/* Overseas CMS - Frontend Styles */
:root{
  --c-bg:#ffffff; --c-text:#1a1a2e; --c-muted:#6b7280; --c-line:#e8e8ef;
  --c-primary:#2d6cdf; --c-primary-d:#1f52b3; --c-accent:#ff6b4a;
  --c-dark:#13151f; --radius:14px; --shadow:0 8px 30px rgba(20,30,60,.08);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Poppins',-apple-system,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--c-text);background:var(--c-bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:.2s}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--c-line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.logo{font-weight:700;font-size:22px;letter-spacing:-.5px;color:var(--c-dark)}
.logo img{height:40px;width:auto}
.main-nav{display:flex;gap:28px;margin-left:auto}
.main-nav a{font-weight:500;font-size:15px;color:var(--c-text);position:relative;padding:4px 0}
.main-nav a::after{content:'';position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--c-primary);transition:.25s}
.main-nav a:hover{color:var(--c-primary)}
.main-nav a:hover::after{width:100%}
.header-right{display:flex;align-items:center;gap:16px}
.lang-switch{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--c-muted)}
.lang-switch a{padding:2px 6px;border-radius:6px;font-weight:600}
.lang-switch a.active{background:var(--c-primary);color:#fff}
.nav-toggle{display:none;background:none;border:none;font-size:24px;cursor:pointer;color:var(--c-dark)}

/* Hero / Banner */
.hero{position:relative;overflow:hidden}
.hero-slide{position:relative;height:clamp(320px,46vw,520px);display:none}
.hero-slide.active{display:block;animation:fade .8s ease}
.hero-slide img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,15,35,.65),rgba(10,15,35,.15));display:flex;align-items:center}
.hero-text{max-width:var(--maxw);margin:0 auto;padding:0 24px;width:100%;color:#fff}
.hero-text h2{font-size:clamp(28px,4vw,48px);font-weight:700;line-height:1.15;max-width:640px;text-shadow:0 2px 16px rgba(0,0,0,.3)}
.hero-text p{font-size:clamp(15px,1.6vw,20px);margin-top:14px;max-width:520px;opacity:.95}
.hero-btn{display:inline-block;margin-top:22px;background:var(--c-accent);color:#fff;padding:12px 30px;border-radius:50px;font-weight:600;box-shadow:0 6px 20px rgba(255,107,74,.4)}
.hero-btn:hover{transform:translateY(-2px)}
.hero-dots{position:absolute;bottom:20px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:.2s}
.hero-dots span.active{background:#fff;width:28px;border-radius:6px}
@keyframes fade{from{opacity:.3}to{opacity:1}}

/* Sections */
.section{padding:64px 0}
.section-head{text-align:center;margin-bottom:42px}
.section-head h2{font-size:clamp(26px,3vw,38px);font-weight:700;letter-spacing:-.5px}
.section-head p{color:var(--c-muted);margin-top:8px}
.section-alt{background:#f7f8fc}

/* Card grid */
.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.28s;border:1px solid var(--c-line)}
.card:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(20,30,60,.14)}
.card-img{aspect-ratio:16/10;overflow:hidden;background:#eef1f7}
.card-img img{width:100%;height:100%;object-fit:cover;transition:.4s}
.card:hover .card-img img{transform:scale(1.06)}
.card-body{padding:18px 20px 22px}
.card-tag{display:inline-block;font-size:12px;font-weight:600;color:var(--c-primary);background:#eaf1ff;padding:3px 10px;border-radius:20px;margin-bottom:10px}
.card-body h3{font-size:18px;font-weight:600;line-height:1.4;margin-bottom:8px}
.card:hover h3{color:var(--c-primary)}
.card-body p{font-size:14px;color:var(--c-muted)}
.card-meta{font-size:12px;color:#9aa1ad;margin-top:12px}

/* Video card */
.video-card .card-img{position:relative}
.video-card .play{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}
.video-card .play::after{content:'';width:56px;height:56px;border-radius:50%;background:rgba(255,255,255,.92);box-shadow:0 4px 16px rgba(0,0,0,.25)}
.video-card .play::before{content:'';position:absolute;z-index:2;border-style:solid;border-width:11px 0 11px 18px;border-color:transparent transparent transparent var(--c-primary)}

/* Gallery */
.gallery-grid{columns:4;column-gap:18px}
.gallery-grid figure{break-inside:avoid;margin-bottom:18px;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);position:relative}
.gallery-grid img{width:100%;transition:.4s}
.gallery-grid figure:hover img{transform:scale(1.05)}
.gallery-grid figcaption{position:absolute;left:0;right:0;bottom:0;padding:14px 16px;color:#fff;font-size:14px;font-weight:500;background:linear-gradient(transparent,rgba(0,0,0,.7));opacity:0;transition:.3s}
.gallery-grid figure:hover figcaption{opacity:1}

/* Article detail */
.article-hero{max-width:860px;margin:0 auto;padding:48px 24px 0;text-align:center}
.article-hero h1{font-size:clamp(28px,4vw,44px);font-weight:700;line-height:1.2}
.article-hero .meta{color:var(--c-muted);margin-top:14px;font-size:14px}
.article-cover{max-width:960px;margin:32px auto;padding:0 24px}
.article-cover img{width:100%;border-radius:var(--radius)}
.article-content{max-width:760px;margin:0 auto;padding:0 24px 60px;font-size:17px;line-height:1.85}
.article-content p{margin:18px 0}
.article-content img{border-radius:10px;margin:24px auto}
.article-content h2,.article-content h3{margin:32px 0 14px;font-weight:700}
.article-content a{color:var(--c-primary);text-decoration:underline}

/* Page header band */
.page-band{background:linear-gradient(120deg,var(--c-dark),#26304d);color:#fff;padding:60px 0;text-align:center}
.page-band h1{font-size:clamp(28px,4vw,42px);font-weight:700}
.page-band p{opacity:.8;margin-top:10px}

/* Pager */
.pager{display:flex;justify-content:center;gap:8px;margin-top:46px}
.pager a{min-width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:10px;border:1px solid var(--c-line);font-weight:600;color:var(--c-text)}
.pager a:hover{border-color:var(--c-primary);color:var(--c-primary)}
.pager a.active{background:var(--c-primary);color:#fff;border-color:var(--c-primary)}

/* Contact */
.contact-wrap{max-width:680px;margin:0 auto;padding:54px 24px}
.contact-card{background:#fff;border:1px solid var(--c-line);border-radius:var(--radius);box-shadow:var(--shadow);padding:36px}
.contact-card .row{margin-bottom:18px}
.contact-card label{display:block;font-weight:600;margin-bottom:6px;font-size:14px}
.contact-card input,.contact-card textarea{width:100%;padding:12px 14px;border:1px solid var(--c-line);border-radius:10px;font:inherit;font-size:15px}
.contact-card input:focus,.contact-card textarea:focus{outline:none;border-color:var(--c-primary)}
.contact-card button{background:var(--c-primary);color:#fff;border:none;padding:13px 34px;border-radius:10px;font:inherit;font-weight:600;cursor:pointer}
.contact-card button:hover{background:var(--c-primary-d)}
.contact-info{display:flex;flex-wrap:wrap;gap:24px;margin-top:30px;color:var(--c-muted);font-size:14px;justify-content:center}

/* Footer */
.site-footer{background:var(--c-dark);color:#c8cdda;padding:48px 0;margin-top:20px}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:18px;text-align:center}
.footer-nav{display:flex;gap:26px;flex-wrap:wrap;justify-content:center}
.footer-nav a:hover{color:#fff}
.footer-social{display:flex;gap:18px}
.footer-social a{font-size:14px;color:#9aa3b8}
.footer-social a:hover{color:#fff}
.copyright{font-size:13px;color:#7b8398}

.empty{text-align:center;color:var(--c-muted);padding:60px 0;font-size:16px}

/* Responsive */
@media(max-width:920px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .gallery-grid{columns:2}
}
@media(max-width:680px){
  .main-nav{position:fixed;top:70px;right:0;width:240px;height:calc(100vh - 70px);background:#fff;flex-direction:column;gap:0;padding:10px 0;box-shadow:-6px 0 30px rgba(0,0,0,.12);transform:translateX(100%);transition:.3s}
  .main-nav.open{transform:translateX(0)}
  .main-nav a{padding:14px 24px;border-bottom:1px solid var(--c-line)}
  .nav-toggle{display:block}
  .grid-4,.grid-3{grid-template-columns:1fr}
  .gallery-grid{columns:1}
}