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

:root {
    --primary-color: #c41e3a;
    --secondary-color: #1a365d;
    --accent-color: #2d5a87;
    --bg-light: #f8fafc;
    --text-dark: #1e293b;
    --text-gray: #64748b;
    --white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background: var(--white);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.header.scrolled {
    box-shadow: var(--shadow-md);
}

.nav {
    padding: 1.2rem 0;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    font-size: 1.6rem;
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: -0.3px;
    display: inline-block;
    vertical-align: middle;
}

.logo img {
    vertical-align: middle;
    margin-right: 12px;
    max-height: 55px;
    border-radius: 8px;
    transition: transform 0.3s ease;
}

.logo img:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2.5rem;
    align-items: center;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    font-size: 0.98rem;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-menu a:hover {
    color: var(--primary-color);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    gap: 6px;
    padding: 8px;
    z-index: 1001;
}

.nav-toggle span {
    width: 28px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hero {
    margin-top: 80px;
    min-height: 700px;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2c4a6f 50%, var(--secondary-color) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 60%);
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    50% { transform: translate(30px, -30px) rotate(5deg); }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(26, 54, 93, 0.3) 0%, rgba(26, 54, 93, 0.6) 100%);
}

.hero-content {
    position: relative;
    text-align: center;
    color: white;
    z-index: 1;
    max-width: 900px;
    padding: 0 24px;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
    letter-spacing: -1px;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero-content p {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    font-weight: 400;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.btn-primary {
    display: inline-block;
    padding: 1.1rem 3rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, #e02442 100%);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.05rem;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: 0 6px 20px rgba(196, 30, 58, 0.35);
    letter-spacing: 0.3px;
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: 0 12px 35px rgba(196, 30, 58, 0.45);
}

.section {
    padding: 6rem 0;
    position: relative;
}

.section-alt {
    background: linear-gradient(180deg, var(--bg-light) 0%, #f1f5f9 100%);
}

.section-dark {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2c4a6f 100%);
    color: white;
}

.section-title {
    text-align: center;
    font-size: 2.7rem;
    margin-bottom: 1rem;
    font-weight: 700;
    color: var(--secondary-color);
    letter-spacing: -0.5px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #e02442);
    margin: 1.2rem auto 0;
    border-radius: 2px;
}

.section-dark .section-title {
    color: white;
}

.section-dark .section-title::after {
    background: linear-gradient(90deg, var(--primary-color), white);
}

.section-subtitle {
    text-align: center;
    font-size: 1.15rem;
    color: var(--text-gray);
    margin-bottom: 3.5rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

.about-content {
    margin-bottom: 3.5rem;
}

.about-text {
    font-size: 1.15rem;
    color: var(--text-gray);
    text-align: center;
    max-width: 950px;
    margin: 0 auto 3.5rem;
    line-height: 1.9;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-bottom: 4.5rem;
}

.stat-item {
    text-align: center;
    padding: 2.5rem 2rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), #e02442);
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.stat-item:hover::before {
    transform: scaleX(1);
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), #e02442);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-label {
    color: var(--text-gray);
    font-size: 1rem;
    font-weight: 500;
}

.core-strength h3,
.brand-story h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
    position: relative;
    padding-left: 20px;
}

.core-strength h3::before,
.brand-story h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary-color), #e02442);
    border-radius: 3px;
}

.core-strength p {
    font-size: 1.1rem;
    color: var(--text-gray);
    margin-bottom: 1.2rem;
    line-height: 1.9;
}

.quality-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-top: 3.5rem;
}

.highlight-item {
    text-align: center;
    padding: 2.5rem 2rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.highlight-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.03), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.highlight-item:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.highlight-item:hover::after {
    opacity: 1;
}

.highlight-icon {
    font-size: 3.5rem;
    margin-bottom: 1.2rem;
    display: inline-block;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.highlight-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 12px;
    margin-bottom: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.highlight-image:hover {
    transform: scale(1.05);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.highlight-item h4 {
    font-size: 1.25rem;
    margin-bottom: 0.8rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.highlight-item p {
    color: var(--text-gray);
    font-size: 1rem;
    line-height: 1.7;
}

.brand-story {
    margin-top: 4.5rem;
    padding: 3rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.brand-story::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 150px;
    height: 150px;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.08), transparent);
    border-radius: 0 var(--radius-md) 0 100%;
}

.brand-story p {
    color: var(--text-gray);
    line-height: 1.9;
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
    position: relative;
}

.mission-vision {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-top: 3.5rem;
}

.mv-card {
    padding: 2.5rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border-left: 5px solid var(--primary-color);
    transition: all 0.4s ease;
    position: relative;
}

.mv-card::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    padding: 1rem;
    font-size: 4rem;
    opacity: 0.05;
    font-weight: 800;
}

.mv-card:nth-child(1)::before { content: '使'; }
.mv-card:nth-child(2)::before { content: '愿'; }
.mv-card:nth-child(3)::before { content: '价'; }

.mv-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
    border-left-color: #e02442;
}

.mv-card h4 {
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
    color: var(--secondary-color);
    font-weight: 700;
}

.mv-card p,
.mv-card li {
    color: var(--text-gray);
    line-height: 1.9;
    font-size: 1.05rem;
}

.mv-card ul {
    list-style: none;
}

.mv-card li {
    margin-bottom: 0.8rem;
    padding-left: 1.5rem;
    position: relative;
}

.mv-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

.product-categories {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.product-category {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.product-category::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.category-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    display: inline-block;
    filter: drop-shadow(0 4px 10px rgba(0, 0, 0, 0.1));
}

.category-image {
    width: 100%;
    max-height: 400px;
    object-fit: cover;
    border-radius: 16px;
    margin-bottom: 2rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.category-image:hover {
    transform: scale(1.02);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

.product-category h3 {
    font-size: 1.9rem;
    margin-bottom: 1.8rem;
    color: var(--secondary-color);
    font-weight: 700;
}

.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 2rem;
}

.product-item {
    background: linear-gradient(135deg, var(--bg-light), #f1f5f9);
    padding: 1.8rem;
    border-radius: var(--radius-sm);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid transparent;
}

.product-item:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: rgba(196, 30, 58, 0.2);
    background: var(--white);
}

.product-image-placeholder {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e0 50%, #e2e8f0 100%);
    background-size: 200% 200%;
    animation: shimmer 2s ease-in-out infinite;
    border-radius: var(--radius-sm);
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94a3b8;
    font-size: 0.95rem;
    font-weight: 500;
}

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

.product-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.product-item p {
    color: var(--text-gray);
    font-size: 1rem;
    line-height: 1.7;
}

.service-coverage {
    margin-top: 4.5rem;
}

.service-coverage h3 {
    font-size: 2rem;
    margin-bottom: 2.5rem;
    color: var(--secondary-color);
    text-align: center;
    font-weight: 700;
}

.coverage-areas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.coverage-item {
    padding: 2.5rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all 0.4s ease;
    border-top: 4px solid var(--accent-color);
}

.coverage-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-top-color: var(--primary-color);
}

.coverage-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.coverage-item p {
    color: var(--text-gray);
    line-height: 1.9;
    font-size: 1.05rem;
}

.coverage-item .highlight {
    color: var(--primary-color);
    font-weight: 700;
    margin-top: 0.8rem;
    display: inline-block;
    background: rgba(196, 30, 58, 0.08);
    padding: 0.4rem 1rem;
    border-radius: 50px;
    font-size: 0.95rem;
}

.service-modes h4 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
    text-align: center;
    font-weight: 600;
}

.mode-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

.tag {
    padding: 0.7rem 1.8rem;
    background: linear-gradient(135deg, var(--primary-color), #e02442);
    color: white;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.25);
}

.tag:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(196, 30, 58, 0.35);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 4.5rem;
}

.scenario-card {
    padding: 2.5rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    border-top: 5px solid var(--primary-color);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    position: relative;
    overflow: hidden;
}

.scenario-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(196, 30, 58, 0.05), transparent);
    transform: rotate(45deg);
    transition: all 0.4s ease;
}

.scenario-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.scenario-card:hover::after {
    top: -30%;
    right: -30%;
}

.scenario-icon {
    font-size: 3.5rem;
    margin-bottom: 1.2rem;
    display: inline-block;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.scenario-card h3 {
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.scenario-card p {
    color: var(--text-gray);
    line-height: 1.9;
    font-size: 1.05rem;
}

.target-customers h3 {
    font-size: 2rem;
    margin-bottom: 2.5rem;
    color: var(--secondary-color);
    text-align: center;
    font-weight: 700;
}

.customer-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.customer-item {
    display: flex;
    align-items: flex-start;
    gap: 1.8rem;
    padding: 2.2rem;
    background: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all 0.4s ease;
    border-left: 4px solid var(--accent-color);
}

.customer-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
    border-left-color: var(--primary-color);
}

.customer-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), #e02442);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 70px;
    line-height: 1;
}

.customer-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.6rem;
    color: var(--secondary-color);
    font-weight: 600;
}

.customer-item p {
    color: var(--text-gray);
    line-height: 1.8;
    font-size: 1.05rem;
}

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
    gap: 3.5rem;
}

.contact-info h3 {
    font-size: 2rem;
    margin-bottom: 2.5rem;
    font-weight: 700;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
    margin-bottom: 2.2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateX(6px);
}

.contact-icon {
    font-size: 2.5rem;
    min-width: 60px;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.2));
}

.contact-item h4 {
    font-size: 1.3rem;
    margin-bottom: 0.6rem;
    font-weight: 600;
}

.contact-item p {
    opacity: 0.92;
    font-size: 1.05rem;
    line-height: 1.7;
}

.contact-form-placeholder {
    padding: 3.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    border: 2px dashed rgba(255, 255, 255, 0.2);
}

.contact-form-placeholder p {
    font-size: 1.15rem;
    opacity: 0.9;
}

.footer {
    background: linear-gradient(135deg, #0d1b2a 0%, #1a2d42 100%);
    color: white;
    text-align: center;
    padding: 2.5rem 0;
}

.footer p {
    opacity: 0.85;
    font-size: 1rem;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1.5rem;
        box-shadow: var(--shadow-md);
        gap: 1rem;
    }

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

    .nav-toggle {
        display: flex;
    }

    .hero-content h2 {
        font-size: 2.2rem;
    }

    .hero-content p {
        font-size: 1.15rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .customer-item {
        flex-direction: column;
        gap: 0.8rem;
    }

    .container {
        padding: 0 16px;
    }
}