/* 全局样式 */
:root {
    --primary-color: #4F46E5;
    --secondary-color: #6B7280;
    --dark-color: #111827;
    --light-color: #F9FAFB;
    --accent-color: #818CF8;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--dark-color);
}

/* 导航栏样式 */
.navbar {
    box-shadow: 0 2px 4px rgba(0,0,0,0.04);
    padding: 1rem 0;
}

.navbar-brand img {
    height: 40px;
    width: auto;
}

.nav-link {
    font-weight: 500;
    color: var(--dark-color) !important;
    padding: 0.5rem 1rem !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

/* Hero 区域样式 */
.hero-section {
    padding-top: 8rem;
    padding-bottom: 6rem;
    background: linear-gradient(135deg, #F9FAFB 0%, #EEF2FF 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z' fill='%234F46E5' fill-opacity='0.03' fill-rule='evenodd'/%3E%3C/svg%3E");
    opacity: 0.5;
    pointer-events: none;
}

.hero-image-wrapper {
    position: relative;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.1);
    transition: transform 0.3s ease;
}

.hero-image-wrapper:hover {
    transform: translateY(-10px);
}

.hero-image-wrapper img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.hero-section h1 {
    font-weight: 800;
    line-height: 1.2;
    color: var(--dark-color);
    margin-bottom: 1.5rem;
}

.hero-section .lead {
    font-size: 1.25rem;
    color: var(--secondary-color);
    margin-bottom: 2rem;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #1d4ed8;
    border-color: #1d4ed8;
    transform: translateY(-1px);
}

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

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-1px);
}

.btn-lg {
    padding: 1rem 2rem;
}

/* 响应式调整 */
@media (max-width: 991.98px) {
    .hero-section {
        padding-top: 6rem;
        text-align: center;
    }

    .hero-section img {
        margin-top: 3rem;
    }

    .cta-buttons {
        justify-content: center;
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
    }
}

@media (max-width: 767.98px) {
    .hero-section h1 {
        font-size: 2.5rem;
    }

    .hero-section .lead {
        font-size: 1.1rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
    }
}

/* 特性卡片样式 */
.features-section {
    background: linear-gradient(180deg, var(--light-color) 0%, #EEF2FF 100%);
    padding: 6rem 0;
}

.feature-card {
    margin-bottom: 2rem;
}

@media (min-width: 768px) {
    .features-section .row {
        display: flex;
        flex-wrap: wrap;
        margin: -1rem;  /* 抵消内部padding */
    }

    .features-section .col-md-4 {
        padding: 1rem;
        display: flex;
    }

    .feature-card {
        width: 100%;
        height: 100%;
        display: flex;
        flex-direction: column;
        padding: 1.75rem;
        background: white;
        border-radius: 1rem;
        transition: all 0.3s ease;
        border: 1px solid rgba(79, 70, 229, 0.08);
        box-shadow: 0 4px 6px rgba(79, 70, 229, 0.04);
        position: relative;
        overflow: hidden;
        opacity: 0;
        transform: translateY(15px);
        animation: fadeInUp 0.5s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
        animation-delay: calc(var(--animation-order) * 0.08s);
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        right: 0;
        width: 100%;
        height: 100%;
        background: 
            radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.03) 0%, transparent 30%),
            linear-gradient(to bottom, transparent 0%, rgba(129, 140, 248, 0.03) 100%);
        z-index: 0;
    }

    .feature-card > * {
        position: relative;
        z-index: 1;
    }

    .feature-card:hover {
        transform: translateY(-8px) scale(1.03);
        box-shadow: 0 16px 32px rgba(79, 70, 229, 0.15);
        border-color: rgba(79, 70, 229, 0.25);
    }

    .feature-card:hover .feature-icon {
        transform: scale(1.15);
        background: linear-gradient(135deg, rgba(79, 70, 229, 0.2) 0%, rgba(129, 140, 248, 0.2) 100%);
    }

    .feature-card:hover h3 {
        color: var(--primary-color);
        transform: translateX(4px);
    }

    .feature-card:hover p {
        color: var(--dark-color);
    }

    .feature-icon {
        transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

    .feature-card h3 {
        transition: all 0.3s ease;
        display: inline-block;
    }

    .feature-card:hover .feature-icon {
        transform: scale(1.1);
        background: linear-gradient(135deg, rgba(79, 70, 229, 0.15) 0%, rgba(129, 140, 248, 0.15) 100%);
    }

    .feature-card:hover h3 {
        color: var(--primary-color);
    }

    .feature-card:hover p {
        color: var(--dark-color);
    }

    .feature-icon {
        transition: all 0.3s ease;
    }

    .feature-card h3 {
        transition: color 0.3s ease;
    }

    .feature-card p {
        transition: color 0.3s ease;
    }

    .features-section .row {
        margin: -0.875rem;
    }

    .features-section .col-md-4 {
        padding: 0.875rem;
    }

    .features-section {
        background: linear-gradient(180deg, var(--light-color) 0%, rgba(238, 242, 255, 0.5) 100%);
        padding: 5rem 0;
    }

    .features-section {
        padding: 3rem 0;
    }

    .features-section .row {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 1.25rem;
        margin: 0;
    }

    .features-section .col-md-4 {
        padding: 0;
        width: 100%;
    }

    .feature-card {
        padding: 1.25rem;
        height: 100%;
        opacity: 0;
        transform: translateY(20px);
        animation: fadeInUp 0.6s cubic-bezier(0.22, 0.61, 0.36, 1) forwards;
        animation-delay: calc(var(--animation-order) * 0.1s);
        position: relative;
        overflow: hidden;
    }

    .feature-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: 
            radial-gradient(circle at 20% 30%, rgba(79, 70, 229, 0.05) 0%, transparent 40%),
            linear-gradient(to bottom right, transparent 0%, rgba(129, 140, 248, 0.03) 100%);
        z-index: 0;
        opacity: 0;
        transition: opacity 0.3s ease;
    }

    .feature-card:hover::before {
        opacity: 1;
    }

    .feature-card > * {
        position: relative;
        z-index: 1;
    }

    @keyframes fadeInUp {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }

    @media (max-width: 575.98px) {
        .features-section .row {
            grid-template-columns: 1fr;
            gap: 1rem;
        }
    
        .feature-card {
            padding: 1.25rem;
        }
    }

    @media (min-width: 576px) and (max-width: 767.98px) {
        .features-section .row {
            grid-template-columns: repeat(2, 1fr);
            gap: 1.25rem;
        }
    }

    @media (min-width: 768px) and (max-width: 1199.98px) {
        .features-section .row {
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
        }
    
        .feature-card {
            padding: 1.5rem;
        }
    }

    @media (min-width: 1200px) {
        .features-section .row {
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 2rem;
        }
    
        .feature-card {
            padding: 1.75rem;
        }
    }

    .feature-card p {
        word-wrap: break-word;
        overflow-wrap: break-word;
        hyphens: auto;
    }

    @media (max-width: 991.98px) {
        .features-section .col-md-4 {
            width: 50%;
        }
    }

    @media (max-width: 575.98px) {
        .features-section .col-md-4 {
            width: 100%;
        }
    
        .feature-card {
            padding: 1.5rem;
        }
    }
}

.feature-card {
    height: 100%;
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    border: 1px solid rgba(79, 70, 229, 0.1);
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.15);
    border-color: rgba(79, 70, 229, 0.2);
}

.feature-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(129, 140, 248, 0.1) 100%);
    border-radius: 12px;
    margin-bottom: 1.25rem;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.feature-card h3 {
    font-size: 1.125rem;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    color: var(--dark-color);
}

.feature-card p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--secondary-color);
    margin-bottom: 0;
    flex-grow: 1;
}

.features-section {
    padding: 4rem 0;
}

@media (max-width: 991.98px) {
    .feature-card {
        text-align: left;
        align-items: flex-start;
    }
    
    .feature-icon {
        margin-left: 0;
    }
}

@media (max-width: 575.98px) {
    .features-section {
        padding: 3rem 0;
    }
    
    .feature-card h3 {
        font-size: 1rem;
    }
    
    .feature-card p {
        font-size: 0.9rem;
    }
}

.feature-icon::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent 0%, rgba(255, 255, 255, 0.2) 100%);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.feature-card:hover .feature-icon::before {
    transform: translateX(100%);
}

.feature-icon i {
    color: var(--primary-color);
    filter: drop-shadow(0 2px 4px rgba(79, 70, 229, 0.2));
}

.feature-card h3 {
    color: var(--dark-color);
    font-weight: 600;
    margin-bottom: 1rem;
    position: relative;
    display: inline-block;
}

.feature-card h3::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.feature-card:hover h3::after {
    width: 100%;
}

/* 统计数字样式 */
.stats-section {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(129, 140, 248, 0.03) 100%);
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
    border-top: 1px solid rgba(79, 70, 229, 0.05);
    border-bottom: 1px solid rgba(79, 70, 229, 0.05);
}

.stats-section .stat-item {
    transition: all 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.stats-section .stat-item:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.15) !important;
}

@media (max-width: 767.98px) {
    .stats-section .col-md-3 {
        margin-bottom: 1.5rem;
    }
    
    .stats-section .stat-item {
        padding: 1.5rem;
    }
    
    .stats-section .stat-item h2 {
        font-size: 2.5rem;
    }
}

.stats-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(to right, 
        transparent 0%, 
        rgba(79, 70, 229, 0.1) 50%,
        transparent 100%
    );
}

.stat-item {
    padding: 2.5rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 1.5rem;
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.08);
    transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
    position: relative;
    overflow: hidden;
}

.stat-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, 
        rgba(79, 70, 229, 0.05) 0%,
        rgba(129, 140, 248, 0.05) 100%
    );
    opacity: 0;
    transition: opacity 0.4s ease;
}

.stat-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(79, 70, 229, 0.12);
}

.stat-item:hover::before {
    opacity: 1;
}

.stat-item h2 {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.75rem;
    position: relative;
    display: inline-block;
}

.stat-item h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.stat-item:hover h2::after {
    width: 100%;
}

.stat-item p {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--secondary-color);
    margin: 0;
    position: relative;
    z-index: 1;
}

/* 联系页面样式 */
.contact-hero {
    background: linear-gradient(135deg, #F9FAFB 0%, #EEF2FF 100%);
    padding: 6rem 0 4rem;
}

.contact-info-card,
.contact-form-card {
    background: white;
    border-radius: 1rem;
    height: 100%;
    transition: all 0.3s ease;
    border: 1px solid rgba(79, 70, 229, 0.1);
    box-shadow: 0 4px 20px rgba(79, 70, 229, 0.05);
}

.contact-info-card:hover,
.contact-form-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(79, 70, 229, 0.1);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 1.5rem;
}

.icon-box {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-text h5 {
    color: var(--dark-color);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.contact-text p {
    color: var(--secondary-color);
    margin-bottom: 0;
}

.map-section {
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.03) 0%, rgba(129, 140, 248, 0.03) 100%);
}

.map-container {
    border: 1px solid rgba(79, 70, 229, 0.1);
}

/* 表单样式 */
.form-floating label {
    color: var(--secondary-color);
}

.form-floating>.form-control:focus~label,
.form-floating>.form-control:not(:placeholder-shown)~label,
.form-floating>.form-select~label {
    color: var(--primary-color);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(79, 70, 229, 0.25);
}

/* 表单验证样式 */
.form-floating.is-invalid .form-control {
    border-color: #dc3545;
}

.form-floating.is-invalid label {
    color: #dc3545;
}

.form-floating.is-invalid .invalid-feedback {
    display: block;
}

.form-floating.is-valid .form-control {
    border-color: #198754;
}

.form-floating.is-valid label {
    color: #198754;
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: #dc3545;
}

/* 响应式调整 */
@media (max-width: 991.98px) {
    .contact-content .col-lg-5 {
        margin-bottom: 2rem;
    }
}

@media (max-width: 767.98px) {
    .contact-hero {
        padding: 5rem 0 3rem;
    }
    
    .contact-hero h1 {
        font-size: 2.5rem;
    }
}

/* 页脚样式 */
footer {
    background: linear-gradient(135deg, #111827 0%, #1F2937 100%);
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
}

footer h5 {
    color: white;
    font-weight: 600;
    margin-bottom: 1.5rem;
    position: relative;
}

footer h5::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

footer a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: white;
}

.social-links a {
    display: inline-block;
    width: 40px;
    height: 40px;
    line-height: 40px;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transition: all 0.3s ease;
}

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

footer hr {
    opacity: 0.1;
}

/* 全局动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hero-section .col-lg-6:first-child {
    animation: fadeInUp 0.8s ease-out forwards;
}

.hero-section .col-lg-6:last-child {
    animation: scaleIn 0.8s ease-out forwards;
}

.feature-card {
    animation: fadeInUp 0.6s ease-out forwards;
    animation-delay: calc(var(--animation-order) * 0.1s);
}

.stat-item {
    animation: scaleIn 0.6s ease-out forwards;
    animation-delay: calc(var(--animation-order) * 0.1s);
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card, .stat-item {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* 响应式调整 */
@media (max-width: 767.98px) {
    .stat-item h2 {
        font-size: 2rem;
    }

    .stat-item p {
        font-size: 0.9rem;
    }

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

    .feature-icon {
        margin-left: auto;
        margin-right: auto;
    }
}

/* 语言切换下拉菜单样式 */
.dropdown-menu-language {
    width: calc(100% - 2rem);
    min-width: 800px;
    max-width: 100%;
    padding: 1.5rem;
    margin: 0 1rem;
}

.dropdown-menu-language .row {
    margin: 0 -1.5rem;
    justify-content: space-between;
}

.dropdown-menu-language .col {
    padding: 0 1.5rem;
    flex: 0 0 auto;
    width: auto;
}

.dropdown-menu-language .dropdown-header {
    padding-left: 0.5rem;
    font-weight: 600;
    color: var(--dark-color);
}

.dropdown-menu-language .dropdown-item {
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    transition: all 0.2s ease;
}

.dropdown-menu-language .dropdown-item:hover {
    background-color: rgba(79, 70, 229, 0.05);
    color: var(--primary-color);
}

.dropdown-menu-language .dropdown-item.active {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary-color);
}

.btn-language {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border: 1px solid rgba(79, 70, 229, 0.2);
    line-height: 1.5;
    height: calc(2.25rem + 2px);
}

.btn-language i {
    margin-right: 0.5rem;
    color: var(--primary-color);
}

.btn-language:hover {
    background-color: rgba(79, 70, 229, 0.05);
    border-color: rgba(79, 70, 229, 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(79, 70, 229, 0.1);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .dropdown-menu-language {
        min-width: 300px;
    }
    
    .dropdown-menu-language .row {
        flex-wrap: wrap;
    }
    
    .dropdown-menu-language .col {
        flex: 0 0 50%;
        margin-bottom: 1rem;
    }
}

@media (max-width: 576px) {
    .dropdown-menu-language {
        min-width: 280px;
    }
    
    .dropdown-menu-language .col {
        flex: 0 0 100%;
    }
}