/*
Theme Name: Usfans US
Theme URI: https://usfans-us.com/
Description: SEO theme for Usfans US - a cross-border shopping-agent spreadsheet, shipping and QC resource. On activation it auto-creates the homepage and all category/guide pages, so the full site is live with no manual content entry.
Version: 1.0.0
Author: Usfans US
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: usfans-us
*/

/* =========================================================
   USFANS US — SEO site stylesheet
   Cross-border shopping agent / proxy buying & forwarding
   Clean, modern, responsive design system
   ========================================================= */

:root{
  --primary:#0f2a4a;
  --primary-2:#16406b;
  --primary-3:#1b6ca8;
  --accent:#ff6a3d;
  --accent-hover:#f2572a;
  --accent-soft:#fff1ec;
  --green:#18b69b;
  --green-hover:#139a83;
  --bg:#f5f7fa;
  --surface:#ffffff;
  --surface-2:#f0f4f9;
  --ink:#14233a;
  --muted:#5b6b82;
  --line:#e4eaf2;
  --radius:16px;
  --radius-sm:10px;
  --shadow-sm:0 1px 3px rgba(15,42,74,.08);
  --shadow:0 10px 30px rgba(15,42,74,.10);
  --shadow-lg:0 20px 50px rgba(15,42,74,.16);
  --maxw:1180px;
  --font:"Segoe UI",system-ui,-apple-system,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:90px}
body{
  font-family:var(--font);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--primary-3);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  font-weight:600;font-size:15px;line-height:1;
  padding:13px 22px;border-radius:999px;border:2px solid transparent;
  cursor:pointer;transition:all .22s ease;white-space:nowrap;
}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-2);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-green{background:var(--green);color:#fff}
.btn-green:hover{background:var(--green-hover);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--line)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.btn-ghost{background:#fff;color:var(--primary);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.btn-lg{padding:16px 30px;font-size:16px}
.btn-sm{padding:9px 16px;font-size:14px}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);backdrop-filter:saturate(160%) blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;gap:18px;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--primary);letter-spacing:.3px}
.logo:hover{color:var(--primary)}
.logo .mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--accent),#ff9a3d);
  display:grid;place-items:center;color:#fff;font-weight:800;font-size:16px;
  box-shadow:var(--shadow-sm);
}
.logo .mark span{transform:translateY(-1px)}
.nav-menu{display:flex;align-items:center;gap:4px;margin-left:8px}
.nav-menu a{
  color:var(--ink);font-weight:600;font-size:15px;padding:10px 12px;border-radius:8px;
}
.nav-menu a:hover{color:var(--accent);background:var(--surface-2)}
.nav-actions{display:flex;align-items:center;gap:10px;margin-left:auto}

/* Dropdown */
.dropdown{position:relative}
.dropdown>button{
  display:flex;align-items:center;gap:6px;background:none;border:none;cursor:pointer;
  font:inherit;color:var(--ink);font-weight:600;font-size:15px;padding:10px 12px;border-radius:8px;
}
.dropdown>button:hover{color:var(--accent);background:var(--surface-2)}
.dropdown>button .caret{font-size:11px;transition:transform .2s}
.dropdown.open>button .caret{transform:rotate(180deg)}
.dropdown-menu{
  position:absolute;top:calc(100% + 8px);left:0;min-width:260px;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  box-shadow:var(--shadow-lg);padding:8px;opacity:0;visibility:hidden;
  transform:translateY(8px);transition:all .2s ease;
}
.dropdown.open .dropdown-menu,.dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown-menu a{
  display:flex;align-items:center;gap:10px;padding:9px 12px;border-radius:9px;
  color:var(--ink);font-weight:500;font-size:14.5px;
}
.dropdown-menu a:hover{background:var(--accent-soft);color:var(--accent)}
.dropdown-menu a .ico{width:22px;text-align:center}

/* Mobile toggle */
.nav-toggle{display:none;background:none;border:none;cursor:pointer;font-size:26px;color:var(--primary);margin-left:auto}

/* ---------- Hero ---------- */
.hero{
  position:relative;color:#fff;overflow:hidden;
  background:
    radial-gradient(900px 400px at 85% -10%,rgba(255,106,61,.35),transparent 60%),
    linear-gradient(135deg,var(--primary) 0%,var(--primary-2) 55%,var(--primary-3) 100%);
}
.hero .container{padding-top:72px;padding-bottom:78px;position:relative;z-index:1}
.hero .eyebrow{
  display:inline-block;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
  padding:7px 16px;border-radius:999px;font-size:13.5px;font-weight:600;letter-spacing:.4px;margin-bottom:20px;
}
.hero h1{font-size:clamp(30px,5vw,50px);line-height:1.12;font-weight:800;max-width:900px;margin-bottom:18px}
.hero h1 .hl{color:#ffd166}
.hero p.lead{font-size:clamp(16px,2vw,19px);color:#dbe6f3;max-width:720px;margin-bottom:30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.hero-stats{display:flex;flex-wrap:wrap;gap:34px;margin-top:40px;padding-top:28px;border-top:1px solid rgba(255,255,255,.16)}
.hero-stats .stat b{display:block;font-size:26px;font-weight:800;color:#fff}
.hero-stats .stat span{font-size:13.5px;color:#b9cbe0}

/* ---------- Sections ---------- */
section{padding:66px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 44px}
.section-head .kicker{color:var(--accent);font-weight:700;font-size:14px;letter-spacing:1.2px;text-transform:uppercase}
.section-head h2{font-size:clamp(25px,3.4vw,36px);font-weight:800;margin:10px 0 12px;color:var(--primary)}
.section-head p{color:var(--muted);font-size:16.5px}
.section-alt{background:var(--surface)}

/* Category grid */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:18px}
.cat-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow-sm);transition:all .25s ease;position:relative;overflow:hidden;
}
.cat-card::after{content:"";position:absolute;inset:0;border-radius:var(--radius);border:2px solid transparent;transition:border-color .25s}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.cat-card:hover::after{border-color:var(--accent)}
.cat-card .emoji{font-size:34px;margin-bottom:14px}
.cat-card h3{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:6px}
.cat-card p{color:var(--muted);font-size:14px;margin-bottom:16px}
.cat-card .go{font-weight:700;font-size:14px;color:var(--accent)}

/* Feature blocks */
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:20px}
.feature{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow-sm)}
.feature .fico{font-size:30px;margin-bottom:12px}
.feature h3{font-size:18px;color:var(--primary);margin-bottom:8px}
.feature p{color:var(--muted);font-size:14.5px}

/* Article cards */
.article-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:22px}
.article-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;
  box-shadow:var(--shadow-sm);transition:all .25s ease;display:flex;flex-direction:column;
}
.article-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.article-card .thumb{height:140px;display:grid;place-items:center;font-size:46px;color:#fff}
.t1{background:linear-gradient(135deg,#ff6a3d,#ff9a3d)}
.t2{background:linear-gradient(135deg,#16406b,#1b6ca8)}
.t3{background:linear-gradient(135deg,#18b69b,#12d1a6)}
.t4{background:linear-gradient(135deg,#7c3aed,#a855f7)}
.t5{background:linear-gradient(135deg,#0f2a4a,#334e68)}
.article-card .body{padding:22px;display:flex;flex-direction:column;flex:1}
.article-card .tag{display:inline-block;align-self:flex-start;background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:12px;padding:4px 11px;border-radius:999px;margin-bottom:12px}
.article-card h3{font-size:18px;color:var(--primary);margin-bottom:10px;line-height:1.35}
.article-card p{color:var(--muted);font-size:14.5px;margin-bottom:16px;flex:1}
.article-card .read{font-weight:700;color:var(--accent);font-size:14px;margin-top:auto}

/* ---------- Page banner (subpages) ---------- */
.page-banner{
  color:#fff;padding:60px 0 54px;
  background:
    radial-gradient(700px 300px at 90% 0%,rgba(255,106,61,.30),transparent 60%),
    linear-gradient(135deg,var(--primary),var(--primary-2));
}
.breadcrumb{font-size:13.5px;color:#aeC4dd;margin-bottom:16px}
.breadcrumb a{color:#dbe6f3}
.breadcrumb a:hover{color:#fff}
.page-banner h1{font-size:clamp(28px,4.5vw,42px);font-weight:800;max-width:860px;margin-bottom:14px}
.page-banner p{color:#dbe6f3;max-width:720px;font-size:17px}
.page-banner .banner-cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- Prose / articles ---------- */
.layout{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start}
.prose h2{font-size:27px;color:var(--primary);margin:38px 0 14px;scroll-margin-top:90px}
.prose h3{font-size:20px;color:var(--primary);margin:26px 0 10px}
.prose p{margin-bottom:16px;color:#2a3a52}
.prose ul,.prose ol{margin:0 0 18px 22px}
.prose li{margin-bottom:8px;color:#2a3a52}
.prose a{font-weight:600;text-decoration:underline;text-underline-offset:2px}
.prose .lead{font-size:18px;color:var(--muted)}
.article-block{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 32px;margin-bottom:26px;box-shadow:var(--shadow-sm);
}
.article-block .meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:6px}
.article-block .meta .tag{background:var(--accent-soft);color:var(--accent);font-weight:700;font-size:12px;padding:4px 11px;border-radius:999px}
.article-block .meta .date{color:var(--muted);font-size:13px}

/* Info / decorative cards inside subpages */
.info-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin:8px 0 10px}
.info-card{background:var(--surface-2);border:1px solid var(--line);border-radius:var(--radius-sm);padding:22px}
.info-card .n{font-size:28px;font-weight:800;color:var(--accent);line-height:1}
.info-card h4{color:var(--primary);margin:10px 0 6px;font-size:16px}
.info-card p{color:var(--muted);font-size:14px;margin:0}

.callout{
  background:linear-gradient(135deg,var(--accent-soft),#fff);
  border:1px solid #ffd9cc;border-left:5px solid var(--accent);
  border-radius:var(--radius-sm);padding:22px 24px;margin:22px 0;
}
.callout h4{color:var(--primary);margin-bottom:6px}
.callout p{margin:0;color:#44546e}

/* Sidebar */
.sidebar .widget{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:22px;box-shadow:var(--shadow-sm)}
.sidebar .widget h4{color:var(--primary);font-size:16px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.sidebar .toc a{display:block;padding:7px 0;font-size:14.5px;color:var(--ink);font-weight:500}
.sidebar .toc a:hover{color:var(--accent)}
.sidebar .linklist a{display:flex;align-items:center;gap:9px;padding:8px 0;font-size:14.5px;color:var(--ink);font-weight:500;border-bottom:1px dashed var(--line)}
.sidebar .linklist a:last-child{border-bottom:none}
.sidebar .linklist a:hover{color:var(--accent)}
.sidebar .cta-widget{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;text-align:center}
.sidebar .cta-widget h4{color:#fff;border-color:rgba(255,255,255,.2)}
.sidebar .cta-widget p{color:#cdddf0;font-size:14px;margin-bottom:16px}
.sidebar .cta-widget .btn{width:100%;justify-content:center;margin-bottom:10px}

/* Related / internal link strip */
.related{background:var(--surface);border-top:1px solid var(--line)}
.related .tag-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center}
.related .tag-cloud a{
  background:var(--surface-2);border:1px solid var(--line);padding:8px 16px;border-radius:999px;
  font-size:14px;font-weight:600;color:var(--primary);
}
.related .tag-cloud a:hover{background:var(--accent);color:#fff;border-color:var(--accent)}

/* CTA band */
.cta-band{
  background:
    radial-gradient(600px 300px at 15% 120%,rgba(255,106,61,.32),transparent 60%),
    linear-gradient(135deg,var(--primary-2),var(--primary));
  color:#fff;text-align:center;border-radius:var(--radius);padding:50px 24px;
}
.cta-band h2{font-size:clamp(24px,3.4vw,34px);margin-bottom:12px}
.cta-band p{color:#dbe6f3;max-width:620px;margin:0 auto 26px;font-size:17px}
.cta-band .hero-cta{justify-content:center}

/* ---------- Footer ---------- */
.site-footer{background:var(--primary);color:#cdddf0;padding:56px 0 26px;margin-top:10px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:34px}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.site-footer .f-about p{font-size:14.5px;margin-bottom:18px;color:#aec4dd}
.site-footer ul{list-style:none}
.site-footer li{margin-bottom:10px}
.site-footer a{color:#cdddf0;font-size:14.5px}
.site-footer a:hover{color:var(--accent)}
.site-footer .f-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff;margin-bottom:14px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:22px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;font-size:13.5px;color:#9db4d0}
.footer-bottom .disclaimer{max-width:760px}

/* ---------- Responsive ---------- */
@media(max-width:960px){
  .layout{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:820px){
  .nav-toggle{display:block}
  .nav-menu,.nav-actions{
    position:fixed;top:72px;left:0;right:0;flex-direction:column;align-items:stretch;
    background:#fff;border-bottom:1px solid var(--line);padding:14px 20px;gap:4px;
    transform:translateY(-120%);transition:transform .3s ease;box-shadow:var(--shadow);
  }
  .nav-actions{top:auto;box-shadow:none;border-bottom:none;padding-top:0}
  .nav.open .nav-menu,.nav.open .nav-actions{transform:translateY(0);position:static}
  .nav.open .nav-menu{margin-top:8px}
  .nav:not(.open) .nav-menu,.nav:not(.open) .nav-actions{display:none}
  .nav-actions{margin-left:0}
  .nav-actions .btn{width:100%;justify-content:center}
  .dropdown-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;padding:0 0 0 12px;min-width:auto}
  .dropdown>button{width:100%;justify-content:space-between}
}
@media(max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  section{padding:48px 0}
  .hero .container{padding-top:54px;padding-bottom:56px}
}