/* ========================================
   Apple风格 - 全局变量
   ======================================== */

:root {
    /* Apple风格配色 - 灰色系统 */
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-bg-tertiary: #fafafa;
    
    /* 文字颜色 */
    --color-text: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    
    /* Apple蓝色系统 */
    --color-blue: #0071e3;
    --color-blue-light: #2997ff;
    --color-blue-dark: #0051a2;
    
    /* 强调色 */
    --color-green: #34c759;
    --color-orange: #ff9500;
    --color-red: #ff3b30;
    
    /* 微妙渐变 */
    --gradient-subtle: linear-gradient(180deg, rgba(255,255,255,0) 0%, rgba(0,0,0,0.02) 100%);
    --gradient-card: linear-gradient(135deg, #fafafa 0%, #f5f5f7 100%);
    --gradient-blue: linear-gradient(135deg, #2997ff 0%, #0071e3 100%);
    
    /* 阴影系统 - 更柔和、更层次化 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.10);
    
    /* 圆角 - Apple风格的小圆角 */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    /* 间距系统 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;
    
    /* 字体系统 */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Noto Sans SC', 'PingFang SC', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Courier New', monospace;
    
    /* 过渡动画 */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   全局重置与基础样式
   ======================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.47059;
    letter-spacing: -0.022em;
    font-weight: 400;
}

/* ========================================
   容器系统
   ======================================== */

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

@media (min-width: 1024px) {
    .container {
        max-width: 1024px;
        padding: 0 var(--space-xl);
    }
}

@media (min-width: 1440px) {
    .container {
        max-width: 1280px;
    }
}

/* ========================================
   导航栏 - Apple风格
   ======================================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 48px;
    padding-top: 0;
    padding-bottom: 0;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.022em;
}

.brand-logo {
    height: 32px;
    width: auto;
    object-fit: contain;
}

.nav-brand i {
    font-size: 20px;
    color: var(--color-blue);
}

.nav-menu {
    display: flex;
    gap: var(--space-xl);
    align-items: center;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 400;
    letter-spacing: -0.016em;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--color-text);
}

.nav-link.active {
    color: var(--color-blue);
    font-weight: 500;
}

/* ========================================
   方案切换器
   ======================================== */

.methodology-switcher {
    position: fixed;
    top: 48px;
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    z-index: 999;
    padding: var(--space-md) 0;
}

.switcher-container {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.switcher-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.switcher-label i {
    color: var(--color-blue);
}

.switcher-tabs {
    display: flex;
    gap: var(--space-md);
    flex: 1;
}

.switcher-tab {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: white;
    border: 2px solid rgba(0, 0, 0, 0.06);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
}

.switcher-tab:hover {
    border-color: rgba(0, 113, 227, 0.3);
    box-shadow: var(--shadow-sm);
}

.switcher-tab.active {
    border-color: var(--color-blue);
    background: linear-gradient(135deg, rgba(41, 151, 255, 0.05) 0%, rgba(0, 113, 227, 0.03) 100%);
    box-shadow: 0 2px 12px rgba(0, 113, 227, 0.12);
}

.tab-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.switcher-tab.active .tab-icon {
    background: var(--gradient-blue);
    color: white;
}

.tab-content {
    flex: 1;
    text-align: left;
}

.tab-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 2px;
}

.tab-desc {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

/* ========================================
   区块系统
   ======================================== */

.section {
    padding: var(--space-3xl) 0;
}

.section-first {
    padding-top: calc(48px + 80px + var(--space-xl));
}

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

.section-title {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.005em;
    line-height: 1.125;
    color: var(--color-text);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.section-number {
    color: var(--color-text-tertiary);
    font-weight: 500;
}

/* ========================================
   数据卡片 - Apple风格
   ======================================== */

.summary-cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.summary-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
    border: 1px solid rgba(0, 0, 0, 0.04);
    position: relative;
    overflow: hidden;
}

.summary-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-blue);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.summary-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    border-color: rgba(0, 0, 0, 0.06);
}

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

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    font-size: 24px;
    color: white;
    background: var(--gradient-blue);
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.card-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    letter-spacing: -0.016em;
}

.card-value {
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.022em;
    line-height: 1.2;
}

.card-value .highlight {
    color: var(--color-blue);
}

.card-change {
    font-size: 13px;
    color: var(--color-text-tertiary);
    font-weight: 400;
}

.card-change.positive {
    color: var(--color-text-secondary);
}

.highlight-green {
    color: var(--color-green);
    font-weight: 600;
    font-size: 1.1em;
}

/* 师生比和国际化卡片特殊样式 */
.metric-compare {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.metric-row {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.metric-label {
    font-size: 12px;
    color: var(--color-text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.metric-values {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 16px;
    font-weight: 600;
}

.old-value {
    color: var(--color-text-tertiary);
    text-decoration: line-through;
    text-decoration-thickness: 1px;
}

.new-value {
    color: var(--color-blue);
}

.metric-values i {
    font-size: 12px;
    color: var(--color-text-tertiary);
}

.metric-total {
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.total-label {
    font-size: 12px;
    color: var(--color-text-tertiary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.total-value {
    font-size: 15px;
    color: var(--color-green);
    font-weight: 600;
}

.metric-impact {
    font-size: 12px;
    color: var(--color-green);
    font-weight: 500;
    padding: var(--space-xs) 0;
}

/* ========================================
   内容区块
   ======================================== */

.content-block {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.content-title {
    font-size: 21px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    letter-spacing: -0.022em;
}

.content-title i {
    color: var(--color-blue);
    font-size: 20px;
}

.text-content {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-text-secondary);
    letter-spacing: 0.01em;
}

.text-content h4,
.text-content h5 {
    line-height: 1.6;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-md);
}

.text-content p {
    line-height: 1.8;
    letter-spacing: 0.01em;
}

.methodology-section {
    margin-bottom: var(--space-lg);
}

.methodology-section h5 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
}

.methodology-section p,
.methodology-section ul {
    line-height: 1.8;
    letter-spacing: 0.01em;
}

.methodology-section ul li {
    margin-bottom: var(--space-sm);
}

.text-content p {
    margin-bottom: var(--space-md);
}

.text-content ul {
    list-style: none;
    padding: 0;
}

.text-content li {
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    position: relative;
}

.text-content li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-blue);
    font-weight: 600;
}

.text-content strong {
    color: var(--color-text);
    font-weight: 600;
}

/* ========================================
   表格 - Apple风格
   ======================================== */

.table-explanation {
    margin-bottom: var(--space-lg);
}

.explanation-box {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.explanation-box h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.explanation-box i {
    color: var(--color-blue);
}

.explanation-box ul {
    list-style: none;
    padding: 0;
    font-size: 13px;
    color: var(--color-text-secondary);
}

.explanation-box li {
    padding: var(--space-xs) 0;
    padding-left: var(--space-lg);
    position: relative;
}

.explanation-box li::before {
    content: '·';
    position: absolute;
    left: 0;
    color: var(--color-text-tertiary);
}

.highlight-note {
    color: var(--color-blue) !important;
    font-weight: 500;
}

.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-md);
    margin: var(--space-lg) 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-bg);
    font-size: 13px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.data-table thead {
    background: var(--color-bg-secondary);
}

.data-table th {
    padding: var(--space-md) var(--space-sm);
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.data-table th small {
    display: block;
    font-size: 11px;
    color: var(--color-text-tertiary);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
    margin-top: 2px;
}

.data-table td {
    padding: var(--space-md) var(--space-sm);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    color: var(--color-text-secondary);
    font-size: 13px;
}

.data-table td small {
    display: block;
    font-size: 11px;
    color: var(--color-text-tertiary);
    margin-top: 2px;
}

.data-table tbody tr {
    transition: background-color var(--transition-fast);
}

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

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

/* 高亮行 - 明显的淡黄色 */
.highlight-row {
    background: rgba(255, 235, 59, 0.15) !important;
}

.highlight-row:hover {
    background: rgba(255, 235, 59, 0.22) !important;
}

.clickable-row {
    cursor: pointer;
}

.clickable-row td {
    position: relative;
}

/* 总分行 */
.total-row {
    background: var(--color-bg-secondary);
    font-weight: 600;
}

.total-row td {
    color: var(--color-text);
    border-top: 2px solid rgba(0, 0, 0, 0.08);
}

/* 表格中的状态颜色 */
.positive {
    color: var(--color-green);
    font-weight: 500;
}

.negative {
    color: var(--color-red);
    font-weight: 500;
}

.neutral {
    color: var(--color-text-tertiary);
}

.formula-small {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--color-text-tertiary);
}

/* ========================================
   总分计算摘要 - Apple风格
   ======================================== */

.total-summary {
    margin-top: var(--space-lg);
}

.summary-box {
    background: linear-gradient(135deg, #fafafa 0%, #f5f5f7 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: var(--shadow-sm);
}

.summary-box h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    letter-spacing: -0.022em;
}

.summary-box i {
    color: var(--color-blue);
}

.summary-content {
    background: var(--color-bg);
    border-radius: var(--radius-md);
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.summary-formula,
.summary-comparison,
.summary-breakdown {
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    border-left: 3px solid;
}

.summary-formula {
    border-left-color: var(--color-text-tertiary);
    background: var(--color-bg-tertiary);
}

.summary-comparison {
    border-left-color: var(--color-green);
    background: rgba(52, 199, 89, 0.04);
}

.summary-breakdown {
    border-left-color: var(--color-orange);
    background: rgba(255, 149, 0, 0.04);
}

.formula-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.formula-text {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.formula-text strong {
    color: var(--color-blue);
    font-size: 15px;
}

.summary-comparison p,
.summary-breakdown p {
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 13px;
    color: var(--color-text-secondary);
}

.summary-comparison i {
    color: var(--color-green);
}

.summary-breakdown i {
    color: var(--color-orange);
}

.highlight-value {
    color: var(--color-blue);
    font-weight: 600;
}

/* ========================================
   图表容器
   ======================================== */

.charts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.chart-container {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all var(--transition-base);
}

.chart-container:hover {
    box-shadow: var(--shadow-md);
}

.chart-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    letter-spacing: -0.022em;
}

.chart-title i {
    color: var(--color-blue);
}

.chart-image {
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.chart-image img {
    width: 100%;
    height: auto;
    display: block;
    cursor: pointer;
    transition: transform var(--transition-base);
}

.chart-image img:hover {
    transform: scale(1.02);
}

.chart-description {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* ========================================
   页脚
   ======================================== */

.footer {
    background: var(--color-bg-secondary);
    padding: var(--space-xl) 0;
    border-top: 1px solid rgba(0, 0, 0, 0.04);
}

.footer p {
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: 13px;
    margin: 0;
}

/* ========================================
   返回顶部按钮
   ======================================== */

.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 44px;
    height: 44px;
    background: var(--color-bg);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text);
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* ========================================
   模态框
   ======================================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.modal-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    font-size: 32px;
    color: white;
    cursor: pointer;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.modal-content {
    max-width: 90%;
    max-height: 90%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   侧边详情面板 - Apple风格
   ======================================== */

.detail-panel {
    position: fixed;
    top: 0;
    right: -100%;
    width: 520px;
    height: 100vh;
    background: linear-gradient(180deg, #fafafa 0%, #ffffff 100%);
    box-shadow: -12px 0 60px rgba(0, 0, 0, 0.18), -4px 0 24px rgba(0, 0, 0, 0.08);
    z-index: 1500;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
}

.detail-panel.active {
    right: 0;
}

.detail-panel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(4px);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 1400;
}

.detail-panel.active ~ .detail-panel-overlay {
    opacity: 1;
    visibility: visible;
}

.detail-panel-content {
    padding: var(--space-xl);
}

.detail-panel-close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-bg-secondary);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.detail-panel-close:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    transform: scale(1.1);
}

.detail-panel-body {
    padding-top: var(--space-2xl);
}

.detail-change-card {
    background: linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid rgba(0, 0, 0, 0.06);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
}

.detail-change-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    padding-bottom: var(--space-lg);
    border-bottom: 2px solid rgba(0, 113, 227, 0.12);
    background: linear-gradient(135deg, rgba(41, 151, 255, 0.06) 0%, rgba(0, 113, 227, 0.04) 100%);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    margin: calc(-1 * var(--space-xl)) calc(-1 * var(--space-xl)) var(--space-xl);
    padding: var(--space-xl);
    box-shadow: 0 2px 12px rgba(0, 113, 227, 0.08);
}

.detail-change-header i {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--gradient-blue);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.detail-change-header h3 {
    font-size: 19px;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.022em;
}

.detail-change-step {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding: calc(var(--space-md) + 4px);
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid rgba(0, 0, 0, 0.06);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.detail-change-step:hover {
    border-color: rgba(0, 113, 227, 0.25);
    box-shadow: 0 4px 16px rgba(0, 113, 227, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
    transform: translateY(-1px);
}

.detail-change-step:last-child {
    margin-bottom: 0;
}

.detail-step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-blue-light) 0%, var(--color-blue) 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 15px;
    box-shadow: 0 3px 12px rgba(0, 113, 227, 0.35), 0 1px 4px rgba(0, 113, 227, 0.2);
}

.detail-step-text {
    flex: 1;
}

.detail-step-text strong {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.detail-step-text p,
.detail-step-text ul {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.detail-step-text ul {
    list-style: none;
    padding: 0;
}

.detail-step-text li {
    padding: var(--space-xs) 0;
    padding-left: var(--space-md);
    position: relative;
}

.detail-step-text li::before {
    content: '·';
    position: absolute;
    left: 0;
    color: var(--color-blue);
}

.detail-highlight-value {
    color: var(--color-blue);
    font-weight: 600;
}

.detail-result-box {
    background: rgba(52, 199, 89, 0.1);
    padding: var(--space-md);
    border-radius: var(--radius-sm);
    border-left: 3px solid var(--color-green);
    font-size: 15px;
    font-weight: 600;
    color: var(--color-green);
}

/* ========================================
   排名位置表格
   ======================================== */

.ranking-position {
    margin-top: var(--space-xl);
}

.ranking-subtitle {
    font-size: 17px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid rgba(0, 113, 227, 0.1);
}

.ranking-subtitle i {
    color: var(--color-blue);
    font-size: 16px;
}

.ranking-table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.ranking-comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-bg);
    font-size: 13px;
}

.ranking-comparison-table thead {
    background: var(--color-bg-secondary);
}

.ranking-comparison-table th {
    padding: var(--space-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-bottom: 2px solid rgba(0, 0, 0, 0.08);
}

.ranking-comparison-table td {
    padding: var(--space-md);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
    color: var(--color-text-secondary);
}

.ranking-comparison-table tbody tr {
    transition: background-color var(--transition-fast);
}

.ranking-comparison-table tbody tr:hover {
    background: var(--color-bg-tertiary);
}

.ranking-comparison-table .current-position {
    background: linear-gradient(135deg, rgba(41, 151, 255, 0.08) 0%, rgba(0, 113, 227, 0.05) 100%);
    font-weight: 600;
}

.ranking-comparison-table .current-position:hover {
    background: linear-gradient(135deg, rgba(41, 151, 255, 0.12) 0%, rgba(0, 113, 227, 0.08) 100%);
}

.ranking-comparison-table .current-position td {
    color: var(--color-text);
    border-bottom: 1px solid rgba(0, 113, 227, 0.2);
}

.highlight-cell {
    color: var(--color-blue) !important;
    font-weight: 600;
}

.ranking-note {
    background: var(--color-bg-tertiary);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-blue);
}

.ranking-note p {
    margin-bottom: var(--space-sm);
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    display: flex;
    align-items: flex-start;
    gap: var(--space-sm);
}

.ranking-note p:last-child {
    margin-bottom: 0;
}

.ranking-note i {
    color: var(--color-blue);
    margin-top: 2px;
    flex-shrink: 0;
}

.ranking-note strong {
    color: var(--color-blue);
    font-weight: 600;
}

/* ========================================
   响应式设计
   ======================================== */

@media (max-width: 768px) {
    :root {
        --space-xl: 24px;
        --space-2xl: 32px;
        --space-3xl: 48px;
    }
    
    .navbar .container {
        padding: 0 var(--space-md);
    }
    
    .nav-menu {
        gap: var(--space-md);
    }
    
    .nav-link {
        font-size: 13px;
    }
    
    .section {
        padding: var(--space-2xl) 0;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .summary-cards-row {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .card-value {
        font-size: 24px;
    }
    
    .content-block {
        padding: var(--space-lg);
    }
    
    .charts-grid {
        grid-template-columns: 1fr;
    }
    
    .detail-panel {
        width: 100%;
        right: -100%;
    }
    
    .back-to-top {
        bottom: var(--space-lg);
        right: var(--space-lg);
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .table-responsive {
        font-size: 12px;
    }
    
    .data-table th,
    .data-table td {
        padding: var(--space-sm) var(--space-xs);
    }
}

/* ========================================
   打印样式
   ======================================== */

@media print {
    .navbar,
    .back-to-top,
    .detail-panel,
    .modal {
        display: none !important;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    .summary-card,
    .content-block,
    .chart-container {
        box-shadow: none;
        border: 1px solid #ddd;
    }
}