/* ========== CSS Variables ========== */
:root {
    --primary: #1a56db;
    --primary-dark: #1040a0;
    --primary-light: #3b82f6;
    --secondary: #0ea5e9;
    --accent: #06b6d4;
    --dark: #1e293b;
    --dark-light: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --light: #f1f5f9;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.12);
    --radius: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--dark);
    line-height: 1.7;
    background: var(--white);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

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

/* ========== Section Header ========== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.2rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--gradient);
    margin: 0 auto 16px;
    border-radius: 2px;
}

.section-subtitle {
    color: var(--gray);
    font-size: 1.1rem;
}

/* ========== Buttons ========== */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(26, 86, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(26, 86, 219, 0.4);
}

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

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

.btn-block {
    width: 100%;
}

/* ========== Header ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: 0 2px 30px rgba(0, 0, 0, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 12px;
    padding-bottom: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

a.logo {
    color: inherit;
}

.logo-icon {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.logo-text h1 {
    font-size: 1.3rem;
    color: var(--dark);
    line-height: 1.2;
}

.logo-text span {
    font-size: 0.75rem;
    color: var(--gray);
    letter-spacing: 1px;
}

.nav ul {
    display: flex;
    gap: 32px;
}

.nav a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--dark-light);
    position: relative;
    padding: 4px 0;
}

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

.nav a:hover::after,
.nav a.active::after {
    width: 100%;
}

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

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

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark);
    transition: var(--transition);
    border-radius: 2px;
}

/* ========== Hero ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 120px 20px 60px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a56db 100%);
    z-index: 0;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 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='0.03'%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-bg::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    color: var(--white);
}

.hero-content h2 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-stats {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 60px;
    flex-wrap: wrap;
}

.stat-item {
    text-align: center;
    color: var(--white);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-suffix {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-item p {
    font-size: 0.95rem;
    opacity: 0.8;
    margin-top: 4px;
}

/* ========== About ========== */
.about {
    padding: 100px 0;
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h3 {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--gray);
    margin-bottom: 16px;
    font-size: 1rem;
}

.about-text strong {
    color: var(--dark);
}

.about-list {
    margin-top: 24px;
}

.about-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 1rem;
    color: var(--dark-light);
}

.about-list li i {
    color: var(--primary);
    font-size: 1.1rem;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 100%;
    max-width: 450px;
    aspect-ratio: 4/3;
    background: var(--gradient);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.image-placeholder i {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.9;
}

.image-placeholder span {
    font-size: 1.1rem;
    font-weight: 600;
}

/* ========== Services ========== */
.services {
    padding: 100px 0;
    background: var(--light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    display: block;
    color: inherit;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

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

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card.featured {
    border: 2px solid var(--primary-light);
}

.featured-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    background: var(--gradient);
    color: var(--white);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
}

.service-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, rgba(26, 86, 219, 0.1) 0%, rgba(14, 165, 233, 0.1) 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
}

.service-icon i {
    font-size: 1.6rem;
    color: var(--primary);
}

.service-card h3 {
    font-size: 1.25rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.service-card p {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 20px;
}

.service-features {
    margin-top: 16px;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    font-size: 0.9rem;
    color: var(--dark-light);
}

.service-features li::before {
    content: '✓';
    color: var(--primary);
    font-weight: 700;
    font-size: 0.85rem;
}

/* ========== Advantages ========== */
.advantages {
    padding: 100px 0;
    background: var(--white);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-item {
    text-align: center;
    padding: 40px 30px;
    border-radius: var(--radius);
    transition: var(--transition);
    background: var(--white);
    border: 1px solid var(--light);
}

.advantage-item:hover {
    box-shadow: var(--shadow-lg);
    border-color: transparent;
    transform: translateY(-4px);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
}

.advantage-icon i {
    font-size: 1.6rem;
    color: var(--white);
}

.advantage-item h3 {
    font-size: 1.15rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.advantage-item p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* ========== Cases ========== */
.cases {
    padding: 100px 0;
    background: var(--light);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.case-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 36px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-industry {
    display: inline-block;
    background: linear-gradient(135deg, rgba(26, 86, 219, 0.1) 0%, rgba(14, 165, 233, 0.1) 100%);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 16px;
}

.case-card h3 {
    font-size: 1.2rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.case-card p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 20px;
    line-height: 1.7;
}

.case-result {
    display: flex;
    gap: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--light);
}

.case-result span {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.case-result span i.fa-arrow-down {
    color: #10b981;
}

/* ========== Partners ========== */
.partners {
    padding: 80px 0;
    background: var(--white);
}

.partners-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 40px;
}

.partner-logo {
    width: 140px;
    height: 70px;
    background: var(--light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--gray-light);
    transition: var(--transition);
}

.partner-logo:hover {
    background: var(--gradient);
    color: var(--white);
    transform: scale(1.05);
}

/* ========== Contact ========== */
.contact {
    padding: 100px 0;
    background: var(--light);
}

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

.contact-item {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
}

.contact-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    background: var(--gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
}

.contact-item h4 {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-item p {
    color: var(--gray);
    font-size: 0.95rem;
}

.contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-form h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
    color: var(--dark);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* ========== Footer ========== */
.footer {
    background: var(--dark);
    color: var(--gray-light);
    padding: 60px 0 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--dark-light);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}

.footer-logo img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.footer-logo span {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--white);
}

.footer-about p {
    font-size: 0.9rem;
    line-height: 1.7;
}

.footer-links h4,
.footer-services h4,
.footer-contact h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
}

.footer-links ul li,
.footer-services ul li {
    margin-bottom: 10px;
}

.footer-links a,
.footer-services a {
    color: var(--gray-light);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-links a:hover,
.footer-services a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.footer-contact i {
    color: var(--accent);
    width: 16px;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 0.85rem;
}

.footer-bottom a {
    color: var(--gray-light);
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--gradient);
    color: var(--white);
    border: none;
    border-radius: 50%;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
}

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

.animate__fadeInUp {
    animation: fadeInUp 0.8s ease forwards;
}

.animate__delay-1 {
    animation-delay: 0.2s;
    opacity: 0;
}

.animate__delay-2 {
    animation-delay: 0.4s;
    opacity: 0;
}

/* ========== Utility ========== */
.section-padding { padding: 100px 0; }
.bg-light { background: var(--light); }
.text-center { text-align: center; }
.mt-40 { margin-top: 40px; }

/* ========== Page Hero ========== */
.page-hero {
    position: relative;
    padding: 160px 0 80px;
    text-align: center;
    color: var(--white);
}

.page-hero-bg {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a56db 100%);
    z-index: 0;
}

.page-hero-bg::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: 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='0.03'%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");
}

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

.page-hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.breadcrumb {
    font-size: 0.95rem;
    opacity: 0.8;
}

.breadcrumb a {
    color: var(--accent);
}

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

/* ========== CTA Section ========== */
.cta-section {
    padding: 80px 0;
    background: var(--gradient);
    text-align: center;
    color: var(--white);
}

.cta-section h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.cta-section p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 28px;
}

.btn-white {
    display: inline-block;
    padding: 14px 36px;
    background: var(--white);
    color: var(--primary);
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: var(--transition);
    text-decoration: none;
}

.btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(0,0,0,0.2);
}

/* ========== About Detail ========== */
.about-detail {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.about-detail-text h2 {
    font-size: 1.8rem;
    color: var(--dark);
    margin-bottom: 20px;
}

.about-detail-text .lead {
    font-size: 1.1rem;
    color: var(--dark-light);
    margin-bottom: 16px;
    line-height: 1.8;
}

.about-detail-text p {
    color: var(--gray);
    margin-bottom: 12px;
}

.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 24px;
}

.highlight-item {
    display: flex;
    gap: 16px;
    align-items: center;
    padding: 16px;
    background: var(--light);
    border-radius: 12px;
}

.highlight-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
}

.highlight-item h4 {
    font-size: 0.85rem;
    color: var(--gray);
    margin-bottom: 4px;
}

.highlight-item p {
    font-size: 0.95rem;
    color: var(--dark);
    font-weight: 600;
}

.about-detail-image .image-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--gradient);
    border-radius: var(--radius);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.about-detail-image .image-placeholder i {
    font-size: 3rem;
    margin-bottom: 12px;
    opacity: 0.9;
}

.about-detail-image .image-placeholder span {
    font-size: 1rem;
    font-weight: 600;
}

/* ========== Culture ========== */
.culture-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.culture-card {
    text-align: center;
    padding: 36px 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.culture-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.culture-icon {
    width: 64px;
    height: 64px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 1.4rem;
}

.culture-card h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.culture-card p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ========== Timeline ========== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--light);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    padding: 20px 0;
}

.timeline-dot {
    position: absolute;
    left: 50%;
    top: 28px;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    transform: translateX(-50%);
    border: 3px solid var(--white);
    box-shadow: 0 0 0 3px var(--primary);
    z-index: 1;
}

.timeline-content {
    width: 45%;
    padding: 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.timeline-content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-left: auto;
}

.timeline-year {
    display: inline-block;
    background: var(--gradient);
    color: var(--white);
    font-size: 0.85rem;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 20px;
    margin-bottom: 12px;
}

.timeline-content h3 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ========== Certs ========== */
.certs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.cert-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.cert-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--white);
    font-size: 1.3rem;
}

.cert-card h4 {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.cert-card p {
    color: var(--gray);
    font-size: 0.85rem;
}

/* ========== Team ========== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.team-card {
    text-align: center;
    padding: 40px 24px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.team-avatar {
    width: 100px;
    height: 100px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--white);
    font-size: 2.5rem;
}

.team-card h4 {
    font-size: 1.1rem;
    color: var(--dark);
    margin-bottom: 4px;
}

.team-title {
    display: block;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.team-card p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ========== Service Detail ========== */
.service-detail-content {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 40px;
    align-items: start;
}

.service-detail-content.reverse {
    direction: rtl;
}

.service-detail-content.reverse > * {
    direction: ltr;
}

.service-detail-icon {
    width: 120px;
    height: 120px;
    background: var(--gradient);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.service-detail-text h2 {
    font-size: 1.8rem;
    color: var(--dark);
    margin-bottom: 16px;
}

.service-detail-text .lead {
    font-size: 1.05rem;
    color: var(--dark-light);
    margin-bottom: 24px;
    line-height: 1.8;
}

.service-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.detail-feature {
    padding: 24px;
    background: var(--light);
    border-radius: var(--radius);
    transition: var(--transition);
}

.detail-feature:hover {
    box-shadow: var(--shadow);
}

.detail-feature h4 {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.detail-feature h4 i {
    color: var(--primary);
}

.detail-feature p {
    color: var(--gray);
    font-size: 0.9rem;
}

/* ========== Advantage Detail ========== */
.advantage-detail-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 40px;
    align-items: start;
    padding: 40px 0;
    border-bottom: 1px solid var(--light);
}

.advantage-detail-item:last-child {
    border-bottom: none;
}

.advantage-detail-item.reverse {
    direction: rtl;
}

.advantage-detail-item.reverse > * {
    direction: ltr;
}

.advantage-detail-icon {
    width: 120px;
    height: 120px;
    background: var(--gradient);
    border-radius: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2.5rem;
    box-shadow: var(--shadow-lg);
}

.advantage-detail-text h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 10px;
}

.advantage-detail-text .lead {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 12px;
}

.advantage-detail-text p {
    color: var(--gray);
    margin-bottom: 16px;
}

.advantage-list {
    margin-top: 16px;
}

.advantage-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    color: var(--dark-light);
    font-size: 0.95rem;
}

.advantage-list li i {
    color: var(--primary);
}

.response-metrics {
    display: flex;
    gap: 24px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.metric {
    flex: 1;
    min-width: 120px;
    text-align: center;
    padding: 20px 16px;
    background: var(--light);
    border-radius: 12px;
}

.metric-value {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.metric-label {
    font-size: 0.85rem;
    color: var(--gray);
}

/* ========== Case Detail ========== */
.case-detail-card {
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 40px;
    overflow: hidden;
}

.case-detail-header {
    padding: 24px 32px;
    background: var(--gradient);
    color: var(--white);
}

.case-tag {
    display: inline-block;
    background: rgba(255,255,255,0.2);
    color: var(--white);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 8px;
}

.case-detail-header h3 {
    font-size: 1.3rem;
    margin: 0;
}

.case-detail-body {
    padding: 32px;
}

.case-detail-info {
    display: flex;
    gap: 24px;
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.case-info-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: var(--dark-light);
}

.case-info-item i {
    color: var(--primary);
}

.case-detail-description h4 {
    font-size: 1.1rem;
    color: var(--dark);
    margin: 20px 0 10px;
}

.case-detail-description p {
    color: var(--gray);
    font-size: 0.95rem;
}

.case-metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 20px;
}

.case-metric {
    text-align: center;
    padding: 20px 16px;
    background: var(--light);
    border-radius: 12px;
}

.case-metric-value {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 6px;
}

.case-metric-label {
    font-size: 0.8rem;
    color: var(--gray);
}

/* ========== Industry Stats ========== */
.industry-stats {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

.industry-stat {
    text-align: center;
    padding: 28px 16px;
    background: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.industry-stat:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.industry-icon {
    width: 56px;
    height: 56px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    color: var(--white);
    font-size: 1.2rem;
}

.industry-stat h4 {
    font-size: 0.95rem;
    color: var(--dark);
    margin-bottom: 6px;
}

.industry-stat p {
    font-size: 0.85rem;
    color: var(--gray);
}

/* ========== Contact Page ========== */
.contact-page-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-page-info h2 {
    font-size: 1.8rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.contact-page-info .lead {
    color: var(--gray);
    margin-bottom: 32px;
}

.contact-detail-item {
    display: flex;
    gap: 20px;
    margin-bottom: 24px;
}

.contact-detail-icon {
    width: 52px;
    height: 52px;
    min-width: 52px;
    background: var(--gradient);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
}

.contact-detail-item h4 {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 4px;
}

.contact-detail-item p {
    color: var(--gray);
    font-size: 0.95rem;
}

.contact-detail-item a {
    color: var(--primary);
}

.contact-detail-item a:hover {
    text-decoration: underline;
}

.contact-social h4 {
    font-size: 1rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.social-links {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 44px;
    height: 44px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.1rem;
    transition: var(--transition);
}

.social-link:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.contact-page-form {
    background: var(--white);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-page-form h3 {
    font-size: 1.3rem;
    color: var(--dark);
    margin-bottom: 8px;
}

.contact-page-form > p {
    color: var(--gray);
    font-size: 0.9rem;
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--dark);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
    color: var(--dark);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-note {
    text-align: center;
    font-size: 0.85rem;
    color: var(--gray);
    margin-top: 12px;
}

.form-note i {
    color: var(--primary);
    margin-right: 4px;
}

/* ========== FAQ ========== */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border-radius: var(--radius);
    margin-bottom: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--light);
}

.faq-question h4 {
    font-size: 1rem;
    color: var(--dark);
    font-weight: 600;
}

.faq-question i {
    color: var(--gray);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--gray);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ========== Map ========== */
.map-section {
    padding: 0;
}

.map-placeholder {
    width: 100%;
    height: 400px;
    background: var(--light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--gray);
}

.map-placeholder i {
    font-size: 3rem;
    margin-bottom: 12px;
    color: var(--primary);
}

.map-placeholder p {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--dark);
}

.map-placeholder span {
    font-size: 0.85rem;
    margin-top: 6px;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .services-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

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

    .industry-stats {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .service-detail-content,
    .advantage-detail-item {
        grid-template-columns: 100px 1fr;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav {
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: var(--white);
        padding: 20px;
        box-shadow: var(--shadow);
        transform: translateY(-120%);
        transition: var(--transition);
    }

    .nav.active {
        transform: translateY(0);
    }

    .nav ul {
        flex-direction: column;
        gap: 16px;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .hero-stats {
        gap: 30px;
    }

    .about-content,
    .contact-content,
    .about-detail,
    .contact-page-grid,
    .service-detail-content,
    .service-detail-content.reverse,
    .advantage-detail-item,
    .advantage-detail-item.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
    }

    .service-detail-icon,
    .advantage-detail-icon {
        width: 80px;
        height: 80px;
        font-size: 1.8rem;
        border-radius: 16px;
    }

    .services-grid,
    .advantages-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

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

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

    .service-detail-grid {
        grid-template-columns: 1fr;
    }

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

    .industry-stats {
        grid-template-columns: repeat(3, 1fr);
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-dot {
        left: 20px;
    }

    .timeline-content {
        width: calc(100% - 60px);
        margin-left: 60px !important;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .about-highlights {
        grid-template-columns: 1fr;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }
}

/* ========== 表单成功弹窗 ========== */
#formSuccessOverlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

#formSuccessOverlay.active {
    opacity: 1;
    visibility: visible;
}

.form-success-card {
    background: var(--white);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    max-width: 420px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

#formSuccessOverlay.active .form-success-card {
    transform: scale(1);
}

.form-success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
}

.success-checkmark {
    width: 80px;
    height: 80px;
}

.checkmark-check {
    stroke-dasharray: 48;
    stroke-dashoffset: 48;
    animation: draw-check 0.5s ease 0.3s forwards;
}

@keyframes draw-check {
    to { stroke-dashoffset: 0; }
}

.form-success-card h3 {
    font-size: 1.5rem;
    color: var(--dark);
    margin-bottom: 12px;
}

.form-success-card p {
    color: var(--gray);
    margin-bottom: 24px;
    line-height: 1.6;
}

/* ========== 按钮加载态 ========== */
.btn:disabled {
    cursor: not-allowed;
    opacity: 0.7;
}