/* ============================================================
   前台基础样式 - Default Theme (Modern B2B)
============================================================ */

:root {
    --c-primary: #2563eb;
    --c-primary-dark: #1d4ed8;
    --c-primary-light: #eff6ff;
    --c-accent: #7c3aed;
    --c-text: #0f172a;
    --c-text-muted: #64748b;
    --c-text-light: #94a3b8;
    --c-border: #e5e7eb;
    --c-bg: #ffffff;
    --c-bg-alt: #f8fafc;
    --c-bg-dark: #0f172a;
    --c-success: #10b981;
    
    --container-w: 1480px;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 3px rgba(15,23,42,0.06);
    --shadow: 0 4px 12px rgba(15,23,42,0.08);
    --shadow-lg: 0 12px 32px rgba(15,23,42,0.10);
    
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font);
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.6;
    font-size: 15px;
    -webkit-font-smoothing: antialiased;
}

a { color: var(--c-primary); text-decoration: none; transition: color .2s; }
a:hover { color: var(--c-primary-dark); }

img { max-width: 100%; height: auto; display: block; }

.container {
    max-width: var(--container-w);
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================================
   HEADER
============================================================ */
.site-header {
    position: sticky;
    top: 0;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--c-border);
    z-index: 100;
}
.header-bar {
    display: flex;
    align-items: center;
    height: 72px;
    gap: 32px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 800;
    color: var(--c-text);
}
.brand:hover { color: var(--c-text); }
.brand .logo-icon {
    width: 36px; height: 36px;
    background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(37,99,235,0.3);
}
.main-nav {
    flex: 1;
    display: flex;
    gap: 4px;
    align-items: center;
}
.main-nav a {
    color: var(--c-text-muted);
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 14.5px;
    font-weight: 500;
    transition: all .2s;
}
.main-nav a:hover, .main-nav a.active {
    background: var(--c-primary-light);
    color: var(--c-primary);
}
/* 导航下拉子菜单 */
.nav-item-has-sub { position: relative; display: inline-block; }
.nav-item-has-sub > a { display: inline-flex; align-items: center; gap: 4px; }
.nav-caret { font-size: 10px; transition: transform .2s; opacity: .7; }
.nav-item-has-sub:hover .nav-caret { transform: rotate(180deg); }
.nav-submenu {
    position: absolute; top: 100%; left: 0; min-width: 200px;
    background: #fff; border-radius: 10px; padding: 8px;
    box-shadow: 0 12px 32px rgba(11,31,58,.14); border: 1px solid #eef2f7;
    opacity: 0; visibility: hidden; transform: translateY(8px);
    transition: opacity .22s, transform .22s, visibility .22s; z-index: 200;
}
.nav-item-has-sub:hover .nav-submenu { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-submenu::before { content: ''; position: absolute; top: -8px; left: 0; right: 0; height: 8px; }
.nav-submenu a {
    display: block; padding: 10px 14px; font-size: 14px; color: #0b1f3a;
    border-radius: 6px; font-weight: 500; transition: background .18s, color .18s;
}
.nav-submenu a:hover { background: #fff4ec; color: #ff8c42; }
.nav-dark .nav-submenu a, .nav-transparent .nav-submenu a { color: #0b1f3a !important; }
@media (max-width: 980px) { .nav-submenu { display: none; } }
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}
.lang-switch {
    position: relative;
}
.lang-switch summary {
    list-style: none;
    cursor: pointer;
    padding: 6px 12px;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    font-size: 13px;
    color: var(--c-text-muted);
    text-transform: uppercase;
    background: #fff;
}
.lang-switch summary::-webkit-details-marker { display: none; }
.lang-switch summary:hover { background: var(--c-bg-alt); }
.lang-dropdown {
    position: absolute;
    top: 100%; right: 0;
    margin-top: 6px;
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-width: 140px;
    padding: 6px;
}
.lang-dropdown a {
    display: block;
    padding: 8px 12px;
    color: var(--c-text);
    font-size: 13px;
    border-radius: 4px;
}
.lang-dropdown a:hover { background: var(--c-bg-alt); }
.btn-quote {
    background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
    color: #fff;
    padding: 10px 22px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(37,99,235,0.25);
    transition: all .2s;
}
.btn-quote:hover {
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37,99,235,0.35);
}

/* ============================================================
   SECTIONS / BLOCKS
============================================================ */
.block-section {
    padding: 80px 0;
}
.block-section.no-pad-top { padding-top: 0; }
.block-section.no-pad-bot { padding-bottom: 0; }

.section-title {
    font-size: 36px;
    font-weight: 800;
    text-align: center;
    margin: 0 0 12px;
    color: var(--c-text);
    line-height: 1.2;
}
.section-subtitle {
    text-align: center;
    color: var(--c-text-muted);
    font-size: 16px;
    margin: 0 auto 50px;
    max-width: 700px;
}

/* ----- Hero Banner ----- */
.block-hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    color: #fff;
    padding: 100px 0;
    position: relative;
    overflow: hidden;
}
.block-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 80% 50%, rgba(124,58,237,0.3), transparent 60%),
                radial-gradient(circle at 20% 80%, rgba(37,99,235,0.4), transparent 60%);
}
.hero-inner {
    position: relative;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}
.hero-title {
    font-size: 56px;
    font-weight: 900;
    margin: 0 0 20px;
    line-height: 1.1;
    letter-spacing: -1px;
}
.hero-subtitle {
    font-size: 20px;
    color: rgba(255,255,255,0.85);
    margin: 0 0 36px;
    line-height: 1.5;
}
.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    color: var(--c-primary);
    padding: 16px 38px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(255,255,255,0.2);
    transition: all .2s;
}
.hero-cta:hover {
    color: var(--c-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(255,255,255,0.3);
}

/* ----- Two Column ----- */
.block-two-col {
    background: var(--c-bg-alt);
}
.two-col-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.two-col-text h2 {
    font-size: 32px;
    margin: 0 0 16px;
    color: var(--c-text);
}
.two-col-text p {
    color: var(--c-text-muted);
    font-size: 16px;
    line-height: 1.7;
    margin: 0 0 16px;
}
.two-col-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* ----- Three Features ----- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.feature-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    text-align: center;
    transition: all .3s;
}
.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}
.feature-icon {
    width: 64px; height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--c-primary-light), #f5f3ff);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}
.feature-card h3 {
    font-size: 20px;
    margin: 0 0 12px;
    color: var(--c-text);
}
.feature-card p {
    color: var(--c-text-muted);
    margin: 0;
    line-height: 1.6;
}

/* ----- Text Block ----- */
.block-text-content {
    max-width: 800px;
    margin: 0 auto;
    color: var(--c-text);
    font-size: 16px;
    line-height: 1.7;
}

/* ----- CTA Banner ----- */
.block-cta {
    background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}
.cta-title {
    font-size: 36px;
    font-weight: 800;
    margin: 0 0 14px;
}
.cta-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    margin: 0 0 32px;
}
.cta-button {
    display: inline-block;
    background: #fff;
    color: var(--c-primary);
    padding: 16px 40px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    transition: all .2s;
}
.cta-button:hover {
    color: var(--c-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.2);
}

/* ----- Featured Products ----- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.product-card {
    background: #fff;
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all .3s;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    color: inherit;
    border-color: var(--c-primary-light);
}
.product-cover {
    aspect-ratio: 4 / 3;
    background: var(--c-bg-alt);
    overflow: hidden;
}
.product-cover img {
    width: 100%; height: 100%; object-fit: cover;
    transition: transform .4s;
}
.product-card:hover .product-cover img {
    transform: scale(1.05);
}
.product-card-body {
    padding: 18px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.product-card h3 {
    font-size: 15px;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--c-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-card .summary {
    color: var(--c-text-muted);
    font-size: 13px;
    line-height: 1.5;
    flex: 1;
    margin: 0 0 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.product-card .more {
    color: var(--c-primary);
    font-size: 13px;
    font-weight: 600;
}

/* ----- Latest News ----- */
.news-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.news-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    border: 1px solid var(--c-border);
    transition: all .3s;
}
.news-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    color: inherit;
}
.news-cover {
    aspect-ratio: 16 / 9;
    background: var(--c-bg-alt);
    overflow: hidden;
}
.news-cover img {
    width: 100%; height: 100%; object-fit: cover;
}
.news-card-body { padding: 18px; }
.news-date {
    color: var(--c-text-light);
    font-size: 12px;
    margin-bottom: 6px;
}
.news-card h3 {
    font-size: 16px;
    margin: 0 0 8px;
    line-height: 1.4;
    color: var(--c-text);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card .summary {
    color: var(--c-text-muted);
    font-size: 13px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ----- Inquiry Form ----- */
.inquiry-form {
    max-width: 720px;
    margin: 0 auto;
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 40px;
}
.inquiry-form .form-row {
    margin-bottom: 18px;
}
.inquiry-form label {
    display: block;
    font-size: 13px;
    color: var(--c-text-muted);
    font-weight: 600;
    margin-bottom: 6px;
}
.inquiry-form input, .inquiry-form textarea {
    width: 100%;
    border: 1px solid var(--c-border);
    border-radius: 6px;
    padding: 12px 14px;
    font-size: 14px;
    font-family: inherit;
    transition: all .2s;
}
.inquiry-form input:focus, .inquiry-form textarea:focus {
    outline: none;
    border-color: var(--c-primary);
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}
.inquiry-form textarea { resize: vertical; min-height: 100px; }
.inquiry-form .grid2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.inquiry-submit {
    background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
    color: #fff;
    padding: 14px 36px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(37,99,235,0.25);
    transition: all .2s;
    width: 100%;
}
.inquiry-submit:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(37,99,235,0.35);
}

/* ============================================================
   FOOTER
============================================================ */
.site-footer {
    background: var(--c-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 30px;
    margin-top: 80px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-col h4 {
    color: #fff;
    font-size: 16px;
    margin: 0 0 18px;
    font-weight: 700;
}
.footer-col p, .footer-col li {
    font-size: 13.5px;
    line-height: 1.7;
    color: rgba(255,255,255,0.6);
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col li { margin-bottom: 8px; }
.footer-col a {
    color: rgba(255,255,255,0.7);
    transition: color .2s;
}
.footer-col a:hover { color: #fff; }
.footer-contact-row {
    display: flex;
    gap: 8px;
    margin-bottom: 10px;
    font-size: 13.5px;
}
.footer-contact-row .ic {
    width: 18px;
    color: var(--c-primary);
    flex-shrink: 0;
}
.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    text-align: center;
    font-size: 12.5px;
    color: rgba(255,255,255,0.4);
}

/* ============================================================
   AI CHAT WIDGET
============================================================ */
#ai-chat-launcher {
    position: fixed;
    bottom: 24px; right: 24px;
    width: 60px; height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
    box-shadow: 0 8px 24px rgba(37,99,235,0.4);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 26px;
    z-index: 9998;
    transition: all .2s;
}
#ai-chat-launcher:hover { transform: scale(1.08); }

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 960px) {
    .header-bar { gap: 16px; height: 60px; }
    .main-nav { display: none; }
    .hero-title { font-size: 36px; }
    .hero-subtitle { font-size: 16px; }
    .block-section { padding: 50px 0; }
    .section-title { font-size: 26px; }
    .two-col-grid { grid-template-columns: 1fr; gap: 30px; }
    .features-grid { grid-template-columns: 1fr; }
    .products-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .news-grid { grid-template-columns: 1fr 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
    .inquiry-form { padding: 24px; }
    .inquiry-form .grid2 { grid-template-columns: 1fr; }
}

/* ===================== 导航栏样式（5种，后台可选） ===================== */

/* —— 样式2：居中 Logo（Logo居中，菜单左右分布）—— */
.nav-center .header-bar { position: relative; justify-content: center; }
.nav-center .brand {
    position: absolute; left: 50%; transform: translateX(-50%);
    order: 2;
}
.nav-center .main-nav {
    flex: none; order: 1; justify-content: flex-start;
    position: absolute; left: 0;
}
.nav-center .header-right { order: 3; position: absolute; right: 0; }
@media (max-width: 900px){
    .nav-center .brand { position: static; transform: none; }
    .nav-center .main-nav { position: static; }
}

/* —— 样式3：深色导航（深色背景 + 白字）—— */
.nav-dark.site-header {
    background: #0b1f3a;
    border-bottom: 1px solid rgba(255,255,255,.08);
    backdrop-filter: none;
}
.nav-dark .brand { color: #fff; }
.nav-dark .brand:hover { color: #fff; }
.nav-dark .main-nav a { color: rgba(255,255,255,.78); }
.nav-dark .main-nav a:hover, .nav-dark .main-nav a.active {
    background: rgba(255,255,255,.1); color: #fff;
}
.nav-dark .lang-switch summary { color: rgba(255,255,255,.85); }
.nav-dark .btn-quote {
    background: var(--c-accent, #ff8c42); color: #fff;
}

/* —— 样式4：透明悬浮（透明叠 Hero 上，滚动变白）—— */
.nav-transparent.site-header {
    background: transparent;
    border-bottom: 1px solid rgba(255,255,255,.15);
    backdrop-filter: none;
    transition: all .3s ease;
}
.nav-transparent .brand { color: #fff; }
.nav-transparent .brand:hover { color: #fff; }
.nav-transparent .main-nav a { color: rgba(255,255,255,.85); }
.nav-transparent .main-nav a:hover, .nav-transparent .main-nav a.active {
    background: rgba(255,255,255,.15); color: #fff;
}
.nav-transparent .lang-switch summary { color: #fff; }
.nav-transparent .btn-quote { background: #fff; color: #0b1f3a; }
/* 滚动后变实色（JS 加 .nav-scrolled） */
.nav-transparent.nav-scrolled {
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--c-border);
}
.nav-transparent.nav-scrolled .brand { color: var(--c-text); }
.nav-transparent.nav-scrolled .main-nav a { color: var(--c-text-muted); }
.nav-transparent.nav-scrolled .main-nav a:hover,
.nav-transparent.nav-scrolled .main-nav a.active {
    background: var(--c-primary-light); color: var(--c-primary);
}
.nav-transparent.nav-scrolled .lang-switch summary { color: var(--c-text); }
.nav-transparent.nav-scrolled .btn-quote {
    background: var(--c-primary); color: #fff;
}

/* —— 样式5：简约（大留白 + 细线 + 字母间距）—— */
.nav-minimal.site-header {
    background: #fff;
    border-bottom: 1px solid #f0f0f0;
    backdrop-filter: none;
}
.nav-minimal .header-bar { height: 84px; gap: 48px; }
.nav-minimal .brand { font-weight: 700; letter-spacing: .5px; }
.nav-minimal .brand .logo-icon { background: #0b1f3a; box-shadow: none; }
.nav-minimal .main-nav { gap: 12px; justify-content: center; }
.nav-minimal .main-nav a {
    color: #1a1a1a; font-size: 14px; font-weight: 500;
    letter-spacing: .8px; text-transform: uppercase;
    border-radius: 0; padding: 6px 4px;
    border-bottom: 2px solid transparent;
}
.nav-minimal .main-nav a:hover, .nav-minimal .main-nav a.active {
    background: transparent; color: #0b1f3a;
    border-bottom-color: #0b1f3a;
}
.nav-minimal .btn-quote {
    background: transparent; color: #0b1f3a;
    border: 1px solid #0b1f3a; border-radius: 0;
    text-transform: uppercase; letter-spacing: .8px; font-size: 13px;
}
.nav-minimal .btn-quote:hover { background: #0b1f3a; color: #fff; }

/* ===================== 导航栏 · 欧美高端重设计（覆盖） ===================== */
/* —— 默认精致化 —— */
.site-header { background:#fff; backdrop-filter:none; border-bottom:1px solid #ececec; }
.header-bar { height:80px; gap:40px; }
.brand { font-size:21px; font-weight:700; letter-spacing:-.3px; color:#111; gap:11px; }
.brand:hover { color:#111; }
.brand .logo-icon {
    width:38px; height:38px; border-radius:9px;
    background:#111; box-shadow:none; font-size:18px;
}
.main-nav { flex:1; gap:6px; }
.main-nav a {
    position:relative; color:#444; padding:8px 16px; border-radius:0;
    font-size:15px; font-weight:500; letter-spacing:.1px; background:transparent;
}
.main-nav a::after {
    content:''; position:absolute; left:16px; right:16px; bottom:2px;
    height:2px; background:var(--c-primary,#111); transform:scaleX(0); transform-origin:left;
    transition:transform .25s ease;
}
.main-nav a:hover, .main-nav a.active { background:transparent; color:#111; }
.main-nav a:hover::after, .main-nav a.active::after { transform:scaleX(1); }

.lang-switch summary {
    padding:7px 13px; border:1px solid #e2e2e2; border-radius:7px;
    font-size:13px; color:#555; background:#fff; font-weight:500;
}
.lang-switch summary:hover { background:#fafafa; border-color:#d0d0d0; }

.btn-quote {
    background:var(--c-primary,#111); color:#fff; padding:11px 24px; border-radius:8px;
    font-size:14px; font-weight:600; letter-spacing:.2px; border:none;
    box-shadow:none; transition:all .2s ease;
}
.btn-quote:hover { background:var(--c-primary-dark,#000); transform:translateY(-1px); box-shadow:0 6px 18px rgba(0,0,0,.2); }

/* —— 皮肤2：居中 Logo —— */
.nav-center .brand .logo-icon { background:#111; }

/* —— 皮肤3：深色导航 —— */
.nav-dark.site-header { background:#0f1115; border-bottom:1px solid rgba(255,255,255,.07); }
.nav-dark .brand { color:#fff; }
.nav-dark .brand:hover { color:#fff; }
.nav-dark .brand .logo-icon { background:#fff; color:#0f1115; }
.nav-dark .main-nav a { color:rgba(255,255,255,.72); }
.nav-dark .main-nav a:hover, .nav-dark .main-nav a.active { color:#fff; background:transparent; }
.nav-dark .main-nav a::after { background:#fff; }
.nav-dark .lang-switch summary { background:transparent; border-color:rgba(255,255,255,.2); color:rgba(255,255,255,.85); }
.nav-dark .lang-switch summary:hover { background:rgba(255,255,255,.08); border-color:rgba(255,255,255,.35); }
.nav-dark .lang-dropdown { background:#1a1d23; border-color:rgba(255,255,255,.1); }
.nav-dark .lang-dropdown a { color:rgba(255,255,255,.8); }
.nav-dark .lang-dropdown a:hover { background:rgba(255,255,255,.08); }
.nav-dark .btn-quote { background:#fff; color:#0f1115; }
.nav-dark .btn-quote:hover { background:#f0f0f0; box-shadow:0 6px 18px rgba(0,0,0,.3); }

/* —— 皮肤4：透明悬浮（限定首页；非首页 JS 加 .nav-scrolled 变实色）—— */
.nav-transparent.site-header { background:transparent; border-bottom:1px solid rgba(255,255,255,.18); backdrop-filter:none; transition:all .35s ease; }
.nav-transparent .brand { color:#fff; }
.nav-transparent .brand:hover { color:#fff; }
.nav-transparent .brand .logo-icon { background:rgba(255,255,255,.15); color:#fff; backdrop-filter:blur(4px); }
.nav-transparent .main-nav a { color:rgba(255,255,255,.85); }
.nav-transparent .main-nav a:hover, .nav-transparent .main-nav a.active { color:#fff; background:transparent; }
.nav-transparent .main-nav a::after { background:#fff; }
.nav-transparent .lang-switch summary { background:rgba(255,255,255,.1); border-color:rgba(255,255,255,.25); color:#fff; backdrop-filter:blur(4px); }
.nav-transparent .lang-switch summary:hover { background:rgba(255,255,255,.18); }
.nav-transparent .btn-quote { background:#fff; color:#111; }
.nav-transparent .btn-quote:hover { background:#f0f0f0; }
/* 滚动后 / 非首页：变白底深字 */
.nav-transparent.nav-scrolled { background:rgba(255,255,255,.98); backdrop-filter:blur(10px); border-bottom:1px solid #ececec; }
.nav-transparent.nav-scrolled .brand { color:#111; }
.nav-transparent.nav-scrolled .brand .logo-icon { background:#111; color:#fff; }
.nav-transparent.nav-scrolled .main-nav a { color:#444; }
.nav-transparent.nav-scrolled .main-nav a:hover, .nav-transparent.nav-scrolled .main-nav a.active { color:#111; }
.nav-transparent.nav-scrolled .main-nav a::after { background:#111; }
.nav-transparent.nav-scrolled .lang-switch summary { background:#fff; border-color:#e2e2e2; color:#555; }
.nav-transparent.nav-scrolled .btn-quote { background:#111; color:#fff; }

/* —— 皮肤5：简约 —— */
.nav-minimal.site-header { background:#fff; border-bottom:1px solid #f2f2f2; backdrop-filter:none; }
.nav-minimal .header-bar { height:88px; gap:56px; }
.nav-minimal .brand { font-weight:600; letter-spacing:1px; text-transform:uppercase; font-size:18px; }
.nav-minimal .brand .logo-icon { background:#111; box-shadow:none; }
.nav-minimal .main-nav { gap:0; justify-content:center; }
.nav-minimal .main-nav a {
    color:#222; font-size:13px; font-weight:500; letter-spacing:1.2px;
    text-transform:uppercase; padding:8px 18px; border-radius:0;
}
.nav-minimal .main-nav a::after { left:18px; right:18px; background:#111; }
.nav-minimal .lang-switch summary { border:none; background:transparent; letter-spacing:1px; }
.nav-minimal .btn-quote {
    background:transparent; color:#111; border:1.5px solid #111; border-radius:0;
    text-transform:uppercase; letter-spacing:1px; font-size:12.5px; font-weight:600; padding:11px 24px;
}
.nav-minimal .btn-quote:hover { background:#111; color:#fff; transform:none; box-shadow:none; }

/* ===================== 富文本内容增强（表格/图片/视频自适应）===================== */
/* 作用域：.pd-content（产品）、.article-content（新闻）、.rich-content（装修块） */

/* —— 图片自适应 —— */
.pd-content img, .article-content img, .rich-content img {
    max-width: 100%; height: auto; display: block;
    margin: 22px auto; border-radius: 12px;
}

/* —— 视频/iframe 响应式（16:9）—— */
.rc-video-wrap {
    position: relative; width: 100%; padding-bottom: 56.25%;
    height: 0; overflow: hidden; border-radius: 12px;
    margin: 24px 0; background: #000;
}
.rc-video-wrap iframe, .rc-video-wrap video, .rc-video-wrap embed, .rc-video-wrap object {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%; border: 0;
}
.pd-content video, .article-content video, .rich-content video {
    max-width: 100%; height: auto; display: block; margin: 24px auto; border-radius: 12px;
}

/* —— 表格美化（电脑端）—— */
.rc-table-wrap { margin: 26px 0; }
.pd-content table, .article-content table, .rich-content table {
    width: 100%; border-collapse: separate; border-spacing: 0;
    font-size: 15px; line-height: 1.6; background: #fff;
    border: 1px solid #e6e9f0; border-radius: 12px; overflow: hidden;
    box-shadow: 0 1px 3px rgba(15,23,42,.04);
}
.pd-content table th, .article-content table th, .rich-content table th {
    background: #1e293b; color: #fff;
    font-weight: 600; text-align: left; padding: 14px 18px;
    font-size: 14px; letter-spacing: .2px; border: none; border-right: 1px solid rgba(255,255,255,.08); white-space: nowrap;
}
.pd-content table td, .article-content table td, .rich-content table td {
    padding: 13px 18px; border-top: 1px solid #eef1f6; color: #334155; vertical-align: top;
}
.pd-content table tbody tr:nth-child(even),
.article-content table tbody tr:nth-child(even),
.rich-content table tbody tr:nth-child(even) { background: #f8fafc; }
.pd-content table tbody tr:hover,
.article-content table tbody tr:hover,
.rich-content table tbody tr:hover { background: #f1f5f9; }

/* —— 手机端表格卡片化 —— */
@media (max-width: 768px) {
    .pd-content table, .article-content table, .rich-content table,
    .pd-content table thead, .article-content table thead, .rich-content table thead,
    .pd-content table tbody, .article-content table tbody, .rich-content table tbody,
    .pd-content table tr, .article-content table tr, .rich-content table tr,
    .pd-content table td, .article-content table td, .rich-content table td {
        display: block; width: 100%; box-sizing: border-box;
    }
    /* 隐藏表头行（卡片里用 data-label 显示字段名）*/
    .pd-content table thead, .article-content table thead, .rich-content table thead {
        position: absolute; left: -9999px; top: -9999px;
    }
    .pd-content table, .article-content table, .rich-content table {
        border: none; box-shadow: none; background: transparent;
    }
    .pd-content table tr, .article-content table tr, .rich-content table tr {
        margin-bottom: 16px; border: 1px solid #e6e9f0; border-radius: 12px;
        overflow: hidden; background: #fff; box-shadow: 0 2px 8px rgba(15,23,42,.05);
    }
    .pd-content table tbody tr:nth-child(even),
    .article-content table tbody tr:nth-child(even),
    .rich-content table tbody tr:nth-child(even) { background: #fff; }
    .pd-content table td, .article-content table td, .rich-content table td {
        display: flex; justify-content: space-between; align-items: flex-start;
        gap: 14px; padding: 12px 16px; border-top: 1px solid #f1f5f9; text-align: right;
    }
    .pd-content table tr td:first-child,
    .article-content table tr td:first-child,
    .rich-content table tr td:first-child { border-top: none; }
    /* data-label = 表头文字，显示在左侧 */
    .pd-content table td::before, .article-content table td::before, .rich-content table td::before {
        content: attr(data-label); font-weight: 600; color: #0f1f3d;
        text-align: left; flex-shrink: 0; max-width: 45%;
    }
    .pd-content table td:empty::before,
    .article-content table td:empty::before,
    .rich-content table td:empty::before { content: attr(data-label); }
}

/* —— 无表头表格：横向滚动（不卡片化）—— */
.rc-table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 26px 0; border-radius: 12px; }
.rc-table-scroll table { margin: 0 !important; min-width: 100%; }
@media (max-width: 768px) {
    /* 无表头表格在手机端：保持表格形态 + 横向滚动，不变卡片 */
    .pd-content table.rc-no-head, .article-content table.rc-no-head, .rich-content table.rc-no-head,
    .two-col-text-content table.rc-no-head, .block-text-content table.rc-no-head, .block-render-wrap table.rc-no-head {
        display: table !important; width: auto !important; min-width: 100%;
        border: 1px solid var(--c-border, #e6e9f0) !important; box-shadow: none !important; background: #fff !important;
    }
    .pd-content table.rc-no-head tr, .article-content table.rc-no-head tr, .rich-content table.rc-no-head tr,
    .two-col-text-content table.rc-no-head tr, .block-text-content table.rc-no-head tr, .block-render-wrap table.rc-no-head tr {
        display: table-row !important; margin: 0 !important; border: none !important; border-radius: 0 !important; box-shadow: none !important;
    }
    .pd-content table.rc-no-head td, .article-content table.rc-no-head td, .rich-content table.rc-no-head td,
    .two-col-text-content table.rc-no-head td, .block-text-content table.rc-no-head td, .block-render-wrap table.rc-no-head td {
        display: table-cell !important; width: auto !important; text-align: left !important;
        white-space: nowrap; padding: 12px 16px !important; border-top: 1px solid var(--c-border, #eef1f6) !important;
    }
    .pd-content table.rc-no-head td::before, .article-content table.rc-no-head td::before, .rich-content table.rc-no-head td::before,
    .two-col-text-content table.rc-no-head td::before, .block-text-content table.rc-no-head td::before, .block-render-wrap table.rc-no-head td::before {
        content: none !important;
    }
}

/* —— 无表头表格：横向滚动（不卡片化）—— */
.rc-table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 26px 0; border-radius: 12px; }
.rc-table-scroll table { margin: 0 !important; min-width: 100%; }
@media (max-width: 768px) {
    /* 无表头表格在手机端：保持表格形态 + 横向滚动，不变卡片 */
    .pd-content table.rc-no-head, .article-content table.rc-no-head, .rich-content table.rc-no-head,
    .two-col-text-content table.rc-no-head, .block-text-content table.rc-no-head, .block-render-wrap table.rc-no-head {
        display: table !important; width: auto !important; min-width: 100%;
        border: 1px solid var(--c-border, #e6e9f0) !important; box-shadow: none !important; background: #fff !important;
    }
    .pd-content table.rc-no-head tr, .article-content table.rc-no-head tr, .rich-content table.rc-no-head tr,
    .two-col-text-content table.rc-no-head tr, .block-text-content table.rc-no-head tr, .block-render-wrap table.rc-no-head tr {
        display: table-row !important; margin: 0 !important; border: none !important; border-radius: 0 !important; box-shadow: none !important;
    }
    .pd-content table.rc-no-head td, .article-content table.rc-no-head td, .rich-content table.rc-no-head td,
    .two-col-text-content table.rc-no-head td, .block-text-content table.rc-no-head td, .block-render-wrap table.rc-no-head td {
        display: table-cell !important; width: auto !important; text-align: left !important;
        white-space: nowrap; padding: 12px 16px !important; border-top: 1px solid var(--c-border, #eef1f6) !important;
    }
    .pd-content table.rc-no-head td::before, .article-content table.rc-no-head td::before, .rich-content table.rc-no-head td::before,
    .two-col-text-content table.rc-no-head td::before, .block-text-content table.rc-no-head td::before, .block-render-wrap table.rc-no-head td::before {
        content: none !important;
    }
}

/* Nav brand logo image */
.brand { display: flex; align-items: center; }
.brand .brand-logo {
    height: 44px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
    display: block;
}
/* dark / transparent nav: keep logo visible */
.nav-dark .brand .brand-logo,
.nav-transparent .brand .brand-logo { filter: brightness(1.05); }
.brand .brand-logo-mobile { display: none; }
@media (max-width: 768px) {
    .brand .brand-logo { height: 34px; max-width: 150px; }
    .brand .brand-logo-pc { display: none; }
    .brand .brand-logo-mobile { display: block; }
}