/* 字体策略：仅使用系统自带中文字体，规避商用字体版权风险 */
  :root{
    --font-sans: "Microsoft YaHei","微软雅黑","PingFang SC","Hiragino Sans GB","Heiti SC","黑体",SimHei,system-ui,-apple-system,sans-serif;
    --font-serif: "SimSun","宋体","Songti SC",serif;
    --navy:#102a4c;
    --blue:#1f5fbf;
    --blue-light:#3b82f6;
    --gold:#c79a3a;
    --gold-light:#e0b659;
    --ink:#1f2937;
    --gray:#5b6675;
    --bg:#ffffff;
    --bg-soft:#f4f7fb;
    --line:#e4eaf2;
    --radius:14px;
    --shadow:0 10px 30px rgba(16,42,76,.08);
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    font-family:var(--font-sans);
    color:var(--ink);
    background:var(--bg);
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
  }
  a{color:inherit;text-decoration:none}
  .wrap{max-width:1140px;margin:0 auto;padding:0 22px}

  /* 顶栏 */
  header{
    position:sticky;top:0;z-index:50;
    background:rgba(255,255,255,.92);
    backdrop-filter:saturate(180%) blur(10px);
    border-bottom:1px solid var(--line);
  }
  .nav{display:flex;align-items:center;justify-content:space-between;height:64px}
  .brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--navy)}
  .brand .dot{width:12px;height:12px;border-radius:50%;background:linear-gradient(135deg,var(--blue),var(--gold));}
  .nav-links{display:flex;gap:26px;font-size:15px;color:var(--gray)}
  .nav-links a:hover{color:var(--blue)}
  .nav-cta{
    background:var(--navy);color:#fff;padding:9px 18px;border-radius:999px;
    font-size:14px;font-weight:600;transition:.2s;
  }
  .nav-cta:hover{background:var(--blue)}
  /* 创业入口按钮：金色填充，与「购买域名」海军蓝区分、更跳眼 */
  .nav-cta-gold{
    background:linear-gradient(135deg,var(--gold-light),var(--gold));
    color:#3a2c06;padding:9px 18px;border-radius:999px;
    font-size:14px;font-weight:700;transition:.2s;
  }
  .nav-cta-gold:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(199,154,58,.4)}
  /* 移动端汉堡菜单 */
  .nav-actions{display:flex;align-items:center;gap:12px}
  .nav-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;padding:0;border:none;background:transparent;cursor:pointer}
  .nav-toggle span{display:block;width:24px;height:2px;background:var(--navy);border-radius:2px;transition:.25s}
  header.open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  header.open .nav-toggle span:nth-child(2){opacity:0}
  header.open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  @media(max-width:760px){
    .nav-toggle{display:inline-flex}
    .nav-links{
      display:none;position:absolute;left:0;right:0;top:64px;
      flex-direction:column;gap:0;padding:6px 22px 14px;
      background:#fff;border-bottom:1px solid var(--line);
      box-shadow:0 12px 24px rgba(16,42,76,.08);
    }
    header.open .nav-links{display:flex}
    .nav-links a{padding:13px 0;border-bottom:1px solid var(--line);font-size:15px}
    .nav-links a:last-child{border-bottom:none}
    .nav-cta,.nav-cta-gold{font-size:12px;padding:7px 12px}
  }

  /* Hero */
  .hero{
    position:relative;overflow:hidden;
    background:radial-gradient(1200px 500px at 80% -10%,rgba(59,130,246,.25),transparent 60%),
               linear-gradient(160deg,var(--navy) 0%,#16365f 55%,#0d2138 100%);
    color:#fff;padding:78px 0 92px;
  }
  .hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}
  .tag{
    display:inline-flex;align-items:center;gap:8px;
    background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);
    padding:6px 14px;border-radius:999px;font-size:13px;letter-spacing:1px;color:#dfe9f7;
  }
  .hero h1{font-size:46px;line-height:1.25;margin:18px 0 14px;font-weight:800;letter-spacing:1px}
  .hero h1 .hl{color:var(--gold-light)}
  .hero h1 .no-break{white-space:nowrap;word-break:keep-all}
  .hero p.lead{font-size:18px;color:#c9d8ec;max-width:560px}
  .hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
  .btn{
    padding:13px 26px;border-radius:999px;font-weight:700;font-size:15px;transition:.2s;cursor:pointer;border:none;
  }
  .btn-gold{background:linear-gradient(135deg,var(--gold-light),var(--gold));color:#3a2c06}
  .btn-gold:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(199,154,58,.4)}
  .btn-ghost{background:transparent;border:1px solid rgba(255,255,255,.5);color:#fff}
  .btn-ghost:hover{background:rgba(255,255,255,.1)}

  /* 域名卡片 */
  .domain-card{
    background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.18);
    border-radius:18px;padding:26px;box-shadow:var(--shadow);
  }
  .browser-bar{display:flex;align-items:center;gap:7px;margin-bottom:18px}
  .browser-bar i{width:11px;height:11px;border-radius:50%;display:inline-block}
  .browser-bar .r{background:#ff5f57}.browser-bar .y{background:#febc2e}.browser-bar .g{background:#28c840}
  .browser-url{
    flex:1;background:rgba(255,255,255,.1);border-radius:8px;padding:8px 14px;
    font-size:14px;color:#dfe9f7;font-family:var(--font-sans);letter-spacing:.5px;
  }
  .domain-name{
    font-family:var(--font-serif);font-size:30px;font-weight:700;color:#fff;
    word-break:break-all;line-height:1.4;
  }
  .domain-name .c{color:var(--gold-light)}
  .domain-meta{margin-top:14px;display:flex;gap:18px;font-size:13px;color:#a9c0dd;flex-wrap:wrap}
  .domain-meta b{color:#fff;font-weight:600}

  @media(max-width:860px){.hero-grid{grid-template-columns:1fr}.hero h1{font-size:34px}}

  /* 区块通用 */
  section{padding:70px 0}
  .sec-soft{background:var(--bg-soft)}
  .sec-head{text-align:center;max-width:720px;margin:0 auto 46px}
  .sec-head .kicker{color:var(--gold);font-weight:700;letter-spacing:3px;font-size:13px}
  .sec-head h2{font-size:32px;color:var(--navy);margin:10px 0 12px;font-weight:800}
  .sec-head p{color:var(--gray);font-size:16px}

  /* 含义拆解 */
  .meaning{display:grid;grid-template-columns:1fr 1fr;gap:24px}
  .m-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:30px;box-shadow:var(--shadow);position:relative;overflow:hidden;
  }
  .m-card::before{content:"";position:absolute;left:0;top:0;width:5px;height:100%;background:linear-gradient(var(--blue),var(--gold))}
  .m-icon{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:var(--bg-soft);margin-bottom:16px}
  .m-card h3{font-size:24px;color:var(--navy);margin-bottom:4px}
  .m-card .py{color:var(--blue);font-size:14px;letter-spacing:1px;margin-bottom:12px}
  .m-card p{color:var(--gray);font-size:15px}
  .m-card ul{margin-top:14px;list-style:none;display:flex;flex-direction:column;gap:8px}
  .m-card li{font-size:14px;color:var(--ink);padding-left:20px;position:relative}
  .m-card li::before{content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:50%;background:var(--gold)}
  @media(max-width:760px){.meaning{grid-template-columns:1fr}}

  /* 服务 */
  .services{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .s-card{
    background:#fff;border:1px solid var(--line);border-radius:var(--radius);
    padding:26px;transition:.2s;
  }
  .s-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cdddf2}
  .s-num{font-family:var(--font-serif);font-size:30px;color:var(--gold);font-weight:700}
  .s-card h4{font-size:19px;color:var(--navy);margin:8px 0 10px}
  .s-card p{font-size:14px;color:var(--gray)}
  @media(max-width:860px){.services{grid-template-columns:1fr 1fr}}
  @media(max-width:560px){.services{grid-template-columns:1fr}}

  /* 域名价值 */
  .value{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
  .v-card{text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 18px}
  .v-card .big{font-family:var(--font-serif);font-size:34px;color:var(--blue);font-weight:700}
  .v-card h4{font-size:16px;color:var(--navy);margin:10px 0 6px}
  .v-card p{font-size:13px;color:var(--gray)}
  @media(max-width:860px){.value{grid-template-columns:1fr 1fr}}
  @media(max-width:480px){.value{grid-template-columns:1fr}}

  /* 服务流程 */
  .process{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
  .step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 16px;text-align:center;box-shadow:var(--shadow)}
  .step-num{width:46px;height:46px;border-radius:50%;margin:0 auto 14px;display:flex;align-items:center;justify-content:center;font-family:var(--font-serif);font-size:22px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--blue),var(--blue-light))}
  .step h4{font-size:17px;color:var(--navy);margin-bottom:6px}
  .step p{font-size:13px;color:var(--gray)}
  @media(max-width:860px){.process{grid-template-columns:1fr 1fr}}
  @media(max-width:520px){.process{grid-template-columns:1fr}}

  /* 核心优势 */
  .stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:44px}
  .stat{text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 16px;box-shadow:var(--shadow)}
  .stat .num{font-family:var(--font-serif);font-size:36px;font-weight:700;color:var(--blue)}
  .stat .num span{color:var(--gold)}
  .stat p{font-size:14px;color:var(--gray);margin-top:6px}
  @media(max-width:760px){.stats{grid-template-columns:1fr 1fr}}
  .compare{overflow:hidden;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);background:#fff}
  .compare table{width:100%;border-collapse:collapse}
  .compare th,.compare td{padding:15px 18px;text-align:center;font-size:14px;border-bottom:1px solid var(--line)}
  .compare thead th{background:var(--navy);color:#fff;font-size:15px}
  .compare thead th.hl{background:var(--blue)}
  .compare tbody th{background:var(--bg-soft);color:var(--navy);font-weight:600;text-align:left}
  .compare tbody tr:last-child td,.compare tbody tr:last-child th{border-bottom:none}
  .compare .yes{color:#1a9c5b;font-weight:700}
  @media(max-width:560px){.compare th,.compare td{padding:11px 10px;font-size:13px}}

  /* 适用客户 */
  .clients{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
  .c-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s}
  .c-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cdddf2}
  .c-card .c-ic{width:46px;height:46px;border-radius:12px;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:var(--gold);font-size:20px}
  .c-card h4{font-size:18px;color:var(--navy);margin-bottom:8px}
  .c-card p{font-size:14px;color:var(--gray)}
  @media(max-width:860px){.clients{grid-template-columns:1fr 1fr}}
  @media(max-width:560px){.clients{grid-template-columns:1fr}}

  /* FAQ */
  .faq{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
  .qa{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 24px;box-shadow:var(--shadow)}
  .qa h4{font-size:16px;color:var(--navy);margin-bottom:8px;display:flex;align-items:center;gap:10px;font-weight:700}
  .qa h4::before{content:"Q";display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:7px;background:var(--gold);color:#fff;font-family:var(--font-serif);font-weight:700;font-size:15px;flex:none}
  .qa p{font-size:14px;color:var(--gray);padding-left:36px}

  /* 域名出售 */
  .sale{background:linear-gradient(135deg,#102a4c,#16365f);color:#fff;border-radius:18px;padding:40px;box-shadow:var(--shadow);position:relative;overflow:hidden}
  .sale::after{content:"";position:absolute;right:-40px;top:-40px;width:200px;height:200px;border-radius:50%;background:radial-gradient(rgba(224,182,89,.22),transparent 70%)}
  .sale-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center;position:relative;z-index:1}
  .sale .badge{display:inline-block;background:var(--gold);color:#3a2c06;font-weight:700;font-size:13px;padding:5px 14px;border-radius:999px;letter-spacing:1px;margin-bottom:14px}
  .sale h2{font-size:30px;margin-bottom:12px;font-weight:800}
  .sale p.ld{font-size:16px;color:#c9d8ec;margin-bottom:18px}
  .sale ul{list-style:none;display:flex;flex-direction:column;gap:10px}
  .sale li{font-size:15px;color:#e6eefb;padding-left:24px;position:relative}
  .sale li::before{content:"✓";position:absolute;left:0;top:0;color:var(--gold-light);font-weight:700}
  .sale-card{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:14px;padding:22px}
  .sale-card .row{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.18);font-size:14px}
  .sale-card .row:last-of-type{border-bottom:none}
  .sale-card .row b{color:#fff}
  .sale-card .row span{color:#a9c0dd}
  .sale-card .row .v{color:var(--gold-light);font-weight:700}
  .sale-card .btn-gold{width:100%;text-align:center;display:block;margin-top:16px}
  @media(max-width:760px){.sale-grid{grid-template-columns:1fr}.sale{padding:30px 22px}}

  /* 联系 / 询价 */
  .contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
  .contact-info h3{font-size:24px;color:var(--navy);margin-bottom:14px}
  .contact-info p{color:var(--gray);margin-bottom:18px;font-size:15px}
  .info-row{display:flex;align-items:center;gap:12px;margin-bottom:14px;font-size:15px}
  .info-row .ic{width:40px;height:40px;border-radius:10px;background:var(--bg-soft);display:flex;align-items:center;justify-content:center;color:var(--blue)}
  /* 微信二维码卡片 */
  .qr-box{margin-top:22px;display:inline-block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 16px 12px;text-align:center;box-shadow:var(--shadow)}
  .qr-img{width:150px;height:150px;object-fit:contain;border-radius:8px;display:block}
  .qr-tip{margin-top:10px;font-size:13px;color:var(--gray)}
  @media(max-width:760px){.qr-img{width:130px;height:130px}}
  .form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
  .field{margin-bottom:16px}
  .field label{display:block;font-size:14px;color:var(--navy);margin-bottom:6px;font-weight:600}
  .field input,.field textarea{
    width:100%;padding:11px 14px;border:1px solid var(--line);border-radius:10px;
    font-family:var(--font-sans);font-size:14px;color:var(--ink);background:#fbfdff;
  }
  .field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);background:#fff}
  .field textarea{resize:vertical;min-height:90px}
  /* 反垃圾蜜罐字段：移出视口但保留可提交 */
  .field.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
  .submit{
    width:100%;background:linear-gradient(135deg,var(--blue),var(--blue-light));
    color:#fff;border:none;padding:13px;border-radius:10px;font-weight:700;font-size:15px;cursor:pointer;transition:.2s;
  }
  .submit:hover{filter:brightness(1.06)}
  .form-msg{font-size:14px;margin-top:10px;min-height:20px}
  .form-msg.ok{color:#1a9c5b}
  .form-msg.err{color:#d9534f}
  .form-note{font-size:12px;color:var(--gray);margin-top:10px;text-align:center}
  @media(max-width:760px){.contact-grid{grid-template-columns:1fr}}

  /* 页脚 */
  footer{background:var(--navy);color:#c9d8ec;padding:38px 0;font-size:14px}
  .foot{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;align-items:center}
  .foot .brand{color:#fff}
  .foot-links{display:flex;gap:20px;flex-wrap:wrap}
  .foot-links a:hover{color:#fff}
  .copyright{margin-top:18px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);color:#8fa6c4;font-size:13px}