/* ============================================
   重庆奥伦科技有限公司 - 全局样式表
   Medical Device Industry Professional Style
   ============================================ */

/* --- CSS Variables --- */
:root {
    --primary: #1a3533;
    --primary-light: #234b48;
    --secondary: #47ACAB;
    --secondary-light: #5ebfbd;
    --accent: #47ACAB;
    --gradient: linear-gradient(135deg, #1a3533 0%, #234b48 50%, #3d9e9d 100%);
    --gradient-light: linear-gradient(135deg, #47ACAB 0%, #5ebfbd 50%, #7ad4d2 100%);
    --white: #ffffff;
    --light-bg: #f7f8fa;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --text: #1a1a2e;
    --text-light: #555;
    --text-muted: #888;
    --border: #e8ecf1;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow: 0 4px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.12);
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 16px;
    --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --header-h: 72px;
    --max-w: 1280px;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: var(--font);
    color: var(--text);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }

/* --- Utility --- */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-sm { padding: 48px 0; }
.section-lg { padding: 120px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--secondary);
    margin-bottom: 12px;
    position: relative;
    padding-left: 32px;
}
.section-tag::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    width: 24px; height: 1.5px;
    background: var(--secondary);
}
.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.3;
}
.section-title-inline {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 16px;
    line-height: 1.3;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}
.section-desc {
    font-size: 15px;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}
.bg-light { background: var(--light-bg); }
.text-center { text-align: center; }

/* --- Buttons --- */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 12px 32px; border-radius: var(--radius-sm);
    font-size: 15px; font-weight: 600;
    cursor: pointer; border: none;
    transition: var(--transition);
    line-height: 1;
    white-space: nowrap;
}
.btn-primary {
    background: var(--gradient-light);
    color: var(--white);
    box-shadow: 0 4px 16px rgba(71,172,171,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(71,172,171,0.45); }
.btn-outline {
    background: transparent;
    color: var(--secondary);
    border: 1.5px solid var(--secondary);
}
.btn-outline:hover { background: var(--secondary); color: var(--white); }
.btn-light {
    background: rgba(255,255,255,0.15);
    color: var(--white);
    border: 1.5px solid rgba(255,255,255,0.3);
    backdrop-filter: blur(10px);
}
.btn-light:hover { background: rgba(255,255,255,0.25); }

/* ==================== HEADER ==================== */
.header {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 1000;
    height: var(--header-h);
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}
.header.scrolled { border-color: var(--border); box-shadow: 0 1px 4px rgba(0,0,0,0.06); }
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    height: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 24px;
}
.logo {
    display: flex; align-items: center;
    max-width: 320px;
}
.logo img {
    height: 64px; width: auto; display: block;
}
.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
    display: block; padding: 8px 18px;
    font-size: 14px; font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}
.nav a:hover, .nav a.active { color: var(--secondary); background: rgba(71,172,171,0.06); }
.nav a.active::after {
    content: '';
    position: absolute;
    bottom: -4px; left: 50%; transform: translateX(-50%);
    width: 20px; height: 2px;
    background: var(--secondary);
    border-radius: 2px;
}
.header-actions { display: flex; align-items: center; gap: 12px; }
/* --- Language Dropdown --- */
.lang-dropdown {
    position: relative;
    z-index: 100;
}
.lang-dropdown-toggle {
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 13px; color: var(--gray-600); cursor: pointer;
    padding: 8px 14px; border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    background: var(--white);
    transition: var(--transition);
    white-space: nowrap;
    font-weight: 500;
}
.lang-dropdown-toggle:hover,
.lang-dropdown.open .lang-dropdown-toggle {
    border-color: var(--secondary); color: var(--secondary);
}
.lang-dropdown-toggle .arrow {
    font-size: 10px;
    transition: transform 0.25s ease;
}
.lang-dropdown.open .lang-dropdown-toggle .arrow {
    transform: rotate(180deg);
}
.lang-dropdown-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 150px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}
.lang-dropdown.open .lang-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.lang-dropdown-menu a {
    display: flex; align-items: center; gap: 10px;
    padding: 10px 16px;
    font-size: 13px;
    color: var(--gray-700);
    transition: var(--transition);
    cursor: pointer;
}
.lang-dropdown-menu a:hover,
.lang-dropdown-menu a.active {
    background: rgba(71,172,171,0.12);
    color: var(--secondary);
}
.lang-dropdown-menu a.active {
    font-weight: 600;
}
/* 未接受 Cookie（拒绝或未选择）时锁定语言切换 */
.lang-dropdown.lang-locked .lang-dropdown-toggle,
.lang-dropdown.lang-locked .lang-dropdown-toggle:hover {
    opacity: .55;
    cursor: not-allowed;
    border-color: var(--border);
    color: var(--gray-400);
    background: transparent;
}
.lang-dropdown.lang-locked .lang-dropdown-menu { display: none; }

/* ==================== NAV DROPDOWN ==================== */
.nav-dropdown {
    position: relative;
}

.nav-dropdown > a .arrow {
    font-size: 10px;
    margin-left: 4px;
    display: inline-block;
    transition: transform 0.2s;
}

.nav-dropdown:hover > a .arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--white);
    border-radius: var(--radius-sm);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
    min-width: 160px;
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1001;
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.nav-dropdown-menu a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text);
    white-space: nowrap;
    transition: all 0.15s;
    text-decoration: none;
}

.nav-dropdown-menu a:hover {
    background: var(--gray-50);
    color: var(--secondary);
}

.nav-dropdown-menu a.active {
    color: var(--secondary);
    font-weight: 600;
}
.lang-dropdown-menu a .lang-code {
    font-size: 10px;
    color: var(--text-muted);
    margin-left: auto;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.lang-dropdown-menu a.active .lang-code {
    color: var(--secondary);
    font-weight: 600;
}
.menu-toggle {
    display: none; flex-direction: column; gap: 5px;
    width: 32px; cursor: pointer;
    background: none; border: none; padding: 6px;
    z-index: 1010;
}
.menu-toggle span { display: none; }
.menu-toggle img {
    width: 100%; height: 100%;
    object-fit: contain;
    transition: var(--transition);
}
.menu-toggle.active img {
    transform: rotate(90deg);
}

/* --- Mobile Nav --- */
.mobile-nav {
    display: none;
    position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: var(--white);
    z-index: 999;
    padding: 24px;
    flex-direction: column;
    gap: 4px;
    overflow-y: auto;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
    display: block; padding: 14px 20px;
    font-size: 16px; font-weight: 500;
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    transition: var(--transition);
}
.mobile-nav a:hover, .mobile-nav a.active {
    color: var(--secondary);
    background: rgba(71,172,171,0.06);
}
.mobile-nav .mobile-sub {
    padding-left: 36px;
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 400;
}
.mobile-nav .mobile-sub:hover {
    color: var(--secondary);
    background: rgba(71,172,171,0.06);
}

/* ==================== HERO CAROUSEL ==================== */
.hero-carousel {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    overflow: hidden;
    background: var(--gradient);
}
.hero-slides {
    position: relative;
    width: 100%;
    height: 100%;
    z-index: 2;
}
.hero-slide {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    display: flex; align-items: center;
    opacity: 0;
    transition: opacity 0.6s ease;
    z-index: 1;
}
.hero-slide.active { opacity: 1; z-index: 2; }
.hero-slide-bg {
    position: absolute; top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    object-position: center;
    pointer-events: none;
}
.hero-overlay {
    position: absolute; top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0.04) 45%, rgba(0,0,0,0.08) 100%);
    z-index: 1;
    pointer-events: none;
}
.hero-slide-overlay { display: none; }
.hero-slide-content {
    position: relative; z-index: 2;
    width: 100%;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 120px 24px 80px;
    color: var(--primary);
}
.hero-title {
    font-size: 48px; font-weight: 700; line-height: 1.2; margin-bottom: 20px;
    color: var(--accent);
}
.hero-title span { color: var(--primary); }
.hero-subtitle {
    font-size: 17px; color: rgba(26,53,51,0.78); line-height: 1.8; margin-bottom: 36px;
    max-width: 560px;
}

/* Dots */
.hero-arrow {
    position: absolute; top: 50%; z-index: 5;
    width: 48px; height: 48px;
    border-radius: 50%;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    color: var(--white);
    font-size: 20px;
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    transform: translateY(-50%);
}
.hero-arrow:hover {
    background: rgba(255,255,255,0.25);
    border-color: rgba(255,255,255,0.4);
}
.hero-arrow-left { left: 24px; }
.hero-arrow-right { right: 24px; }

/* Dots */
.hero-dots {
    position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%);
    z-index: 5;
    display: flex; gap: 10px;
}
.hero-dots span {
    width: 12px; height: 12px;
    border-radius: 50%;
    background: rgba(255,255,255,0.35);
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}
.hero-dots span:hover { background: rgba(255,255,255,0.6); }
.hero-dots span.active {
    background: var(--accent);
    border-color: var(--white);
    transform: scale(1.2);
}

/* ==================== FEATURES ==================== */
.features-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.feature-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px 28px;
    text-align: center;
    transition: var(--transition);
    border: 1px solid var(--border);
}
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature-icon {
    width: 64px; height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(71,172,171,0.08) 0%, rgba(122,212,210,0.06) 100%);
    border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 28px;
    color: var(--secondary);
}
.feature-card h4 { font-size: 17px; margin-bottom: 10px; color: var(--primary); }
.feature-card p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ==================== ABOUT PREVIEW ==================== */
.about-preview-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.about-preview-image {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 380px;
}
.about-preview-img {
    width: 100%; height: 100%;
    object-fit: cover;
    position: absolute; top: 0; left: 0;
}
.about-preview-text h3 { font-size: 28px; color: var(--primary); margin-bottom: 16px; }
.about-preview-text p { font-size: 15px; color: var(--text-light); line-height: 1.9; margin-bottom: 12px; }
.about-preview-text .check-list { margin: 24px 0; }
.about-preview-text .check-list li {
    padding: 6px 0; font-size: 14px; color: var(--text-light);
    display: flex; align-items: center; gap: 10px;
}
.about-preview-text .check-list li::before {
    content: '✓';
    display: inline-flex; align-items: center; justify-content: center;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
    color: #2e7d32;
    font-size: 12px; font-weight: 700;
    flex-shrink: 0;
}

/* ==================== LEADERSHIP SPEECH ==================== */
.leadership-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.leadership-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--gray-100);
}
.leadership-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.leadership-text {
    padding: 20px 0;
}
.leadership-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
}
.leadership-subtitle {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 20px;
}
.leadership-divider {
    width: 40px;
    height: 3px;
    background: var(--secondary);
    margin-bottom: 24px;
}
.leadership-text p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 2.2;
    margin-bottom: 8px;
}

/* ==================== PRODUCTS PREVIEW ==================== */
.products-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.product-card-image {
    height: 220px;
    background: #f8fafc;
    display: flex; align-items: center; justify-content: center;
    position: relative;
    overflow: hidden;
}
.product-card-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 12px;
    transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.product-card:hover .product-card-image img {
    transform: scale(1.18);
}
.product-card-badge {
    position: absolute; top: 16px; left: 16px;
    background: var(--gradient-light);
    color: var(--white);
    font-size: 11px; font-weight: 600;
    padding: 4px 12px; border-radius: 50px;
    z-index: 1;
}
.product-card-body { padding: 24px; }
.product-card-body h4 { font-size: 18px; color: var(--primary); margin-bottom: 8px; }
.product-card-body p { font-size: 13px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.product-card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 16px; }
.product-card-tags span {
    font-size: 11px; padding: 4px 10px;
    background: var(--gray-100);
    border-radius: 50px;
    color: var(--gray-600);
}
.product-card-footer {
    display: flex; align-items: center; justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}
.product-card-footer .model { font-size: 12px; color: var(--text-muted); font-family: monospace; }
.product-card-footer .arrow {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--gray-100);
    display: flex; align-items: center; justify-content: center;
    color: var(--secondary);
    transition: var(--transition);
}
.product-card:hover .arrow { background: var(--secondary); color: var(--white); }

/* ==================== CTA BANNER ==================== */
.cta-banner {
    background: var(--gradient);
    padding: 72px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-banner::before {
    content: '';
    position: absolute; inset: 0;
    background: radial-gradient(circle at 30% 50%, rgba(122,212,210,0.12) 0%, transparent 50%);
}
.cta-banner .container { position: relative; z-index: 1; }
.cta-banner h2 { font-size: 34px; color: var(--white); margin-bottom: 16px; }
.cta-banner p { color: rgba(255,255,255,0.7); max-width: 500px; margin: 0 auto 28px; }

/* ==================== NEWS PREVIEW ==================== */
.news-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.news-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    text-decoration: none; color: inherit; display: block;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.news-card-image {
    height: 180px; overflow: hidden;
    background: linear-gradient(135deg, #e8eaf6 0%, #e3f2fd 100%);
}
.news-card-image img {
    width: 100%; height: 100%; object-fit: cover; display: block;
    transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.news-card:hover .news-card-image img {
    transform: scale(1.18);
}
.news-card-body { padding: 20px; }
.news-card-date { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.news-card-body h4 {
    font-size: 16px; color: var(--primary); margin-bottom: 8px;
    line-height: 1.5;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card-body p {
    font-size: 13px; color: var(--text-muted); line-height: 1.6;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card-more {
    display: inline-flex; align-items: center; gap: 4px;
    font-size: 13px; font-weight: 600; color: var(--secondary);
    margin-top: 12px;
    transition: var(--transition);
}
.news-card-more:hover { gap: 8px; }

/* ==================== PARTNERS ==================== */
.partners-grid {
    display: grid; grid-template-columns: repeat(6, 1fr); gap: 32px;
    align-items: center;
}
.partner-item {
    background: var(--white);
    border-radius: var(--radius-sm);
    padding: 24px;
    text-align: center;
    border: 1px solid var(--border);
    transition: var(--transition);
    filter: grayscale(100%);
    opacity: 0.6;
}
.partner-item:hover { filter: grayscale(0); opacity: 1; box-shadow: var(--shadow-sm); }
.partner-item .partner-placeholder {
    height: 40px;
    background: var(--gray-200);
    border-radius: 4px;
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--primary);
    color: rgba(255,255,255,0.75);
    padding: 64px 0 0;
}
.footer-grid {
    display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;     gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand .logo { margin-bottom: 16px; max-width: 260px; }
.footer-brand .logo img { height: 48px; width: auto; display: block; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin-bottom: 20px; }
.footer-col h4 {
    font-size: 16px; color: #fff;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 12px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 24px; height: 2px;
    background: var(--secondary);
    border-radius: 2px;
}
.footer-col a {
    display: block; padding: 6px 0;
    font-size: 14px; color: rgba(255,255,255,0.65);
    transition: var(--transition);
}
.footer-col a:hover { color: #fff; padding-left: 6px; }
.footer-bottom {
    padding: 24px 0;
    display: flex; align-items: center; justify-content: space-between;
    font-size: 13px; color: rgba(255,255,255,0.5);
    flex-wrap: wrap; gap: 12px;
}
.footer-bottom-links { display: flex; gap: 24px; }
.footer-bottom-links a { color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-bottom-links a:hover { color: var(--secondary); }

/* ==================== PAGE HERO (Inner Pages) ==================== */
.page-hero {
    padding: 160px 0 100px;
    background: var(--gradient);
    text-align: center;
    position: relative;
}
.page-hero::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(26,53,51,0.85) 0%, rgba(71,172,171,0.75) 100%);
    z-index: 0;
}
.page-hero::after {
    content: '';
    position: absolute; bottom: 0; left: 0; right: 0;
    height: 40px;
    background: var(--white);
    border-radius: 40px 40px 0 0;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero-bg {
    background: url('../images/product-bg.jpg') center/cover no-repeat !important;
}
.about-hero {
    background: url('../images/about-bg.png') center/cover no-repeat !important;
}
.news-hero {
    background: url('https://images.unsplash.com/photo-1495020689067-958852a7765e?w=1920&h=400&fit=crop') center/cover no-repeat !important;
}
.support-hero {
    background: url('https://images.unsplash.com/photo-1531482615713-2afd69097998?w=1920&h=400&fit=crop') center/cover no-repeat !important;
}
.contact-hero {
    background: url('https://images.unsplash.com/photo-1423666639041-f56000c27a9a?w=1920&h=400&fit=crop') center/cover no-repeat !important;
}
.page-hero h1 { font-size: 40px; color: var(--white); margin-bottom: 12px; }
.page-hero .breadcrumb {
    display: flex; align-items: center; justify-content: center; gap: 8px;
    font-size: 14px; color: rgba(255,255,255,0.6);
}
.page-hero .breadcrumb a { color: rgba(255,255,255,0.8); }
.page-hero .breadcrumb a:hover { color: var(--white); }

/* ==================== ABOUT PAGE ==================== */
.timeline { position: relative; padding-left: 40px; }
.timeline::before {
    content: '';
    position: absolute; left: 16px; top: 0; bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--secondary), var(--border));
}
.timeline-item { position: relative; padding-bottom: 40px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
    content: '';
    position: absolute; left: -32px; top: 6px;
    width: 12px; height: 12px;
    background: var(--secondary);
    border-radius: 50%;
    border: 2px solid var(--white);
    box-shadow: 0 0 0 3px rgba(71,172,171,0.2);
}
.timeline-year { font-size: 13px; font-weight: 700; color: var(--secondary); margin-bottom: 4px; }
.timeline-title { font-size: 18px; font-weight: 600; color: var(--primary); margin-bottom: 6px; }
.timeline-desc { font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ==================== CERT SECTION ==================== */
.cert-section {
    background: linear-gradient(180deg, #F8FAFC 0%, #F1F5F9 50%, #F8FAFC 100%);
    position: relative;
    overflow: hidden;
}
.cert-section::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(71,172,171,0.08), transparent);
}
.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
    max-width: 1100px;
    margin: 0 auto;
}
/* 资质荣誉 - 分页（每页 6 条） */
.cert-pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 40px;
}
.cert-pagination .page-num,
.cert-pagination .page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--border);
    border-radius: 2px;
    background: #fff;
    color: var(--text-light);
    font-size: 14px;
    text-decoration: none;
    transition: var(--transition);
}
.cert-pagination .page-num:hover,
.cert-pagination .page-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}
.cert-pagination .page-num.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    font-weight: 600;
}
.cert-empty {
    text-align: center;
    color: var(--text-muted);
    font-size: 15px;
    padding: 40px 0 0;
}
.cert-card {
    background: #fff;
    border-radius: 2px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94), box-shadow 0.4s ease;
    display: flex;
    flex-direction: column;
}
.cert-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.08), 0 2px 8px rgba(0,0,0,0.04);
}
.cert-card-accent {
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
    flex-shrink: 0;
}
.cert-frame {
    position: relative;
    background: #fff;
}
.cert-frame::after {
    content: '';
    position: absolute;
    inset: 12px;
    border: 1px solid rgba(0,0,0,0.06);
    pointer-events: none;
}
.cert-frame img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    position: relative;
    z-index: 1;
    background: #fafbfc;
    border: 1px solid #e8ecf1;
    padding: 8px;
    cursor: default;
}
.cert-body {
    padding: 18px 24px 24px;
    text-align: center;
}
.cert-name {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
    letter-spacing: 0.03em;
}

/* ==================== PRODUCTS PAGE ==================== */
.products-grid-full { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }

/* ==================== PRODUCTS SHOWCASE (产品展示区) ==================== */
.products-showcase {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}
.product-showcase-card {
    display: flex;
    flex-direction: column;
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid #eef1f6;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}
.product-showcase-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 56px rgba(0,10,40,0.09);
    border-color: transparent;
}
.psc-image {
    position: relative;
    height: 360px;
    background: linear-gradient(160deg, #f8fafd 0%, #eef2f8 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.psc-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.product-showcase-card:hover .psc-image img {
    transform: scale(1.1);
}
.psc-badge {
    position: absolute;
    top: 18px;
    left: 18px;
    background: var(--accent);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 5px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.5px;
    z-index: 1;
}
.psc-body {
    padding: 28px 30px 32px;
    display: flex;
    flex-direction: column;
    flex: 1;
}
.psc-series {
    font-size: 12px;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 10px;
}
.psc-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 4px;
    line-height: 1.15;
}
.psc-subtitle {
    font-size: 17px;
    color: #4a5568;
    margin-bottom: 18px;
    line-height: 1.4;
    font-weight: 500;
}
.psc-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}
.psc-tags span {
    display: inline-block;
    padding: 5px 14px;
    background: #f0f4ff;
    color: #3b6ed8;
    border-radius: 5px;
    font-size: 13px;
    font-weight: 500;
}
.psc-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 22px;
    flex: 1;
}
.psc-action {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    padding-bottom: 2px;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
    width: fit-content;
}
.product-showcase-card:hover .psc-action {
    border-bottom-color: var(--accent);
    gap: 14px;
}
.psc-action svg {
    transition: transform 0.3s ease;
}
.product-showcase-card:hover .psc-action svg {
    transform: translateX(4px);
}

/* ==================== PRODUCT DETAIL ==================== */
.product-detail-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
    align-items: start;
}
/* Gallery Carousel */
.product-gallery {
    border-radius: 8px;
    overflow: hidden;
    background: #fff;
    border: 1px solid #eef1f5;
}
.pd-gallery-main {
    position: relative;
    aspect-ratio: 1 / 1;
    background: #f8fafc;
    overflow: hidden;
}
.pd-gallery-img {
    position: absolute; inset: 0;
    width: 100%; height: 100%;
    object-fit: contain;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.5s ease;
    pointer-events: none;
}
.pd-gallery-img.active {
    opacity: 1;
    pointer-events: auto;
}
.pd-gallery-thumbs {
    display: flex; gap: 10px;
    padding: 12px 16px;
    border-top: 1px solid #eef1f5;
}
.pd-thumb {
    width: 64px; height: 64px;
    border: 2px solid transparent;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    opacity: 0.55;
    transition: all 0.3s ease;
}
.pd-thumb:hover { opacity: 0.8; }
.pd-thumb.active {
    border-color: var(--secondary);
    opacity: 1;
}
.pd-thumb img {
    width: 100%; height: 100%;
    object-fit: contain;
    padding: 4px;
    background: #f8fafc;
}
/* Product Features */
.pd-features-list {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0;
}
.pd-feature-item {
    padding: 22px 28px;
    border-bottom: 1px solid #eef1f5;
    transition: background 0.3s ease;
}
.pd-feature-item:last-child { border-bottom: none; }
.pd-feature-item:hover { background: #fafbfc; }
.pd-feature-item h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary);
    margin: 0 0 8px 0;
    padding-left: 16px;
    position: relative;
}
.pd-feature-item h4::before {
    content: '';
    position: absolute;
    left: 0; top: 4px; bottom: 4px;
    width: 3px;
    background: var(--secondary);
    border-radius: 2px;
}
.pd-feature-item p {
    font-size: 14px;
    color: #4d5f6e;
    line-height: 1.8;
    margin: 0;
    padding-left: 16px;
}
/* 产品详情内合并展示的产品特点 */
.pd-merged-features {
    margin-top: 36px;
    padding-top: 28px;
    border-top: 1px solid #eef1f5;
}
.pd-feature-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    margin: 0 0 20px 0;
}
.pd-merged-features .pd-features-list { max-width: none; }
/* Tabs */
.pd-tab-nav {
    display: flex; gap: 0;
    border-bottom: 2px solid #eef1f5;
    margin-bottom: 32px;
}
.pd-tab-btn {
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 600;
    color: #8b96a3;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    cursor: pointer;
    transition: all 0.3s ease;
}
.pd-tab-btn:hover { color: var(--secondary); }
.pd-tab-btn.active {
    color: var(--secondary);
    border-bottom-color: var(--secondary);
}
.pd-tab-pane { display: none; }
.pd-tab-pane.active { display: block; }
/* Video Placeholder */
.pd-video-placeholder {
    background: linear-gradient(135deg, var(--primary) 0%, #234b48 100%);
    border-radius: 8px;
    aspect-ratio: 16 / 9;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform 0.3s ease;
}
.pd-video-placeholder:hover { transform: scale(1.01); }
.pd-video-icon {
    width: 72px; height: 72px;
    border-radius: 50%;
    background: rgba(255,255,255,0.15);
    display: flex; align-items: center; justify-content: center;
    font-size: 24px;
    color: #fff;
    margin-bottom: 16px;
}
.pd-video-placeholder p {
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 6px 0;
}
.pd-video-placeholder span {
    color: rgba(255,255,255,0.55);
    font-size: 13px;
}
.pd-video-player {
    width: 100%;
    aspect-ratio: 16 / 9;
    border-radius: 8px;
    /* background: #000; */
    display: block;
}
.product-info h2 { font-size: 30px; color: var(--primary); margin-bottom: 8px; }
.product-info .subtitle { font-size: 15px; color: var(--text-muted); margin-bottom: 24px; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table td {
    padding: 12px 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}
.spec-table td:first-child {
    font-weight: 600; color: var(--primary);
    width: 120px;
    background: var(--gray-50);
}

/* ==================== NEWS PAGE ==================== */
.news-list { display: grid; gap: 20px; }
.news-list-item {
    display: grid; grid-template-columns: 240px 1fr; gap: 28px;
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: var(--transition);
    text-decoration: none; color: inherit;
}
.news-list-item:hover { box-shadow: var(--shadow); }
.news-list-image {
    flex: 0 0 280px;
    min-height: 180px;
    overflow: hidden;
    position: relative;
    background: #eef1f5;
}
.news-list-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    inset: 0;
    transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.news-list-item:hover .news-list-image img {
    transform: scale(1.18);
}
.news-list-body { padding: 20px 24px 20px 0; display: flex; flex-direction: column; }
.news-list-date { font-size: 12px; color: var(--text-muted); margin-bottom: 8px; }
.news-list-body h3 { font-size: 18px; color: var(--primary); margin-bottom: 8px; }
.news-list-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; flex: 1; }

/* ==================== NEWS DETAIL PAGE ==================== */
.article-container {
    max-width: 840px;
    margin: 0 auto;
}
.article-header {
    margin-bottom: 32px;
}
.article-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--secondary);
    background: rgba(71,172,171,0.08);
    padding: 4px 14px;
    border-radius: 50px;
    margin-bottom: 16px;
}
.article-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1.4;
    margin-bottom: 16px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 13px;
    color: var(--text-muted);
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.article-cover {
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 36px;
    background: var(--gray-100);
}
.article-cover img {
    width: 100%;
    aspect-ratio: 2 / 1;
    object-fit: cover;
}
.article-body {
    font-size: 15px;
    color: var(--text-light);
    line-height: 2;
    margin-bottom: 36px;
}
.article-body p {
    margin-bottom: 20px;
}
.article-body h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    margin: 36px 0 16px;
    padding-left: 14px;
    border-left: 3px solid var(--secondary);
}
.article-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary);
    margin: 28px 0 12px;
}
.article-body ul {
    margin: 16px 0;
    padding-left: 20px;
    list-style: disc;
}
.article-body ul li {
    margin-bottom: 8px;
    padding-left: 4px;
}
.article-body ul li::marker {
    color: var(--secondary);
}
.article-body img {
    border-radius: var(--radius-sm);
    margin: 24px 0;
}
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.article-tags a {
    display: inline-block;
    font-size: 12px;
    padding: 6px 14px;
    border-radius: 50px;
    background: var(--gray-100);
    color: var(--gray-600);
    transition: var(--transition);
}
.article-tags a:hover {
    background: var(--secondary);
    color: var(--white);
}
/* Article nav */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.article-nav-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 20px;
    border-radius: var(--radius-sm);
    background: var(--gray-50);
    transition: var(--transition);
}
.article-nav-item:hover {
    background: rgba(71,172,171,0.06);
}
.article-nav-next {
    text-align: right;
    align-items: flex-end;
}
.article-nav-label {
    font-size: 12px;
    color: var(--text-muted);
}
.article-nav-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.article-back {
    text-align: center;
}

/* ==================== CONTACT PAGE ==================== */
.contact-section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.contact-highlight {
    color: #47ACAB;
    transition: all 0.3s ease;
}
.contact-divider {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 24px;
    opacity: 0.6;
    transition: opacity 0.3s ease;
}
.contact-section-title:hover .contact-divider {
    opacity: 1;
    color: #47ACAB;
}
.contact-main {
    color: var(--primary);
    transition: color 0.3s ease;
}
.contact-section-title:hover .contact-main {
    color: #2c5238;
}

.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: stretch; }
.contact-info {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 100%;
}
.contact-info .section-desc { margin-left: 0; margin-right: 0; max-width: none; }
.contact-info-list { display: flex; flex-direction: column; gap: 16px; flex: 1; justify-content: space-between; margin-top: 24px; }
.contact-info-item {
    display: flex; gap: 16px; align-items: flex-start;
    padding: 0;
    background: transparent;
    border-radius: 0;
    border: none;
    transition: var(--transition);
}
.contact-info-item:hover { background: rgba(71,172,171,0.04); }
.contact-info-icon {
    width: 48px; height: 48px;
    background: rgba(71,172,171,0.08);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; justify-content: center;
    font-size: 22px;
    color: var(--secondary);
    flex-shrink: 0;
}
.contact-info-text h4 { font-size: 15px; color: var(--primary); margin-bottom: 4px; }
.contact-info-text p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

.contact-form {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}
.form-group { margin-bottom: 20px; }
.form-group label {
    display: block; font-size: 14px; font-weight: 600;
    color: var(--primary); margin-bottom: 8px;
}
.form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: var(--transition);
    background: var(--gray-50);
    color: var(--text);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--secondary);
    box-shadow: 0 0 0 3px rgba(71,172,171,0.1);
    background: var(--white);
}
.form-group textarea { min-height: 120px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.map-placeholder {
    margin-top: 48px;
    border-radius: var(--radius);
    overflow: hidden;
}
.map-placeholder img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius);
}
.map-placeholder .map-embed iframe {
    width: 100% !important;
    height: 460px !important;
    border: 0;
    display: block;
}

/* ==================== SUPPORT / DOWNLOAD PAGE ==================== */
.download-filter {
    display: flex; flex-wrap: wrap; gap: 10px;
    justify-content: center; margin-bottom: 36px;
}
.download-filter-btn {
    padding: 8px 22px;
    border-radius: 50px;
    border: 1px solid var(--border);
    background: var(--white);
    font-size: 14px;
    color: var(--text-light);
    cursor: pointer;
    transition: var(--transition);
}
.download-filter-btn:hover { border-color: var(--secondary); color: var(--secondary); }
.download-filter-btn.active {
    background: var(--secondary); color: var(--white); border-color: var(--secondary);
}
.download-list { display: grid; gap: 16px; }
.download-item {
    display: flex; align-items: center; gap: 20px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 24px;
    transition: var(--transition);
}
.download-item:hover { box-shadow: var(--shadow); border-color: var(--secondary); }
.download-icon { 
    flex-shrink: 0;
    width: 56px; height: 56px;
    display: flex; align-items: center; justify-content: center;
    background: var(--gray-50); border-radius: var(--radius-sm);
}
.download-icon svg { display: block; }
.download-info { flex: 1; min-width: 0; }
.download-info h4 {
    font-size: 16px; font-weight: 600;
    color: var(--primary); margin-bottom: 4px;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.download-info p {
    font-size: 13px; color: var(--text-muted);
    margin-bottom: 8px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
    overflow: hidden;
}
.download-meta {
    display: flex; flex-wrap: wrap; gap: 16px;
    font-size: 12px; color: var(--gray-500);
}
.btn-download {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 10px 20px;
    background: var(--secondary); color: var(--white);
    border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 600;
    white-space: nowrap; flex-shrink: 0;
    text-decoration: none;
    transition: var(--transition);
}
.btn-download:hover { background: var(--primary); color: var(--white); }
.btn-download-disabled,
.btn-download-disabled:hover {
    background: var(--gray-400); color: var(--white);
    cursor: not-allowed; pointer-events: none;
}

/* ==================== SUPPORT CTA / FAQ / EMPTY ==================== */
.support-cta {
    background: linear-gradient(135deg, var(--primary), #0f3460);
    border-radius: 12px;
    padding: 48px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    color: #fff;
}
.support-cta-content h2 { color: #fff; font-size: 24px; margin-bottom: 8px; }
.support-cta-content p { color: rgba(255,255,255,0.85); margin: 0; }
.support-cta .btn-primary { flex-shrink: 0; }

.download-empty {
    text-align: center;
    padding: 48px 0;
    color: #999;
    font-size: 15px;
    background: #fafafa;
    border-radius: 8px;
}

.faq-list { max-width: 760px; margin: 0 auto; }
.faq-item {
    background: #fff;
    border: 1px solid #eef0f4;
    border-radius: 8px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: box-shadow 0.3s;
}
.faq-item:hover { box-shadow: 0 4px 16px rgba(0,0,0,0.06); }
.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 18px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    color: #1a1a2e;
    text-align: left;
    gap: 16px;
    font-family: inherit;
}
.faq-question:hover { color: var(--secondary); }
.faq-icon {
    font-size: 20px;
    color: var(--secondary);
    transition: transform 0.3s;
    flex-shrink: 0;
    line-height: 1;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 24px;
}
.faq-item.open .faq-answer {
    max-height: 320px;
    padding: 0 24px 18px;
}
.faq-answer p { color: #666; line-height: 1.8; margin: 0; }

/* ==================== ABOUT SIDEBAR LAYOUT ==================== */
.about-layout {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.about-sidebar {
    width: 260px;
    flex-shrink: 0;
    position: sticky;
    top: 100px;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.about-sidebar-header {
    background: var(--secondary);
    color: #fff;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    padding: 16px 0;
}

.about-sidebar-nav a {
    display: block;
    padding: 14px 24px;
    color: #555;
    font-size: 15px;
    border-bottom: 1px solid #f0f0f0;
    transition: all 0.2s;
    text-decoration: none;
}

.about-sidebar-nav a:last-child {
    border-bottom: none;
}

.about-sidebar-nav a:hover,
.about-sidebar-nav a.active {
    background: rgba(71,172,171,0.08);
    color: var(--secondary);
    border-left: 3px solid var(--secondary);
    padding-left: 21px;
}

.about-content {
    flex: 1;
    min-width: 0;
}

.about-section {
    margin-bottom: 64px;
}

.about-section:last-child {
    margin-bottom: 0;
}

.about-section-highlight {
    background: var(--gray-50);
    border-radius: 8px;
    padding: 32px;
    margin-left: -32px;
    margin-right: -32px;
}

.about-section-title {
    font-size: 24px;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 28px;
    padding-bottom: 12px;
    border-bottom: 2px solid #e8eaf6;
    position: relative;
}

.about-section-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background: #5ebfbd;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .hero-slide-content { text-align: center; padding: 60px 24px; }
    .hero-subtitle { margin: 0 auto 36px; }
    .hero-title { font-size: 36px; }
    .hero-arrow { width: 40px; height: 40px; font-size: 16px; }
    .hero-arrow-left { left: 12px; }
    .hero-arrow-right { right: 12px; }
    .features-grid { grid-template-columns: repeat(2, 1fr); }
    .about-preview-grid { grid-template-columns: 1fr; }
    .products-grid, .products-grid-full { grid-template-columns: repeat(2, 1fr); }
    .products-showcase { gap: 24px; }
    .psc-image { height: 280px; }
    .psc-title { font-size: 22px; }
    .news-grid { grid-template-columns: repeat(2, 1fr); }
    .partners-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .product-detail-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .cert-grid { gap: 24px; max-width: 100%; }
    .section { padding: 56px 0; }

    .about-layout {
        flex-direction: column;
        gap: 32px;
    }

    .about-sidebar {
        width: 100%;
        position: static;
        top: auto;
    }

    .about-sidebar-nav {
        display: flex;
        flex-wrap: wrap;
    }

    .about-sidebar-nav a {
        flex: 1 1 auto;
        text-align: center;
        border-bottom: none;
        border-right: 1px solid #f0f0f0;
        padding: 12px 16px;
        font-size: 14px;
    }

    .about-sidebar-nav a:last-child {
        border-right: none;
    }

    .about-sidebar-nav a:hover,
    .about-sidebar-nav a.active {
        border-left: none;
        padding-left: 16px;
    }

    .about-section-highlight {
        margin-left: 0;
        margin-right: 0;
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .logo img { height: 60px; }
    .logo { max-width: 300px; }
    .header-inner { padding: 0 16px; }
    .header-actions .btn { display: none; }
    .header-actions { gap: 8px; }
    .nav { display: none; }
    .menu-toggle { display: flex; }
    .lang-dropdown-menu { right: auto; left: 0; }
    .lang-dropdown-toggle { padding: 6px 10px; font-size: 12px; }
    .hero-carousel { height: 560px; min-height: auto; }
    .hero-slide-content { padding: 90px 20px 160px; text-align: center; }
    .hero-title { font-size: 28px; }
    .hero-subtitle { font-size: 15px; margin: 0 auto 28px; }
    .hero-arrow { width: 36px; height: 36px; font-size: 14px; }
    .hero-arrow-left { left: 8px; }
    .hero-arrow-right { right: 8px; }
    .hero-dots { bottom: 24px; }
    .section-title { font-size: 26px; }
    .section-title-inline { font-size: 22px; gap: 6px; }
    .features-grid { grid-template-columns: 1fr; }
    .products-grid, .products-grid-full { grid-template-columns: 1fr; }
    .products-showcase { grid-template-columns: 1fr; gap: 20px; }
    .psc-image { height: 260px; }
    .psc-body { padding: 20px 22px 24px; }
    .psc-title { font-size: 20px; }
    .psc-subtitle { font-size: 15px; }
    .news-grid { grid-template-columns: 1fr; }
    .partners-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .news-list-item { grid-template-columns: 1fr; }
    .news-list-body { padding: 20px; }
    .page-hero h1 { font-size: 28px; }
    .form-row { grid-template-columns: 1fr; }
    .leadership-grid { grid-template-columns: 1fr; gap: 32px; }
    .leadership-title { font-size: 26px; }
    .leadership-image { max-height: 320px; }
    .cert-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .cert-body { padding: 16px 20px 22px; }
    .cert-name { font-size: 15px; }
    .cert-meta { font-size: 12px; }
    .cert-meta-label { font-size: 11px; }
    .pd-tab-btn { padding: 12px 20px; font-size: 14px; }
    .article-container { padding: 0 16px; }
    .article-title { font-size: 24px; }
    .article-body { font-size: 14px; }
    .download-item { flex-wrap: wrap; padding: 16px; }
    .download-info { flex: 1 1 100%; }
    .btn-download { width: 100%; justify-content: center; }
    .article-body h2 { font-size: 19px; }
    .article-nav { grid-template-columns: 1fr; }
    .article-cover img { aspect-ratio: 3 / 2; }
}

@media (max-width: 576px) {
    .cert-grid { grid-template-columns: 1fr; gap: 20px; max-width: 360px; margin: 0 auto; }
    .cert-body { padding: 18px 24px 26px; }
    .pd-feature-item { padding: 18px 20px; }
    .pd-feature-item h4 { font-size: 15px; }
    .pd-feature-item p { font-size: 13px; }
    .pd-tab-nav { overflow-x: auto; }
    .pd-tab-btn { padding: 10px 16px; font-size: 13px; white-space: nowrap; }
    .pd-gallery-thumbs { gap: 6px; padding: 10px 12px; }
    .pd-thumb { width: 48px; height: 48px; }
}

/* ==================== ANIMATIONS ==================== */
.fade-up {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.visible { opacity: 1; transform: translateY(0); }

/* ==================== IMAGE LIGHTBOX (图片点击放大) ==================== */
.img-lightbox {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 10000;
    background: rgba(10, 14, 20, 0.92);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: 24px;
    animation: lightboxFade .25s ease;
}
.img-lightbox img {
    max-width: 92vw;
    max-height: 80vh;
    object-fit: contain;
    background: #fff;
    border-radius: 6px;
    box-shadow: 0 16px 60px rgba(0,0,0,.55);
    animation: lightboxZoom .28s ease;
}
.img-lightbox .lightbox-title {
    margin-top: 18px;
    color: #fff;
    font-size: 15px;
    letter-spacing: .05em;
    text-align: center;
    max-width: 80vw;
}
.img-lightbox .lightbox-close {
    position: absolute;
    top: 16px; right: 20px;
    width: 44px; height: 44px;
    border: none; border-radius: 50%;
    background: rgba(255,255,255,.12);
    color: #fff;
    font-size: 28px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s ease, transform .2s ease;
}
.img-lightbox .lightbox-close:hover { background: rgba(255,255,255,.26); transform: rotate(90deg); }
.img-lightbox .lightbox-hint {
    position: absolute;
    bottom: 18px;
    left: 0; right: 0;
    text-align: center;
    color: rgba(255,255,255,.45);
    font-size: 12px;
    letter-spacing: .1em;
}
@keyframes lightboxFade { from { opacity: 0; } to { opacity: 1; } }
@keyframes lightboxZoom { from { transform: scale(.94); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@media (max-width: 575px) {
    .img-lightbox img { max-width: 96vw; max-height: 74vh; }
    .img-lightbox .lightbox-close { top: 10px; right: 10px; width: 38px; height: 38px; font-size: 24px; }
}


/* ==================== Cookie 同意提示 ==================== */
.cookie-consent {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1200;
    background: rgba(20, 32, 44, .96);
    color: #fff;
    box-shadow: 0 -6px 24px rgba(0, 0, 0, .18);
    transform: translateY(110%);
    transition: transform .35s ease;
    backdrop-filter: blur(6px);
}
.cookie-consent.show { transform: translateY(0); }
.cookie-consent-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.cookie-consent-text {
    flex: 1;
    margin: 0;
    font-size: 13px;
    line-height: 1.6;
    color: rgba(255, 255, 255, .82);
}
.cookie-consent-text a { color: #7fd4d3; text-decoration: underline; }
.cookie-consent-text a:hover { color: #a7e6e5; }
.cookie-consent-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.cookie-consent .cookie-accept { padding: 10px 26px; font-size: 14px; }
.cookie-consent .cookie-reject {
    padding: 10px 22px;
    font-size: 14px;
    background: transparent;
    color: rgba(255, 255, 255, .85);
    border: 1.5px solid rgba(255, 255, 255, .45);
}
.cookie-consent .cookie-reject:hover {
    background: rgba(255, 255, 255, .14);
    color: #fff;
    border-color: rgba(255, 255, 255, .75);
}
@media (max-width: 767px) {
    .cookie-consent-inner { flex-direction: column; align-items: flex-start; gap: 12px; padding: 14px 18px; }
    .cookie-consent-actions { width: 100%; }
    .cookie-consent .cookie-accept,
    .cookie-consent .cookie-reject { flex: 1; justify-content: center; }
}

/* ==================== 隐私政策 / 用户协议 ==================== */
.legal-content {
    max-width: 860px;
    margin: 0 auto;
    font-size: 15px;
    line-height: 1.9;
    color: #4a4a4a;
}
.legal-content h3 {
    margin: 30px 0 12px;
    font-size: 18px;
    font-weight: 600;
    color: #1a1a1a;
}
.legal-content p { margin: 0 0 14px; }
.legal-content ul, .legal-content ol { margin: 0 0 14px 22px; }
.legal-content li { margin-bottom: 6px; }
.legal-content a { color: var(--primary, #47acab); }
@media (max-width: 767px) {
    .legal-content { font-size: 14px; line-height: 1.8; }
    .legal-content h3 { margin-top: 22px; font-size: 16px; }
}