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

body {
    font-family: 'Segoe UI', 'Poppins', system-ui, -apple-system, 'Inter', sans-serif;
    background: #0a0a2a;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow-x: hidden;
    transition: background-color 0.3s ease;
}

/* ========== 科技感动态粒子背景（仅科技主题） ========== */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(100, 0, 255, 0.08) 0%, transparent 50%),
        repeating-linear-gradient(45deg, rgba(0, 255, 255, 0.02) 0px, rgba(0, 255, 255, 0.02) 2px, transparent 2px, transparent 8px);
    z-index: -2;
    pointer-events: none;
}

body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" opacity="0.05"><path fill="none" stroke="%2300ffff" stroke-width="0.5" d="M10 10 L90 10 M10 20 L90 20 M10 30 L90 30 M10 40 L90 40 M10 50 L90 50 M10 60 L90 60 M10 70 L90 70 M10 80 L90 80 M10 90 L90 90 M10 10 L10 90 M20 10 L20 90 M30 10 L30 90 M40 10 L40 90 M50 10 L50 90 M60 10 L60 90 M70 10 L70 90 M80 10 L80 90 M90 10 L90 90"/></svg>');
    background-size: 30px 30px;
    z-index: -1;
    pointer-events: none;
}

/* ========== Header 样式 ========== */
header {
    background: rgba(10, 10, 42, 0.8);
    backdrop-filter: blur(12px);
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    border-bottom: 1px solid rgba(0, 255, 255, 0.2);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: all 0.3s ease;
}

/* ========== 左上角图标与文字同行 ========== */
.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    line-height: 1;
}

.logo-icon svg {
    display: block;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
}

.logo-main {
    font-size: 1.3rem;
    font-weight: 700;
    background: linear-gradient(135deg, #00ffff, #8b00ff, #00ffff);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: gradientShift 3s ease infinite;
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 0.7rem;
    color: #00ccff;
    margin-top: 2px;
    letter-spacing: 2px;
    opacity: 0.8;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* ========== 带图标的导航菜单 ========== */
nav {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    flex-wrap: wrap;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    text-decoration: none;
    color: var(--text-primary, #ccd6f6);
    transition: all 0.3s ease;
    font-weight: 500;
}

.nav-icon {
    font-size: 1.1rem;
}

.nav-text {
    font-size: 0.9rem;
}

.nav-item:hover {
    background: rgba(0, 255, 255, 0.1);
    color: var(--gradient-start, #00ffff);
    transform: translateY(-2px);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-mid));
    color: white;
}

.theme-toggle {
    cursor: pointer;
}

main {
    flex: 1;
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    width: 100%;
    z-index: 1;
}

/* ========== 首页样式 ========== */
.home-main {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 50vh;
    padding-top: 0;  
}

.slogan {
    margin-bottom: 0;  /* 添加这一行，移除默认底部边距 */
}

.slogan h1 {
    font-size: 4rem;
    background: linear-gradient(135deg, #00ffff, #8b00ff, #ff00cc);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.5rem;
    animation: gradientShift 3s ease infinite;
    letter-spacing: 4px;
}

.slogan .highlight {
    background: linear-gradient(135deg, #ff00cc, #ffcc00);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.slogan p {
    font-size: 1.3rem;
    color: #ccd6f6;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.slogan-sub {
    font-size: 1rem;
    color: #00ffff;
    margin-bottom: 0.8rem;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.home-buttons {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.btn {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    border-radius: 3rem;
    text-decoration: none;
    transition: 0.3s;
    font-weight: 600;
    backdrop-filter: blur(5px);
    letter-spacing: 1px;
}

/* 工具探索按钮 - 青蓝色 */
.btn-primary {
    background: linear-gradient(135deg, #00ffff20, #8b00ff20);
    color: #00ffff;
    border: 1px solid #00ffff;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.btn-primary::before {
    content: '🔍';
    margin-right: 8px;
}

/* 技能学习按钮 - 橙色 */
.btn-skill {
    background: linear-gradient(135deg, #f59e0b20, #d9770620);
    color: #f59e0b;
    border: 1px solid #f59e0b;
    box-shadow: 0 0 15px rgba(245, 158, 11, 0.3);
}

.btn-skill::before {
    content: '📚';
    margin-right: 8px;
}

/* 技术分享按钮 - 粉紫色 */
.btn-secondary {
    background: linear-gradient(135deg, #8b00ff20, #ff00cc20);
    color: #ff00cc;
    border: 1px solid #ff00cc;
    box-shadow: 0 0 15px rgba(255, 0, 204, 0.3);
}

.btn-secondary::before {
    content: '📤';
    margin-right: 8px;
}

/* 统一悬停效果 */
.btn-primary:hover, .btn-skill:hover, .btn-secondary:hover {
    transform: translateY(-3px);
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.6);
    background: linear-gradient(135deg, #00ffff30, #8b00ff30);
}

.btn-skill:hover {
    box-shadow: 0 0 30px rgba(245, 158, 11, 0.6);
    background: linear-gradient(135deg, #f59e0b30, #d9770630);
}

.btn-secondary:hover {
    box-shadow: 0 0 30px rgba(255, 0, 204, 0.6);
    background: linear-gradient(135deg, #8b00ff30, #ff00cc30);
}

/* ========== 统计信息条（完全无背景，纯文字） ========== */
.stats-info-bar {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: baseline;
    gap: 0.8rem 1.5rem;
    margin-top: 2.5rem;
    font-size: 1rem;
    background: transparent !important;
    background-color: transparent !important;
    backdrop-filter: none !important;
    border: none !important;
    padding: 0 !important;
    border-radius: 0 !important;
    box-shadow: none !important;
}

.stat-item {
    display: inline-flex;
    align-items: baseline;
    gap: 0.4rem;
    background: transparent !important;
}

.stat-number {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, #00ffff, #8b00ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 1px;
}

.stat-label {
    font-size: 0.95rem;
    color: #a0b0d0;
    font-weight: 500;
    background: transparent !important;
}

.stat-divider {
    color: #4a5b8e;
    opacity: 0.6;
    font-size: 0.9rem;
}

/* 清爽主题下的统计颜色 */
body.light-theme .stat-number {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

body.light-theme .stat-label {
    color: #64748b;
}

body.light-theme .stat-divider {
    color: #94a3b8;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .stats-info-bar {
        gap: 0.5rem 1rem;
        margin-top: 1.5rem;
    }
    
    .stat-number {
        font-size: 1.1rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
}

/* ========== 页面头部 ========== */
.page-header {
    text-align: center;
    margin-bottom: 2rem;
}

.page-header h2 {
    font-size: 2rem;
    background: linear-gradient(135deg, #00ffff, #8b00ff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

/* ========== 控制栏 ========== */
.control-bar {
    background: rgba(10, 10, 42, 0.6);
    backdrop-filter: blur(10px);
    border-radius: 1rem;
    padding: 1rem;
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    border: 1px solid rgba(0, 255, 255, 0.2);
}

.search-box input {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid #00ffff40;
    border-radius: 2rem;
    font-size: 0.9rem;
    outline: none;
    background: rgba(10, 10, 42, 0.8);
    color: #00ffff;
    transition: 0.3s;
}

.search-box input:focus {
    border-color: #00ffff;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.search-box input::placeholder {
    color: #4a5b8e;
}

.category-select select {
    width: 100%;
    padding: 0.7rem 1rem;
    border: 1px solid #00ffff40;
    border-radius: 2rem;
    font-size: 0.9rem;
    outline: none;
    background: rgba(10, 10, 42, 0.8);
    color: #00ffff;
    cursor: pointer;
}

.stats-badge {
    color: #00ffff;
    font-size: 0.85rem;
    background: rgba(0, 255, 255, 0.1);
    padding: 0.3rem 1rem;
    border-radius: 2rem;
    white-space: nowrap;
    border: 1px solid #00ffff40;
}

/* ========== 卡片网格 ========== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.8rem;
    margin-top: 1rem;
}

/* ========== 卡片样式 ========== */
.card {
    background: rgba(10, 10, 42, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 1.2rem;
    padding: 1.5rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 255, 255, 0.2);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #00ffff, #8b00ff, #ff00cc);
    animation: scanLine 3s linear infinite;
}

@keyframes scanLine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.card:hover {
    transform: translateY(-8px);
    border-color: #00ffff;
    box-shadow: 0 20px 40px rgba(0, 255, 255, 0.2);
}

.card-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: flex-start !important;
    margin-bottom: 0.8rem !important;
    gap: 1rem !important;
    width: 100% !important;
}

.card-category {
    background: linear-gradient(135deg, #00ffff20, #8b00ff20) !important;
    color: #00ffff !important;
    padding: 0.3rem 1rem !important;
    border-radius: 2rem !important;
    font-size: 0.7rem !important;
    font-weight: 600 !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    border: 1px solid #00ffff40 !important;
}

.card-title {
    font-weight: 700 !important;
    font-size: 1.05rem !important;
    color: #ffffff !important;
    text-align: right !important;
    word-break: break-word !important;
    flex: 1 !important;
    line-height: 1.4 !important;
}

.card-author {
    font-size: 0.75rem !important;
    color: #ff00cc !important;
    margin-bottom: 0.5rem !important;
    display: flex !important;
    align-items: center !important;
    gap: 0.3rem !important;
    justify-content: flex-end !important;
}

.card-author::before {
    content: '✍️';
    font-size: 0.7rem;
}

.card-description {
    background: rgba(0, 0, 0, 0.3) !important;
    padding: 1rem !important;
    border-radius: 0.8rem !important;
    margin: 0.5rem 0 1rem 0 !important;
    font-size: 0.85rem !important;
    color: #a0b0d0 !important;
    line-height: 1.7 !important;
    min-height: 100px !important;
    max-height: 180px !important;
    overflow-y: auto !important;
    word-break: break-word !important;
    border-left: 3px solid #00ffff !important;
}

.card-description::-webkit-scrollbar {
    width: 5px;
}

.card-description::-webkit-scrollbar-track {
    background: #1a1a3a;
    border-radius: 5px;
}

.card-description::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #00ffff, #8b00ff);
    border-radius: 5px;
}

.card-footer {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    margin-top: 0.5rem !important;
    gap: 1rem !important;
    width: 100% !important;
}

.card-time {
    font-size: 0.7rem !important;
    color: #00ccff !important;
    flex-shrink: 0 !important;
    background: rgba(0, 255, 255, 0.1) !important;
    padding: 0.2rem 0.6rem !important;
    border-radius: 1rem !important;
    border: 1px solid #00ffff40;
}

.preview-btn {
    background: linear-gradient(135deg, #00ffff, #8b00ff) !important;
    color: white !important;
    padding: 0.5rem 1.3rem !important;
    border-radius: 2rem !important;
    text-decoration: none !important;
    font-size: 0.85rem !important;
    font-weight: 500 !important;
    transition: all 0.3s ease !important;
    white-space: nowrap !important;
    flex-shrink: 0 !important;
    margin-left: auto !important;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

.preview-btn:hover {
    transform: translateY(-2px) !important;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.6) !important;
}

/* 加载更多按钮 */
.load-more-container {
    text-align: center;
    margin-top: 2rem;
}

.load-more-btn {
    background: rgba(0, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    color: #00ffff;
    padding: 0.7rem 2rem;
    border: 1px solid #00ffff;
    border-radius: 2rem;
    cursor: pointer;
    font-size: 0.9rem;
    transition: 0.3s;
}

.load-more-btn:hover {
    background: rgba(0, 255, 255, 0.2);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
}

/* ========== 上传页面 ========== */
.upload-container {
    max-width: 650px;
    margin: 0 auto;
    background: rgba(10, 10, 42, 0.7);
    backdrop-filter: blur(10px);
    border-radius: 1.5rem;
    padding: 2rem;
    border: 1px solid rgba(0, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.upload-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: #00ffff;
    font-size: 0.9rem;
}

.form-group label .required {
    color: #ff00cc;
    margin-left: 4px;
}

.form-group select,
.form-group input[type="text"],
.form-group input[type="file"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #00ffff40;
    border-radius: 0.8rem;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s;
    background: rgba(0, 0, 0, 0.4);
    color: #ffffff;
}

.form-group select:focus,
.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #00ffff;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.form-group textarea {
    resize: vertical;
    font-size: 0.9rem;
}

.form-group small {
    font-size: 0.75rem;
    color: #6b7c9e;
}

.btn-submit {
    width: 100%;
    background: linear-gradient(135deg, #00ffff, #8b00ff);
    color: white;
    padding: 0.85rem;
    border: none;
    border-radius: 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3);
}

.btn-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
}

.message {
    padding: 0.8rem;
    border-radius: 0.8rem;
    margin-bottom: 1rem;
}

.message.success {
    background: rgba(0, 255, 255, 0.2);
    color: #00ffff;
    border-left: 4px solid #00ffff;
}

.message.error {
    background: rgba(255, 0, 204, 0.2);
    color: #ff00cc;
    border-left: 4px solid #ff00cc;
}

.upload-tip {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid rgba(0, 255, 255, 0.2);
    font-size: 0.9rem;
    color: #a0b0d0;
}

.upload-tip h3 {
    color: #00ffff;
    margin-bottom: 0.5rem;
}

.upload-tip ul {
    margin-top: 0.5rem;
    padding-left: 1.2rem;
}

.empty-state {
    text-align: center;
    padding: 3rem;
    background: rgba(10, 10, 42, 0.6);
    border-radius: 1rem;
    color: #a0b0d0;
    border: 1px solid rgba(0, 255, 255, 0.2);
}

.empty-state a {
    color: #00ffff;
    text-decoration: none;
    font-weight: 600;
}

/* ========== Footer ========== */
footer {
    background: rgba(10, 10, 42, 0.8);
    backdrop-filter: blur(10px);
    text-align: center;
    padding: 1.5rem 1rem;
    margin-top: auto;
    border-top: 1px solid rgba(0, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.footer-content p {
    margin: 0.2rem 0;
    font-size: 0.85rem;
    color: #6b7c9e;
}

/* ========== 上传标签切换按钮 ========== */
.upload-tabs {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 2rem;
    padding-bottom: 0;
    border-bottom: none;
}

.tab-btn {
    background: rgba(10, 10, 42, 0.6);
    border: 2px solid var(--border-glow, rgba(0, 255, 255, 0.3));
    padding: 0.8rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--text-secondary, #6b7c9e);
    transition: all 0.3s ease;
    border-radius: 3rem;
    backdrop-filter: blur(10px);
}

.tab-btn.active {
    background: linear-gradient(135deg, var(--gradient-start, #00ffff), var(--gradient-mid, #8b00ff));
    color: white;
    border-color: transparent;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
}

.tab-btn:hover:not(.active) {
    background: rgba(0, 255, 255, 0.15);
    color: var(--gradient-start, #00ffff);
    border-color: var(--gradient-start, #00ffff);
    transform: translateY(-2px);
}

/* ========== 文章卡片样式（一行一个） ========== */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.article-card-item {
    background: var(--card-bg, rgba(10, 10, 42, 0.7));
    backdrop-filter: blur(10px);
    border-radius: 1rem;
    border: 1px solid var(--border-glow, rgba(0, 255, 255, 0.3));
    transition: all 0.3s ease;
    overflow: hidden;
    padding: 1.2rem 1.5rem;
}

.article-card-item:hover {
    transform: translateX(5px);
    border-color: var(--gradient-start, #00ffff);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.article-card-title {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1rem;
}

.article-icon {
    font-size: 1.3rem;
    flex-shrink: 0;
}

.article-title-text {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary, #ccd6f6);
    word-break: break-word;
    line-height: 1.4;
}

.article-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.article-time {
    font-size: 0.75rem;
    color: var(--text-secondary, #6b7c9e);
    background: rgba(0, 0, 0, 0.2);
    padding: 0.25rem 0.8rem;
    border-radius: 1.5rem;
}

.article-read-btn {
    background: linear-gradient(135deg, var(--gradient-start, #00ffff), var(--gradient-mid, #8b00ff));
    color: white;
    padding: 0.4rem 1.2rem;
    border-radius: 2rem;
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.article-read-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.4);
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .slogan h1 {
        font-size: 2rem;
    }
    
    header {
        flex-direction: column;
        gap: 0.8rem;
        text-align: center;
    }
    
    .logo {
        justify-content: center;
    }
    
    nav {
        justify-content: center;
    }
    
    .nav-item {
        padding: 0.4rem 0.7rem;
    }
    
    .nav-text {
        font-size: 0.8rem;
    }
    
    .nav-icon {
        font-size: 1rem;
    }
    
    .home-buttons {
        gap: 1rem;
    }
    
    .btn {
        padding: 0.7rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .cards-grid {
        grid-template-columns: 1fr;
    }
    
    .control-bar {
        flex-direction: column;
    }
    
    .upload-tabs {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .tab-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .article-card-item {
        padding: 1rem;
    }
    
    .article-title-text {
        font-size: 1rem;
    }
    
    .article-icon {
        font-size: 1.1rem;
    }
    
    .article-card-footer {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .article-read-btn {
        align-self: flex-end;
    }
}

/* ========== 清爽主题完整覆盖 ========== */
body.light-theme {
    background: #f0f4f8;
}

body.light-theme::before,
body.light-theme::after {
    display: none !important;
}

body.light-theme header {
    background: #f0f4f8;
    border-bottom: 1px solid #e2e8f0;
    backdrop-filter: none;
}

body.light-theme .logo-main {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: none;
}

body.light-theme .logo-sub {
    color: #3b82f6;
}

body.light-theme .nav-item {
    color: #1e293b;
}

body.light-theme .nav-item:hover {
    background: rgba(37, 99, 235, 0.1);
    color: #2563eb;
}

body.light-theme .slogan h1 {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

body.light-theme .slogan p {
    color: #1e293b;
}

body.light-theme .slogan-sub {
    color: #3b82f6;
    text-shadow: none;
}

body.light-theme .btn-primary,
body.light-theme .btn-secondary,
body.light-theme .btn-skill {
    background: white;
    border: 1px solid #3b82f640;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

body.light-theme .btn-primary {
    color: #2563eb;
}

body.light-theme .btn-skill {
    color: #d97706;
}

body.light-theme .btn-secondary {
    color: #0891b2;
}

body.light-theme .btn-primary:hover,
body.light-theme .btn-skill:hover,
body.light-theme .btn-secondary:hover {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

body.light-theme .stats-info-bar {
    background: rgba(0, 0, 0, 0.05);
}

body.light-theme .stat-number {
    color: #2563eb;
}

body.light-theme .stat-label {
    color: #64748b;
}

body.light-theme .stat-divider {
    color: #94a3b8;
}

body.light-theme .page-header h2 {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

body.light-theme .control-bar {
    background: white;
    border: 1px solid #e2e8f0;
    backdrop-filter: none;
}

body.light-theme .search-box input {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    color: #1e293b;
}

body.light-theme .search-box input:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

body.light-theme .category-select select {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    color: #1e293b;
}

body.light-theme .stats-badge {
    background: #e0e7ff;
    color: #2563eb;
    border: 1px solid #c7d2fe;
}

body.light-theme .card {
    background: white;
    border: 1px solid #e2e8f0;
    backdrop-filter: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

body.light-theme .card::before {
    background: linear-gradient(90deg, #2563eb, #06b6d4, #3b82f6);
}

body.light-theme .card:hover {
    border-color: #3b82f6;
    box-shadow: 0 12px 30px rgba(37, 99, 235, 0.15);
}

body.light-theme .card-category {
    background: #e0e7ff !important;
    color: #2563eb !important;
    border: 1px solid #c7d2fe !important;
}

body.light-theme .card-title {
    color: #1e293b !important;
}

body.light-theme .card-author {
    color: #0891b2 !important;
}

body.light-theme .card-description {
    background: #f8fafc !important;
    color: #475569 !important;
    border-left-color: #3b82f6 !important;
}

body.light-theme .card-time {
    background: #f1f5f9 !important;
    color: #64748b !important;
    border: 1px solid #e2e8f0;
}

body.light-theme .preview-btn {
    background: linear-gradient(135deg, #2563eb, #06b6d4) !important;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.2);
}

body.light-theme .load-more-btn {
    background: white;
    color: #2563eb;
    border: 1px solid #3b82f6;
}

body.light-theme .load-more-btn:hover {
    background: #3b82f6;
    color: white;
}

body.light-theme .upload-container {
    background: white;
    border: 1px solid #e2e8f0;
    backdrop-filter: none;
}

body.light-theme .form-group label {
    color: #1e293b;
}

body.light-theme .form-group select,
body.light-theme .form-group input,
body.light-theme .form-group textarea {
    background: #f8fafc;
    border: 1px solid #cbd5e1;
    color: #1e293b;
}

body.light-theme .btn-submit {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
}

body.light-theme .upload-tip {
    border-top-color: #e2e8f0;
    color: #64748b;
}

body.light-theme .upload-tip h3 {
    color: #2563eb;
}

body.light-theme .tab-btn {
    background: white;
    border: 2px solid #cbd5e1;
    color: #64748b;
}

body.light-theme .tab-btn.active {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
    color: white;
    border-color: transparent;
}

body.light-theme .tab-btn:hover:not(.active) {
    background: #e0e7ff;
    color: #2563eb;
    border-color: #2563eb;
}

body.light-theme .article-card-item {
    background: white;
    border-color: #e2e8f0;
}

body.light-theme .article-card-item:hover {
    border-color: #3b82f6;
}

body.light-theme .article-title-text {
    color: #1e293b;
}

body.light-theme .article-time {
    background: #f1f5f9;
    color: #64748b;
}

body.light-theme .article-read-btn {
    background: linear-gradient(135deg, #2563eb, #06b6d4);
}

body.light-theme footer {
    background: #f0f4f8;
    border-top: 1px solid #e2e8f0;
    backdrop-filter: none;
}

body.light-theme .footer-content p {
    color: #64748b;
}

/* ========== 背景水印（垂直居中，大字体，左右靠近边缘） ========== */
.bg-watermark {
    position: fixed;
    top: 80%;
    left: 0;
    right: 0;
    z-index: 0;
    pointer-events: none;
    overflow: visible;
    transform: translateY(-50%);
}

.watermark-text {
    font-size: clamp(3rem, 15vw, 15rem);
    font-weight: 800;
    color: #ffffff;
    letter-spacing: 0.02em;
    font-family: 'Inter', 'Segoe UI', sans-serif;
    white-space: nowrap;
    display: block;
    width: 100%;
    text-align: center;
    margin: 0;
    padding: 0.2em 0;
    line-height: 1.2;
    opacity: 0.08;
}

/* 清爽主题下的水印颜色 */
body.light-theme .watermark-text {
    color: #1e293b;
    opacity: 0.06;
}

/* 超大屏幕稍微增大 */
@media (min-width: 1920px) {
    .watermark-text {
        font-size: 18rem;
    }
}

/* 手机端调整 */
@media (max-width: 768px) {
    .watermark-text {
        font-size: 5rem;
        line-height: 1.3;
    }
/* ========== 上传页面链接输入框样式修复（高优先级） ========== */

/* 工具表单和文章表单中的链接输入框 */
#toolForm .link-group input,
#toolForm .file-upload-group input,
#articleForm .link-group input,
#articleForm .file-upload-group input {
    width: 100% !important;
    padding: 0.85rem 1rem !important;
    border: 1px solid var(--border-glow, #00ffff40) !important;
    border-radius: 2rem !important;
    font-size: 1rem !important;
    font-family: inherit !important;
    transition: all 0.3s !important;
    background: var(--input-bg, rgba(0, 0, 0, 0.4)) !important;
    color: var(--text-primary, #ccd6f6) !important;
    box-sizing: border-box !important;
}

#toolForm .link-group input:focus,
#toolForm .file-upload-group input:focus,
#articleForm .link-group input:focus,
#articleForm .file-upload-group input:focus {
    outline: none !important;
    border-color: var(--gradient-start, #00ffff) !important;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.3) !important;
}

/* 清爽主题下的链接输入框 */
body.light-theme #toolForm .link-group input,
body.light-theme #toolForm .file-upload-group input,
body.light-theme #articleForm .link-group input,
body.light-theme #articleForm .file-upload-group input {
    background: #f8fafc !important;
    border: 1px solid #cbd5e1 !important;
    color: #1e293b !important;
}

body.light-theme #toolForm .link-group input:focus,
body.light-theme #toolForm .file-upload-group input:focus,
body.light-theme #articleForm .link-group input:focus,
body.light-theme #articleForm .file-upload-group input:focus {
    border-color: #3b82f6 !important;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1) !important;
}