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

:root {
    --us-primary-blue: #1e3a5f;
    --us-dark-blue: #0f1f33;
    --us-accent-orange: #e67e22;
    --us-light-orange: #f39c12;
    --us-text-dark: #2c3e50;
    --us-text-gray: #5d6d7e;
    --us-bg-light: #f8f9fa;
    --us-white: #ffffff;
    --us-border-color: #e0e6ed;
    --us-transition: all 0.3s ease;
}

body {
    font-family: "Microsoft YaHei", "Source Han Sans CN", "PingFang SC", sans-serif;
    color: var(--us-text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Banner区域 */
.us-hero-banner {
    height: 450px;
    background: linear-gradient(135deg, var(--us-dark-blue) 0%, var(--us-primary-blue) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

    .us-hero-banner::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: url('https://kimi-web-img.moonshot.cn/img/imgs.699pic.com/e9507128135e2d16d3dff893d153214fbd7521f9.v2') center/cover;
        opacity: 0.1;
    }

.us-hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--us-white);
    padding: 0 20px;
    animation: us-fadeInUp 1s ease;
}

@keyframes us-fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

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

.us-hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.us-hero-content p {
    font-size: 18px;
    opacity: 0.9;
    font-weight: 300;
}

.us-hero-divider {
    width: 60px;
    height: 3px;
    background: var(--us-accent-orange);
    margin: 20px auto;
}

/* 通用容器 */
.us-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.us-section {
    padding: 80px 0;
}

.us-section-title {
    text-align: center;
    margin-bottom: 50px;
}

    .us-section-title h2 {
        font-size: 36px;
        color: var(--us-primary-blue);
        margin-bottom: 15px;
        font-weight: 600;
    }

    .us-section-title p {
        color: var(--us-text-gray);
        font-size: 16px;
    }

.us-title-line {
    width: 50px;
    height: 3px;
    background: var(--us-accent-orange);
    margin: 15px auto;
}

/* 联系信息卡片区域 */
.us-contact-info-section {
    background: var(--us-white);
    padding: 60px 0;
}

.us-contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
    margin-bottom: 40px;
}

.us-contact-card {
    background: var(--us-white);
    padding: 35px 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
    transition: var(--us-transition);
    border: 1px solid var(--us-border-color);
    position: relative;
    overflow: hidden;
}

    .us-contact-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 15px 35px rgba(0,0,0,0.1);
        border-color: var(--us-accent-orange);
    }

    .us-contact-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: var(--us-accent-orange);
        transform: scaleX(0);
        transition: var(--us-transition);
    }

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

.us-contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--us-primary-blue), var(--us-dark-blue));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--us-white);
    font-size: 24px;
    transition: var(--us-transition);
}

.us-contact-card:hover .us-contact-icon {
    background: var(--us-accent-orange);
    transform: scale(1.1);
}

.us-contact-card h3 {
    font-size: 18px;
    color: var(--us-primary-blue);
    margin-bottom: 10px;
    font-weight: 600;
}

.us-contact-card p,
.us-contact-card a {
    color: var(--us-text-gray);
    font-size: 15px;
    text-decoration: none;
    display: block;
    margin-bottom: 5px;
    transition: var(--us-transition);
}

    .us-contact-card a:hover {
        color: var(--us-accent-orange);
    }

.us-contact-label {
    font-size: 12px;
    color: var(--us-accent-orange);
    margin-top: 10px;
    font-weight: 500;
}

/* 表单与地图区域 */
.us-form-map-section {
    background: var(--us-bg-light);
    padding-top:100px;
}

.us-form-map-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 50px;
    align-items: start;
}

/* 表单样式 */
.us-form-container {
    background: var(--us-white);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.us-form-title {
    font-size: 24px;
    color: var(--us-primary-blue);
    margin-bottom: 30px;
    font-weight: 600;
}

.us-form-group {
    margin-bottom: 25px;
}

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

.us-form-label {
    display: block;
    margin-bottom: 8px;
    color: var(--us-text-dark);
    font-size: 14px;
    font-weight: 500;
}

    .us-form-label span {
        color: var(--us-accent-orange);
        margin-left: 3px;
    }

.us-form-input,
.us-form-select,
.us-form-textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--us-border-color);
    border-radius: 8px;
    font-size: 15px;
    font-family: inherit;
    transition: var(--us-transition);
    background: var(--us-white);
}

    .us-form-input:focus,
    .us-form-select:focus,
    .us-form-textarea:focus {
        outline: none;
        border-color: var(--us-accent-orange);
        box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.1);
    }

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

.us-form-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 15px center;
    padding-right: 40px;
}

.us-form-hint {
    font-size: 12px;
    color: var(--us-text-gray);
    margin-top: 5px;
}

.us-form-submit {
    background: linear-gradient(135deg, var(--us-accent-orange), var(--us-light-orange));
    color: var(--us-white);
    border: none;
    padding: 15px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--us-transition);
    width: 100%;
    position: relative;
    overflow: hidden;
}

    .us-form-submit:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 20px rgba(230, 126, 34, 0.3);
    }

    .us-form-submit:active {
        transform: translateY(0);
    }

/* 地图容器 */
.us-map-container {
    background: var(--us-white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

.us-map-title {
    font-size: 20px;
    color: var(--us-primary-blue);
    margin-bottom: 20px;
    font-weight: 600;
}

.us-map-placeholder {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.us-map-address {
    padding: 15px;
    background: var(--us-bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--us-accent-orange);
}

    .us-map-address h4 {
        color: var(--us-primary-blue);
        margin-bottom: 8px;
        font-size: 16px;
    }

    .us-map-address p {
        color: var(--us-text-gray);
        font-size: 14px;
        line-height: 1.6;
    }

/* 常见问题 */
.us-faq-section {
    background: var(--us-white);
}

.us-faq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.us-faq-item {
    background: var(--us-bg-light);
    padding: 25px;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--us-transition);
    border: 1px solid transparent;
}

    .us-faq-item:hover {
        background: var(--us-white);
        border-color: var(--us-border-color);
        box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }

.us-faq-question {
    font-size: 16px;
    font-weight: 600;
    color: var(--us-primary-blue);
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.us-faq-icon {
    color: var(--us-accent-orange);
    font-size: 20px;
    transition: var(--us-transition);
}

.us-faq-item.us-active .us-faq-icon {
    transform: rotate(45deg);
}

.us-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    color: var(--us-text-gray);
    font-size: 14px;
    line-height: 1.6;
}

.us-faq-item.us-active .us-faq-answer {
    max-height: 200px;
    margin-top: 10px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .us-contact-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .us-form-map-grid {
        grid-template-columns: 1fr;
    }

    .us-faq-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .us-hero-content h1 {
        font-size: 32px;
    }

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

    .us-form-row {
        grid-template-columns: 1fr;
    }

    .us-section {
        padding: 60px 0;
    }

    .us-section-title h2 {
        font-size: 28px;
    }

    .us-form-container,
    .us-map-container {
        padding: 25px;
    }
}

/* 成功提示 */
.us-success-message {
    display: none;
    background: #d4edda;
    color: #155724;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
    border: 1px solid #c3e6cb;
}

    .us-success-message.us-show {
        display: block;
        animation: us-fadeIn 0.5s ease;
    }

@keyframes us-fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}