:root {
    --primary-color: #4fc3f7;
    --text-color: #333;
    --bg-color: #f9f9f9;
    --card-bg: #fff;
    --border-color: #eee;
    --footer-bg: #f0f0f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: all 0.3s ease;
}

header {
    background-color: var(--card-bg);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    z-index: 100;
    transition: background-color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #4fc3f7;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #4fc3f7;
}

.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 80px;
}

.hero-content {
    max-width: 600px;
    position: relative;
    z-index: 10;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    color: #333;
}

.hero p {
    font-size: 18px;
    margin-bottom: 30px;
    color: #666;
}

.btn {
    display: inline-block;
    background: #4fc3f7;
    color: #0f1621;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.btn:hover {
    background: #3da8d6;
    transform: translateY(-2px);
}

section {
    padding: 100px 0;
    position: relative;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
    font-size: 36px;
    color: #4fc3f7;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
    color: #333;
}

.about-image {
    flex: 1;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.about-image img {
    width: 100%;
    height: auto;
    display: block;
}

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

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    color: var(--text-color);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

.service-card h3 {
    margin-bottom: 15px;
    font-size: 22px;
    color: #4fc3f7;
}

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

.team-member {
    text-align: center;
    color: #fff;
}

.team-member img {
    width: 100%;
    border-radius: 50%;
    margin-bottom: 20px;
    max-width: 200px;
    border: 3px solid var(--primary-color);
}

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

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #333;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    background: var(--card-bg);
    color: var(--text-color);
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #4fc3f7;
    outline: none;
    box-shadow: 0 0 0 2px rgba(79, 195, 247, 0.2);
}

.form-group textarea {
    height: 150px;
}

footer {
    background: var(--footer-bg);
    color: var(--text-color);
    padding: 50px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-links {
    display: flex;
    justify-content: center;
    list-style: none;
    margin-bottom: 30px;
}

.footer-links li {
    margin: 0 15px;
}

.footer-links a {
    color: #333;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #4fc3f7;
}

/* 粒子背景容器 */
#particles-js {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;
}

/* 联系页面样式 */
.contact-content {
    display: flex;
    gap: 50px;
    color: var(--text-color);
}

.contact-info {
    flex: 1;
}

.contact-info ul {
    list-style: none;
    padding: 0;
}

.contact-info li {
    margin-bottom: 20px;
}

.contact-info strong {
    color: #4fc3f7;
    display: block;
    margin-bottom: 5px;
}

.contact-form {
    flex: 1;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    border: 1px solid var(--border-color);
}

.social-links {
    margin-top: 30px;
}

.social-links h4 {
    margin-bottom: 15px;
    color: #4fc3f7;
}

.social-icon {
    display: inline-block;
    margin-right: 15px;
    padding: 8px 15px;
    background: #f0f0f0;
    color: #333;
    border-radius: 5px;
    text-decoration: none;
    transition: all 0.3s;
}

.social-icon:hover {
    background: #4fc3f7;
    color: #fff;
}

/* 主题切换按钮样式 */
.theme-switcher {
    position: relative;
    display: inline-block;
}

.theme-btn {
    background: rgba(79, 195, 247, 0.1);
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--primary-color);
    padding: 10px;
    border-radius: 50%;
    transition: all 0.3s;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-btn:hover {
    background: rgba(79, 195, 247, 0.1);
    color: var(--primary-color);
}

.theme-options {
    position: absolute;
    right: 0;
    top: 100%;
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 10px 0;
    min-width: 150px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s;
    z-index: 1000;
}

.theme-switcher:hover .theme-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.theme-options button {
    display: block;
    width: 100%;
    padding: 8px 15px;
    background: none;
    border: none;
    text-align: left;
    cursor: pointer;
    color: var(--text-color);
    transition: all 0.2s;
}

.theme-options button:hover {
    background: rgba(79, 195, 247, 0.1);
    color: var(--primary-color);
}

/* 页面过渡效果 */
.page-transition {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 999;
}

.page-transition-inner {
    position: absolute;
    top: 0;
    left: 100%;
    width: 100%;
    height: 100%;
    background: var(--primary-color);
    transition: transform 0.6s cubic-bezier(0.7, 0, 0.3, 1);
}

.page-transition.active .page-transition-inner {
    transform: translateX(-100%);
}

.page-transition.reverse .page-transition-inner {
    transform: translateX(100%);
}

/* 弹窗样式 */
.theme-notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--card-bg);
    color: var(--text-color);
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s;
    z-index: 1000;
}

.theme-notification.show {
    transform: translateY(0);
    opacity: 1;
}

/* 自定义主题对话框 */
.custom-theme-dialog {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    animation: fadeIn 0.3s forwards;
}

.custom-theme-dialog .dialog-content {
    background: var(--card-bg);
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    overflow: hidden;
}

.custom-theme-dialog .dialog-header {
    padding: 15px 20px;
    background: var(--primary-color);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.custom-theme-dialog .dialog-header h3 {
    margin: 0;
    font-size: 1.2rem;
}

.custom-theme-dialog .close-btn {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 5px;
}

.custom-theme-dialog .dialog-body {
    padding: 20px;
    max-height: 60vh;
    overflow-y: auto;
}

.custom-theme-dialog .color-pickers-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.custom-theme-dialog .color-picker-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.custom-theme-dialog .color-info {
    flex: 1;
}

.custom-theme-dialog .color-info label {
    display: block;
    color: var(--text-color);
    margin-bottom: 5px;
    font-weight: 500;
}

.custom-theme-dialog .color-info .color-value {
    font-size: 0.9rem;
    color: var(--text-color);
    opacity: 0.7;
}

.custom-theme-dialog input[type="color"] {
    width: 50px;
    height: 30px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
}

.custom-theme-dialog .dialog-footer {
    padding: 15px 20px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    border-top: 1px solid var(--border-color);
}

.custom-theme-dialog .btn {
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.custom-theme-dialog .cancel-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.custom-theme-dialog .apply-btn {
    background: var(--primary-color);
    color: white;
    border: none;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 颜色对比度警告 */
.contrast-warning {
    display: none;
    align-items: center;
    background-color: #fff8e1;
    border-left: 4px solid #ffc107;
    padding: 12px 15px;
    margin-top: 20px;
    border-radius: 4px;
    animation: fadeIn 0.3s;
}

.contrast-warning i {
    color: #ffc107;
    font-size: 1.2rem;
    margin-right: 10px;
}

.contrast-warning span {
    flex: 1;
    color: var(--text-color);
    font-size: 0.9rem;
}

.warning-actions {
    display: flex;
    gap: 10px;
    margin-left: 10px;
}

.warning-actions .btn {
    padding: 6px 12px;
    font-size: 0.8rem;
}

.warning-actions .ignore-btn {
    background-color: #e0e0e0;
    color: #333;
}

.warning-actions .revert-btn {
    background-color: #ffc107;
    color: #333;
}

.warning-actions .btn:hover {
    opacity: 0.9;
}