12px;font-size:14px;font-weight:700;
    color:var(--orange-deep);text-decoration:none;transition:transform .2s ease;
  }
  .link-more:hover{transform:translateX(3px);}

  /* FAQ */
  .faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;align-items:start;}
  .faq-item{
    background:#fff;border:1px solid var(--line-soft);border-radius:14px;padding:2px 18px;
    transition:border-color .25s ease,box-shadow .25s ease;
  }
  .faq-item[open]{border-color:rgba(255,92,22,.4);box-shadow:0 18px 36px -30px rgba(221,63,8,.9);}
  .faq-item summary{
    list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:15px 0;
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary h3{font-size:15.5px;font-weight:700;margin:0;}
  .faq-icon{
    flex:0 0 24px;width:24px;height:24px;border-radius:50%;
    display:grid;place-items:center;font-size:15px;font-weight:800;line-height:1;
    color:var(--orange-deep);background:rgba(255,92,22,.13);
    transition:transform .25s ease,background .25s ease,color .25s ease;
  }
  .faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--orange);color:#fff;}
  .faq-answer{padding:0 0 16px;font-size:14.5px;color:var(--ink-2);}

  /* 百科 */
  .term-card h3{font-size:16px;}
  .term-card p{font-size:14px;}

  /* 文章 */
  .article-list{display:grid;gap:14px;}
  .article-item{
    display:flex;flex-direction:column;gap:6px;
    background:#fff;border:1px solid var(--line-soft);border-radius:16px;padding:18px 20px;
    transition:transform .25s ease,border-color .25s ease,box-shadow .25s ease;
  }
  .article-item:hover{transform:translateX(4px);border-color:var(--line);box-shadow:0 20px 40px -32px rgba(221,63,8,.9);}
  .article-cat{font-size:12.5px;font-weight:800;color:var(--orange-deep);letter-spacing:1px;}
  .article-item a{font-size:16px;font-weight:700;color:var(--ink);text-decoration:none;}
  .article-item a:hover{color:var(--orange-deep);}
  .article-item span.desc{font-size:14px;color:var(--muted);}

  /* 加盟 */
  .partner-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:start;}
  .partner-list{display:grid;gap:14px;}

  /* 联系 */
  .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:26px;align-items:start;}
  .contact-list{display:grid;gap:12px;}
  .contact-row{
    display:flex;gap:12px;align-items:flex-start;
    background:#fff;border:1px solid var(--line-soft);border-radius:14px;padding:14px 18px;
  }
  .contact-row strong{display:block;font-size:13px;color:var(--muted);font-weight:700;margin-bottom:2px;}
  .contact-row span{font-size:15px;font-weight:600;color:var(--ink);word-break:break-all;}
  .qr-card{
    background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;text-align:center;
    box-shadow:0 26px 56px -40px rgba(221,63,8,.9);
  }
  .qr-card .figure{max-width:230px;margin:0 auto 14px;}
  .qr-card p{font-size:14px;color:var(--ink-2);}

  /* 页脚 */
  .site-footer{
    background:#2a1a12;color:#f6e9e0;padding:44px 0 26px;margin-top:0;
  }
  .footer-top{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start;}
  .footer-brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:#fff;margin-bottom:12px;}
  .footer-brand .ai-page-logo{width:34px;}
  .footer-desc{font-size:14px;color:#cbb3a5;max-width:420px;margin-bottom:14px;}
  .footer-mail{font-size:14px;color:#ffb27a;text-decoration:none;}
  .footer-mail:hover{text-decoration:underline;}
  .footer-links-title{font-size:14px;font-weight:800;color:#fff;margin-bottom:12px;letter-spacing:1px;}
  .friend-links{display:flex;flex-wrap:wrap;gap:10px 18px;}
  .friend-links a{font-size:14px;color:#ffb27a;text-decoration:none;transition:color .2s ease;}
  .friend-links a:hover{color:#fff;}
  .footer-bottom{
    margin-top:30px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);
    display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;
  }
  .footer-bottom p{font-size:13px;color:#bda292;}

  /* 浮动按钮 */
  .float-tools{position:fixed;right:18px;bottom:22px;z-index:70;display:flex;flex-direction:column;gap:10px;}
  .float-btn{
    width:46px;height:46px;border-radius:14px;border:1px solid rgba(255,92,22,.25);
    background:#fff;color:var(--orange-deep);
    display:grid;place-items:center;font-size:13px;font-weight:800;text-decoration:none;cursor:pointer;
    box-shadow:0 14px 30px -16px rgba(221,63,8,.85);
    transition:transform .2s ease,background .2s ease,color .2s ease;
  }
  .float-btn:hover{transform:translateY(-3px);background:linear-gradient(135deg,#ff9a1f,#ff4d0d);color:#fff;}
  #toTop{opacity:0;visibility:hidden;transform:translateY(10px);}
  #toTop.show{opacity:1;visibility:visible;transform:translateY(0);}

  /* 滚动渐入 */
  .reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease;}
  .reveal.in{opacity:1;transform:none;}

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    .reveal{opacity:1;transform:none;transition:none;}
    .card,.metric,.step,.article-item,.solution-item,.ability{transition:none;}
  }

  /* 响应式 */
  @media (max-width:1080px){
    .nav-toggle{display:flex;}
    .nav-wrap{display:none;flex-basis:100%;order:3;}
    .nav-wrap.open{display:block;}
    .nav-links{flex-direction:column;align-items:stretch;padding:6px 0 14px;}
    .nav-links a{padding:12px 4px;border-radius:0;border-bottom:1px dashed rgba(255,92,22,.16);font-size:15.5px;}
    .nav-links li:last-child a{border-bottom:0;}
    .nav-cta{padding:9px 16px;font-size:13.5px;}
    .hero-grid{grid-template-columns:1fr;gap:34px;}
    .about-grid,.solution-grid,.form-grid,.partner-grid,.contact-grid,.footer-top{grid-template-columns:1fr;}
    .grid-3,.grid-4,.steps,.score-bar,.help-grid,.token-note{grid-template-columns:repeat(2,1fr);}
    .faq-grid{grid-template-columns:1fr;}
    .metrics{grid-template-columns:repeat(2,1fr);}
  }
  @media (max-width:720px){
    .section{padding:54px 0;}
    .hero{padding:44px 0 40px;}
    .grid-2,.grid-3,.grid-4,.steps,.score-bar,.help-grid,.token-note,.metrics,.ability-list{grid-template-columns:1fr;}
    .lead-form{grid-template-columns:1fr;padding:20px;}
    .container{padding:0 18px;}
    .nav-cta{display:none;}
    .hero-actions .btn{width:100%;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
  }