/*
 * -----------------------------------------------------------
 * 记密码 - 专业安全极简风样式
 * -----------------------------------------------------------
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* 基础样式 */
:root {
    --color-primary: #0F172A; /* 深岩黑 - 主色 */
    --color-secondary: #1E40AF; /* 专业蓝 - 安全都市 */
    --color-accent: #2563EB; /* 亮蓝 - 强调 */
    --color-background: #FAFAFA;
    --color-surface: #FFFFFF;
    --color-text: #09090B;
    --color-text-muted: #52525B;
    --color-border: #E2E8F0;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: var(--color-background);
    color: var(--color-text);
    -webkit-font-smoothing: antialiased;
}

/* 头部样式 - 专业安全风格 */
header {
    background-color: var(--color-surface);
    color: var(--color-text);
    padding: 60px 20px 50px;
    text-align: center;
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

header .logo {
    width: 96px;
    border-radius: 12px;
    height: auto;
    margin-bottom: 24px;
    object-fit: cover;
    box-shadow: 0 4px 12px rgba(30, 64, 175, 0.1);
}

header h1 {
    font-size: 36px;
    font-weight: 700;
    margin: 0 0 16px 0;
    letter-spacing: -0.02em;
    color: var(--color-primary);
}

header p {
    font-size: 17px;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* 返回按钮 */
.back-link {
    position: absolute;
    top: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    color: var(--color-text);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s ease;
}

.back-link:hover {
    background-color: var(--color-surface);
    border-color: var(--color-secondary);
}

/* 主要内容样式 */
main {
    padding: 60px 20px;
    max-width: 1000px;
    margin: 0 auto;
}

section {
    background: var(--color-surface);
    margin-bottom: 40px;
    padding: 40px;
    border-radius: 16px;
    border: 1px solid var(--color-border);
    box-shadow: none;
}

section h2 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 32px;
    color: var(--color-primary);
    letter-spacing: -0.02em;
}

section p {
    font-size: 15px;
    color: var(--color-text-muted);
    line-height: 1.7;
}

/* 按钮样式 - 专业安全风格 */
.btn-custom {
    background-color: var(--color-primary);
    color: #ffffff;
    border-radius: 8px;
    font-weight: 500;
    transition: background-color 0.2s ease;
}

.btn-custom:hover {
    background-color: var(--color-secondary);
    color: #ffffff;
}

/* 下载按钮样式 */
.download-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    padding: 12px 20px;
    height: 52px;
    white-space: nowrap;
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-text);
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
}

.download-btn:hover {
    background-color: var(--color-background);
    border-color: var(--color-secondary);
    color: var(--color-primary);
}

.download-btn img {
    margin-right: 10px;
}

.download-btn span {
    line-height: 1;
    font-weight: 500;
}

/* 下载按钮区域 */
.download .row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

/* 页脚样式 */
footer {
    background: var(--color-surface);
    color: var(--color-text-muted);
    text-align: center;
    padding: 32px 20px;
    margin-top: 60px;
    border-top: 1px solid var(--color-border);
}

footer p {
    margin: 0;
    font-size: 13px;
}

.downloadlogo {
    width: 24px;
    height: 24px;
}

/* FAQ按钮样式 - 专业安全风格 */
.faq-btn {
    padding: 10px 16px;
    font-size: 14px;
    background-color: var(--color-background) !important;
    border: 1px solid var(--color-border) !important;
    color: var(--color-text) !important;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.faq-btn:hover {
    background-color: var(--color-surface) !important;
    border-color: var(--color-secondary) !important;
}

/* 联系区域 */
.contact h2 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.contact h2 i {
    color: var(--color-primary);
}

.contact p {
    font-size: 15px;
    color: var(--color-text-muted);
    margin: 8px 0;
}

.contact a {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

/* 响应式 */
@media (max-width: 768px) {
    header {
        padding: 50px 20px 40px;
    }

    header h1 {
        font-size: 28px;
    }

    header p {
        font-size: 15px;
    }

    header .logo {
        width: 80px;
    }

    main {
        padding: 40px 20px;
    }

    section {
        padding: 32px 24px;
    }

    section h2 {
        font-size: 20px;
    }

    .download .row {
        grid-template-columns: 1fr;
    }

    .back-link {
        top: 10px;
        left: 10px;
        padding: 8px 12px;
        font-size: 13px;
    }
}