/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色调 - 现代科技蓝 */
    --primary-color: #0ea5e9;
    --primary-dark: #0284c7;
    --primary-light: #38bdf8;
    
    /* 辅助色 - 深邃紫蓝 */
    --secondary-color: #6366f1;
    --secondary-dark: #4f46e5;
    --secondary-light: #818cf8;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #6366f1 100%);
    --gradient-secondary: linear-gradient(135deg, #6366f1 0%, #0ea5e9 100%);
    --gradient-hero: linear-gradient(135deg, #0ea5e9 0%, #6366f1 50%, #0ea5e9 100%);
    
    /* 中性色 */
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-light: #64748b;
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --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);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 边框 */
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-color: var(--gray-200);
    
    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    /* 字体 */
    --font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* 动画 */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--white);
    overflow-x: hidden;
}

/* ==================== 容器和布局 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 96px 0;
    position: relative;
}

.section-gray {
    background: var(--gray-50);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.7;
}

.section-divider {
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    margin: 24px auto;
    border-radius: 2px;
}

/* ==================== 导航栏 ==================== */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--gray-200);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-img {
    width: 48px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.logo-img img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.logo-text h1 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2px;
}

.logo-text p {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
}

nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 40px;
    justify-content: center;
    align-items: center;
}

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

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(14, 165, 233, 0.1);
    transform: translateY(-1px);
}

.nav-link.active {
    color: var(--primary-color);
    transform: translateY(-1px);
}

.nav-link:active {
    transform: translateY(0);
}

.contact-info {
    display: flex;
    align-items: center;
}

.phone {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: var(--font-size-base);
    background: rgba(14, 165, 233, 0.1);
    padding: 12px 20px;
    border-radius: 8px;
    border: 1px solid rgba(14, 165, 233, 0.2);
}

.phone i {
    font-size: var(--font-size-sm);
}

/* ==================== 主横幅 ==================== */
.hero {
    background: var(--gradient-hero);
    background-size: 200% 200%;
    padding: 160px 0 120px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    text-align: center;
    color: var(--white);
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.1;
    letter-spacing: -0.03em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: 32px;
    opacity: 0.95;
}

.hero-description {
    font-size: var(--font-size-lg);
    margin-bottom: 48px;
    opacity: 0.9;
    line-height: 1.7;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ==================== 按钮样式 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 16px 32px;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
    min-width: 140px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: var(--white);
    border: 2px solid var(--white);
    backdrop-filter: blur(10px);
}

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

/* ==================== 公司概述 ==================== */
.about-content {
    display: block;
    text-align: center;
}

.about-text {
    max-width: 800px;
    margin: 0 auto;
}

.about-text p {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.8;
    text-align: justify;
}

.about-image {
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    position: relative;
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-normal);
}

.about-image:hover img {
    transform: scale(1.02);
}

/* ==================== 核心优势 ==================== */
/* 核心优势部分 */
.advantages {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin: 0;
    padding: 0;
}

.advantage-card {
    background: var(--white);
    padding: 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.advantage-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.advantage-header {
    display: flex;
    align-items: center;
    margin-bottom: 25px;
}

.advantage-icon {
    margin-right: 20px;
    margin-bottom: 0;
}

.advantage-icon .icon-wrapper {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0;
}

.advantage-icon i {
    font-size: 20px;
    color: var(--white);
}

.advantage-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
    text-align: left;
    flex: 1;
}

.advantage-description {
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--text-color);
    margin: 0;
    flex: 1;
}

/* ==================== 业务范围 ==================== */
.services {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 48px;
}

.service-card {
    background: var(--white);
    padding: 48px 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-secondary);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
}

.service-number {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    background: var(--gradient-secondary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 700;
    font-size: var(--font-size-lg);
    box-shadow: var(--shadow-md);
}

.service-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.service-description {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.service-features {
    list-style: none;
}

.service-features li {
    padding: 12px 0;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    position: relative;
    padding-left: 24px;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* 愿景与使命部分 */
.mission-vision {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-top: 60px;
}

.mission-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.95), rgba(255, 255, 255, 0.9));
    padding: 48px 40px;
    border-radius: 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.mission-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.mission-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.mission-header {
    display: flex;
    align-items: center;
    justify-content: center; /* 整体居中 */
    margin-bottom: 24px;
}

.mission-icon {
    margin-right: 0;
    margin-bottom: 0;
}

.mission-icon i {
    width: 36px; /* 进一步减小图标尺寸 */
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px; /* 相应减小字体 */
    box-shadow: 0 3px 12px rgba(26, 115, 232, 0.25);
    transition: all 0.3s ease;
    margin-right: 6px; /* 图标右边距，让文字紧贴 */
}

.mission-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 0;
    margin-left: 0; /* 移除左边距 */
    flex: 1;
    text-align: center; /* 标题文字居中 */
    transition: all 0.3s ease;
}

.mission-subtitle {
    font-size: 18px;
    font-weight: 600;
    color: var(--secondary-color);
    margin-bottom: 20px;
    display: block;
    transition: all 0.3s ease;
}

.mission-description {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 0;
    transition: all 0.3s ease;
}

/* ==================== 联系我们 ==================== */
.contact-content {
    display: flex;
    gap: 40px;
    width: 100%;
}

.contact-info {
    display: flex;
    flex-direction: row;
    gap: 40px;
    width: 100%;
    justify-content: space-between;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 32px;
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    flex: 1;
    max-width: 48%;
}

.contact-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.5rem;
    color: var(--white);
}

.contact-details h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.contact-details p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.6;
}

.contact-form {
    background: var(--white);
    padding: 48px;
    border-radius: var(--border-radius-xl);
    box-shadow: var(--shadow-xl);
}

.contact-form h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 40px;
    text-align: center;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--gray-200);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--white);
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* ==================== 页脚 ==================== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 80px 0 40px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 24px;
}

.footer-logo h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: 8px;
}

.footer-logo p {
    font-size: var(--font-size-sm);
    color: var(--gray-400);
    margin-bottom: 16px;
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 24px;
    position: relative;
}

.footer-section h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 40px;
    height: 2px;
    background: var(--primary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: 32px;
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: color var(--transition-fast);
}

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

.footer-bottom p {
    color: var(--gray-500);
    font-size: var(--font-size-sm);
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gray-400);
    border-radius: 4px;
}

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

/* ==================== 选择文本样式 ==================== */
::selection {
    background: var(--primary-color);
    color: var(--white);
}

::-moz-selection {
    background: var(--primary-color);
    color: var(--white);
}

/* 证书查询页面样式 */
.cert-search-page {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

.cert-page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 60px 0 40px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cert-page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="50" cy="10" r="0.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.cert-page-header .container {
    position: relative;
    z-index: 1;
}

.cert-page-title {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.cert-page-subtitle {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.cert-search-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: -30px auto 40px;
    max-width: 1000px;
    position: relative;
    z-index: 2;
}

.cert-stat-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    border: 1px solid rgba(102, 126, 234, 0.1);
}

.cert-stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.15);
}

.cert-stat-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.cert-stat-icon i {
    font-size: 24px;
    color: white;
}

.cert-stat-number {
    font-size: 32px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 5px;
}

.cert-stat-label {
    color: #7f8c8d;
    font-size: 14px;
}

.cert-search-features {
    background: white;
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 40px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
}

.cert-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.cert-feature-item {
    text-align: center;
    padding: 20px;
    border-radius: 12px;
    transition: all 0.3s ease;
}

.cert-feature-item:hover {
    background: #f8f9fa;
    transform: translateY(-3px);
}

.cert-feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, #e8f4fd 0%, #d1e7dd 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: all 0.3s ease;
}

.cert-feature-item:hover .cert-feature-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.cert-feature-icon i {
    font-size: 28px;
    color: #667eea;
    transition: all 0.3s ease;
}

.cert-feature-item:hover .cert-feature-icon i {
    color: white;
}

.cert-feature-title {
    font-size: 18px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 10px;
}

.cert-feature-desc {
    color: #7f8c8d;
    font-size: 14px;
    line-height: 1.6;
}

.cert-search-main {
    background: white;
    border-radius: 16px;
    padding: 50px;
    margin-bottom: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    position: relative;
}

.cert-search-main::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(135deg, #667eea, #764ba2, #667eea);
    border-radius: 16px;
    z-index: -1;
    opacity: 0.1;
}

.cert-search-title {
    text-align: center;
    margin-bottom: 40px;
}

.cert-search-title h2 {
    font-size: 32px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
}

.cert-search-title p {
    color: #7f8c8d;
    font-size: 16px;
}

.cert-form-container {
    max-width: 600px;
    margin: 0 auto;
}

.cert-form-group {
    margin-bottom: 25px;
}

.cert-form-label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: #2c3e50;
    font-size: 16px;
}

.cert-form-input {
    width: 100%;
    padding: 18px 20px;
    border: 2px solid #e1e8ed;
    border-radius: 10px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: #f8f9fa;
}

.cert-form-input:focus {
    outline: none;
    border-color: #667eea;
    background: white;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.cert-search-btn {
    width: 100%;
    padding: 18px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-top: 30px;
    position: relative;
    overflow: hidden;
}

.cert-search-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.cert-search-btn:hover::before {
    left: 100%;
}

.cert-search-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
}

.cert-search-btn:active {
    transform: translateY(0);
}

.cert-quick-actions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-top: 30px;
}

.cert-quick-btn {
    padding: 15px 20px;
    background: #f8f9fa;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    color: #2c3e50;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.cert-quick-btn:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
    transform: translateY(-2px);
}

.cert-help-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    padding: 30px;
    margin-top: 40px;
}

.cert-help-title {
    font-size: 20px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 20px;
    text-align: center;
}

.cert-help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.cert-help-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid #667eea;
}

.cert-help-item h4 {
    color: #2c3e50;
    margin-bottom: 10px;
    font-size: 16px;
}

.cert-help-item p {
    color: #7f8c8d;
    font-size: 14px;
    line-height: 1.6;
    margin: 0;
}

.cert-result-container {
    background: white;
    border-radius: 16px;
    margin-top: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.1);
    overflow: hidden;
    display: none;
}

.cert-result-header {
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    color: white;
    padding: 25px 30px;
    text-align: center;
}

.cert-result-header.invalid {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
}

.cert-result-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 5px;
}

.cert-result-subtitle {
    opacity: 0.9;
    font-size: 14px;
}

.cert-result-content {
    padding: 40px 30px;
}

.cert-certificate-card {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 30px;
    border: 2px solid #e9ecef;
    position: relative;
}

.cert-certificate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 12px 12px 0 0;
}

.cert-certificate-header {
    text-align: center;
    margin-bottom: 30px;
}

.cert-certificate-title {
    font-size: 28px;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
}

.cert-certificate-subtitle {
    color: #7f8c8d;
    font-size: 16px;
}

.cert-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 25px;
}

.cert-info-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    border: 1px solid #e1e8ed;
}

.cert-info-label {
    font-size: 12px;
    color: #7f8c8d;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    font-weight: 600;
}

.cert-info-value {
    font-size: 16px;
    color: #2c3e50;
    font-weight: 500;
}

.cert-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    justify-content: center;
}

.cert-action-btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.cert-action-btn.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.cert-action-btn.secondary {
    background: #f8f9fa;
    color: #2c3e50;
    border: 2px solid #e1e8ed;
}

.cert-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

.cert-no-result {
    text-align: center;
    padding: 60px 30px;
}

.cert-no-result-icon {
    width: 100px;
    height: 100px;
    background: #f8d7da;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
}

.cert-no-result-icon i {
    font-size: 48px;
    color: #dc3545;
}

.cert-no-result-title {
    font-size: 24px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 10px;
}

.cert-no-result-desc {
    color: #7f8c8d;
    font-size: 16px;
    line-height: 1.6;
    max-width: 500px;
    margin: 0 auto 30px;
}

.cert-loading {
    text-align: center;
    padding: 60px 30px;
}

.cert-loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

.cert-loading-text {
    color: #7f8c8d;
    font-size: 16px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

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

/* 响应式设计 */
@media (max-width: 768px) {
    .cert-page-title {
        font-size: 32px;
    }
    
    .cert-search-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
        margin: -20px 20px 30px;
    }
    
    .cert-search-main {
        padding: 30px 20px;
    }
    
    .cert-features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .cert-help-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-info-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-actions {
        flex-direction: column;
    }
    
    .cert-quick-actions {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .cert-page-title {
        font-size: 28px;
    }
    
    .cert-page-subtitle {
        font-size: 16px;
    }
    
    .cert-search-stats {
        grid-template-columns: 1fr;
    }
    
    .cert-stat-number {
        font-size: 28px;
    }
}