/* ============================================
   出国（境）学习交流项目展示系统 - 主样式表
   ============================================ */

/* CSS变量 - 统一管理颜色主题 */
:root {
    --primary: #1a365d;
    --primary-light: #2b6cb0;
    --primary-dark: #0f2440;
    --accent: #3182ce;
    --accent-light: #63b3ed;
    --success: #38a169;
    --warning: #d69e2e;
    --danger: #e53e3e;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
}

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

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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

a:hover {
    color: var(--primary-light);
}

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

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

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(26, 54, 93, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(26, 54, 93, 0.98);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
}

.nav-logo i {
    font-size: 1.5rem;
    color: var(--accent-light);
}

.nav-menu {
    display: flex;
    align-items: center;
    list-style: none;
    gap: 5px;
}

.nav-link {
    color: rgba(255,255,255,0.85);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 5px;
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    background: rgba(255,255,255,0.1);
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .nav-link {
    cursor: pointer;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 180px;
    padding: 8px 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
}

.dropdown-menu a:hover {
    background: var(--bg-secondary);
    color: var(--accent);
    padding-left: 24px;
}

/* 移动端菜单按钮 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}

/* ============================================
   Hero区域
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--accent) 100%);
    color: #fff;
    text-align: center;
    padding: 120px 20px 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 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");
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    border: 1px solid rgba(255,255,255,0.3);
    padding: 8px 24px;
    border-radius: 50px;
    font-size: 0.9rem;
    margin-bottom: 24px;
    backdrop-filter: blur(5px);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 900;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: 1px;
}

.hero h2 {
    font-size: 1.3rem;
    font-weight: 300;
    opacity: 0.9;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: transparent;
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.5);
}

.btn-outline:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
    color: #fff;
}

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

.btn-accent:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    color: #fff;
}

.btn-sm {
    padding: 8px 18px;
    font-size: 0.9rem;
}

/* ============================================
   通用区块样式
   ============================================ */
.section {
    padding: 80px 0;
}

.section-alt {
    background: var(--bg-primary);
}

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

.section-header h2 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 12px;
    font-weight: 700;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 600px;
    margin: 0 auto;
}

.section-divider {
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-light));
    margin: 16px auto;
    border-radius: 2px;
}

/* ============================================
   统计数据卡片
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 40px;
}

.stat-card {
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    backdrop-filter: blur(5px);
    transition: var(--transition);
}

.stat-card:hover {
    background: rgba(255,255,255,0.15);
    transform: translateY(-3px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.85;
}

/* ============================================
   卡片网格
   ============================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.card-grid-3 {
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
}

.card-grid-4 {
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}

.card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    transition: var(--transition);
}

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

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.card-icon.blue {
    background: rgba(49, 130, 206, 0.1);
    color: var(--accent);
}

.card-icon.green {
    background: rgba(56, 161, 105, 0.1);
    color: var(--success);
}

.card-icon.orange {
    background: rgba(214, 158, 46, 0.1);
    color: var(--warning);
}

.card-icon.red {
    background: rgba(229, 62, 62, 0.1);
    color: var(--danger);
}

.card-icon.purple {
    background: rgba(128, 90, 213, 0.1);
    color: #805ad5;
}

.card-icon.teal {
    background: rgba(0, 150, 136, 0.1);
    color: #009688;
}

.card-body {
    padding: 24px;
}

.card-body h3 {
    font-size: 1.15rem;
    color: var(--primary);
    margin-bottom: 8px;
}

.card-body .card-subtitle {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 12px;
    font-weight: 500;
}

.card-body p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================================
   成果标签
   ============================================ */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

.badge-national {
    background: rgba(229, 62, 62, 0.1);
    color: var(--danger);
}

.badge-provincial {
    background: rgba(49, 130, 206, 0.1);
    color: var(--accent);
}

.badge-school {
    background: rgba(56, 161, 105, 0.1);
    color: var(--success);
}

.badge-patent {
    background: rgba(128, 90, 213, 0.1);
    color: #805ad5;
}

.badge-competition {
    background: rgba(214, 158, 46, 0.1);
    color: var(--warning);
}

/* ============================================
   时间线
   ============================================ */
.timeline {
    position: relative;
    padding-left: 40px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.timeline-item {
    position: relative;
    padding-bottom: 30px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-primary);
    box-shadow: 0 0 0 2px var(--accent);
}

.timeline-item h4 {
    font-size: 1.05rem;
    color: var(--primary);
    margin-bottom: 6px;
}

.timeline-item p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   页面头部
   ============================================ */
.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 120px 20px 60px;
    text-align: center;
}

.page-header h1 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.page-header p {
    font-size: 1.05rem;
    opacity: 0.85;
}

/* ============================================
   筛选栏
   ============================================ */
.filter-bar {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 30px;
    padding: 16px 20px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.filter-btn {
    padding: 6px 18px;
    border: 1px solid var(--border-color);
    border-radius: 50px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* ============================================
   个人档案
   ============================================ */
.profile-header {
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 40px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 30px;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #fff;
    flex-shrink: 0;
}

.profile-info h1 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 8px;
}

.profile-info .profile-major {
    color: var(--accent);
    font-size: 1.1rem;
    margin-bottom: 12px;
}

.profile-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.profile-tag {
    padding: 4px 14px;
    background: var(--bg-tertiary);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* 技能标签云 */
.skill-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 16px;
}

.skill-tag {
    padding: 8px 18px;
    background: linear-gradient(135deg, rgba(49, 130, 206, 0.08), rgba(49, 130, 206, 0.15));
    border: 1px solid rgba(49, 130, 206, 0.2);
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--accent);
    transition: var(--transition);
}

.skill-tag:hover {
    background: var(--accent);
    color: #fff;
    transform: translateY(-2px);
}

/* ============================================
   学习计划步骤
   ============================================ */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    position: relative;
}

.step-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
}

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

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--primary-light));
    color: #fff;
    font-size: 1.3rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.step-card h3 {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 8px;
}

.step-card .step-subtitle {
    font-size: 0.85rem;
    color: var(--accent);
    margin-bottom: 12px;
    font-weight: 500;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.93rem;
}

/* ============================================
   参访卡片
   ============================================ */
.visit-card {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border-left: 4px solid var(--accent);
}

.visit-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.visit-card .visit-icon {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-sm);
    background: rgba(49, 130, 206, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.visit-card h3 {
    font-size: 1.05rem;
    color: var(--primary);
    margin-bottom: 6px;
}

.visit-card .visit-location {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 10px;
}

.visit-card p {
    color: var(--text-secondary);
    font-size: 0.93rem;
}

/* ============================================
   FAQ手风琴
   ============================================ */
.accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    margin-bottom: 12px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.accordion-header {
    padding: 18px 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-weight: 500;
    color: var(--primary);
    transition: var(--transition);
}

.accordion-header:hover {
    background: var(--bg-secondary);
}

.accordion-header i {
    transition: var(--transition);
    color: var(--accent);
}

.accordion-item.active .accordion-header i {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.accordion-content-inner {
    padding: 0 24px 18px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ============================================
   表格样式
   ============================================ */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.data-table thead {
    background: var(--primary);
    color: #fff;
}

.data-table th,
.data-table td {
    padding: 14px 18px;
    text-align: left;
    font-size: 0.93rem;
}

.data-table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.data-table tbody tr:hover {
    background: var(--bg-secondary);
}

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

.contact-info-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    margin-bottom: 16px;
}

.contact-info-card i {
    width: 45px;
    height: 45px;
    border-radius: var(--radius-sm);
    background: rgba(49, 130, 206, 0.1);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-primary);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(49, 130, 206, 0.1);
}

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

/* ============================================
   页脚
   ============================================ */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.8);
    padding: 50px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 30px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-col h3 {
    color: #fff;
    font-size: 1.05rem;
    margin-bottom: 16px;
}

.footer-col h3 i {
    color: var(--accent-light);
    margin-right: 6px;
}

.footer-col p {
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 8px;
}

.footer-col ul {
    list-style: none;
}

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

.footer-col ul a {
    color: rgba(255,255,255,0.7);
    font-size: 0.9rem;
    transition: var(--transition);
}

.footer-col ul a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.5);
}

/* ============================================
   404 / 500 错误页
   ============================================ */
.error-page {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px 20px;
}

.error-page h1 {
    font-size: 6rem;
    color: var(--accent);
    font-weight: 900;
}

.error-page h2 {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: 12px;
}

.error-page p {
    color: var(--text-secondary);
    margin-bottom: 24px;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* 滚动显示动画 */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }

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

    .profile-header {
        flex-direction: column;
        text-align: center;
    }

    .hero h1 {
        font-size: 2.2rem;
    }
}

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

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--primary);
        flex-direction: column;
        padding: 20px;
        gap: 5px;
        transform: translateY(-100%);
        opacity: 0;
        transition: var(--transition);
        pointer-events: none;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(255,255,255,0.05);
        border-radius: var(--radius-sm);
        margin-top: 5px;
        display: none;
    }

    .nav-dropdown.open .dropdown-menu {
        display: block;
    }

    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }

    .hero h1 {
        font-size: 1.8rem;
    }

    .hero h2 {
        font-size: 1.05rem;
    }

    .section {
        padding: 50px 0;
    }

    .section-header h2 {
        font-size: 1.6rem;
    }

    .card-grid,
    .card-grid-3,
    .card-grid-4 {
        grid-template-columns: 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-header {
        padding: 100px 20px 40px;
    }

    .page-header h1 {
        font-size: 1.6rem;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .filter-bar {
        flex-direction: column;
    }
}