/* ========================================
   霞光 - 个人技术工具站 全局样式
   蓝白简约风格
   ======================================== */

:root {
    --primary: #1a56db;
    --primary-light: #3b82f6;
    --primary-dark: #1e40af;
    --accent: #0ea5e9;
    --bg: #f8fafc;
    --bg-dark: #0f172a;
    --surface: #ffffff;
    --surface-hover: #f1f5f9;
    --border: #e2e8f0;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    --success: #22c55e;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ========================================
   导航栏
   ======================================== */

.navbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.92);
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
    font-size: 20px;
    transition: var(--transition);
}

.brand:hover {
    opacity: 0.8;
}

.brand-logo {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    object-fit: cover;
}

.brand-text {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 8px;
    align-items: center;
}

.nav-link {
    padding: 8px 16px;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

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

.nav-link.active {
    color: var(--primary);
    background: rgba(26, 86, 219, 0.08);
}

/* ========================================
   主内容区
   ======================================== */

.main-content {
    flex: 1;
}

/* ========================================
   Hero 区域
   ======================================== */

.hero {
    background: linear-gradient(180deg, #eff6ff 0%, var(--bg) 100%);
    padding: 80px 24px 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 50% 50%, rgba(26,86,219,0.04) 0%, transparent 50%);
    pointer-events: none;
}

.hero-inner {
    max-width: 720px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(26, 86, 219, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--success);
    border-radius: 50%;
    display: inline-block;
}

.hero-title {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 32px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: white;
    box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(26, 86, 219, 0.4);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    border-color: var(--text-light);
}

/* ========================================
   工具模块卡片区
   ======================================== */

.tools-section {
    padding: 60px 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 16px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    opacity: 0;
    transition: var(--transition);
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(26, 86, 219, 0.15);
}

.tool-card:hover::before {
    opacity: 1;
}

.tool-card.coming-soon {
    opacity: 0.7;
    cursor: default;
}

.tool-card.coming-soon:hover {
    transform: none;
    box-shadow: var(--shadow);
}

.tool-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.tool-icon.blue {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
}

.tool-icon.green {
    background: linear-gradient(135deg, #dcfce7, #bbf7d0);
}

.tool-icon.purple {
    background: linear-gradient(135deg, #f3e8ff, #e9d5ff);
}

.tool-icon.gray {
    background: linear-gradient(135deg, #f1f5f9, #e2e8f0);
}

.tool-name {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.tool-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 100px;
    background: var(--success);
    color: white;
}

.tool-badge.beta {
    background: var(--warning);
}

.tool-badge.soon {
    background: var(--text-light);
}

.tool-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
    flex: 1;
}

.tool-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tool-feature {
    font-size: 12px;
    padding: 4px 10px;
    background: var(--bg);
    border-radius: 100px;
    color: var(--text-secondary);
    font-weight: 500;
}

.tool-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-weight: 600;
    font-size: 14px;
    margin-top: auto;
}

.tool-card:hover .tool-action {
    gap: 10px;
}

.tool-action-arrow {
    transition: var(--transition);
}

/* ========================================
   网站说明区域
   ======================================== */

.info-section {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 48px 24px;
}

.info-inner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
}

.info-text {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
}

.info-text strong {
    color: var(--text);
}

/* ========================================
   页脚
   ======================================== */

.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: 32px 24px;
    text-align: center;
}

.footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-brand {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: #fff;
}

.footer-desc {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.footer-links {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.footer-link {
    color: var(--text-light);
    text-decoration: none;
    font-size: 13px;
    transition: var(--transition);
}

.footer-link:hover {
    color: #fff;
}

.footer-icp {
    font-size: 12px;
    color: var(--text-light);
    opacity: 0.8;
}

.footer-icp a {
    color: inherit;
    text-decoration: none;
}

.footer-icp a:hover {
    color: #fff;
}

/* ========================================
   响应式
   ======================================== */

@media (max-width: 768px) {
    .navbar-inner {
        padding: 0 16px;
        height: 56px;
    }

    .nav-links {
        display: none;
    }

    .hero {
        padding: 48px 16px 40px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .tools-section {
        padding: 40px 16px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .tool-card {
        padding: 24px;
    }

    .section-title {
        font-size: 24px;
    }
}