/* ========== Homepage Styles ========== */

/* CSS Variables - ScholarClaw Brand Colors */
:root {
    /* 主色调 - 来自 logo */
    --primary-color: #1E3A5F;         /* 深蓝色 */
    --primary-hover: #2A4A73;
    --primary-light: #3D5A80;
    --accent-color: #E53935;          /* 红色 */
    --accent-hover: #EF5350;
    --accent-light: #FFCDD2;

    /* 背景和表面 */
    --bg-color: #F8FAFC;
    --surface-color: #ffffff;

    /* 文字颜色 */
    --text-primary: #1E3A5F;
    --text-secondary: #5A6A7A;
    --text-tertiary: #8A9AAA;

    /* 边框 */
    --border-color: #E8EEF4;
    --border-hover: #C8D4E0;

    /* 圆角 */
    --radius-md: 8px;
    --radius-lg: 12px;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #1E3A5F 0%, #3D5A80 100%);
    --gradient-accent: linear-gradient(135deg, #E53935 0%, #FF5252 100%);
    --gradient-mixed: linear-gradient(135deg, #1E3A5F 0%, #E53935 100%);
}

/* Reset */
* { box-sizing: border-box; }

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========== Header ========== */
.home-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
    z-index: 100;
}

.home-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.home-logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    overflow: hidden;
}

.home-logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.home-logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: var(--gradient-mixed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.home-nav {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 24px;
}

.home-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
    white-space: nowrap;
}

.home-nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s;
}

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

.home-nav-link.active {
    color: var(--primary-color);
    font-weight: 600;
}

/* Header User Area */
.header-user-area {
    display: flex;
    align-items: center;
    gap: 16px;
}

.header-login-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--gradient-accent);
    color: white;
    text-decoration: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
}

.header-login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(229, 57, 53, 0.4);
}

.header-github-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.2s;
}

.header-github-btn:hover {
    color: var(--text-primary);
    background: var(--bg-color);
}

.header-user-info {
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.header-user-info:hover {
    background: var(--bg-color);
}

.header-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 14px;
}

.header-user-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.header-user-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    min-width: 180px;
    overflow: hidden;
    display: none;
    z-index: 200;
}

.header-user-menu.show {
    display: block;
}

.header-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    color: var(--text-primary);
    text-decoration: none;
    transition: background 0.2s;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    font-size: 14px;
}

.header-menu-item:hover {
    background: var(--bg-color);
}

.header-menu-item.logout {
    color: #dc3545;
}

.header-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

/* ========== Hero Section ========== */
.hero-section {
    padding: 140px 32px 80px;
    text-align: center;
    background: linear-gradient(180deg, #ffffff 0%, var(--bg-color) 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(30, 58, 95, 0.08);
    border-radius: 20px;
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 24px;
    border: 1px solid rgba(30, 58, 95, 0.15);
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    margin: 0 0 16px;
    background: var(--gradient-mixed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin: 0 0 32px;
    line-height: 1.6;
}

/* Hero compact mode for app view */
.hero-section.hero-compact {
    padding: 100px 32px 40px;
}

.hero-section.hero-compact .hero-title {
    font-size: 36px;
}

.hero-section.hero-compact .hero-subtitle {
    margin-bottom: 0;
}

.hero-section.hero-compact .hero-actions {
    display: none;
}

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

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

.hero-btn-primary {
    background: var(--gradient-accent);
    color: white;
}

.hero-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(229, 57, 53, 0.4);
}

.hero-btn-secondary {
    background: white;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

/* ========== View Transitions ========== */
.view-hidden {
    display: none !important;
}

.view-fade-in {
    animation: viewFadeIn 0.3s ease;
}

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

/* ========== Features Section ========== */
.features-section {
    padding: 60px 32px;
    background: var(--surface-color);
}

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

.section-title {
    text-align: center;
    font-size: 32px;
    font-weight: 700;
    margin: 0 0 12px;
    color: var(--text-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0 0 48px;
}

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

.feature-card {
    background: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: 28px;
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid transparent;
    text-decoration: none;
    color: inherit;
    display: block;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
    border-color: rgba(30, 58, 95, 0.3);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: white;
}

.feature-icon.search { background: var(--gradient-primary); }
.feature-icon.sota { background: linear-gradient(135deg, #E53935 0%, #FF5252 100%); }
.feature-icon.blog { background: linear-gradient(135deg, #1E3A5F 0%, #3D5A80 100%); }
.feature-icon.reputation { background: linear-gradient(135deg, #E53935 0%, #C62828 100%); }
.feature-icon.recommend { background: linear-gradient(135deg, #2A4A73 0%, #1E3A5F 100%); }
.feature-icon.skill { background: var(--gradient-mixed); }

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* ========== Data Sources Section ========== */
.datasources-section {
    padding: 48px 32px;
    background: var(--bg-color);
    border-top: 1px solid var(--border-color);
}

.datasources-container {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.datasources-title {
    font-size: 14px;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0 0 20px;
}

.datasources-list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
}

.datasource-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ========== Footer ========== */
.home-footer {
    padding: 32px;
    background: var(--primary-color);
    color: #e2e8f0;
    text-align: center;
    margin-top: auto;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 16px;
}

.footer-link {
    color: #94a3b8;
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

.footer-link:hover {
    color: white;
}

.footer-copyright {
    font-size: 13px;
    color: #64748b;
}

/* ========== Responsive ========== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ========== Language Switch ========== */
.lang-switch {
    display: flex;
    align-items: center;
    margin-right: 8px;
}

.lang-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    padding: 4px 8px;
    transition: color 0.2s;
    font-weight: 500;
}

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

.lang-btn.active {
    color: var(--primary-color);
    font-weight: 600;
}

.lang-divider {
    color: var(--border-color);
    margin: 0 2px;
    font-size: 12px;
}

@media (max-width: 768px) {
    .home-header {
        padding: 0 16px;
    }

    .lang-switch {
        display: none;
    }

    .hero-section {
        padding: 120px 16px 60px;
    }

    .hero-section.hero-compact {
        padding: 80px 16px 24px;
    }

    .hero-section.hero-compact .hero-title {
        font-size: 24px;
    }

    .hero-section.hero-compact .hero-actions {
        display: none;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }

    .hero-btn {
        width: 100%;
        justify-content: center;
    }

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

    .features-section {
        padding: 48px 16px;
    }

    .datasources-section {
        padding: 32px 16px;
    }

    .footer-links {
        flex-direction: column;
        gap: 16px;
    }

    .home-nav {
        display: none;
    }

    /* 体验模式下移动端显示导航栏 Tab */
    body.experience-mode .home-nav.home-nav-tabs {
        display: flex;
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        gap: 2px;
        overflow-x: auto;
        max-width: calc(100% - 120px);
    }

    body.experience-mode .home-nav.home-nav-tabs .func-tab {
        padding: 6px 10px;
        font-size: 12px;
        white-space: nowrap;
    }

    /* 体验模式下移动端内容区域 */
    body.experience-mode .func-content {
        padding-top: 72px;
        padding-left: 16px;
        padding-right: 16px;
    }

    /* Tab 栏移动端 */
    .func-tabs-wrapper {
        padding: 0 8px;
    }

    .func-tabs {
        gap: 4px;
        overflow-x: auto;
        justify-content: flex-start;
        padding: 0 8px;
    }

    .func-tab {
        padding: 8px 12px;
        font-size: 12px;
        white-space: nowrap;
    }

    .func-content {
        padding: 16px;
    }

    .search-container {
        padding: 0;
    }

    .search-box {
        padding: 12px 16px;
    }

    .search-toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .toolbar-section {
        width: 100%;
    }

    .database-pills {
        flex-wrap: nowrap;
        overflow-x: auto;
        padding-bottom: 4px;
    }

    .divider-vertical {
        display: none;
    }
}

/* ========== 功能 Tab 切换栏 ========== */
.func-tabs-wrapper {
    position: sticky;
    top: 64px;
    z-index: 90;
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
}

.func-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 12px 0;
    width: 1600px;
    max-width: 100%;
    margin: 0 auto;
}

.func-tab {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    position: relative;
}

.func-tab:hover {
    background: rgba(30, 58, 95, 0.06);
    color: var(--text-primary);
}

.func-tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 8px rgba(30, 58, 95, 0.25);
}

.func-tab svg {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
    opacity: 0.8;
}

.func-tab.active svg {
    opacity: 1;
}

/* ========== 体验模式下导航栏 Tab 样式 ========== */
.home-nav-tabs {
    gap: 4px;
}

.home-nav-tabs .func-tab {
    padding: 8px 14px;
    font-size: 13px;
    border-radius: 20px;
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid transparent;
}

.home-nav-tabs .func-tab:hover {
    background: rgba(30, 58, 95, 0.08);
    color: var(--text-primary);
}

.home-nav-tabs .func-tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 2px 6px rgba(30, 58, 95, 0.2);
}

/* 釒首页按钮特殊样式 */
.home-nav-tabs .func-tab.func-tab-home {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.home-nav-tabs .func-tab.func-tab-home:hover {
    background: rgba(30, 58, 95, 0.08);
    color: var(--primary-color);
    border-color: var(--border-hover);
}

.home-nav-tabs .func-tab svg {
    width: 14px;
    height: 14px;
}

/* 騡式切换时的首页按钮样式 */
.home-nav-tabs .func-tab-home {
    color: var(--text-secondary);
}

.home-nav-tabs .func-tab-home:hover {
    background: rgba(30, 58, 95, 0.08);
    color: var(--text-primary);
}

.home-nav-tabs .func-tab-home svg {
    opacity: 0.7;
}

/* 体验模式下隐藏原 Tab 栏 */
body.experience-mode .func-tabs-wrapper {
    display: none;
}

/* 体验模式下调整内容区域 */
body.experience-mode .func-content {
    padding-top: 80px;
    min-height: calc(100vh - 80px);
}

.home-nav-tabs .func-tab svg {
    width: 14px;
    height: 14px;
}

/* ========== 功能内容区域 ========== */
.func-content {
    min-height: calc(100vh - 200px);
    padding: 48px 48px 32px 48px;
    width: 1600px;
    max-width: 100%;
    margin: 0 auto;
}

.func-panel {
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 隐藏元素 */
.hidden {
    display: none !important;
}

/* Skill 面板深色背景 */
.func-panel.func-panel-skill {
    background: linear-gradient(180deg, #0f0f1a 0%, #1a1a2e 50%, #16213e 100%);
    margin: -24px -32px;
    padding: 0;
    min-height: calc(100vh - 300px);
}

/* ========== 搜索组件样式 ========== */
.search-container {
    max-width: 1100px;
    margin: 0 auto 32px;
}

.search-box {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 28px;
    padding: 14px 18px 14px 20px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08), 0 1px 3px rgba(0,0,0,0.05);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-box:focus-within {
    border-color: var(--primary-color);
    box-shadow: 0 4px 24px rgba(30, 58, 95, 0.12), 0 2px 8px rgba(0,0,0,0.06);
    transform: translateY(-2px);
}

.search-box .search-icon-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: var(--text-secondary);
    flex-shrink: 0;
    margin-bottom: 2px;
}

.search-textarea {
    flex: 1;
    border: none;
    outline: none;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-primary);
    background: transparent;
    resize: none;
    min-height: 28px;
    max-height: 150px;
    overflow-y: auto;
    font-family: inherit;
    padding: 0;
}

.search-textarea::placeholder {
    color: var(--text-tertiary);
}

.search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--primary-color);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    color: white;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.search-btn:hover {
    background: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.3);
}

.search-btn:active {
    transform: scale(0.95);
}

.search-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 14px;
    flex-wrap: wrap;
    gap: 12px;
}

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

.search-mode-group {
    display: flex;
    background: #f1f5f9;
    padding: 2px;
    border-radius: 6px;
}

.tool-btn {
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 500;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
}

.tool-btn.active {
    background: white;
    color: var(--text-primary);
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.sort-select-minimal {
    border: none;
    background: transparent;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    padding-right: 12px;
}

/* Date range picker styles */
.date-range-picker {
    display: flex;
    align-items: center;
    gap: 8px;
}

.date-input {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 6px 10px;
    font-size: 13px;
    color: var(--text-primary);
    background: white;
    cursor: pointer;
    transition: all 0.2s ease;
}

.date-input:hover {
    border-color: var(--border-hover);
}

.date-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(30, 58, 95, 0.1);
}

.date-separator {
    color: var(--text-tertiary);
    font-size: 13px;
}

.divider-vertical {
    width: 1px;
    height: 20px;
    background: var(--border-color);
}

.database-pills {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

.db-pill span {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.15s;
    user-select: none;
}

.db-pill input { display: none; }
.db-pill input:checked + span {
    background: #eff6ff;
    color: var(--primary-color);
    border-color: #bfdbfe;
}

.db-action-btn {
    font-size: 12px;
    color: var(--text-tertiary);
    background: none;
    border: none;
    cursor: pointer;
}
.db-action-btn:hover { color: var(--text-primary); }

/* ========== 加载状态 ========== */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 14px;
    display: none;
}

.loading::after {
    content: '';
    display: block;
    width: 24px;
    height: 24px;
    margin: 16px auto;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ========== 搜索结果区域 ========== */
.results-area {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.result-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 20px;
    transition: all 0.2s;
}

.result-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transform: translateY(-1px);
}

/* ========== 分页 ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    padding: 32px 0;
}

.pagination-btn, .pagination-page {
    min-width: 32px;
    height: 32px;
    padding: 0 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
}

.pagination-page:hover, .pagination-btn:hover:not(:disabled) {
    background: #f1f5f9;
    color: var(--text-primary);
}

.pagination-page.active {
    background: var(--text-primary);
    color: white;
}

.pagination-btn:disabled {
    color: var(--text-tertiary);
    cursor: not-allowed;
}

/* ========== 今日论文网格 ========== */
.recommend-papers {
    max-width: 1400px;
    margin: 0 auto;
}

.recommend-header {
    text-align: center;
    margin-bottom: 32px;
}

.recommend-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.recommend-header p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.paper-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: all 0.2s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 200px;
}

.paper-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.15);
    transform: translateY(-2px);
}

/* ========== AI 报告样式 ========== */
.report-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto 24px;
}

/* ========== SOTA 和 Blog 内容区域 ========== */
.sota-content, .blog-content {
    width: 100%;
    min-height: 400px;
}

/* ========== 推荐页面样式 ========== */
.recommend-container {
    width: 100%;
    margin: 0 auto;
}

.recommend-search-box {
    margin-bottom: 32px;
}

.recommend-search-input-wrapper {
    display: flex;
    align-items: center;
    gap: 12px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 16px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.recommend-search-input-wrapper svg {
    color: var(--text-secondary);
    flex-shrink: 0;
}

.recommend-search-input {
    flex: 1;
    border: none;
    outline: none;
    font-size: 15px;
    color: var(--text-primary);
    background: transparent;
}

.recommend-search-input::placeholder {
    color: var(--text-tertiary);
}

.recommend-search-btn {
    padding: 8px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

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

.recommend-search-result {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 32px;
}

.recommend-section-header {
    text-align: center;
    margin-bottom: 40px;
}

.recommend-section-header h1 {
    font-size: 28px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.recommend-section-header p {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0;
}

.recommend-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 32px;
    align-items: start;
}

.recommend-block-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 16px 0;
}

.recommend-papers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.recommend-paper-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 20px;
    transition: all 0.2s ease;
}

.recommend-paper-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.recommend-blogs-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.recommend-blog-card {
    display: block;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 16px;
    text-decoration: none;
    transition: all 0.2s;
}

.recommend-blog-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
}

.recommend-loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 14px;
}

@media (max-width: 1024px) {
    .recommend-content {
        grid-template-columns: 1fr;
    }

    .recommend-papers-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}