/* ========== CSS Variables ========== */
:root {
    --primary: #6C5CE7;
    --primary-dark: #5A4BD1;
    --primary-light: #A29BFE;
    --primary-bg: #F0EDFF;
    --secondary: #00CEC9;
    --accent: #FD79A8;
    --dark: #2D3436;
    --dark-light: #636E72;
    --gray: #B2BEC3;
    --gray-light: #DFE6E9;
    --white: #FFFFFF;
    --bg: #FAFBFC;
    --shadow: 0 4px 20px rgba(108, 92, 231, 0.1);
    --shadow-lg: 0 10px 40px rgba(108, 92, 231, 0.15);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--dark);
    background: var(--bg);
    line-height: 1.6;
    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 {
    padding: 100px 0;
}

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

.section-header h2 {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

.section-header p {
    color: var(--dark-light);
    font-size: 1.1rem;
    margin-top: 16px;
}

/* ========== Buttons ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-color: var(--primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(108, 92, 231, 0.4);
}

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

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

.btn-full {
    width: 100%;
    justify-content: center;
}

/* ========== Navbar ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    border-bottom-color: var(--gray-light);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--primary);
}

.logo-img {
    height: 36px;
    width: auto;
}

.footer .logo-img {
    mix-blend-mode: screen;
}

.logo i {
    font-size: 1.5rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

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

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

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

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

.lang-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border: 1px solid var(--gray-light);
    border-radius: 50px;
    background: var(--white);
    color: var(--dark-light);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.lang-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--dark);
    cursor: pointer;
    padding: 4px;
}

/* ========== Hero ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #F8F7FF 0%, #EEEAFF 50%, #E8F4FD 100%);
    overflow: hidden;
    padding-top: 70px;
}

.hero-bg-shapes .shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.15;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    right: -100px;
    animation: float 8s ease-in-out infinite;
}

.shape-2 {
    width: 250px;
    height: 250px;
    background: var(--secondary);
    bottom: 10%;
    left: -50px;
    animation: float 6s ease-in-out infinite reverse;
}

.shape-3 {
    width: 150px;
    height: 150px;
    background: var(--accent);
    top: 40%;
    right: 20%;
    animation: float 10s ease-in-out infinite;
}

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

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--dark-light);
    margin-bottom: 12px;
}

.hero-desc {
    font-size: 1rem;
    color: var(--gray);
    margin-bottom: 32px;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: var(--dark-light);
    margin-top: 4px;
}

.hero-illustration {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-img {
    max-width: 480px;
    width: 100%;
    height: auto;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 20px 40px rgba(108, 92, 231, 0.15));
}

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

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

.about-text p {
    color: var(--dark-light);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 16px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
    color: var(--dark);
}

.feature-item i {
    color: var(--secondary);
    font-size: 1.1rem;
}

.about-cards {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.info-card {
    background: var(--bg);
    padding: 32px;
    border-radius: var(--radius-lg);
    transition: var(--transition);
    border: 1px solid var(--gray-light);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.info-card i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.info-card h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--dark);
}

.info-card p {
    color: var(--dark-light);
    font-size: 0.95rem;
}

/* ========== Services ========== */
.services {
    background: var(--bg);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.service-card {
    background: var(--white);
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

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

.service-icon {
    width: 64px;
    height: 64px;
    border-radius: 16px;
    background: var(--primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: var(--transition);
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

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

.service-card:hover .service-icon i {
    color: var(--white);
}

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

.service-card p {
    color: var(--dark-light);
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.service-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.service-tags li {
    padding: 4px 12px;
    background: var(--primary-bg);
    color: var(--primary);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* ========== Cases Carousel ========== */
.cases {
    background: var(--white);
}

.carousel {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.carousel-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    min-width: 100%;
    position: relative;
}

.carousel-slide img {
    width: 100%;
    height: 520px;
    object-fit: cover;
    display: block;
}

.carousel-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 32px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.75));
    color: var(--white);
}

.carousel-caption h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
}

.carousel-caption p {
    font-size: 0.92rem;
    opacity: 0.85;
    line-height: 1.6;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.9);
    color: var(--dark);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
    z-index: 2;
}

.carousel-btn:hover {
    background: var(--white);
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: 16px;
}

.carousel-next {
    right: 16px;
}

.carousel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 2;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.7);
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.carousel-dot.active {
    background: var(--white);
    border-color: var(--white);
}

@media (max-width: 768px) {
    .carousel-slide img {
        height: 260px;
    }

    .carousel-caption {
        padding: 20px;
    }

    .carousel-caption h3 {
        font-size: 1.1rem;
    }

    .carousel-btn {
        width: 36px;
        height: 36px;
        font-size: 0.85rem;
    }
}

/* ========== Process ========== */
.process {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
}

.process .section-header h2 {
    color: var(--white);
}

.process .section-header h2::after {
    background: linear-gradient(90deg, var(--white), var(--secondary));
}

.process .section-header p {
    color: rgba(255, 255, 255, 0.8);
}

.process-steps {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 55px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: rgba(255, 255, 255, 0.2);
}

.step {
    text-align: center;
    flex: 1;
    position: relative;
}

.step-number {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.step-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.step:hover .step-icon {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.1);
}

.step-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.step h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}

.step p {
    font-size: 0.88rem;
    color: rgba(255, 255, 255, 0.75);
    max-width: 180px;
    margin: 0 auto;
}

/* ========== Contact ========== */
.contact {
    background: var(--bg);
}

.contact-card {
    display: flex;
    align-items: stretch;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-light);
    max-width: 780px;
    margin: 0 auto;
    overflow: hidden;
}

.contact-left {
    flex-shrink: 0;
    padding: 40px 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-bg);
}

.contact-qrcode {
    text-align: center;
}

.contact-qrcode img {
    width: 240px;
    height: auto;
    margin: 0 auto 14px;
    border-radius: var(--radius);
}

.contact-qrcode p {
    color: var(--dark-light);
    font-size: 0.88rem;
    font-weight: 500;
}

.contact-divider {
    width: 1px;
    background: var(--gray-light);
}

.contact-info {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 32px;
    padding: 40px 44px;
    flex: 1;
}

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

.contact-icon {
    width: 56px;
    height: 56px;
    min-width: 56px;
    border-radius: 16px;
    background: var(--primary-bg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon i {
    font-size: 1.4rem;
    color: var(--primary);
}

.contact-item h4 {
    font-size: 0.9rem;
    color: var(--dark-light);
    margin-bottom: 4px;
    font-weight: 500;
}

.contact-item p {
    font-size: 1.05rem;
    color: var(--dark);
    font-weight: 600;
}

/* ========== Footer ========== */
.footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 60px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 16px;
}

.footer-brand p {
    font-size: 0.92rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-links h4 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-bottom {
    text-align: center;
    padding: 24px 0;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom p {
    margin-bottom: 8px;
}

.footer-bottom p:last-child {
    margin-bottom: 0;
}

.footer-icp {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 4px;
    font-size: 0.8rem;
}

.footer-icp a {
    color: rgba(255, 255, 255, 0.4);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.footer-icon {
    height: 16px;
    width: auto;
    vertical-align: middle;
}

.footer-icp a:hover {
    color: var(--primary-light);
}

.footer-sep {
    margin: 0 6px;
    opacity: 0.3;
}

/* ========== License Modal ========== */
.license-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.license-modal.active {
    display: flex;
}

.license-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.license-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    max-height: 90vh;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    -webkit-user-select: none;
    user-select: none;
}

.license-content img {
    width: 100%;
    height: auto;
    display: block;
    pointer-events: none;
}

.license-close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.5);
    color: var(--white);
    font-size: 1.4rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 2;
}

.license-close:hover {
    background: rgba(0, 0, 0, 0.8);
}

/* ========== Back to Top ========== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.4);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(108, 92, 231, 0.5);
}

/* ========== Animations ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-illustration {
        display: none;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

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

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

    .contact-card {
        flex-direction: column;
    }

    .contact-divider {
        width: auto;
        height: 1px;
        align-self: auto;
        margin: 0 32px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        transform: translateY(-120%);
        transition: var(--transition);
        z-index: 999;
    }

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

    .nav-links li {
        width: 100%;
    }

    .nav-links a {
        display: block;
        padding: 12px 16px;
        border-radius: 8px;
    }

    .nav-links a:hover {
        background: var(--primary-bg);
    }

    .menu-toggle {
        display: block;
    }

    .hero-content h1 {
        font-size: 2.2rem;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .hero-stats {
        gap: 24px;
    }

    .section {
        padding: 70px 0;
    }

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

    .process-steps {
        flex-direction: column;
        gap: 32px;
    }

    .process-steps::before {
        display: none;
    }

    .step {
        display: flex;
        align-items: center;
        gap: 20px;
        text-align: left;
    }

    .step-icon {
        margin: 0;
        min-width: 60px;
        width: 60px;
        height: 60px;
    }

    .step p {
        max-width: none;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }

    .stat-number {
        font-size: 1.5rem;
    }

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

    .contact-form-wrapper {
        padding: 24px;
    }
}