/* ==================== 升级版玻璃拟态 UI 系统 ==================== */
/* 设计理念：现代深蓝玻璃质感 + 动态渐变 + 多层次深度 */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=DM+Sans:wght@400;500;600;700&display=swap');

/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 移除所有按钮和链接的下划线 */
button, .card-btn, .game-btn, .homework-btn, .card-action {
    text-decoration: none !important;
    border: none !important;
    outline: none !important;
}

/* 移除所有卡片的下划线 */
.card, .game-card, .homework-card {
    text-decoration: none !important;
    border: none !important;
}

.card *, .game-card *, .homework-card * {
    text-decoration: none !important;
    border: none !important;
    outline: none !important;
}

.homework-title, .homework-desc, .homework-btn {
    text-decoration: none !important;
    border: none !important;
    outline: none !important;
}

/* 特别移除所有可能的下划线 */
a, button, .btn, input[type="button"], input[type="submit"] {
    text-decoration: none !important;
    border-bottom: none !important;
}

.homework-card a,
.homework-card button,
.homework-card .homework-btn {
    text-decoration: none !important;
    border: none !important;
    outline: none !important;
}

:root {
    /* 升级版浅色主题 */
    --bg-primary: #FAFAFA;
    --bg-secondary: #F5F5F7;
    --bg-tertiary: #E8E8ED;

    /* 文字颜色 - 更高对比度 */
    --text-primary: #09090B;
    --text-secondary: #3F3F46;
    --text-tertiary: #71717A;

    /* 边框和阴影 */
    --border-color: #E4E4E7;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.15);

    /* 品牌色 - 深蓝渐变系 */
    --accent-primary: #0EA5E9;
    --accent-secondary: #6366F1;
    --accent-gradient: linear-gradient(135deg, #0EA5E9 0%, #6366F1 100%);
    --accent-hover: #0284C7;

    /* 玻璃拟态效果 */
    --glass-bg-light: rgba(255, 255, 255, 0.75);
    --glass-bg-dark: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    --glass-blur: blur(20px);

    /* 光晕效果 */
    --glow-primary: 0 0 40px rgba(14, 165, 233, 0.15);
    --glow-secondary: 0 0 40px rgba(99, 102, 241, 0.15);

    /* 状态色 */
    --success-color: #10B981;
    --error-color: #EF4444;
    --warning-color: #F59E0B;
    --info-color: #3B82F6;

    /* 动画时长 */
    --transition-fast: 150ms;
    --transition-base: 200ms;
    --transition-slow: 300ms;
}

[data-theme="dark"] {
    /* 升级版深色主题 - 深蓝玻璃质感 */
    --bg-primary: #0A0E1A;
    --bg-secondary: #121826;
    --bg-tertiary: #1A2234;

    /* 文字颜色 */
    --text-primary: #FAFAFA;
    --text-secondary: #A1A1AA;
    --text-tertiary: #71717A;

    /* 边框和阴影 */
    --border-color: rgba(255, 255, 255, 0.08);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.6);

    /* 玻璃拟态效果 - 深色模式 */
    --glass-bg-light: rgba(18, 24, 38, 0.75);
    --glass-bg-dark: rgba(26, 34, 52, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    --glass-blur: blur(24px);

    /* 光晕效果 - 深色模式增强 */
    --glow-primary: 0 0 60px rgba(14, 165, 233, 0.25);
    --glow-secondary: 0 0 60px rgba(99, 102, 241, 0.25);
}

/* ==================== 动态背景 ==================== */
body {
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--transition-slow) ease, color var(--transition-slow) ease;
    position: relative;
    overflow-x: hidden;
}

/* Aurora 渐变背景 - 已禁用 */
/*
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 80%, rgba(14, 165, 233, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 40% 40%, rgba(236, 72, 153, 0.05) 0%, transparent 30%);
    animation: aurora 15s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] body::before {
    background:
        radial-gradient(circle at 20% 80%, rgba(14, 165, 233, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 40% 40%, rgba(236, 72, 153, 0.08) 0%, transparent 30%);
}

@keyframes aurora {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    33% {
        transform: translate(5%, 5%) rotate(120deg);
    }
    66% {
        transform: translate(-5%, 5%) rotate(240deg);
    }
}
*/

/* ==================== 导航栏 - 玻璃拟态 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: 16px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;

    /* 玻璃拟态效果 */
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);

    /* 阴影和光晕 */
    box-shadow: var(--shadow-sm);

    transition: all var(--transition-slow) ease;
}

.navbar:hover {
    box-shadow: var(--shadow-md), var(--glow-primary);
}

.logo {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: all var(--transition-base) ease;
    cursor: pointer;
}

.logo:hover {
    filter: brightness(1.2);
    transform: scale(1.02);
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-base) ease;
    position: relative;
    padding: 8px 0;
    cursor: pointer;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-base) ease;
    border-radius: 2px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* 汉堡菜单按钮 */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 6px;
    z-index: 1001;
    padding: 8px;
    border-radius: 8px;
    transition: background var(--transition-base) ease;
}

.hamburger:hover {
    background: var(--bg-tertiary);
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* 主题切换按钮 */
.theme-toggle {
    background: var(--glass-bg-dark);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 10px 16px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    transition: all var(--transition-base) ease;
    margin-right: 12px;
    box-shadow: var(--shadow-sm);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.admin-btn {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.admin-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--glow-primary);
}

/* ==================== 主容器 ==================== */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 100px 60px 60px;
    position: relative;
    z-index: 1;
}

/* ==================== Hero Section ==================== */
.hero {
    text-align: center;
    margin-bottom: 80px;
    padding: 80px 20px;
    position: relative;
    overflow: hidden;
}

/* Hero 光晕效果 */
/* Hero 区域 - 已禁用脉冲动画 */
/*
.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(14, 165, 233, 0.12) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
    pointer-events: none;
}

[data-theme="dark"] .hero::before {
    background: radial-gradient(circle, rgba(14, 165, 233, 0.2) 0%, transparent 70%);
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.4;
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}
*/

.hero h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 16px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease;
    position: relative;
}

.hero p {
    font-size: 1rem;
    color: var(--text-secondary);
    letter-spacing: 4px;
    font-weight: 500;
    text-transform: uppercase;
    animation: fadeInUp 0.8s ease 0.2s both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 卡片网格 ==================== */
.cards-grid,
.games-grid,
.homework-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 24px;
    margin-bottom: 60px;
}

.games-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* ==================== 玻璃拟态卡片 ==================== */
.card, .game-card, .homework-card {
    /* 玻璃拟态背景 */
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);

    border-radius: 20px;
    overflow: hidden;

    /* 渐变边框 */
    border: 1px solid var(--glass-border);
    position: relative;

    transition: all var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;

    /* 初始阴影 */
    box-shadow: var(--shadow-md);
}

/* 卡片悬停效果 */
.card:hover, .game-card:hover, .homework-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl), var(--glow-primary);
    border-color: rgba(14, 165, 233, 0.3);
}

/* 卡片光晕 */
.card::before, .game-card::before, .homework-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition-slow) ease;
    pointer-events: none;
    border-radius: 20px;
}

.card:hover::before, .game-card:hover::before, .homework-card:hover::before {
    opacity: 1;
}

.card-icon, .game-icon, .homework-icon {
    font-size: 3.5rem;
    padding: 48px;
    text-align: center;
    background: var(--glass-bg-dark);
    margin-bottom: 24px;
    transition: transform var(--transition-slow) ease;
}

.game-icon, .homework-icon {
    font-size: 4.5rem;
    padding: 56px 24px;
}

.card:hover .card-icon,
.game-card:hover .game-icon,
.homework-card:hover .homework-icon {
    transform: scale(1.1);
}

.card-content, .game-info, .homework-info {
    padding: 32px;
    text-align: center;
}

.card-title, .game-title, .homework-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.game-title, .homework-title {
    font-size: 1.5rem;
}

.card-desc, .game-desc, .homework-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.card-action {
    color: var(--text-tertiary);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 1px;
    text-transform: uppercase;
    text-decoration: none;
}

/* ==================== 按钮样式 ==================== */
.card-btn, .game-btn, .homework-btn {
    background: var(--accent-gradient);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
    text-decoration: none;
}

.card-btn:hover, .game-btn:hover, .homework-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--glow-primary);
}

.game-btn, .homework-btn {
    padding: 10px 24px;
    font-size: 0.9rem;
}

/* ==================== 页面切换 ==================== */
.page {
    display: none;
    animation: fadeIn 0.5s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==================== 页脚 ==================== */
.footer {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-tertiary);
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
    transition: border-color var(--transition-slow) ease;
    position: relative;
    z-index: 1;
}

/* ==================== 文件管理样式 ==================== */
.file-login-container {
    max-width: 520px;
    margin: 0 auto;
    padding: 40px;
}

.file-login-box {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 48px;
    border-radius: 24px;
    text-align: center;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
}

.file-login-box h3 {
    font-family: 'Space Grotesk', sans-serif;
    margin-bottom: 24px;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.file-login-box input {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    margin: 20px 0;
    background: var(--bg-secondary);
    color: var(--text-primary);
    transition: all var(--transition-base) ease;
    font-family: 'DM Sans', sans-serif;
}

.file-login-box input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.file-login-box button {
    width: 100%;
    padding: 14px;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.file-login-box button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md), var(--glow-primary);
}

.file-login-error {
    color: var(--error-color);
    font-size: 0.9rem;
    margin-top: 16px;
    display: none;
}

.file-login-error.show {
    display: block;
}

.file-manager {
    display: none;
}

.file-manager.show {
    display: block;
}

.file-actions-bar {
    margin-bottom: 32px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.file-actions-bar button {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 12px 24px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.file-actions-bar button:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

#file-upload-input {
    display: none;
}

.file-list {
    display: grid;
    gap: 16px;
}

.file-item {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    padding: 20px 24px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all var(--transition-base) ease;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
}

.file-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.file-info {
    flex: 1;
}

.file-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    font-size: 1rem;
}

.file-meta {
    font-size: 0.85rem;
    color: var(--text-tertiary);
}

.file-actions {
    display: flex;
    gap: 10px;
}

.file-actions button {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all var(--transition-base) ease;
}

.file-actions button:hover {
    transform: translateY(-1px);
}

.btn-download {
    background: var(--success-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-delete {
    background: var(--error-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.loading-state, .empty-state {
    text-align: center;
    color: var(--text-tertiary);
    padding: 48px;
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

/* ==================== 留言板样式 ==================== */
.guestbook-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}

.guestbook-form {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    padding: 36px;
    border-radius: 24px;
    margin-bottom: 48px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
}

.guestbook-form h3 {
    font-family: 'Space Grotesk', sans-serif;
    margin-bottom: 24px;
    font-size: 1.5rem;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 600;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 1rem;
    font-family: 'DM Sans', sans-serif;
    transition: all var(--transition-base) ease;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.btn-submit {
    padding: 14px 32px;
    font-size: 1rem;
    width: 100%;
}

.btn-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.message-card {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 28px;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.message-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.message-author {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.message-time {
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.message-content {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 16px;
}

.message-actions {
    display: flex;
    gap: 16px;
    align-items: center;
}

.btn-reply, .btn-delete {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
    padding: 0;
    font-weight: 600;
    transition: opacity var(--transition-base) ease;
}

.btn-reply {
    color: var(--info-color);
}

.btn-delete {
    color: var(--error-color);
}

.btn-reply:hover, .btn-delete:hover {
    opacity: 0.7;
}

.reply-form {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.replies-list {
    margin-top: 16px;
    padding-left: 20px;
    border-left: 2px solid var(--border-color);
}

.reply-item {
    padding: 16px 0;
    border-bottom: 1px solid var(--border-color);
}

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

.reply-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.reply-author {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.reply-time {
    color: var(--text-tertiary);
    font-size: 0.8rem;
}

.reply-content {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.error-message {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error-color);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.success-message {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ==================== 学习资源样式 ==================== */
.resources-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 20px;
}

.resources-categories {
    display: flex;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
    justify-content: center;
}

.category-btn {
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur);
    color: var(--text-secondary);
    border: 1px solid var(--glass-border);
    padding: 12px 24px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all var(--transition-base) ease;
}

.category-btn:hover, .category-btn.active {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.resource-card {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    border-radius: 20px;
    padding: 28px;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.resource-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.resource-category {
    display: inline-block;
    background: var(--accent-gradient);
    color: white;
    padding: 6px 14px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.resource-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.resource-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 16px;
    line-height: 1.6;
}

.resource-url {
    color: var(--accent-primary);
    font-size: 0.85rem;
    word-break: break-all;
    font-weight: 600;
}

/* ==================== 博客样式 ==================== */
.blog-container {
    max-width: 960px;
    margin: 0 auto;
    padding: 20px;
}

.blog-header {
    text-align: center;
    margin-bottom: 56px;
}

.blog-grid {
    display: grid;
    gap: 32px;
}

.blog-card {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-base) ease;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl), var(--glow-primary);
}

.blog-image {
    width: 100%;
    height: 240px;
    background: var(--glass-bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.blog-content {
    padding: 32px;
}

.blog-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.blog-excerpt {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 16px;
}

.blog-meta {
    display: flex;
    gap: 16px;
    color: var(--text-tertiary);
    font-size: 0.85rem;
}

.blog-tags {
    display: flex;
    gap: 8px;
    margin-top: 16px;
    flex-wrap: wrap;
}

.blog-tag {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* ==================== 关于页面 ==================== */
.about-container {
    max-width: 880px;
    margin: 0 auto;
    padding: 40px 20px;
}

.about-card {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    border-radius: 24px;
    padding: 48px;
    border: 1px solid var(--glass-border);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.about-avatar {
    width: 128px;
    height: 128px;
    border-radius: 50%;
    background: var(--glass-bg-dark);
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    border: 3px solid var(--glass-border);
    box-shadow: var(--shadow-md);
}

.about-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.about-bio {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 36px;
    font-size: 1.05rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 36px;
}

.stat-item {
    text-align: center;
    padding: 24px;
    background: var(--glass-bg-dark);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

.stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.social-links {
    display: flex;
    gap: 16px;
    justify-content: center;
}

.social-link {
    width: 52px;
    height: 52px;
    border-radius: 14px;
    background: var(--glass-bg-dark);
    backdrop-filter: var(--glass-blur);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: all var(--transition-base) ease;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    background: var(--accent-gradient);
    color: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-md), var(--glow-primary);
}

/* ==================== 排行榜样式 ==================== */
.leaderboard {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    border-radius: 24px;
    padding: 32px;
    border: 1px solid var(--glass-border);
    margin-top: 36px;
    box-shadow: var(--shadow-lg);
}

.leaderboard h3 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.game-leaderboard-section {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.game-leaderboard-section:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.game-leaderboard-section h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.leaderboard-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    background: var(--glass-bg-dark);
    border-radius: 12px;
    margin-bottom: 12px;
    border: 1px solid var(--glass-border);
    transition: all var(--transition-base) ease;
}

.leaderboard-item:hover {
    transform: translateX(4px);
    border-color: var(--accent-primary);
}

.leaderboard-rank {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: 1.2rem;
    min-width: 32px;
}

.leaderboard-name {
    flex: 1;
    color: var(--text-primary);
    font-weight: 600;
    padding: 0 16px;
}

.leaderboard-score {
    font-weight: 700;
    color: var(--text-tertiary);
    font-family: 'Space Grotesk', sans-serif;
}

/* ==================== 表情选择器 ==================== */
.emoji-picker {
    display: none;
    position: absolute;
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 12px;
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.emoji-picker.show {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 6px;
}

.emoji-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 6px;
    border-radius: 8px;
    transition: background var(--transition-base) ease;
}

.emoji-btn:hover {
    background: var(--bg-tertiary);
    transform: scale(1.2);
}

/* ==================== 加载动画 ==================== */
.spinner {
    border: 3px solid var(--border-color);
    border-top: 3px solid transparent;
    border-radius: 50%;
    width: 48px;
    height: 48px;
    animation: spin 1s linear infinite;
    margin: 24px auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .navbar {
        padding: 12px 20px;
    }

    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-secondary);
        backdrop-filter: var(--glass-blur);
        flex-direction: column;
        padding: 100px 32px;
        gap: 24px;
        transition: right var(--transition-slow) ease;
        box-shadow: var(--shadow-xl);
        border-left: 1px solid var(--glass-border);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 12px 0;
    }

    .container {
        padding: 100px 20px 40px;
    }

    .hero h1 {
        font-size: 2.5rem;
        letter-spacing: -1px;
    }

    .cards-grid,
    .games-grid,
    .homework-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .file-login-box {
        padding: 32px 24px;
    }

    .guestbook-form {
        padding: 24px;
    }

    .about-card {
        padding: 32px 24px;
    }
}

/* ==================== 汇率转换器 Widget ==================== */
.currency-widget-container {
    max-width: 580px;
    margin: 0 auto 60px;
}

.currency-widget {
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 24px;
    padding: 36px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-slow) ease;
}

.currency-widget:hover {
    box-shadow: var(--shadow-xl), var(--glow-primary);
    transform: translateY(-4px);
}

/* Widget Header */
.currency-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.currency-icon {
    width: 52px;
    height: 52px;
    background: var(--accent-gradient);
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-sm);
    flex-shrink: 0;
}

.currency-title-group {
    flex: 1;
}

.currency-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    letter-spacing: -0.5px;
}

.currency-subtitle {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.refresh-btn {
    background: var(--glass-bg-dark);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base) ease;
    flex-shrink: 0;
}

.refresh-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: rotate(180deg);
}

.refresh-btn:active {
    transform: rotate(180deg) scale(0.95);
}

/* Converter */
.currency-converter {
    margin-bottom: 28px;
}

.converter-row {
    display: grid;
    grid-template-columns: 1fr 140px;
    gap: 12px;
    margin-bottom: 8px;
}

.amount-group,
.currency-select-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.amount-group label,
.currency-select-group label {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.amount-group input {
    width: 100%;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    transition: all var(--transition-base) ease;
}

.amount-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.amount-group input[readonly] {
    background: var(--glass-bg-dark);
    color: var(--accent-primary);
}

.currency-select-group select {
    width: 100%;
    padding: 14px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'DM Sans', sans-serif;
    cursor: pointer;
    transition: all var(--transition-base) ease;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2371717A' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.currency-select-group select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.currency-select-group select:hover {
    border-color: var(--accent-secondary);
}

/* Swap Button */
.swap-container {
    display: flex;
    justify-content: center;
    margin: 4px 0;
}

.swap-btn {
    background: var(--accent-gradient);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: white;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.swap-btn:hover {
    transform: rotate(180deg) scale(1.1);
    box-shadow: var(--shadow-md), var(--glow-primary);
}

.swap-btn:active {
    transform: rotate(180deg) scale(0.95);
}

/* Rate Display */
.rate-display {
    background: var(--glass-bg-dark);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
}

.rate-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.rate-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.rate-value {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--accent-primary);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.rate-update {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Currency Rates List */
.currency-rates {
    background: var(--glass-bg-dark);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 20px;
}

.rates-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    letter-spacing: -0.3px;
}

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

.rate-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all var(--transition-base) ease;
}

.rate-item:hover {
    transform: translateX(4px);
    border-color: var(--accent-primary);
}

.rate-item.loading {
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

.rate-pair {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.rate-flag {
    font-size: 1.2rem;
}

.rate-amount {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: var(--accent-primary);
    font-size: 1rem;
}

/* Loading Animation */
@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

.rate-item.loading {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
}

/* Error State */
.rate-error {
    color: var(--error-color);
    font-size: 0.9rem;
    text-align: center;
    padding: 20px;
}

/* ==================== 工具箱侧边栏 ==================== */
.main-wrapper {
    transition: margin-right var(--transition-slow) ease;
}

/* 切换按钮 */
.toolbox-toggle {
    position: fixed;
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border: none;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    z-index: 999;
    box-shadow: var(--shadow-lg), var(--glow-primary);
    transition: all var(--transition-base) ease;
}

.toolbox-toggle:hover {
    transform: translateY(-50%) scale(1.1);
    box-shadow: var(--shadow-xl), var(--glow-secondary);
}

/* 侧边栏 */
.toolbox-sidebar {
    position: fixed;
    top: 0;
    right: -360px;
    width: 360px;
    height: 100vh;
    background: var(--glass-bg-light);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-left: 1px solid var(--glass-border);
    box-shadow: var(--shadow-xl);
    z-index: 998;
    transition: right var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
}

.toolbox-sidebar.open {
    right: 0;
}

/* 侧边栏头部 */
.toolbox-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.toolbox-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.toolbox-close {
    background: none;
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base) ease;
}

.toolbox-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* 标签页 */
.toolbox-tabs {
    display: flex;
    padding: 12px 8px;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
    background: var(--glass-bg-dark);
}

.toolbox-tab {
    flex: 1;
    background: none;
    border: none;
    padding: 12px 8px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base) ease;
}

.toolbox-tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.toolbox-tab.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* 工具面板容器 */
.toolbox-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.toolbox-content::-webkit-scrollbar {
    width: 6px;
}

.toolbox-content::-webkit-scrollbar-track {
    background: transparent;
}

.toolbox-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.tool-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tool-panel.active {
    display: block;
}

/* ==================== 天气 Widget ==================== */
.weather-widget {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid var(--border-color);
}

.weather-location {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 16px;
}

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

.weather-icon {
    font-size: 4rem;
}

.weather-temp {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.weather-details {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.weather-detail-item {
    background: var(--glass-bg-dark);
    padding: 12px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--glass-border);
}

.weather-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-tertiary);
    margin-bottom: 4px;
    text-transform: uppercase;
}

.weather-value {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.weather-description {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-top: 12px;
    border-top: 1px solid var(--border-color);
}

/* ==================== 汇率转换器（紧凑版）==================== */
.currency-widget-compact {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 16px;
    border: 1px solid var(--border-color);
}

.currency-header-compact {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.currency-header-compact h4 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.refresh-icon {
    background: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base) ease;
}

.refresh-icon:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    transform: rotate(180deg);
}

.converter-compact {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
}

.converter-row-compact {
    display: grid;
    grid-template-columns: 1fr 100px;
    gap: 8px;
}

.converter-row-compact input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    transition: all var(--transition-base) ease;
}

.converter-row-compact input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.converter-row-compact input[readonly] {
    background: var(--glass-bg-dark);
    color: var(--accent-primary);
}

.converter-row-compact select {
    width: 100%;
    padding: 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-base) ease;
}

.swap-btn-compact {
    background: var(--accent-gradient);
    border: none;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    color: white;
    cursor: pointer;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.swap-btn-compact:hover {
    transform: rotate(180deg) scale(1.1);
    box-shadow: var(--shadow-md);
}

.rate-display-compact {
    background: var(--glass-bg-dark);
    padding: 12px;
    border-radius: 12px;
    margin-bottom: 12px;
    text-align: center;
}

.rate-display-compact span {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 0.9rem;
}

.rates-list-compact {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.rate-item-compact {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    background: var(--bg-primary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.rate-item-compact span:last-child {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    color: var(--accent-primary);
}

/* ==================== 计算器 ==================== */
.calculator {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 16px;
    border: 1px solid var(--border-color);
}

.calculator-display {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    text-align: right;
    border: 1px solid var(--border-color);
}

.calculator-expression {
    min-height: 20px;
    font-size: 0.85rem;
    color: var(--text-tertiary);
    margin-bottom: 8px;
    font-family: 'Space Grotesk', sans-serif;
}

.calculator-result {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    word-wrap: break-word;
}

.calculator-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.calc-btn {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    padding: 16px 8px;
    border-radius: 10px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    font-family: 'Space Grotesk', sans-serif;
    cursor: pointer;
    transition: all var(--transition-base) ease;
}

.calc-btn:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
}

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

.calc-btn-operator {
    background: var(--glass-bg-dark);
    color: var(--accent-primary);
}

.calc-btn-clear {
    background: var(--error-color);
    color: white;
    border: none;
}

.calc-btn-equals {
    background: var(--accent-gradient);
    color: white;
    border: none;
    grid-column: span 2;
}

.calc-btn-zero {
    grid-column: span 2;
}

/* ==================== 日语词典 ==================== */
.dictionary-widget {
    background: var(--bg-secondary);
    border-radius: 16px;
    padding: 16px;
    border: 1px solid var(--border-color);
}

.dictionary-search {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.dictionary-search input {
    flex: 1;
    padding: 12px 14px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: all var(--transition-base) ease;
}

.dictionary-search input:focus {
    outline: none;
    border-color: var(--accent-primary);
}

.dictionary-search button {
    background: var(--accent-gradient);
    border: none;
    width: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    cursor: pointer;
    transition: all var(--transition-base) ease;
    box-shadow: var(--shadow-sm);
}

.dictionary-search button:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.dictionary-result {
    min-height: 200px;
    max-height: 400px;
    overflow-y: auto;
}

.dict-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 200px;
    color: var(--text-tertiary);
}

.dict-placeholder svg {
    margin-bottom: 12px;
    opacity: 0.5;
}

.dict-placeholder p {
    font-size: 0.9rem;
}

.dict-entry {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
}

.dict-word {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.dict-reading {
    color: var(--accent-primary);
    font-size: 1rem;
    margin-bottom: 8px;
}

.dict-definitions {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dict-definition {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    padding-left: 12px;
    border-left: 2px solid var(--accent-primary);
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .navbar {
        padding: 12px 20px;
    }

    .hamburger {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 320px;
        height: 100vh;
        background: var(--bg-secondary);
        backdrop-filter: var(--glass-blur);
        flex-direction: column;
        padding: 100px 32px;
        gap: 24px;
        transition: right var(--transition-slow) ease;
        box-shadow: var(--shadow-xl);
        border-left: 1px solid var(--glass-border);
    }

    .nav-links.active {
        right: 0;
    }

    .nav-links a {
        font-size: 1.1rem;
        padding: 12px 0;
    }

    .container {
        padding: 100px 20px 40px;
    }

    .hero h1 {
        font-size: 2.5rem;
        letter-spacing: -1px;
    }

    .cards-grid,
    .games-grid,
    .homework-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
    }

    .file-login-box {
        padding: 32px 24px;
    }

    .guestbook-form {
        padding: 24px;
    }

    .about-card {
        padding: 32px 24px;
    }

    /* Toolbox Sidebar Mobile */
    .toolbox-toggle {
        top: auto;
        bottom: 20px;
        right: 20px;
        transform: none;
    }

    .toolbox-toggle:hover {
        transform: scale(1.1);
    }

    .toolbox-sidebar {
        width: 100%;
        right: -100%;
    }

    .toolbox-sidebar.open {
        right: 0;
    }
}

/* ==================== 减少动画偏好 ==================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    body::before {
        animation: none;
    }

    .hero::before {
        animation: none;
    }
}

/* ==================== 可访问性改进 ==================== */
/* 键盘导航焦点样式 */
*:focus-visible {
    outline: 2px solid var(--accent-primary) !important;
    outline-offset: 2px !important;
}

/* 所有可点击元素添加指针 */
button, a, .card, .game-card, .homework-card, input[type="button"], input[type="submit"] {
    cursor: pointer;
}

/* 确保按钮有最小点击区域 */
button, .card-btn, .game-btn, .homework-btn {
    min-height: 44px;
    min-width: 44px;
}

/* 跳转到主内容链接（键盘导航） */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-primary);
    color: white;
    padding: 8px 16px;
    z-index: 10000;
    text-decoration: none;
}

.skip-to-content:focus {
    top: 0;
}