/* ============================================================
   晋宝智能 Jinbao Intelligent - 企业官网全局样式
   品牌色：深蓝 #1a3a5c / 主蓝 #2563eb / 浅蓝 #60a5fa
   ============================================================ */

/* === CSS Variables === */
:root {
    --deep-blue: #1a3a5c;
    --primary-blue: #2563eb;
    --light-blue: #60a5fa;
    --sky-blue: #93bbfd;
    --pale-blue: #dbeafe;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --text-light: #94a3b8;
    --white: #ffffff;
    --border: #e2e8f0;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
    --nav-height: 72px;
}

/* === Reset === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    color: var(--text-dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* === Utility Classes === */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}
.section-subtitle {
    text-align: center;
    color: var(--text-gray);
    font-size: 1.05rem;
    margin-bottom: 48px;
}
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 28px; border-radius: var(--radius); font-size: 0.95rem; font-weight: 600;
    transition: var(--transition); white-space: nowrap;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--light-blue));
    color: var(--white);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(37,99,235,0.35); }
.btn-outline {
    background: transparent; color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}
.btn-outline:hover { background: var(--primary-blue); color: var(--white); }
.btn-white { background: var(--white); color: var(--primary-blue); }
.btn-white:hover { background: var(--pale-blue); }

/* === Header / Navigation === */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    height: var(--nav-height); background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px); border-bottom: 1px solid transparent;
    transition: var(--transition);
}
.header.scrolled {
    background: rgba(255,255,255,0.98);
    border-bottom-color: var(--border);
    box-shadow: var(--shadow);
}
.header .container {
    display: flex; align-items: center; justify-content: space-between;
    height: 100%;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { height: 40px; width: auto; }
.logo span { font-size: 1.25rem; font-weight: 700; color: var(--deep-blue); }

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
    padding: 8px 16px; border-radius: 6px; font-size: 0.92rem; font-weight: 500;
    color: var(--text-dark); transition: var(--transition);
}
.nav a:hover, .nav a.active { background: var(--pale-blue); color: var(--primary-blue); }
.nav .btn-login { margin-left: 12px; }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; padding: 8px; }
.hamburger span { width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: var(--transition); }
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* === Hero Slider === */
.hero { position: relative; width: 100%; height: 560px; overflow: hidden; margin-top: var(--nav-height); }
.hero-slide { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 0;
    transition: opacity 0.8s ease; display: flex; align-items: center; }
.hero-slide.active { opacity: 1; }
.hero-slide:nth-child(1) { background: linear-gradient(135deg, var(--deep-blue) 0%, #1e4d7a 50%, var(--primary-blue) 100%); }
.hero-slide:nth-child(2) { background: linear-gradient(135deg, #1a3a5c 0%, #1a4d80 50%, #2563eb 100%); }
.hero-slide:nth-child(3) { background: linear-gradient(135deg, #1e4d7a 0%, #1a3a5c 50%, #3b82f6 100%); }
.hero-content { max-width: 600px; color: var(--white); padding: 0 80px; }
.hero-content h1 { font-size: 2.8rem; font-weight: 800; line-height: 1.25; margin-bottom: 16px; }
.hero-content p { font-size: 1.15rem; opacity: 0.9; margin-bottom: 28px; line-height: 1.7; }
.hero-dots { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); display: flex; gap: 10px; z-index: 10; }
.hero-dots span { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.4); cursor: pointer; transition: var(--transition); }
.hero-dots span.active { background: var(--white); width: 32px; border-radius: 6px; }
.hero-arrows { position: absolute; top: 50%; transform: translateY(-50%); width: 100%; display: flex; justify-content: space-between; padding: 0 20px; z-index: 10; pointer-events: none; }
.hero-arrows button { pointer-events: auto; width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,0.2); color: var(--white); font-size: 1.2rem; transition: var(--transition); display: flex; align-items: center; justify-content: center; }
.hero-arrows button:hover { background: rgba(255,255,255,0.4); }

/* === Core Business Cards === */
.business-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.business-card {
    background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 36px 28px; text-align: center; transition: var(--transition);
}
.business-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--light-blue); }
.business-card .card-icon { width: 64px; height: 64px; margin: 0 auto 20px; border-radius: 16px;
    background: linear-gradient(135deg, var(--pale-blue), #eff6ff);
    display: flex; align-items: center; justify-content: center; font-size: 28px; }
.business-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--deep-blue); }
.business-card p { font-size: 0.9rem; color: var(--text-gray); line-height: 1.65; }

/* === Advantages === */
.advantages { background: var(--bg-light); }
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.advantage-item {
    display: flex; flex-direction: column; align-items: center; text-align: center;
    padding: 32px 20px;
}
.advantage-item .adv-icon { width: 72px; height: 72px; border-radius: 50%; background: var(--white);
    display: flex; align-items: center; justify-content: center; font-size: 32px;
    box-shadow: var(--shadow); margin-bottom: 20px; }
.advantage-item h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; }
.advantage-item p { font-size: 0.9rem; color: var(--text-gray); }

/* === Partners === */
.partner-grid { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 40px; }
.partner-item { width: 120px; height: 60px; background: var(--bg-light); border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center; font-size: 0.85rem;
    color: var(--text-light); }

/* === Footer === */
.footer { background: var(--deep-blue); color: rgba(255,255,255,0.8); padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer h4 { color: var(--white); font-size: 1.05rem; font-weight: 700; margin-bottom: 18px; }
.footer p, .footer a { font-size: 0.9rem; line-height: 1.8; color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer a:hover { color: var(--light-blue); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.12); padding-top: 20px; text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.5); }

/* === Page Header (sub pages) === */
.page-header {
    margin-top: var(--nav-height);
    background: linear-gradient(135deg, var(--deep-blue), var(--primary-blue));
    padding: 64px 0; text-align: center; color: var(--white);
}
.page-header h1 { font-size: 2.2rem; font-weight: 800; margin-bottom: 8px; }
.page-header p { font-size: 1rem; opacity: 0.85; }

/* === Products Page === */
.filter-nav { display: flex; justify-content: center; gap: 8px; margin-bottom: 40px; flex-wrap: wrap; }
.filter-nav button {
    padding: 10px 24px; border-radius: 24px; background: var(--bg-light);
    color: var(--text-gray); font-size: 0.9rem; font-weight: 500; transition: var(--transition);
}
.filter-nav button.active, .filter-nav button:hover { background: var(--primary-blue); color: var(--white); }

.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
    background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
    overflow: hidden; transition: var(--transition);
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product-img {
    width: 100%; height: 220px; background: linear-gradient(135deg, var(--pale-blue), #eff6ff);
    display: flex; align-items: center; justify-content: center; font-size: 56px;
}
.product-info { padding: 20px; }
.product-info h3 { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.product-info .product-category { font-size: 0.8rem; color: var(--primary-blue); margin-bottom: 8px; }
.product-info .product-desc { font-size: 0.85rem; color: var(--text-gray); margin-bottom: 12px; }
.product-info .product-price { font-size: 1.2rem; font-weight: 700; color: #e74c3c; margin-bottom: 12px; }
.product-info .btn { width: 100%; font-size: 0.85rem; padding: 10px; }

/* === About Page === */
.timeline { position: relative; padding: 20px 0; }
.timeline::before { content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--border); transform: translateX(-50%); }
.timeline-item { display: flex; align-items: flex-start; margin-bottom: 40px; position: relative; }
.timeline-item:nth-child(odd) { flex-direction: row; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }
.timeline-dot { width: 16px; height: 16px; border-radius: 50%; background: var(--primary-blue); position: absolute; left: 50%; top: 6px; transform: translateX(-50%); z-index: 2; }
.timeline-content { width: 45%; padding: 20px 24px; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius); }
.timeline-content .year { font-size: 1.3rem; font-weight: 800; color: var(--primary-blue); margin-bottom: 4px; }
.culture-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.culture-card {
    background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 32px 24px; text-align: center;
}
.culture-card .culture-icon { font-size: 40px; margin-bottom: 16px; }
.culture-card h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 10px; color: var(--deep-blue); }
.culture-card p { font-size: 0.9rem; color: var(--text-gray); line-height: 1.7; }

/* === News Page === */
.news-list { display: flex; flex-direction: column; gap: 24px; }
.news-item { display: flex; gap: 24px; padding: 24px; background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg); transition: var(--transition); }
.news-item:hover { box-shadow: var(--shadow); border-color: var(--light-blue); }
.news-thumb { width: 240px; height: 160px; flex-shrink: 0; border-radius: var(--radius); background: linear-gradient(135deg, var(--pale-blue), #eff6ff); display: flex; align-items: center; justify-content: center; font-size: 40px; }
.news-info { flex: 1; display: flex; flex-direction: column; }
.news-info h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 8px; }
.news-info .news-date { font-size: 0.85rem; color: var(--text-light); margin-bottom: 12px; }
.news-info .news-excerpt { font-size: 0.92rem; color: var(--text-gray); line-height: 1.7; flex: 1; }
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.pagination button { width: 40px; height: 40px; border-radius: var(--radius); background: var(--bg-light); color: var(--text-gray); font-weight: 500; transition: var(--transition); }
.pagination button.active, .pagination button:hover { background: var(--primary-blue); color: var(--white); }

/* === Contact Page === */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; }
.contact-info h3 { font-size: 1.3rem; font-weight: 700; margin-bottom: 24px; }
.contact-info .info-item { display: flex; gap: 14px; margin-bottom: 20px; align-items: flex-start; }
.contact-info .info-item .info-icon { width: 44px; height: 44px; border-radius: 50%; background: var(--pale-blue); display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.contact-info .info-item .info-text h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 2px; }
.contact-info .info-item .info-text p { font-size: 0.9rem; color: var(--text-gray); }
.map-placeholder { width: 100%; height: 280px; background: var(--bg-light); border-radius: var(--radius-lg); display: flex; align-items: center; justify-content: center; color: var(--text-light); font-size: 0.9rem; margin-top: 24px; }

.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 6px; color: var(--text-dark); }
.form-group input, .form-group textarea {
    width: 100%; padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius);
    font-size: 0.95rem; transition: var(--transition); outline: none; background: var(--bg-light);
}
.form-group input:focus, .form-group textarea:focus { border-color: var(--primary-blue); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); background: var(--white); }
.form-group textarea { min-height: 140px; resize: vertical; }

/* === Shop Page === */
.shop-layout { display: grid; grid-template-columns: 1fr 360px; gap: 32px; align-items: start; }
.cart-sidebar {
    background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-lg);
    padding: 24px; position: sticky; top: calc(var(--nav-height) + 24px);
}
.cart-sidebar h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 16px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.cart-empty { text-align: center; color: var(--text-light); padding: 32px 0; font-size: 0.9rem; }
.cart-item { display: flex; gap: 12px; margin-bottom: 14px; padding-bottom: 14px; border-bottom: 1px solid var(--border); }
.cart-item-img { width: 60px; height: 60px; border-radius: 6px; background: var(--pale-blue); flex-shrink: 0; }
.cart-item-info { flex: 1; }
.cart-item-info h4 { font-size: 0.9rem; font-weight: 600; margin-bottom: 4px; }
.cart-item-info .cart-item-price { font-size: 0.9rem; font-weight: 700; color: #e74c3c; }
.cart-item-qty { display: flex; align-items: center; gap: 8px; margin-top: 6px; }
.cart-item-qty button { width: 26px; height: 26px; border-radius: 4px; background: var(--bg-light); font-size: 0.9rem; display: flex; align-items: center; justify-content: center; }
.cart-item-qty span { font-size: 0.9rem; min-width: 20px; text-align: center; }
.cart-item-remove { font-size: 0.75rem; color: #e74c3c; background: none; margin-top: 4px; }
.cart-total { margin-top: 16px; padding-top: 12px; border-top: 2px solid var(--border); display: flex; justify-content: space-between; font-size: 1.1rem; font-weight: 700; }
.cart-total .total-amount { color: #e74c3c; font-size: 1.3rem; }
.checkout-btn { width: 100%; margin-top: 16px; font-size: 1rem; padding: 14px; }

/* Payment Modal */
.modal-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 2000; display: flex; align-items: center; justify-content: center; }
.modal { background: var(--white); border-radius: var(--radius-lg); padding: 36px; max-width: 500px; width: 90%; text-align: center; }
.modal h3 { font-size: 1.3rem; margin-bottom: 20px; }
.modal .qr-placeholder { width: 220px; height: 220px; margin: 0 auto 20px; background: var(--bg-light); border: 2px dashed var(--border); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; color: var(--text-light); font-size: 0.9rem; }
.modal .payment-steps { text-align: left; font-size: 0.9rem; color: var(--text-gray); line-height: 2; }
.modal .btn-close { margin-top: 20px; }

/* === Login Page === */
.auth-container { max-width: 440px; margin: 0 auto; background: var(--white); border-radius: var(--radius-lg); padding: 40px; box-shadow: var(--shadow-lg); }
.auth-tabs { display: flex; margin-bottom: 28px; border-bottom: 2px solid var(--border); }
.auth-tabs button { flex: 1; padding: 12px; font-size: 1.05rem; font-weight: 600; background: none; color: var(--text-gray); border-bottom: 2px solid transparent; margin-bottom: -2px; transition: var(--transition); }
.auth-tabs button.active { color: var(--primary-blue); border-bottom-color: var(--primary-blue); }
.auth-form { display: none; }
.auth-form.active { display: block; }
.error-msg { color: #e74c3c; font-size: 0.8rem; margin-top: 4px; display: none; }
.success-msg { color: #10b981; font-size: 0.9rem; margin-top: 12px; text-align: center; display: none; }

/* === Responsive === */
@media (max-width: 1024px) {
    .business-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid { grid-template-columns: repeat(3, 1fr); }
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .shop-layout { grid-template-columns: 1fr; }
    .cart-sidebar { position: static; }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    :root { --nav-height: 60px; }
    .section { padding: 56px 0; }
    .section-title { font-size: 1.6rem; }
    .hero { height: 380px; }
    .hero-content { padding: 0 32px; }
    .hero-content h1 { font-size: 1.8rem; }
    .hero-content p { font-size: 0.95rem; }
    .hero-arrows { display: none; }

    .hamburger { display: flex; }
    .nav {
        position: fixed; top: var(--nav-height); left: 0; right: 0;
        background: var(--white); flex-direction: column; padding: 16px 0;
        box-shadow: var(--shadow-lg); transform: translateY(-120%); transition: var(--transition);
        gap: 0;
    }
    .nav.open { transform: translateY(0); }
    .nav a { padding: 12px 24px; width: 100%; border-radius: 0; }
    .nav .btn-login { margin: 8px 24px; width: calc(100% - 48px); }

    .business-grid { grid-template-columns: 1fr; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .advantage-grid { grid-template-columns: 1fr; }
    .culture-grid { grid-template-columns: 1fr; }
    .news-item { flex-direction: column; }
    .news-thumb { width: 100%; height: 180px; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .timeline::before { left: 20px; }
    .timeline-item, .timeline-item:nth-child(even) { flex-direction: row; }
    .timeline-dot { left: 20px; }
    .timeline-content { width: calc(100% - 50px); margin-left: 50px; }
}