/* 业余无线电主题 - 增强样式文件 */

/* ========================================
   1. CSS 变量定义
   ======================================== */
:root {
    /* 主色调 - 深海蓝 */
    --primary: #1a5f7a;
    --primary-light: #2d8fb4;
    --primary-dark: #134b5f;
    --primary-rgb: 26, 95, 122;
    
    /* 辅助色 - 温暖琥珀 */
    --secondary: #e8a838;
    --secondary-light: #f5c86b;
    --secondary-dark: #c78c22;
    --secondary-rgb: 232, 168, 56;
    
    /* 功能色 */
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #3498db;
    
    /* 中性色 */
    --dark: #1a1a2e;
    --gray-900: #2d3748;
    --gray-700: #4a5568;
    --gray-500: #718096;
    --gray-400: #a0aecb;
    --gray-300: #cbd5e0;
    --gray-200: #e2e8f0;
    --gray-100: #f7fafc;
    --white: #ffffff;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* 过渡 */
    --transition-fast: 150ms;
    --transition: 300ms;
    --transition-slow: 500ms;
}

/* ========================================
   2. 全局基础样式
   ======================================== */
html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--gray-700);
    background-color: var(--bg-secondary);
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   3. 排版
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--gray-900);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition-fast) ease;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ========================================
   4. 卡片组件
   ======================================== */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition) cubic-bezier(0.25, 0.8, 0.25, 1);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.card-img {
    width: 100%;
    height: auto;
    object-fit: cover;
    transition: transform var(--transition-slow) ease;
}

.card:hover .card-img {
    transform: scale(1.05);
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--gray-900);
}

.card-text {
    color: var(--gray-500);
    line-height: 1.6;
}

/* ========================================
   5. 按钮组件
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition) cubic-bezier(0.25, 0.8, 0.25, 1);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(var(--primary-rgb), 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(var(--primary-rgb), 0.4);
    text-decoration: none;
}

.btn-secondary {
    background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
    color: var(--white);
    box-shadow: 0 4px 15px rgba(var(--secondary-rgb), 0.3);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(var(--secondary-rgb), 0.4);
    text-decoration: none;
}

/* ========================================
   6. 导航栏
   ======================================== */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    transition: all var(--transition) ease;
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 1);
    box-shadow: var(--shadow-lg);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary) !important;
}

.nav-link {
    color: var(--gray-700) !important;
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--radius);
    transition: all var(--transition-fast) ease;
}

.nav-link:hover {
    color: var(--primary) !important;
    background: rgba(var(--primary-rgb), 0.1);
}

/* ========================================
   7. 动画效果
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-fadeIn {
    animation: fadeIn 0.4s ease forwards;
}

.animate-slideInLeft {
    animation: slideInLeft 0.6s ease forwards;
}

.animate-slideInRight {
    animation: slideInRight 0.6s ease forwards;
}

/* ========================================
   8. 响应式设计
   ======================================== */
@media (max-width: 1200px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
}

@media (max-width: 992px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .card {
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 768px) {
    body {
        font-size: 0.95rem;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .card-body {
        padding: 1rem;
    }
    
    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.95rem;
    }
}

@media (max-width: 576px) {
    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.1rem; }
    
    .card {
        border-radius: var(--radius-md);
    }
}

/* ========================================
   9. 实用工具类
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary); }
.text-secondary { color: var(--secondary); }
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-danger { color: var(--danger); }
.text-muted { color: var(--gray-500); }

.bg-primary { background-color: var(--primary); }
.bg-secondary { background-color: var(--secondary); }
.bg-light { background-color: var(--gray-100); }
.bg-white { background-color: var(--white); }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-full { border-radius: var(--radius-full); }

.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

/* ========================================
   10. 滚动条样式
   ======================================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 5px;
}

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

/* ========================================
   11. 选中样式
   ======================================== */
::selection {
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary-dark);
}

::-moz-selection {
    background: rgba(var(--primary-rgb), 0.2);
    color: var(--primary-dark);
}