/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #C41A1A;
    --primary-dark: #9B1515;
    --secondary: #D4A843;
    --dark-bg: #1A1A2E;
    --text-dark: #333;
    --text-medium: #666;
    --text-light: #999;
    --bg-light: #F5F5F5;
    --white: #fff;
    --success: #22C55E;
    --warning: #EAB308;
    --orange: #F97316;
    --danger: #EF4444;
    --border: #e5e5e5;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--text-dark);
    background: var(--bg-light);
    line-height: 1.6;
    font-size: 14px;
    padding-bottom: 70px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s;
}

ul, ol {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 导航栏（PC端顶部） ===== */
.navbar {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-logo .logo-icon {
    width: 44px;
    height: 44px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    font-weight: bold;
}

.nav-logo .logo-text {
    font-size: 18px;
    font-weight: bold;
    color: var(--text-dark);
}

.nav-links {
    display: flex;
    gap: 8px;
}

.nav-links a {
    padding: 10px 18px;
    font-size: 15px;
    color: var(--text-medium);
    border-radius: 6px;
    transition: all 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
    background: rgba(196, 26, 26, 0.08);
}

.nav-login-btn {
    background: var(--primary) !important;
    color: var(--white) !important;
    border-radius: 20px !important;
    padding: 8px 20px !important;
    font-weight: 500;
}

.nav-login-btn:hover {
    background: var(--primary-dark) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(196, 26, 26, 0.3);
}

.nav-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-dark);
}

/* ===== 底部Tab栏 ===== */
.bottom-tabbar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--white);
    border-top: 1px solid var(--border);
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
}

.bottom-tabbar .tabbar-inner {
    display: flex;
    justify-content: space-around;
    align-items: center;
    height: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.bottom-tabbar .tab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
    text-decoration: none;
    color: var(--text-light);
    font-size: 11px;
    transition: color 0.2s;
    padding: 4px 8px;
}

.bottom-tabbar .tab-item i {
    font-size: 22px;
    color: var(--text-light);
    transition: color 0.2s;
}

.bottom-tabbar .tab-item.active {
    color: var(--primary);
}

.bottom-tabbar .tab-item.active i {
    color: var(--primary);
}

.bottom-tabbar .tab-item.tab-login {
    color: var(--secondary);
}

.bottom-tabbar .tab-item.tab-login i {
    color: var(--secondary);
    font-size: 20px;
}

/* ===== Hero Banner ===== */
.hero {
    height: 560px;
    background: linear-gradient(135deg, var(--dark-bg) 0%, #2d1b1b 50%, var(--primary) 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    overflow: hidden;
}

.hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeInUp 1s ease;
}

.hero h1 {
    font-size: 56px;
    margin-bottom: 20px;
    letter-spacing: 4px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero .subtitle {
    font-size: 22px;
    color: var(--secondary);
    margin-bottom: 40px;
    letter-spacing: 2px;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    text-align: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(196, 26, 26, 0.3);
}

.btn-gold {
    background: var(--secondary);
    color: var(--white);
}

.btn-gold:hover {
    background: #c49833;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--white);
    color: var(--white);
}

.btn-outline:hover {
    background: var(--white);
    color: var(--primary);
}

.btn-sm {
    padding: 8px 20px;
    font-size: 14px;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 通用 Section ===== */
.section {
    padding: 80px 0;
}

.section-white {
    background: var(--white);
}

.section-gray {
    background: var(--bg-light);
}

.section-dark {
    background: var(--dark-bg);
    color: var(--white);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    color: var(--text-dark);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-dark .section-header h2 {
    color: var(--white);
}

.section-header h2::after {
    content: "";
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.section-header .subtitle {
    color: var(--text-light);
    font-size: 16px;
    margin-top: 24px;
}

.section-dark .section-header .subtitle {
    color: rgba(255, 255, 255, 0.6);
}

/* ===== 简介区 ===== */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-intro .intro-image {
    height: 380px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 80px;
    position: relative;
    overflow: hidden;
}

.about-intro .intro-image::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.about-intro .intro-image i {
    position: relative;
    z-index: 2;
}

.about-intro .intro-text h3 {
    font-size: 28px;
    color: var(--text-dark);
    margin-bottom: 20px;
}

.about-intro .intro-text p {
    color: var(--text-medium);
    font-size: 15px;
    line-height: 2;
    margin-bottom: 16px;
}

/* ===== 数据统计条 ===== */
.stats-bar {
    padding: 60px 0;
    background: var(--dark-bg);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}

.stat-item {
    color: var(--white);
}

.stat-item .stat-number {
    font-size: 48px;
    font-weight: bold;
    color: var(--secondary);
    margin-bottom: 8px;
}

.stat-item .stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 卡片网格 ===== */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card-grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.card-grid-6 {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

/* ===== 会员卡片 ===== */
.member-card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px 20px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.member-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.member-card .member-logo {
    width: 80px;
    height: 80px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 28px;
    font-weight: bold;
}

.member-card .member-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.member-card .member-industry {
    font-size: 13px;
    color: var(--text-light);
    padding: 4px 12px;
    background: var(--bg-light);
    border-radius: 20px;
    display: inline-block;
}

/* ===== 活动卡片 ===== */
.activity-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.activity-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.activity-card .activity-cover {
    height: 200px;
    background: linear-gradient(135deg, var(--dark-bg), var(--primary));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 48px;
}

.activity-card .activity-status {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    color: var(--white);
    background: var(--success);
}

.activity-card .activity-status.ongoing { background: var(--success); }
.activity-card .activity-status.upcoming { background: var(--primary); }
.activity-card .activity-status.ended { background: var(--text-light); }

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

.activity-card .activity-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.activity-card .activity-meta {
    display: flex;
    gap: 16px;
    color: var(--text-light);
    font-size: 13px;
}

.activity-card .activity-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ===== 新闻列表 ===== */
.news-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.news-item {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 24px;
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.news-item:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.news-item .news-cover {
    height: 100%;
    min-height: 160px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 40px;
}

.news-item .news-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.news-item .news-category {
    display: inline-block;
    padding: 2px 10px;
    background: rgba(196, 26, 26, 0.1);
    color: var(--primary);
    font-size: 12px;
    border-radius: 4px;
    margin-bottom: 12px;
    width: fit-content;
}

.news-item .news-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.news-item .news-desc {
    color: var(--text-medium);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-item .news-meta {
    color: var(--text-light);
    font-size: 13px;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-bg);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--secondary);
}

.footer-col p,
.footer-col a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    line-height: 2;
}

.footer-col a:hover {
    color: var(--secondary);
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-brand .logo-icon {
    width: 44px;
    height: 44px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 20px;
    font-weight: bold;
}

.footer-brand .logo-text {
    font-size: 18px;
    font-weight: bold;
    color: var(--white);
}

.footer-qrcode {
    width: 100px;
    height: 100px;
    background: var(--white);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 12px;
    text-align: center;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 13px;
}

/* ===== 页面 Banner ===== */
.page-banner {
    height: 300px;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--primary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
}

.page-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.page-banner .container {
    position: relative;
    z-index: 2;
}

.page-banner h1 {
    font-size: 40px;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.page-banner p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
}

.breadcrumb {
    margin-top: 16px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.breadcrumb a:hover {
    color: var(--secondary);
}

/* ===== 时间轴 ===== */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px 0;
}

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

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.timeline-item:nth-child(odd) .timeline-content {
    grid-column: 1;
    text-align: right;
}

.timeline-item:nth-child(even) .timeline-content {
    grid-column: 2;
}

.timeline-item::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 8px;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: var(--primary);
    border: 3px solid var(--white);
    border-radius: 50%;
    z-index: 2;
    box-shadow: 0 0 0 2px var(--primary);
}

.timeline-content {
    background: var(--white);
    padding: 20px 24px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.timeline-content .year {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 8px;
}

.timeline-content h4 {
    font-size: 16px;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.timeline-content p {
    color: var(--text-medium);
    font-size: 14px;
    line-height: 1.7;
}

/* ===== 组织架构 ===== */
.org-chart {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.org-level {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    position: relative;
}

.org-level:not(:last-child)::after {
    content: "";
    position: absolute;
    bottom: -15px;
    left: 50%;
    width: 2px;
    height: 15px;
    background: var(--border);
}

.org-node {
    background: var(--white);
    border: 2px solid var(--primary);
    border-radius: 12px;
    padding: 16px 24px;
    text-align: center;
    min-width: 160px;
    box-shadow: 0 4px 12px rgba(196, 26, 26, 0.1);
}

.org-node .role {
    font-size: 14px;
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 6px;
}

.org-node .name {
    font-size: 15px;
    color: var(--text-dark);
    font-weight: 500;
}

.org-node .company {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

/* ===== 荣誉资质 ===== */
.honor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.honor-item {
    background: var(--white);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.honor-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.honor-item .honor-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: linear-gradient(135deg, var(--secondary), var(--primary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 28px;
}

.honor-item .honor-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.honor-item .honor-year {
    font-size: 13px;
    color: var(--text-light);
}

/* ===== 搜索筛选栏 ===== */
.filter-bar {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 30px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.filter-bar .search-box {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.filter-bar .search-box input {
    width: 100%;
    padding: 12px 16px 12px 44px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
}

.filter-bar .search-box input:focus {
    border-color: var(--primary);
}

.filter-bar .search-box i {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.filter-bar select {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-dark);
    background: var(--white);
    cursor: pointer;
    outline: none;
}

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

.pagination a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--white);
    color: var(--text-medium);
    font-size: 14px;
    transition: all 0.3s;
}

.pagination a:hover,
.pagination a.active {
    background: var(--primary);
    color: var(--white);
}

/* ===== Tab 分类 ===== */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 30px;
    border-bottom: 2px solid var(--border);
    padding-bottom: 0;
    flex-wrap: wrap;
}

.tabs .tab-item {
    padding: 12px 24px;
    cursor: pointer;
    color: var(--text-medium);
    font-size: 15px;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all 0.3s;
}

.tabs .tab-item:hover,
.tabs .tab-item.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ===== 供需平台 ===== */
.supply-demand {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.sd-section {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.sd-section h3 {
    font-size: 20px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--bg-light);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sd-section.supply h3 { color: var(--success); }
.sd-section.demand h3 { color: var(--primary); }

.sd-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.sd-item {
    padding: 16px;
    background: var(--bg-light);
    border-radius: 8px;
    transition: all 0.3s;
}

.sd-item:hover {
    background: #eee;
}

.sd-item .sd-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 8px;
}

.sd-item .sd-meta {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-light);
}

/* ===== 联系页面 ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.contact-info-item .icon {
    width: 48px;
    height: 48px;
    background: rgba(196, 26, 26, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-info-item .info h4 {
    font-size: 16px;
    color: var(--text-dark);
    margin-bottom: 6px;
}

.contact-info-item .info p {
    color: var(--text-medium);
    font-size: 14px;
    line-height: 1.6;
}

.map-placeholder {
    height: 320px;
    background: linear-gradient(135deg, #e5e5e5, #f5f5f5);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 16px;
    margin-bottom: 30px;
}

.contact-form {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}

.contact-form h3 {
    font-size: 20px;
    margin-bottom: 24px;
    color: var(--text-dark);
}

.form-group {
    margin-bottom: 20px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--primary);
}

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

/* ===== 品牌活动专区 ===== */
.brand-activities {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.brand-activity {
    position: relative;
    height: 280px;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
}

.brand-activity .ba-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 80px;
    color: rgba(255, 255, 255, 0.2);
    transition: transform 0.5s;
}

.brand-activity:hover .ba-bg {
    transform: scale(1.1);
}

.brand-activity .ba-content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: var(--white);
}

.brand-activity .ba-content h3 {
    font-size: 24px;
    margin-bottom: 8px;
}

.brand-activity .ba-content p {
    font-size: 14px;
    opacity: 0.8;
}

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .card-grid,
    .card-grid-4,
    .honor-grid,
    .about-intro,
    .supply-demand,
    .contact-grid,
    .brand-activities {
        grid-template-columns: 1fr 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .card-grid-6 {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 30px;
    }
    
    .hero h1 {
        font-size: 40px;
    }
    
    .hero .subtitle {
        font-size: 18px;
    }
}

@media (max-width: 768px) {
    /* 移动端隐藏顶部导航 */
    .navbar {
        display: none;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.open {
        display: flex;
    }
    
    .nav-links a {
        padding: 12px;
        border-bottom: 1px solid var(--bg-light);
    }
    
    .nav-toggle {
        display: block;
    }
    
    .hero {
        height: 420px;
    }
    
    .hero h1 {
        font-size: 32px;
    }
    
    .hero .subtitle {
        font-size: 16px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-header h2 {
        font-size: 28px;
    }
    
    .card-grid,
    .card-grid-4,
    .card-grid-6,
    .about-intro,
    .supply-demand,
    .contact-grid,
    .brand-activities,
    .honor-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-item .stat-number {
        font-size: 32px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .news-item {
        grid-template-columns: 1fr;
    }
    
    .news-item .news-cover {
        min-height: 200px;
    }
    
    .page-banner {
        height: 220px;
    }
    
    .page-banner h1 {
        font-size: 28px;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item {
        grid-template-columns: 1fr;
        padding-left: 50px;
    }
    
    .timeline-item .timeline-content,
    .timeline-item:nth-child(odd) .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        grid-column: 1;
        text-align: left;
    }
    
    .timeline-item::before {
        left: 20px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 26px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-item .stat-number {
        font-size: 28px;
    }
}

/* ===== 滚动动画 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}