/* Enterprise Template CSS */
/* 企业级短链接平台模板样式 */

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 变量定义 */
:root {
    --primary-color: #0066cc;
    --primary-hover: #0052a3;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --white-color: #ffffff;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

/* 基础样式 */
body {
    font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-100);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background-color: var(--white-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 36px 0;
    max-width: 1400px;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
}

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

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.logo-text:hover {
    color: var(--primary-hover);
}

/* 导航菜单 */
.nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-item {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: var(--gray-700);
    font-weight: 500;
    font-size: 16px;
    padding: 12px 20px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--gray-100);
}

.nav-link.active {
    color: var(--primary-color);
    background-color: var(--gray-100);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

/* 用户操作区 */
.user-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 按钮样式 */
.btn {
    padding: 14px 32px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    display: inline-block;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    user-select: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: var(--white-color);
    box-shadow: 0 2px 6px rgba(0, 102, 204, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 4px 12px rgba(0, 102, 204, 0.3);
    transform: translateY(-1px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: var(--white-color);
    box-shadow: 0 2px 6px rgba(108, 117, 125, 0.2);
}

.btn-secondary:hover {
    background-color: var(--gray-700);
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
    transform: translateY(-1px);
}

.btn-success {
    background-color: var(--success-color);
    color: var(--white-color);
    box-shadow: 0 2px 6px rgba(40, 167, 69, 0.2);
}

.btn-success:hover {
    background-color: #218838;
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.3);
    transform: translateY(-1px);
}

.btn-warning {
    background-color: var(--warning-color);
    color: var(--gray-900);
    box-shadow: 0 2px 6px rgba(255, 193, 7, 0.2);
}

.btn-warning:hover {
    background-color: #e0a800;
    box-shadow: 0 4px 12px rgba(255, 193, 7, 0.3);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: var(--danger-color);
    color: var(--white-color);
    box-shadow: 0 2px 6px rgba(220, 53, 69, 0.2);
}

.btn-danger:hover {
    background-color: #c82333;
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
    transform: translateY(-1px);
}

.btn-info {
    background-color: var(--info-color);
    color: var(--white-color);
    box-shadow: 0 2px 6px rgba(23, 162, 184, 0.2);
}

.btn-info:hover {
    background-color: #138496;
    box-shadow: 0 4px 12px rgba(23, 162, 184, 0.3);
    transform: translateY(-1px);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white-color);
}

.btn-sm {
    padding: 6px 16px;
    font-size: 12px;
}

.btn-lg {
    padding: 12px 32px;
    font-size: 16px;
}

.btn-block {
    display: block;
    width: 100%;
}

/* 主内容区 */
.main {
    flex: 1;
    padding: 40px 0;
}

/* 英雄区 */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, #004c99 100%);
    color: var(--white-color);
    padding: 100px 0;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="rgba(255,255,255,0.1)" d="M0,192L48,197.3C96,203,192,213,288,229.3C384,245,480,267,576,261.3C672,256,768,224,864,202.7C960,181,1056,171,1152,181.3C1248,192,1344,224,1392,240L1440,256L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"></path></svg>');
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-description {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* 短链接生成表单 */
.link-generator {
    background-color: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 40px;
    margin-bottom: 60px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    transition: var(--transition);
}

.link-generator:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.link-generator h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
    color: var(--gray-800);
    text-align: center;
}

/* 表单样式 */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--gray-700);
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
    background-color: var(--white-color);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: var(--gray-500);
}

.form-row {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
    min-width: 200px;
}

/* 选择框 */
.select-control {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 16px;
    transition: var(--transition);
    background-color: var(--white-color);
    cursor: pointer;
}

.select-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

/* 提示框 */
.alert {
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    border: 1px solid transparent;
    position: relative;
    transition: var(--transition);
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-color: #bee5eb;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-color: #c3e6cb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border-color: #ffeaa7;
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border-color: #f5c6cb;
}

/* 结果展示 */
.result-box {
    background-color: var(--gray-100);
    border-radius: var(--border-radius);
    padding: 24px;
    margin-top: 30px;
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.result-box:hover {
    background-color: var(--gray-200);
    transform: translateY(-1px);
}

.result-url {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.result-url a {
    flex: 1;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    word-break: break-all;
}

.result-url a:hover {
    text-decoration: underline;
}

/* 功能区 */
.features-section {
    padding: 80px 0;
    background-color: var(--white-color);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--gray-800);
}

.section-description {
    font-size: 16px;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--white-color);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    border-top: 4px solid var(--primary-color);
}

.feature-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-5px);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--gray-800);
}

.feature-description {
    color: var(--gray-600);
    line-height: 1.6;
}

/* 统计区 */
.stats-section {
    background-color: var(--gray-800);
    color: var(--white-color);
    padding: 80px 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    text-align: center;
}

.stat-item {
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.stat-label {
    font-size: 16px;
    color: var(--gray-400);
}

/* 页脚 */
.footer {
    background-color: var(--gray-900);
    color: var(--gray-400);
    padding: 60px 0 30px;
    margin-top: auto;
}

.footer-inner {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--white-color);
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white-color);
    padding-left: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--gray-800);
    color: var(--gray-500);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 20px;
        padding: 20px;
    }
    
    .nav-list {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
    
    .user-actions {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-description {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .link-generator {
        padding: 24px;
    }
    
    .form-row {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
    
    .footer-inner {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* AJAX 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-300);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.loading-container {
    text-align: center;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--gray-300);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
    margin: 0 auto 16px;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 10000;
    transition: var(--transition);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--white-color);
    border-radius: var(--border-radius);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    padding: 32px;
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow-y: auto;
    transform: translateY(-20px);
    opacity: 0;
    transition: var(--transition);
}

.modal.show .modal-content {
    transform: translateY(0);
    opacity: 1;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.modal-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-800);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray-500);
    transition: var(--transition);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.modal-close:hover {
    color: var(--gray-700);
    background-color: var(--gray-100);
}

.modal-body {
    margin-bottom: 24px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
    cursor: help;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--gray-800);
    color: var(--white-color);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    margin-bottom: 8px;
}

.tooltip::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--gray-800);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1001;
    margin-bottom: 0;
}

.tooltip:hover::after,
.tooltip:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

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

.slide-in {
    animation: slideIn 0.5s ease-in-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* 无障碍设计 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0000cc;
        --primary-hover: #000099;
        --gray-100: #f0f0f0;
        --gray-200: #e0e0e0;
        --gray-300: #d0d0d0;
        --gray-400: #c0c0c0;
        --gray-500: #b0b0b0;
        --gray-600: #a0a0a0;
        --gray-700: #909090;
        --gray-800: #808080;
        --gray-900: #707070;
    }
}

/* 深色模式 */
@media (prefers-color-scheme: dark) {
    :root {
        --white-color: #1a1a1a;
        --gray-100: #2d2d2d;
        --gray-200: #3d3d3d;
        --gray-300: #4d4d4d;
        --gray-400: #5d5d5d;
        --gray-500: #6d6d6d;
        --gray-600: #7d7d7d;
        --gray-700: #8d8d8d;
        --gray-800: #9d9d9d;
        --gray-900: #adadad;
        --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    }
    
    body {
        background-color: var(--gray-100);
        color: var(--gray-800);
    }
    
    .header {
        background-color: var(--white-color);
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    }
    
    .link-generator {
        background-color: var(--white-color);
        box-shadow: var(--box-shadow);
    }
    
    .form-control,
    .select-control {
        background-color: var(--gray-200);
        border-color: var(--gray-400);
        color: var(--gray-800);
    }
    
    .result-box {
        background-color: var(--gray-200);
    }
    
    .feature-card {
        background-color: var(--white-color);
        box-shadow: var(--box-shadow);
    }
    
    .modal-content {
        background-color: var(--white-color);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }
    
    .modal-header,
    .modal-footer {
        border-color: var(--gray-300);
    }
}