/* DTD · 深圳鼎通达供应链 官网 — tech-forwarder visual system */
:root{
  --navy:#071029; --navy2:#0d1b3e; --navy3:#122a5c;
  --blue:#1a3cff; --cyan:#00c2ff; --orange:#ff6a3d; --teal:#00c2a8;
  --ink:#0f1626; --body:#2a3346; --muted:#66708a; --line:#e3e9f4;
  --bg:#f6f8fc; --card:#fff;
  --sans:"Archivo","Microsoft YaHei","PingFang SC","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono","SFMono-Regular",Consolas,monospace;
  --radius:14px; --shadow:0 18px 50px -24px rgba(15,29,74,.35);
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--body);font-family:var(--sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{margin:0 0 .5em;color:var(--ink);line-height:1.2;letter-spacing:-.01em;font-weight:800}
h1{font-size:clamp(34px,5vw,58px)}
h2{font-size:clamp(26px,3.2vw,38px)}
h3{font-size:20px}
p{margin:0 0 1em}
ul{margin:0 0 1em;padding-left:1.2em}
.muted{color:var(--muted)}
.container{max-width:var(--max);margin:0 auto;padding:0 22px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--orange);color:#fff;padding:10px 16px;z-index:200}
.skip-link:focus{left:12px;top:12px}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:box-shadow .25s,border-color .25s}
.site-header.scrolled{box-shadow:0 10px 30px -18px rgba(9,20,52,.35);border-color:var(--line)}
.nav-wrap{display:flex;align-items:center;gap:26px;height:74px}
.brand{display:flex;align-items:center;gap:11px;flex:none}
.brand-mark{display:grid;place-items:center;width:44px;height:44px;border-radius:11px;color:#fff;font-weight:800;font-size:14px;letter-spacing:.04em;background:linear-gradient(135deg,var(--blue),var(--cyan));box-shadow:0 8px 20px -10px rgba(26,60,255,.8)}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-size:16px;color:var(--ink)}
.brand-text small{font-family:var(--mono);font-size:9.5px;letter-spacing:.24em;color:var(--muted)}
.main-nav{display:flex;gap:22px;margin-left:auto}
.main-nav a{font-size:14.5px;font-weight:600;color:#33405c;position:relative;padding:6px 0}
.main-nav a:after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:width .25s}
.main-nav a:hover:after{width:100%}
.nav-actions{display:flex;align-items:center;gap:12px}
.lang-switch{font-size:13px;font-weight:700;padding:6px 10px;border:1px solid var(--line);border-radius:999px;color:#33405c}
.lang-switch:hover{border-color:var(--blue);color:var(--blue)}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:0;padding:8px;cursor:pointer}
.nav-toggle span{width:22px;height:2px;background:var(--ink);transition:.25s}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14.5px;padding:13px 22px;border-radius:10px;border:1px solid transparent;cursor:pointer;transition:transform .18s,box-shadow .18s,background .18s;white-space:nowrap}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:linear-gradient(135deg,var(--blue),#3f7bff);color:#fff;box-shadow:0 14px 28px -14px rgba(26,60,255,.75)}
.btn-primary:hover{box-shadow:0 18px 34px -14px rgba(26,60,255,.9)}
.btn-accent{background:var(--orange);color:#fff;box-shadow:0 14px 28px -14px rgba(255,106,61,.8)}
.btn-outline{border-color:#c9d3e6;color:var(--ink);background:#fff}
.btn-outline-light{border-color:rgba(255,255,255,.55);color:#fff;background:transparent}
.btn-outline-light:hover{background:rgba(255,255,255,.12)}
.btn-sm{padding:10px 16px;font-size:13.5px}
.btn-block{width:100%}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(1100px 500px at 78% 12%,#1b4bff 0%,#0a1b45 42%,#050d22 100%)}
.hero:before{content:"";position:absolute;inset:0;opacity:.16;background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);background-size:54px 54px;mask-image:linear-gradient(to bottom,rgba(0,0,0,.9),transparent 85%)}
.hero:after{content:"";position:absolute;right:-140px;top:-120px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(0,194,255,.4),transparent 62%);filter:blur(10px)}
.hero-inner{position:relative;z-index:2;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding:78px 0 64px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:#9fd8ff;border:1px solid rgba(159,216,255,.35);border-radius:999px;padding:7px 13px;margin-bottom:20px}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px rgba(0,194,255,.18)}
.hero h1{color:#fff;margin-bottom:18px}
.hero h1 .accent{background:linear-gradient(100deg,var(--cyan),#7be0ff 60%,#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{font-size:17.5px;color:#c6d4ee;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.hero-panel{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:18px;padding:22px;backdrop-filter:blur(10px);box-shadow:var(--shadow)}
.hero-panel h4{color:#fff;font-size:12px;font-family:var(--mono);letter-spacing:.16em;text-transform:uppercase;color:#9fd8ff;margin-bottom:14px}
.route-line{display:flex;align-items:center;gap:10px;font-size:13.5px;color:#dfe8f8;padding:9px 0;border-bottom:1px dashed rgba(255,255,255,.14)}
.route-line:last-child{border-bottom:0}
.route-line .dot{width:8px;height:8px;border-radius:50%;background:var(--cyan);flex:none}
.route-line .days{margin-left:auto;font-family:var(--mono);font-size:12px;color:#8fb7e8}

/* ---------- sections ---------- */
.section{padding:72px 0}
.section.tight{padding:52px 0}
.section-head{max-width:720px;margin-bottom:34px}
.eyebrow-dark{font-family:var(--mono);font-size:11.5px;letter-spacing:.18em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
.section-head h2{margin-bottom:10px}
.section-head p{color:var(--muted);font-size:16px}

/* stat bar */
.stats{background:var(--navy);color:#fff;border-radius:18px;padding:30px 26px;display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:-34px;position:relative;z-index:3;box-shadow:var(--shadow)}
.stat b{display:block;font-size:clamp(26px,3vw,36px);line-height:1;color:#fff;font-family:var(--mono)}
.stat b span{color:var(--cyan);font-size:18px;margin-left:3px}
.stat small{display:block;margin-top:7px;color:#9fb2d4;font-size:12.5px;letter-spacing:.02em}

/* grids & cards */
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;transition:transform .22s,box-shadow .22s,border-color .22s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#cfdcf3}
.card .icon{display:grid;place-items:center;width:44px;height:44px;border-radius:11px;background:linear-gradient(135deg,#e8efff,#e6fbff);color:var(--blue);font-size:19px;margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:7px}
.card p{font-size:14.5px;color:var(--muted);margin:0}
.card .more{display:inline-block;margin-top:14px;font-size:13px;font-weight:700;color:var(--blue)}

/* lanes table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table.lanes{width:100%;border-collapse:collapse;font-size:14px;min-width:640px}
table.lanes th{background:#f1f5fd;text-align:left;padding:13px 16px;font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:#4a5876;font-weight:700}
table.lanes td{padding:14px 16px;border-top:1px solid var(--line);vertical-align:middle}
table.lanes tr:hover td{background:#fbfcff}
.badge{display:inline-block;font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:999px;background:#e8f7ef;color:#137a44}
.badge.rail{background:#eef0ff;color:#3742c9}
.badge.air{background:#fff0ea;color:#b8451f}
.mono{font-family:var(--mono);font-size:13px}

/* dark band */
.dark-band{background:radial-gradient(900px 400px at 15% 0%,#15306b 0%,#0a1738 45%,#050d22 100%);color:#fff;border-radius:0}
.dark-band h2,.dark-band h3{color:#fff}
.dark-band p{color:#b9c8e4}
.dark-band .card{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.14)}
.dark-band .card h3{color:#fff}
.dark-band .card p{color:#b9c8e4}
.dark-band .card .icon{background:rgba(0,194,255,.14);color:#7be0ff}

/* CTA band */
.cta-band{background:linear-gradient(110deg,#0a1738,#16346f 55%,#1a3cff);color:#fff;padding:54px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band h2{color:#fff;margin-bottom:6px;font-size:clamp(24px,3vw,32px)}
.cta-band p{color:#c6d4ee;margin:0}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* forms */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:12.5px;font-weight:700;color:#3a4661;letter-spacing:.02em}
.field input,.field select,.field textarea{font-family:inherit;font-size:14.5px;padding:11px 13px;border:1px solid #ccd6e8;border-radius:9px;background:#fff;color:var(--ink);transition:border-color .18s,box-shadow .18s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(26,60,255,.12)}
.field .error{color:#d32f2f;font-size:12px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;box-shadow:var(--shadow)}
.form-note{font-size:12.5px;color:var(--muted);margin-top:14px}

/* page content */
.page-hero{background:linear-gradient(110deg,#0a1738,#16346f);color:#fff;padding:64px 0 54px}
.page-hero h1{color:#fff;font-size:clamp(30px,4vw,46px)}
.page-hero p{color:#c6d4ee;max-width:680px}
.prose{max-width:820px}
.prose h2{margin-top:34px;font-size:24px}
.prose h3{margin-top:26px}
.prose ul{color:var(--body)}
.prose p{color:#3b4762}

/* testimonial / partners */
.quote-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.quote-card p{font-size:15px;color:#33405c;font-style:italic}
.quote-card .who{font-size:13px;color:var(--muted)}
.logo-row{display:flex;flex-wrap:wrap;gap:14px}
.logo-chip{border:1px solid var(--line);background:#fff;border-radius:10px;padding:12px 18px;font-weight:700;color:#5b6885;font-size:13.5px}

/* footer */
.site-footer{background:var(--navy);color:#aebbd6;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr .8fr 1fr .8fr;gap:34px;padding-bottom:38px}
.site-footer h3,.site-footer h4{color:#fff}
.site-footer h3{font-size:16px;margin:10px 0 6px}
.site-footer h4{font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:#7d90b8;margin-bottom:14px}
.site-footer a{display:block;font-size:14px;padding:4px 0;color:#c3cfe6}
.site-footer a:hover{color:var(--cyan)}
.site-footer .muted{color:#7d90b8;font-size:13px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;padding:18px 22px;font-size:12.5px;color:#7d90b8}

/* floating CTA */
.floating-cta{position:fixed;right:22px;bottom:22px;z-index:90;display:none}

/* alerts */
.messages{list-style:none;padding:0;margin:0}
.alert{background:#e8f7ef;border:1px solid #bfe9cf;color:#137a44;padding:12px 16px;border-radius:10px;margin:14px 0}

/* reveal animation */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}.btn:hover,.card:hover{transform:none}}

/* responsive */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:30px;padding:56px 0 48px}
  .g4{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  .nav-toggle{display:flex}
  .main-nav{position:absolute;left:0;right:0;top:74px;background:#fff;flex-direction:column;gap:0;padding:8px 22px 16px;border-bottom:1px solid var(--line);box-shadow:0 20px 30px -22px rgba(9,20,52,.4);display:none}
  .main-nav.open{display:flex}
  .main-nav a{padding:11px 0;border-bottom:1px solid #f0f3fa;font-size:15px}
  .nav-actions .btn-sm{display:none}
  .g2,.g3,.g4,.form-grid{grid-template-columns:1fr}
  .stats{margin-top:-20px}
  .section{padding:52px 0}
  .floating-cta{display:block}
  .cta-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:22px}
}