/* ========================================
   API 中转服务 - 浅色精致风格
   主色: #111114 | 强调色: #93C3F2
   ======================================== */

/* CSS 变量定义 */
:root {
    --color-primary: #111114;
    --color-accent: #93C3F2;
    --color-accent-hover: #7AB0E8;
    --color-bg: #FAFBFC;
    --color-bg-secondary: #F5F7FA;
    --color-surface: #FFFFFF;
    --color-text: #111114;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;
    --shadow-sm: 0 1px 2px rgba(17, 17, 20, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(17, 17, 20, 0.08), 0 2px 4px -1px rgba(17, 17, 20, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(17, 17, 20, 0.08), 0 4px 6px -2px rgba(17, 17, 20, 0.04);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 基础样式 */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 导航栏 - 浅色精致风格 */
.navbar {
    background: var(--color-surface) !important;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    padding: 1rem 0;
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.35rem;
    color: var(--color-primary) !important;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand i {
    color: var(--color-accent);
    font-size: 1.5rem;
}

.navbar-nav .nav-link {
    color: var(--color-text-secondary) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--color-primary) !important;
    background: var(--color-bg-secondary);
}

.navbar-toggler {
    border-color: var(--color-border);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%23111114' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Hero Section - 浅色渐变 */
.hero-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #F0F4F8 0%, #E8F4FD 50%, #F5F7FA 100%);
    color: var(--color-text);
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(ellipse, rgba(147, 195, 242, 0.15) 0%, transparent 70%);
    pointer-events: none;
}

.hero-section h1 {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 3rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero-section .lead {
    color: var(--color-text-secondary);
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

/* API Demo Card */
.api-demo-card {
    position: relative;
    z-index: 2;
}

.api-demo-card .card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    background: var(--color-surface);
    overflow: hidden;
}

.api-demo-card .card-header {
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
}

.api-demo-card .card-header i {
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.api-demo-card .card-body {
    padding: 1.5rem;
}

/* 按钮样式 */
.btn {
    font-weight: 500;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: #2a2a30;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-accent {
    background: var(--color-accent);
    color: var(--color-primary);
}

.btn-accent:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline-primary {
    background: transparent;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
}

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

.btn-outline-secondary {
    background: transparent;
    border: 1.5px solid var(--color-border);
    color: var(--color-text-secondary);
}

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

.btn-success {
    background: #10B981;
    color: white;
}

.btn-success:hover {
    background: #059669;
}

.btn-warning {
    background: #F59E0B;
    color: white;
}

.btn-warning:hover {
    background: #D97706;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1rem;
}

/* 功能特性 */
.features-section {
    padding: 100px 0;
    background: var(--color-bg-secondary);
}

.section-title {
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-primary);
    font-size: 2.25rem;
}

.section-subtitle {
    color: var(--color-text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.feature-card {
    padding: 2.5rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    height: 100%;
    border: 1px solid var(--color-border-light);
}

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

.feature-icon {
    width: 72px;
    height: 72px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--color-accent) 0%, #B8D9F7 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-primary);
    font-size: 1.75rem;
    box-shadow: 0 4px 12px rgba(147, 195, 242, 0.3);
}

.feature-card h4 {
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-weight: 600;
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--color-text-secondary);
    margin-bottom: 0;
    line-height: 1.7;
}

/* 使用说明 */
.usage-section {
    padding: 100px 0;
    background: var(--color-surface);
}

.usage-content h4 {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 1rem;
}

.code-block {
    background: var(--color-bg-secondary);
    border-left: 3px solid var(--color-accent);
    padding: 1.25rem;
    margin: 1rem 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    overflow-x: auto;
    font-size: 0.9rem;
}

.code-block code {
    color: var(--color-primary);
    font-weight: 500;
}

/* 代码示例 */
.examples-section {
    padding: 100px 0;
    background: var(--color-bg-secondary);
}

.example-card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    height: 100%;
    border: 1px solid var(--color-border-light);
    transition: var(--transition);
}

.example-card:hover {
    box-shadow: var(--shadow-lg);
}

.example-card h5 {
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.example-card h5 i {
    color: var(--color-accent);
}

.example-card .code-block {
    background: #1F2937;
    color: #E5E7EB;
    border-left: 3px solid var(--color-accent);
    font-size: 0.85rem;
    border-radius: var(--radius-sm);
}

.example-card .code-block pre {
    margin: 0;
    white-space: pre-wrap;
}

.example-card .code-block code {
    color: #E5E7EB;
}

/* 表单样式 */
.form-label {
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.form-control,
.form-select {
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.875rem 1rem;
    font-size: 0.95rem;
    transition: var(--transition);
    background: var(--color-surface);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(147, 195, 242, 0.2);
    background: var(--color-surface);
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

.form-text {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.input-group-text {
    background: var(--color-bg-secondary);
    border: 1.5px solid var(--color-border);
    border-right: none;
    color: var(--color-text-secondary);
}

.input-group .form-control {
    border-left: none;
}

.input-group .form-control:focus {
    border-left: none;
    box-shadow: none;
}

.input-group:focus-within .input-group-text {
    border-color: var(--color-accent);
}

.input-group:focus-within .form-control {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(147, 195, 242, 0.2);
}

/* 表单页面样式 */
.form-container {
    max-width: 600px;
    margin: 3rem auto;
    padding: 2.5rem;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border-light);
}

.form-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.form-header h2 {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1.75rem;
    margin-bottom: 0.75rem;
}

.form-header h2 i {
    color: var(--color-accent);
    margin-right: 0.5rem;
}

.form-header p {
    color: var(--color-text-secondary);
    margin: 0;
    font-size: 1rem;
}

/* Alert 样式 */
.alert {
    border: none;
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
}

.alert-info {
    background: rgba(147, 195, 242, 0.15);
    color: #1E40AF;
}

.alert-info i {
    color: var(--color-accent);
}

.alert-success {
    background: rgba(16, 185, 129, 0.15);
    color: #065F46;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    color: #92400E;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.15);
    color: #991B1B;
}

/* 页脚 */
.footer {
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.8);
    padding: 2.5rem 0;
    margin-top: auto;
}

.footer a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

.footer a:hover {
    color: var(--color-accent);
}

/* 测试结果样式 */
.test-result {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-all;
}

.test-result.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    color: #065F46;
}

.test-result.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: #991B1B;
}

.test-result.loading {
    background: rgba(147, 195, 242, 0.15);
    border: 1px solid rgba(147, 195, 242, 0.3);
    color: #1E40AF;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-section {
        padding: 60px 0;
        min-height: auto;
    }

    .hero-section h1 {
        font-size: 2rem;
    }

    .features-section,
    .usage-section,
    .examples-section {
        padding: 60px 0;
    }

    .feature-card,
    .example-card {
        margin-bottom: 1.5rem;
    }

    .d-flex.gap-3 {
        flex-direction: column;
        gap: 1rem !important;
    }

    .form-container {
        margin: 1.5rem;
        padding: 1.5rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}

/* 加载动画 */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
    border-radius: 4px;
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

.code-block::-webkit-scrollbar {
    height: 6px;
}

.code-block::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* 表单验证样式 */
.is-invalid {
    border-color: #EF4444 !important;
}

.is-invalid:focus {
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2) !important;
}

.invalid-feedback {
    display: block;
    color: #DC2626;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* 文本颜色辅助类 */
.text-primary {
    color: var(--color-primary) !important;
}

.text-accent {
    color: var(--color-accent) !important;
}

.text-secondary {
    color: var(--color-text-secondary) !important;
}

.text-muted {
    color: var(--color-text-muted) !important;
}

/* 链接样式 */
a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-accent-hover);
}

/* 卡片通用样式 */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

/* 徽章样式 */
.badge {
    font-weight: 500;
    padding: 0.5em 0.75em;
    border-radius: 6px;
}

.badge.bg-primary {
    background: var(--color-primary) !important;
}

.badge.bg-accent {
    background: var(--color-accent) !important;
    color: var(--color-primary);
}