/* Custom Properties & Tokens */
:root {
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-primary: #0369a1; /* Trustworthy professional blue */
    --color-primary-hover: #075985;
    --color-accent: #0284c7;
    --color-warning-bg: #fffbeb;
    --color-warning-text: #b45309;
    --color-warning-border: #fcd34d;
    
    --font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 24px;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 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-normal: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: var(--transition-normal);
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

.section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

h1, h2, h3 {
    line-height: 1.25;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

/* Header */
.header {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid #e2e8f0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: -0.01em;
}

.main-nav {
    display: flex;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--color-text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.main-nav a:hover {
    color: var(--color-primary);
}

.nav-cta {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--color-primary);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition-normal);
}

.nav-cta:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-normal);
    font-size: 1.05rem;
}

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

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

.btn-secondary {
    background-color: white;
    color: var(--color-text-primary);
    border: 1px solid #cbd5e1;
}

.btn-secondary:hover {
    background-color: #f1f5f9;
    color: var(--color-text-primary);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    background-color: var(--color-surface);
    padding: calc(var(--spacing-xl) * 1.1) 0;
    position: relative;
    overflow: hidden;
}

/* Subtle background accent */
.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 60%;
    height: 140%;
    background: radial-gradient(circle, rgba(3,105,161,0.04) 0%, rgba(255,255,255,0) 70%);
    z-index: 0;
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero h1 {
    font-size: 3.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: #0f172a;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    max-width: 90%;
}

.alert-box {
    background-color: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
    color: var(--color-warning-text);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
    display: inline-block;
}

.hero-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Visual Mockup inside Hero */
.visual-placeholder {
    background-color: #f1f5f9;
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    transform: perspective(1000px) rotateY(-8deg) rotateX(4deg);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.visual-placeholder:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.visual-card {
    background: white;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.visual-card-title {
    display: block;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
    font-size: 1.1rem;
}

.visual-item {
    margin-bottom: var(--spacing-sm);
}

.visual-label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.visual-bar-wrapper {
    background-color: #f1f5f9;
    height: 12px;
    border-radius: 6px;
    overflow: hidden;
}

.visual-bar {
    height: 100%;
    border-radius: 6px;
}

/* Services */
.services {
    background-color: var(--color-bg);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--color-surface);
    padding: var(--spacing-lg) var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid #e2e8f0;
    text-align: left;
}

.service-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
    border-color: #cbd5e1;
}

.service-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    display: inline-block;
    padding: 0.75rem;
    background: #f0f9ff;
    border-radius: var(--radius-sm);
}

.service-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.service-card p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* Why Us */
.why-us {
    background-color: var(--color-surface);
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
}

.why-us-content {
    max-width: 760px;
    margin: 0 auto;
}

.why-us-content h2 {
    text-align: center;
}

.feature-list {
    list-style: none;
    margin-top: var(--spacing-md);
}

.feature-list li {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: #f8fafc;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--color-primary);
    font-size: 1.05rem;
}

.feature-list strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* Contact */
.contact {
    background-color: var(--color-bg);
}

.contact-card {
    background: linear-gradient(135deg, var(--color-primary), #0284c7);
    color: white;
    padding: var(--spacing-xl) var(--spacing-md);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.contact-card h2 {
    color: white;
}

.contact-card p {
    color: #e0f2fe;
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.contact-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(4px);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    min-width: 260px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.contact-label {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #bae6fd;
    margin-bottom: var(--spacing-xs);
}

.contact-value {
    font-size: 1.25rem;
    font-weight: 500;
    color: white;
}

.contact-value.highlight {
    font-size: 2.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.contact-value.highlight:hover {
    color: #e0f2fe;
}

/* Footer */
.footer {
    background-color: #0f172a;
    color: #94a3b8;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    font-size: 0.9rem;
}

.footer-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #1e293b;
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.footer-brand {
    font-size: 1.1rem;
    font-weight: 500;
    color: #f8fafc;
}

.footer-contact-simple {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.separator {
    color: #334155;
}

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    margin-bottom: 0.5rem;
}

.footer a {
    color: #cbd5e1;
    text-decoration: none;
}

.footer a:hover {
    color: white;
}

.disclaimer {
    margin-top: var(--spacing-md);
    font-size: 0.8rem;
    color: #64748b;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Responsive */
@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        margin: 0 auto var(--spacing-md);
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .visual-placeholder {
        max-width: 500px;
        margin: 0 auto;
        transform: none !important;
    }
    
    .footer-top {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 600px) {
    .main-nav {
        display: none;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .contact-info {
        flex-direction: column;
    }
    
    .footer-contact-simple {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .separator {
        display: none;
    }
}

/* ====== 列表页与详情页新增样式 ====== */

/* 页面横幅 */
.page-banner {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-xl) 0;
    text-align: center;
}
.page-banner h1 {
    color: white;
    margin-bottom: var(--spacing-sm);
    font-size: 2.5rem;
}
.page-banner p {
    color: #e0f2fe;
    font-size: 1.1rem;
}

/* 过滤与搜索栏 */
.filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    background: white;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid #e2e8f0;
}

.category-tabs {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.category-tabs .tab {
    padding: 0.4rem 1rem;
    border-radius: 20px;
    background: #f1f5f9;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

.category-tabs .tab.active, .category-tabs .tab:hover {
    background: var(--color-primary);
    color: white;
}

.search-box {
    display: flex;
}

.search-box input {
    padding: 0.5rem 1rem;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    outline: none;
    font-size: 0.95rem;
    font-family: inherit;
    width: 200px;
}
.search-box input:focus {
    border-color: var(--color-primary);
}

.search-box button {
    background: var(--color-primary);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    cursor: pointer;
    font-weight: 500;
}
.search-box button:hover {
    background: var(--color-primary-hover);
}

/* 图文列表卡片 */
.list-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--spacing-md);
}

.list-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
}

.list-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.list-img {
    width: 100%;
    height: 200px;
    background-size: cover;
    background-position: center;
}

.list-content {
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.tag {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: #e0f2fe;
    color: var(--color-primary);
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    align-self: flex-start;
}

.list-title {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
}
.list-title a {
    color: var(--color-text-primary);
}
.list-title a:hover {
    color: var(--color-primary);
}

.list-desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
    flex-grow: 1;
}

.list-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid #f1f5f9;
}

.date {
    font-size: 0.8rem;
    color: #94a3b8;
}

.read-more {
    font-size: 0.9rem;
    font-weight: 500;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-top: var(--spacing-xl);
}

.pagination a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    background: white;
    border: 1px solid #cbd5e1;
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-weight: 500;
}
.pagination a:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.pagination a.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.no-data {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-secondary);
    grid-column: 1 / -1;
    background: white;
    border-radius: var(--radius-md);
}

/* 详情页 */
.breadcrumb {
    margin-bottom: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}
.breadcrumb a {
    color: var(--color-text-secondary);
}
.breadcrumb a:hover {
    color: var(--color-primary);
}

.detail-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.detail-header {
    margin-bottom: var(--spacing-lg);
    text-align: center;
}
.detail-header h1 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-sm);
}
.detail-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
}

.detail-hero-img {
    width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}
.detail-hero-img img {
    width: 100%;
    height: auto;
    display: block;
}

.detail-content {
    font-size: 1.05rem;
    line-height: 1.8;
    color: #334155;
    margin-bottom: var(--spacing-xl);
}
.detail-content h3 {
    margin: var(--spacing-md) 0 var(--spacing-sm);
    color: var(--color-text-primary);
}
.detail-content p {
    margin-bottom: var(--spacing-sm);
}
.detail-content ul {
    margin-left: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.detail-action {
    background: #f8fafc;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    text-align: center;
    border: 1px solid #e2e8f0;
}
.detail-action h3 {
    margin-bottom: var(--spacing-xs);
}
.detail-action p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

@media (max-width: 768px) {
    .filter-bar {
        flex-direction: column;
        align-items: flex-start;
    }
    .search-box {
        width: 100%;
    }
    .search-box input {
        flex-grow: 1;
    }
    .detail-container {
        padding: var(--spacing-md);
    }
    .page-banner h1 {
        font-size: 2rem;
    }
}