/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", Arial, sans-serif;
}

body {
    line-height: 1.6;
    color: #333;
    background: #f8fafc;
}

/* 导航栏：通栏背景，内容1200px */
.navbar {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    padding: 14px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    width: 100%;
}
.navbar .container {
    max-width: 1200px !important;
    width: 100% !important;
    margin: 0 auto !important;
    padding: 0 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* 主工具区：1770px */
.container {
    max-width: 1770px;
    width: 100%;
    margin: 0 auto;
    padding: 0 15px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 22px;
    font-weight: bold;
    color: #2563eb;
}
.logo img {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    object-fit: cover;
}
.nav-menu {
    display: flex;
    gap: 26px;
}
.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    transition: color 0.25s ease;
}
.nav-menu a.active, 
.nav-menu a:hover {
    color: #2563eb;
    font-weight: 500;
}

/* AdSense 广告容器（合规：间距足够、不贴按钮） */
.ad-container {
    margin: 30px auto;
    max-width: 1770px;
    text-align: center;
}
.top-ad { margin-top: 20px; }
.middle-ad { margin: 50px 0; }

/* 工具区域 */
.tool-section {
    margin: 40px 0;
    text-align: center;
}
.tool-section h1 {
    font-size: 30px;
    margin-bottom: 26px;
    color: #1e293b;
}
.tool-tabs {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 9px;
    margin-bottom: 28px;
}
.tab-btn {
    padding: 10px 18px;
    border: none;
    background: #f1f5f9;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.25s ease;
}
.tab-btn:hover { background: #e2e8f0; }
.tab-btn.active {
    background: #2563eb;
    color: #fff;
}
.tool-panels {
    background: #fff;
    padding: 38px 24px;
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.panel { display: none; }
.panel.active { display: block; }

.upload-box {
    border: 2px dashed #cbd5e1;
    padding: 46px 20px;
    border-radius: 12px;
    margin-bottom: 22px;
    transition: border-color 0.25s ease;
}
.upload-box:hover { border-color: #2563eb; }
.upload-btn {
    display: inline-block;
    padding: 12px 30px;
    background: #2563eb;
    color: #fff;
    border-radius: 8px;
    cursor: pointer;
    margin-bottom: 16px;
    transition: background 0.25s ease;
    border: none;
    font-size: 15px;
}
.upload-btn:hover { background: #1d4ed8; }
.result-box {
    min-height: 50px;
    margin-top: 20px;
    font-size: 15px;
}

/* 图片预览 */
.preview-box {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 12px;
    justify-content: center;
}
.thumbnail-wrap {
    position: relative;
    display: inline-block;
}
.preview-img {
    max-width: 120px;
    max-height: 160px;
    border-radius: 6px;
    border: 1px solid #ddd;
    object-fit: cover;
    cursor: pointer;
}
.page-number {
    position: absolute;
    bottom: 4px;
    left: 4px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    font-size: 12px;
    padding: 2px 6px;
    border-radius: 4px;
}

/* 大图弹窗（合规：弹窗内不放广告） */
.image-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    display: none;
    z-index: 9999;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.image-modal.show { display: flex; }
.modal-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
}
.modal-img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: 8px;
}
.modal-close {
    position: absolute;
    top: -40px;
    right: 0;
    color: #fff;
    font-size: 30px;
    cursor: pointer;
}
.modal-download {
    display: block;
    text-align: center;
    margin-top: 15px;
    padding: 10px 24px;
    background: #2563eb;
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
}

/* 介绍/FAQ/友情链接：1200px */
.intro-section, 
.faq-section, 
.links-section {
    max-width: 1200px !important;
    width: 100% !important;
    margin: 46px auto !important;
    background: #fff;
    padding: 32px;
    border-radius: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.intro-section h2, 
.faq-section h2, 
.links-section h2 {
    font-size: 23px;
    margin-bottom: 20px;
    color: #1e293b;
}
.intro-section p {
    margin-bottom: 15px;
    font-size: 15px;
    color: #475569;
    line-height: 1.75;
}
.faq-item {
    margin-bottom: 16px;
    text-align: left;
}
.faq-item h3 {
    font-size: 16px;
    color: #2563eb;
    margin-bottom: 6px;
}
.faq-item p {
    color: #475569;
    font-size: 15px;
}
.link-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
}
.link-group a {
    color: #2563eb;
    text-decoration: none;
    font-size: 15px;
}
.link-group a:hover { text-decoration: underline; }

/* 页脚：1200px */
.footer {
    background: #1e293b;
    color: #f1f5f9;
    padding: 36px 0;
    margin-top: 50px;
    text-align: center;
}
.footer .container { max-width: 1200px !important; }
.footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 22px;
    margin-bottom: 16px;
}
.footer-links a {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 15px;
}
.copyright {
    color: #94a3b8;
    font-size: 14px;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .container { padding: 0 12px; }
    .tool-section h1 { font-size: 24px; }
    .tool-panels { padding: 28px 16px; }
    .ad-container { margin: 20px auto; }
    .navbar .container { padding: 0 12px; }
    .nav-menu { gap: 14px; }
    .nav-menu a { font-size: 15px; }
}