/* ===== CSS Variables & Reset ===== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --accent: #f59e0b;
    --accent-light: #fef3c7;
    --success: #10b981;
    --danger: #ef4444;
    --dark: #111827;
    --gray-900: #1f2937;
    --gray-800: #374151;
    --gray-700: #4b5563;
    --gray-600: #6b7280;
    --gray-500: #9ca3af;
    --gray-400: #b0b7c3;
    --gray-300: #d1d5db;
    --gray-200: #e5e7eb;
    --gray-100: #f3f4f6;
    --gray-50: #f9fafb;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1), 0 4px 6px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px rgba(0,0,0,0.1), 0 10px 10px rgba(0,0,0,0.04);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
    --nav-height: 70px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

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

.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== Navbar ===== */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-md); }

.nav-container {
    max-width: var(--max-width); margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    height: var(--nav-height); padding: 0 24px;
}

.nav-logo {
    font-size: 1.25rem; font-weight: 700; color: var(--primary);
    text-decoration: none; display: flex; align-items: center; gap: 8px;
}
.nav-logo i { font-size: 1.5rem; color: var(--accent); }

.nav-menu { display: flex; list-style: none; gap: 4px; }
.nav-link {
    color: var(--gray-700); text-decoration: none;
    padding: 8px 16px; border-radius: var(--radius);
    font-size: 0.95rem; font-weight: 500;
    transition: var(--transition);
}
.nav-link:hover { color: var(--primary); background: var(--primary-light); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.nav-toggle span {
    width: 24px; height: 2px; background: var(--gray-800);
    transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
    position: relative; min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 50%, #7c3aed 100%);
    overflow: hidden; text-align: center; color: var(--white); padding: 100px 24px 60px;
}
.hero::before {
    content: '';
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.hero-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: radial-gradient(circle at 30% 50%, rgba(37,99,235,0.3) 0%, transparent 70%),
                radial-gradient(circle at 70% 30%, rgba(124,58,237,0.2) 0%, transparent 70%);
}
.hero-content { position: relative; z-index: 1; max-width: 800px; }
.hero-icon { display: block; font-size: 3rem; margin-bottom: 16px; animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.7} }

.hero-title { font-size: 3rem; font-weight: 800; margin-bottom: 16px; line-height: 1.2; }
.hero-subtitle { font-size: 1.25rem; opacity: 0.9; margin-bottom: 36px; font-weight: 400; }

.hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 48px; }
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 32px; border-radius: 50px; font-size: 1rem;
    font-weight: 600; text-decoration: none; cursor: pointer;
    transition: var(--transition); border: 2px solid transparent;
}
.btn-primary { background: var(--white); color: var(--primary); }
.btn-primary:hover { background: var(--gray-100); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.5); }
.btn-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }

.hero-stats { display: flex; gap: 48px; justify-content: center; }
.stat-item { display: flex; flex-direction: column; align-items: center; }
.stat-number { font-size: 2rem; font-weight: 800; }
.stat-label { font-size: 0.9rem; opacity: 0.8; }

.hero-scroll {
    position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    opacity: 0.6; font-size: 0.85rem; animation: bounce 2s infinite;
}
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(10px)} }

/* ===== Sections ===== */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-title { font-size: 2rem; font-weight: 800; color: var(--dark); margin-bottom: 12px; }
.section-desc { font-size: 1.1rem; color: var(--gray-600); max-width: 600px; margin: 0 auto; }

/* ===== Service Categories ===== */
.services { background: var(--gray-50); }
.service-category { margin-bottom: 48px; background: var(--white); border-radius: var(--radius-xl); padding: 32px; box-shadow: var(--shadow-sm); }
.highlight-category { border: 2px solid var(--accent); background: linear-gradient(135deg, #fffbeb 0%, #fff 100%); position: relative; }
.highlight-category::before { content: '⭐ 新增'; position: absolute; top: -12px; right: 20px; background: var(--accent); color: #fff; padding: 4px 16px; border-radius: 50px; font-size: 0.85rem; font-weight: 600; }

.cat-header { text-align: center; margin-bottom: 32px; }
.cat-icon { font-size: 2.5rem; color: var(--primary); margin-bottom: 8px; }
.cat-header h3 { font-size: 1.5rem; font-weight: 700; color: var(--dark); }
.cat-subtitle { display: block; color: var(--gray-600); font-size: 0.95rem; margin-top: 4px; }

.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); gap: 20px; }
.service-card {
    background: var(--gray-50); border-radius: var(--radius-lg);
    padding: 28px; transition: var(--transition);
    border: 1px solid var(--gray-200);
}
.service-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); border-color: var(--primary-light); }
.card-icon { font-size: 2rem; color: var(--primary); margin-bottom: 12px; }
.service-card h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 12px; color: var(--gray-900); }
.service-card ul { list-style: none; }
.service-card li {
    padding: 6px 0; font-size: 0.92rem; color: var(--gray-700);
    border-bottom: 1px dashed var(--gray-200);
    position: relative; padding-left: 16px;
}
.service-card li::before { content: '•'; position: absolute; left: 0; color: var(--primary); font-weight: bold; }
.service-card li:last-child { border-bottom: none; }

/* ===== Pricing ===== */
.pricing { background: var(--white); }

.pricing-tabs {
    display: flex; gap: 8px; justify-content: center; flex-wrap: wrap;
    margin-bottom: 32px;
}
.tab-btn {
    padding: 10px 20px; border: 1px solid var(--gray-200);
    background: var(--white); border-radius: var(--radius);
    font-size: 0.95rem; font-weight: 500; color: var(--gray-700);
    cursor: pointer; transition: var(--transition);
}
.tab-btn:hover { border-color: var(--primary); color: var(--primary); }
.tab-btn.active { background: var(--primary); color: var(--white); border-color: var(--primary); }

.pricing-panel { display: none; }
.pricing-panel.active { display: block; }

.price-table {
    width: 100%; border-collapse: collapse;
    background: var(--white); border-radius: var(--radius-lg);
    overflow: hidden; box-shadow: var(--shadow);
}
.price-table thead { background: var(--primary); color: var(--white); }
.price-table th {
    padding: 14px 16px; text-align: left;
    font-weight: 600; font-size: 0.95rem;
}
.price-table td { padding: 12px 16px; border-bottom: 1px solid var(--gray-200); font-size: 0.93rem; }
.price-table tbody tr:hover { background: var(--primary-light); }
.price-table tbody tr:last-child td { border-bottom: none; }

.package-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
.package-card {
    background: var(--white); border-radius: var(--radius-xl);
    padding: 32px; text-align: center; border: 1px solid var(--gray-200);
    position: relative; transition: var(--transition);
}
.package-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.package-card.featured { border-color: var(--primary); box-shadow: var(--shadow-md); }
.package-badge {
    position: absolute; top: -10px; right: 20px;
    background: var(--accent); color: #fff;
    padding: 4px 14px; border-radius: 50px;
    font-size: 0.8rem; font-weight: 600;
}
.package-card h4 { font-size: 1.1rem; margin-bottom: 16px; }
.package-price { font-size: 2rem; font-weight: 800; color: var(--primary); margin-bottom: 16px; }
.package-price span { font-size: 0.9rem; font-weight: 500; color: var(--gray-500); }
.package-card ul { list-style: none; margin-bottom: 20px; }
.package-card li {
    padding: 8px 0; font-size: 0.9rem; color: var(--gray-700);
    border-bottom: 1px dashed var(--gray-200);
}
.package-card li:last-child { border-bottom: none; }

.pricing-note {
    margin-top: 24px; padding: 16px 24px;
    background: var(--gray-50); border-radius: var(--radius);
    border-left: 4px solid var(--primary);
    font-size: 0.9rem; color: var(--gray-600);
}

/* ===== Gallery ===== */
.gallery { background: var(--gray-50); }
.gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; }
.gallery-item {
    background: var(--white); border-radius: var(--radius-lg);
    overflow: hidden; box-shadow: var(--shadow);
    transition: var(--transition);
}
.gallery-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.gallery-img { position: relative; overflow: hidden; height: 220px; }
.gallery-placeholder {
    width: 100%; height: 100%;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 12px;
    background: linear-gradient(135deg, var(--primary-light) 0%, #e0e7ff 100%);
    color: var(--primary); font-size: 0.9rem;
}
.gallery-caption { padding: 14px 18px; font-weight: 600; font-size: 0.95rem; color: var(--gray-800); }

/* ===== Articles ===== */
.articles { background: var(--white); }
.articles-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 24px; }
.article-card {
    background: var(--white); border-radius: var(--radius-lg);
    padding: 28px; border: 1px solid var(--gray-200);
    transition: var(--transition);
}
.article-card:hover { box-shadow: var(--shadow-md); border-color: var(--primary-light); }
.article-date { font-size: 0.85rem; color: var(--gray-500); margin-bottom: 8px; }
.article-card h4 { font-size: 1.1rem; font-weight: 700; margin-bottom: 10px; color: var(--gray-900); }
.article-card p { font-size: 0.93rem; color: var(--gray-600); line-height: 1.7; margin-bottom: 12px; }
.article-link { color: var(--primary); font-weight: 600; text-decoration: none; font-size: 0.9rem; }
.article-link:hover { text-decoration: underline; }

/* ===== Contact ===== */
.contact { background: var(--gray-900); color: var(--white); }
.contact .section-title { color: var(--white); }
.contact .section-desc { color: var(--gray-400); }
.contact-grid { display: grid; grid-template-columns: 1fr 300px; gap: 48px; align-items: center; }
.contact-info { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.contact-item {
    display: flex; gap: 14px; align-items: flex-start;
    padding: 20px; background: rgba(255,255,255,0.05);
    border-radius: var(--radius-lg);
}
.contact-item i { font-size: 1.5rem; color: var(--accent); margin-top: 4px; }
.contact-item h4 { font-size: 0.9rem; color: var(--gray-400); margin-bottom: 4px; }
.contact-item p { font-size: 1.1rem; font-weight: 600; }

.contact-qr { display: flex; justify-content: center; }
.qr-card {
    background: var(--white); color: var(--dark);
    padding: 32px; border-radius: var(--radius-xl);
    text-align: center;
}
.qr-placeholder {
    width: 150px; height: 150px; margin: 0 auto 16px;
    background: var(--gray-100); border-radius: var(--radius);
    display: flex; align-items: center; justify-content: center;
    color: var(--success);
}
.qr-card p { font-weight: 700; font-size: 1.1rem; margin-bottom: 4px; }
.qr-card span { font-size: 0.85rem; color: var(--gray-500); }

/* ===== Footer ===== */
.footer {
    background: #0f172a;
    color: #c5ced9;
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.4fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-brand h3 {
    color: #ffffff;
    font-size: 1.2rem;
    margin-bottom: 12px;
}
.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: #8899aa;
}
.footer-links h4, .footer-contact h4 {
    color: #ffffff;
    font-size: 1rem;
    margin-bottom: 14px;
    position: relative;
    padding-bottom: 10px;
}
.footer-links h4::after, .footer-contact h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 30px;
    height: 2px;
    background: #f59e0b;
    border-radius: 1px;
}
.footer-links ul { list-style: none; }
.footer-links li { padding: 6px 0; font-size: 0.9rem; color: #8899aa; }
.footer-links a {
    color: #8899aa;
    text-decoration: none;
    transition: all 0.2s;
    display: inline-block;
}
.footer-links a:hover { color: #ffffff; padding-left: 6px; }
.footer-contact p {
    font-size: 0.9rem;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    color: #8899aa;
}
.footer-contact i {
    margin-right: 10px;
    color: #f59e0b;
    font-size: 0.85rem;
    width: 16px;
    text-align: center;
}
.footer-bottom {
    border-top: 1px solid #1e293b;
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 0.85rem;
    color: #64748b;
}
.footer-bottom-left { display: flex; flex-direction: column; gap: 6px; }
.footer-bottom-left p { margin: 0; color: #64748b; }
.footer-bottom .last-update { font-size: 0.78rem; color: #475569; }
.footer-bottom-right { display: flex; align-items: center; }
.icp-link {
    color: #475569;
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.3s;
}
.icp-link:hover { color: #8899aa; }

/* ===== Back to top ===== */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px;
    width: 44px; height: 44px;
    background: var(--primary); color: var(--white);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    text-decoration: none; box-shadow: var(--shadow-lg);
    opacity: 0; visibility: hidden; transition: var(--transition);
    z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); transform: translateY(-3px); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .hero-title { font-size: 2.2rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed; top: var(--nav-height); left: 0; width: 100%;
        background: var(--white); flex-direction: column; padding: 16px;
        box-shadow: var(--shadow-lg); transform: translateY(-120%);
        transition: var(--transition); border-bottom: 1px solid var(--gray-200);
    }
    .nav-menu.active { transform: translateY(0); }
    .nav-toggle { display: flex; }
    .hero-title { font-size: 1.8rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-stats { gap: 24px; }
    .stat-number { font-size: 1.5rem; }
    .service-grid { grid-template-columns: 1fr; }
    .pricing-tabs { gap: 4px; }
    .tab-btn { padding: 8px 14px; font-size: 0.85rem; }
    .price-table { font-size: 0.82rem; }
    .price-table th, .price-table td { padding: 8px 10px; }
    .package-cards { grid-template-columns: 1fr; }
    .contact-info { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .footer-bottom-left { align-items: center; }
    .gallery-grid { grid-template-columns: 1fr; }
    .articles-grid { grid-template-columns: 1fr; }
}