:root{
    --rose:#e0186f;
    --rose-deep:#a80d53;
    --rose-mid:#f0459a;
    --rose-soft:#fff0f7;
    --line:#f5d3e3;
    --ink:#211224;
    --ink-2:#5c4a61;
    --radius:18px;
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    font-family:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    color:var(--ink);
    line-height:1.7;
    background:
      radial-gradient(980px 520px at 88% -6%, #ffd9ea 0%, rgba(255,255,255,0) 62%),
      radial-gradient(880px 460px at -8% 14%, #ffe7f3 0%, rgba(255,255,255,0) 60%),
      linear-gradient(180deg,#fff8fb 0%,#fff3f8 45%,#fff9fc 100%);
  }
  img{max-width:100%}
  a{color:var(--rose-deep)}
  .container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
  .section{padding:70px 0}
  .section-alt{
    background:linear-gradient(180deg,rgba(255,240,247,.92) 0%,rgba(255,249,252,.55) 100%);
    border-top:1px solid #fbe3ee;
    border-bottom:1px solid #fbe3ee;
  }
  .eyebrow{
    display:inline-block;
    font-size:13px;
    letter-spacing:2px;
    font-weight:700;
    color:var(--rose-deep);
    background:#fff0f7;
    border:1px solid var(--line);
    padding:5px 14px;
    border-radius:999px;
  }
  h1,h2,h3{margin:0;line-height:1.3;letter-spacing:.4px}
  h2{font-size:clamp(23px,3vw,33px);margin:16px 0 12px}
  h3{font-size:18px}
  .section-head{max-width:780px;margin:0 auto 38px;text-align:center}
  .section-head p{margin:0;color:var(--ink-2);font-size:15.5px}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;
    text-decoration:none;border:1px solid transparent;cursor:pointer;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
    white-space:nowrap;
  }
  .btn:active{transform:translateY(1px) scale(.99)}
  .btn-primary{
    background:linear-gradient(135deg,#f0469b,#c00f5f);
    color:#fff;
    box-shadow:0 12px 24px rgba(200,20,100,.26);
  }
  .btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(200,20,100,.34)}
  .btn-ghost{background:#fff;color:var(--rose-deep);border-color:#f3b6d3}
  .btn-ghost:hover{background:#fff2f8;transform:translateY(-2px)}
  .btn-light{background:#fff;color:var(--rose-deep);box-shadow:0 10px 22px rgba(80,10,45,.18)}
  .btn-light:hover{transform:translateY(-2px)}
  .btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.7)}
  .btn-outline-light:hover{background:rgba(255,255,255,.16);transform:translateY(-2px)}

  /* header */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(255,255,255,.93);
    backdrop-filter:blur(10px);
    border-bottom:1px solid var(--line);
  }
  .header-inner{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    min-height:68px;
  }
  .brand{
    display:flex;align-items:center;gap:10px;
    text-decoration:none;color:var(--ink);font-weight:800;font-size:18px;
    flex-shrink:0;
  }
  .ai-page-logo{width:40px;display:block;object-fit:contain}
  .site-nav{min-width:0}
  .nav-links{
    display:flex;align-items:center;justify-content:flex-end;
    gap:0;list-style:none;margin:0;padding:0;
  }
  .nav-links a{
    display:block;padding:8px 11px;font-size:14px;
    color:#3d2a44;text-decoration:none;border-radius:8px;
    white-space:nowrap;transition:color .2s ease,background .2s ease;
  }
  .nav-links a:hover{color:var(--rose-deep);background:var(--rose-soft)}
  .header-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
  .header-cta .btn{padding:10px 20px;font-size:14px}
  .nav-toggle{
    display:none;width:42px;height:38px;border-radius:10px;
    border:1px solid var(--line);background:#fff;color:var(--rose-deep);
    font-size:16px;cursor:pointer;align-items:center;justify-content:center;
  }

  /* hero */
  .hero{
    position:relative;overflow:hidden;
    padding:56px 0 46px;
    background:
      radial-gradient(720px 400px at 84% 4%, #ffd7ea 0%, rgba(255,255,255,0) 66%),
      linear-gradient(180deg,#fff6fb 0%,#fffaff 100%);
  }
  .hero::before{
    content:"";position:absolute;inset:0;pointer-events:none;
    background-image:
      linear-gradient(rgba(224,24,111,.055) 1px,transparent 1px),
      linear-gradient(90deg,rgba(224,24,111,.055) 1px,transparent 1px);
    background-size:48px 48px;
  }
  .hero .container{position:relative;z-index:1}
  .hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:44px;align-items:start}
  .hero h1{font-size:clamp(29px,4.2vw,48px);line-height:1.2;margin:18px 0 16px}
  .hero h1 span{color:var(--rose-deep)}
  .hero-sub{margin:0 0 26px;max-width:560px;color:var(--ink-2);font-size:16px}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
  .hero-note{margin:18px 0 0;font-size:13.5px;color:#8a6e91}
  .model-panel{
    background:rgba(255,255,255,.92);
    border:1px solid var(--line);
    border-radius:22px;
    padding:24px;
    box-shadow:0 22px 46px rgba(190,30,105,.12);
  }
  .panel-title{margin:0 0 16px;font-weight:800;font-size:15px;color:var(--rose-deep);letter-spacing:.6px}
  .model-tags{display:flex;flex-wrap:wrap;gap:9px;list-style:none;margin:0;padding:0}
  .model-tags li{
    font-size:13px;padding:6px 12px;border-radius:999px;
    background:#fff5fa;border:1px solid #f8cade;color:#7a2a52;
    transition:background .2s ease,transform .2s ease;
  }
  .model-tags li:hover{background:#ffe4f0;transform:translateY(-2px)}
  .panel-note{margin:18px 0 0;font-size:13.5px;color:var(--ink-2);border-top:1px dashed #f6cede;padding-top:14px}
  .metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:40px}
  .metric{
    background:rgba(255,255,255,.9);
    border:1px solid var(--line);
    border-radius:16px;padding:18px 20px;
  }
  .metric strong{display:block;font-size:26px;color:var(--rose-deep);line-height:1.2}
  .metric span{display:block;font-size:13.5px;color:var(--ink-2);margin-top:6px}

  /* generic grid & cards */
  .grid{display:grid;gap:20px}
  .grid-2{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:repeat(4,1fr)}
  .card{
    background:#fff;
    border:1px solid var(--line);
    border-radius:var(--radius);
    padding:22px;
    transition:transform .28s ease,box-shadow .28s ease,border-color .28s ease;
  }
  .card:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(190,30,105,.14);border-color:#f0b3d2}
  .card p{margin:0;color:var(--ink-2);font-size:14.5px}
  .tag{
    display:inline-block;font-size:12.5px;color:var(--rose-deep);
    background:#fff0f7;border:1px solid #f8cade;border-radius:999px;
    padding:3px 10px;margin-bottom:10px;
  }
  .card h3{margin:0 0 8px}

  /* about */
  .about-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:38px;align-items:start}
  .point{
    border-left:3px solid var(--rose-mid);
    padding:2px 0 2px 16px;margin-bottom:22px;
  }
  .point h3{font-size:16.5px;margin-bottom:6px}
  .point p{margin:0;color:var(--ink-2);font-size:14.8px}
  .about-media{display:grid;gap:16px}
  .media-frame{
    border-radius:16px;overflow:hidden;border:1px solid var(--line);
    background:#fff;box-shadow:0 12px 26px rgba(190,30,105,.1);
  }
  .media-frame img{display:block;width:100%;height:auto}

  /* tag cloud */
  .tag-cloud{
    display:flex;flex-wrap:wrap;gap:10px;list-style:none;
    padding:0;margin:26px 0 0;justify-content:center;
  }
  .tag-cloud li{
    font-size:14px;padding:8px 16px;border-radius:999px;
    background:#fff;border:1px solid #f6c9de;color:#7a2a52;
    transition:background .2s ease,transform .2s ease,color .2s ease;
  }
  .tag-cloud li:hover{background:#ffe4f0;color:var(--rose-deep);transform:translateY(-2px)}

  /* steps */
  .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
  .step{background:#fff;border:1px solid var(--line);border-radius:16px;padding:20px 18px}
  .step-num{
    width:34px;height:34px;border-radius:10px;
    background:linear-gradient(135deg,#f0469b,#c00f5f);color:#fff;
    display:grid;place-items:center;font-weight:700;font-size:15px;margin-bottom:12px;
  }
  .step h3{font-size:16px;margin-bottom:6px}
  .step p{margin:0;font-size:14px;color:var(--ink-2)}

  /* network */
  .net-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}
  .net-item strong{display:block;color:var(--rose-deep);font-size:15px;margin-bottom:6px}
  .net-item span{font-size:14px;color:var(--ink-2)}

  /* cases */
  .case-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
  .case-media{
    background:#fff4f9;border-bottom:1px solid var(--line);
    aspect-ratio:4/3;display:grid;place-items:center;padding:10px;
  }
  .case-media img{width:100%;height:100%;object-fit:contain;display:block}
  .case-body{padding:18px 20px 20px}
  .case-body h3{font-size:17px;margin-bottom:6px}
  .case-body p{margin:0;font-size:14px;color:var(--ink-2)}

  /* review */
  .review-grid{display:grid;grid-template-columns:330px 1fr;gap:24px;align-items:start}
  .score-card{
    background:linear-gradient(150deg,#e0186f 0%,#8f0a46 100%);
    color:#fff;border-radius:22px;padding:28px;
    box-shadow:0 22px 42px rgba(160,15,80,.28);
  }
  .score-label{font-size:13.5px;letter-spacing:2px;opacity:.9}
  .stars{font-size:22px;color:#ffd76e;letter-spacing:4px;margin:10px 0 14px}
  .score-num{font-size:52px;font-weight:800;line-height:1}
  .score-num span{font-size:17px;font-weight:600;opacity:.86;margin-left:6px}
  .score-card p{margin:16px 0 22px;font-size:14.5px;color:#ffe9f3;line-height:1.8}
  .score-card .btn{width:100%}
  .table-wrap{
    overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:#fff;
    box-shadow:0 12px 26px rgba(190,30,105,.08);
  }
  table{width:100%;border-collapse:collapse;min-width:640px;font-size:14.8px}
  th,td{padding:14px 16px;text-align:left;border-bottom:1px solid #f8e6ef;vertical-align:top;line-height:1.65}
  thead th{background:#fff2f8;color:var(--rose-deep);font-weight:700;white-space:nowrap}
  tbody tr:last-child td{border-bottom:none}
  tbody td:first-child{font-weight:600;color:#3d2a44}
  .table-note{font-size:13.5px;color:#8a6e91;margin:14px 0 0}

  /* form */
  .match-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:32px;align-items:start}
  .form-card{
    background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px;
    box-shadow:0 18px 36px rgba(190,30,105,.1);
  }
  .form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
  .field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
  .field label{font-size:14px;font-weight:600;color:#3d2a44}
  .field input,.field select,.field textarea{
    width:100%;padding:11px 12px;border:1px solid #ecd2df;border-radius:10px;
    font-size:14.5px;font-family:inherit;color:var(--ink);background:#fffafd;
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .field input:focus,.field select:focus,.field textarea:focus{
    outline:none;border-color:var(--rose-mid);box-shadow:0 0 0 3px rgba(240,69,154,.16);
  }
  .field textarea{min-height:104px;resize:vertical}
  .form-tip{font-size:13px;color:#8a6e91;margin:12px 0 0}
  .match-tags{display:flex;flex-wrap:wrap;gap:10px;list-style:none;padding:0;margin:22px 0 0}
  .match-tags li{
    font-size:13.5px;padding:7px 14px;border-radius:999px;
    background:#fff;border:1px solid #f6c9de;color:#7a2a52;
  }

  /* learn */
  .learn-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px}
  .learn-card h3{font-size:17px;margin-bottom:12px;color:var(--rose-deep)}
  .link-list{list-style:none;margin:0;padding:0;display:grid;gap:10px}
  .link-list a{
    display:block;font-size:14.3px;color:#3d2a44;text-decoration:none;
    padding:8px 10px;border-radius:9px;background:#fffafd;
    border:1px solid #f8e3ee;transition:background .2s ease,color .2s ease,transform .2s ease;
  }
  .link-list a:hover{background:#fff0f7;color:var(--rose-deep);transform:translateX(3px)}
  .learn-card > p{color:var(--ink-2);font-size:14.3px;margin:0 0 14px}
  .mini-tags{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0}
  .mini-tags li{font-size:13px;padding:5px 11px;border-radius:999px;background:#fff0f7;color:#7a2a52;border:1px solid #f8cade}

  /* faq */
  .faq{max-width:900px;margin:0 auto;display:grid;gap:12px}
  .faq-item{
    background:#fff;border:1px solid var(--line);border-radius:14px;
    padding:0 18px;transition:border-color .25s ease,box-shadow .25s ease;
  }
  .faq-item:hover{border-color:#f0b3d2;box-shadow:0 12px 24px rgba(190,30,105,.1)}
  .faq-item summary{
    list-style:none;cursor:pointer;padding:16px 32px 16px 0;
    font-weight:600;font-size:15.2px;color:#2b1a30;position:relative;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::after{
    content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);
    color:var(--rose-deep);font-size:20px;font-weight:700;line-height:1;
  }
  .faq-item[open] summary::after{content:"−"}
  .faq-item p{margin:0;padding:0 0 18px;color:var(--ink-2);font-size:14.6px}

  /* voices */
  .voice{
    background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;
    display:flex;flex-direction:column;gap:14px;
    transition:transform .28s ease,box-shadow .28s ease;
  }
  .voice:hover{transform:translateY(-4px);box-shadow:0 18px 34px rgba(190,30,105,.13)}
  .voice p{margin:0;font-size:14.6px;color:#3c2b42}
  .voice-user{display:flex;align-items:center;gap:10px;margin-top:auto}
  .avatar{
    width:38px;height:38px;border-radius:50%;flex-shrink:0;
    background:linear-gradient(135deg,#f0469b,#a80d53);color:#fff;
    display:grid;place-items:center;font-weight:700;font-size:15px;
  }
  .voice-user b{display:block;font-size:14.5px;color:#2b1a30}
  .voice-user span{font-size:13px;color:var(--ink-2)}

  /* join */
  .join-band{
    background:linear-gradient(135deg,#e0186f 0%,#a80d53 100%);
    color:#fff;border-radius:24px;padding:36px;
    display:flex;align-items:center;justify-content:space-between;gap:28px;
    box-shadow:0 24px 48px rgba(160,15,80,.26);
  }
  .join-band h2{color:#fff;margin:0 0 10px;font-size:clamp(21px,2.6vw,29px);letter-spacing:.6px}
  .join-band p{margin:0;font-size:15px;color:#ffe6f1;max-width:660px}
  .join-actions{display:flex;gap:12px;flex-wrap:wrap;flex-shrink:0}

  /* contact */
  .contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:start}
  .contact-list{list-style:none;margin:0 0 24px;padding:0;display:grid;gap:12px}
  .contact-list li{
    display:flex;gap:14px;align-items:baseline;
    background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px 16px;
  }
  .contact-list li span{font-size:13.5px;color:#8a6e91;min-width:74px;flex-shrink:0}
  .contact-list li b,.contact-list li a{font-size:14.8px;color:#2b1a30;text-decoration:none;font-weight:600}
  .contact-list li a:hover{color:var(--rose-deep)}
  .qr-card{
    background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;
    text-align:center;box-shadow:0 16px 32px rgba(190,30,105,.1);
  }
  .qr-frame{
    width:200px;max-width:100%;margin:0 auto 14px;
    border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff8fc;
  }
  .qr-frame img{display:block;width:100%;height:auto}
  .qr-card p{margin:0;font-size:14px;color:var(--ink-2)}

  /* footer */
  .site-footer{
    background:#2a1020;color:#f7e6ef;padding:46px 0 20px;margin-top:0;
  }
  .footer-top{
    display:grid;grid-template-columns:1.3fr .85fr .95fr;gap:32px;
    padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.14);
  }
  .footer-brand-name{
    font-size:20px;font-weight:800;color:#fff;margin:0 0 12px;letter-spacing:1px;
  }
  .footer-brand p{margin:0 0 16px;font-size:14px;color:#e8cede;line-height:1.8}
  .footer-brand .btn{padding:10px 20px;font-size:14px}
  .footer-col-title{font-size:15px;font-weight:700;color:#fff;margin:0 0 14px}
  .footer-col ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
  .footer-col a,.footer-col li span{
    font-size:14px;color:#e8cede;text-decoration:none;transition:color .2s ease;
  }
  .footer-col a:hover{color:#ffb8d6}
  .footer-links{padding:22px 0;border-bottom:1px solid rgba(255,255,255,.14)}
  .footer-links-title{
    display:block;font-size:14px;font-weight:700;color:#fff;margin-bottom:12px;
  }
  .friend-list{display:flex;flex-wrap:wrap;gap:10px 18px}
  .friend-list a{font-size:13.5px;color:#e8cede;text-decoration:none;transition:color .2s ease}
  .friend-list a:hover{color:#ffb8d6}
  .footer-bottom{
    display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;
    gap:10px;padding-top:18px;
  }
  .footer-bottom p{margin:0;font-size:13.5px;color:#dcc0d2}
  .footer-bottom a{font-size:13.5px;color:#ffb8d6;text-decoration:none}
  .footer-bottom a:hover{color:#fff}

  /* float */
  .float-stack{
    position:fixed;right:18px;bottom:22px;z-index:80;
    display:flex;flex-direction:column;align-items:flex-end;gap:10px;
  }
  .fab{
    width:52px;height:52px;border-radius:50%;border:none;cursor:pointer;
    background:linear-gradient(135deg,#e6197a,#a80d53);color:#fff;
    display:grid;place-items:center;font-size:12.5px;font-weight:700;
    box-shadow:0 12px 24px rgba(160,15,80,.3);
    transition:transform .2s ease,box-shadow .2s ease,opacity .2s ease;
  }
  .fab:hover{transform:translateY(-2px);box-shadow:0 16px 30px rgba(160,15,80,.36)}
  .fab-back{opacity:0;pointer-events:none;background:#fff;color:var(--rose-deep);border:1px solid #f3b6d3;box-shadow:0 10px 20px rgba(160,15,80,.18)}
  .fab-back.show{opacity:1;pointer-events:auto}
  .kefu-panel{
    display:none;width:min(268px,calc(100vw - 36px));
    background:#fff;border:1px solid var(--line);border-radius:16px;
    padding:16px;box-shadow:0 22px 40px rgba(160,15,80,.22);text-align:center;
  }
  .kefu-panel.open{display:block}
  .kefu-panel h3{font-size:15px;margin:0 0 10px;color:var(--rose-deep)}
  .kefu-panel img{width:150px;height:auto;display:block;margin:0 auto 10px;border-radius:10px;border:1px solid var(--line)}
  .kefu-panel p{margin:0 0 6px;font-size:13.5px;color:var(--ink-2)}
  .kefu-panel a{font-size:13.5px;color:var(--rose-deep);text-decoration:none;font-weight:600}

  /* reveal */
  html.js .reveal{
    opacity:0;translate:0 18px;
    transition:opacity .65s ease,translate .65s ease,transform .28s ease,box-shadow .28s ease;
  }
  html.js .reveal.in{opacity:1;translate:0 0}

  @media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto}
    html.js .reveal{opacity:1;translate:0 0;transition:none}
    .btn,.card,.voice,.fab{transition:none}
  }

  /* responsive */
  @media (max-width:1024px){
    .nav-toggle{display:inline-flex}
    .header-inner{flex-wrap:wrap;padding-top:10px;padding-bottom:10px;min-height:0}
    .site-nav{
      order:3;flex-basis:100%;display:none;
      border-top:1px solid var(--line);margin-top:10px;padding-top:6px;
    }
    .site-nav.open{display:block}
    .nav-links{flex-direction:column;align-items:stretch;gap:0}
    .nav-links a{padding:12px 10px;border-bottom:1px dashed #f6dce8;border-radius:0}
    .hero-inner{grid-template-columns:1fr;gap:30px}
    .about-grid,.match-grid,.contact-grid{grid-template-columns:1fr;gap:26px}
    .review-grid{grid-template-columns:1fr}
    .steps{grid-template-columns:repeat(2,1fr)}
    .grid-4{grid-template-columns:repeat(2,1fr)}
    .grid-3{grid-template-columns:repeat(2,1fr)}
    .footer-top{grid-template-columns:1fr 1fr;gap:26px}
    .join-band{flex-direction:column;align-items:flex-start;padding:28px}
  }
  @media (max-width:720px){
    .section{padding:52px 0}
    .metrics{grid-template-columns:repeat(2,1fr)}
    .form-row{grid-template-columns:1fr}
    .hero{padding:40px 0 36px}
    .score-num{font-size:44px}
  }
  @media (max-width:600px){
    .grid-2,.grid-3,.grid-4,.steps{grid-template-columns:1fr}
    .footer-top{grid-template-columns:1fr}
    .header-cta .btn{padding:9px 16px}
    .brand{font-size:16px}
  }