/* =========================================================
   钱塘联云 · 100l0.net
   B2B 运营商业务站：深蓝底 + 联通红 CTA + 高信息密度
   移动端优先适配；所有样式集中在 --tokens 里调
   ========================================================= */

:root{
  --ink:#0e1b2e;
  --ink-2:#23364f;
  --muted:#5b6b80;
  --muted-2:#7b8aa0;
  --bg:#f4f7fb;
  --card:#ffffff;
  --line:#e1e8f1;
  --line-2:#cfdae8;

  --navy:#07152b;
  --navy-2:#0b2347;
  --navy-3:#123b6e;
  --brand:#0b57c2;
  --brand-d:#083f8f;
  --brand-l:#eaf2ff;
  --cyan:#18a8c9;
  --red:#e60012;
  --red-d:#c2000f;
  --ok:#15803d;
  --warn:#b45309;

  --r:12px;
  --r-lg:18px;
  --wrap:1180px;
  --sh:0 1px 2px rgba(14,27,46,.05), 0 10px 28px rgba(14,27,46,.07);
  --sh-lg:0 18px 50px rgba(7,21,43,.16);
  --ff:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.75 var(--ff);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body.navopen{overflow:hidden}
img,svg{max-width:100%}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
p{margin:0 0 1em}
ul,ol{margin:0 0 1em;padding-left:1.25em}
li{margin:.25em 0}
b,strong{font-weight:700}
:focus-visible{outline:3px solid rgba(11,87,194,.35);outline-offset:2px;border-radius:6px}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:0;background:#fff;color:var(--ink);padding:10px 14px;z-index:999}
.skip:focus{left:12px;top:12px}

h1,h2,h3,h4{line-height:1.3;margin:0 0 .5em;color:var(--ink)}
h1{font-size:clamp(30px,4.2vw,48px);letter-spacing:.3px}
h2{font-size:clamp(24px,3.1vw,34px);letter-spacing:.2px}
h3{font-size:19px}
h4{font-size:16px}
.muted{color:var(--muted)}
.small{font-size:14px}
.mini{font-size:12.5px;color:var(--muted)}
.center{text-align:center}
.nowrap{white-space:nowrap}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:12px 22px;border-radius:10px;border:1px solid transparent;
  font:600 15px/1.2 var(--ff);cursor:pointer;transition:.18s ease;
  white-space:nowrap;text-decoration:none;
}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.lg{padding:14px 26px;font-size:16px}
.btn.sm{padding:9px 14px;font-size:14px;border-radius:8px}
.btn.primary{background:var(--red);color:#fff;box-shadow:0 8px 20px rgba(230,0,18,.22)}
.btn.primary:hover{background:var(--red-d)}
.btn.blue{background:var(--brand);color:#fff}
.btn.blue:hover{background:var(--brand-d)}
.btn.ghost{background:transparent;border-color:rgba(255,255,255,.45);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn.outline{background:#fff;border-color:var(--line-2);color:var(--brand-d)}
.btn.outline:hover{border-color:var(--brand);background:var(--brand-l)}
.btn .ar{transition:transform .18s ease}
.btn:hover .ar{transform:translateX(3px)}

/* ---------- 页头 ---------- */
.hd{
  position:sticky;top:0;z-index:80;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.hdin{display:flex;align-items:center;gap:22px;height:76px}
.logo{display:flex;align-items:center;gap:11px;flex:none;text-decoration:none}
.logo:hover{text-decoration:none}
.logo-mark{width:40px;height:40px;flex:none;display:block}
.logo-txt{display:flex;flex-direction:column;line-height:1.14;min-width:0}
.logo-name{font-size:20px;font-weight:800;letter-spacing:1.5px;color:var(--ink)}
.logo-sub{font-size:11px;color:var(--muted);letter-spacing:.3px;white-space:nowrap}
.nav{display:flex;align-items:center;justify-content:center;gap:2px;flex:1}
.nav a{padding:9px 12px;border-radius:9px;color:var(--ink-2);font-size:15px;white-space:nowrap;text-decoration:none}
.nav a:hover{background:var(--brand-l);color:var(--brand-d)}
.nav a.on{background:var(--brand-l);color:var(--brand-d);font-weight:700}
.hact{display:flex;align-items:center;gap:14px;flex:none}
.hphone{display:flex;flex-direction:column;line-height:1.2;text-align:right;text-decoration:none}
.hphone span{font-size:11px;color:var(--muted)}
.hphone b{font-size:16px;color:var(--ink);font-variant-numeric:tabular-nums;letter-spacing:.3px}
.hphone:hover b{color:var(--brand)}
.hbtn{display:inline-flex}
.burger{
  display:none;background:none;border:0;cursor:pointer;padding:8px;border-radius:8px;
  color:var(--ink);margin-left:auto;
}
.burger svg{width:26px;height:26px;display:block}
.burger:hover{background:var(--brand-l)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:
    radial-gradient(900px 500px at 78% 18%, rgba(24,168,201,.18), transparent 60%),
    radial-gradient(700px 420px at 12% 90%, rgba(11,87,194,.28), transparent 62%),
    linear-gradient(135deg,#061327 0%,#0a2143 52%,#0d3160 100%);
}
.hero:before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:
    linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(80% 70% at 50% 35%, #000 20%, transparent 100%);
  mask-image:radial-gradient(80% 70% at 50% 35%, #000 20%, transparent 100%);
}
.hero-in{
  position:relative;z-index:2;display:grid;grid-template-columns:1.12fr .88fr;
  gap:44px;align-items:center;padding:76px 0 66px;
}
.hero .tag{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 13px;border-radius:999px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  color:#cfe2ff;font-size:13px;font-weight:600;letter-spacing:.4px;
}
.hero .tag i{width:7px;height:7px;border-radius:50%;background:#43e0a0;box-shadow:0 0 0 4px rgba(67,224,160,.15)}
.hero h1{color:#fff;margin:18px 0 16px;text-shadow:0 2px 24px rgba(0,0,0,.18)}
.hero h1 em{font-style:normal;color:#8fd3ff}
.hero .hs{font-size:17px;line-height:1.8;color:#c6d8ef;max-width:640px;margin:0 0 24px}
.hero .hs b{color:#fff}
.hbtns{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.htrust{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;max-width:620px}
.htrust li{display:flex;align-items:flex-start;gap:8px;list-style:none;margin:0;color:#dbe8f8;font-size:14px}
.htrust svg{width:18px;height:18px;flex:none;color:#43e0a0;margin-top:2px}

/* 拓扑图 */
.topo{
  position:relative;border-radius:22px;padding:10px;
  background:linear-gradient(180deg,rgba(255,255,255,.08),rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.14);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.12), 0 24px 60px rgba(0,0,0,.2);
}
.topo svg{display:block;width:100%;height:auto}
.topo .flow{stroke-dasharray:5 7;animation:dash 12s linear infinite}
.topo .node-box{fill:rgba(9,27,52,.86);stroke:rgba(143,211,255,.38)}
.topo .node-core{fill:rgba(11,87,194,.32);stroke:#8fd3ff}
.topo text{font-family:var(--ff)}
.topo .t1{fill:#fff;font-size:13px;font-weight:700}
.topo .t2{fill:#a9c3e2;font-size:10.5px}
@keyframes dash{to{stroke-dashoffset:-240}}

/* ---------- 区块 ---------- */
.sec{padding:64px 0}
.sec.white{background:#fff}
.sec.soft{background:var(--bg)}
.sec.dark{background:linear-gradient(135deg,var(--navy),var(--navy-3));color:#dbe8f8}
.sec.dark h2,.sec.dark h3{color:#fff}
.sec.dark .lead{color:#b9cde6}
.sec-head{max-width:800px;margin:0 0 30px}
.sec-head.center{margin-left:auto;margin-right:auto}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:2.4px;
  color:var(--brand);text-transform:uppercase;margin-bottom:4px;
}
.sec.dark .eyebrow{color:#8fd3ff}
.lead{color:var(--muted);font-size:16px;margin:0}
.sec.dark .lead{color:#b9cde6}

/* ---------- 网格与卡片 ---------- */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g5{grid-template-columns:repeat(5,minmax(0,1fr))}

.pcard{
  position:relative;display:flex;flex-direction:column;
  background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:24px;box-shadow:var(--sh);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease;
}
.pcard:hover{transform:translateY(-3px);box-shadow:var(--sh-lg);border-color:#c9d8ea}
.pcard .picon{
  width:48px;height:48px;border-radius:13px;display:grid;place-items:center;
  background:var(--brand-l);color:var(--brand);margin-bottom:16px;flex:none;
}
.pcard .picon svg{width:25px;height:25px}
.pcard h3{font-size:19px;margin:0 0 7px;color:var(--ink)}
.pcard p{color:var(--muted);font-size:14.5px;margin:0 0 14px}
.pcard .plink{margin-top:auto;font-weight:700;font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:6px}
.pcard:hover .plink{color:var(--brand-d);text-decoration:underline}

/* 行内 SVG 尺寸：避免无宽高的图标被拉满容器 */
.btn svg{width:18px;height:18px;flex:none}
.plink svg,.sollink svg{width:16px;height:16px;flex:none}
.related a svg{width:17px;height:17px;flex:none}
.anchors svg{width:14px;height:14px;flex:none}
.note svg{width:20px;height:20px;flex:none}
.pcard .corner{position:absolute;top:20px;right:20px;font-size:11px;font-weight:700;color:var(--brand);background:var(--brand-l);border-radius:999px;padding:4px 9px}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 14px}
.tags span{font-size:11.5px;padding:4px 8px;border-radius:999px;background:#f1f5fb;color:#42536c;line-height:1.4}

/* 产品线入口 */
.cat-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px;box-shadow:var(--sh);transition:.18s ease;
  border-top:4px solid var(--brand);
}
.cat-card:nth-child(2){border-top-color:var(--cyan)}
.cat-card:nth-child(3){border-top-color:#6b52d8}
.cat-card:nth-child(4){border-top-color:var(--red)}
.cat-card:nth-child(5){border-top-color:#d99a0b}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg)}
.cat-card h3{font-size:20px;margin:14px 0 8px}
.cat-card p{color:var(--muted);font-size:14.5px;margin:0 0 14px}
.cat-card .picon{width:48px;height:48px;border-radius:13px;background:var(--brand-l);color:var(--brand);display:grid;place-items:center}
.cat-card .picon svg{width:25px;height:25px}
.cat-list{list-style:none;padding:0;margin:0 0 18px;display:grid;gap:5px}
.cat-list li{font-size:13.5px;color:var(--ink-2);padding-left:16px;position:relative;margin:0}
.cat-list li:before{content:"";position:absolute;left:0;top:.65em;width:5px;height:5px;border-radius:50%;background:var(--brand)}
.cat-card .plink{margin-top:auto;font-weight:700;font-size:14px}

/* 解决方案 */
.sol-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.sol{
  display:flex;gap:15px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:20px;transition:.18s ease;
}
.sol:hover{border-color:#c9d8ea;box-shadow:var(--sh);transform:translateY(-2px)}
.sol-num{
  width:38px;height:38px;border-radius:11px;flex:none;display:grid;place-items:center;
  background:var(--brand-l);color:var(--brand-d);font-weight:800;font-size:13px;letter-spacing:.5px;
}
.sol h3{font-size:16.5px;margin:0 0 5px}
.sol p{font-size:13.5px;color:var(--muted);margin:0}
.sol .sollink{font-size:13px;font-weight:700;color:var(--brand);margin-top:7px;display:inline-block}

/* 覆盖区域 */
.districts{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}
.district{
  background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 8px;
  text-align:center;font-size:14px;color:var(--ink-2);font-weight:600;
}
.district small{display:block;font-size:11px;color:var(--muted-2);font-weight:400;margin-top:1px}
.coverage-note{display:flex;align-items:flex-start;gap:9px;margin-top:16px;color:var(--muted);font-size:13.5px}
.coverage-note svg{width:18px;height:18px;flex:none;color:var(--brand);margin-top:2px}

/* 为什么选我们 */
.why{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.why-item{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px}
.why-item .n{font-size:12px;font-weight:800;letter-spacing:1.5px;color:var(--brand);margin-bottom:8px}
.why-item h3{font-size:16.5px;margin:0 0 6px}
.why-item p{font-size:14px;color:var(--muted);margin:0}

/* 流程 */
.steps{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px;counter-reset:step}
.step{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 14px;
  position:relative;
}
.step:before{
  counter-increment:step;content:"0" counter(step);
  display:block;font-size:12px;font-weight:800;letter-spacing:1px;color:var(--brand);margin-bottom:7px;
}
.step h3{font-size:14.5px;margin:0 0 4px}
.step p{font-size:12.5px;color:var(--muted);margin:0;line-height:1.6}

/* ---------- 表格 ---------- */
.tw{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line);border-radius:14px;background:#fff;box-shadow:var(--sh)}
table{width:100%;min-width:720px;border-collapse:collapse;font-size:14.5px}
th,td{padding:13px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
th{background:#f7f9fc;color:var(--ink-2);font-weight:700;white-space:nowrap}
tbody tr:hover{background:#fbfdff}
tr:last-child td{border-bottom:0}
td b{color:var(--ink)}
.tnote{font-size:12.5px;color:var(--muted);margin:8px 0 0}

/* ---------- 提示块 ---------- */
.note{
  display:flex;gap:12px;align-items:flex-start;
  background:var(--brand-l);border:1px solid #cfe0fa;border-radius:12px;padding:16px 18px;
  color:var(--ink-2);font-size:14px;
}
.note svg{width:20px;height:20px;flex:none;color:var(--brand);margin-top:1px}
.note.warn{background:#fff7ed;border-color:#fed7aa;color:#7c2d12}
.note.warn svg{color:var(--warn)}
.note.ok{background:#ecfdf3;border-color:#bbf7d0;color:#14532d}
.note.ok svg{color:var(--ok)}
.note p:last-child{margin-bottom:0}

/* ---------- 问答 ---------- */
.faq{display:flex;flex-direction:column;gap:10px}
details{background:#fff;border:1px solid var(--line);border-radius:12px;transition:border-color .15s ease}
details[open]{border-color:#c9d8ea}
summary{
  cursor:pointer;padding:16px 18px;font-weight:700;list-style:none;
  display:flex;align-items:flex-start;gap:10px;color:var(--ink);
}
summary::-webkit-details-marker{display:none}
summary:before{
  content:"+";flex:none;width:22px;height:22px;border-radius:6px;background:var(--brand-l);
  color:var(--brand);display:grid;place-items:center;font-weight:800;font-size:15px;margin-top:1px;
}
details[open] summary:before{content:"−"}
.fa{padding:0 18px 18px 50px;color:var(--muted);font-size:14.5px}
.fa p:last-child{margin-bottom:0}

/* ---------- CTA 横幅 ---------- */
.cta-band{
  background:
    radial-gradient(600px 300px at 80% 20%, rgba(24,168,201,.22), transparent 60%),
    linear-gradient(135deg,var(--navy),var(--navy-3));
  color:#fff;border-radius:var(--r-lg);padding:38px 36px;
  display:flex;align-items:center;justify-content:space-between;gap:26px;flex-wrap:wrap;
  box-shadow:var(--sh-lg);
}
.cta-band h2{color:#fff;font-size:26px;margin:0 0 7px}
.cta-band p{color:#c6d8ef;margin:0;max-width:640px}
.cta-band .btns{display:flex;gap:10px;flex-wrap:wrap}

/* ---------- 表单 ---------- */
.form-sec{background:linear-gradient(180deg,#f7faff 0%,#eef4fc 100%);padding:64px 0}
.form-wrap{display:grid;grid-template-columns:.92fr 1.08fr;gap:44px;align-items:start}
.form-copy h2{margin-bottom:12px}
.form-copy .lead{margin-bottom:20px}
.checklist{list-style:none;padding:0;margin:0 0 22px;display:grid;gap:9px}
.checklist li{display:flex;gap:9px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);margin:0}
.checklist svg{width:18px;height:18px;flex:none;color:var(--ok);margin-top:2px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:28px;box-shadow:var(--sh)}
.form-card h3{margin:0 0 6px;font-size:20px}
.form-card .fnote{font-size:13.5px;color:var(--muted);margin:0 0 18px}
.form-card form > .btn{width:100%}
.frow{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{margin:0 0 14px}
.field label{display:block;font-size:13.5px;font-weight:700;margin-bottom:6px;color:var(--ink-2)}
.field .req{color:var(--red)}
.field input,.field select,.field textarea{
  width:100%;padding:11px 12px;border:1px solid var(--line-2);border-radius:9px;
  font:inherit;font-size:15px;background:#fcfdff;color:var(--ink);transition:border-color .15s ease,box-shadow .15s ease;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,87,194,.12);
}
.field textarea{resize:vertical;min-height:96px}
.hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.fine{font-size:12.5px;color:var(--muted);margin:11px 0 0}
.fine a{color:var(--brand)}
.fmsg{margin-top:12px;padding:12px 14px;border-radius:9px;font-size:14px;display:none}
.fmsg.ok{display:block;background:#ecfdf3;border:1px solid #bbf7d0;color:#14532d}
.fmsg.bad{display:block;background:#fef2f2;border:1px solid #fecaca;color:#991b1b}
.form-side{display:grid;gap:10px;margin-top:18px}
.form-side .side-item{display:flex;gap:9px;align-items:flex-start;font-size:13px;color:var(--muted)}
.form-side svg{width:17px;height:17px;flex:none;color:var(--brand);margin-top:2px}

/* ---------- 内页 hero ---------- */
.phero{
  background:
    radial-gradient(700px 320px at 85% 15%, rgba(24,168,201,.16), transparent 60%),
    linear-gradient(135deg,var(--navy),var(--navy-2));
  color:#fff;padding:54px 0 46px;
}
.phero h1{color:#fff;font-size:clamp(27px,3.6vw,40px);margin:10px 0 12px}
.phero .lead{color:#c6d8ef;max-width:820px}
.phero .tag{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);color:#cfe2ff;font-size:12.5px;font-weight:600}
.phero .hb{display:flex;gap:11px;flex-wrap:wrap;margin-top:22px}
.crumb{font-size:12.5px;color:var(--muted);padding:12px 0 0}
.crumb a{color:var(--brand)}
.crumb span{color:var(--muted-2)}
.phero .crumb{color:#9fb8d8}
.phero .crumb a{color:#cfe2ff}

/* 锚点导航 */
.anchors{
  display:flex;gap:8px;flex-wrap:wrap;padding:14px 0 0;
}
.anchors a{
  font-size:13px;padding:7px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);
  color:var(--ink-2);font-weight:600;
}
.anchors a:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-l);text-decoration:none}

/* 产品区块 */
.prod{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px;box-shadow:var(--sh);scroll-margin-top:100px;
}
.prod + .prod{margin-top:16px}
.prod-head{display:flex;align-items:flex-start;gap:16px;flex-wrap:wrap;margin-bottom:12px}
.prod-head .picon{width:48px;height:48px;border-radius:13px;background:var(--brand-l);color:var(--brand);display:grid;place-items:center;flex:none}
.prod-head .picon svg{width:25px;height:25px}
.prod-head h3{margin:0 0 4px;font-size:22px}
.prod-head .sub{color:var(--muted);font-size:14px}
.prod-meta{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin:16px 0}
.prod-meta div{background:#f7faff;border:1px solid var(--line);border-radius:10px;padding:12px 14px}
.prod-meta b{display:block;font-size:12px;color:var(--muted);font-weight:600;margin-bottom:3px}
.prod-meta span{font-size:14px;color:var(--ink-2);font-weight:600}
.prod .plist{margin:0 0 14px;padding-left:1.2em;color:var(--ink-2);font-size:14.5px}
.prod .plist li{margin:.3em 0}
.prod .pcta{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}

/* 页脚 */
.ft{background:#071426;color:#b9c7db;padding:52px 0 0}
.ftin{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:32px;padding-bottom:34px}
.ft h4{color:#fff;font-size:14.5px;margin:0 0 12px;letter-spacing:.5px}
.ft ul{list-style:none;padding:0;margin:0}
.ft li{margin:7px 0;font-size:13.5px}
.ft a{color:#b9c7db;text-decoration:none}
.ft a:hover{color:#fff;text-decoration:underline}
.ft .flogo{display:flex;align-items:center;gap:10px;margin-bottom:12px}
.ft .flogo .logo-name{color:#fff;font-size:19px}
.ft .flogo .logo-sub{color:#8fa4bf}
.ft p{font-size:13px;color:#8fa4bf;margin:0 0 10px}
.ftbt{border-top:1px solid #1b2d49;padding:16px 0 22px;font-size:12.5px;color:#7f90a8;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
.ftbt a{color:#9fb3cc}

/* 浮动与移动底栏 */
.fab{position:fixed;right:20px;bottom:28px;z-index:70;display:flex;flex-direction:column;gap:10px}
.fab a{
  width:52px;height:52px;border-radius:14px;display:grid;place-items:center;
  background:#fff;border:1px solid var(--line);box-shadow:var(--sh-lg);color:var(--brand);
  transition:.18s ease;
}
.fab a:hover{transform:translateY(-2px);background:var(--brand-l);text-decoration:none}
.fab a.red{background:var(--red);border-color:var(--red);color:#fff}
.fab svg{width:23px;height:23px}
.mobilebar{display:none}
@media(max-width:900px){
  .fab{display:none}
  .mobilebar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:75;gap:8px;
    background:rgba(255,255,255,.97);border-top:1px solid var(--line);padding:8px 10px calc(8px + env(safe-area-inset-bottom));
    -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  }
  .mobilebar a{
    flex:1;display:flex;align-items:center;justify-content:center;gap:6px;
    padding:11px 8px;border-radius:9px;font-size:13.5px;font-weight:700;text-decoration:none;
    background:#f1f5fb;color:var(--ink-2);
  }
  .mobilebar a.main{background:var(--red);color:#fff}
  .mobilebar svg{width:17px;height:17px}
  body{padding-bottom:66px}
}

/* 面包屑 / 小标签 */
.pill{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;border-radius:999px;background:var(--brand-l);color:var(--brand-d);font-size:12px;font-weight:700}
.pill.gray{background:#f1f5fb;color:var(--muted)}
.pill.red{background:#fef2f2;color:#b91c1c}

/* 分栏 */
.split{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start}
.split .sticky{position:sticky;top:100px}

/* 相关链接 */
.related{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.related a{
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px;
  color:var(--ink);font-weight:700;font-size:14.5px;display:flex;align-items:center;justify-content:space-between;gap:10px;
}
.related a:hover{border-color:var(--brand);background:var(--brand-l);color:var(--brand-d);text-decoration:none}
.related a span{font-size:12px;color:var(--muted);font-weight:400;text-align:right;line-height:1.45}
.related svg{width:17px;height:17px;color:var(--brand);flex:none}

/* 动效：内容默认可见。B2B 站优先保证可读性与抓取，不做“JS 没跑完就看不见”的入场动画。 */
.reveal{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .topo .flow{animation:none}
  .btn:hover{transform:none}
}

/* ---------- 响应式 ---------- */
@media(max-width:1100px){
  .nav a{padding:8px 9px;font-size:14px}
  .hphone{display:none}
  .hero-in{grid-template-columns:1fr .9fr;gap:30px}
  .g5{grid-template-columns:repeat(3,minmax(0,1fr))}
  .why{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:980px){
  .nav{
    display:none;position:absolute;top:76px;left:0;right:0;z-index:79;
    background:#fff;border-bottom:1px solid var(--line);padding:10px 20px 16px;
    flex-direction:column;align-items:stretch;gap:2px;box-shadow:0 18px 30px rgba(14,27,46,.1);
  }
  body.navopen .nav{display:flex}
  .nav a{padding:12px 12px;font-size:15px}
  .burger{display:block}
  .hact .hbtn{display:none}
  .hdin{gap:14px}
  .logo-sub{display:none}
  .hero-in{grid-template-columns:1fr;padding:54px 0 48px}
  .topo{max-width:600px;margin:0 auto}
  .g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .form-wrap{grid-template-columns:1fr;gap:28px}
  .split{grid-template-columns:1fr}
  .split .sticky{position:static}
  .ftin{grid-template-columns:1fr 1fr}
}
@media(max-width:720px){
  .sec{padding:48px 0}
  .hero .hs{font-size:15.5px}
  .htrust{grid-template-columns:1fr}
  .g2,.g3,.g4,.g5{grid-template-columns:1fr}
  .g5.districts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .districts{grid-template-columns:repeat(2,minmax(0,1fr))}
  .sol-grid{grid-template-columns:1fr}
  .why{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .related{grid-template-columns:1fr}
  .prod-meta{grid-template-columns:1fr}
  .frow{grid-template-columns:1fr}
  .form-card{padding:20px}
  .cta-band{padding:28px 22px}
  .cta-band h2{font-size:22px}
  .ftin{grid-template-columns:1fr}
  .fa{padding-left:18px}
  .logo-name{font-size:18px}
  .hdin{height:68px}
  .nav{top:68px}
  table{min-width:640px}
}
@media(max-width:420px){
  .wrap{padding:0 15px}
  .btn.lg{padding:12px 18px;font-size:15px}
  .hbtns .btn{width:100%}
  .steps{grid-template-columns:1fr}
}