/* ========================================
   Trade (Foreign-trade Independent Station) Theme
   ======================================== */

:root {
    --tc-primary: #1d4ed8;
    --tc-primary-dark: #1e40af;
    --tc-accent: #f59e0b;
    --tc-topbar: #bd96cf;
    --tc-dark: #120b16;
    --tc-ink: #0f172a;
    --tc-muted: #64748b;
    --tc-border: #e2e8f0;
    --tc-bg: #f8fafc;
    --tc-white: #ffffff;
    --tc-radius: 12px;
    --tc-shadow: 0 1px 3px rgba(15, 23, 42, .08), 0 8px 24px rgba(15, 23, 42, .05);
    --tc-max: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    color: var(--tc-ink);
    background: var(--tc-bg);
    line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { margin: 0; font-weight: 700; line-height: 1.25; }
p { margin: 0; }

/* ---------- Header (ref fxtincan.com: purple topbar + white main nav) ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: #fff;
    border-bottom: 1px solid var(--tc-border);
}
/* 顶栏：紫底白字，左联系方式右社交图标 */
.topbar { background: var(--tc-topbar); }
.topbar-inner {
    max-width: var(--tc-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.topbar-contacts { display: flex; align-items: center; gap: 22px; }
.topbar-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #f7f7f7;
    font-size: .88rem;
    white-space: nowrap;
}
.topbar-item:hover { color: #fff; }
.topbar-social { display: flex; align-items: center; gap: 8px; }
.soc {
    width: 24px;
    height: 24px;
    border-radius: 10%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    transition: opacity .15s;
}
.soc:hover { opacity: .85; }
.soc-fb { background: #3b5998; }
.soc-x { background: #000; }
.soc-yt { background: #f00; }
.soc-ig { background: #d62976; }
.soc-in { background: #0077b5; }
.header-inner {
    max-width: var(--tc-max);
    margin: 0 auto;
    padding: 0 24px;
    height: 80px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--tc-primary);
    white-space: nowrap;
}
.brand-mark { display: inline-flex; color: var(--tc-primary); }
.brand-logo { height: 48px; width: auto; display: block; }
.main-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    flex: 1;
    overflow: hidden;
}
.main-nav a {
    padding: 10px 20px;
    font-size: 1.1rem;
    font-weight: 400;
    color: #000;
    white-space: nowrap;
    transition: color .15s;
}
.main-nav a:hover { color: var(--tc-topbar); }
.header-actions { display: flex; align-items: center; gap: 14px; }
.btn-cta {
    background: var(--tc-dark);
    color: #fff;
    font-size: .94rem;
    font-weight: 500;
    padding: 12px 26px;
    border-radius: 4px;
    white-space: nowrap;
    transition: background .15s;
}
.btn-cta:hover { background: var(--tc-topbar); }

/* ---------- Buttons ---------- */
.btn-primary, .btn-outline {
    display: inline-block;
    padding: 12px 26px;
    border-radius: 999px;
    font-weight: 600;
    font-size: .98rem;
    cursor: pointer;
    transition: transform .12s, box-shadow .12s, background .15s;
}
.btn-primary { background: var(--tc-primary); color: #fff; }
.btn-primary:hover { background: var(--tc-primary-dark); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(29, 78, 216, .35); }
.btn-outline { border: 1.5px solid rgba(255, 255, 255, .8); color: #fff; }
.btn-outline:hover { background: rgba(255, 255, 255, .12); }

/* ---------- Main ---------- */
.site-main { min-height: 60vh; }
.section-head { text-align: center; max-width: var(--tc-max); margin: 0 auto; padding: 0 24px; }
.section-title { font-size: 1.9rem; }
.section-desc { color: var(--tc-muted); margin-top: 8px; }

/* ---------- Hero ---------- */
.hero {
    background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 55%, #2563eb 100%);
    color: #fff;
    padding: 96px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 80% 20%, rgba(245, 158, 11, .25), transparent 45%);
    pointer-events: none;
}
.hero-inner { max-width: 820px; margin: 0 auto; position: relative; z-index: 1; }
.hero-eyebrow {
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: .1em;
    font-size: .8rem;
    font-weight: 600;
    color: #bfdbfe;
    margin-bottom: 16px;
}
.hero-title { font-size: 2.8rem; line-height: 1.15; }
.hero-subtitle { margin-top: 18px; font-size: 1.1rem; color: #dbeafe; }
.hero-actions { margin-top: 32px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
    background: linear-gradient(135deg, #1e3a8a, #1d4ed8);
    color: #fff;
    padding: 56px 24px;
}
.page-hero-sm { padding: 40px 24px; }
.page-hero-inner { max-width: var(--tc-max); margin: 0 auto; }
.page-title { font-size: 2rem; margin-top: 6px; }
.page-subtitle { margin-top: 10px; color: #dbeafe; max-width: 720px; }

/* ---------- Breadcrumb ---------- */
.breadcrumb { font-size: .88rem; color: #cbd5e1; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.breadcrumb a { color: #e0e7ff; }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.breadcrumb .sep { color: #94a3b8; }
.breadcrumb .current { color: #fff; }

/* ---------- Categories ---------- */
.categories { max-width: var(--tc-max); margin: 0 auto; padding: 64px 24px 8px; }
.category-grid {
    margin-top: 32px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}
.category-card {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius);
    padding: 24px 18px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    text-align: center;
    font-weight: 600;
    transition: transform .15s, box-shadow .15s, border-color .15s;
}
.category-card:hover { transform: translateY(-3px); box-shadow: var(--tc-shadow); border-color: var(--tc-primary); color: var(--tc-primary); }
.category-icon {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: #eff6ff;
    color: var(--tc-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ---------- Products grid ---------- */
.products { max-width: var(--tc-max); margin: 0 auto; padding: 64px 24px; }
.product-grid {
    margin-top: 32px;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.product-card {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform .15s, box-shadow .15s;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--tc-shadow); }
.product-thumb {
    display: block;
    aspect-ratio: 4 / 3;
    background: #f1f5f9;
    overflow: hidden;
}
.product-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .3s; }
.product-card:hover .product-thumb img { transform: scale(1.05); }
.thumb-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #cbd5e1;
}
.product-body { padding: 18px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.product-title { font-size: 1.05rem; }
.product-title a:hover { color: var(--tc-primary); }
.product-desc {
    color: var(--tc-muted);
    font-size: .9rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-meta {
    margin-top: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: .82rem;
    color: var(--tc-muted);
    padding-top: 8px;
    border-top: 1px solid var(--tc-border);
}
.product-link { color: var(--tc-primary); font-weight: 600; }

/* ---------- Features ---------- */
.features {
    max-width: var(--tc-max);
    margin: 0 auto;
    padding: 24px 24px 72px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.feature-item {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius);
    padding: 32px 28px;
    text-align: center;
}
.feature-icon {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    background: #eff6ff;
    color: var(--tc-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}
.feature-item h3 { font-size: 1.15rem; margin-bottom: 8px; }
.feature-item p { color: var(--tc-muted); font-size: .92rem; }

/* ---------- CTA banner ---------- */
.cta-banner {
    background: linear-gradient(135deg, #f59e0b, #f97316);
    color: #fff;
    text-align: center;
    padding: 64px 24px;
}
.cta-banner h2 { font-size: 1.9rem; }
.cta-banner p { margin: 12px 0 26px; font-size: 1.05rem; opacity: .95; }
.cta-banner .btn-primary { background: #fff; color: #b45309; }
.cta-banner .btn-primary:hover { background: #fff7ed; box-shadow: 0 8px 20px rgba(0, 0, 0, .18); }

/* ---------- Article detail ---------- */
.detail-wrap { max-width: 860px; margin: 0 auto; padding: 48px 24px 72px; }
.detail-meta {
    margin-top: 14px;
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: .88rem;
    color: #dbeafe;
}
.detail-content {
    background: var(--tc-white);
    border: 1px solid var(--tc-border);
    border-radius: var(--tc-radius);
    padding: 36px;
    font-size: 1rem;
    color: #334155;
}
.detail-content img { border-radius: 8px; margin: 16px 0; }
.detail-content p { margin: 0 0 16px; }
.detail-actions {
    margin-top: 28px;
    display: flex;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
}
.detail-actions .btn-outline { border-color: var(--tc-primary); color: var(--tc-primary); }
.detail-actions .btn-outline:hover { background: #eff6ff; }

/* ---------- Search box ---------- */
.search-box {
    margin-top: 18px;
    display: flex;
    gap: 10px;
    max-width: 520px;
}
.search-box input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--tc-border);
    border-radius: 999px;
    font-size: .95rem;
    outline: none;
}
.search-box button {
    border: 0;
    background: var(--tc-accent);
    color: #fff;
    font-weight: 600;
    padding: 12px 24px;
    border-radius: 999px;
    cursor: pointer;
}

/* ---------- Empty state ---------- */
.empty-state {
    text-align: center;
    padding: 64px 24px;
    color: var(--tc-muted);
}
.empty-hint { margin-top: 8px; font-size: .88rem; color: #94a3b8; }

/* ---------- Pagination ---------- */
.pagination {
    margin-top: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
}
.page-btn {
    padding: 9px 20px;
    border: 1px solid var(--tc-border);
    border-radius: 999px;
    background: var(--tc-white);
    font-weight: 600;
    font-size: .9rem;
    transition: background .15s, color .15s, border-color .15s;
}
.page-btn:hover { background: var(--tc-primary); color: #fff; border-color: var(--tc-primary); }
.page-info { color: var(--tc-muted); font-size: .9rem; }

/* ---------- Footer ---------- */
.site-footer { background: #0f172a; color: #cbd5e1; }
.footer-inner {
    max-width: var(--tc-max);
    margin: 0 auto;
    padding: 56px 24px 40px;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
}
.footer-col h4 { color: #fff; font-size: 1.05rem; margin-bottom: 16px; }
.footer-about p { color: #94a3b8; max-width: 420px; }
.footer-links, .footer-contact { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-links a:hover { color: #fff; }
.footer-contact li { display: flex; align-items: center; gap: 10px; color: #94a3b8; }
.footer-bottom {
    border-top: 1px solid #1e293b;
    text-align: center;
    padding: 20px 24px;
    font-size: .85rem;
    color: #64748b;
}

/* ---------- Responsive ---------- */
@media (max-width: 992px) {
    .category-grid { grid-template-columns: repeat(3, 1fr); }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .topbar-inner { height: auto; padding: 6px 16px; flex-wrap: wrap; }
    .topbar-social { display: none; }
    .header-inner { flex-wrap: wrap; height: auto; padding: 12px 16px; gap: 12px; }
    .main-nav { order: 3; width: 100%; justify-content: flex-start; overflow-x: auto; }
    .hero-title { font-size: 2rem; }
    .category-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .features { grid-template-columns: 1fr; }
    .footer-inner { grid-template-columns: 1fr; gap: 28px; }
    .detail-content { padding: 22px; }
}
@media (max-width: 480px) {
    .category-grid { grid-template-columns: 1fr 1fr; }
    .product-grid { grid-template-columns: 1fr; }
}

/* Language switcher: hover dropdown (ref fxtincan.com) */
.lang-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    z-index: 200;
}
.lang-trigger {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 4px;
    font-size: 14px;
    color: var(--tc-ink);
    user-select: none;
    transition: color .2s ease;
}
.lang-switch:hover .lang-trigger {
    color: var(--tc-topbar);
}
.lang-caret {
    transition: transform .25s ease;
}
.lang-switch:hover .lang-caret {
    transform: rotate(180deg);
}
.lang-drop {
    position: absolute;
    top: 100%;
    right: 0;
    padding: 8px;
    min-width: 160px;
    max-height: 50vh;
    overflow-y: auto;
    background: var(--tc-white);
    border-radius: 6px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, .15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all .25s ease;
    z-index: 999;
}
.lang-switch:hover .lang-drop {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.lang-drop::-webkit-scrollbar { width: 4px; }
.lang-drop::-webkit-scrollbar-thumb { background: #d0d0d0; border-radius: 4px; }
.lang-item {
    display: flex;
    align-items: center;
    padding: 10px;
    font-size: 14px;
    line-height: 1.2;
    color: #333;
    white-space: nowrap;
    border-radius: 4px;
    text-decoration: none;
    transition: background .2s;
}
.lang-item:hover {
    background: #f5f5f5;
    color: #000;
}
.lang-item.active {
    color: var(--tc-primary);
    font-weight: 600;
}