/* ============================================
   N区刷题题单 - 主题样式
   ============================================ */

/* ---------- CSS 变量定义 ---------- */
:root {
    /* 暖白护眼 (默认) */
    --bg-primary: #FAF8F5;
    --bg-secondary: #F0EDE8;
    --bg-card: #FFFFFF;
    --bg-navbar: #FEFDFB;
    --bg-hover: #EDE9E4;
    
    --text-primary: #212529;
    --text-secondary: #86868B;
    --text-muted: #A1A1A6;
    
    --theme-primary: #0D6EFD;
    --theme-primary-hover: #0B5ED7;
    --theme-secondary: #6C757D;
    --theme-success: #198754;
    --theme-warning: #FFC107;
    --theme-danger: #DC3545;
    
    --border-color: #DEE2E6;
    --border-light: #E9ECEF;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.15);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;

    --code-inline-bg: #E8E5E0;
}

/* 深夜黑 */
[data-theme="dark"] {
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-card: #1C1C1E;
    --bg-navbar: rgba(28, 28, 30, 0.85);
    --bg-hover: #2C2C2E;
    
    --text-primary: #E6EDF3;
    --text-secondary: #98989D;
    --text-muted: #86868B;
    
    --theme-primary: #00D4AA;
    --theme-primary-hover: #00B894;
    --theme-secondary: #8B949E;
    --theme-success: #3FB950;
    --theme-warning: #D29922;
    --theme-danger: #F85149;
    
    --border-color: #38383A;
    --border-light: #2C2C2E;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-hover: 0 12px 32px rgba(0, 0, 0, 0.5);

    --code-inline-bg: #2C2C2E;

    /* 按钮：发光玻璃拟态 */
}
[data-theme="dark"] .btn {
    transition: all 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
[data-theme="dark"] .btn:hover {
    transform: translateY(-2px);
}
[data-theme="dark"] .btn-outline {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
[data-theme="dark"] .btn-outline:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 20px rgba(0, 212, 170, 0.1);
}
[data-theme="dark"] .btn-primary {
    box-shadow: 0 0 16px rgba(0, 212, 170, 0.2);
}
[data-theme="dark"] .btn-primary:hover {
    box-shadow: 0 0 32px rgba(0, 212, 170, 0.4), 0 0 0 2px rgba(0, 212, 170, 0.3);
    transform: translateY(-2px);
}
[data-theme="dark"] .btn-secondary {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

/* 淡黄纸 */
[data-theme="sepia"] {
    --bg-primary: #FDF6E3;
    --bg-secondary: #EEE8D5;
    --bg-card: #FFF8E7;
    --bg-navbar: #FDF6E3;
    --bg-hover: #F5ECD0;
    
    --text-primary: #5C4B37;
    --text-secondary: #8B7355;
    --text-muted: #A89080;
    
    --theme-primary: #B58900;
    --theme-primary-hover: #967400;
    --theme-secondary: #8B7355;
    --theme-success: #859900;
    --theme-warning: #CB4B16;
    --theme-danger: #DC322F;
    
    --border-color: #E8D5B7;
    --border-light: #F0E0C8;
    --shadow-sm: 0 2px 4px rgba(92, 75, 55, 0.08);
    --shadow-md: 0 4px 12px rgba(92, 75, 55, 0.1);
    --shadow-lg: 0 8px 24px rgba(92, 75, 55, 0.12);
    --shadow-hover: 0 12px 32px rgba(92, 75, 55, 0.15);

    --code-inline-bg: #E8D5B7;

    /* 按钮：大圆角纸质触感 */
}
[data-theme="sepia"] .btn {
    border-radius: 10px;
    font-weight: 500;
    transition: all 0.2s ease;
}
[data-theme="sepia"] .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(92, 75, 55, 0.15);
}
[data-theme="sepia"] .btn-outline {
    border-width: 2px;
    border-style: solid;
}
[data-theme="sepia"] .btn-secondary:hover {
    border-color: var(--theme-primary);
}
[data-theme="sepia"] .btn-primary {
    box-shadow: 0 2px 10px rgba(181, 137, 0, 0.25);
}
[data-theme="sepia"] .btn-primary:hover {
    box-shadow: 0 6px 24px rgba(181, 137, 0, 0.4);
    transform: translateY(-2px);
}

/* 薄荷绿 */
[data-theme="mint"] {
    --bg-primary: #F0FDF4;
    --bg-secondary: #DCFCE7;
    --bg-card: #FFFFFF;
    --bg-navbar: #F0FDF4;
    --bg-hover: #BBF7D0;
    
    --text-primary: #14532D;
    --text-secondary: #166534;
    --text-muted: #15803D;
    
    --theme-primary: #22C55E;
    --theme-primary-hover: #16A34A;
    --theme-secondary: #166534;
    --theme-success: #22C55E;
    --theme-warning: #F59E0B;
    --theme-danger: #EF4444;
    
    --border-color: #BBF7D0;
    --border-light: #DCFCE7;
    --shadow-sm: 0 2px 4px rgba(34, 197, 94, 0.08);
    --shadow-md: 0 4px 12px rgba(34, 197, 94, 0.1);
    --shadow-lg: 0 8px 24px rgba(34, 197, 94, 0.12);
    --shadow-hover: 0 12px 32px rgba(34, 197, 94, 0.15);

    --code-inline-bg: #DCFCE7;

    /* 按钮：弹跳放大 */
}
[data-theme="mint"] .btn {
    border-radius: 10px;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
[data-theme="mint"] .btn:hover {
    transform: scale(1.06);
}
[data-theme="mint"] .btn-primary {
    box-shadow: 0 3px 16px rgba(34, 197, 94, 0.35);
}
[data-theme="mint"] .btn-primary:hover {
    box-shadow: 0 6px 28px rgba(34, 197, 94, 0.5);
    transform: scale(1.06);
}
[data-theme="mint"] .btn-outline {
    border-width: 1.5px;
}
[data-theme="mint"] .btn-outline:hover {
    border-color: var(--theme-primary);
    color: var(--theme-primary);
}

/* ---------- 全局按钮过渡 ---------- */
button, .btn, .btn-submit, .btn-guess, .btn-cancel, .btn-save, .btn-upload,
.level-btn, .sel-level-btn, .exam-type-tab, .type-tab, .page-btn,
.admin-btn, .st-btn, .action-btn-sidebar, .add-problem-btn, .problem-btn {
    transition: all 0.2s ease;
    cursor: pointer;
}

/* ====== 深夜黑：发光玻璃拟态 ====== */
[data-theme="dark"] button:hover,
[data-theme="dark"] .btn:hover,
[data-theme="dark"] .btn-submit:hover,
[data-theme="dark"] .btn-guess:hover,
[data-theme="dark"] .btn-cancel:hover,
[data-theme="dark"] .btn-save:hover,
[data-theme="dark"] .btn-upload:hover,
[data-theme="dark"] .level-btn:hover,
[data-theme="dark"] .sel-level-btn:hover,
[data-theme="dark"] .exam-type-tab:hover,
[data-theme="dark"] .type-tab:hover,
[data-theme="dark"] .page-btn:hover,
[data-theme="dark"] .admin-btn:hover,
[data-theme="dark"] .st-btn:hover {
    transform: translateY(-2px);
}
[data-theme="dark"] .btn-outline,
[data-theme="dark"] .sel-level-btn,
[data-theme="dark"] .level-btn {
    background: rgba(255, 255, 255, 0.02);
    border-color: rgba(255, 255, 255, 0.1);
}
[data-theme="dark"] .btn-outline:hover,
[data-theme="dark"] .sel-level-btn:hover,
[data-theme="dark"] .level-btn:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 0 16px rgba(0, 212, 170, 0.15);
}
[data-theme="dark"] .btn-primary,
[data-theme="dark"] .admin-btn.primary,
[data-theme="dark"] .st-btn.primary {
    box-shadow: 0 0 12px rgba(0, 212, 170, 0.25);
}
[data-theme="dark"] .btn-primary:hover,
[data-theme="dark"] .admin-btn.primary:hover,
[data-theme="dark"] .st-btn.primary:hover {
    box-shadow: 0 0 28px rgba(0, 212, 170, 0.5), 0 0 0 2px rgba(0, 212, 170, 0.3);
    transform: translateY(-2px);
}
[data-theme="dark"] .btn-secondary,
[data-theme="dark"] .admin-btn.secondary {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}
[data-theme="dark"] .btn-secondary:hover,
[data-theme="dark"] .admin-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.15);
}

/* ====== 暖白护眼：轻阴影上浮 ====== */
[data-theme="day"] button:hover,
[data-theme="day"] .btn:hover,
[data-theme="day"] .btn-submit:hover,
[data-theme="day"] .btn-guess:hover,
[data-theme="day"] .btn-cancel:hover,
[data-theme="day"] .btn-save:hover,
[data-theme="day"] .btn-upload:hover,
[data-theme="day"] .level-btn:hover,
[data-theme="day"] .sel-level-btn:hover,
[data-theme="day"] .exam-type-tab:hover,
[data-theme="day"] .type-tab:hover,
[data-theme="day"] .page-btn:hover,
[data-theme="day"] .admin-btn:hover,
[data-theme="day"] .st-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
}
[data-theme="day"] .btn-primary,
[data-theme="day"] .admin-btn.primary,
[data-theme="day"] .st-btn.primary {
    box-shadow: 0 2px 10px rgba(13, 110, 253, 0.3);
}
[data-theme="day"] .btn-primary:hover,
[data-theme="day"] .admin-btn.primary:hover,
[data-theme="day"] .st-btn.primary:hover {
    box-shadow: 0 6px 24px rgba(13, 110, 253, 0.45);
}
[data-theme="day"] .btn-outline {
    border-width: 1.5px;
}

/* ====== 淡黄纸：大圆角纸质触感 ====== */
[data-theme="sepia"] button,
[data-theme="sepia"] .btn,
[data-theme="sepia"] .btn-submit,
[data-theme="sepia"] .btn-guess,
[data-theme="sepia"] .btn-cancel,
[data-theme="sepia"] .btn-save,
[data-theme="sepia"] .btn-upload,
[data-theme="sepia"] .level-btn,
[data-theme="sepia"] .sel-level-btn,
[data-theme="sepia"] .exam-type-tab,
[data-theme="sepia"] .type-tab,
[data-theme="sepia"] .page-btn,
[data-theme="sepia"] .admin-btn,
[data-theme="sepia"] .st-btn {
    border-radius: 10px;
    font-weight: 500;
}
[data-theme="sepia"] button:hover,
[data-theme="sepia"] .btn:hover,
[data-theme="sepia"] .btn-submit:hover,
[data-theme="sepia"] .btn-guess:hover,
[data-theme="sepia"] .btn-cancel:hover,
[data-theme="sepia"] .btn-save:hover,
[data-theme="sepia"] .btn-upload:hover,
[data-theme="sepia"] .level-btn:hover,
[data-theme="sepia"] .sel-level-btn:hover,
[data-theme="sepia"] .exam-type-tab:hover,
[data-theme="sepia"] .type-tab:hover,
[data-theme="sepia"] .page-btn:hover,
[data-theme="sepia"] .admin-btn:hover,
[data-theme="sepia"] .st-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(92, 75, 55, 0.15);
}
[data-theme="sepia"] .btn-outline {
    border-width: 2px;
    border-style: solid;
}
[data-theme="sepia"] .btn-primary,
[data-theme="sepia"] .admin-btn.primary,
[data-theme="sepia"] .st-btn.primary {
    box-shadow: 0 2px 10px rgba(181, 137, 0, 0.25);
}
[data-theme="sepia"] .btn-primary:hover,
[data-theme="sepia"] .admin-btn.primary:hover,
[data-theme="sepia"] .st-btn.primary:hover {
    box-shadow: 0 6px 24px rgba(181, 137, 0, 0.4);
}

/* ====== 薄荷绿：弹跳放大 ====== */
[data-theme="mint"] button,
[data-theme="mint"] .btn,
[data-theme="mint"] .btn-submit,
[data-theme="mint"] .btn-guess,
[data-theme="mint"] .btn-cancel,
[data-theme="mint"] .btn-save,
[data-theme="mint"] .btn-upload,
[data-theme="mint"] .level-btn,
[data-theme="mint"] .sel-level-btn,
[data-theme="mint"] .exam-type-tab,
[data-theme="mint"] .type-tab,
[data-theme="mint"] .page-btn,
[data-theme="mint"] .admin-btn,
[data-theme="mint"] .st-btn {
    border-radius: 10px;
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}
[data-theme="mint"] button:hover,
[data-theme="mint"] .btn:hover,
[data-theme="mint"] .btn-submit:hover,
[data-theme="mint"] .btn-guess:hover,
[data-theme="mint"] .btn-cancel:hover,
[data-theme="mint"] .btn-save:hover,
[data-theme="mint"] .btn-upload:hover,
[data-theme="mint"] .level-btn:hover,
[data-theme="mint"] .sel-level-btn:hover,
[data-theme="mint"] .exam-type-tab:hover,
[data-theme="mint"] .type-tab:hover,
[data-theme="mint"] .page-btn:hover,
[data-theme="mint"] .admin-btn:hover,
[data-theme="mint"] .st-btn:hover {
    transform: scale(1.06);
}
[data-theme="mint"] .btn-primary,
[data-theme="mint"] .admin-btn.primary,
[data-theme="mint"] .st-btn.primary {
    box-shadow: 0 3px 16px rgba(34, 197, 94, 0.35);
}
[data-theme="mint"] .btn-primary:hover,
[data-theme="mint"] .admin-btn.primary:hover,
[data-theme="mint"] .st-btn.primary:hover {
    box-shadow: 0 6px 28px rgba(34, 197, 94, 0.5);
}
[data-theme="mint"] .btn-outline:hover {
    border-color: var(--theme-primary);
    color: var(--theme-primary);
}

/* ---------- 基础重置 ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

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

/* ---------- 容器 ---------- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ---------- 导航栏 ---------- */
.navbar {
    background-color: var(--bg-navbar);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: background-color var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    width: 180px;
    flex-shrink: 0;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: block;
    flex: 0 0 auto;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* ---------- 导航菜单 ---------- */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
}

.nav-link {
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

.nav-link.active {
    color: var(--theme-primary);
    background: rgba(13, 110, 253, 0.1);
}

/* ---------- 用户区域 ---------- */
.user-area {
    display: flex;
    align-items: center;
}

.login-btn {
    padding: 8px 20px;
    background: var(--theme-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: 8px;
}

.login-btn:hover {
    background: var(--theme-primary-hover);
    transform: translateY(-1px);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-left: 8px;
}

.user-avatar:hover {
    border-color: var(--theme-primary);
    transform: scale(1.05);
}

.avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ---------- 主题切换器 ---------- */
.theme-switcher {
    position: relative;
}

.theme-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    background-color: var(--bg-card);
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn:hover {
    background-color: var(--bg-hover);
    transform: scale(1.05);
}

.theme-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    width: 200px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 200;
}

.theme-dropdown.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-dropdown-header {
    padding: 8px 12px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 4px;
}

.theme-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.theme-option:hover {
    background-color: var(--bg-hover);
}

.theme-option.active {
    background-color: var(--bg-hover);
}

.theme-option.active .theme-check {
    opacity: 1;
}

.theme-preview {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
}

.day-preview {
    background: linear-gradient(135deg, #F8F9FA 50%, #0D6EFD 50%);
}

.dark-preview {
    background: linear-gradient(135deg, #0D1117 50%, #00D4AA 50%);
}

.sepia-preview {
    background: linear-gradient(135deg, #FDF6E3 50%, #B58900 50%);
}

.mint-preview {
    background: linear-gradient(135deg, #F0FDF4 50%, #22C55E 50%);
}

.theme-name {
    flex: 1;
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.theme-check {
    opacity: 0;
    color: var(--theme-primary);
    font-weight: 700;
    transition: opacity var(--transition-fast);
}

/* ---------- 按钮 ---------- */
.auth-buttons {
    display: flex;
    gap: 10px;
}

.btn {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 1px solid transparent;
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    background-color: var(--bg-hover);
    border-color: var(--text-secondary);
}

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

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

.btn-secondary {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}
.btn-secondary:hover {
    background-color: var(--bg-hover);
    border-color: var(--text-muted);
}

.btn-danger {
    background-color: var(--theme-danger);
    color: white;
    border-color: var(--theme-danger);
}
.btn-danger:hover {
    filter: brightness(1.15);
}

.btn-success {
    background-color: var(--theme-success);
    color: white;
    border-color: var(--theme-success);
}
.btn-success:hover {
    filter: brightness(1.15);
}

.btn-sm {
    padding: 4px 12px;
    font-size: 0.8125rem;
    border-radius: 4px;
}

.btn-lg {
    padding: 12px 28px;
    font-size: 1.0625rem;
    border-radius: var(--radius-md);
}

/* ---------- 主页内容 ---------- */
.main-content {
    min-height: calc(100vh - 64px - 60px);
    padding-bottom: 60px;
}

/* ---------- Hero 区域 ---------- */
.hero-section {
    padding: 48px 0 32px;
}

/* ---------- 三大入口卡片 ---------- */
.portal-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.portal-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    text-align: center;
    position: relative;
    transition: all var(--transition-normal);
    cursor: pointer;
    overflow: hidden;
}

.portal-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background-color: var(--theme-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.gesp-card::before {
    background-color: #22C55E;
}

.cspj-card::before {
    background-color: #0D6EFD;
}

.csps-card::before {
    background-color: #DC3545;
}

.portal-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--theme-primary);
}

.portal-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 16px;
    transition: transform var(--transition-normal);
}

.portal-card:hover .card-icon {
    transform: scale(1.1);
}

.card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.card-subtitle {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.card-levels {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.card-desc {
    font-size: 0.9375rem;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.card-arrow {
    font-size: 1.5rem;
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.portal-card:hover .card-arrow {
    color: var(--theme-primary);
    transform: translateX(4px);
}

/* ---------- 数据看板 ---------- */
.dashboard-section {
    padding: 40px 0;
}

.dashboard-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
}

.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

.dashboard-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.dashboard-tag {
    padding: 4px 12px;
    background-color: var(--theme-primary);
    color: white;
    border-radius: var(--radius-xl);
    font-size: 0.875rem;
    font-weight: 500;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-bottom: 20px;
}

.stat-item {
    text-align: center;
    padding: 16px;
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--theme-primary);
    margin-bottom: 4px;
}

.stat-unit {
    font-size: 1rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.stat-label {
    font-size: 0.9375rem;
    color: var(--text-secondary);
}

.stat-hint {
    font-size: 0.75rem;
    color: var(--theme-danger);
    margin-top: 4px;
}

.stat-links {
    margin-top: 8px;
}

.stat-link {
    font-size: 0.8125rem;
    color: var(--theme-primary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.stat-link:hover {
    opacity: 0.8;
    text-decoration: underline;
}

.stat-link.error-link {
    color: var(--theme-danger);
}

.stat-error {
    color: var(--theme-danger) !important;
}

.stat-placeholder {
    opacity: 0.6;
}

.stat-tip {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
    padding: 2px 8px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    display: inline-block;
}

.dashboard-alert {
    padding: 12px 16px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border-left: 4px solid var(--theme-warning);
    font-size: 0.9375rem;
    color: var(--text-primary);
}

/* ---------- 站点动态 ---------- */
.news-section {
    padding: 40px 0;
}

.section-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.news-list {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.news-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-light);
    transition: background-color var(--transition-fast);
}

.news-item:last-child {
    border-bottom: none;
}

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

.news-badge {
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    flex-shrink: 0;
}

.news-badge.new {
    background-color: var(--theme-primary);
    color: white;
}

.news-badge.event {
    background-color: var(--theme-warning);
    color: #212529;
}

.news-badge.tip {
    background-color: var(--theme-success);
    color: white;
}

.news-text {
    flex: 1;
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.news-time {
    font-size: 0.8125rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* ---------- 页脚 ---------- */
.footer {
    background-color: var(--bg-navbar);
    border-top: 1px solid var(--border-color);
    padding: 20px 0;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
    .portal-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .nav-container {
        padding: 0 16px;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .portal-grid {
        grid-template-columns: 1fr;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .theme-dropdown {
        right: -60px;
    }
}