/* ==================== 基础样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #c41230;
    --primary-dark: #a00f28;
    --secondary: #ff6b6b;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --dark: #333;
    --gray: #666;
    --light-gray: #999;
    --border: #e0e0e0;
    --bg: #f5f5f5;
    --white: #fff;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--dark);
    background: var(--bg);
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ==================== 头部导航 ==================== */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    align-items: center;
    height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    color: var(--primary);
    margin-right: 40px;
}

.logo i {
    margin-right: 8px;
    font-size: 24px;
}

.main-nav {
    display: flex;
    flex: 1;
}

.main-nav a {
    padding: 0 20px;
    height: 60px;
    line-height: 60px;
    color: var(--gray);
    font-size: 15px;
    transition: all 0.3s;
    border-bottom: 2px solid transparent;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-box {
    display: flex;
    align-items: center;
    background: var(--bg);
    border-radius: 20px;
    padding: 5px 15px;
    width: 220px;
}

.search-box input {
    border: none;
    background: transparent;
    outline: none;
    flex: 1;
    font-size: 13px;
}

.search-box button {
    border: none;
    background: transparent;
    color: var(--gray);
    cursor: pointer;
}

.btn-login {
    padding: 8px 20px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

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

/* ==================== 页面切换 ==================== */
.page {
    display: none;
    min-height: calc(100vh - 60px - 200px);
}

.page.active {
    display: block;
}

/* ==================== 首页 - 市场概览 ==================== */
.market-overview {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: 40px 0;
    color: var(--white);
}

.market-overview h2 {
    margin-bottom: 20px;
    font-size: 20px;
}

.index-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.index-card {
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    transition: transform 0.3s;
}

.index-card:hover {
    transform: translateY(-5px);
}

.index-card .index-name {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 8px;
}

.index-card .index-value {
    font-size: 28px;
    font-weight: bold;
    margin-bottom: 5px;
}

.index-card .index-change {
    font-size: 14px;
}

.index-card.up .index-change {
    color: #ff6b6b;
}

.index-card.down .index-change {
    color: #4caf50;
}

/* ==================== 首页 - 热门基金 ==================== */
.hot-funds {
    padding: 40px 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.section-header h2 {
    font-size: 20px;
}

.more {
    color: var(--gray);
    font-size: 13px;
}

.more:hover {
    color: var(--primary);
}

.fund-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    background: var(--white);
    padding: 10px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.tab-btn {
    padding: 8px 20px;
    border: none;
    background: transparent;
    cursor: pointer;
    border-radius: 5px;
    font-size: 14px;
    color: var(--gray);
    transition: all 0.3s;
}

.tab-btn:hover {
    background: var(--bg);
}

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

/* ==================== 表格样式 ==================== */
.fund-table-wrapper {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.fund-table th,
.fund-table td {
    padding: 15px 12px;
    text-align: left;
}

.fund-table th {
    background: #fafafa;
    font-weight: 600;
    color: var(--gray);
    font-size: 13px;
}

.fund-table tbody tr {
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
}

.fund-table tbody tr:hover {
    background: #fafafa;
}

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

.fund-table .fund-name {
    color: var(--primary);
    font-weight: 500;
}

.fund-table .fund-name:hover {
    text-decoration: underline;
}

.fund-table .return {
    font-weight: 500;
}

.fund-table .return.up {
    color: var(--danger);
}

.fund-table .return.down {
    color: var(--success);
}

.fund-table .btn-favor {
    padding: 5px 12px;
    border: 1px solid var(--primary);
    background: transparent;
    color: var(--primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: all 0.3s;
}

.fund-table .btn-favor:hover,
.fund-table .btn-favor.active {
    background: var(--primary);
    color: var(--white);
}

.fund-table .rank {
    font-weight: bold;
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.fund-table .rank.top3 {
    background: var(--primary);
    color: var(--white);
}

.fund-table th.sortable {
    cursor: pointer;
}

.fund-table th.sortable:hover {
    color: var(--primary);
}

.fund-table th.sortable.active {
    color: var(--primary);
}

/* ==================== 首页 - 特色服务 ==================== */
.services {
    padding: 40px 0 60px;
}

.services h2 {
    text-align: center;
    margin-bottom: 40px;
    font-size: 24px;
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.service-card {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.service-card i {
    font-size: 40px;
    color: var(--primary);
    margin-bottom: 15px;
}

.service-card h3 {
    font-size: 16px;
    margin-bottom: 10px;
}

.service-card p {
    color: var(--gray);
    font-size: 13px;
    line-height: 1.6;
}

/* ==================== 页面头部 ==================== */
.page-header {
    padding: 30px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-header h1 {
    font-size: 24px;
}

/* ==================== 基金排行页 ==================== */
.filter-bar {
    background: var(--white);
    padding: 20px;
    border-radius: 12px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    display: flex;
    gap: 40px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-group label {
    color: var(--gray);
    font-size: 13px;
}

.filter-group select {
    padding: 8px 15px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 13px;
    outline: none;
    cursor: pointer;
}

.sort-buttons {
    display: flex;
    gap: 5px;
}

.sort-btn {
    padding: 6px 15px;
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s;
}

.sort-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

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

/* ==================== 自选基金页 ==================== */
.btn-clear {
    padding: 8px 15px;
    background: transparent;
    border: 1px solid var(--danger);
    color: var(--danger);
    border-radius: 5px;
    cursor: pointer;
    font-size: 13px;
    transition: all 0.3s;
}

.btn-clear:hover {
    background: var(--danger);
    color: var(--white);
}

.favor-empty {
    text-align: center;
    padding: 80px 20px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.favor-empty i {
    font-size: 60px;
    color: var(--light-gray);
    margin-bottom: 20px;
}

.favor-empty p {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 10px;
}

.favor-empty span {
    color: var(--light-gray);
    font-size: 13px;
}

/* ==================== 基金比较页 ==================== */
.compare-selector {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.compare-inputs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.compare-input label {
    display: block;
    margin-bottom: 8px;
    color: var(--gray);
    font-size: 13px;
}

.compare-input select {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 14px;
    outline: none;
}

.btn-compare {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.3s;
}

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

.compare-result {
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    overflow: hidden;
}

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

.compare-table th,
.compare-table td {
    padding: 15px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.compare-table th {
    background: #fafafa;
    font-weight: 600;
}

.compare-table td:first-child {
    background: #fafafa;
    font-weight: 500;
    color: var(--gray);
}

.compare-table .best {
    color: var(--danger);
    font-weight: bold;
}

/* ==================== 收益计算器页 ==================== */
.calc-wrapper {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 30px;
}

.calc-inputs {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    height: fit-content;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--gray);
    font-size: 13px;
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border);
    border-radius: 5px;
    font-size: 14px;
    outline: none;
}

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

.btn-calc {
    width: 100%;
    padding: 12px;
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.3s;
}

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

.calc-result {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
}

.result-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.result-card {
    background: linear-gradient(135deg, #fafafa 0%, #f0f0f0 100%);
    padding: 25px;
    border-radius: 10px;
    text-align: center;
}

.result-label {
    color: var(--gray);
    font-size: 13px;
    margin-bottom: 10px;
}

.result-value {
    font-size: 24px;
    font-weight: bold;
}

.result-value.highlight {
    color: var(--primary);
}

.result-chart {
    height: 300px;
}

/* ==================== 底部 ==================== */
.footer {
    background: #2c3e50;
    color: #bdc3c7;
    padding: 40px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    color: var(--white);
    margin-bottom: 15px;
    font-size: 15px;
}

.footer-section p {
    font-size: 13px;
    line-height: 1.8;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    font-size: 12px;
}

/* ==================== Toast提示 ==================== */
.toast {
    position: fixed;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(0,0,0,0.8);
    color: var(--white);
    padding: 12px 30px;
    border-radius: 25px;
    font-size: 14px;
    opacity: 0;
    transition: all 0.3s;
    z-index: 9999;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .index-cards {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .service-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .calc-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 20px;
    }
    
    .logo {
        margin-right: auto;
    }
    
    .main-nav {
        order: 3;
        width: 100%;
        justify-content: center;
        margin-top: 10px;
    }
    
    .main-nav a {
        padding: 0 15px;
        height: 40px;
        line-height: 40px;
        font-size: 14px;
    }
    
    .search-box {
        width: 160px;
    }
    
    .index-cards {
        grid-template-columns: 1fr;
    }
    
    .service-grid {
        grid-template-columns: 1fr;
    }
    
    .fund-table {
        font-size: 12px;
    }
    
    .fund-table th,
    .fund-table td {
        padding: 10px 8px;
    }
    
    .compare-inputs {
        grid-template-columns: 1fr;
    }
    
    .result-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .filter-bar {
        flex-direction: column;
        gap: 15px;
    }
    
    .sort-buttons {
        flex-wrap: wrap;
    }
}

/* ==================== 动画效果 ==================== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page.active {
    animation: fadeIn 0.3s ease;
}