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

:root {
    --primary-color: #1a1a2e;
    --accent-color: #16213e;
    --highlight-color: #0f3460;
    --text-dark: #333;
    --text-light: #666;
    --white: #ffffff;
    --gray-bg: #f5f7fa;
    --border-color: #e1e8ed;
    --success-color: #28a745;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
    color: var(--text-dark);
    line-height: 1.6;
    background: var(--white);
}

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

header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    z-index: 1000;
    transition: all 0.3s ease;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--primary-color);
}

.logo-icon {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--primary-color);
}

.logo-en {
    font-size: 11px;
    color: var(--text-light);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

nav {
    display: flex;
    align-items: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav-menu a {
    display: block;
    padding: 10px 20px;
    text-decoration: none;
    color: var(--text-dark);
    font-size: 15px;
    font-weight: 500;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--white);
    background: var(--primary-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 26px;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--highlight-color) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
    padding-top: 72px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 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 .container {
    position: relative;
    z-index: 1;
}

.hero-content {
    max-width: 720px;
}

.hero h1 {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero h1 span {
    display: block;
    color: #64b5f6;
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.8;
    margin-bottom: 36px;
    color: rgba(255, 255, 255, 0.85);
}

.btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--white);
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.4);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--white);
}

.section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.section-title p {
    font-size: 16px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.services {
    background: var(--gray-bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--highlight-color);
}

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--highlight-color));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: var(--white);
}

.service-icon svg {
    width: 32px;
    height: 32px;
}

.service-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--text-light);
    font-size: 15px;
    line-height: 1.7;
}

.about-preview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-image {
    background: linear-gradient(135deg, var(--primary-color), var(--highlight-color));
    border-radius: 16px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.about-image::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 50%;
}

.about-image .logo-large {
    position: relative;
    z-index: 1;
    text-align: center;
}

.about-image .logo-large svg {
    width: 120px;
    height: 120px;
}

.about-image .logo-large .big-text {
    font-size: 28px;
    font-weight: 700;
    margin-top: 20px;
    letter-spacing: 4px;
}

.about-content h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.about-content p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

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

.stat-number {
    font-size: 42px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 8px;
}

.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--highlight-color) 100%);
    color: var(--white);
    padding: 150px 0 80px;
    text-align: center;
}

.page-header h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

.about-content-full h2 {
    font-size: 28px;
    color: var(--primary-color);
    margin-bottom: 20px;
    font-weight: 700;
}

.about-content-full p {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-content-full h3 {
    font-size: 20px;
    color: var(--primary-color);
    margin-top: 30px;
    margin-bottom: 16px;
}

.value-list {
    list-style: none;
}

.value-list li {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.value-list li:last-child {
    border-bottom: none;
}

.value-icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    background: var(--gray-bg);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--highlight-color);
}

.value-icon svg {
    width: 20px;
    height: 20px;
}

.value-text h4 {
    font-size: 16px;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.value-text p {
    font-size: 14px;
    color: var(--text-light);
    margin: 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.team-card:hover {
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

.team-avatar {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--highlight-color));
    margin: 0 auto 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 32px;
    font-weight: 600;
}

.team-card h4 {
    font-size: 18px;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.team-role {
    font-size: 14px;
    color: var(--text-light);
}

.services-detail {
    background: var(--gray-bg);
}

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

.services-detail-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.services-detail-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
}

.services-detail-img {
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--highlight-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.services-detail-img svg {
    width: 64px;
    height: 64px;
}

.services-detail-body {
    padding: 30px;
}

.services-detail-body h3 {
    font-size: 22px;
    color: var(--primary-color);
    margin-bottom: 12px;
}

.services-detail-body p {
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.7;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--text-dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.feature-list li::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--highlight-color);
    border-radius: 50%;
    flex-shrink: 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info h2 {
    font-size: 32px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.contact-info p {
    color: var(--text-light);
    margin-bottom: 30px;
    line-height: 1.8;
}

.contact-list {
    list-style: none;
}

.contact-list li {
    display: flex;
    gap: 16px;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    align-items: flex-start;
}

.contact-list li:last-child {
    border-bottom: none;
}

.contact-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--gray-bg);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--highlight-color);
}

.contact-icon svg {
    width: 22px;
    height: 22px;
}

.contact-label {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.contact-value {
    font-size: 16px;
    color: var(--primary-color);
    font-weight: 500;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--highlight-color);
    box-shadow: 0 0 0 3px rgba(15, 52, 96, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 140px;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-submit:hover {
    background: var(--highlight-color);
}

footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand h3 {
    font-size: 20px;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-brand p {
    font-size: 14px;
    opacity: 0.75;
    line-height: 1.8;
    margin-bottom: 16px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--white);
}

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

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

.footer-col ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-col ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
}

.copyright {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 12px;
}

.filing-info {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

.filing-info a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    transition: color 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.filing-info a:hover {
    color: var(--white);
}

.filing-icon {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.filing-icon svg {
    width: 14px;
    height: 14px;
}

@media (max-width: 900px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 4px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.3s ease;
    }

    .nav-menu.open {
        transform: translateY(0);
    }

    .nav-menu a {
        padding: 12px 20px;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .about-preview {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image {
        height: 300px;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

    .section {
        padding: 70px 0;
    }

    .section-title h2 {
        font-size: 28px;
    }
}

@media (max-width: 600px) {
    .hero h1 {
        font-size: 28px;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

    .stat-number {
        font-size: 32px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .filing-info {
        flex-direction: column;
        gap: 8px;
    }

    .page-header h1 {
        font-size: 32px;
    }
}