:root {
    --color-primary: #1A1A2E;
    --color-secondary: #16213E;
    --color-accent: #E94560;
    --color-auxiliary: #0F3460;
    --color-bg-light: #F8F9FA;
    --color-text: #2D3436;
    --color-text-light: #636E72;
    --color-white: #FFFFFF;
    --color-border: #E0E0E0;
    
    --font-cn: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-en: "Montserrat", sans-serif;
    
    --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 40px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.15);
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    
    --container-width: 1200px;
    --section-spacing: 120px;
    --header-height: 80px;
}

@media (max-width: 768px) {
    :root {
        --section-spacing: 80px;
        --header-height: 70px;
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-cn);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-white);
    overflow-x: hidden;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 30px;
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
}

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

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

ul {
    list-style: none;
}

.section {
    padding: var(--section-spacing) 0;
}

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

.section-tag {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 3px;
    color: var(--color-accent);
    margin-bottom: 15px;
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.section-desc {
    font-size: 18px;
    color: var(--color-text-light);
}

@media (max-width: 768px) {
    .section-title {
        font-size: 28px;
    }
    .section-desc {
        font-size: 16px;
    }
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    font-family: var(--font-cn);
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #d13a54;
    border-color: #d13a54;
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(233, 69, 96, 0.3);
}

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

.btn-outline:hover {
    background-color: var(--color-white);
    color: var(--color-primary);
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .btn {
        padding: 14px 24px;
        font-size: 15px;
    }
}

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: 2px;
}

.navbar.scrolled .logo-text {
    color: var(--color-primary);
}

.logo-en {
    font-family: var(--font-en);
    font-size: 10px;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.7);
}

.navbar.scrolled .logo-en {
    color: var(--color-text-light);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-link {
    font-size: 15px;
    font-weight: 500;
    color: var(--color-white);
    position: relative;
    padding: 8px 0;
}

.navbar.scrolled .nav-link {
    color: var(--color-text);
}

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

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

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-toggle span {
    display: block;
    width: 25px;
    height: 2px;
    background-color: var(--color-white);
    transition: var(--transition);
}

.navbar.scrolled .mobile-toggle span {
    background-color: var(--color-primary);
}

@media (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background-color: var(--color-white);
        flex-direction: column;
        padding: 40px 30px;
        gap: 25px;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        opacity: 0;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
    }
    
    .nav-link {
        color: var(--color-text) !important;
        font-size: 18px;
    }
    
    .mobile-toggle {
        display: flex;
    }
}

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 50%, var(--color-auxiliary) 100%);
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(233, 69, 96, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(15, 52, 96, 0.3) 0%, transparent 50%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 0 30px;
    max-width: 900px;
}

.hero-title {
    font-size: 64px;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.2;
    margin-bottom: 25px;
}

.title-line {
    display: block;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease forwards;
}

.title-line:nth-child(2) {
    animation-delay: 0.2s;
}

.hero-subtitle {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.4s forwards;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    opacity: 0;
    transform: translateY(30px);
    animation: fadeInUp 0.8s ease 0.6s forwards;
}

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

@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.6);
    font-size: 13px;
    opacity: 0;
    animation: fadeIn 1s ease 1s forwards;
}

.scroll-line {
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.6), transparent);
    animation: scrollPulse 2s ease infinite;
}

@keyframes fadeIn {
    to {
        opacity: 1;
    }
}

@keyframes scrollPulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.3;
    }
}

.about {
    background-color: var(--color-bg-light);
}

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

.about-image {
    position: relative;
}

.image-wrapper {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.image-wrapper img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    background-color: var(--color-primary);
}

.about-year {
    position: absolute;
    bottom: -30px;
    right: -30px;
    background-color: var(--color-accent);
    color: var(--color-white);
    padding: 25px 30px;
    border-radius: var(--radius-sm);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.year-num {
    display: block;
    font-family: var(--font-en);
    font-size: 48px;
    font-weight: 700;
    line-height: 1;
}

.year-text {
    font-size: 14px;
}

.about-text h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.about-text p {
    color: var(--color-text-light);
    margin-bottom: 20px;
}

.about-features {
    display: flex;
    gap: 40px;
    margin-top: 35px;
    padding-top: 35px;
    border-top: 1px solid var(--color-border);
}

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

.feature-num {
    display: block;
    font-family: var(--font-en);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-accent);
}

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

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
    
    .about-image {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .about-year {
        right: 20px;
        bottom: -20px;
    }
}

@media (max-width: 768px) {
    .about-text h3 {
        font-size: 24px;
    }
    
    .about-features {
        flex-wrap: wrap;
        justify-content: space-around;
    }
    
    .feature-num {
        font-size: 28px;
    }
}

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

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

.service-card {
    background-color: var(--color-white);
    padding: 40px 30px;
    border-radius: var(--radius-md);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid transparent;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}

.service-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 25px;
    color: var(--color-accent);
}

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

.service-card h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 15px;
}

.service-card > p {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 20px;
}

.service-list {
    text-align: left;
}

.service-list li {
    font-size: 14px;
    color: var(--color-text-light);
    padding: 8px 0;
    border-bottom: 1px solid var(--color-border);
    position: relative;
    padding-left: 20px;
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
}

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

@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .service-card {
        padding: 30px 25px;
    }
}

.cases {
    background-color: var(--color-bg-light);
}

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

.case-card {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

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

.case-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
    background-color: var(--color-auxiliary);
}

.case-card:hover .case-image img {
    transform: scale(1.08);
}

.case-overlay {
    position: absolute;
    top: 15px;
    left: 15px;
}

.case-category {
    display: inline-block;
    padding: 6px 14px;
    background-color: var(--color-accent);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
}

.case-info {
    padding: 25px;
}

.case-info h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.case-info p {
    font-size: 14px;
    color: var(--color-text-light);
}

@media (max-width: 1024px) {
    .cases-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .case-image {
        height: 200px;
    }
}

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

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

.team-card {
    text-align: center;
}

.team-image {
    width: 180px;
    height: 180px;
    margin: 0 auto 25px;
    border-radius: 50%;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    border: 4px solid var(--color-white);
}

.team-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    background-color: var(--color-primary);
}

.team-card h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.team-role {
    display: block;
    font-size: 14px;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 15px;
}

.team-card p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .team-card {
        max-width: 300px;
        margin: 0 auto;
    }
}

.news {
    background-color: var(--color-bg-light);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.news-card {
    background-color: var(--color-white);
    padding: 35px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.news-date {
    display: inline-block;
    font-family: var(--font-en);
    font-size: 13px;
    color: var(--color-text-light);
    margin-right: 15px;
}

.news-tag {
    display: inline-block;
    padding: 4px 12px;
    background-color: rgba(233, 69, 96, 0.1);
    color: var(--color-accent);
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
}

.news-card h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-primary);
    margin: 15px 0 12px;
    line-height: 1.4;
}

.news-card p {
    font-size: 15px;
    color: var(--color-text-light);
    margin-bottom: 18px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-accent);
}

.news-link:hover {
    color: #d13a54;
}

@media (max-width: 1024px) {
    .news-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .news-card {
        padding: 25px;
    }
    
    .news-card h4 {
        font-size: 18px;
    }
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-icon {
    flex-shrink: 0;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(233, 69, 96, 0.1);
    border-radius: 50%;
    color: var(--color-accent);
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-text h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 5px;
}

.contact-text p {
    font-size: 15px;
    color: var(--color-text-light);
}

.contact-form {
    background-color: var(--color-bg-light);
    padding: 40px;
    border-radius: var(--radius-md);
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    font-family: var(--font-cn);
    font-size: 15px;
    color: var(--color-text);
    background-color: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    outline: none;
}

.contact-form input:focus,
.contact-form textarea:focus {
    border-color: var(--color-accent);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--color-text-light);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

.contact-form .btn {
    width: 100%;
    text-align: center;
}

@media (max-width: 1024px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }
}

@media (max-width: 768px) {
    .contact-form {
        padding: 30px 25px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

.footer {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text {
    display: block;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
}

.footer-brand p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-links h4,
.footer-social h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links a {
    display: block;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.7);
    padding: 8px 0;
}

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

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    transition: var(--transition);
}

.social-icons a:hover {
    background-color: var(--color-accent);
    transform: translateY(-3px);
}

.social-icons svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
}

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

@media (max-width: 1024px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .social-icons {
        justify-content: center;
    }
}

.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-in:nth-child(1) { transition-delay: 0s; }
.fade-in:nth-child(2) { transition-delay: 0.1s; }
.fade-in:nth-child(3) { transition-delay: 0.2s; }
.fade-in:nth-child(4) { transition-delay: 0.3s; }
.fade-in:nth-child(5) { transition-delay: 0.4s; }
.fade-in:nth-child(6) { transition-delay: 0.5s; }