/* trade.251w.com - 外贸建站业务站 · 内容宽 1600px */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --ink:#102a43;
  --muted:#486581;
  --line:#d9e2ec;
  --bg:#f5f7fa;
  --paper:#fff;
  --brand:#0c6eb8;
  --brand-deep:#08508a;
  --accent:#c45c26;
  --radius:12px;
  --font:"Noto Sans SC","PingFang SC","Segoe UI","Microsoft YaHei",sans-serif;
  --display:"Noto Serif SC","Noto Sans SC","Songti SC",serif;
}
body{font-family:var(--font);color:var(--muted);background:
  radial-gradient(ellipse 70% 40% at 0% 0%,rgba(12,110,184,.08),transparent),
  radial-gradient(ellipse 50% 30% at 100% 0%,rgba(196,92,38,.06),transparent),
  var(--bg);line-height:1.75;-webkit-font-smoothing:antialiased}
.container{max-width:1600px;margin:0 auto;padding:0 28px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 22px;border-radius:10px;font-weight:700;font-size:14px;border:none;cursor:pointer;transition:.2s}
.btn-sm{min-height:38px;padding:0 14px;font-size:13px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-deep)}
.btn-line{background:transparent;border:1.5px solid var(--brand);color:var(--brand)}
.btn-line:hover{background:var(--brand);color:#fff}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.35)}
.btn-ghost:hover{background:#fff;color:var(--brand-deep)}

.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.95);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;height:72px;gap:20px}
.logo{display:flex;align-items:center;gap:12px}
.logo-mark{width:42px;height:42px;border-radius:11px;background:linear-gradient(145deg,#2b8fd4,#0c6eb8);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;line-height:1}
.logo-text{display:flex;flex-direction:column;gap:2px;line-height:1.1}
.logo-text b{color:var(--ink);font-size:18px}
.logo-text small{font-size:12px;color:var(--muted)}
.nav{display:flex;gap:2px;margin-left:20px;flex-wrap:wrap}
.nav a{padding:8px 12px;border-radius:8px;color:var(--ink);font-size:14px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.nav a i{font-size:16px;opacity:.85}
.nav a:hover,.nav a.active{background:#e6f1f8;color:var(--brand)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}
.lang-switch{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700}
.lang-switch a{color:var(--brand)}
.lang-current{color:var(--ink);padding:4px 8px;background:#e6f1f8;border-radius:6px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px}
.burger span{width:22px;height:2px;background:var(--ink)}

.hero{position:relative;color:#fff;padding:92px 0 84px;overflow:hidden;isolation:isolate;background:#042a4a}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:url(/images/bg-hero.jpg) right center/cover no-repeat;
  transform:scale(1.04);
}
.hero-bg::after{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 48% 80% at 88% 45%, rgba(43,143,212,.18), transparent 58%),
    linear-gradient(105deg, rgba(4,42,74,.82) 0%, rgba(6,53,88,.58) 42%, rgba(12,110,184,.38) 72%, rgba(12,110,184,.28) 100%);
}
.hero-bg::before{
  content:"";position:absolute;inset:0;opacity:.1;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.1) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.1) 1px, transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:linear-gradient(90deg,#000 0%,#000 55%,transparent 100%);
  mask-image:linear-gradient(90deg,#000 0%,#000 55%,transparent 100%);
}
.hero-inner{position:relative;z-index:1;max-width:900px}
.eyebrow{font-size:13px;letter-spacing:.06em;font-weight:700;color:#f0c27a;margin-bottom:14px}
.hero h1{font-family:var(--display);font-size:clamp(30px,3.6vw,46px);line-height:1.22;color:#fff;margin-bottom:16px;font-weight:700}
.lead{font-size:17px;color:rgba(255,255,255,.9);margin-bottom:28px;max-width:42em}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px}

.section{padding:80px 0}
.sec-soft{position:relative;isolation:isolate;overflow:hidden;background:transparent}
.sec-soft::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:url(/images/bg-section.jpg) center/cover no-repeat;
  opacity:.32;pointer-events:none;
}
.sec-soft::after{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(238,244,249,.72),rgba(245,248,252,.84));
}
.sec-soft > .container{position:relative;z-index:1}
.sec-band{position:relative;isolation:isolate;overflow:hidden;background:transparent}
.sec-band::before{
  content:"";position:absolute;inset:0;z-index:0;
  background:url(/images/bg-hero.jpg) center/cover no-repeat;
  opacity:.24;pointer-events:none;
}
.sec-band::after{
  content:"";position:absolute;inset:0;z-index:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(245,248,252,.78),rgba(238,244,249,.88));
}
.sec-band > .container{position:relative;z-index:1}
.sec-title{font-size:clamp(24px,2.4vw,32px);color:var(--ink);margin-bottom:28px}
.sec-row{display:flex;justify-content:space-between;align-items:end;gap:16px;margin-bottom:24px}
.sec-row .sec-title{margin:0}
.more{color:var(--brand);font-weight:700}
.card-grid{display:grid;gap:20px}
.card-grid.three{grid-template-columns:repeat(3,1fr)}
.card-grid.four{grid-template-columns:repeat(4,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px}
.card.compact{padding:20px}
.card h2,.card h3,.card h4{color:var(--ink);margin-bottom:8px;font-size:17px;line-height:1.35}
.card h2{font-size:18px}
.card p{font-size:14px}
.feat-block{margin-bottom:36px}
.feat-group{font-size:20px;color:var(--brand-deep);margin-bottom:16px;padding-left:12px;border-left:3px solid var(--accent)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;position:relative;text-align:center}
.step-n{font-size:28px;font-weight:800;color:var(--accent);display:block;margin-bottom:10px}
.step-card h3{color:var(--ink);margin-bottom:8px}
.step-card p{margin:0 auto}
.cta-band{position:relative;color:#fff;padding:56px 0;text-align:center;background:
  linear-gradient(100deg,rgba(8,80,138,.9),rgba(12,110,184,.88)),
  url(/images/bg-hero.jpg) center/cover no-repeat}
.cta-band h2 i{margin-right:8px;vertical-align:-2px}
.cta-band h2{font-size:28px;color:#fff;margin-bottom:10px}
.cta-band p{margin-bottom:20px;color:rgba(255,255,255,.9)}
.page-hero{
  background:
    linear-gradient(120deg, rgba(6,53,88,.9), rgba(12,110,184,.86)),
    url(/images/bg-hero.jpg) center/cover no-repeat;
  color:#fff;padding:64px 0 56px;position:relative;overflow:hidden;
}
.page-hero h1 i{margin-right:10px;vertical-align:-3px;opacity:.9}
.page-hero{text-align:center}
.page-hero h1{font-family:var(--display);font-size:clamp(28px,3.2vw,40px);color:#fff;letter-spacing:.01em}
.page-hero p{margin:12px auto 0;color:rgba(255,255,255,.9);max-width:46em;font-size:16px}
.prose{max-width:920px}
.prose p{margin-bottom:14px;font-size:16px}
.check-list{margin:14px 0 28px;padding-left:0;list-style:none}
.check-list li{margin:10px 0;padding-left:0;position:relative;display:flex;align-items:flex-start;gap:10px}
.check-list li i{color:var(--brand);font-size:18px;margin-top:2px;flex-shrink:0}
.check-list li::before{display:none}
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:40px}
.contact-form label{display:block;margin-bottom:14px;font-size:13px;font-weight:700;color:var(--ink)}
.contact-form input,.contact-form textarea{display:block;width:100%;margin-top:6px;border:1px solid var(--line);border-radius:10px;padding:12px 14px;font:inherit}
.hint{font-size:12px;margin-top:10px}
.wx-img{margin:16px 0;border:1px solid var(--line);border-radius:10px;padding:8px;background:#fff;width:160px}
.footer{background:#102a43;color:rgba(255,255,255,.86);padding:52px 0 0;margin-top:12px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:28px;padding-bottom:28px}
.footer b{display:block;color:#fff;font-size:17px;margin-bottom:10px}
.footer h4{color:#fff;margin-bottom:12px;font-size:14px}
.footer a{display:flex;align-items:center;gap:8px;padding:4px 0;font-size:13px}
.footer a i,.footer p i,.footer b i,.footer h4 i{opacity:.85}
.footer h4{display:flex;align-items:center;gap:8px}
.footer p{display:flex;align-items:flex-start;gap:8px}
.footer a:hover{color:#fff;text-decoration:underline}
.footer .muted{font-size:12px;opacity:.8;margin-top:8px}
.footer-copy{border-top:1px solid rgba(255,255,255,.14);padding:16px 0 28px;text-align:center;font-size:12px}
.friend-links{background:#fff;border-top:1px solid var(--line);padding:28px 0}
.friend-links-title{font-size:15px;color:var(--ink);margin-bottom:12px}
.friend-links-list{display:flex;flex-wrap:wrap;gap:10px 18px;list-style:none}
.friend-links-list a{font-size:13px;color:var(--muted)}
.friend-links-list a:hover{color:var(--brand)}
@media (max-width:1100px){
  .card-grid.four,.card-grid.three,.steps-grid{grid-template-columns:1fr 1fr}
  .nav{display:none;position:fixed;inset:0 0 0 auto;width:min(300px,86vw);background:#fff;flex-direction:column;padding:80px 18px 24px;box-shadow:-8px 0 24px rgba(0,0,0,.12);z-index:120}
  .nav.open{display:flex}
  .burger{display:flex}
  .header-actions .btn{display:none}
}
@media (max-width:720px){
  .card-grid.four,.card-grid.three,.steps-grid,.contact-grid,.footer-grid{grid-template-columns:1fr}
  .container{padding:0 16px}
  .hero{padding:64px 0}
}

.contact-simple{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.contact-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;text-align:center}
.contact-card .wx-img{margin-left:auto;margin-right:auto}
.contact-card .btn{margin-top:8px}
.contact-card h2{color:var(--ink);font-size:20px;margin-bottom:12px}
.contact-id{font-size:18px;font-weight:700;color:var(--brand-deep);margin-bottom:14px}
.contact-id a{color:var(--brand-deep)}
@media (max-width:900px){.contact-simple{grid-template-columns:1fr}}

.card .link{display:inline-block;margin-top:12px;color:var(--brand);font-weight:700;font-size:14px}
.page-hero .eyebrow a,.detail-kicker{color:#f0c27a}

/* ---- 详情页视觉 ---- */
.detail-hero{position:relative;color:#fff;padding:72px 0 64px;overflow:hidden;min-height:360px;display:flex;align-items:center}
.detail-hero-bg{
  position:absolute;inset:0;
  background:
    radial-gradient(ellipse 50% 70% at 85% 30%, rgba(240,194,122,.22), transparent 55%),
    linear-gradient(125deg, rgba(4,42,74,.92) 0%, rgba(12,110,184,.88) 42%, rgba(26,126,196,.84) 100%),
    url(/images/bg-hero.jpg) center/cover no-repeat;
}
.detail-hero-bg::after{
  content:"";position:absolute;inset:0;opacity:.18;
  background-image:linear-gradient(rgba(255,255,255,.07) 1px, transparent 1px),linear-gradient(90deg, rgba(255,255,255,.07) 1px, transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:linear-gradient(90deg, transparent, #000 20%, #000 80%, transparent);
  mask-image:linear-gradient(90deg, transparent, #000 20%, #000 80%, transparent);
}
.feature-hero .detail-hero-bg{
  background:
    radial-gradient(ellipse 45% 60% at 80% 40%, rgba(196,92,38,.2), transparent 55%),
    linear-gradient(125deg, rgba(4,42,74,.92) 0%, rgba(10,74,120,.88) 45%, rgba(12,110,184,.86) 100%),
    url(/images/bg-section.jpg) center/cover no-repeat;
}
.detail-hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.35fr .85fr;gap:48px;align-items:center;width:100%}
.crumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px;color:rgba(255,255,255,.7);margin-bottom:18px}
.crumb a{color:#f0c27a;font-weight:600}
.crumb a:hover{text-decoration:underline}
.detail-kicker{font-size:13px;letter-spacing:.14em;font-weight:700;margin-bottom:12px;color:#f0c27a}
.detail-hero h1{font-family:var(--display);font-size:clamp(32px,4vw,52px);line-height:1.18;color:#fff;font-weight:700;margin-bottom:16px;max-width:16em}
.detail-lead{font-size:18px;line-height:1.7;color:rgba(255,255,255,.9);max-width:36em;margin-bottom:28px}
.detail-hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.aside-panel{
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);
  backdrop-filter:blur(8px);border-radius:18px;padding:32px 28px;
}
.aside-label{display:block;font-size:12px;letter-spacing:.12em;color:#f0c27a;font-weight:700;margin-bottom:10px}
.aside-panel strong{display:block;font-size:22px;color:#fff;line-height:1.35;margin-bottom:12px}
.aside-panel p{font-size:14px;color:rgba(255,255,255,.82);line-height:1.75;margin:0}

.detail-intro{padding-top:64px;padding-bottom:40px}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.intro-block{
  background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:32px 28px;
  border-top:4px solid var(--brand);position:relative;text-align:center;
  box-shadow:0 8px 24px rgba(16,42,67,.04);
}
.intro-ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:48px;height:48px;border-radius:12px;margin:0 auto 12px;
  background:linear-gradient(145deg,#e6f1f8,#d0e6f4);color:var(--brand-deep);font-size:24px;
}
.intro-n{display:block;font-size:13px;font-weight:800;color:var(--accent);letter-spacing:.08em;margin-bottom:12px}
.intro-block p{margin:0 auto;font-size:16px;color:var(--ink);line-height:1.85;max-width:36em}

.sec-head-detail{margin:0 auto 32px;max-width:720px;text-align:center}
.sec-head-detail h2{font-family:var(--display);font-size:clamp(26px,2.8vw,34px);color:var(--ink);margin-top:8px;line-height:1.25}
.eyebrow.dark{color:var(--brand);font-size:13px;letter-spacing:.1em;font-weight:700}

.point-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.point-tile{
  background:var(--paper);border:1px solid var(--line);border-radius:16px;padding:26px 22px 24px;
  transition:border-color .2s, transform .2s;text-align:center;
}
.point-tile:hover{border-color:#9bbfd9;transform:translateY(-2px)}
.point-n{display:block;font-size:28px;font-weight:800;color:var(--brand);opacity:.35;line-height:1;margin-bottom:14px}
.point-tile h3{font-size:16px;color:var(--ink);font-weight:700;line-height:1.55;margin:0}

.module-track{display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:14px 10px}
.module-step{
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;
  background:var(--paper);border:1px solid var(--line);text-align:center;
  border-radius:18px;padding:22px 20px 18px;min-width:150px;min-height:132px;
  box-shadow:0 8px 20px rgba(16,42,67,.04);transition:border-color .2s,transform .2s;
}
.module-step:hover{border-color:#9bbfd9;transform:translateY(-2px)}
.module-step .module-n{
  width:34px;height:34px;border-radius:50%;background:linear-gradient(145deg,#2b8fd4,#0c6eb8);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;
}
.module-step > i{font-size:26px;color:var(--brand-deep);line-height:1}
.module-step b{color:var(--ink);font-size:15px;font-weight:700}
.module-arrow{width:28px;height:2px;background:linear-gradient(90deg,var(--brand),transparent);display:inline-block;flex:0 0 28px}

.detail-cta{
  background:
    radial-gradient(ellipse 50% 80% at 0% 50%, rgba(240,194,122,.16), transparent),
    linear-gradient(100deg,rgba(6,53,88,.92),rgba(12,110,184,.88) 55%,rgba(13,106,173,.9)),
    url(/images/bg-section.jpg) center/cover no-repeat;
  color:#fff;padding:56px 0;
}
.detail-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.detail-cta h2{font-size:clamp(24px,2.5vw,32px);color:#fff;margin-bottom:8px}
.detail-cta p{color:rgba(255,255,255,.88);margin:0;max-width:36em}

@media (max-width:1100px){
  .detail-hero-grid,.intro-grid,.point-grid{grid-template-columns:1fr 1fr}
  .detail-hero-aside{display:none}
  .detail-hero-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .intro-grid,.point-grid{grid-template-columns:1fr}
  .detail-hero{padding:56px 0 48px}
  .module-arrow{display:none}
  .detail-cta-inner{flex-direction:column;align-items:center;text-align:center}
}


/* ---- 图标与质感 ---- */
.lang-current{display:inline-flex;align-items:center;gap:4px}
.sec-title{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.sec-ico{color:var(--brand);font-size:1.05em}
.card-with-ico{position:relative;text-align:center}
.card-with-ico .link{justify-content:center}
.card-ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:48px;height:48px;border-radius:12px;margin:0 auto 14px;
  background:linear-gradient(145deg,#e6f1f8,#d0e6f4);color:var(--brand-deep);font-size:24px;
}
.card-ico.sm{width:40px;height:40px;font-size:20px;border-radius:10px;margin-bottom:12px}
.contact-card .card-ico{background:linear-gradient(145deg,#2b8fd4,#0c6eb8);color:#fff}
.step-ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;border-radius:12px;margin:0 auto 12px;
  background:linear-gradient(145deg,#2b8fd4,#0c6eb8);color:#fff;font-size:22px;
}
.aside-ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:56px;height:56px;border-radius:14px;margin-bottom:16px;
  background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.25);font-size:28px;color:#f0c27a;
}
.detail-kicker i{margin-right:6px;vertical-align:-2px}
.point-ico{display:block;color:var(--brand);font-size:22px;margin:0 auto 8px;line-height:1}
.point-tile .point-n{margin-bottom:10px}
.btn i{font-size:1.1em}
.more{display:inline-flex;align-items:center;gap:4px}
.card .link{display:inline-flex;align-items:center;gap:2px}
.hero .btn-line,.page-hero .btn-line,.detail-hero .btn-line,.cta-band .btn-line,.detail-cta .btn-line{background:transparent;border-color:rgba(255,255,255,.7);color:#fff}
.hero .btn-line:hover,.page-hero .btn-line:hover,.detail-hero .btn-line:hover,.cta-band .btn-line:hover,.detail-cta .btn-line:hover{background:#fff;color:var(--brand-deep)}

.sec-title-center{justify-content:center;text-align:center;width:100%;margin-left:auto;margin-right:auto}
.eyebrow.dark{justify-content:center}
.sec-head-detail .eyebrow.dark{display:inline-block}

.about-wrap{max-width:880px;margin:0 auto;text-align:center}
.about-lead{margin-bottom:28px}
.about-lead p{font-size:16px;line-height:1.9;color:var(--muted);margin:0 0 14px}
.about-panel{
  background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:36px 28px 28px;
  box-shadow:0 10px 28px rgba(16,42,67,.05);margin-bottom:28px;
}
.about-panel .sec-title{margin-bottom:22px;justify-content:center}
.check-list-center{max-width:560px;margin:0 auto;text-align:left}
.check-list-center li{justify-content:flex-start}
.about-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:12px}
@media (max-width:720px){
  .module-track{gap:12px}
  .module-arrow{display:none}
  .about-panel{padding:28px 18px}
}