:root{
      --bg0:#fbf5ee;
      --bg1:#f3efe7;
      --card:#ffffff;
      --ink:#1f2328;
      --muted:#5b616b;
      --line:rgba(20,25,30,.10);
      --accent:#a33b2c;   /* 国潮朱 */
      --accent2:#1f4a7a;  /* 深海蓝 */
      --gold:#b8863b;     /* 暗金 */
      --shadow: 0 10px 30px rgba(19,24,29,.08);
      --radius:16px;
      --radius2:22px;
      --focus: 0 0 0 4px rgba(163,59,44,.16);
      --container: 1040px;
    }
    *{box-sizing:border-box}
    html,body{height:100%}
    body{
      margin:0;
      color:var(--ink);
      font-family: -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;
      background:
        radial-gradient(1200px 600px at 20% -10%, rgba(163,59,44,.16), transparent 60%),
        radial-gradient(1000px 500px at 90% 0%, rgba(31,74,122,.14), transparent 55%),
        linear-gradient(180deg, var(--bg0) 0%, var(--bg1) 70%, #ffffff 120%);
      overflow-x:hidden;
    }
    a{color:inherit; text-decoration:none}
    a:hover{color:var(--accent)}
    .container{
      max-width:var(--container);
      padding:0 20px;
      margin:0 auto;
    }
    .topbar{
      position:sticky;
      top:0;
      z-index:50;
      backdrop-filter: blur(10px);
      background: rgba(251,245,238,.72);
      border-bottom:1px solid rgba(20,25,30,.08);
    }
    .topbar-inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:12px 0;
      gap:14px;
    }
    .brand{
      display:flex;
      align-items:center;
      gap:12px;
      min-width: 140px;
    }
    .logo-badge{
      width:38px;height:38px;
      border-radius:12px;
      display:grid;
      place-items:center;
      background:
        linear-gradient(180deg, rgba(163,59,44,.14), rgba(163,59,44,.06)),
        rgba(255,255,255,.75);
      border:1px solid rgba(163,59,44,.25);
      box-shadow: 0 8px 18px rgba(163,59,44,.10);
      position:relative;
      overflow:hidden;
    }
    .logo-badge::before{
      content:"";
      position:absolute; inset:-1px;
      background: radial-gradient(18px 18px at 30% 25%, rgba(184,134,59,.35), transparent 60%);
      pointer-events:none;
    }
    .logo-badge span{
      position:relative;
      font-weight:900;
      color:var(--accent);
      letter-spacing:.5px;
      font-size:18px;
    }
    .brand-text{
      display:flex;
      flex-direction:column;
      line-height:1.1;
    }
    .brand-text strong{
      font-size:14px;
      letter-spacing:.2px;
    }
    .brand-text small{
      color:var(--muted);
      font-size:12px;
      margin-top:4px;
    }

    .nav{
      display:flex;
      align-items:center;
      gap:14px;
    }
    .nav a{
      font-size:13px;
      color:rgba(31,35,40,.85);
      padding:10px 10px;
      border-radius:12px;
      border:1px solid transparent;
      transition: background .18s ease, border-color .18s ease, transform .18s ease;
      white-space:nowrap;
    }
    .nav a:hover{
      background: rgba(255,255,255,.75);
      border-color: rgba(20,25,30,.10);
      transform: translateY(-1px);
    }
    .nav-cta{
      display:flex;
      align-items:center;
      gap:10px;
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:10px;
      padding:11px 14px;
      border-radius:14px;
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.7);
      color: rgba(31,35,40,.92);
      font-weight:700;
      font-size:13px;
      transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease, background .18s ease;
      box-shadow: 0 10px 20px rgba(31,35,40,.06);
      cursor:pointer;
      user-select:none;
    }
    .btn:focus{outline:none; box-shadow: var(--focus), 0 10px 20px rgba(31,35,40,.06)}
    .btn:hover{transform: translateY(-1px); border-color: rgba(163,59,44,.35); background:#fff}
    .btn-primary{
      border-color: rgba(163,59,44,.35);
      background: linear-gradient(180deg, rgba(163,59,44,.14), rgba(163,59,44,.07)), #fff;
    }
    .btn-primary .dot{
      width:10px;height:10px;border-radius:50%;
      background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.9), transparent 55%), var(--accent);
      box-shadow: 0 8px 18px rgba(163,59,44,.25);
    }
    .menu-btn{
      display:none;
      width:44px;height:44px;
      border-radius:14px;
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.7);
      box-shadow: 0 10px 20px rgba(31,35,40,.06);
      cursor:pointer;
    }
    .menu-btn:focus{outline:none; box-shadow: var(--focus), 0 10px 20px rgba(31,35,40,.06)}
    .menu-btn span{
      display:block; width:18px; height:2px; background: rgba(31,35,40,.75);
      margin:0 auto;
      position:relative;
    }
    .menu-btn span::before,.menu-btn span::after{
      content:""; position:absolute; left:0;
      width:18px; height:2px; background: rgba(31,35,40,.75);
      border-radius:2px;
    }
    .menu-btn span::before{top:-6px}
    .menu-btn span::after{top:6px}

    .mobile-panel{
      display:none;
      padding: 0 0 14px 0;
    }
    .mobile-links{
      display:flex;
      flex-direction:column;
      gap:10px;
      padding:12px;
      border-radius:18px;
      background: rgba(255,255,255,.7);
      border:1px solid rgba(20,25,30,.10);
      box-shadow: var(--shadow);
    }
    .mobile-links a{
      padding:12px 12px;
      border-radius:14px;
      border:1px solid rgba(20,25,30,.08);
      background: rgba(255,255,255,.65);
      font-weight:700;
      color: rgba(31,35,40,.9);
    }

    header.hero{
      padding: 26px 0 8px;
    }
    .hero-wrap{
      display:grid;
      grid-template-columns: 1.15fr .85fr;
      gap:18px;
      align-items:start;
    }
    .hero-card{
      background: linear-gradient(180deg, rgba(255,255,255,.78), rgba(255,255,255,.55));
      border:1px solid rgba(20,25,30,.10);
      border-radius: var(--radius2);
      padding: 22px 20px 18px;
      box-shadow: 0 18px 40px rgba(31,35,40,.08);
      position:relative;
      overflow:hidden;
    }
    .hero-card::after{
      content:"";
      position:absolute;
      right:-120px; top:-130px;
      width:340px; height:340px;
      background: radial-gradient(circle at 35% 35%, rgba(163,59,44,.25), transparent 60%);
      pointer-events:none;
    }
    .eyebrow{
      display:flex;
      align-items:center;
      gap:10px;
      color: rgba(31,35,40,.88);
      font-weight:800;
      font-size:13px;
      letter-spacing:.2px;
    }
    .eyebrow .sig{
      padding:6px 10px;
      border-radius:999px;
      border:1px solid rgba(163,59,44,.25);
      background: rgba(255,255,255,.65);
    }
    .hero h1{
      margin:12px 0 10px;
      font-size:34px;
      letter-spacing:-.6px;
      line-height:1.15;
    }
    .lead{
      margin:0;
      color: rgba(31,35,40,.78);
      font-size:15px;
      line-height:1.75;
      max-width: 62ch;
    }
    .hero-actions{
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:16px;
      align-items:center;
    }
    .pillrow{
      margin-top:16px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
    }
    .pill{
      display:inline-flex;
      align-items:center;
      gap:9px;
      padding:9px 11px;
      border-radius:999px;
      background: rgba(255,255,255,.65);
      border:1px solid rgba(20,25,30,.10);
      color: rgba(31,35,40,.86);
      font-weight:750;
      font-size:13px;
    }
    .pill i{
      width:10px;height:10px;border-radius:3px;
      background: linear-gradient(180deg, rgba(31,74,122,.35), rgba(31,74,122,.12));
      border:1px solid rgba(31,74,122,.35);
    }

    .side-panel{
      display:flex;
      flex-direction:column;
      gap:12px;
    }
    .mini-card{
      background: rgba(255,255,255,.7);
      border:1px solid rgba(20,25,30,.10);
      border-radius: var(--radius);
      padding: 14px 14px;
      box-shadow: 0 14px 30px rgba(31,35,40,.06);
      position:relative;
      overflow:hidden;
    }
    .mini-card::before{
      content:"";
      position:absolute;
      inset:-2px -2px auto -2px;
      height:72px;
      background: linear-gradient(90deg, rgba(184,134,59,.22), transparent 60%);
      pointer-events:none;
    }
    .mini-card h2{
      margin:0;
      font-size:14px;
      letter-spacing:.2px;
      position:relative;
    }
    .mini-card p{
      margin:8px 0 0;
      color: rgba(31,35,40,.75);
      line-height:1.65;
      font-size:13.5px;
      position:relative;
    }
    .image-wrap{
      border-radius: var(--radius);
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.55);
      overflow:hidden;
      box-shadow: 0 14px 30px rgba(31,35,40,.06);
    }
    .image-wrap .imgbox{
      padding: 12px;
      position:relative;
    }
    .imgbox img{
      width:100%;
      height:auto;
      display:block;
      border-radius: 14px;
      border:1px solid rgba(20,25,30,.08);
      background:#fff;
      box-shadow: 0 12px 26px rgba(31,35,40,.08);
      transform: translateY(0);
      transition: transform .25s ease;
    }
    .image-wrap:hover .imgbox img{transform: translateY(-2px)}
    .imgcap{
      padding: 0 12px 12px;
      color: rgba(31,35,40,.70);
      font-size:12.8px;
      line-height:1.6;
    }

    main{
      padding: 10px 0 34px;
    }
    .section{
      margin-top: 18px;
    }
    .section-title{
      display:flex;
      align-items:flex-end;
      justify-content:space-between;
      gap:14px;
      margin-bottom:12px;
    }
    .section-title h2{
      margin:0;
      font-size:18px;
      letter-spacing:-.2px;
    }
    .section-title .hint{
      color: var(--muted);
      font-size:13px;
      margin:0;
      line-height:1.3;
    }
    .toc{
      background: rgba(255,255,255,.65);
      border:1px solid rgba(20,25,30,.10);
      border-radius: var(--radius2);
      padding: 14px 14px;
      box-shadow: 0 14px 30px rgba(31,35,40,.06);
    }
    .toc-grid{
      display:grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap:10px;
      margin-top:10px;
    }
    .toc a{
      display:flex;
      flex-direction:column;
      gap:6px;
      padding:12px 12px;
      border-radius:16px;
      border:1px solid rgba(20,25,30,.08);
      background: rgba(255,255,255,.7);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
      min-height:68px;
    }
    .toc a:hover{
      transform: translateY(-2px);
      border-color: rgba(163,59,44,.28);
      background:#fff;
    }
    .toc a .k{
      font-weight:900;
      font-size:13.5px;
    }
    .toc a .d{
      font-size:12.5px;
      color: rgba(31,35,40,.7);
      line-height:1.45;
    }

    .content-grid{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap:14px;
      align-items:start;
    }
    .card{
      background: rgba(255,255,255,.66);
      border:1px solid rgba(20,25,30,.10);
      border-radius: var(--radius2);
      box-shadow: 0 18px 40px rgba(31,35,40,.07);
      padding: 16px 16px;
      position:relative;
      overflow:hidden;
    }
    .card::after{
      content:"";
      position:absolute;
      inset:auto -60px -80px auto;
      width:220px; height:220px;
      background: radial-gradient(circle at 30% 30%, rgba(31,74,122,.16), transparent 60%);
      pointer-events:none;
    }
    .card h3{
      margin:0;
      font-size:16px;
      letter-spacing:-.15px;
    }
    .card p{
      margin:10px 0 0;
      color: rgba(31,35,40,.75);
      line-height:1.8;
      font-size:14px;
      position:relative;
    }
    .list{
      margin:12px 0 0;
      padding-left:18px;
      color: rgba(31,35,40,.80);
      font-size:14px;
      line-height:1.85;
      position:relative;
    }
    .list li{margin:6px 0}

    .steps{
      display:grid;
      grid-template-columns: 1fr;
      gap:12px;
    }
    .step{
      display:flex;
      gap:12px;
      padding: 14px 14px;
      border-radius: var(--radius2);
      background: rgba(255,255,255,.65);
      border:1px solid rgba(20,25,30,.10);
      align-items:flex-start;
      box-shadow: 0 14px 30px rgba(31,35,40,.05);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .step:hover{transform: translateY(-2px); border-color: rgba(31,74,122,.25); background:#fff}
    .step .num{
      width:36px;height:36px;
      border-radius:14px;
      display:grid;
      place-items:center;
      font-weight:1000;
      color: var(--accent2);
      border:1px solid rgba(31,74,122,.25);
      background: linear-gradient(180deg, rgba(31,74,122,.10), rgba(31,74,122,.04));
      flex:0 0 auto;
      position:relative;
      overflow:hidden;
    }
    .step .num::after{
      content:"";
      position:absolute;
      inset:-10px -10px auto auto;
      width:44px; height:44px;
      background: radial-gradient(circle at 30% 30%, rgba(184,134,59,.28), transparent 60%);
    }
    .step .body h3{
      margin:0;
      font-size:15px;
      letter-spacing:-.1px;
    }
    .step .body p{
      margin:8px 0 0;
      color: rgba(31,35,40,.74);
      line-height:1.75;
      font-size:13.8px;
    }

    .facts{
      display:grid;
      grid-template-columns: 1.1fr .9fr;
      gap:14px;
      align-items:start;
    }
    .data-grid{
      display:grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap:12px;
      margin-top:12px;
      position:relative;
    }
    .stat{
      padding: 12px 12px;
      border-radius: 18px;
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.62);
    }
    .stat b{
      display:block;
      font-size:18px;
      letter-spacing:-.2px;
      color: rgba(31,35,40,.92);
    }
    .stat span{
      display:block;
      margin-top:6px;
      font-size:12.8px;
      color: rgba(31,35,40,.70);
      line-height:1.4;
    }
    .quote{
      padding: 16px 16px;
      border-radius: var(--radius2);
      background: linear-gradient(180deg, rgba(163,59,44,.10), rgba(255,255,255,.62));
      border:1px solid rgba(163,59,44,.20);
      position:relative;
      overflow:hidden;
      box-shadow: 0 18px 40px rgba(163,59,44,.07);
    }
    .quote::before{
      content:"“";
      position:absolute;
      left:14px; top:-18px;
      font-size:74px;
      color: rgba(163,59,44,.18);
      font-weight:1000;
      line-height:1;
      pointer-events:none;
    }
    .quote p{
      margin:0;
      color: rgba(31,35,40,.80);
      line-height:1.85;
      font-size:14px;
      position:relative;
      padding-top:6px;
    }
    .quote .by{
      margin-top:10px;
      color: rgba(31,35,40,.72);
      font-size:13px;
      font-weight:800;
      display:flex;
      align-items:center;
      gap:10px;
      position:relative;
    }
    .quote .by i{
      width:10px;height:10px;border-radius:3px;background: var(--accent2);
      box-shadow: 0 10px 20px rgba(31,74,122,.25);
      opacity:.9;
    }

    .faq{
      background: rgba(255,255,255,.60);
      border:1px solid rgba(20,25,30,.10);
      border-radius: var(--radius2);
      padding: 14px 14px;
      box-shadow: 0 18px 40px rgba(31,35,40,.06);
    }
    .faq-item{
      border-top:1px solid rgba(20,25,30,.10);
      padding: 12px 0;
    }
    .faq-item:first-child{border-top:none; padding-top:0}
    details.faq-qa{
      border-radius:16px;
      background: rgba(255,255,255,.55);
      border:1px solid rgba(20,25,30,.08);
      padding: 12px 12px;
      transition: border-color .18s ease, background .18s ease, transform .18s ease;
    }
    details.faq-qa[open]{background:#fff; border-color: rgba(163,59,44,.25)}
    details.faq-qa summary{
      cursor:pointer;
      list-style:none;
      display:flex;
      align-items:flex-start;
      justify-content:space-between;
      gap:12px;
      font-weight:900;
      font-size:14px;
      color: rgba(31,35,40,.92);
    }
    details.faq-qa summary::-webkit-details-marker{display:none}
    .chev{
      width:24px;height:24px;border-radius:10px;
      border:1px solid rgba(20,25,30,.10);
      display:grid; place-items:center;
      background: rgba(255,255,255,.7);
      flex:0 0 auto;
      transition: transform .2s ease;
      margin-top:-2px;
    }
    details[open] .chev{transform: rotate(180deg); border-color: rgba(163,59,44,.28)}
    .faq-answer{
      margin-top:10px;
      color: rgba(31,35,40,.76);
      line-height:1.85;
      font-size:14px;
    }
    .conclusion{
      display:flex;
      gap:14px;
      flex-wrap:wrap;
      align-items:flex-start;
      justify-content:space-between;
    }
    .conclusion .box{
      flex:1 1 520px;
      min-width: 280px;
      padding: 16px 16px;
      border-radius: var(--radius2);
      background: rgba(255,255,255,.62);
      border:1px solid rgba(20,25,30,.10);
      box-shadow: 0 18px 40px rgba(31,35,40,.06);
    }
    .conclusion h2{
      margin:0;
      font-size:16px;
      letter-spacing:-.15px;
    }
    .conclusion p{
      margin:10px 0 0;
      color: rgba(31,35,40,.76);
      line-height:1.85;
      font-size:14px;
    }
    .inner-links{
      flex:0 0 320px;
      min-width: 260px;
      padding: 16px 16px;
      border-radius: var(--radius2);
      background: linear-gradient(180deg, rgba(31,74,122,.10), rgba(255,255,255,.58));
      border:1px solid rgba(31,74,122,.18);
      box-shadow: 0 18px 40px rgba(31,74,122,.06);
    }
    .inner-links h3{
      margin:0;
      font-size:15px;
      letter-spacing:-.12px;
    }
    .inner-links .links{
      margin-top:12px;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .link-item{
      padding: 12px 12px;
      border-radius:16px;
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.65);
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
    }
    .link-item:hover{transform: translateY(-2px); border-color: rgba(31,74,122,.25); background:#fff}
    .link-item b{
      display:block;
      font-size:13.8px;
      color: rgba(31,35,40,.92);
      line-height:1.35;
    }
    .link-item span{
      display:block;
      margin-top:6px;
      font-size:12.6px;
      color: rgba(31,35,40,.70);
      line-height:1.4;
    }

    .keywords-bar{
      margin-top: 12px;
      display:flex;
      flex-wrap:wrap;
      gap:10px;
      align-items:center;
    }
    .kw{
      padding: 8px 10px;
      border-radius: 999px;
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.65);
      font-size:12.8px;
      color: rgba(31,35,40,.78);
      font-weight:800;
    }

    footer{
      background: #fff;
      border-top:1px solid rgba(20,25,30,.10);
      margin-top: 18px;
      padding: 16px 0 22px;
    }
    .footer-inner{
      display:flex;
      justify-content:space-between;
      align-items:flex-start;
      gap:14px;
      flex-wrap:wrap;
    }
    .foot-left{
      flex:1 1 440px;
      min-width: 280px;
    }
    .foot-left strong{
      display:flex;
      align-items:center;
      gap:10px;
      font-size:14px;
      letter-spacing:.2px;
    }
    .foot-left p{
      margin:10px 0 0;
      color: rgba(31,35,40,.74);
      font-size:13.5px;
      line-height:1.8;
    }
    .foot-right{
      flex:0 0 360px;
      min-width: 280px;
      background: rgba(243,239,231,.7);
      border:1px solid rgba(20,25,30,.10);
      border-radius: var(--radius2);
      padding: 14px 14px;
    }
    .foot-right h3{
      margin:0;
      font-size:14.5px;
      letter-spacing:-.12px;
    }
    .foot-right .grid{
      margin-top:12px;
      display:grid;
      grid-template-columns: 1fr;
      gap:10px;
    }
    .foot-chip{
      display:flex;
      align-items:flex-start;
      gap:10px;
      padding: 12px 12px;
      border-radius: 16px;
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.65);
    }
    .foot-chip i{
      width:12px;height:12px;border-radius:4px;background: rgba(163,59,44,.18);
      border:1px solid rgba(163,59,44,.35);
      margin-top:4px;
      flex:0 0 auto;
    }
    .foot-chip b{
      font-size:13.3px;
      line-height:1.35;
      display:block;
    }
    .foot-chip span{
      display:block;
      color: rgba(31,35,40,.72);
      font-size:12.7px;
      line-height:1.5;
      margin-top:6px;
    }

    .copyright{
      margin-top:14px;
      color: rgba(31,35,40,.65);
      font-size:12.6px;
      line-height:1.6;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      flex-wrap:wrap;
    }
    .to-top{
      display:inline-flex;
      align-items:center;
      gap:10px;
      padding:10px 12px;
      border-radius: 14px;
      border:1px solid rgba(20,25,30,.10);
      background: rgba(255,255,255,.7);
      cursor:pointer;
      transition: transform .18s ease, border-color .18s ease, background .18s ease;
      font-weight:900;
      color: rgba(31,35,40,.85);
    }
    .to-top:hover{transform: translateY(-2px); border-color: rgba(163,59,44,.28); background:#fff}

    @media (max-width: 920px){
      .hero-wrap{grid-template-columns: 1fr; }
      .toc-grid{grid-template-columns: 1fr 1fr}
      .content-grid{grid-template-columns: 1fr}
      .facts{grid-template-columns: 1fr}
      .inner-links{flex:1 1 auto}
      .nav{display:none}
      .menu-btn{display:inline-flex; align-items:center; justify-content:center}
      .mobile-panel{display:block}
    }
    @media (max-width: 520px){
      .hero h1{font-size:26px}
      .toc-grid{grid-template-columns: 1fr}
      .topbar-inner{padding:10px 0}
    }

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