@charset "utf-8";

@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");
:root {
    --primary-color: #0066cc;
    --primary-dark: #004499;
    --primary-light: #3388ff;
    --secondary-color: #00d4ff;
    --accent-color: #ff6b35;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-dark: #1a1a1a;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --gradient-primary: linear-gradient(
        135deg,
        var(--primary-color) 0%,
        var(--primary-light) 100%
    );
    --gradient-secondary: linear-gradient(
        135deg,
        var(--secondary-color) 0%,
        var(--primary-light) 100%
    );
    --gradient-hero: linear-gradient(135deg, #0066cc 0%, #3388ff 100%);
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family:
        "Inter",
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 3rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.card {
    background: var(--bg-primary);
    border-radius: 16px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    overflow: hidden;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 16px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.15);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
    font-weight: 600;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 8px 12px;
    transition: all 0.3s ease;
}

.logo:hover {
    transform: translateY(-2px);
}

.logo img {
    height: 60px;
    width: auto;
    filter: drop-shadow(0 1px 3px rgba(0, 0, 0, 0.15));
    transition: all 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
    filter: drop-shadow(0 2px 6px rgba(0, 102, 204, 0.25));
}

.logo-text {
    font-size: 1.6rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all 0.3s ease;
}

.logo:hover .logo-text {
    transform: translateX(2px);
}

.nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(0, 102, 204, 0.1);
}

.nav-link-active {
    color: var(--primary-color);
    background: rgba(0, 102, 204, 0.1);
    font-weight: 600;
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    min-width: 200px;
    z-index: 1001;
}

.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-dropdown-item {
    display: block;
    padding: 12px 20px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

.nav-dropdown-item:last-child {
    border-bottom: none;
}

.nav-dropdown-item:hover {
    color: var(--primary-color);
    background: rgba(0, 102, 204, 0.05);
}

/* 英雄区域 */
.hero {
    background: var(--gradient-hero);
    color: white;
    padding: 120px 0 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    padding-top: 80px;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    font-weight: 300;
}

.hero-cta {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 2.5rem;
}

/* 英雄区域按钮特殊样式 */
.hero .btn-primary {
    background: linear-gradient(135deg, #ffffff 0%, #f8f9fa 100%);
    color: var(--primary-color);
    border: 2px solid rgba(255, 255, 255, 0.3);
    font-weight: 700;
    font-size: 1.1rem;
    padding: 15px 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.hero .btn-primary:hover {
    background: linear-gradient(135deg, #ffffff 0%, #e9ecef 100%);
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.2);
    color: var(--primary-dark);
}

.hero .btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(15px);
    font-weight: 700;
    font-size: 1.1rem;
    padding: 15px 30px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.hero .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(255, 255, 255, 0.15);
}

/* 特色区域 */
.features {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    padding: 2rem;
    text-align: center;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: white;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 服务区域 */
.services {
    padding: 80px 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    padding: 2rem;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
}

.service-card:hover {
    border-left-color: var(--secondary-color);
}

.service-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.service-description {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
}

.service-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* 移动端菜单 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }

    .features-grid,
    .services-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2.2rem;
    }

    /* 卡片间距优化 */
    .card {
        margin-bottom: 2rem;
    }

    /* 按钮组优化 */
    .hero-cta {
        gap: 1.5rem;
    }
}

/* 平板横屏优化 */
@media (max-width: 900px) and (min-width: 769px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.3rem;
    }

    .container {
        padding: 0 30px;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
        line-height: 1.2;
        margin-bottom: 1rem;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 2rem;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .logo {
        padding: 6px 10px;
        gap: 12px;
    }

    .logo img {
        height: 50px;
    }

    .logo-text {
        font-size: 1.4rem;
    }

    .nav {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 2rem;
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
        z-index: 999;
        max-height: 70vh;
        overflow-y: auto;
    }

    .nav.nav-open {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-item {
        margin-bottom: 1rem;
    }

    .nav-link {
        padding: 12px 16px;
        font-size: 1.1rem;
        border-radius: 8px;
        display: block;
    }

    .nav-dropdown {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--bg-secondary);
        margin-top: 0.5rem;
        border-radius: 8px;
    }

    .features-grid,
    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .feature-card,
    .service-card {
        padding: 1.5rem;
        margin-bottom: 1rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .hero .btn-primary,
    .hero .btn-secondary {
        width: 100%;
        max-width: 280px;
        padding: 14px 24px;
        font-size: 1.1rem;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .section {
        padding: 60px 0;
    }

    .container {
        padding: 0 15px;
    }

    /* 卡片优化 */
    .card {
        margin-bottom: 1.5rem;
        border-radius: 12px;
    }

    /* 按钮优化 */
    .btn {
        min-height: 48px;
        border-radius: 8px;
        font-weight: 600;
    }

    /* 联系页面移动端优化 */
    .contact-grid {
        grid-template-columns: 1fr !important;
    }

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

    .contact-info-item {
        grid-column: span 1 !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
        line-height: 1.2;
    }

    .hero-subtitle {
        font-size: 0.95rem;
        line-height: 1.4;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }

    .container {
        padding: 0 12px;
    }

    .card {
        padding: 1.2rem !important;
        margin-bottom: 1.2rem;
        border-radius: 10px;
    }

    .feature-card {
        padding: 1.2rem;
        text-align: center;
    }

    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin: 0 auto 1rem;
    }

    .feature-title {
        font-size: 1.1rem;
        margin-bottom: 0.8rem;
    }

    .feature-description {
        font-size: 0.9rem;
        line-height: 1.4;
    }

    .service-card {
        padding: 1.2rem;
    }

    .service-title {
        font-size: 1.1rem;
    }

    .service-description {
        font-size: 0.9rem;
        line-height: 1.4;
    }

    /* 按钮优化 */
    .btn {
        padding: 12px 20px;
        font-size: 1rem;
        width: 100%;
        margin: 0.5rem 0;
    }

    .hero .btn-primary,
    .hero .btn-secondary {
        max-width: none;
        width: 100%;
        padding: 14px 20px;
    }

    /* 导航优化 */
    .nav {
        padding: 1.5rem;
    }

    .nav-link {
        padding: 10px 14px;
        font-size: 1rem;
    }

    /* 表单优化 */
    input,
    textarea,
    select {
        font-size: 16px; /* 防止iOS缩放 */
        padding: 12px;
        border-radius: 6px;
    }

    /* 文本优化 */
    h1 {
        font-size: 1.6rem;
        line-height: 1.2;
    }

    h2 {
        font-size: 1.4rem;
        line-height: 1.3;
    }

    h3 {
        font-size: 1.2rem;
        line-height: 1.3;
    }

    p {
        font-size: 0.9rem;
        line-height: 1.5;
    }
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    /* 增大触摸目标 */
    .btn,
    .nav-link,
    button,
    [role="button"] {
        min-height: 44px;
        min-width: 44px;
        padding: 12px 16px;
    }

    /* 移除悬停效果 */
    .card:hover {
        transform: none;
        box-shadow: var(--shadow-md);
    }

    .btn:hover {
        transform: none;
    }

    /* 优化点击反馈 */
    .btn:active,
    .nav-link:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }
}

/* 高对比度优化 */
@media (prefers-contrast: high) {
    :root {
        --border-color: #333;
        --text-secondary: #333;
    }

    .card {
        border: 2px solid var(--border-color);
    }
}

/* 减少动画优化 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}