/* ============================================
   布局与组件样式
   ============================================ */

/* ---------- 头部 ---------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--color-border);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    white-space: nowrap;
}
.logo:hover { color: var(--color-primary-dark); }
.logo-text { color: inherit; }

.main-nav ul {
    display: flex;
    gap: 4px;
}

.main-nav a {
    display: block;
    padding: 8px 18px;
    color: var(--color-text);
    font-size: .95rem;
    font-weight: 500;
    border-radius: var(--radius);
    transition: var(--transition);
}

.main-nav a:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.main-nav a.active {
    color: var(--color-white);
    background: var(--color-primary);
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 轮播图 ---------- */
#slider {
    position: relative;
    overflow: hidden;
    border-radius: 0;
    background: var(--color-bg-alt);
}

.slider-track {
    display: flex;
    transition: transform .6s ease;
}

.slide {
    min-width: 100%;
    height: 400px;
}
.slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .85);
    color: var(--color-dark);
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    z-index: 10;
}
.slider-arrow:hover { background: var(--color-white); box-shadow: var(--shadow); }
.slider-arrow.prev { left: 20px; }
.slider-arrow.next { right: 20px; }

.slider-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}
.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, .5);
    transition: var(--transition);
}
.dot.active { background: var(--color-white); width: 28px; border-radius: 5px; }

/* ---------- 通用区块 ---------- */
.section {
    padding: 60px 0;
}
.section-alt {
    background: var(--color-bg-alt);
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
}
.section-title h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 8px;
}
.section-title p {
    color: var(--color-text-light);
    font-size: .95rem;
}

/* ---------- 卡片网格 ---------- */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    text-align: center;
}
.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--color-primary-light);
}
.card img {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    object-fit: contain;
}
.card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 12px;
}
.card p {
    color: var(--color-text-light);
    font-size: .9rem;
    line-height: 1.8;
    text-align: left;
}
.card .btn {
    margin-top: 20px;
}

/* ---------- 按钮 ---------- */
.btn {
    display: inline-block;
    padding: 10px 28px;
    border-radius: var(--radius);
    font-size: .9rem;
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
}
.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}
.btn-outline {
    border: 1px solid var(--color-border);
    color: var(--color-text);
}
.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ---------- 首页：关于简介 ---------- */
.about-brief {
    max-width: 800px;
    margin: 0 auto;
}
.about-brief .about-text p {
    margin-bottom: 16px;
    line-height: 1.9;
    color: var(--color-text);
}
.about-brief .about-text .btn {
    margin-top: 8px;
}

/* ---------- 内页布局 ---------- */
.page-banner {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
    padding: 50px 0;
    text-align: center;
}
.page-banner h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}
.page-banner .subtitle {
    font-size: .95rem;
    opacity: .85;
}

.page-content {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 40px;
    padding: 50px 0;
    align-items: start;
}

.page-main {
    min-width: 0; /* 防止 grid 溢出 */
}

/* 内页正文 */
.article p {
    margin-bottom: 16px;
    line-height: 1.9;
    text-indent: 2em;
    text-align: justify;
}
.article h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-dark);
    margin: 28px 0 14px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--color-border);
}

/* ---------- 侧边栏 ---------- */
.sidebar {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px 20px;
    position: sticky;
    top: calc(var(--header-height) + 20px);
}
.sidebar h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
}
.sidebar-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--color-border);
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list img {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
    object-fit: contain;
}
.sidebar-list .item-title {
    font-size: .9rem;
    font-weight: 600;
    color: var(--color-dark);
}
.sidebar-list .item-desc {
    font-size: .8rem;
    color: var(--color-text-light);
    margin-top: 2px;
}

/* ---------- 业务体系 ---------- */
.service-item {
    display: flex;
    gap: 24px;
    margin-bottom: 32px;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}
.service-item:hover {
    box-shadow: var(--shadow);
    border-color: var(--color-primary-light);
}
.service-item img {
    width: 80px;
    height: 110px;
    flex-shrink: 0;
    object-fit: contain;
    border-radius: var(--radius);
}
.service-item .service-body h3 {
    border: none;
    padding: 0;
    margin: 0 0 8px;
}
.service-item .service-body .service-tags {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 8px;
}
.service-item .service-body p {
    text-indent: 0;
    color: var(--color-text-light);
    font-size: .9rem;
    line-height: 1.8;
}

/* ---------- 企业文化 ---------- */
.culture-list {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.culture-list li {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 18px 24px;
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition);
}
.culture-list li:last-child { border-bottom: none; }
.culture-list li:hover {
    background: var(--color-primary-light);
}
.culture-list img {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    object-fit: contain;
}
.culture-list strong {
    color: var(--color-dark);
    font-weight: 600;
    min-width: 100px;
    flex-shrink: 0;
}
.culture-list .culture-text {
    color: var(--color-text);
}

/* ---------- 案例展示 ---------- */
.case-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 28px;
    flex-wrap: wrap;
}
.case-tab {
    padding: 8px 24px;
    border-radius: var(--radius);
    background: var(--color-bg-alt);
    color: var(--color-text);
    font-size: .9rem;
    font-weight: 500;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}
.case-tab:hover { border-color: var(--color-primary); color: var(--color-primary); }
.case-tab.active {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
}
.case-item {
    text-align: center;
}
.case-item a {
    display: block;
}
.case-item img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 4px;
    background: var(--color-white);
    transition: var(--transition);
}
.case-item a:hover img {
    border-color: var(--color-primary);
    box-shadow: var(--shadow);
}
.case-item span {
    display: block;
    margin-top: 8px;
    font-size: .85rem;
    color: var(--color-text-light);
}
.case-item a:hover span { color: var(--color-primary); }

/* ---------- 流程图 ---------- */
.process-image {
    text-align: center;
}
.process-image img {
    max-width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* ---------- 底部 ---------- */
.site-footer {
    background: var(--color-dark);
    color: var(--color-white);
    padding: 40px 0 24px;
    margin-top: 40px;
}
.footer-nav {
    text-align: center;
    margin-bottom: 20px;
}
.footer-nav a {
    color: rgba(255, 255, 255, .8);
    font-size: .9rem;
    margin: 0 4px;
}
.footer-nav a:hover { color: var(--color-white); }
.copyright {
    text-align: center;
    font-size: .85rem;
    color: rgba(255, 255, 255, .6);
    line-height: 1.8;
}
.copyright a {
    color: rgba(255, 255, 255, .6);
}
.copyright a:hover { color: var(--color-white); }

/* ---------- 响应式 ---------- */
@media (max-width: 968px) {
    .page-content {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .main-nav {
        position: absolute;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: var(--color-white);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height .3s ease;
    }
    .main-nav.open { max-height: 500px; }
    .main-nav ul {
        flex-direction: column;
        padding: 10px 20px;
    }
    .main-nav a {
        padding: 12px 16px;
        border-radius: var(--radius);
    }

    .slide { height: 240px; }

    .section { padding: 40px 0; }
    .section-title h2 { font-size: 1.4rem; }

    .page-banner { padding: 36px 0; }
    .page-banner h1 { font-size: 1.5rem; }

    .service-item { flex-direction: column; }
    .service-item img { width: 60px; height: 80px; }

    .culture-list strong { min-width: auto; display: block; }

    .case-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}