/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 色彩变量 */
:root {
    --primary-color: #0070f3;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --success-color: #10b981;
    --light-color: #f5f7fa;
    --dark-color: #374151;
    --gray-color: #6b7280;
    --border-color: #e5e7eb;
    --background-color: #fff;
    --text-color: #111827;
    --text-secondary-color: #6b7280;
    --card-background: #fff;
    --card-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --card-shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen,
        Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    overflow-x: hidden;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header:hover {
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.2);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo h1 {
    font-size: 28px;
    color: #fff;
    margin: 0;
    font-weight: 700;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.logo h1:hover {
    transform: scale(1.05);
}

/* 导航菜单 */
.nav {
    display: flex;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 10px 15px;
    display: block;
    transition: all 0.3s ease;
    font-weight: 500;
    border-radius: 6px;
    position: relative;
    overflow: hidden;
}

.nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
    list-style: none;
    width: 220px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    border-radius: 8px;
    overflow: hidden;
    transform: translateY(10px);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-link {
    color: var(--text-color);
    text-decoration: none;
    padding: 12px 20px;
    display: block;
    transition: all 0.3s ease;
    border-bottom: 1px solid var(--border-color);
}

.dropdown-link:last-child {
    border-bottom: none;
}

.dropdown-link:hover {
    background: linear-gradient(135deg, var(--light-color) 0%, #e5e7eb 100%);
    color: var(--primary-color);
    transform: translateX(5px);
    font-weight: 500;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 32px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: #fff;
    transition: all 0.3s ease;
    border-radius: 2px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.mobile-menu-btn:hover span {
    background-color: #fff;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
    box-shadow: 0 0 0 rgba(0, 0, 0, 0.2);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -7px);
    box-shadow: 0 0 0 rgba(0, 0, 0, 0.2);
}

/* 主内容区域 */
.main {
    padding: 40px 0;
    min-height: calc(100vh - 200px);
}

/* 英雄区域 */
.hero {
    text-align: center;
    padding: 120px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    margin-bottom: 60px;
    position: relative;
    overflow: hidden;
    color: #fff;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"><path d="M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23-11c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-6 60c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm29 22c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zM32 63c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm57-13c2.76 0 5-2.24 5-5s-2.24-5-5-5-5 2.24-5 5 2.24 5 5 5zm-9-21c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM60 91c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM35 41c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2zM12 60c1.105 0 2-.895 2-2s-.895-2-2-2-2 .895-2 2 .895 2 2 2z" fill="%23ffffff" fill-opacity="0.1" fill-rule="evenodd"/></svg>');
    opacity: 0.3;
    z-index: 0;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 24px;
    color: #fff;
    position: relative;
    z-index: 1;
    font-weight: 700;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}

.hero-description {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 48px;
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.8;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 16px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 1;
}

.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: all 0.5s ease;
    z-index: -1;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, #0070f3 0%, #0056b3 100%);
    color: #fff;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0056b3 0%, #003d82 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 112, 243, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-link {
    background: none;
    color: #fff;
    padding: 0;
    text-decoration: underline;
    box-shadow: none;
    font-size: 18px;
}

.btn-link:hover {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transform: none;
    box-shadow: none;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 24px;
    position: relative;
    z-index: 1;
    flex-wrap: wrap;
}

/* 产品展示 */
.products {
    margin-bottom: 80px;
    position: relative;
}

.products h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
    color: var(--text-color);
    font-weight: 700;
    position: relative;
}

.products h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 2px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.product-card {
    background: linear-gradient(135deg, var(--card-background) 0%, #f9fafb 100%);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.18);
    border-color: var(--primary-color);
}

.product-card h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.product-card p {
    color: var(--text-secondary-color);
    margin-bottom: 30px;
    height: auto;
    overflow: visible;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

.product-card .btn {
    position: relative;
    z-index: 1;
    margin-top: 20px;
    border-radius: 8px;
    padding: 12px 24px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    color: #fff;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.product-card .btn:hover {
    background: linear-gradient(135deg, #0056b3 0%, #003d82 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 112, 243, 0.4);
}

/* 关于我们 */
.about {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    padding: 100px 0;
    margin-bottom: 80px;
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 112, 243, 0.1) 0%, transparent 70%);
    z-index: 0;
}

.about::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 50%;
    height: 150%;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
    z-index: 0;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.about h2 {
    font-size: 36px;
    margin-bottom: 30px;
    color: var(--text-color);
    font-weight: 700;
    position: relative;
}

.about h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 2px;
}

.about-text {
    margin-bottom: 40px;
    line-height: 2;
    color: var(--text-secondary-color);
    font-size: 18px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.about-button {
    text-align: center;
    margin-top: 30px;
}

.about-button .btn {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: #fff;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.about-button .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, #0056b3 0%, #059669 100%);
}

/* Markdown 内容样式 */
.markdown-content {
    margin: 60px 0;
    line-height: 1.8;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin: 40px 0 20px;
    color: var(--text-color);
    font-weight: 700;
    position: relative;
    line-height: 1.3;
}

.markdown-content h1 {
    font-size: 36px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.markdown-content h2 {
    font-size: 28px;
    color: var(--dark-color);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.markdown-content h3 {
    font-size: 24px;
    color: var(--primary-color);
}

.markdown-content h4 {
    font-size: 20px;
    color: var(--dark-color);
}

.markdown-content h5 {
    font-size: 18px;
    color: var(--dark-color);
}

.markdown-content h6 {
    font-size: 16px;
    color: var(--dark-color);
}

.markdown-content p {
    margin-bottom: 25px;
    color: var(--text-secondary-color);
    font-size: 16px;
}

.markdown-content ul,
.markdown-content ol {
    margin: 25px 0;
    padding-left: 30px;
    color: var(--text-secondary-color);
}

.markdown-content li {
    margin-bottom: 12px;
    font-size: 16px;
    position: relative;
}

.markdown-content ul li::before {
    content: '▸';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: -20px;
}

.markdown-content ol li {
    counter-increment: list-item;
    position: relative;
}

.markdown-content ol li::before {
    content: counter(list-item) '.';
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: -25px;
}

.markdown-content a {
    color: var(--primary-color);
    text-decoration: none;
    position: relative;
    transition: all 0.3s ease;
}

.markdown-content a:hover {
    color: var(--secondary-color);
}

.markdown-content a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transition: width 0.3s ease;
}

.markdown-content a:hover::after {
    width: 100%;
}

.markdown-content img {
    max-width: 100%;
    height: auto;
    margin: 30px 0;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.markdown-content img:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
}

.markdown-content code {
    background-color: rgba(16, 185, 129, 0.1);
    padding: 3px 8px;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    color: var(--success-color);
    font-weight: 500;
}

.markdown-content pre {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 30px 0;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    position: relative;
}

.markdown-content pre code {
    background: none;
    padding: 0;
    color: #e2e8f0;
    font-size: 14px;
    font-weight: normal;
    line-height: 1.6;
}

.markdown-content blockquote {
    border-left: 4px solid var(--primary-color);
    padding: 20px 30px;
    margin: 30px 0;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    color: var(--dark-color);
    border-radius: 0 8px 8px 0;
    font-style: italic;
    position: relative;
}

.markdown-content blockquote::before {
    content: '"';
    font-size: 60px;
    color: var(--primary-color);
    opacity: 0.2;
    position: absolute;
    top: -10px;
    left: 10px;
    font-family: Georgia, serif;
}

.markdown-content hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 40px 0;
    position: relative;
}

.markdown-content hr::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 2px;
}

/* 页脚样式 */
.footer {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    color: #fff;
    padding: 80px 0 40px;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(0, 112, 243, 0.1) 0%, transparent 70%);
    z-index: 0;
}

.footer::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 50%;
    height: 150%;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, transparent 70%);
    z-index: 0;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
    position: relative;
    z-index: 1;
}

.footer-column h3 {
    font-size: 24px;
    margin-bottom: 25px;
    color: #fff;
    font-weight: 700;
    position: relative;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 2px;
}

.footer-column h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #fff;
    font-weight: 600;
}

.footer-column p {
    color: #cbd5e1;
    margin-bottom: 25px;
    line-height: 1.7;
    font-size: 16px;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 15px;
    position: relative;
}

.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 16px;
    position: relative;
    padding-left: 20px;
}

.footer-links a::before {
    content: '▸';
    color: var(--primary-color);
    position: absolute;
    left: 0;
    transition: transform 0.3s ease;
}

.footer-links a:hover {
    color: #fff;
    padding-left: 25px;
}

.footer-links a:hover::before {
    transform: translateX(5px);
    color: var(--secondary-color);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-link {
    color: #cbd5e1;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 18px;
    padding: 10px 15px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-link:hover {
    color: #fff;
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 112, 243, 0.4);
}

.contact-info {
    list-style: none;
}

.contact-info li {
    margin-bottom: 15px;
    color: #cbd5e1;
    font-size: 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.contact-info li::before {
    content: '✓';
    color: var(--secondary-color);
    font-weight: bold;
    margin-top: 2px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    position: relative;
    z-index: 1;
}

.footer-bottom p {
    color: #cbd5e1;
    margin: 0;
    font-size: 14px;
}

.footer-bottom-links {
    display: flex;
    gap: 25px;
}

.footer-bottom-links a {
    color: #cbd5e1;
    text-decoration: none;
    transition: all 0.3s ease;
    font-size: 14px;
    position: relative;
}

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

.footer-bottom-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    transition: width 0.3s ease;
}

.footer-bottom-links a:hover::after {
    width: 100%;
}

/* 404 页面 */
.error-404 {
    text-align: center;
    padding: 120px 0;
    background: linear-gradient(135deg, #fef3c7 0%, #fee2e2 100%);
    min-height: calc(100vh - 200px);
    position: relative;
    overflow: hidden;
}

.error-404::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 60%;
    height: 200%;
    background: radial-gradient(circle, rgba(245, 158, 11, 0.1) 0%, transparent 70%);
    z-index: 0;
}

.error-404::after {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 50%;
    height: 150%;
    background: radial-gradient(circle, rgba(239, 68, 68, 0.1) 0%, transparent 70%);
    z-index: 0;
}

.error-404 h1 {
    font-size: 120px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 30px;
    font-weight: 700;
    position: relative;
    z-index: 1;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.error-404 h2 {
    font-size: 32px;
    margin-bottom: 25px;
    color: var(--text-color);
    position: relative;
    z-index: 1;
    font-weight: 600;
}

.error-404 p {
    color: var(--text-secondary-color);
    margin-bottom: 40px;
    font-size: 18px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
    line-height: 1.7;
}

.error-404 .btn {
    position: relative;
    z-index: 1;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: #fff;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 18px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.error-404 .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 112, 243, 0.4);
    background: linear-gradient(135deg, #0056b3 0%, #059669 100%);
}

/* 表单样式 */
.form-group {
    margin-bottom: 25px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-color);
    font-size: 16px;
}

.form-input,
.form-textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.95);
    color: var(--text-color);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.form-input:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 112, 243, 0.1);
    background: #fff;
    transform: translateY(-2px);
}

.form-textarea {
    resize: vertical;
    min-height: 180px;
    line-height: 1.6;
}

.form-submit {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: #fff;
    padding: 15px 32px;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    width: 100%;
    margin-top: 20px;
}

.form-submit:hover {
    background: linear-gradient(135deg, #0056b3 0%, #059669 100%);
    transform: translateY(-3px);
    box-shadow: 0 6px 25px rgba(0, 112, 243, 0.4);
}

.form-submit:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(0, 112, 243, 0.3);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-secondary-color);
    opacity: 0.7;
}

.form-input:focus::placeholder,
.form-textarea:focus::placeholder {
    opacity: 0.5;
}