/* 鑫万海官网（2026-10-11 首期）：配色沿用原 xwh56.com 首页 */
:root{
  --deep:#0A1B44; --brand:#14306E; --brand2:#1D479A; --link:#2563C7;
  --ink:#0E1A2E; --ink2:#33425C; --muted:#64738C; --line:#DCE3EE;
  --card:#FFFFFF; --sunk:#F3F6FB; --ok:#1F7A4D; --warn:#9A5B00;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB",
    "Microsoft YaHei UI","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*{box-sizing:border-box}
html{color-scheme:light;scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);font-size:15px;line-height:1.7;color:var(--ink);
     background:var(--card);-webkit-font-smoothing:antialiased}
h1,h2,h3{margin:0;letter-spacing:-.01em;text-wrap:balance}
p{margin:0}
a{color:var(--link)}
button,input,select,textarea{font-family:inherit;font-size:inherit}
:focus-visible{outline:2px solid var(--link);outline-offset:2px;border-radius:6px}


.wrap{max-width:1120px;margin:0 auto;padding:0 24px}

/* 顶栏 */
header.top{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);
  backdrop-filter:saturate(1.4) blur(6px);border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink)}
.logo img{width:38px;height:38px;object-fit:contain}
.logo b{font-size:16px;font-weight:800;letter-spacing:.04em}
nav.menu{display:flex;gap:4px;flex-wrap:wrap}
nav.menu a{color:var(--ink2);text-decoration:none;font-size:14px;padding:6px 10px;border-radius:6px}
nav.menu a:hover,nav.menu a.on{background:var(--sunk);color:var(--brand)}
nav.menu a.cta{background:var(--brand);color:#fff}
nav.menu a.cta:hover{background:var(--brand2)}

/* 首屏 */
.hero{background:linear-gradient(152deg,var(--deep) 0%,var(--brand) 50%,var(--brand2) 100%);color:#fff}
.hero .wrap{padding:64px 24px 56px}
.hero .eyebrow{font-size:13px;color:#A7BEE2;letter-spacing:.12em;margin-bottom:12px}
.hero h1{font-size:38px;font-weight:900;line-height:1.3;margin-bottom:16px}
.hero p.lead{color:#D3E0F5;font-size:17px;max-width:46em;text-wrap:pretty}
.hero .btns{display:flex;gap:12px;margin-top:28px;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 22px;border-radius:8px;font-weight:700;text-decoration:none;
  border:0;cursor:pointer;font-size:15px}
.btn.pri{background:#fff;color:var(--brand)}
.btn.pri:hover{background:#E8F0FC}
.btn.sec{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.5)}
.btn.sec:hover{background:rgba(255,255,255,.1)}
.btn.solid{background:var(--brand);color:#fff}
.btn.solid:hover{background:var(--brand2)}
.trust{display:flex;gap:10px 28px;flex-wrap:wrap;margin-top:34px;padding-top:22px;
  border-top:1px solid rgba(255,255,255,.18);font-size:13.5px;color:#C3D3EE}
.trust > span::before{content:"✓ ";color:#8FE0B5}

/* 小页首屏 */
.pagehead{background:var(--sunk);border-bottom:1px solid var(--line)}
.pagehead .wrap{padding:44px 24px 36px}
.pagehead .crumb{font-size:13px;color:var(--muted);margin-bottom:8px}
.pagehead .crumb a{color:var(--muted)}
.pagehead h1{font-size:30px;font-weight:850;margin-bottom:10px}
.pagehead p{color:var(--ink2);font-size:16px;max-width:44em}

/* 区块 */
section.blk{padding:56px 0}
section.blk.alt{background:var(--sunk)}
.blk h2{font-size:26px;font-weight:800;margin-bottom:8px}
.blk .intro{color:var(--muted);margin-bottom:28px;max-width:46em}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px}
.card h3{font-size:18px;font-weight:750;margin-bottom:8px}
.card p{color:var(--ink2);font-size:14.5px}
a.card{text-decoration:none;color:inherit;display:block;transition:border-color .15s,box-shadow .15s}
a.card:hover{border-color:var(--link);box-shadow:0 6px 20px rgba(20,48,110,.10)}
a.card .go{display:inline-block;margin-top:12px;color:var(--link);font-weight:600;font-size:14px}
.card .tag{display:inline-block;font-size:12px;color:var(--brand);background:#E8F0FC;border-radius:999px;
  padding:1px 10px;margin-bottom:10px}
ul.dots{margin:0;padding:0;list-style:none}
ul.dots li{position:relative;padding-left:16px;margin:6px 0;color:var(--ink2);font-size:14.5px}
ul.dots li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--link)}

/* 产品适用卡 */
.fit{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.fit div{border-radius:8px;padding:10px 12px;font-size:13.5px;line-height:1.6}
.fit b{display:block;font-size:12.5px;margin-bottom:4px;letter-spacing:.04em}
.fit .y{background:#EAF6EF}.fit .y b{color:var(--ok)}
.fit .m{background:#FFF5E5}.fit .m b{color:var(--warn)}
.fit .n{background:#F5F6F8}.fit .n b{color:var(--muted)}

/* 合作四步 */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.steps .card{position:relative;padding-top:48px}
.steps .card::before{counter-increment:s;content:counter(s);position:absolute;top:16px;left:22px;
  width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;font-weight:800;
  font-size:14px;display:flex;align-items:center;justify-content:center}

/* 问答 */
details{border:1px solid var(--line);border-radius:10px;background:var(--card);margin-bottom:10px}
details summary{cursor:pointer;padding:14px 18px;font-weight:650;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"＋";float:right;color:var(--muted)}
details[open] summary::after{content:"－"}
details div{padding:0 18px 16px;color:var(--ink2);font-size:14.5px}

/* 询价表单 */
.formwrap{display:grid;grid-template-columns:1fr 1.3fr;gap:36px;align-items:start}
form.inq{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px}
.fld{margin-bottom:14px}
.fld label{display:block;font-size:13.5px;font-weight:600;color:var(--ink2);margin-bottom:6px}
.fld label small{font-weight:400;color:var(--muted)}
.fld input,.fld select,.fld textarea{width:100%;padding:10px 12px;border:1px solid var(--line);
  border-radius:8px;background:var(--sunk);color:var(--ink);font-size:14.5px}
.fld textarea{min-height:76px;resize:vertical}
.fld input:focus,.fld select:focus,.fld textarea:focus{outline:none;border-color:var(--link);
  background:#fff;box-shadow:0 0 0 3px rgba(37,99,199,.13)}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.radios{display:flex;gap:8px;flex-wrap:wrap}
.radios label{display:flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:8px;
  padding:7px 12px;font-weight:500;cursor:pointer;background:var(--sunk);margin:0}
.radios input{width:auto;margin:0}
.note{font-size:13px;color:var(--muted);margin-top:10px}
.okmsg{display:none;margin-top:14px;padding:12px 14px;border-radius:8px;background:#EAF6EF;
  color:#14532D;font-size:14px}
.okmsg.on{display:block}

/* 页脚 */
footer{background:var(--deep);color:#B9C8E4;font-size:13.5px}
footer .wrap{padding:40px 24px 28px;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px}
footer h4{color:#fff;font-size:14px;margin:0 0 10px}
footer a{color:#D3E0F5;text-decoration:none}
footer a:hover{text-decoration:underline}
footer .copy{grid-column:1/-1;border-top:1px solid rgba(255,255,255,.12);padding-top:16px;
  font-size:12.5px;color:#8FA3C8}

@media(max-width:900px){
  .g3,.g4,.steps,.fit{grid-template-columns:1fr 1fr}
  .formwrap,footer .wrap{grid-template-columns:1fr}
  .hero h1{font-size:30px}
}
@media(max-width:640px){
  header.top .wrap{height:auto;padding:10px 16px;flex-direction:column;align-items:flex-start;gap:6px}
  nav.menu a{padding:4px 8px;font-size:13.5px}
  .g2,.g3,.g4,.steps,.fit,.row2{grid-template-columns:1fr}
  .hero .wrap{padding:44px 20px 40px}
  .hero h1{font-size:26px}
  .wrap{padding:0 18px}
  section.blk{padding:40px 0}
}

/* 顶栏是固定的，跳到锚点时留出顶栏高度 */
section[id]{scroll-margin-top:72px}

/* 首期上线补充 */
.hp{position:absolute!important;left:-10000px!important;width:1px;height:1px;overflow:hidden}
.errmsg{display:none;margin-top:14px;padding:12px 14px;border-radius:8px;background:#FDECEC;color:#7A1F1F;font-size:14px}
.errmsg.on{display:block}
.fld .req{color:#B42318;margin-left:2px}
.qr{width:120px;height:120px;border-radius:8px;background:#fff;padding:6px;margin-top:6px}
.idline{font-size:13px;color:var(--muted);margin-top:16px}

/* 服务卡：承运商官方服务全名（10-11 业务分类加全名） */
.card .svc{font-size:12.5px;font-weight:650;color:var(--brand2);letter-spacing:.02em;line-height:1.5;margin:-2px 0 8px}