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/* ==========================================
   首页 UI/UX 优化样式 - 品牌色彩系统
   ========================================== */

/* ========== CSS 变量定义 ========== */
:root {
    --brand-primary: #4361ee;
    --brand-primary-hover: #3a56d4;
    --brand-primary-light: #e8ecfc;
    --brand-secondary: #7209b7;
    --brand-accent: #06d6a0;
    --brand-danger: #ef476f;
    --brand-dark: #2b2d42;
    --brand-gray-100: #f8f9fa;
    --brand-gray-200: #e9ecef;
    --brand-gray-300: #dee2e6;
    --brand-gray-500: #adb5bd;
    --brand-gray-700: #495057;
    --brand-gray-800: #343a40;
    --brand-shadow: 0 2px 12px rgba(0,0,0,0.08);
    --brand-shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --brand-radius: 8px;
    --brand-radius-lg: 12px;
}

/* ========== 工具文本框优化 ========== */
.tool-textarea {
    border: 2px solid var(--brand-gray-300);
    border-radius: var(--brand-radius);
    padding: 16px;
    font-family: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
    font-size: 14px;
    line-height: 1.6;
    resize: vertical;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.tool-textarea:focus {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
    outline: none;
}

/* ========== 按钮操作栏 ========== */
.action-bar {
    background: #fff;
    border-radius: var(--brand-radius);
    padding: 12px 8px;
    box-shadow: var(--brand-shadow);
    margin: 16px 0;
    display: flex;
    flex-wrap: nowrap;
    gap: 4px;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.action-bar .btn {
    border-radius: 6px;
    padding: 8px 14px;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    flex-shrink: 0;
}

/* 主要操作按钮 */
.btn-action-primary {
    background: var(--brand-primary) !important;
    color: #fff !important;
    box-shadow: 0 2px 6px rgba(67, 97, 238, 0.3);
}

.btn-action-primary:hover {
    background: var(--brand-primary-hover) !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.4);
}

/* 次要操作按钮 */
.btn-action-secondary {
    background: var(--brand-gray-100) !important;
    color: var(--brand-gray-700) !important;
    border: 1px solid var(--brand-gray-300) !important;
}

.btn-action-secondary:hover {
    background: var(--brand-gray-200) !important;
    border-color: var(--brand-gray-500) !important;
}

/* 复制按钮 */
.btn-copy {
    background: var(--brand-accent) !important;
    color: #fff !important;
    cursor: pointer;
}

.btn-copy:hover {
    opacity: 0.9;
}

/* 分隔线 */
.action-divider {
    width: 1px;
    height: 24px;
    background: var(--brand-gray-300);
    margin: 0 4px;
}

/* ========== 提示卡片 ========== */
.tip-card {
    background: linear-gradient(135deg, var(--brand-primary-light) 0%, #f0e6ff 100%);
    border: 1px solid rgba(67, 97, 238, 0.2);
    border-radius: var(--brand-radius-lg);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
}

.tip-icon {
    width: 36px;
    height: 36px;
    background: var(--brand-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 16px;
}

.tip-content {
    color: var(--brand-gray-700);
    font-size: 14px;
    line-height: 1.6;
}

/* ========== 核心优势区域 ========== */
.features-section {
    margin-top: 32px;
    margin-bottom: 24px;
}

.features-section .section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--brand-dark);
    margin-bottom: 16px;
    text-align: center;
}

.features-section .section-title span {
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.features-section .section-desc {
    color: var(--brand-gray-700);
    font-size: 15px;
    line-height: 1.8;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

/* ========== 工具分类卡片 ========== */
.tool-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

.tool-card {
    background: #fff;
    border-radius: var(--brand-radius-lg);
    padding: 20px;
    box-shadow: var(--brand-shadow);
    transition: all 0.3s;
    border: 1px solid var(--brand-gray-200);
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--brand-shadow-lg);
    border-color: var(--brand-primary);
}

.tool-card .card-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 12px;
}

.tool-card .card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--brand-dark);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--brand-gray-200);
}

.tool-card .card-tools {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 8px;
}

.tool-card .card-tools li {
    padding: 3px 0;
    margin-bottom: 0;
}

.tool-card .card-tools a {
    color: var(--brand-gray-700);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.2s;
}

.tool-card .card-tools a:hover {
    color: var(--brand-primary);
}

/* 图标背景色 */
.icon-bg-blue { background: #e8ecfc; color: var(--brand-primary); }
.icon-bg-purple { background: #f3e8ff; color: var(--brand-secondary); }
.icon-bg-green { background: #e6faf4; color: #06a77d; }
.icon-bg-orange { background: #fff3e0; color: #e67e22; }
.icon-bg-pink { background: #fce4ec; color: var(--brand-danger); }
.icon-bg-cyan { background: #e0f7fa; color: #00838f; }
.icon-bg-indigo { background: #ede7f6; color: #5e35b1; }

/* ========== 底部导航优化 ========== */
.footer-nav-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 24px;
}

.footer-nav-group h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--brand-dark);
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--brand-primary);
    display: inline-block;
}

.footer-nav-group ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-nav-group ul li {
    padding: 4px 0;
    margin-bottom: 0;
}

.footer-nav-group ul li a {
    color: var(--brand-gray-700);
    font-size: 13px;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-nav-group ul li a:hover {
    color: var(--brand-primary);
}

/* ========== 优化导航栏样式 ========== */
.navbar-default .navbar-brand {
    color: var(--brand-primary) !important;
    font-weight: 700;
}

.navbar-default .navbar-nav > li > a {
    font-weight: 500;
}

.navbar-default .navbar-nav > li.active > a,
.navbar-default .navbar-nav > li.active > a:hover,
.navbar-default .navbar-nav > li.active > a:focus {
    color: var(--brand-primary) !important;
    border-bottom: 2px solid var(--brand-primary);
}

/* ========== 优化链接颜色 ========== */
.sejson a:hover {
    color: var(--brand-primary);
}

.footer-nav .list-inline-bg li a:hover {
    color: var(--brand-primary);
}

.footer-nav h3 span {
    border-left-color: var(--brand-primary);
}

.footer-nav h3 span {
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-nav .list-inline-bg {
    background-color: #fff;
    border: 1px solid var(--brand-gray-200);
    border-radius: var(--brand-radius);
    margin-bottom: 16px;
    transition: all 0.3s;
}

.footer-nav .list-inline-bg:hover {
    border-color: var(--brand-primary);
    box-shadow: var(--brand-shadow);
}

.footer-nav .list-inline-bg ul {
    padding: 12px 10px;
}

.footer-nav .list-inline-bg h3 {
    margin-top: 0;
    padding: 12px 10px 8px;
    border-bottom: 1px solid var(--brand-gray-200);
}

.footer-nav .list-inline-bg h3 span {
    border-left: 4px solid var(--brand-primary);
    line-height: 20px;
    padding-left: 10px;
    font-weight: 600;
    font-size: 16px;
}

.footer-nav .list-inline-bg li span {
    background: var(--brand-gray-300);
}

.footer-nav .list-inline-bg li a:hover {
    color: var(--brand-primary);
}

/* ========== 优化按钮默认样式 ========== */
.btn-info {
    background-color: var(--brand-primary) !important;
    border-color: var(--brand-primary) !important;
}

.btn-info:hover,
.btn-info:focus,
.btn-info:active {
    background-color: var(--brand-primary-hover) !important;
    border-color: var(--brand-primary-hover) !important;
}

/* ========== 返回顶部按钮优化 ========== */
.gotop {
    background: var(--brand-primary);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--brand-shadow-lg);
    transition: all 0.3s;
    text-decoration: none;
    padding: 0;
}

.gotop:hover {
    background: var(--brand-primary-hover);
    transform: translateY(-2px);
}

.gotop .arrow {
    display: none;
}

.gotop::after {
    content: "↑";
    color: #fff;
    font-size: 18px;
    font-weight: bold;
}

/* ========== 响应式设计优化 ========== */
@media screen and (max-width: 768px) {
    .action-bar {
        gap: 4px;
        overflow: hidden;
    }
    
    .action-bar .btn {
        padding: 6px 10px;
        font-size: 12px;
        white-space: nowrap;
        flex-shrink: 0;
    }
    
    .action-divider {
        display: none;
    }
    
    .tool-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-nav-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-section .section-title {
        font-size: 18px;
    }
    
    .features-section .section-desc {
        font-size: 14px;
    }
    
    .tip-card {
        flex-direction: column;
        text-align: center;
    }
    
    .tip-icon {
        margin-bottom: 8px;
    }
}

@media screen and (max-width: 480px) {
    .footer-nav-grid {
        grid-template-columns: 1fr;
    }
    
    .action-bar .btn {
        padding: 5px 8px;
        font-size: 11px;
    }
}

/* ========== 标签页导航优化 ========== */
.hbflag {
    margin-bottom: 15px;
    background: transparent;
    border-bottom: 2px solid var(--brand-gray-200);
    padding: 0;
    display: flex;
    flex-wrap: nowrap;
    gap: 2px;
    overflow: visible;
}

.hbflag > li {
    margin-bottom: 0;
    flex-shrink: 0;
    min-width: 0;
}

.hbflag > li.dropdown {
    margin-left: auto;
    overflow: visible !important;
}

.hbflag > li > a {
    display: inline-block;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 500;
    color: var(--brand-gray-700);
    text-decoration: none;
    border-radius: 6px 6px 0 0;
    border: 1px solid transparent;
    border-bottom: none;
    transition: all 0.2s;
    background: var(--brand-gray-100);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 160px;
}

.hbflag > li > a:hover {
    background: var(--brand-gray-200);
    color: var(--brand-primary);
}

.hbflag > li.active > a,
.hbflag > li.active > a:hover,
.hbflag > li.active > a:focus {
    background: var(--brand-primary);
    color: #fff;
    border-color: var(--brand-primary);
}

.hbflag .dropdown-menu {
    position: absolute;
    z-index: 1000;
    border-radius: 0 0 8px 8px;
    border: 1px solid var(--brand-gray-200);
    border-top: 2px solid var(--brand-primary);
    box-shadow: var(--brand-shadow-lg);
    padding: 8px 0;
}

.hbflag .dropdown-menu > li > a {
    padding: 8px 16px;
    font-size: 14px;
    color: var(--brand-gray-700);
    transition: all 0.2s;
}

.hbflag .dropdown-menu > li > a:hover {
    background: var(--brand-primary-light);
    color: var(--brand-primary);
}

/* ========== 搜索功能样式 ========== */
.search-direct-container {
    padding: 10px 0;
    margin: 0;
}

.search-direct-wrap {
    position: relative;
    display: flex;
    align-items: center;
    width: 180px;
    height: 30px;
    background: rgba(255,255,255,0.15);
    border-radius: 4px;
    border: 1px solid rgba(255,255,255,0.2);
    overflow: hidden;
    transition: all 0.2s;
}

.search-direct-wrap:hover {
    background: rgba(255,255,255,0.25);
}

.search-direct-wrap:focus-within {
    background: rgba(255,255,255,0.3);
    border-color: rgba(255,255,255,0.4);
}

.search-direct-input {
    flex: 1;
    height: 30px;
    padding: 4px 10px;
    border: none;
    outline: none;
    font-size: 13px;
    color: #fff;
    background: transparent;
}

.search-direct-input::placeholder {
    color: rgba(255,255,255,0.5);
}

.search-arrow {
    color: rgba(255,255,255,0.5);
    padding: 0 10px;
    font-size: 12px;
    cursor: pointer;
    user-select: none;
}

/* 搜索结果面板 */
.search-results {
    position: fixed;
    top: 60px;
    width: 180px;
    max-height: 400px;
    background: #fff;
    border-radius: var(--brand-radius);
    box-shadow: var(--brand-shadow-lg);
    border: 1px solid var(--brand-gray-200);
    z-index: 9999;
    overflow-y: auto;
    overflow-x: hidden;
}

.search-result-item {
    display: block;
    padding: 10px 12px;
    text-decoration: none;
    border-bottom: 1px solid var(--brand-gray-200);
    transition: background 0.2s;
}

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

.search-result-item:hover {
    background: var(--brand-primary-light);
}

.result-name {
    font-size: 14px;
    color: var(--brand-dark);
    display: block;
    line-height: 1.4;
}

.result-name em {
    color: var(--brand-primary);
    font-style: normal;
    font-weight: 600;
    background: var(--brand-primary-light);
    padding: 0 2px;
    border-radius: 2px;
}

.search-no-result {
    padding: 24px 16px;
    text-align: center;
    color: var(--brand-gray-500);
    font-size: 14px;
}

@media screen and (max-width: 768px) {
    .search-direct-wrap {
        width: 140px;
    }
    
    .search-results {
        width: calc(100vw - 40px);
        right: 20px;
        max-height: 50vh;
    }
}

@media screen and (max-width: 480px) {
    .search-direct-wrap {
        width: 120px;
    }
}

/* ==========================================
   底部区域优化样式
   ========================================== */

/* ========== 友情链接区域 ========== */
.friendly-links-section {
    background: linear-gradient(135deg, var(--brand-gray-100) 0%, #fff 100%);
    border-radius: var(--brand-radius-lg);
    padding: 24px;
    margin: 32px 0 24px;
    border: 1px solid var(--brand-gray-200);
    box-shadow: var(--brand-shadow);
}

.friendly-links-title {
    margin-bottom: 16px;
    text-align: center;
}

.friendly-links-title span {
    display: inline-block;
    font-size: 16px;
    font-weight: 600;
    color: var(--brand-dark);
    padding: 8px 24px;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}

.friendly-links-title span::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
    border-radius: 2px;
}

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

.friendly-link {
    display: inline-block;
    padding: 10px 24px;
    background: #fff;
    border: 1px solid var(--brand-gray-300);
    border-radius: 24px;
    color: var(--brand-gray-700);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.friendly-link:hover {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    color: #fff;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.3);
    text-decoration: none;
}

/* ========== 底部包装器 ========== */
.footer-wrapper {
    background: linear-gradient(180deg, var(--brand-gray-100) 0%, #fff 100%);
    padding: 16px 0 0;
}

/* ========== 版权信息区域 ========== */
.copyright {
    background: var(--brand-dark);
    padding: 32px 0;
    margin-bottom: 0;
}

.copyright-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.copyright-logo {
    margin-bottom: 8px;
}

.copyright-logo .logo-text {
    font-size: 24px;
    font-weight: 800;
    background: linear-gradient(90deg, #7fc8f8, var(--brand-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.copyright-info {
    display: flex;
    align-items: center;
    gap: 12px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    flex-wrap: wrap;
    justify-content: center;
}

.copyright-info span {
    margin: 0;
}

.copyright-info a {
    color: var(--brand-accent);
    text-decoration: none;
    transition: color 0.2s;
}

.copyright-info a:hover {
    color: #7fc8f8;
    text-decoration: none;
}

.copyright-divider {
    color: rgba(255, 255, 255, 0.3);
}

.copyright-beian a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 13px;
    transition: color 0.2s;
}

.copyright-beian a:hover {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
}

/* ========== 底部区域响应式设计 ========== */
@media screen and (max-width: 768px) {
    .friendly-links-section {
        padding: 20px;
        margin: 24px 0 16px;
    }
    
    .friendly-links-title span {
        font-size: 15px;
    }
    
    .friendly-link {
        padding: 8px 18px;
        font-size: 13px;
    }
    
    .copyright {
        padding: 24px 0;
    }
    
    .copyright-logo .logo-text {
        font-size: 20px;
    }
    
    .copyright-info {
        flex-direction: column;
        gap: 6px;
    }
    
    .copyright-divider {
        display: none;
    }
}

@media screen and (max-width: 480px) {
    .friendly-links-section {
        padding: 16px;
    }
    
    .friendly-links-list {
        gap: 8px;
    }
    
    .friendly-link {
        padding: 6px 14px;
        font-size: 12px;
    }
}