img {
    max-width: 100%;
    height: auto;
    display: block; 
}
:root {
    --primary: #2563eb;       
    --primary-hover: #1d4ed8;
    --bg-body: #f3f4f6;       
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-sub: #6b7280;
    --danger: #ef4444;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    isolation: isolate;
}

/* 固定山景背景，不参与页面布局。 */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: linear-gradient(rgba(15, 32, 43, 0.04), rgba(15, 32, 43, 0.12)),
        url('/assets/backgrounds/misty-mountains.jpg') center / cover no-repeat;
}

/* === Header 头部区域 === */
.site-header {
    background: var(--card-bg);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 0 24px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    justify-content: space-between; 
    gap: 10px; /* 防止元素挨得太近 */
}
.nav-feedback-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f3f4f6; /* 浅灰背景，不抢眼 */
    color: #4b5563;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 20px; /* 全圆角胶囊状 */
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
    white-space: nowrap; /* 防止文字换行 */
}
.nav-feedback-btn:hover {
    background-color: #e5e7eb;
    color: var(--primary); /* 悬停变色 */
    transform: translateY(-1px);
}
.fb-icon {
    font-size: 1rem;
    margin-right: 4px;
}
/* === 移动端响应式适配 === */
/* 当屏幕宽度小于 600px 时 (手机竖屏) */
@media (max-width: 600px) {
    /* 1. 移动端品牌区域 */
    .brand h1 {
        display: none; 
    }
    
    /* 2. 隐藏“提建议”文字，只留小喇叭图标 */
    .nav-feedback-btn .fb-text {
        display: none;
    }
    
    .nav-feedback-btn {
        padding: 6px; /* 缩小按钮内边距 */
        background-color: transparent; /* 手机上背景透明，更简洁 */
    }
    
    .fb-icon {
        margin-right: 0;
        font-size: 1.2rem; /* 图标稍微放大一点 */
    }

    /* 3. 调整右侧导航条的间距 */
    .nav-pills {
        gap: 2px;
    }
    .nav-item {
        padding: 6px 10px;
        font-size: 0.85rem;
    }
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-main);
}

.brand-icon {
    width: 32px;
    height: 32px;
    object-fit: contain;
    flex: 0 0 auto;
}

.brand svg {
    width: 32px;
    height: 32px;
    color: var(--primary);
}

/* 导航按钮组 */
.nav-pills {
    display: flex;
    background: #f3f4f6;
    padding: 6px;
    border-radius: 12px;
    gap: 8px;
    border: 1px solid #e5e7eb;
}

.nav-item {
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    color: #6b7280;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-item:hover {
    background: #e5e7eb;
    color: #111827;
}

/* 选中状态 */
.nav-item.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.35);
    transform: translateY(-1px);
}

.nav-item.active:hover {
    background: var(--primary-hover);
}

/* === Body 主体区域 === */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column; 
    justify-content: flex-start;
    align-items: center;
    padding: 24px 20px 20px;
    width: 100%; 
}

.action-card {
    background: var(--card-bg);
    width: 100%;
    max-width: 540px;
    border-radius: 16px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    padding: 32px;
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.card-title {
    margin: 0 0 10px 0;
    font-size: 1.5rem;
    text-align: center;
}

/* 限制提示语 */
.limit-hint {
    text-align: center;
    color: var(--text-sub);
    font-size: 0.85rem;
    margin-bottom: 25px;
    background-color: #f9fafb;
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #e5e7eb;
}

.input-group { margin-bottom: 24px; }

textarea {
    width: 100%;
    height: 150px;
    padding: 16px;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    font-size: 1rem;
    box-sizing: border-box;
    resize: none;
    outline: none;
    transition: border-color 0.2s;
}

textarea:focus { border-color: var(--primary); }

.file-dropzone {
    border: 2px dashed #d1d5db;
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: #f9fafb;
}

.file-dropzone:hover {
    border-color: var(--primary);
    background: #eff6ff;
}

.file-icon { font-size: 2.5rem; margin-bottom: 10px; display: block; }
.file-text { color: var(--text-sub); }

.code-input {
    width: 100%;
    box-sizing: border-box;
    font-size: 2rem;
    text-align: center;
    letter-spacing: 0.5em;
    border: none;
    border-bottom: 3px solid #e5e7eb;
    padding: 10px;
    outline: none;
    background: transparent;
}
.code-input:focus { border-bottom-color: var(--primary); }

.btn-submit {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    touch-action: manipulation;
}
.btn-submit:hover { background: var(--primary-hover); }
.btn-submit:disabled { background: #9ca3af; cursor: not-allowed; }

/* 结果展示区 */
.result-panel {
    margin-top: 24px;
    padding: 20px;
    background: #ecfdf5;
    border-radius: 12px;
    text-align: center;
    display: none;
}
.result-code {
    font-size: 2.5rem;
    font-weight: 800;
    color: #059669;
    margin: 10px 0;
    font-family: monospace;
}

/* === 社会化分享组件 (正方形 APP 图标风格) === */
.social-share-box {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px dashed #e5e7eb;
}

.social-title {
    font-size: 0.85rem;
    color: #9ca3af;
    margin-bottom: 15px; /* 间距微调 */
}

.social-icons {
    display: flex;
    justify-content: center;
    gap: 20px; /* 增加图标间距 */
}

.social-btn {
    width: 48px;  /* 稍微加大尺寸 */
    height: 48px;
    border-radius: 10px; /* 【核心修改】：正方形圆角 */
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    color: white;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08); /* 柔和阴影 */
    position: relative;
    overflow: hidden;
}

.social-btn:hover {
    transform: translateY(-3px); /* 悬停上浮 */
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

.social-btn svg {
    width: 28px; /* 内部图标占比放大 */
    height: 28px;
    fill: currentColor;
}

/* 官方品牌色 (背景) */
/* 微信: #07C160 */
.btn-wechat { background: linear-gradient(135deg, #07c160 0%, #05a550 100%); }

/* QQ: #12B7F5 */
.btn-qq { background: linear-gradient(135deg, #12b7f5 0%, #0b9cd4 100%); }

/* 微博: #E6162D */
.btn-weibo { background: linear-gradient(135deg, #ea3a4e 0%, #d41429 100%); }

/* 复制: 深灰 */
.btn-copy { background: linear-gradient(135deg, #4b5563 0%, #374151 100%); }

/* 微信二维码弹层 */
#qrcode-container {
    padding: 10px;
    background: white;
    display: inline-block;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    border: 1px solid #f0f0f0;
}

/* === Footer 底部区域 === */
.site-footer { margin-top: auto; }

.footer-warning {
    background: #fff1f2;
    color: #be123c;
    text-align: center;
    padding: 12px 20px;
    font-size: 0.9rem;
    border-top: 1px solid #ffe4e6;
}

.footer-info {
    background: #1f2937;
    color: #9ca3af;
    text-align: center;
    padding: 20px;
    font-size: 0.85rem;
    line-height: 1.6;
}

/* === Modal 弹窗 === */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,0.6); 
    display: none; justify-content: center; align-items: center; z-index: 1000;
    backdrop-filter: blur(4px);
}
.modal-box {
    background: white; padding: 30px; border-radius: 16px; width: 90%; max-width: 360px; text-align: center;
}
.modal-btn {
    background: var(--primary); color: white; border: none; padding: 10px 30px; 
    border-radius: 20px; font-weight: bold; margin-top: 20px; cursor: pointer;
}
/* === 新增：友情链接区域样式 === */
.footer-links {
    background: #1f2937; /* 与底部信息背景一致 */
    color: #9ca3af;      /* 文字颜色 */
    text-align: center;
    padding: 15px 20px 5px 20px; /* 调整内边距 */
    font-size: 0.85rem;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;     /* 移动端自动换行 */
    gap: 8px;            /* 元素间距 */
    border-top: 1px solid rgba(255, 255, 255, 0.05); /* 顶部增加一条微弱的分割线 */
}

.link-label {
    font-weight: 600;
    color: #d1d5db;
}

.footer-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--primary); /* 悬停变亮蓝 */
    text-decoration: underline;
}

.footer-links .divider {
    color: #4b5563; /* 分隔符颜色变淡 */
    font-size: 0.8rem;
    margin: 0 4px;
}

/* 调整原有 footer-info 的顶部边距，让连接更紧密 */
.footer-info {
    padding-top: 10px; 
}
/* === 中部快捷切换按钮 === */
.quick-switch-box {
    margin-top: 12px;
    display: grid;
    gap: 12px;
    animation: fadeIn 0.5s ease;
}

.mode-switch-btn {
    display: block;
}

.image-preview-grid,
.received-image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.image-preview-grid img,
.received-image-card img {
    width: 100%;
    height: 110px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.received-image-card {
    min-width: 0;
}

.received-image-name {
    margin: 5px 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.8rem;
    color: var(--text-sub);
}

.received-image-card a {
    color: var(--primary);
    font-size: 0.8rem;
    text-decoration: none;
}

#image-dropzone.dragging {
    border-color: var(--primary);
    background: #eff6ff;
}

.image-preview-grid,
.received-image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    gap: 10px;
    margin-top: 14px;
}

.image-preview-grid img,
.received-image-card img {
    width: 100%;
    height: 110px;
    object-fit: cover;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.received-image-card {
    min-width: 0;
}

.received-image-name {
    margin: 5px 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.8rem;
    color: var(--text-sub);
}

.received-image-card a {
    color: var(--primary);
    font-size: 0.8rem;
    text-decoration: none;
}
.image-preview-card {
    position: relative;
    min-width: 0;
}

.image-preview-card img {
    display: block;
}

.main-content { box-sizing: border-box; }
.action-card { box-sizing: border-box; max-width: 604px; }
.share-composer {
    border: 2px dashed #d1d5db;
    border-radius: 12px;
    background: #f9fafb;
    padding: 14px;
}
.share-composer:focus-within, .share-composer.dragging {
    border-color: var(--primary);
    background: #eff6ff;
}
.share-composer #input-text-val {
    box-sizing: border-box;
    width: 100%;
    min-height: 150px;
    border: none;
    box-shadow: none;
    background: transparent;
    padding: 4px;
    resize: vertical;
}
.composer-toolbar { display: flex; gap: 10px; align-items: center; margin-top: 12px; }
.composer-toolbar button {
    border: 1px solid #cbd5e1;
    border-radius: 8px;
    padding: 8px 12px;
    background: #fff;
    color: var(--primary);
    cursor: pointer;
    font: inherit;
    font-size: 0.85rem;
}
.composer-toolbar #btn-paste { position: static; transform: none; margin-left: auto; }
/* 保留粘贴按钮和拖拽提示，暂时隐藏。Ctrl+V 与拖拽功能仍可用。 */
.composer-toolbar #btn-paste, .composer-hint { display: none; }
.composer-toolbar button:disabled { opacity: 0.5; cursor: wait; }
.composer-hint, .attachment-summary { font-size: 0.8rem; color: var(--text-sub); margin-top: 10px; }
.attachment-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(110px, 1fr)); gap: 10px; }
.attachment-grid:empty { display: none; }
.attachment-card { min-width: 0; border-radius: 8px; overflow: hidden; background: #fff; border: 1px solid #e2e8f0; }
.attachment-card img { width: 100%; height: 100px; object-fit: cover; }
.attachment-icon { height: 100px; display: grid; place-items: center; background: #f1f5f9; font-size: 32px; }
.attachment-name { padding: 7px 8px 2px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; font-size: 0.8rem; }
.attachment-size { padding: 2px 8px 8px; color: var(--text-sub); font-size: 0.75rem; }
.attachment-card a { display: block; padding: 0 8px 10px; color: var(--primary); font-size: 0.85rem; }
.received-heading { color: #059669; font-weight: bold; margin-bottom: 10px; }
.received-text { padding: 12px; margin: 10px 0 16px; border: 1px solid #e2e8f0; border-radius: 8px; background: #fff; text-align: left; white-space: pre-wrap; overflow-wrap: anywhere; max-height: 300px; overflow-y: auto; }
.burn-hint { color: #ef4444; font-size: 0.8rem; }
@media (max-width: 600px) {
    .action-card { padding: 20px; }
    .main-content { padding: 20px 12px; }
    .share-composer { padding: 10px; }
}

.image-remove-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    padding: 0;
    border: 2px solid #fff;
    border-radius: 50%;
    background: rgba(17, 24, 39, 0.8);
    color: #fff;
    font: 22px/1 Arial, sans-serif;
    cursor: pointer;
}

.image-remove-btn:hover {
    background: #dc2626;
}

.image-remove-btn:focus-visible {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
}

/* === 新增：选项区域样式 === */
.options-group {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    animation: fadeIn 0.3s;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    font-size: 0.9rem;
    color: var(--text-sub);
    transition: color 0.2s;
}

.checkbox-label:hover {
    color: var(--primary);
}

/* 隐藏原生 checkbox */
.checkbox-label input {
    display: none;
}

/* 自定义 checkbox 外观 */
.custom-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid #d1d5db;
    border-radius: 4px;
    margin-right: 8px;
    position: relative;
    transition: all 0.2s;
}

/* 选中状态 */
.checkbox-label input:checked + .custom-checkbox {
    background-color: var(--danger); /* 使用红色代表阅后即焚 */
    border-color: var(--danger);
}

/* 选中后的对勾 */
.checkbox-label input:checked + .custom-checkbox::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 2px;
    width: 4px;
    height: 9px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.label-text {
    font-weight: 500;
}
.notice-bar {
    background-color: #eff6ff; /* 淡蓝色背景 */
    border: 1px solid #dbeafe;
    border-radius: 8px;
    padding: 10px 15px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    color: #1e40af;
    animation: fadeIn 0.5s ease;
}

.notice-badge {
    background-color: #2563eb;
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    margin-right: 8px;
}

.notice-text {
    flex: 1;
}

.notice-link {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
    border-bottom: 1px solid transparent;
    margin-left: 5px;
    transition: all 0.2s;
}

.notice-link:hover {
    border-bottom-color: #2563eb;
    opacity: 0.8;
}

/* 移动端适配 */
@media (max-width: 480px) {
    .notice-bar {
        font-size: 0.85rem;
        padding: 8px 12px;
    }
}
/* === 新增：操作指南样式 === */
.guide-box {
    max-width: 600px;
    margin: 30px auto 0; /* 距上方卡片 30px */
    padding: 0 15px;
    text-align: center;
    color: #64748b;
    animation: fadeIn 0.8s ease;
}

.guide-box h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: #475569;
    opacity: 0.9;
}

.guide-steps {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 20px;
}

.step-item {
    flex: 1;
    background: rgba(255, 255, 255, 0.6);
    padding: 15px 10px;
    border-radius: 12px;
    border: 1px solid rgba(226, 232, 240, 0.6);
    display: flex;
    flex-direction: column;
    align-items: center;
    transition: transform 0.2s;
}

.step-item:hover {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.step-icon {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.step-text {
    font-size: 0.85rem;
    line-height: 1.4;
    color: #4b5563;
}

.step-text strong {
    color: var(--primary);
    font-weight: 600;
}


/* 移动端适配：改为垂直排列或紧凑网格 */
@media (max-width: 480px) {
    .guide-steps {
        flex-direction: column; /* 手机上垂直排列 */
        gap: 10px;
    }
    .step-item {
        flex-direction: row; /* 图标在左，文字在右 */
        text-align: left;
        padding: 12px 20px;
    }
    .step-icon {
        margin-bottom: 0;
        margin-right: 15px;
    }
}
/* === Blog 博客系统样式 === */
.blog-container {
    max-width: 800px;
    margin: 40px auto;
    padding: 0 20px;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.blog-header {
    text-align: center;
    margin-bottom: 50px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.blog-title {
    font-size: 2rem;
    color: #1e293b;
    margin-bottom: 10px;
}

.blog-meta {
    color: #94a3b8;
    font-size: 0.9rem;
}

/* 文章列表页 */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.article-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
    display: block;
}

.article-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
    border-color: #cbd5e1;
}

.article-card h2 {
    font-size: 1.25rem;
    color: #334155;
    margin: 0 0 10px 0;
}

.article-card p {
    color: #64748b;
    font-size: 0.95rem;
    line-height: 1.6;
    margin: 0;
}

/* 文章详情页 */
.article-content {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    line-height: 1.8;
    color: #334155;
}

.article-content h2 {
    font-size: 1.5rem;
    color: #1e293b;
    margin-top: 40px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f1f5f9;
}

.article-content p {
    margin-bottom: 20px;
    font-size: 1.05rem;
}

.article-content ul {
    margin-bottom: 20px;
    padding-left: 20px;
}

.article-content li {
    margin-bottom: 10px;
}

.back-home {
    display: inline-flex;
    align-items: center;
    margin-bottom: 30px;
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
}

.back-home:hover { text-decoration: underline; }

/* 移动端适配 */
@media (max-width: 600px) {
    .blog-container { margin: 20px auto; }
    .article-content { padding: 20px; }
    .blog-title { font-size: 1.5rem; }
}
/* === Header 功能区布局优化 === */
.header-actions {
    display: flex;
    gap: 15px; /* 两个按钮之间的间距 */
    align-items: center;
}

/* 统一胶囊按钮样式 */
.nav-btn-pill {
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #f1f5f9;
    color: #475569;
    text-decoration: none;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.2s ease;
    cursor: pointer;
    white-space: nowrap;
}

.nav-btn-pill:hover {
    background-color: #e2e8f0;
    color: var(--primary);
    transform: translateY(-1px);
}

.nav-btn-pill .icon { margin-right: 4px; }

/* === 小程序入口 & 下拉二维码 === */
.mp-entry {
    position: relative; /* 作为定位父级 */
}

/* 默认隐藏二维码 */
.mp-dropdown {
    display: none;
    position: absolute;
    top: 100%; /* 在按钮正下方 */
    left: 50%;
    transform: translateX(-50%); /* 水平居中 */
    margin-top: 10px;
    background: white;
    padding: 15px;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    text-align: center;
    border: 1px solid #e2e8f0;
    z-index: 1000;
    width: 140px;
    animation: fadeIn 0.2s ease;
}

/* 小三角箭头 (装饰用) */
.mp-dropdown::before {
    content: "";
    position: absolute;
    top: -6px;
    left: 50%;
    margin-left: -6px;
    border-width: 0 6px 6px;
    border-style: solid;
    border-color: #fff transparent; /* 确保背景色和卡片一致 */
    display: block;
    width: 0;
    z-index: 1;
}
/* 给箭头加个阴影边框效果略微复杂，这里简化处理，只做指向 */

/* 鼠标悬停时显示 */
.mp-entry:hover .mp-dropdown {
    display: block;
}

.mp-dropdown img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    display: block;
    margin: 0 auto 8px;
}

.mp-dropdown p {
    font-size: 0.75rem;
    color: #64748b;
    margin: 0;
    line-height: 1.4;
}

/* === 移动端适配 === */
@media (max-width: 600px) {
    /* 手机上隐藏文字，只留图标，防止头部拥挤 */
    .nav-btn-pill .text {
        display: none;
    }
    .nav-btn-pill {
        padding: 6px 8px;
    }
    .nav-btn-pill .icon {
        margin-right: 0;
        font-size: 1.1rem;
    }
    .header-actions {
        gap: 8px;
    }
    
    /* 手机点击后显示的二维码位置调整 */
    .mp-dropdown {
        left: -20px; /* 稍微往左偏一点，防止超出屏幕 */
        transform: none;
    }
}
/* === [新增] 首页插件推广横幅 === */
.promo-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(90deg, #eff6ff 0%, #dbeafe 100%);
    border: 1px solid #bfdbfe;
    border-radius: 50px; /* 圆角胶囊样式 */
    padding: 10px 20px;
    margin-bottom: 20px; /* 与下方卡片的间距 */
    text-decoration: none;
    color: #1e40af;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(37, 99, 235, 0.05);
    width: 100%;
    max-width: 480px; /* 与下方卡片宽度保持一致 */
    box-sizing: border-box;
}

.promo-banner:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.15);
    border-color: #60a5fa;
    background: #fff;
}

.promo-banner .tag {
    background: #f97316; /* 醒目的橙色 */
    color: white;
    font-size: 0.7rem;
    font-weight: bold;
    padding: 2px 8px;
    border-radius: 4px;
    margin-right: 10px;
    letter-spacing: 0.5px;
}

.promo-banner .text {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 移动端适配：字体稍微调小 */
@media (max-width: 480px) {
    .promo-banner {
        font-size: 0.85rem;
        padding: 8px 15px;
    }
}
/* === 移动端专项适配 (手机屏幕) === */
@media screen and (max-width: 600px) {

    html, body {
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

    .site-header,
    .main-content,
    .action-card,
    .modal-box {
        box-sizing: border-box;
    }

    .site-header {
        width: 100%;
        padding: 0 16px;
    }

    .brand-icon {
        width: 36px;
        height: 36px;
    }

    /* 1. 调整容器边距，利用宝贵的手机空间 */
    .container, .main-content {
        padding: 15px; /* 电脑端可能是 20px 或更多，手机端减小 */
    }

    /* 2. 核心卡片 (白色背景区域) */
    .action-card {
        padding: 20px 15px; /* 减小内边距 */
        width: 100%;       /* 占满宽度 */
        box-shadow: none;  /* 手机端通常去掉大阴影，看起来更清爽 */
        border: 1px solid #f1f5f9; /* 改用淡边框 */
    }

    /* 3. 标题字体变小 */
    .card-title {
        font-size: 1.25rem; /* 原来可能是 1.5rem */
    }

    /* 4. 输入框高度调整，方便手指点击 */
    textarea, .file-dropzone {
        min-height: 120px; /* 稍微减小高度，避免占满一屏 */
    }

    /* 5. [关键] 修复刚才加的推广横幅 */
    .promo-banner {
        font-size: 0.8rem;      /* 字号改小 */
        padding: 8px 12px;      /* 减小内边距 */
        flex-direction: row;    /* 保持横向 */
        justify-content: flex-start; /* 内容靠左 */
        text-align: left;
    }
    
    .promo-banner .text {
        white-space: nowrap;      /* 不换行 */
        overflow: hidden;         /* 超出隐藏 */
        text-overflow: ellipsis;  /* 显示省略号... */
        display: block;
        max-width: 260px;         /* 限制文字宽度，防止撑开 */
    }
    
    .promo-banner .tag {
        font-size: 0.6rem;        /* 标签也变小 */
        padding: 1px 6px;
    }
}

* {
    -webkit-tap-highlight-color: transparent; /* 去掉点击时的灰色背景块 */
}
/* === [新增] 输入框内的粘贴按钮 === */
#btn-paste {
    position: absolute;
    bottom: 15px;
    right: 15px;
    background: rgba(255, 255, 255, 0.95); /* 背景稍微不透明一点 */
    border: 1px solid #cbd5e1;
    color: #64748b;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    z-index: 100; /* [关键] 提高层级，防止被 textarea 盖住 */
}

#btn-paste:hover {
    background: #eff6ff;
    color: #2563eb;
    border-color: #bfdbfe;
    transform: translateY(-2px);
}

/* === [新增] 接收结果页的小按钮 === */
.btn-mini-copy {
    background: #ecfdf5;
    color: #059669;
    border: 1px solid #6ee7b7;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    cursor: pointer;
    margin-left: 10px;
    transition: all 0.2s;
}
.btn-mini-copy:hover {
    background: #d1fae5;
}
#area-text {
    position: relative !important; /* 强制父级为定位基准 */
}
/* === [新增] 接收结果页的“一键复制”按钮 === */
.btn-mini-copy {
    background-color: #f0fdf4; /* 淡绿色背景 */
    color: #16a34a;            /* 深绿色文字 */
    border: 1px solid #bbf7d0; /* 绿色边框 */
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px; /* 图标和文字间距 */
    transition: all 0.2s ease;
}

.btn-mini-copy:hover {
    background-color: #dcfce7;
    transform: translateY(-1px); /* 悬停微动效果 */
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.btn-mini-copy:active {
    transform: translateY(1px);
}

/* ====== Hero 区域 ====== */
.hero-section {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 50%, #f0f9ff 100%);
    text-align: center;
    padding: 48px 20px 32px;
    border-bottom: 1px solid #bfdbfe;
}
.hero-content { max-width: 700px; margin: 0 auto; }
.hero-title { font-size: 2rem; color: #1e293b; margin: 0 0 16px; font-weight: 800; }
.hero-title .highlight { color: #2563eb; }
.hero-desc { font-size: 1.05rem; color: #475569; line-height: 1.8; margin: 0 0 24px; }
.hero-desc .highlight { color: #2563eb; font-weight: 600; }
.hero-platforms { display: flex; justify-content: center; align-items: center; gap: 12px; flex-wrap: wrap; }
.platform-badge { background: #fff; border: 1px solid #bfdbfe; padding: 6px 16px; border-radius: 20px; font-size: 0.9rem; color: #1e40af; font-weight: 600; }
.platform-plus { color: #93c5fd; font-weight: 700; font-size: 1.1rem; }

/* ====== 通用区块容器 ====== */
.section-container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.section-title { text-align: center; font-size: 1.6rem; color: #1e293b; margin: 0 0 10px; font-weight: 700; }
.section-subtitle { text-align: center; color: #64748b; font-size: 1rem; margin: 0 0 40px; }

/* ====== 特性亮点区 ====== */
.features-section { padding: 60px 20px; background: #fff; }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 16px; }
.feature-card { background: #f8fafc; padding: 28px 24px; border-radius: 14px; border: 1px solid #e2e8f0; transition: transform 0.2s, box-shadow 0.2s; }
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,0,0,0.06); }
.feature-icon { font-size: 2.2rem; margin-bottom: 12px; }
.feature-card h3 { font-size: 1.1rem; color: #1e293b; margin: 0 0 8px; }
.feature-card p { font-size: 0.95rem; color: #64748b; margin: 0; line-height: 1.7; }

/* ====== 场景区 ====== */
.usecase-section { padding: 60px 20px; background: #f8fafc; }
.usecase-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; margin-top: 16px; }
.usecase-card { background: #fff; padding: 28px 24px; border-radius: 14px; border: 1px solid #e2e8f0; transition: transform 0.2s; }
.usecase-card:hover { transform: translateY(-2px); box-shadow: 0 4px 15px rgba(0,0,0,0.05); }
.usecase-card h3 { font-size: 1.1rem; color: #1e293b; margin: 0 0 8px; }
.usecase-card p { font-size: 0.95rem; color: #64748b; margin: 0; line-height: 1.7; }

/* ====== 跨平台展示区 ====== */
.platform-section { padding: 60px 20px; background: #fff; }
.platform-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 24px; margin-top: 16px; }
.platform-card { background: #f8fafc; padding: 32px 24px; border-radius: 14px; border: 1px solid #e2e8f0; text-align: center; transition: transform 0.2s; }
.platform-card:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,0,0,0.06); }
.platform-icon { font-size: 2.8rem; margin-bottom: 14px; }
.platform-card h3 { font-size: 1.15rem; color: #1e293b; margin: 0 0 10px; }
.platform-card p { font-size: 0.9rem; color: #64748b; margin: 0 0 16px; line-height: 1.7; }
.platform-link { display: inline-block; color: #2563eb; font-weight: 600; text-decoration: none; font-size: 0.9rem; border: 1px solid #bfdbfe; padding: 6px 18px; border-radius: 20px; transition: all 0.2s; }
.platform-link:hover { background: #eff6ff; border-color: #93c5fd; }

/* ====== 博客预览区 ====== */
.blog-preview-section { padding: 60px 20px; background: #f8fafc; }
.blog-preview-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }
.blog-preview-card { background: #fff; padding: 24px; border-radius: 12px; border: 1px solid #e2e8f0; text-decoration: none; color: inherit; transition: transform 0.2s, box-shadow 0.2s; display: block; position: relative; }
.blog-preview-card:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,0,0,0.06); border-color: #bfdbfe; }
.blog-preview-card h3 { font-size: 1rem; color: #1e293b; margin: 0 0 8px; line-height: 1.5; }
.blog-preview-card p { font-size: 0.88rem; color: #64748b; margin: 0; line-height: 1.6; }
.blog-preview-tag { position: absolute; top: 12px; right: 12px; font-size: 0.7rem; padding: 2px 8px; border-radius: 4px; font-weight: 600; }
.tag-hot { background: #ffedd5; color: #9a3412; }

/* ====== 移动端适配 ====== */
@media (max-width: 600px) {
    .hero-title { font-size: 1.4rem; }
    .hero-desc { font-size: 0.95rem; }
    .hero-section { padding: 32px 16px 24px; }
    .features-section, .usecase-section, .platform-section, .blog-preview-section { padding: 40px 16px; }
    .section-title { font-size: 1.3rem; }
    .features-grid, .usecase-grid { grid-template-columns: 1fr; }
    .platform-cards { grid-template-columns: 1fr; }
    .blog-preview-grid { grid-template-columns: 1fr; }
}

/* ====== 页面布局修复 ====== */
.site-header { margin-bottom: 0; }

/* ====== 通用内容页导航 ====== */
.nav-btn-pill.active-nav { background: #eff6ff; color: #2563eb; border: 1px solid #bfdbfe; }