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

:root {
    --primary-color: #FF6B35;
    --secondary-color: #F7931E;
    --text-dark: #333333;
    --text-light: #666666;
    --bg-light: #FFF9F5;
    --bg-white: #FFFFFF;
    --border-color: #EEEEEE;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
}

html {
    scroll-behavior: smooth;
}

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

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo-img {
    height: 40px;
    width: auto;
    object-fit: contain;
}

.app-logo {
    height: 28px;
    width: auto;
    object-fit: contain;
}

.about-logo {
    max-width: 200px;
    max-height: 200px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 35px;
}

.nav-link2 {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link2::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 20px 80px;
    background: linear-gradient(135deg, var(--bg-light) 0%, #FFE8DC 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.1) 0%, transparent 70%);
}

.hero-content {
    flex: 1;
    max-width: 600px;
    z-index: 1;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 16px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 28px;
    color: var(--text-dark);
    margin-bottom: 20px;
    font-weight: 600;
}

.hero-description {
    font-size: 18px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
}

.app-badge {
    display: inline-block;
    background: linear-gradient(135deg, #FF6B35 0%, #F7931E 100%);
    color: white;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.hero-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 40px;
}

.feature-tag {
    display: inline-block;
    background: rgba(255, 107, 53, 0.1);
    color: var(--primary-color);
    padding: 10px 18px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid rgba(255, 107, 53, 0.2);
}

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

.btn {
    padding: 14px 36px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(255, 107, 53, 0.4);
}

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

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

.btn-full {
    width: 100%;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1;
}

/* 轮播样式 */
.carousel-container {
    position: relative;
    width: 380px;
    height: 680px;
    border-radius: 40px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

.carousel-slides {
    position: relative;
    width: 100%;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.5s ease-in-out;
}

.carousel-slide.active {
    opacity: 1;
}

.carousel-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 40px;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-color);
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    font-size: 28px;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.carousel-btn:hover {
    background: white;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.carousel-btn-prev {
    left: -20px;
}

.carousel-btn-next {
    right: -20px;
}

.carousel-indicators {
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.indicator {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: white;
    width: 30px;
    border-radius: 5px;
}

/* 服务介绍区域 */
.services {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--bg-white);
    padding: 35px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
}

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

.service-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.service-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.service-description {
    color: var(--text-light);
    line-height: 1.7;
}

/* 产品特色区域 */
.features {
    padding: 100px 0;
    background: var(--bg-light);
}

.features-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 40px;
    background: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-hover);
}

.feature-number {
    font-size: 64px;
    font-weight: 800;
    color: rgba(255, 107, 53, 0.15);
    min-width: 120px;
    text-align: center;
}

.feature-text h3 {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.feature-text p {
    color: var(--text-light);
    font-size: 17px;
    line-height: 1.7;
}

/* 关于我们区域 */
.about {
    padding: 100px 0;
    background: var(--bg-white);
}

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

.about-text .section-title {
    text-align: left;
    margin-bottom: 30px;
}

.about-text p {
    color: var(--text-light);
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-info-box {
    background: var(--bg-light);
    padding: 25px 30px;
    border-radius: 15px;
    margin-top: 25px;
    border-left: 4px solid var(--primary-color);
}

.about-info-box h4 {
    color: var(--primary-color);
    font-size: 18px;
    margin-bottom: 15px;
    font-weight: 600;
}

.about-info-box ul {
    list-style: none;
    padding: 0;
}

.about-info-box li {
    padding: 8px 0;
    color: var(--text-dark);
    font-size: 15px;
    line-height: 1.6;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.08);
}

.about-info-box li:last-child {
    border-bottom: none;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 25px;
    background: var(--bg-light);
    border-radius: 15px;
}

.stat-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-light);
    font-size: 15px;
    font-weight: 500;
}

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

.image-placeholder {
    width: 100%;
    max-width: 450px;
    aspect-ratio: 1;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-hover);
    padding: 40px;
}

/* 联系我们区域 */
.contact {
    padding: 100px 0;
    background: var(--bg-light);
}

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

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

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    background: var(--bg-white);
    padding: 25px;
    border-radius: 15px;
    box-shadow: var(--shadow);
}

.contact-icon {
    font-size: 36px;
    min-width: 50px;
}

.contact-detail h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

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

.contact-form-wrapper {
    background: var(--bg-white);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow);
}

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

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    transition: border-color 0.3s ease;
    outline: none;
}

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

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

/* 页脚 */
.footer {
    background: #2D3436;
    color: white;
    padding: 70px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 50px;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 28px;
    font-weight: bold;
    color: white;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: white;
}

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

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.3s ease;
}

.footer-column ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 25px;
    text-align: center;
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.icp {
    margin-top: 8px;
}

.icp a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 24px;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
    z-index: 999;
}

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

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 25px rgba(255, 107, 53, 0.4);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 48px;
    }

    .hero-subtitle {
        font-size: 24px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 50px;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-white);
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: 50px;
        gap: 30px;
        transition: left 0.3s ease;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        flex-direction: column;
        padding: 100px 20px 60px;
        text-align: center;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 20px;
    }

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

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

    .carousel-container {
        width: 320px;
        height: 600px;
        margin-top: 40px;
    }

    .section-title {
        font-size: 32px;
    }

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

    .feature-item {
        flex-direction: column;
        text-align: center;
        padding: 30px;
    }

    .feature-number {
        font-size: 48px;
        min-width: auto;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .btn {
        padding: 12px 28px;
        font-size: 14px;
    }

    .service-card {
        padding: 25px;
    }

    .contact-form-wrapper {
        padding: 25px;
    }
}