/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 变量定义 */
:root {
    --primary-color: #1a73e8;
    --secondary-color: #4285f4;
    --accent-color: #0d47a1;
    --gray-light: #f5f5f5;
    --gray-medium: #e0e0e0;
    --gray-dark: #666;
    --text-color: #333;
    --text-light: #777;
    --white: #ffffff;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --border-radius: 4px;
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航样式 */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    flex-wrap: nowrap;
    min-width: 100%;
}

.nav__logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
    white-space: nowrap;
    flex-shrink: 0;
}

.nav__menu {
    display: flex;
    list-style: none;
    gap: 15px;
    flex-shrink: 0;
}

.nav__link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 10px;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav__item {
    position: relative;
}

.nav__link {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    padding: 8px 12px;
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
}

.nav__link:hover {
    background-color: var(--gray-light);
    color: var(--primary-color);
}

/* 移动端导航 */
.nav__toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* Banner样式 */
.banner {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: var(--white);
    padding: 80px 0;
    text-align: center;
}

.banner__content {
    max-width: 800px;
    margin: 0 auto;
}

.banner__title {
    font-size: 2.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.banner__subtitle {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.banner__btn {
    display: inline-block;
    background-color: var(--white);
    color: var(--primary-color);
    padding: 12px 30px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
}

.banner__btn:hover {
    background-color: var(--gray-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* 服务卡片样式（CSS替代图片） */
.services {
    padding: 80px 0;
}

.services__title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--text-color);
}

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

.service-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.service-card__visual {
    height: 150px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.2rem;
    font-weight: bold;
    text-align: center;
    padding: 20px;
}

.service-card__content {
    padding: 20px;
}

.service-card__title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.service-card__desc {
    color: var(--text-light);
    margin-bottom: 20px;
    line-height: 1.6;
}

.service-card__price {
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.service-card__btn {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--white);
    padding: 10px 20px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.service-card__btn:hover {
    background-color: var(--accent-color);
}

/* 优势/案例区 */
.advantages {
    padding: 80px 0;
    background-color: var(--gray-light);
}

.advantages__title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--text-color);
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.advantage-item {
    background-color: var(--white);
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    text-align: center;
}

.advantage-item__icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin: 0 auto 20px;
}

.advantage-item__title {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.advantage-item__desc {
    color: var(--text-light);
    line-height: 1.6;
}

/* 联系方式样式 */
.contact {
    padding: 80px 0;
    background-color: var(--white);
}

.contact__title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 50px;
    color: var(--text-color);
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact__item {
    display: flex;
    align-items: center;
    gap: 15px;
}

.contact__item-icon {
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.contact__item-info h3 {
    font-size: 1rem;
    margin-bottom: 5px;
    color: var(--text-color);
}

.contact__item-info p {
    color: var(--text-light);
}

.contact__qrcode {
    text-align: center;
}

.contact__qrcode img {
    max-width: 200px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.contact__qrcode p {
    margin-top: 15px;
    color: var(--text-light);
    font-size: 0.9rem;
}

/* 底部样式 */
.footer {
    background-color: var(--text-color);
    color: var(--white);
    padding: 30px 0;
    text-align: center;
}

.footer__content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer__links {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.footer__link {
    color: var(--white);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.footer__copy {
    font-size: 0.8rem;
    opacity: 0.8;
}

/* 栏目页样式 */
.category {
    padding: 50px 0;
}

.category__header {
    margin-bottom: 50px;
    text-align: center;
}

.category__title {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.category__desc {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 800px;
    margin: 0 auto;
}

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

/* 列表页样式 */
.list {
    padding: 50px 0;
}

.list__header {
    margin-bottom: 50px;
    text-align: center;
}

.list__title {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.list__filter {
    margin-bottom: 30px;
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.list__filter-btn {
    padding: 8px 16px;
    border: 1px solid var(--gray-medium);
    background-color: var(--white);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all 0.3s ease;
}

.list__filter-btn:hover, .list__filter-btn.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

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

/* 内容页样式 */
.content {
    padding: 50px 0;
}

.content__header {
    margin-bottom: 50px;
}

.content__title {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-color);
}

.content__meta {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

.content__body {
    background-color: var(--white);
    padding: 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    margin-bottom: 50px;
}

.content__section {
    margin-bottom: 30px;
}

.content__section-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-color);
}

.content__section-text {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
}

.content__customization {
    background-color: var(--gray-light);
    padding: 20px;
    border-radius: var(--border-radius);
    margin: 30px 0;
}

.content__price {
    font-weight: bold;
    color: var(--primary-color);
    margin: 30px 0;
}

.content__related {
    margin-top: 50px;
}

.content__related-title {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-color);
}

.content__related-items {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 导航 */
    .nav__menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--white);
        flex-direction: column;
        align-items: center;
        padding: 20px 0;
        box-shadow: var(--shadow);
        transform: translateY(-150%);
        opacity: 0;
        transition: all 0.3s ease;
        z-index: 999;
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
    }

    .nav__toggle {
        display: block;
    }

    /* Banner */
    .banner__title {
        font-size: 2rem;
    }

    .banner__subtitle {
        font-size: 1rem;
    }

    /* 联系方式 */
    .contact__content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .contact__item {
        justify-content: center;
    }

    /* 服务卡片 */
    .services__grid,
    .advantages__grid,
    .category__services,
    .list__items {
        grid-template-columns: 1fr;
    }

    /* 内容页 */
    .content__body {
        padding: 20px;
    }

    /* 标题调整 */
    .services__title,
    .advantages__title,
    .contact__title,
    .category__title,
    .list__title,
    .content__title {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    /* Banner */
    .banner {
        padding: 60px 0;
    }

    .banner__title {
        font-size: 1.5rem;
    }

    /* 服务卡片 */
    .service-card__visual {
        height: 120px;
        font-size: 1rem;
    }

    /* 优势项 */
    .advantage-item__icon {
        width: 60px;
        height: 60px;
        font-size: 1.2rem;
    }

    /* 内容页 */
    .content__body {
        padding: 15px;
    }
}

/* 客户反馈样式 */
.feedback {
    padding: 50px 0;
    background-color: var(--gray-light);
}

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

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

.feedback-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.feedback-card__stars {
    color: #ffc107;
    font-size: 1.2rem;
    margin-bottom: 15px;
}

.feedback-card__text {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 20px;
    font-style: italic;
}

.feedback-card__author {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.feedback-card__name {
    font-weight: bold;
    color: var(--text-color);
}

.feedback-card__company {
    font-size: 0.9rem;
    color: var(--text-light);
}

/* 辅助类 */
.text-center {
    text-align: center;
}

.mt-10 {
    margin-top: 10px;
}

.mt-20 {
    margin-top: 20px;
}

.mt-30 {
    margin-top: 30px;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-30 {
    margin-bottom: 30px;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--gray-medium);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 无障碍支持 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 问答部分样式 */
.faq__items {
    margin-top: 20px;
}

.faq__item {
    margin-bottom: 20px;
    border-radius: var(--border-radius);
    background-color: var(--white);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.faq__item:hover {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.faq__question {
    width: 100%;
    padding: 20px;
    background-color: var(--primary-color);
    border: none;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--white);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.3s ease;
}

.faq__question:hover {
    background-color: var(--accent-color);
}

.faq__question::after {
    content: "▼";
    font-size: 0.9rem;
    transition: transform 0.3s ease;
}

.faq__answer {
    padding: 20px;
    background-color: var(--gray-light);
}

.faq__answer p {
    color: var(--text-color);
    line-height: 1.6;
    font-size: 1rem;
}

/* 打印样式 */
@media print {
    .nav,
    .banner,
    .footer {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }

    .container {
        width: 100%;
        max-width: 100%;
        padding: 0;
    }
}