/* ========================================
   张家口市蔚县音创云图互联网有限公司 官方网站
   全局样式
   ======================================== */

/* CSS变量 */
:root {
    --color-primary: #1a1a1a;
    --color-secondary: #f5f2ed;
    --color-accent: #c8a45c;
    --color-accent-hover: #b8944c;
    --color-text: #2c2c2c;
    --color-text-light: #6b6b6b;
    --color-text-muted: #999;
    --color-bg: #f5f2ed;
    --color-bg-white: #ffffff;
    --color-bg-card: #ffffff;
    --color-border: #e0dcd6;
    --color-border-light: #ebe8e3;
    --font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1200px;
    --header-height: 72px;
    --radius: 6px;
    --radius-lg: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.1);
    --transition: 0.3s ease;
}

/* 重置 */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ========================================
   导航栏
   ======================================== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-primary);
    height: var(--header-height);
    transition: background var(--transition), box-shadow var(--transition);
}

.site-header.scrolled {
    background: rgba(26, 26, 26, 0.95);
    box-shadow: 0 2px 20px rgba(0,0,0,0.15);
    backdrop-filter: blur(10px);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-menu a {
    display: block;
    padding: 8px 14px;
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    font-weight: 400;
    letter-spacing: 0.5px;
    position: relative;
    transition: color var(--transition);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 14px;
    right: 14px;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: transform var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #fff;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    transform: scaleX(1);
}

/* 汉堡菜单 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    transition: var(--transition);
}

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

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========================================
   主内容区
   ======================================== */
.site-main {
    min-height: calc(100vh - 200px);
    padding-top: var(--header-height);
}

/* ========================================
   页面头部横幅
   ======================================== */
.page-banner {
    background: var(--color-primary);
    padding: 80px 24px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(200,164,92,0.08) 0%, transparent 50%);
}

.page-banner h1 {
    font-size: 36px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 4px;
    margin-bottom: 12px;
    position: relative;
}

.page-banner p {
    font-size: 15px;
    color: rgba(255,255,255,0.5);
    letter-spacing: 1px;
    position: relative;
}

/* ========================================
   容器
   ======================================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 60px 0;
}

.section-header {
    margin-bottom: 40px;
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.section-subtitle {
    font-size: 14px;
    color: var(--color-text-light);
    letter-spacing: 1px;
}

.section-divider {
    width: 48px;
    height: 3px;
    background: var(--color-accent);
    margin-top: 16px;
}

/* ========================================
   首页 Hero
   ======================================== */
.hero {
    background: var(--color-primary);
    min-height: calc(100vh - var(--header-height));
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(200,164,92,0.06) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 20%, rgba(200,164,92,0.04) 0%, transparent 50%);
}

.hero-content {
    position: relative;
    z-index: 1;
    padding: 40px 24px;
}

.hero-company {
    font-size: 14px;
    color: var(--color-accent);
    letter-spacing: 6px;
    text-transform: uppercase;
    margin-bottom: 24px;
    font-weight: 500;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 8px;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-desc {
    font-size: 16px;
    color: rgba(255,255,255,0.45);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.8;
    letter-spacing: 1px;
}

.hero-line {
    width: 60px;
    height: 2px;
    background: var(--color-accent);
    margin: 32px auto 0;
}

/* ========================================
   首页公告摘要
   ======================================== */
.home-announcements {
    background: var(--color-bg-white);
}

.announcement-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 20px 0;
    border-bottom: 1px solid var(--color-border-light);
    transition: padding-left var(--transition);
}

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

.announcement-item:hover {
    padding-left: 12px;
}

.announcement-item a {
    flex: 1;
}

.announcement-item .title {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 4px;
    transition: color var(--transition);
}

.announcement-item:hover .title {
    color: var(--color-accent);
}

.announcement-item .date {
    font-size: 13px;
    color: var(--color-text-muted);
    white-space: nowrap;
    margin-left: 24px;
}

/* ========================================
   首页项目推荐
   ======================================== */
.project-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.project-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.project-card .card-image {
    width: 100%;
    height: 200px;
    background: var(--color-border-light);
    overflow: hidden;
}

.project-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.project-card:hover .card-image img {
    transform: scale(1.05);
}

.project-card .card-body {
    padding: 20px;
}

.project-card .card-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.project-card .card-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ========================================
   通用卡片
   ======================================== */
.card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.card.visible {
    opacity: 1;
    transform: translateY(0);
}

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

/* ========================================
   公告列表
   ======================================== */
.announcement-list {
    max-width: 800px;
    margin: 0 auto;
}

.announcement-list .announcement-item {
    padding: 24px 0;
}

.announcement-list .announcement-item .title {
    font-size: 18px;
}

.announcement-list .announcement-item .summary {
    font-size: 14px;
    color: var(--color-text-light);
    margin-top: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 公告详情 */
.detail-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 48px 24px;
}

.detail-page .detail-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 12px;
    letter-spacing: 1px;
}

.detail-page .detail-meta {
    font-size: 14px;
    color: var(--color-text-muted);
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--color-border);
}

.detail-page .detail-content {
    font-size: 16px;
    line-height: 1.9;
    color: var(--color-text);
}

.detail-page .detail-content p {
    margin-bottom: 16px;
}

.detail-page .detail-content img {
    border-radius: var(--radius);
    margin: 16px 0;
}

.detail-back {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--color-text-light);
    margin-bottom: 24px;
    transition: color var(--transition);
}

.detail-back:hover {
    color: var(--color-accent);
}

/* ========================================
   公司人员
   ======================================== */
.staff-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.staff-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.staff-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.staff-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.staff-card .staff-photo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin: 0 auto 16px;
    background: var(--color-border-light);
    overflow: hidden;
    border: 3px solid var(--color-border);
}

.staff-card .staff-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.staff-card .staff-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
}

.staff-card .staff-position {
    font-size: 13px;
    color: var(--color-accent);
    letter-spacing: 1px;
}

.staff-card .staff-desc {
    font-size: 14px;
    color: var(--color-text-light);
    margin-top: 12px;
    line-height: 1.6;
}

/* ========================================
   关于我们
   ======================================== */
.about-section {
    padding: 48px 0;
    border-bottom: 1px solid var(--color-border-light);
}

.about-section:last-child {
    border-bottom: none;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.about-text h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.about-text p {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 12px;
}

.about-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-border-light);
    aspect-ratio: 4/3;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 联系信息 */
.contact-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--color-bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.contact-item .material-icons {
    color: var(--color-accent);
    font-size: 22px;
    margin-top: 2px;
}

.contact-item .contact-label {
    font-size: 12px;
    color: var(--color-text-muted);
    margin-bottom: 2px;
}

.contact-item .contact-value {
    font-size: 15px;
    color: var(--color-text);
    font-weight: 500;
}

/* ========================================
   发展历程 - 时间轴
   ======================================== */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 0 40px 48px;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.timeline-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
    padding-right: 48px;
}

.timeline-item:nth-child(even) {
    left: 50%;
    padding-left: 48px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    top: 8px;
    width: 14px;
    height: 14px;
    background: var(--color-accent);
    border: 3px solid var(--color-bg);
    border-radius: 50%;
    z-index: 1;
}

.timeline-item:nth-child(odd)::before {
    right: -7px;
}

.timeline-item:nth-child(even)::before {
    left: -7px;
}

.timeline-year {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.timeline-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.7;
}

.timeline-image {
    margin-top: 12px;
    border-radius: var(--radius);
    overflow: hidden;
}

.timeline-image img {
    width: 100%;
    border-radius: var(--radius);
}

/* ========================================
   艺术发展 / 备案信息 / 知识产权
   ======================================== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.info-card {
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform var(--transition), box-shadow var(--transition);
    opacity: 0;
    transform: translateY(20px);
}

.info-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.info-card .card-image {
    width: 100%;
    height: 200px;
    background: var(--color-border-light);
    overflow: hidden;
}

.info-card .card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.info-card .card-body {
    padding: 20px;
}

.info-card .card-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.info-card .card-meta {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.info-card .card-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.info-card .card-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(200,164,92,0.1);
    color: var(--color-accent);
    font-size: 12px;
    border-radius: 3px;
    margin-top: 8px;
    letter-spacing: 0.5px;
}

/* ========================================
   分页
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--color-text);
    transition: all var(--transition);
}

.pagination a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.pagination .active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

.pagination .disabled {
    opacity: 0.4;
    pointer-events: none;
}

/* ========================================
   空状态
   ======================================== */
.empty-state {
    text-align: center;
    padding: 80px 24px;
    color: var(--color-text-muted);
}

.empty-state .material-icons {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.4;
}

.empty-state p {
    font-size: 15px;
}

/* ========================================
   页脚
   ======================================== */
.site-footer {
    background: var(--color-primary);
    padding: 40px 24px;
}

.footer-container {
    max-width: var(--max-width);
    margin: 0 auto;
    text-align: center;
}

.footer-company {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.footer-copyright {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
    letter-spacing: 1px;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
    .project-grid,
    .info-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .staff-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-primary);
        flex-direction: column;
        padding: 24px;
        gap: 0;
        transform: translateX(100%);
        transition: transform var(--transition);
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .nav-menu a {
        padding: 14px 0;
        font-size: 16px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

    .hero-title {
        font-size: 28px;
        letter-spacing: 4px;
    }

    .hero-desc {
        font-size: 14px;
    }

    .page-banner h1 {
        font-size: 26px;
    }

    .section-title {
        font-size: 22px;
    }

    .project-grid,
    .info-grid,
    .staff-grid {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

    /* 时间轴移动端单侧 */
    .timeline::before {
        left: 20px;
    }

    .timeline-item,
    .timeline-item:nth-child(odd),
    .timeline-item:nth-child(even) {
        width: 100%;
        left: 0;
        text-align: left;
        padding-left: 52px;
        padding-right: 0;
    }

    .timeline-item::before,
    .timeline-item:nth-child(odd)::before,
    .timeline-item:nth-child(even)::before {
        left: 13px;
        right: auto;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 22px;
    }

    .detail-page .detail-title {
        font-size: 22px;
    }
}