/* ==================== 导航栏 ==================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.navbar {
    padding: 1rem 0;
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.site-branding h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 700;
}

.site-branding h1 a {
    background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.primary-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

.primary-menu a {
    font-weight: 500;
    color: #0f172a;
    transition: color 0.3s ease;
}

.primary-menu a:hover {
    color: #7c3aed;
}

.navbar-cta {
    margin-left: auto;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #0f172a;
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ==================== Hero Section ==================== */
.hero-section {
    padding: 8rem 0;
    color: white;
    position: relative;
    overflow: hidden;
    min-height: 600px;
    display: flex;
    align-items: center;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 50%, #06b6d4 100%);
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    z-index: 0;
}

@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero-section .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.6s ease-out;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== Features Section ==================== */
.features-section,
.service-section,
.whatsapp-section,
.company-info-section,
.faq-section {
    padding: 6rem 0;
}

.features-section {
    background: rgba(248, 250, 252, 0.5);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: #64748b;
    margin-bottom: 3rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.07);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(30, 58, 138, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: #1e3a8a;
}

.feature-card p {
    color: #64748b;
    line-height: 1.6;
}

.view-more-btn {
    text-align: center;
}

/* ==================== Service Section ==================== */
.service-section {
    background: linear-gradient(to bottom, #f0f9ff, #f3e8ff);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.service-card h3 {
    color: #1e3a8a;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.service-card p {
    color: #64748b;
    line-height: 1.6;
}

/* ==================== WhatsApp Section ==================== */
.whatsapp-section {
    background: rgba(248, 250, 252, 0.5);
}

.whatsapp-features h3 {
    font-size: 1.5rem;
    color: #1e3a8a;
    margin-bottom: 1.5rem;
}

.whatsapp-features ul {
    list-style: none;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.whatsapp-features li {
    background: white;
    padding: 1.5rem;
    border-radius: 0.75rem;
    border-left: 4px solid #7c3aed;
    color: #64748b;
    line-height: 1.6;
}

/* ==================== Company Info Section ==================== */
.company-info-section {
    background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
    color: white;
}

.company-info-section .section-title {
    color: white;
    -webkit-text-fill-color: white;
}

.company-info-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.stat-card {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 1rem;
    backdrop-filter: blur(10px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 1rem;
    opacity: 0.9;
}

/* ==================== FAQ Section ==================== */
.faq-section {
    background: rgba(248, 250, 252, 0.5);
}

.faq-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.faq-item {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.faq-item h3 {
    color: #1e3a8a;
    margin-bottom: 1rem;
    font-size: 1.125rem;
}

.faq-item p {
    color: #64748b;
    line-height: 1.6;
}

/* ==================== Contact Section ==================== */
.contact-section {
    background: linear-gradient(135deg, #1e3a8a 0%, #7c3aed 100%);
    color: white;
    padding: 6rem 0;
}

.contact-section .section-title {
    color: white;
    -webkit-text-fill-color: white;
}

.contact-section .section-subtitle {
    color: rgba(255, 255, 255, 0.9);
}

.contact-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.contact-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    color: white;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-card:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.contact-card p {
    opacity: 0.9;
    margin-bottom: 1rem;
}

.contact-link {
    font-weight: 600;
    font-size: 1.125rem;
}

.contact-tagline {
    text-align: center;
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: 2rem;
}

/* ==================== Footer ==================== */
.site-footer {
    background: #0f172a;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-col h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.social-links a {
    color: #06b6d4;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #7c3aed;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
    .primary-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .menu-toggle {
        display: flex;
    }

    .primary-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 1rem;
        display: none;
    }

    .primary-menu.active {
        display: flex;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .features-grid,
    .service-grid,
    .stats-grid,
    .faq-list,
    .contact-methods {
        grid-template-columns: 1fr;
    }
}