/* ========================================
   爱普科特 - 科技蓝色系专业风格
   ======================================== */

/* CSS变量定义 - 华为/淘宝蓝色系 */
:root {
    /* 主色系 - 华为蓝 */
    --primary-dark: #003081;
    --primary-color: #0050a4;
    --primary-light: #0070d4;
    --primary-lighter: #00a0e9;
    
    /* 辅助色 - 浅蓝灰 */
    --secondary-dark: #1a1a1a;
    --secondary-color: #333333;
    --secondary-light: #666666;
    
    /* 强调色 - 橙色点缀 */
    --accent-color: #ff6600;
    --accent-light: #ff8533;
    
    /* 成功色 */
    --success-color: #00b140;
    --success-light: #00cc4a;
    
    /* 中性色 */
    --gray-900: #1f1f1f;
    --gray-700: #3d3d3d;
    --gray-500: #5c5c5c;
    --gray-400: #8c8c8c;
    --gray-300: #b3b3b3;
    --gray-200: #d9d9d9;
    --gray-100: #f5f5f5;
    --white: #ffffff;
    
    /* 文字颜色 */
    --text-primary: #1a1a1a;
    --text-secondary: #4d4d4d;
    --text-muted: #999999;
    
    /* 边框 */
    --border-color: #e8e8e8;
    --border-light: #f0f0f0;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(90deg, var(--primary-dark) 0%, var(--primary-light) 100%);
    --gradient-hero: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 50%, var(--primary-light) 100%);
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 48, 129, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 48, 129, 0.1);
    --shadow-lg: 0 8px 30px rgba(0, 48, 129, 0.12);
    
    /* 过渡 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    
    /* 容器宽度 */
    --max-width: 1200px;
    --header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-primary);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
}

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

ul, ol {
    list-style: none;
}

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

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    outline: none;
    border: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   顶部信息栏
   ======================================== */
.top-bar {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.85);
    padding: 8px 0;
    font-size: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: rgba(255,255,255,0.9);
}

.top-bar a:hover {
    color: var(--white);
}

.top-bar-right span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

/* ========================================
   页头
   ======================================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

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

.logo-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-base);
}

.logo-icon:hover {
    transform: scale(1.05);
}

.logo-icon img {
    width: 100%;
    height: 100%;
}

.logo-text h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-dark);
    letter-spacing: 1px;
}

.logo-text p {
    font-size: 11px;
    color: var(--text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* 导航 */
.nav-list {
    display: flex;
    align-items: center;
    gap: 2px;
}

.nav-item a {
    display: block;
    padding: 8px 16px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.nav-item a:hover {
    color: var(--primary-color);
    background: rgba(0, 80, 164, 0.05);
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    padding: 8px;
    background: rgba(0, 80, 164, 0.05);
    border-radius: var(--radius-md);
    cursor: pointer;
}

.menu-toggle span {
    width: 20px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 1px;
}

/* ========================================
   Banner
   ======================================== */
.banner {
    position: relative;
    height: 480px;
    overflow: hidden;
}

.banner-slider {
    display: flex;
    height: 100%;
    transition: transform 0.5s ease;
}

.banner-slide {
    min-width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    position: relative;
}

.banner-slide:nth-child(1) {
    background: linear-gradient(135deg, #003081 0%, #0050a4 40%, #0070d4 100%);
}

.banner-slide:nth-child(2) {
    background: linear-gradient(135deg, #004578 0%, #0066b8 40%, #0088d8 100%);
}

.banner-slide:nth-child(3) {
    background: linear-gradient(135deg, #002060 0%, #004090 40%, #0060c0 100%);
}

/* 科技网格背景 */
.banner-slide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.banner-slide .container {
    position: relative;
    z-index: 1;
    max-width: 750px;
}

.banner-slide h2 {
    font-size: 40px;
    font-weight: 600;
    margin-bottom: 18px;
    letter-spacing: 3px;
    animation: fadeInUp 0.6s ease;
}

.banner-slide p {
    font-size: 17px;
    line-height: 1.8;
    max-width: 580px;
    margin: 0 auto 32px;
    opacity: 0.9;
    animation: fadeInUp 0.6s ease 0.1s both;
}

.banner-slide .btn {
    animation: fadeInUp 0.6s ease 0.2s both;
}

.banner-controls {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.banner-dot {
    width: 8px;
    height: 8px;
    background: rgba(255,255,255,0.4);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-fast);
}

.banner-dot:hover {
    background: rgba(255,255,255,0.7);
}

.banner-dot.active {
    width: 24px;
    border-radius: 4px;
    background: var(--white);
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition-fast);
    border: 1px solid rgba(255,255,255,0.2);
}

.banner-arrow:hover {
    background: rgba(255,255,255,0.2);
}

.banner-arrow svg {
    width: 20px;
    height: 20px;
    fill: var(--white);
}

.banner-arrow.prev { left: 20px; }
.banner-arrow.next { right: 20px; }

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

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-block;
    padding: 12px 28px;
    background: var(--accent-color);
    color: var(--white);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
}

.btn:hover {
    background: var(--accent-light);
    color: var(--white);
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--white);
}

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

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

.btn-primary:hover {
    background: var(--primary-light);
}

/* ========================================
   页面标题
   ======================================== */
.page-header {
    background: var(--gradient-hero);
    color: var(--white);
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.page-header p {
    font-size: 15px;
    opacity: 0.85;
}

.breadcrumb {
    margin-top: 16px;
    font-size: 13px;
    opacity: 0.75;
}

.breadcrumb a:hover {
    opacity: 1;
    text-decoration: underline;
}

/* ========================================
   服务区域
   ======================================== */
.services-section {
    padding: 80px 0;
    background: var(--gray-100);
}

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

.section-title h2 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 12px;
    font-weight: 600;
}

.section-title p {
    color: var(--text-muted);
    font-size: 14px;
}

.section-title::after {
    content: '';
    display: block;
    width: 50px;
    height: 3px;
    background: var(--primary-color);
    margin: 16px auto 0;
    border-radius: 2px;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.service-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.service-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, rgba(0, 80, 164, 0.08), rgba(0, 112, 212, 0.04));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-base);
}

.service-card:hover .service-icon {
    background: var(--primary-color);
}

.service-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--primary-color);
    transition: var(--transition-base);
}

.service-card:hover .service-icon svg {
    fill: var(--white);
}

.service-card h3 {
    font-size: 17px;
    color: var(--text-primary);
    margin-bottom: 10px;
    font-weight: 600;
}

.service-card p {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.7;
    margin-bottom: 16px;
}

.service-card .btn-link {
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.service-card .btn-link:hover {
    color: var(--accent-color);
    gap: 8px;
}

/* ========================================
   关于我们
   ======================================== */
.about-preview {
    padding: 80px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 28px;
    color: var(--text-primary);
    margin-bottom: 20px;
    font-weight: 600;
}

.about-text p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: 32px;
}

.stat-item {
    text-align: center;
    padding: 20px 12px;
    background: var(--gray-100);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
}

.stat-item:hover {
    background: var(--white);
    box-shadow: var(--shadow-md);
}

.stat-item .number {
    font-size: 32px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-item .label {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 6px;
}

.about-image {
    position: relative;
}

.about-image > div {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
    height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-image > div svg {
    width: 80px;
    height: 80px;
    fill: rgba(255,255,255,0.3);
}

/* ========================================
   新闻
   ======================================== */
.news-section {
    padding: 80px 0;
    background: var(--gray-100);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.news-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid var(--border-color);
}

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

.news-image {
    height: 160px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
}

.news-image svg {
    width: 50px;
    height: 50px;
    fill: rgba(255,255,255,0.3);
}

.news-content {
    padding: 20px;
}

.news-date {
    color: var(--primary-color);
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 8px;
}

.news-card h3 {
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-weight: 600;
    line-height: 1.5;
}

.news-card p {
    color: var(--text-muted);
    font-size: 13px;
    line-height: 1.6;
}

/* ========================================
   合作伙伴
   ======================================== */
.partners-section {
    padding: 50px 0;
}

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

.partner-item {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    height: 60px;
    background: var(--white);
    border-radius: var(--radius-md);
    padding: 12px 20px;
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.partner-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.partner-item span {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background: var(--gray-900);
    color: rgba(255,255,255,0.7);
    padding-top: 60px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-about h3 {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 16px;
    font-weight: 600;
}

.footer-about p {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    line-height: 1.8;
}

.footer-links h4 {
    font-size: 15px;
    color: var(--white);
    margin-bottom: 18px;
    font-weight: 600;
}

.footer-links ul li {
    margin-bottom: 10px;
}

.footer-links ul li a {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
}

.footer-links ul li a:hover {
    color: var(--white);
}

.footer-contact p {
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact p svg {
    width: 16px;
    height: 16px;
    fill: var(--primary-lighter);
    flex-shrink: 0;
}

.footer-bottom {
    padding: 20px 0;
    text-align: center;
    font-size: 12px;
    color: rgba(255,255,255,0.4);
}

.footer-bottom a {
    color: rgba(255,255,255,0.5);
}

.footer-bottom a:hover {
    color: var(--white);
}

/* ========================================
   内容页
   ======================================== */
.content-section {
    padding: 50px 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 30px;
}

.sidebar {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 20px;
    height: fit-content;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.sidebar-title {
    font-size: 15px;
    color: var(--white);
    margin-bottom: 16px;
    padding: 12px 16px;
    background: var(--primary-color);
    border-radius: var(--radius-md);
    font-weight: 600;
}

.sidebar-menu a {
    display: block;
    padding: 10px 14px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius-md);
    margin-bottom: 4px;
    transition: var(--transition-fast);
}

.sidebar-menu a:hover {
    background: rgba(0, 80, 164, 0.06);
    color: var(--primary-color);
}

.sidebar-menu a.active {
    background: var(--primary-color);
    color: var(--white);
}

.main-content {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.main-content h2 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 2px solid var(--primary-color);
    font-weight: 600;
}

.main-content h3 {
    font-size: 17px;
    color: var(--text-primary);
    margin: 28px 0 14px;
    font-weight: 600;
}

.main-content p {
    color: var(--text-secondary);
    line-height: 1.9;
    margin-bottom: 14px;
}

.main-content ul, .main-content ol {
    margin: 16px 0;
    padding-left: 24px;
}

.main-content li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.main-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    background: var(--primary-color);
    border-radius: 50%;
}

.main-content ol {
    counter-reset: item;
}

.main-content ol li::before {
    content: counter(item);
    counter-increment: item;
    position: absolute;
    left: 0;
    top: 2px;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* ========================================
   联系卡片
   ======================================== */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 32px 0;
}

.contact-card {
    background: var(--gray-100);
    padding: 24px 16px;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition-base);
    border: 1px solid transparent;
}

.contact-card:hover {
    background: var(--white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.contact-card h4 {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 10px;
    font-weight: 500;
}

.contact-card p {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-color);
}

/* ========================================
   时间线
   ======================================== */
.timeline {
    position: relative;
    padding: 36px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: calc(100% - 36px);
    background: var(--primary-color);
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
    display: flex;
}

.timeline-item:nth-child(odd) {
    flex-direction: row-reverse;
}

.timeline-content {
    width: calc(50% - 30px);
    background: var(--white);
    padding: 20px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.timeline-content h4 {
    color: var(--primary-color);
    font-size: 16px;
    margin-bottom: 10px;
    font-weight: 600;
}

.timeline-content p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.6;
}

.timeline-date {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-color);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 13px;
}

/* ========================================
   FAQ
   ======================================== */
.faq-list {
    margin: 28px 0;
}

.faq-item {
    margin-bottom: 12px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    background: var(--white);
}

.faq-question {
    background: var(--primary-color);
    color: var(--white);
    padding: 16px 20px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    font-weight: 500;
}

.faq-question::after {
    content: '+';
    font-size: 20px;
    font-weight: 300;
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    background: var(--white);
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 20px;
    max-height: 300px;
}

.faq-answer p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 12px;
}

/* ========================================
   表格
   ======================================== */
.table-responsive {
    overflow-x: auto;
    margin: 28px 0;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th {
    background: var(--primary-color);
    color: var(--white);
    padding: 14px 18px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
}

table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-color);
    font-size: 13px;
    color: var(--text-secondary);
}

table tr:last-child td {
    border-bottom: none;
}

table tr:hover {
    background: var(--gray-100);
}

/* ========================================
   表单
   ======================================== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 13px;
}

.form-control {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    transition: var(--transition-fast);
    background: var(--white);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 80, 164, 0.1);
}

.form-control::placeholder {
    color: var(--text-muted);
}

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

/* ========================================
   业务流程
   ======================================== */
.process-steps {
    display: flex;
    justify-content: space-between;
    margin: 48px 0;
    position: relative;
}

.process-steps::before {
    content: '';
    position: absolute;
    top: 32px;
    left: 15%;
    right: 15%;
    height: 2px;
    background: var(--primary-color);
}

.process-step {
    text-align: center;
    flex: 1;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0, 80, 164, 0.3);
    transition: var(--transition-base);
}

.process-step:hover .step-number {
    transform: scale(1.1);
    background: var(--primary-light);
}

.process-step h4 {
    font-size: 15px;
    color: var(--text-primary);
    margin-bottom: 6px;
    font-weight: 600;
}

.process-step p {
    font-size: 12px;
    color: var(--text-muted);
    max-width: 120px;
    margin: 0 auto;
}

/* ========================================
   团队
   ======================================== */
.team-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin: 32px 0;
}

.team-member {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition-base);
}

.team-member:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.member-photo {
    width: 100px;
    height: 100px;
    margin: 28px auto 20px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.member-photo svg {
    width: 55px;
    height: 55px;
    fill: var(--white);
}

.member-info {
    padding: 0 20px 24px;
}

.member-info h4 {
    font-size: 17px;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-weight: 600;
}

.member-info .position {
    color: var(--primary-color);
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 12px;
}

.member-info p {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ========================================
   返回顶部
   ======================================== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-base);
    z-index: 999;
    box-shadow: var(--shadow-md);
    border: none;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--primary-light);
    transform: translateY(-3px);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    fill: var(--white);
}

/* ========================================
   协议
   ======================================== */
.agreement-content {
    background: var(--white);
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.agreement-content h3 {
    color: var(--primary-color);
    margin-top: 28px;
    margin-bottom: 14px;
    font-size: 16px;
    font-weight: 600;
    padding-left: 12px;
    border-left: 3px solid var(--accent-color);
}

/* ========================================
   提示
   ======================================== */
.alert {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    margin-bottom: 16px;
    font-size: 13px;
}

.alert-success {
    background: #e6f7ed;
    color: #0d7a36;
    border: 1px solid #b3e5c9;
}

.alert-error {
    background: #feebee;
    color: #c62828;
    border: 1px solid #ffcdd2;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
    .services-grid,
    .news-grid,
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: auto;
    }
    
    .top-bar .container {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
    
    .header-content {
        flex-direction: column;
        gap: 12px;
        padding: 12px 20px;
    }
    
    .logo {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-list {
        display: none;
        flex-direction: column;
        width: 100%;
        background: var(--white);
        box-shadow: var(--shadow-md);
        border-radius: var(--radius-md);
        padding: 8px;
    }
    
    .nav-list.show {
        display: flex;
    }
    
    .nav-item a {
        padding: 12px 16px;
        text-align: center;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .banner {
        height: 380px;
    }
    
    .banner-slide h2 {
        font-size: 26px;
    }
    
    .banner-slide p {
        font-size: 14px;
    }
    
    .banner-arrow {
        width: 36px;
        height: 36px;
    }
    
    .banner-arrow.prev { left: 10px; }
    .banner-arrow.next { right: 10px; }
    
    .services-section,
    .about-preview,
    .news-section {
        padding: 50px 0;
    }
    
    .section-title h2 {
        font-size: 22px;
    }
    
    .services-grid,
    .news-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        flex-direction: column;
        gap: 24px;
    }
    
    .process-steps::before {
        display: none;
    }
    
    .main-content {
        padding: 24px;
    }
    
    .main-content h2 {
        font-size: 20px;
    }
    
    .timeline::before {
        left: 20px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(odd) {
        flex-direction: row;
        padding-left: 50px;
    }
    
    .timeline-content {
        width: 100%;
    }
    
    .timeline-date {
        left: 20px;
        padding: 4px 12px;
        font-size: 11px;
    }
    
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

/* ========================================
   加载
   ======================================== */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 160px;
}

.loading::after {
    content: '';
    width: 40px;
    height: 40px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========================================
   分页
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 32px;
}

.pagination a {
    padding: 8px 14px;
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 13px;
    transition: var(--transition-fast);
}

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