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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f7fa;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 26px;
    color: #2563eb;
    font-weight: 700;
}

.logo .tagline {
    font-size: 12px;
    color: #666;
    margin-left: 10px;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav a {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s;
}

.nav a:hover,
.nav a.active {
    color: #2563eb;
}

.hero {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: #fff;
    padding: 80px 0;
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 60px;
}

.hero-content {
    flex: 1;
}

.hero-title {
    font-size: 44px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 17px;
    margin-bottom: 30px;
    opacity: 0.92;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s;
}

.btn-primary {
    background: #fff;
    color: #2563eb;
}

.btn-primary:hover {
    background: #eff6ff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
}

.btn-large {
    padding: 18px 44px;
    font-size: 18px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 700;
}

.stat-label {
    font-size: 13px;
    opacity: 0.85;
}

.hero-image {
    flex: 0 0 360px;
}

.zip-demo {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 16px;
    padding: 30px;
    backdrop-filter: blur(6px);
}

.zip-box {
    text-align: center;
}

.zip-item {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 10px;
    padding: 18px 12px;
    margin-bottom: 14px;
}

.zip-icon {
    font-size: 34px;
    display: block;
    margin-bottom: 6px;
}

.zip-name {
    display: block;
    font-size: 14px;
    opacity: 0.9;
}

.zip-speed {
    display: block;
    font-size: 20px;
    font-weight: 700;
    margin-top: 4px;
}

.zip-arrow {
    font-size: 26px;
    opacity: 0.8;
    margin-bottom: 14px;
}

.section {
    padding: 80px 0;
}

.section-white {
    background: #fff;
}

.section-title {
    font-size: 34px;
    font-weight: 700;
    text-align: center;
    color: #1f2937;
    margin-bottom: 15px;
}

.section-subtitle {
    text-align: center;
    color: #6b7280;
    font-size: 16px;
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background: #fff;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    font-size: 40px;
    margin-bottom: 18px;
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 12px;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.7;
    font-size: 15px;
}

.cta-section {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: #fff;
    padding: 70px 0;
    text-align: center;
}

.cta-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
}

.cta-subtitle {
    font-size: 16px;
    opacity: 0.9;
    margin-bottom: 30px;
}

.cta-section .btn-primary {
    background: #fbbf24;
    color: #1e3a8a;
}

.cta-section .btn-primary:hover {
    background: #f59e0b;
}

.footer {
    background: #1e293b;
    color: #94a3b8;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: #fff;
    font-size: 17px;
    margin-bottom: 18px;
}

.footer-section p {
    font-size: 14px;
    line-height: 1.8;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul a {
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s;
}

.footer-section ul a:hover {
    color: #60a5fa;
}

.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 25px;
    text-align: center;
    font-size: 13px;
}

.footer-disclaimer {
    background: #0f172a;
    border-top: 1px solid #334155;
    color: #64748b;
    padding: 20px 0;
    font-size: 12px;
    line-height: 1.8;
}

.footer-disclaimer .container {
    max-width: 1100px;
}

.page-banner {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-banner h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 12px;
}

.page-banner p {
    font-size: 16px;
    opacity: 0.9;
}

.content-section {
    padding: 70px 0;
}

.content-block {
    background: #fff;
    border-radius: 12px;
    padding: 35px;
    margin-bottom: 30px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
}

.content-block h3 {
    font-size: 22px;
    color: #1f2937;
    margin-bottom: 18px;
    padding-left: 14px;
    border-left: 4px solid #2563eb;
}

.content-block h4 {
    font-size: 17px;
    color: #1f2937;
    margin: 20px 0 10px;
}

.content-block p {
    color: #4b5563;
    line-height: 1.9;
    margin-bottom: 14px;
    font-size: 15px;
}

.content-block ul,
.content-block ol {
    padding-left: 24px;
    color: #4b5563;
    line-height: 2;
    margin-bottom: 14px;
}

.content-block strong {
    color: #1f2937;
}

.info-box {
    background: #eff6ff;
    border-left: 4px solid #2563eb;
    padding: 20px;
    border-radius: 8px;
    margin: 30px 0;
}

.info-box.warning {
    background: #fef3c7;
    border-left-color: #d97706;
}

.info-box h4 {
    color: #1f2937;
    margin-bottom: 10px;
    font-size: 17px;
}

.info-box p {
    color: #6b7280;
    line-height: 1.8;
    margin: 0;
    font-size: 14px;
}

.breadcrumb {
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    padding: 14px 0;
    font-size: 13px;
    color: #6b7280;
}

.breadcrumb a {
    color: #2563eb;
    text-decoration: none;
}

.breadcrumb a:hover {
    text-decoration: underline;
}

@media (max-width: 900px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    .hero-buttons {
        justify-content: center;
    }
    .hero-stats {
        justify-content: center;
    }
    .hero-image {
        flex: 0 0 auto;
        width: 100%;
        max-width: 340px;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 12px;
    }
    .nav ul {
        gap: 16px;
        flex-wrap: wrap;
        justify-content: center;
    }
    .hero {
        padding: 50px 0;
    }
    .hero-title {
        font-size: 30px;
    }
    .section {
        padding: 50px 0;
    }
    .section-title {
        font-size: 26px;
    }
    .stat-number {
        font-size: 22px;
    }
    .content-block {
        padding: 22px;
    }
}