:root {
    --brand: #2563EB;
    --brand-soft: rgba(37, 99, 235, 0.08);
    --brand-light: rgba(37, 99, 235, 0.04);
    --bg: #FFFFFF;
    --bg-subtle: #FAFAFA;
    --text: #0A0A0A;
    --text-secondary: #6B6B6B;
    --text-muted: #A3A3A3;
    --text-light: #9CA3AF;
    --border: rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Serif SC', serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.8;
    overflow-x: hidden;
}

::selection {
    background: var(--brand);
    color: white;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 4rem;
}

@media (max-width: 1024px) {
    .container {
        padding: 0 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1.25rem;
    }
}

/* Page Hero */
.page-hero {
    padding: 12rem 0 6rem;
    position: relative;
    background: var(--bg-subtle);
    overflow: hidden;
}

.page-hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(37, 99, 235, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black 20%, transparent 80%);
}

.page-hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.3;
}

.page-hero-glow-1 {
    top: -200px;
    right: -100px;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.4) 0%, transparent 70%);
}

.page-hero-glow-2 {
    bottom: -300px;
    left: -200px;
    background: radial-gradient(circle, rgba(79, 70, 229, 0.3) 0%, transparent 70%);
}

.page-hero-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.page-hero-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.3em;
    color: var(--brand);
    margin-bottom: 1.5rem;
    display: block;
    font-weight: 600;
}

.page-hero-title {
    font-family: 'Playfair Display', 'Noto Serif SC', serif;
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.page-hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Section Styles */
.section {
    padding: 5rem 0;
}

.section-header {
    margin-bottom: 3rem;
    text-align: center;
}

.section-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--brand);
    margin-bottom: 0.75rem;
    display: block;
    font-weight: 600;
}

.section-title {
    font-family: 'Playfair Display', 'Noto Serif SC', serif;
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
}

.section-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* Category Navigation */
.category-nav {
    background: white;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 73px;
    z-index: 100;
}

.category-nav-inner {
    display: flex;
    gap: 0;
    justify-content: center;
}

.category-tab {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}

.category-tab:hover {
    color: var(--text);
    background: rgba(0, 0, 0, 0.02);
}

.category-tab.active {
    color: var(--brand);
    border-bottom-color: var(--brand);
    background: var(--brand-light);
}

.category-tab-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

@media (max-width: 768px) {
    .category-nav {
        top: 65px;
    }
    .category-tab {
        padding: 0.875rem 1rem;
        font-size: 0.85rem;
    }
}

/* 公告页面内容容器 - 限制最大宽度提升阅读体验 */
.announcement-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 2rem;
}

@media (max-width: 768px) {
    .announcement-container {
        padding: 0 1.25rem;
    }
}

/* Info Cards - 新设计 */
.info-section {
    margin-bottom: 5rem;
    scroll-margin-top: 140px;
}

/* 公告列表区域的滚动边距 */
#announcements.info-section {
    scroll-margin-top: 160px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

@media (max-width: 968px) {
    .info-grid {
        grid-template-columns: 1fr;
    }
}

.info-card {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    border: 1px solid var(--border);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--card-color, var(--brand));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.06);
    border-color: transparent;
}

.info-card:hover::before {
    opacity: 1;
}

.info-card.green {
    --card-color: #22C55E;
}

.info-card.blue {
    --card-color: #2563EB;
}

.info-card.orange {
    --card-color: #F59E0B;
}

.info-card-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-light);
    border-radius: 12px;
    color: var(--brand);
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    transition: all 0.3s ease;
}

.info-card:hover .info-card-icon {
    transform: scale(1.1);
    background: var(--card-color, var(--brand));
    color: white;
}

.info-card.green .info-card-icon {
    background: rgba(34, 197, 94, 0.08);
    color: #22C55E;
}

.info-card.orange .info-card-icon {
    background: rgba(245, 158, 11, 0.08);
    color: #F59E0B;
}

.info-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.info-card-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Security Card - 醒目警告风格 */
.security-card {
    background: linear-gradient(135deg, #FFFBEB 0%, #FEF3C7 100%);
    border-radius: 20px;
    padding: 2rem;
    border: 2px solid #F59E0B;
    position: relative;
    overflow: hidden;
    box-shadow:
        0 0 0 4px rgba(245, 158, 11, 0.1),
        0 20px 40px rgba(245, 158, 11, 0.15);
}

.security-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #EF4444, #F59E0B, #EF4444);
}

/* 警示条纹背景 */
.security-card::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 120px;
    height: 120px;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(245, 158, 11, 0.05) 10px,
        rgba(245, 158, 11, 0.05) 20px
    );
    pointer-events: none;
}

.security-header {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.security-icon {
    width: 52px;
    height: 52px;
    background: linear-gradient(135deg, #F59E0B, #EF4444);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
    box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3);
    animation: security-pulse 2s ease-in-out infinite;
}

@keyframes security-pulse {
    0%, 100% { transform: scale(1); box-shadow: 0 8px 20px rgba(245, 158, 11, 0.3); }
    50% { transform: scale(1.05); box-shadow: 0 12px 28px rgba(245, 158, 11, 0.4); }
}



.security-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #92400E;
}

.security-desc {
    font-size: 0.9rem;
    color: #A16207;
    line-height: 1.7;
}

.security-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    position: relative;
    z-index: 1;
}

@media (max-width: 768px) {
    .security-grid {
        grid-template-columns: 1fr;
    }
}

.security-item {
    background: white;
    border-radius: 14px;
    padding: 1.25rem;
    border: 2px solid rgba(245, 158, 11, 0.3);
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.08);
    transition: all 0.3s ease;
}

.security-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245, 158, 11, 0.15);
    border-color: rgba(245, 158, 11, 0.5);
}

.security-item-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.875rem;
}

.security-item-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
}

.security-item.danger .security-item-icon {
    background: linear-gradient(135deg, #FEE2E2, #FECACA);
    color: #DC2626;
}

.security-item.safe .security-item-icon {
    background: linear-gradient(135deg, #D1FAE5, #A7F3D0);
    color: #16A34A;
}

.security-item-title {
    font-size: 0.9rem;
    font-weight: 700;
}

.security-item.danger .security-item-title {
    color: #DC2626;
}

.security-item.safe .security-item-title {
    color: #16A34A;
}

.security-list {
    list-style: none;
    font-size: 0.85rem;
    color: #78716C;
}

.security-list li {
    padding: 0.4rem 0;
    padding-left: 1.25rem;
    position: relative;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.06);
}

.security-list li:last-child {
    border-bottom: none;
}

.security-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    border-radius: 50%;
}

.security-item.danger .security-list li::before {
    background: #FCA5A5;
}

.security-item.safe .security-list li::before {
    background: #86EFAC;
}

/* Timeline - 优化时间线布局，时间移至卡片左侧外部 */
.timeline {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-left: -86px; /* 负边距使卡片与安全提醒卡片对齐 */
}

.timeline-row {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.timeline-date-col {
    flex-shrink: 0;
    width: 70px;
    text-align: right;
    padding-top: 1.25rem;
}

.timeline-month {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.timeline-day {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
}

.timeline-year {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

.timeline-item {
    flex: 1;
    position: relative;
    background: white;
    border-radius: 16px;
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--border);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
    transition: all 0.3s ease;
}

.timeline-item:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: rgba(37, 99, 235, 0.15);
}

/* 左侧彩色条 */
.timeline-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--item-color, var(--brand));
    border-radius: 16px 0 0 16px;
}

.timeline-item.green { --item-color: #22C55E; }
.timeline-item.purple { --item-color: #A855F7; }
.timeline-item.blue { --item-color: #2563EB; }
.timeline-item.orange { --item-color: #F59E0B; }

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
    gap: 0.5rem;
    padding-left: 0.5rem;
}

.timeline-title-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
}

.timeline-meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.timeline-body {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.8;
    padding-left: 0.5rem;
}

/* 移动端时间线适配 */
@media (max-width: 768px) {
    .timeline {
        margin-left: 0; /* 移动端恢复正常边距 */
    }

    .timeline-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .timeline-date-col {
        width: 100%;
        text-align: left;
        display: flex;
        align-items: center;
        gap: 0.5rem;
        padding-top: 0;
        padding-left: 0.5rem;
    }

    .timeline-month {
        margin-bottom: 0;
    }

    .timeline-day {
        font-size: 1rem;
    }

    .timeline-year {
        margin-top: 0;
        margin-left: auto;
    }
}

/* Tag */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.tag.green {
    background: rgba(34, 197, 94, 0.1);
    color: #16A34A;
}

.tag.blue {
    background: var(--brand-light);
    color: var(--brand);
}

.tag.purple {
    background: rgba(168, 85, 247, 0.1);
    color: #9333EA;
}

.tag.orange {
    background: rgba(245, 158, 11, 0.1);
    color: #D97706;
}

/* Update Details */
.update-details {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}

.update-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .update-grid {
        grid-template-columns: 1fr;
    }
}

.update-item {
    background: var(--bg-subtle);
    border-radius: 12px;
    padding: 1.25rem;
    border: 1px solid var(--border);
}

.update-item-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
}

.update-item-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    background: var(--brand-light);
    color: var(--brand);
}

.update-item-title {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
}

.update-item-subtitle {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.update-list {
    list-style: none;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.update-list li {
    padding: 0.25rem 0;
    padding-left: 0.75rem;
    position: relative;
}

.update-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 4px;
    height: 4px;
    background: var(--text-light);
    border-radius: 50%;
}

/* Footer */
footer {
    background: var(--bg-subtle);
    padding: 3rem 0;
    border-top: 1px solid var(--border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-logo img {
    height: 22px;
    width: auto;
    opacity: 0.4;
    transition: opacity 0.3s ease;
}

.footer-logo:hover img {
    opacity: 0.8;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--text);
}

@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

/* ============================================
   公告列表组件样式
   ============================================ */

/* 公告列表容器 */
.announcement-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* 单个公告项 */
.announcement-item {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    border: 1px solid var(--border);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.announcement-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--brand);
    transition: width 0.3s ease;
}

.announcement-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    border-color: transparent;
}

.announcement-item:hover::before {
    width: 6px;
}

/* 公告分类样式 */
.announcement-item.notice::before {
    background: #22C55E;
}

.announcement-item.alert::before {
    background: #F59E0B;
}

/* 公告项头部 */
.announcement-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.announcement-item-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 分类标签 */
.announcement-item-category {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.875rem;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.announcement-item-category.notice {
    background: rgba(34, 197, 94, 0.1);
    color: #16A34A;
}

.announcement-item-category.alert {
    background: rgba(245, 158, 11, 0.1);
    color: #D97706;
}

.announcement-item-category:hover {
    transform: scale(1.05);
}

/* 日期信息 */
.announcement-item-date {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.announcement-item-date i {
    font-size: 0.75rem;
}

/* 置顶标签 */
.announcement-item-priority {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    background: linear-gradient(135deg, #FEF3C7, #FDE68A);
    color: #92400E;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    animation: priority-pulse 2s ease-in-out infinite;
}

@keyframes priority-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(245, 158, 11, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(245, 158, 11, 0); }
}

.announcement-item-priority i {
    font-size: 0.7rem;
}

/* 公告内容区 */
.announcement-item-content {
    margin-bottom: 1rem;
}

.announcement-item-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem;
    line-height: 1.5;
    transition: color 0.3s ease;
}

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

.announcement-item-summary {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* 公告项底部 */
.announcement-item-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.875rem;
    border-top: 1px solid var(--border);
}

.announcement-item-views {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
}

.announcement-item-views i {
    font-size: 0.75rem;
}

/* ============================================
   加载状态样式
   ============================================ */

.announcement-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    gap: 1.25rem;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--brand);
    font-size: 2rem;
    animation: loading-rotate 1s linear infinite;
}

@keyframes loading-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ============================================
   错误状态样式
   ============================================ */

.announcement-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    gap: 1rem;
    text-align: center;
}

.error-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(239, 68, 68, 0.1);
    border-radius: 50%;
    color: #EF4444;
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.error-text {
    font-size: 1rem;
    color: var(--text);
    font-weight: 600;
    margin: 0;
}

.error-retry-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--brand);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 0.5rem;
}

.error-retry-btn:hover {
    background: #1d4ed8;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.error-retry-btn:active {
    transform: translateY(0);
}

/* ============================================
   空状态样式
   ============================================ */

.announcement-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
}

.empty-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-subtle);
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 2.5rem;
    margin-bottom: 1.25rem;
}

.empty-text {
    font-size: 1.1rem;
    color: var(--text);
    font-weight: 600;
    margin: 0 0 0.5rem 0;
}

.empty-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

/* ============================================
   加载更多按钮样式
   ============================================ */

.announcement-load-more {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.load-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.875rem 2rem;
    background: white;
    color: var(--brand);
    border: 2px solid var(--brand);
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.load-more-btn:hover {
    background: var(--brand);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.3);
}

.load-more-btn:active {
    transform: translateY(0);
}

.load-more-btn i {
    transition: transform 0.3s ease;
}

.load-more-btn:hover i {
    transform: rotate(90deg);
}

/* ============================================
   响应式设计 - 移动端适配
   ============================================ */

@media (max-width: 768px) {
    .announcement-item {
        padding: 1.25rem;
    }
    
    .announcement-item-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }
    
    .announcement-item-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.625rem;
    }
    
    .announcement-item-title {
        font-size: 1rem;
    }
    
    .announcement-item-summary {
        font-size: 0.85rem;
    }
    
    .announcement-item-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .announcement-loading,
    .announcement-error,
    .announcement-empty {
        padding: 3rem 1.5rem;
    }
    
    .loading-spinner {
        width: 40px;
        height: 40px;
        font-size: 1.75rem;
    }
    
    .error-icon {
        width: 56px;
        height: 56px;
        font-size: 1.75rem;
    }
    
    .empty-icon {
        width: 72px;
        height: 72px;
        font-size: 2.25rem;
    }
    
    .load-more-btn {
        width: 100%;
        justify-content: center;
        padding: 0.875rem 1.5rem;
    }
}

@media (max-width: 480px) {
    .announcement-item {
        padding: 1rem;
        border-radius: 12px;
    }
    
    .announcement-item-category,
    .announcement-item-date {
        font-size: 0.75rem;
        padding: 0.3125rem 0.75rem;
    }
    
    .announcement-item-title {
        font-size: 0.95rem;
    }
    
    .announcement-item-summary {
        font-size: 0.8rem;
    }
    
    .announcement-item-views {
        font-size: 0.75rem;
    }
}