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

/* 基础样式 */
:root {
    --primary-color: #00a8ff;  /* 修改为蓝色 */
    --primary-color-rgb: 0, 168, 255; /* 添加RGB格式的主色 */
    --secondary-color: #a0aec0;
    --background-color: #121212; /* 修改为深色背景 */
    --text-color: #ffffff; /* 修改为白色文本 */
    --heading-color: #ffffff; /* 添加标题颜色变量 */
    --light-gray: #1e1e1e; /* 修改为深灰色 */
    --border-color: #2d3748;
    --hover-color: #0088cc;
    --card-bg: #1a1a1a; /* 新增卡片背景色 */
}

/* 亮色主题变量 */
.light-theme {
    --primary-color: #3182ce;
    --primary-color-rgb: 49, 130, 206; /* 亮色主题的RGB格式主色 */
    --secondary-color: #718096;
    --background-color: #f7fafc;
    --text-color: #2d3748;
    --heading-color: #1a202c; /* 亮色主题标题颜色 */
    --light-gray: #edf2f7;
    --border-color: #e2e8f0;
    --hover-color: #2c5282;
    --card-bg: #ffffff;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--background-color);
}

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

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

/* 头部样式 */
header {
    background-color: rgba(18, 18, 18, 0.9);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
    transition: transform 0.3s, box-shadow 0.3s;
}

/* ... 复制原有的styles.css其余内容 ... */

/* 继续header样式 */
header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo img {
    height: 40px;
}

nav ul {
    display: flex;
    gap: 30px;
}

nav a {
    color: var(--text-color);
    font-weight: 500;
    transition: color 0.3s;
}

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

.auth-buttons {
    display: flex;
    gap: 15px;
}

.login-btn {
    padding: 8px 20px;
    border-radius: 5px;
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    transition: all 0.3s;
}

.login-btn:hover {
    background-color: var(--primary-color);
    color: var(--background-color);
}

/* 特性区域样式 */
.features {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.section-header p {
    color: var(--secondary-color);
    max-width: 600px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

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

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.feature-card p {
    color: var(--secondary-color);
}

/* 页脚样式 */
footer {
    background-color: var(--light-gray);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    margin-bottom: 20px;
}

.footer-logo img {
    height: 40px;
}

.footer-description {
    color: var(--secondary-color);
    margin-bottom: 20px;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--card-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--secondary-color);
    transition: all 0.3s ease;
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: white;
}

.footer-column h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-color);
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 0;
    border: none;
    margin-top: 0;
}

.beian-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 10px;
}

.beian-icon {
    height: 14px;
    margin-right: 5px;
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

/* 主按钮样式变体 */
.btn-primary.solid {
    /* 默认实心样式 */
}

.btn-primary.outline {
    background-color: transparent !important;
    border: 2px solid !important;
}

.btn-primary.gradient {
    background-image: linear-gradient(45deg, var(--primary-color), #0088cc) !important;
    background-color: transparent !important;
}

.btn-primary.glow {
    box-shadow: 0 0 15px var(--primary-color) !important;
}

/* 副按钮样式变体 */
.btn-secondary.solid {
    /* 默认实心样式 */
}

.btn-secondary.outline {
    background-color: transparent !important;
    border: 2px solid !important;
}

.btn-secondary.text {
    background: none !important;
    border: none !important;
    padding: 8px 16px !important;
    text-decoration: underline !important;
    box-shadow: none !important;
}

/* 视频占位符样式 */
.video-placeholder {
    width: 100%;
    height: 100%;
    min-height: 300px;
    background-color: #1a1a1a;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-size: 1.2rem;
    border-radius: 8px;
}

/* 主题切换按钮 */
.theme-toggle {
    cursor: pointer;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--card-bg);
    margin-right: 10px;
    transition: background-color 0.3s;
}

.theme-toggle:hover {
    background-color: var(--hover-color);
}

.theme-toggle i {
    font-size: 18px;
    color: var(--text-color);
}

/* 语言选择器 */
.language-selector {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    background-color: var(--card-bg);
    margin-right: 15px;
}

.language-selector span {
    margin-right: 5px;
    font-size: 14px;
}

.language-selector i {
    font-size: 12px;
}

/* 输入框样式 - 添加到 styles.css 文件末尾 */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"],
input[type="tel"],
input[type="number"],
textarea,
select {
    background-color: #ffffff !important; /* 强制使用白色背景 */
    color: #333333 !important; /* 强制使用深色文本 */
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 4px;
    font-size: 16px;
    width: 100%;
    transition: border-color 0.3s, box-shadow 0.3s;
}

/* 输入框焦点样式 */
input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 168, 255, 0.2);
}

/* 输入框占位符文本颜色 */
::placeholder {
    color: #777777;
    opacity: 1;
}