/**
 * 中俊企管官网样式表
 * 深海蓝 #0A1628 + 帝王金 #C9A96E + 暖白 #FAFAF5
 */

/* ========== CSS变量 ========== */
:root {
    --color-primary: #0A1628;
    --color-secondary: #0F2440;
    --color-accent: #C9A96E;
    --color-accent-light: #D4B87A;
    --color-accent-dark: #A8894E;
    --color-bg: #FAFAF5;
    --color-white: #FFFFFF;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-text-muted: #999999;
    --color-border: #E8E4DC;
    --color-success: #2E7D32;
    --color-warning: #ED6C02;
    --color-danger: #D32F2F;
    
    --font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'WenQuanYi Micro Hei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    --border-radius: 8px;
    --border-radius-sm: 4px;
    --border-radius-lg: 12px;
    
    --shadow-sm: 0 2px 4px rgba(10, 22, 40, 0.08);
    --shadow-md: 0 4px 12px rgba(10, 22, 40, 0.12);
    --shadow-lg: 0 8px 24px rgba(10, 22, 40, 0.16);
    --shadow-gold: 0 4px 16px rgba(201, 169, 110, 0.25);
    
    --transition: all 0.3s ease;
    --transition-fast: all 0.2s ease;
    
    --container-width: 1200px;
    --header-height: 70px;
}

/* ========== 基础重置 ========== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html, body {
  overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ========== 通用布局 ========== */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========== 顶部栏 ========== */
.top-bar {
    background: linear-gradient(180deg, var(--color-primary) 0%, #0a1628 100%);
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) 0;
}

.top-bar-content {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.top-bar a {
    color: var(--color-accent);
}

.top-bar a:hover {
    color: var(--color-accent-light);
}

/* ========== 头部/导航 ========== */
.header {
    background: linear-gradient(180deg, var(--color-primary) 0%, #0a1628 100%);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-md);
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    gap: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.logo-img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 2px;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-lg);
    flex: 1;
    justify-content: center;
}

.nav-menu a {
    padding: 16px 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    font-size: 16px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    transition: color 0.2s, padding-left 0.2s;
    display: flex;
    align-items: center;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--color-accent);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
}

.header-cta {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white) !important;
    padding: var(--spacing-sm) var(--spacing-lg) !important;
    border-radius: var(--border-radius);
    font-weight: 600;
    white-space: nowrap;
    box-shadow: var(--shadow-gold);
}

.header-cta:hover {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    transform: translateY(-1px);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.mobile-menu-btn span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
    transition: var(--transition);
}

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 998;
}

/* ========== 主内容区 ========== */
.main-content {
    min-height: calc(100vh - var(--header-height) - 300px);
}

/* ========== 页面标题区 ========== */
.page-header {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    padding: var(--spacing-3xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23C9A96E' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.page-header h1 {
    font-size: var(--font-size-4xl);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    position: relative;
}

.page-header p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    max-width: 600px;
    margin: 0 auto;
    position: relative;
}

.gold-line {
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    margin: var(--spacing-md) auto;
}

/* ========== 面包屑 ========== */
.breadcrumb {
    padding: var(--spacing-md) 0;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.breadcrumb a {
    color: var(--color-text-light);
}

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

.breadcrumb span {
    margin: 0 var(--spacing-sm);
    color: var(--color-text-muted);
}

/* ========== 内容区块 ========== */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-alt {
    background: var(--color-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto;
}

.section-header .gold-line {
    margin: var(--spacing-md) auto var(--spacing-lg);
}

/* ========== 服务卡片 ========== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.service-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: var(--transition);
}

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

.service-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 32px;
}

.service-card h3 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.service-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ========== 数据展示 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl);
}

.stat-num {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-accent);
    display: block;
    line-height: 1.2;
}

.stat-label {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-top: var(--spacing-sm);
}

/* ========== 资质分类 ========== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.category-item {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.category-item:hover,
.category-item.active {
    border-color: var(--color-accent);
    background: linear-gradient(135deg, rgba(201, 169, 110, 0.1), transparent);
}

.category-item a {
    display: block;
    color: var(--color-primary);
    font-weight: 600;
}

.category-item:hover a {
    color: var(--color-accent-dark);
}

.category-icon {
    font-size: 36px;
    margin-bottom: var(--spacing-sm);
}

/* ========== 资质列表 ========== */
.standards-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--spacing-xl);
}

.sidebar {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
    height: fit-content;
}

.sidebar-title {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.sidebar-nav a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
    font-size: var(--font-size-sm);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: rgba(201, 169, 110, 0.15);
    color: var(--color-accent-dark);
    font-weight: 500;
}

.standards-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.standard-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.standard-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-gold);
}

.standard-card h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.standard-card h3 a {
    color: inherit;
}

.standard-card h3 a:hover {
    color: var(--color-accent);
}

.standard-level {
    display: inline-block;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-accent);
    padding: 2px 10px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    margin-left: var(--spacing-sm);
}

.standard-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.standard-card .btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border: 1px solid var(--color-accent);
    color: var(--color-accent-dark);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.standard-card .btn:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

/* ========== 资质详情 ========== */
.standard-detail {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
}

.detail-header {
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.detail-header h1 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.detail-meta {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.detail-meta span {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.detail-content {
    line-height: 1.8;
}

.detail-content h2 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin: var(--spacing-xl) 0 var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 3px solid var(--color-accent);
}

.detail-content h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.detail-content p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.detail-content ul {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
}

.detail-content li {
    list-style: disc;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.detail-content strong {
    color: var(--color-primary);
}

/* ========== 表格 ========== */
.table-responsive {
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.data-table th {
    background: linear-gradient(180deg, var(--color-primary) 0%, #0a1628 100%);
    color: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: left;
    font-weight: 600;
}

.data-table td {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.data-table tr:nth-child(even) {
    background: rgba(250, 250, 245, 0.5);
}

.data-table tr:hover {
    background: rgba(201, 169, 110, 0.08);
}

/* ========== FAQ手风琴 ========== */
.faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.faq-item {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    background: none;
    border: none;
    text-align: left;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.faq-question:hover {
    background: rgba(201, 169, 110, 0.08);
}

.faq-question .icon {
    font-size: var(--font-size-xl);
    color: var(--color-accent);
    transition: var(--transition-fast);
}

.faq-item.active .faq-question .icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer-content {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
    color: var(--color-text-light);
    line-height: 1.8;
}

/* ========== 关于我们 ========== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.about-text h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.about-text p {
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
}

.method-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.method-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
}

.method-card h3 {
    color: var(--color-accent-dark);
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-sm);
}

.method-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ========== 联系页面 ========== */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
}

.contact-info {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
}

.contact-info h2 {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.contact-text h3 {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.contact-text p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.contact-text a {
    color: var(--color-accent-dark);
    font-weight: 600;
}

.contact-qr {
    text-align: center;
    padding: var(--spacing-lg);
}

.contact-qr img {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.contact-qr p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

/* ========== 新闻/案例 ========== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.article-card {
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    transition: var(--transition);
}

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

.article-image {
    height: 200px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--color-accent);
}

.article-content {
    padding: var(--spacing-lg);
}

.article-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.article-card h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.article-card h3 a {
    color: inherit;
}

.article-card h3 a:hover {
    color: var(--color-accent);
}

.article-card p {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    line-height: 1.7;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
    color: var(--color-white);
    box-shadow: var(--shadow-gold);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-accent-light), var(--color-accent));
    transform: translateY(-2px);
    color: var(--color-white);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--color-accent);
    color: var(--color-accent-dark);
}

.btn-secondary:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: var(--font-size-lg);
}

/* ========== CTA区块 ========== */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: var(--spacing-3xl) 0;
    text-align: center;
}

.cta-section h2 {
    font-size: var(--font-size-3xl);
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.cta-section p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

/* ========== 分页 ========== */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xl);
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 var(--spacing-md);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: var(--color-text);
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

.pagination a:hover {
    border-color: var(--color-accent);
    color: var(--color-accent-dark);
}

.pagination .active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-white);
}

/* ========== 页脚 ========== */
.footer {
    background: linear-gradient(180deg, var(--color-primary) 0%, #0a1628 100%);
    color: rgba(255, 255, 255, 0.8);
    padding: var(--spacing-3xl) 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.8fr;
    gap: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-col h3 {
    font-size: var(--font-size-lg);
    color: var(--color-accent);
    margin-bottom: var(--spacing-md);
}

.footer-col p {
    font-size: var(--font-size-sm);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.footer-data {
    display: flex;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-md);
}

.data-item {
    text-align: center;
}

.data-item .data-num {
    display: block;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent);
}

.data-item .data-label {
    font-size: var(--font-size-xs);
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
}

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

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.footer-contact .contact-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
    background: rgba(201, 169, 110, 0.2);
}

.footer-contact a {
    color: rgba(255, 255, 255, 0.8);
}

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

.footer-qr {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-qr img {
    width: 130px;
    height: 130px;
    border-radius: 12px;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 4px 16px rgba(0,0,0,0.2);
    border: 2px solid rgba(212, 175, 55, 0.15);
}

.footer-qr span {
    font-size: 14px;
    color: var(--color-accent);
    font-weight: 600;
    letter-spacing: 2px;
    text-align: center;
}

.footer-bottom {
    padding: var(--spacing-lg) 0;
    text-align: center;
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
}

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

/* ========== 悬浮按钮 ========== */
.floating-buttons {
    position: fixed;
    right: 20px;
    bottom: 100px;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 999;
}

.float-btn {
    width: 50px;
    height: 50px;
    background: linear-gradient(180deg, var(--color-primary) 0%, #0a1628 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transition: var(--transition-fast);
}

.float-btn:hover {
    background: var(--color-accent);
    color: var(--color-white);
    transform: scale(1.1);
}

.float-top {
    opacity: 0;
    pointer-events: none;
}

.float-top.visible {
    opacity: 1;
    pointer-events: auto;
}

/* ========== 后台管理样式 ========== */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 260px;
    background: linear-gradient(180deg, var(--color-primary) 0%, #0a1628 100%);
    color: var(--color-white);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.admin-sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-sidebar-header h1 {
    font-size: var(--font-size-xl);
    color: var(--color-accent);
}

.admin-nav {
    padding: var(--spacing-md) 0;
}

.admin-nav a {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition-fast);
}

.admin-nav a:hover,
.admin-nav a.active {
    background: rgba(201, 169, 110, 0.15);
    color: var(--color-accent);
}

.admin-main {
    flex: 1;
    margin-left: 260px;
    background: var(--color-bg);
    min-height: 100vh;
}

.admin-header {
    background: var(--color-white);
    padding: var(--spacing-md) var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header h2 {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
}

.admin-content {
    padding: var(--spacing-xl);
}

.admin-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.admin-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.admin-card-header h3 {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
}

/* 表单样式 */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
}

.form-control {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(201, 169, 110, 0.15);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

.form-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

/* 表格 */
.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.admin-table th {
    background: var(--color-bg);
    font-weight: 600;
    color: var(--color-primary);
}

.admin-table tr:hover td {
    background: rgba(201, 169, 110, 0.05);
}

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

.admin-table .btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* 状态标签 */
.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    font-size: var(--font-size-xs);
    font-weight: 500;
}

.badge-success {
    background: rgba(46, 125, 50, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(237, 108, 2, 0.1);
    color: var(--color-warning);
}

.badge-danger {
    background: rgba(211, 47, 47, 0.1);
    color: var(--color-danger);
}

/* 登录页面 */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-lg);
}

.login-card h1 {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.login-card .logo {
    display: block;
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.alert {
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.alert-success {
    background: rgba(46, 125, 50, 0.1);
    color: var(--color-success);
    border: 1px solid rgba(46, 125, 50, 0.2);
}

.alert-danger {
    background: rgba(211, 47, 47, 0.1);
    color: var(--color-danger);
    border: 1px solid rgba(211, 47, 47, 0.2);
}

.alert-warning {
    background: rgba(237, 108, 2, 0.1);
    color: var(--color-warning);
    border: 1px solid rgba(237, 108, 2, 0.2);
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .standards-layout {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        position: static;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 60px;
    }
    
    .top-bar-content {
        justify-content: center;
        font-size: var(--font-size-xs);
    }
    
    .top-bar span:not(:last-child)::after {
        content: '|';
        margin-left: var(--spacing-sm);
        opacity: 0.3;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(180deg, rgba(15, 27, 45, 0.98) 0%, rgba(8, 16, 32, 0.99) 100%);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 0;
        gap: 0;
        z-index: 999;
        overflow-y: auto;
        visibility: hidden;
        opacity: 0;
        transition: visibility 0s 0.35s, opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        display: flex;
    }
    .nav-menu::before {
        content: "";
        display: block;
        height: 2px;
        background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
        opacity: 0.6;
    }
    .nav-menu.active {
        visibility: visible;
        opacity: 1;
        transition: visibility 0s 0s, opacity 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .nav-menu li {
        list-style: none;
        width: 100%;
        opacity: 0;
        transform: translateX(-20px);
        transition: opacity 0.3s ease, transform 0.3s ease;
    }
    .nav-menu.active li {
        opacity: 1;
        transform: translateX(0);
    }
    .nav-menu.active li:nth-child(1) { transition-delay: 0.05s; }
    .nav-menu.active li:nth-child(2) { transition-delay: 0.1s; }
    .nav-menu.active li:nth-child(3) { transition-delay: 0.15s; }
    .nav-menu.active li:nth-child(4) { transition-delay: 0.2s; }
    .nav-menu.active li:nth-child(5) { transition-delay: 0.25s; }
    .nav-menu.active li:nth-child(6) { transition-delay: 0.3s; }
    .nav-menu.active li:nth-child(7) { transition-delay: 0.35s; }
    .nav-menu a {
        display: flex;
        align-items: center;
        padding: 18px 24px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        font-size: 17px;
        font-weight: 500;
        color: rgba(255, 255, 255, 0.75);
        transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        letter-spacing: 1px;
        position: relative;
    }
    .nav-menu a::before {
        content: "";
        position: absolute;
        left: 0;
        top: 50%;
        transform: translateY(-50%) scaleY(0);
        width: 3px;
        height: 24px;
        background: linear-gradient(180deg, var(--color-accent), var(--color-accent-dark));
        border-radius: 0 3px 3px 0;
        transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .nav-menu a:hover,
    .nav-menu a.active {
        color: var(--color-accent);
        background: linear-gradient(90deg, rgba(212, 175, 55, 0.08), transparent);
        padding-left: 28px;
    }
    .nav-menu a:hover::before,
    .nav-menu a.active::before {
        transform: translateY(-50%) scaleY(1);
    }
    .nav-menu a.active::after {
        display: none;
    }
    .nav-menu .mobile-cta {
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 28px 24px 20px;
        padding: 16px 24px;
        background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
        color: var(--color-white) !important;
        border-radius: 12px;
        font-size: 17px;
        font-weight: 600;
        letter-spacing: 2px;
        box-shadow: 0 4px 20px rgba(212, 175, 55, 0.3);
        border: none;
        text-decoration: none;
    }
    .mobile-menu-btn {
        display: flex;
        z-index: 1001;
    }
    .mobile-menu-btn span {
        width: 22px;
        height: 2px;
        background: var(--color-accent);
        border-radius: 2px;
        transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .mobile-menu-btn.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
        background: var(--color-accent);
    }
    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }
    .mobile-menu-btn.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
        background: var(--color-accent);
    }
    .mobile-overlay {
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
    }
    .header-cta {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-qr {
        flex-direction: row;
        gap: var(--spacing-lg);
        padding: var(--spacing-md);
        align-items: center;
    }
    .footer-qr img {
        width: 100px;
        height: 100px;
        margin-bottom: 0;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .articles-grid {
        grid-template-template: 1fr;
    }
    
    .page-header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .section-header h2 {
        font-size: var(--font-size-2xl);
    }
    
    .floating-buttons {
        right: 10px;
        bottom: 80px;
    }
    
    .float-btn {
        width: 44px;
        height: 44px;
        font-size: 20px;
    }
    
    /* 后台响应式 */
    .admin-sidebar {
        transform: translateX(-100%);
        transition: var(--transition);
        z-index: 1000;
    }
    
    .admin-sidebar.active {
        transform: translateX(0);
    }
    
    .admin-main {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .stats-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .stat-num {
        font-size: var(--font-size-3xl);
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    .footer-qr {
        flex-direction: column;
        padding: var(--spacing-md);
    }
    .footer-qr img {
        width: 120px;
        height: 120px;
    }
    
    .method-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .footer-data {
        flex-wrap: wrap;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .header,
    .footer,
    .floating-buttons,
    .top-bar {
        display: none !important;
    }
    
    .main-content {
        padding: 0;
    }
    
    .standard-detail {
        box-shadow: none;
        border: none;
    }
}