/* 华瑞数联 - 统一商业网站样式表 v2.0 */

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

/* ===== CSS Variables ===== */
:root {
    --primary: #2563EB;
    --primary-dark: #1D4ED8;
    --secondary: #7C3AED;
    --dark: #0F172A;
    --darker: #020617;
    --light: #FFFFFF;
    --muted: #94A3B8;
    --border: #E2E8F0;
    --card-bg: #FFFFFF;
    --text: #1E293B;
    --text-light: #64748B;
    --success: #10B981;
    --warning: #F59E0B;
    --danger: #EF4444;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: all 0.3s ease;
}

/* ===== Base Styles ===== */
html { scroll-behavior: smooth }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--light);
    -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: var(--transition) }
ul { list-style: none }
img { max-width: 100%; height: auto; display: block }

/* ===== Layout ===== */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px }
.section { padding: 80px 0 }
.section-alt { background: #F8FAFC }

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow)
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px
}
.logo { display: flex; align-items: center; gap: 12px }
.logo img { width: 48px; height: 48px; border-radius: var(--radius) }
.logo-text { font-size: 1.1rem; font-weight: 700; color: var(--dark) }
.logo-en { font-size: 0.65rem; color: var(--primary); letter-spacing: 1px; display: block }

.nav { display: flex; align-items: center; gap: 4px }
.nav a {
    padding: 10px 16px;
    font-size: 0.95rem;
    color: var(--text-light);
    border-radius: var(--radius);
    transition: var(--transition)
}
.nav a:hover { color: var(--primary); background: #EFF6FF }
.nav a.active { color: var(--primary); font-weight: 500 }

/* Dropdown */
.dropdown { position: relative }
.dropdown .dropbtn { display: flex; align-items: center; gap: 6px }
.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    margin-top: 8px
}
.dropdown:hover .dropdown-content { display: block }
.dropdown-content a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    font-size: 0.9rem;
    color: var(--text-light)
}
.dropdown-content a:hover { color: var(--primary); background: #EFF6FF }
.dropdown-content a i { width: 18px; color: var(--primary); text-align: center }

.phone {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: var(--primary);
    color: var(--light);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition)
}
.phone:hover { background: var(--primary-dark); transform: translateY(-2px) }
.phone i { font-size: 0.85rem }

.menu-btn { display: none }

/* ===== Hero Section ===== */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
    position: relative;
    overflow: hidden
}
.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.1) 0%, transparent 70%);
    border-radius: 50%
}
.hero-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary);
    color: var(--light);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    margin-bottom: 20px
}
.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    color: var(--dark);
    line-height: 1.2;
    margin-bottom: 8px
}
.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 20px
}
.hero-desc {
    font-size: 1.05rem;
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.8
}
.hero-btns { display: flex; gap: 15px; flex-wrap: wrap }
.hero-stats {
    display: flex;
    gap: 60px;
    padding-top: 30px;
    margin-top: 30px;
    border-top: 1px solid var(--border)
}
.stat-item { text-align: center; display: flex; align-items: center; gap: 15px; }
.stat-num { font-size: 2.8rem; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 1.1rem; color: var(--text-light); white-space: nowrap; }

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative
}
.hero-glow {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
    border-radius: 50%
}
.hero-box {
    position: relative;
    width: 280px;
    height: 280px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 25px 50px -12px rgba(37, 99, 235, 0.25);
    z-index: 1
}
.hero-icon { font-size: 5rem; color: var(--light) }
.hero-box-ring {
    position: absolute;
    width: 340px;
    height: 340px;
    border: 2px solid rgba(37, 99, 235, 0.2);
    border-radius: 50%;
    animation: pulse-ring 2s ease-out infinite
}
.hero-box-ring:nth-child(3) { width: 400px; height: 400px; animation-delay: 0.5s }
@keyframes pulse-ring {
    0% { transform: scale(1); opacity: 1 }
    100% { transform: scale(1.1); opacity: 0 }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    border: none
}
.btn-primary { background: var(--primary); color: var(--light) }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px) }
.btn-outline {
    background: transparent;
    border: 2px solid var(--border);
    color: var(--text)
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary) }
.btn-white { background: var(--light); color: var(--primary) }
.btn-white:hover { background: #F1F5F9 }

/* ===== Section Headers ===== */
.section-header { text-align: center; margin-bottom: 50px }
.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 10px
}
.section-subtitle { font-size: 1rem; color: var(--text-light) }
.tag {
    display: inline-block;
    padding: 6px 14px;
    background: #EFF6FF;
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 50px
}

/* ===== Cards ===== */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px }

.case-card {
    background: var(--light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border)
}
.case-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg) }
.case-card img { width: 100%; height: 180px; object-fit: cover }
.case-content { padding: 20px }
.case-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--primary);
    color: var(--light);
    font-size: 0.75rem;
    border-radius: 4px;
    margin-bottom: 10px
}
.case-card h3 { font-size: 1.1rem; margin-bottom: 8px; color: var(--dark) }
.case-card p { font-size: 0.85rem; color: var(--text-light) }

.product-card {
    background: var(--light);
    border-radius: var(--radius-xl);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border)
}
.product-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg) }
.product-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: var(--light)
}
.product-card h3 { font-size: 1.15rem; margin-bottom: 10px; color: var(--dark) }
.product-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7 }
.learn-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 15px;
    font-size: 0.9rem;
    color: var(--primary);
    font-weight: 500
}
.learn-more:hover { gap: 10px }

.partner-card {
    background: var(--light);
    border-radius: var(--radius-xl);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border)
}
.partner-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg) }
.partner-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--light)
}
.partner-card h4 { font-size: 1.1rem; margin-bottom: 8px; color: var(--dark) }
.partner-card p { font-size: 0.85rem; color: var(--text-light) }

.feature-card {
    background: var(--light);
    border-radius: var(--radius-xl);
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border)
}
.feature-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg) }
.feature-icon {
    width: 60px;
    height: 60px;
    background: #EFF6FF;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
    color: var(--primary)
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: 10px; color: var(--dark) }
.feature-card p { font-size: 0.9rem; color: var(--text-light); line-height: 1.7 }

.news-card {
    background: var(--light);
    border-radius: var(--radius-xl);
    padding: 25px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
    display: block
}
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg) }
.news-tag {
    display: inline-block;
    padding: 4px 10px;
    background: var(--success);
    color: var(--light);
    font-size: 0.75rem;
    border-radius: 4px;
    margin-bottom: 12px
}
.news-card h3 { font-size: 1.05rem; margin-bottom: 10px; color: var(--dark); line-height: 1.5 }
.news-card p { font-size: 0.85rem; color: var(--text-light); line-height: 1.6 }

/* ===== Page Header ===== */
.page-header {
    padding: 120px 0 60px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    text-align: center
}
.page-header h1 { font-size: 2.5rem; font-weight: 700; color: var(--light); margin-bottom: 10px }
.page-header p { font-size: 1.1rem; color: rgba(255, 255, 255, 0.9) }

.breadcrumb {
    background: var(--light);
    padding: 15px 0;
    border-bottom: 1px solid var(--border)
}
.breadcrumb-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.9rem;
    color: var(--text-light)
}
.breadcrumb a:hover { color: var(--primary) }

/* ===== Detail Pages ===== */
.detail-section {
    padding: 60px 0;
    border-bottom: 1px solid var(--border)
}
.detail-section:nth-child(even) { background: #F8FAFC }
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center
}
.detail-content h2 { font-size: 1.8rem; margin-bottom: 15px; color: var(--dark) }
.detail-content p { color: var(--text-light); line-height: 1.8; margin-bottom: 20px }
.detail-features { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-bottom: 25px }
.detail-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--text)
}
.detail-feature i { color: var(--success) }
.detail-image img { width: 100%; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg) }

/* ===== Contact Page ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px }
.contact-info-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--light);
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border)
}
.contact-info-item i {
    width: 50px;
    height: 50px;
    background: var(--primary);
    color: var(--light);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0
}
.contact-info-item h4 { font-size: 1rem; margin-bottom: 5px; color: var(--dark) }
.contact-info-item p { font-size: 0.9rem; color: var(--text-light) }

.contact-form {
    background: var(--light);
    padding: 40px;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border)
}
.form-group { margin-bottom: 20px }
.form-group label { display: block; font-size: 0.9rem; margin-bottom: 8px; color: var(--dark); font-weight: 500 }
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition)
}
.form-group input:focus,
.form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1) }
.form-group textarea { min-height: 120px; resize: vertical }

/* ===== CTA Section ===== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    text-align: center
}
.cta-section h2 { font-size: 2rem; color: var(--light); margin-bottom: 15px }
.cta-section p { font-size: 1.1rem; color: rgba(255, 255, 255, 0.9); margin-bottom: 30px }

/* ===== Footer ===== */
.footer {
    background: var(--dark);
    color: var(--light);
    padding: 60px 0 30px
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px
}
.footer-brand { display: flex; gap: 15px; margin-bottom: 20px }
.footer-brand img { width: 48px; height: 48px; border-radius: var(--radius) }
.footer-brand h4 { font-size: 1.1rem; margin-bottom: 5px }
.footer-brand p { font-size: 0.85rem; color: var(--muted) }
.footer p { font-size: 0.9rem; color: var(--muted); line-height: 1.7 }
.footer h4 { font-size: 1rem; margin-bottom: 20px }
.footer-links li { margin-bottom: 12px }
.footer-links a { font-size: 0.9rem; color: var(--muted); transition: var(--transition) }
.footer-links a:hover { color: var(--light); padding-left: 5px }
.footer-links i { margin-right: 8px; color: var(--primary) }
.footer-social { display: flex; gap: 10px }
.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--light);
    transition: var(--transition)
}
.footer-social a:hover { background: var(--primary) }
.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    font-size: 0.85rem;
    color: var(--muted)
}

/* ===== News Page ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.news-card {
    background: var(--light);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition)
}
.news-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg) }
.news-image { position: relative; height: 200px; overflow: hidden }
.news-image img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition) }
.news-card:hover .news-image img { transform: scale(1.1) }
.news-date {
    position: absolute;
    bottom: 10px;
    right: 10px;
    padding: 5px 12px;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--light)
}
.news-content { padding: 20px }
.news-content h3 { font-size: 1.1rem; color: var(--dark); margin-bottom: 10px; line-height: 1.4 }
.news-content p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 15px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden }
.news-link { color: var(--primary); font-size: 0.9rem; font-weight: 500; display: inline-flex; align-items: center; gap: 5px }
.news-link:hover { gap: 10px }

/* ===== Credentials Page ===== */
.cred-card {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 35px 25px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow)
}
.cred-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg) }
.cred-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.8rem;
    color: var(--light)
}
.cred-card h3 { font-size: 1.1rem; color: var(--dark); margin-bottom: 10px }
.cred-card p { font-size: 0.9rem; color: var(--text-light); margin-bottom: 15px }

.honor-card {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 25px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow)
}
.honor-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg) }
.honor-year {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    opacity: 0.2;
    margin-bottom: 10px
}
.honor-card h3 { font-size: 1rem; color: var(--dark); margin-bottom: 8px }
.honor-card p { font-size: 0.85rem; color: var(--text-light) }

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px
}
.cert-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    aspect-ratio: 4/3;
    background: var(--bg-light)
}
.cert-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition)
}
.cert-item:hover img { transform: scale(1.05) }
.cert-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition)
}
.cert-item:hover .cert-overlay { opacity: 1 }
.cert-overlay i { font-size: 2rem; color: var(--light) }
.cert-item span {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 12px;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: var(--light);
    font-size: 0.85rem;
    text-align: center
}
.cert-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--muted)
}
.cert-placeholder i { font-size: 3rem; margin-bottom: 15px; color: var(--border) }
.cert-placeholder p { font-size: 0.85rem }

/* ===== Homepage Credentials Mini Cards ===== */
.cred-mini-card {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 25px 20px;
    text-align: center;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow)
}
.cred-mini-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary)
}
.cred-mini-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
    font-size: 1.5rem;
    color: var(--light)
}
.cred-mini-card h4 {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 8px
}
.cred-mini-card p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin: 0
}

/* ===== About Preview Section ===== */
.about-preview-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}
.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #EFF6FF;
    color: var(--primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
}
.about-preview-left .section-title {
    font-size: 2.2rem;
    color: var(--dark);
    margin-bottom: 20px;
    line-height: 1.3;
}
.about-preview-text {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 25px;
}
.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}
.about-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    color: var(--text);
}
.about-feature-item i {
    color: var(--success);
    font-size: 1.1rem;
}
.about-preview-right {
    background: linear-gradient(135deg, #EFF6FF 0%, #F0F9FF 100%);
    border-radius: var(--radius-xl);
    padding: 40px;
}
.about-stats-mini {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}
.about-stat-item {
    text-align: center;
}
.about-stat-num {
    display: block;
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
}
.about-stat-label {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* ===== News Grid 3 ===== */
.news-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}
.news-card {
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    box-shadow: var(--shadow);
}
.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}
.news-card-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    transition: var(--transition);
}
.news-card:hover .news-card-img {
    transform: scale(1.05);
}
.news-card-content {
    padding: 20px;
}
.news-card-date {
    font-size: 0.8rem;
    color: var(--muted);
    margin-bottom: 8px;
    display: block;
}
.news-card-title {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 10px;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.news-card-excerpt {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr) }
    .footer-grid { grid-template-columns: repeat(2, 1fr) }
    .cert-grid { grid-template-columns: repeat(2, 1fr) }
    .news-grid { grid-template-columns: repeat(2, 1fr) }
    .about-preview-grid { grid-template-columns: 1fr; gap: 40px }
}
@media (max-width: 768px) {
    .nav { display: none }
    .menu-btn { display: flex; flex-direction: column; gap: 5px; padding: 10px; cursor: pointer }
    .menu-btn span { display: block; width: 22px; height: 2px; background: var(--dark); border-radius: 2px }
    .hero-inner { grid-template-columns: 1fr; text-align: center }
    .hero-btns { justify-content: center }
    .hero-stats { justify-content: center; flex-wrap: wrap; gap: 30px }
    .hero-visual { display: none }
    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr }
    .contact-grid { grid-template-columns: 1fr }
    .detail-grid { grid-template-columns: 1fr }
    .cert-grid { grid-template-columns: 1fr }
    .news-grid { grid-template-columns: 1fr }
    .footer-grid { grid-template-columns: 1fr; text-align: center }
    .footer-brand { justify-content: center }
    .footer-social { justify-content: center }
    .about-preview-left .section-title { font-size: 1.8rem }
    .about-features { grid-template-columns: 1fr }
    .about-stats-mini { grid-template-columns: repeat(2, 1fr); gap: 20px }

    /* Hero优化 */
    .hero { padding: 100px 0 60px }
    .hero h1 { font-size: 2rem }
    .hero-badge { font-size: 0.75rem; padding: 6px 12px }
    .hero-desc { font-size: 0.95rem }
    .stat-num { font-size: 2rem }
    .stat-label { font-size: 0.9rem }

    /* Section优化 */
    .section { padding: 60px 0 }
    .section-title { font-size: 1.6rem }
    .section-subtitle { font-size: 0.9rem }

    /* Cards优化 */
    .case-card, .product-card, .partner-card, .news-card { margin-bottom: 15px }
    .case-content h3, .news-card-title { font-size: 1rem }

    /* CTA优化 */
    .cta-section { padding: 50px 20px }
    .cta-section h2 { font-size: 1.5rem }
    .cta-section p { font-size: 0.9rem }

    /* Footer优化 */
    .footer { padding: 40px 0 }
    .footer h4 { font-size: 1rem }
    .footer-links li { margin-bottom: 8px }
}