:root{
  --ink:#1e2833;          /* 深青灰墨色 */
  --paper:#f4f1ea;        /* 水泥米白 */
  --blue:#1d5b8c;         /* 海关蓝（来自关单印章蓝） */
  --blue-deep:#123a5a;
  --stamp:#c2703d;        /* 印章赭色，仅用于强调 */
  --line:#2b3947;
  --muted:#5c6a76;
  --fs-hero:clamp(2rem,5vw,3.4rem);
  --fs-h2:1.6rem;
  --fs-lead:1.15rem;
  --fs-body:1rem;
  --fs-small:.82rem;
  --sp:24px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Source Han Sans SC","Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;background:var(--paper);color:var(--ink);line-height:1.8;font-size:var(--fs-body)}
.container{max-width:1280px;margin:0 auto;padding:0 var(--sp)}
h1{font-size:var(--fs-hero);font-weight:800;line-height:1.25;letter-spacing:.02em}
h2{font-size:var(--fs-h2);font-weight:700;border-left:6px solid var(--blue);padding-left:12px;margin:48px 0 var(--sp)}
h3{font-weight:700}
p{max-width:64ch}
a{color:var(--blue);text-decoration-thickness:2px;text-underline-offset:3px}
a:hover{color:var(--blue-deep)}
a:focus-visible{outline:3px solid var(--stamp);outline-offset:2px}
.btn{display:inline-block;background:var(--blue);color:var(--paper);padding:12px 32px;text-decoration:none;font-weight:700;border:2px solid var(--blue-deep)}
.btn:hover{background:var(--blue-deep);color:#fff}
.btn:focus-visible{outline:3px solid var(--stamp);outline-offset:2px}
.kicker{font-size:var(--fs-small);letter-spacing:.35em;color:var(--stamp);text-transform:uppercase;margin-bottom:16px;font-weight:700}
.site-header{background:var(--ink);color:var(--paper);border-bottom:4px solid var(--blue)}
.header-inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:16px;padding-top:16px;padding-bottom:16px}
nav ul{list-style:none;display:flex;flex-wrap:wrap;gap:8px 24px}
nav a{color:var(--paper);text-decoration:none;font-weight:700;padding:4px 0;border-bottom:2px solid transparent}
nav a:hover{border-bottom-color:var(--stamp)}
nav a[aria-current="page"]{border-bottom-color:var(--stamp)}
nav a:focus-visible{outline:3px solid var(--stamp);outline-offset:2px}
.breadcrumb{font-size:12px;letter-spacing:.12em;color:var(--muted);padding:16px var(--sp);max-width:1280px;margin:0 auto}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{margin:0 8px}
main{padding-bottom:64px}
section{padding:48px 0}
.hero{border-bottom:2px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:32px;align-items:center}
.hero-img{width:100%;height:auto;border:2px solid var(--line);display:block}
.lead{font-size:var(--fs-lead);margin:16px 0 24px}
.cap-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.cap{border-top:4px solid var(--ink);padding-top:16px}
.cap h3{margin-bottom:8px}
.items{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.item img{width:100%;height:auto;aspect-ratio:4/3;object-fit:cover;display:block;border:2px solid var(--line);filter:grayscale(20%)}
.item h2,.item h3{font-size:1.1rem;margin:12px 0 4px;border:none;padding:0}
.item p{font-size:var(--fs-small);color:var(--muted)}
.item ul{font-size:var(--fs-small);margin-top:8px;padding-left:18px;color:var(--ink)}
.steps{list-style:none;counter-reset:s}
.steps li{counter-increment:s;border:2px solid var(--line);padding:var(--sp);margin-bottom:16px;background:#fff}
.steps li::before{content:counter(s,decimal-leading-zero);font-size:2rem;font-weight:800;color:var(--blue);display:block;line-height:1}
.steps-vertical li{max-width:760px}
.steps li h3{margin-bottom:8px}
dl dt{font-weight:800;margin-top:24px;font-size:1.1rem}
dl dd{margin-top:8px;color:var(--ink)}
dl dd + dt{border-top:1px solid var(--line);padding-top:24px}
.cta{background:var(--ink);color:var(--paper)}
.cta h2{border-left-color:var(--stamp);color:var(--paper);margin-top:0}
.cta p{color:var(--paper)}
.cta a:not(.btn){color:#e8c9a8}
.site-footer{background:var(--ink);color:var(--paper);border-top:4px solid var(--blue);padding:32px 0}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px}
.site-footer a{color:var(--paper)}
.site-footer nav a:hover{color:#e8c9a8}
table{width:100%;border-collapse:collapse;margin:var(--sp) 0;font-size:var(--fs-small)}
caption{text-align:left;font-weight:700;padding-bottom:8px}
th,td{border:1px solid var(--line);padding:12px;text-align:left;vertical-align:top}
th{background:var(--blue);color:var(--paper)}
.guide h2{margin-top:48px}
.guide p{margin-bottom:16px}
.hero-contact .hero-img,.hero-faq{margin-top:var(--sp)}
@media(max-width:900px){
  .hero-grid,.cap-grid{grid-template-columns:minmax(0,1fr)}
  .header-inner{flex-direction:column;align-items:flex-start}
}
@media(max-width:760px){
  .items{grid-template-columns:minmax(0,1fr)}
  :root{--fs-hero:2rem}
}