// ==UserScript==
// @name         SuperGit - Github国内加速助手
// @namespace    https://hsya.top/
// @version      1.8.0
// @description  专为国内开发者打造。自动在 GitHub 页面注入「镜像下载」按钮，覆盖 Release、Raw、Clone ZIP 等 8 大场景，一键选择最优镜像节点，下载速度提升数十倍。
// @author       划水鸭
// @homepage     https://hsya.top/supergit.html
// @match        *://github.com/*
// @match        *://gist.github.com/*
// @match        *://*.github.com/*
// @connect      github.com
// @connect      githubusercontent.com
// @connect      codeload.github.com
// @connect      bgithub.xyz
// @connect      raw.githubusercontent.com
// @connect      raw.bgithub.xyz
// @connect      api.akams.cn
// @connect      *
// @icon         https://hsya.top/static/img/supergit.png
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_xmlhttpRequest
// @grant        GM_download
// @grant        GM_openInTab
// @grant        GM_addStyle
// @grant        GM_info
// @grant        GM_registerMenuCommand
// @run-at       document-idle
// ==/UserScript==

(function() {
	'use strict';
	if (window.__supergit_injected) return;
	window.__supergit_injected = true;

	const VERSION = 'v' + GM_info.script.version;

	// 图标：GitHub CSP 限制外域 img-src，需通过 GM_xmlhttpRequest 预加载转 base64
	const ICON_URL = 'https://hsya.top/static/img/supergit.png';
	let ICON_URI = 'data:image/svg+xml,' + encodeURIComponent(
		'<svg t="1780135787014" class="icon" viewBox="0 0 1024 1024" version="1.1" xmlns="http://www.w3.org/2000/svg" p-id="6448" width="200" height="200"><path d="M636.992 571.104c13.728 0 25.28 6.72 35.264 20.352 9.92 13.504 14.976 30.208 14.976 49.92 0 19.808-4.992 36.512-14.976 50.016s-21.696 20.288-35.264 20.288c-14.432 0-26.848-6.72-36.832-20.288-9.824-13.504-14.88-30.208-14.88-50.016s4.896-36.448 14.88-49.92c9.984-13.664 22.464-20.352 36.832-20.352z m176.608-182.88c38.464 41.696 57.888 92.288 57.888 151.616 0 38.496-4.544 73.152-13.28 103.968-8.896 30.656-20.128 55.776-33.536 74.976a214.56 214.56 0 0 1-50.08 50.72c-19.904 14.752-38.24 25.28-54.784 32.064s-35.584 12.032-57.12 15.68c-21.28 3.744-37.376 5.76-48.544 6.336-10.752 0.48-22.464 0.704-35.104 0.704-2.816 0-12.32 0.32-28.128 0.768-15.424 0.64-28.672 0.928-38.976 0.928s-23.552-0.32-38.976-0.928a1798.08 1798.08 0 0 0-28.128-0.768c-12.64 0-24.448-0.16-35.136-0.704-11.2-0.544-27.264-2.56-48.448-6.336a256.736 256.736 0 0 1-57.184-15.68c-16.544-6.72-34.848-17.312-54.656-32.064a218.624 218.624 0 0 1-50.176-50.72c-13.408-19.2-24.704-44.32-33.536-74.976-8.704-30.816-13.248-65.472-13.248-103.968 0-59.328 19.36-109.92 57.92-151.616-4.256-2.08-4.48-22.848-0.672-62.464 3.424-39.648 11.84-76.16 25.504-109.472 48.096 5.12 107.264 32.256 178.144 81.248 23.936-6.24 56.704-9.44 98.496-9.44 43.84 0 76.608 3.2 98.528 9.44 32.288-21.792 63.2-39.648 92.672-53.216 29.952-13.408 51.488-21.344 65.056-23.392l20.288-4.64c13.728 33.312 22.144 69.92 25.6 109.472 3.968 39.584 3.744 60.384-0.48 62.464z m-299.936 401.632c86.496 0 151.712-10.368 196-31.136 44.16-20.832 66.624-63.68 66.624-128.256 0-37.44-14.112-68.8-42.304-93.824a95.712 95.712 0 0 0-51.04-24.992c-19.04-3.136-48.448-3.136-88.16 0-39.552 3.2-66.624 4.64-81.184 4.64-19.808 0-41.312-1.056-68-3.136a2103.584 2103.584 0 0 0-62.528-3.904 192.672 192.672 0 0 0-49.216 5.504c-17.824 4.256-32.256 11.424-43.936 21.792-26.88 24-40.512 55.2-40.512 93.824 0 64.608 21.888 107.424 65.6 128.192 43.68 20.896 108.704 31.2 195.232 31.2z m-125.088-218.752c13.568 0 25.248 6.72 35.136 20.352 9.92 13.504 14.944 30.208 14.944 49.92 0 19.808-4.96 36.512-14.944 50.016-9.888 13.504-21.664 20.288-35.136 20.288-14.56 0-26.912-6.72-36.896-20.288-9.888-13.504-14.944-30.208-14.944-50.016s4.96-36.448 14.944-49.92c9.984-13.664 22.368-20.352 36.896-20.352z" fill="#ffffff" p-id="6449"></path></svg>'
	);

	function preloadIcon() {
		return new Promise((resolve) => {
			GM_xmlhttpRequest({
				method: 'GET',
				url: ICON_URL,
				responseType: 'blob',
				timeout: 10000,
				onload: (resp) => {
					try {
						const reader = new FileReader();
						reader.onloadend = () => {
							if (reader.result) ICON_URI = reader.result;
							resolve();
						};
						reader.onerror = () => resolve();
						reader.readAsDataURL(resp.response);
					} catch {
						resolve();
					}
				},
				onerror: () => resolve(),
				ontimeout: () => resolve(),
			});
		});
	}

	// 下载小图标
	const DL_SVG = '<svg viewBox="0 0 24 24"><path d="M19 9h-4V3H9v6H5l7 7 7-7zM5 18v2h14v-2H5z"/></svg>';

	// GitHub 常见可下载位置配置
	const INJECT_SCENARIOS = {
		'release-zip': {
			label: 'Release ZIP/Tar',
			desc: 'Release 页面的源码压缩包',
			defaultOn: true
		},
		'release-asset': {
			label: 'Release 附件',
			desc: 'Release 页面的上传附件',
			defaultOn: true
		},
		'raw-file': {
			label: 'Raw 原始文件',
			desc: '代码文件查看页的原始文件',
			defaultOn: true
		},
		'clone-zip': {
			label: 'Clone 弹框 ZIP',
			desc: '仓库主页 Clone 弹框的 ZIP 下载',
			defaultOn: true
		},
		'repo-archive': {
			label: '仓库 Code 按钮',
			desc: '仓库主页 Code 按钮旁',
			defaultOn: true
		},
		'lfs-file': {
			label: 'LFS 大文件',
			desc: 'Git LFS 管理的大文件',
			defaultOn: true
		},
		'gist-raw': {
			label: 'Gist 原始文件',
			desc: 'Gist 代码片段的原始文件',
			defaultOn: true
		},
		'compare-diff': {
			label: 'Compare/Diff 补丁',
			desc: '代码比较页面的 Patch/Diff',
			defaultOn: true
		},
	};

	// ===== 状态 =====
	let allNodes = [];
	let visibleKeys = [];
	let panelOpen = false;
	let injectConfig = {};

	// ===== Storage 封装 (GM API) =====
	function gmGet(keys) {
		const result = {};
		if (typeof keys === 'string') keys = [keys];
		for (const k of keys) {
			try {
				result[k] = GM_getValue(k);
			} catch {
				result[k] = undefined;
			}
		}
		return result;
	}

	function gmSet(obj) {
		for (const [k, v] of Object.entries(obj)) {
			try {
				GM_setValue(k, v);
			} catch (e) {
				console.error('[SuperGit] GM_setValue error:', e);
			}
		}
	}

	// ===== 跨域请求 (GM_xmlhttpRequest) =====
	function gmFetch(url, options = {}) {
		return new Promise((resolve, reject) => {
			GM_xmlhttpRequest({
				method: options.method || 'GET',
				url: url,
				headers: options.headers || {},
				responseType: options.responseType || 'json',
				timeout: options.timeout || 30000,
				onload: (resp) => {
					if (resp.status >= 200 && resp.status < 400) {
						resolve(resp);
					} else {
						reject(new Error(`HTTP ${resp.status}`));
					}
				},
				onerror: (err) => reject(err),
				ontimeout: () => reject(new Error('Timeout')),
			});
		});
	}

	// ===== 加载镜像节点 (原 background.js loadMirrorNodes) =====
	async function loadMirrorNodes() {
		try {
			console.log('[SuperGit] 正在加载镜像节点...');
			const resp = await gmFetch('https://api.akams.cn/github');

			if (resp.status >= 200 && resp.status < 400) {
				const data = typeof resp.response === 'string' ? JSON.parse(resp.response) : resp.response;

				if (data.code === 200 && data.data && Array.isArray(data.data)) {
					allNodes = data.data
						.filter(node => node.latency > 0 && node.latency < 1500)
						.sort((a, b) => a.latency - b.latency);

					console.log(`[SuperGit] 加载了 ${allNodes.length} 个镜像节点`);
					gmSet({
						mirrorNodes: allNodes,
						sg_nodes_update_time: Date.now()
					});
					return;
				} else {
					throw new Error('API返回数据格式错误');
				}
			} else {
				throw new Error(`HTTP错误`);
			}
		} catch (error) {
			console.error('[SuperGit] 加载镜像节点失败:', error);
			allNodes = [{
				url: 'https://bgithub.xyz',
				name: '默认镜像',
				latency: 100
			}];
			gmSet({
				mirrorNodes: allNodes
			});
		}
	}

	// ===== 初始化 =====
	async function init() {
		// 优先从 GM storage 加载缓存
		const store = gmGet(['mirrorNodes', 'sg_visible_keys', 'sg_inject_config', 'sg_nodes_update_time']);

		if (store.mirrorNodes && Array.isArray(store.mirrorNodes) && store.mirrorNodes.length > 0) {
			allNodes = store.mirrorNodes;
			console.log('[SuperGit] 从本地存储加载镜像节点:', allNodes.length);
		}

		visibleKeys = store.sg_visible_keys || [];
		if (!visibleKeys.length && allNodes.length) {
			visibleKeys = allNodes.slice(0, 10).map(n => nodeKey(n));
			saveVisibleKeys();
		}

		// 加载注入配置
		injectConfig = store.sg_inject_config || {};
		Object.keys(INJECT_SCENARIOS).forEach(k => {
			if (injectConfig[k] === undefined) {
				injectConfig[k] = INJECT_SCENARIOS[k].defaultOn;
			}
		});
		saveInjectConfig();

		// 缓存过期则刷新
		const lastUpdate = store.sg_nodes_update_time || 0;
		if (Date.now() - lastUpdate > 10 * 60 * 1000 || !allNodes.length) {
			console.log('[SuperGit] 节点数据已过期或为空，立即刷新');
			await loadMirrorNodes();
		}

		// 定期刷新 (每10分钟)
		setInterval(loadMirrorNodes, 10 * 60 * 1000);

		// 预加载图标（绕过 GitHub CSP）
		await preloadIcon();

		injectUI();
		bindEvents();
		refreshNodeList();
		setupInject();

		// 兜底：节点为空时自动刷新一次
		if (!allNodes.length) autoRefreshNodes();

		// 注册油猴菜单命令
		GM_registerMenuCommand('打开节点管理面板', () => {
			if (!panelOpen) togglePanel();
		});
	}

	// ===== 工具函数 =====
	function nodeKey(node) {
		return node.url || '';
	}

	function shortDomain(url) {
		try {
			const h = new URL(url).hostname.replace('www.', '');
			const parts = h.split('.');
			return parts.length > 2 ? parts.slice(-2).join('.') : h;
		} catch {
			return url;
		}
	}

	function delayClass(ms) {
		return ms < 300 ? 'sg-delay-fast' : ms < 800 ? 'sg-delay-medium' : 'sg-delay-slow';
	}

	function dmDelayClass(ms) {
		return ms < 300 ? 'sg-dm-fast' : ms < 800 ? 'sg-dm-medium' : 'sg-dm-slow';
	}

	function delayPercent(ms) {
		return Math.min(100, (ms / 1500) * 100);
	}

	function saveVisibleKeys() {
		gmSet({
			sg_visible_keys: visibleKeys
		});
	}

	function saveInjectConfig() {
		gmSet({
			sg_inject_config: injectConfig
		});
	}

	// 生成镜像链接
	function mirrorUrl(githubUrl, nodeUrl) {
		let url = githubUrl;
		if (url.includes('bgithub.xyz')) {
			url = url.replace('bgithub.xyz', 'github.com').replace('raw.bgithub.xyz', 'raw.githubusercontent.com');
		}
		if (nodeUrl.endsWith('/')) nodeUrl = nodeUrl.slice(0, -1);
		return `${nodeUrl}/${url}`;
	}

	// 兜底：节点为空时自动刷新一次
	let _autoRefreshing = false;

	function autoRefreshNodes(onDone) {
		if (_autoRefreshing || allNodes.length > 0) {
			onDone?.();
			return;
		}
		_autoRefreshing = true;
		console.log('[SuperGit] 节点列表为空，自动刷新...');
		loadMirrorNodes().then(() => {
			_autoRefreshing = false;
			if (allNodes.length) {
				visibleKeys = visibleKeys.filter(k => allNodes.some(n => nodeKey(n) === k));
				if (!visibleKeys.length) visibleKeys = allNodes.slice(0, 10).map(n => nodeKey(n));
				saveVisibleKeys();
				refreshNodeList();
				showToast(`自动刷新成功，${allNodes.length} 个节点`);
			} else {
				showToast('自动刷新失败，请手动刷新');
			}
			onDone?.();
		}).catch(() => {
			_autoRefreshing = false;
			showToast('自动刷新失败，请手动刷新');
			onDone?.();
		});
	}

	function showToast(msg) {
		const t = document.createElement('div');
		t.className = 'sg-toast';
		t.textContent = msg;
		document.body.appendChild(t);
		requestAnimationFrame(() => t.classList.add('sg-show'));
		setTimeout(() => {
			t.classList.remove('sg-show');
			setTimeout(() => t.remove(), 300);
		}, 2000);
	}

	// ===== 注入 CSS =====
	GM_addStyle(`
/* SuperGit 右下角浮动按钮 */
#supergit-fab {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 2147483647;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #2da44e;
    color: #fff;
    font-size: 22px;
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.3);
    transition: all 0.2s ease;
    line-height: 1;
}
#supergit-fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}
#supergit-fab:active {
    transform: scale(0.95);
}
#supergit-fab svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}

/* 脉冲动画 - 有节点时绿色脉冲 */
@keyframes sg-pulse {
    0%   { box-shadow: 0 0 0 0 rgba(45, 164, 78, 0.5); }
    70%  { box-shadow: 0 0 0 10px rgba(45, 164, 78, 0); }
    100% { box-shadow: 0 0 0 0 rgba(45, 164, 78, 0); }
}
#supergit-fab.sg-pulse {
    animation: sg-pulse 2s infinite;
}

/* 面板遮罩 */
#supergit-overlay {
    position: fixed;
    inset: 0;
    z-index: 2147483646;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}
#supergit-overlay.sg-visible {
    opacity: 1;
    pointer-events: auto;
}

/* 管理面板 */
#supergit-panel {
    position: fixed;
    bottom: 84px;
    right: 24px;
    z-index: 2147483647;
    width: 380px;
    max-height: 520px;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 12px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
    color: #e6edf3;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 14px;
    overflow: hidden;
    transform: translateY(20px) scale(0.95);
    opacity: 0;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    display: flex;
    flex-direction: column;
}
#supergit-panel.sg-visible {
    transform: translateY(0) scale(1);
    opacity: 1;
    pointer-events: auto;
}

/* 面板头部 */
.sg-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px 12px;
    border-bottom: 1px solid #21262d;
    flex-shrink: 0;
}
.sg-panel-header h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #e6edf3;
}
.sg-panel-header h3 svg {
    width: 20px;
    height: 20px;
    fill: #2da44e;
}
.sg-close-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: #8b949e;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}
.sg-close-btn:hover {
    background: #21262d;
    color: #e6edf3;
}

/* 状态栏 */
.sg-status-bar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 20px;
    font-size: 12px;
    color: #8b949e;
    border-bottom: 1px solid #21262d;
}
.sg-status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}
.sg-status-dot.sg-online { background: #2da44e; }
.sg-status-dot.sg-offline { background: #6e7681; }
.sg-status-bar .sg-last-update {
    margin-left: auto;
}

/* 工具栏 */
.sg-toolbar {
    display: flex;
    gap: 8px;
    padding: 12px 20px;
    border-bottom: 1px solid #21262d;
}
.sg-toolbar-btn {
    padding: 6px 12px;
    border: 1px solid #30363d;
    border-radius: 6px;
    background: #21262d;
    color: #e6edf3;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: all 0.15s;
    white-space: nowrap;
}
.sg-toolbar-btn:hover {
    background: #30363d;
    border-color: #8b949e;
}
.sg-toolbar-btn svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
}
.sg-toolbar-btn.sg-loading {
    opacity: 0.6;
    pointer-events: none;
}
.sg-toolbar-btn svg.sg-spin {
    animation: sg-spin 1s linear infinite;
}
@keyframes sg-spin {
    to { transform: rotate(360deg); }
}

/* 节点列表 */
.sg-node-list {
    max-height: 280px;
    overflow-y: auto;
    padding: 8px 0;
    flex: 1;
}
.sg-node-list::-webkit-scrollbar {
    width: 6px;
}
.sg-node-list::-webkit-scrollbar-thumb {
    background: #30363d;
    border-radius: 3px;
}
.sg-node-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 20px;
    transition: background 0.15s;
}
.sg-node-item:hover {
    background: #161b22;
}

/* 自定义 Checkbox */
.sg-checkbox {
    position: relative;
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    cursor: pointer;
}
.sg-checkbox input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    margin: 0;
}
.sg-checkbox .sg-checkmark {
    width: 16px;
    height: 16px;
    border: 1.5px solid #30363d;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    background: #0d1117;
}
.sg-checkbox input:checked + .sg-checkmark {
    background: #2da44e;
    border-color: #2da44e;
}
.sg-checkbox input:checked + .sg-checkmark::after {
    content: '';
    width: 4px;
    height: 8px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg) translate(-0.5px, -0.5px);
}

.sg-node-info {
    flex: 1;
    min-width: 0;
}
.sg-node-domain {
    font-size: 13px;
    font-weight: 500;
    color: #e6edf3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sg-node-delay {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 2px;
}
.sg-delay-bar {
    height: 3px;
    border-radius: 2px;
    background: #21262d;
    flex: 1;
    max-width: 60px;
    overflow: hidden;
}
.sg-delay-bar-fill {
    height: 100%;
    border-radius: 2px;
    transition: width 0.3s ease;
}
.sg-delay-text {
    font-size: 11px;
    color: #8b949e;
}

/* 延迟颜色等级 */
.sg-delay-fast { color: #2da44e; }
.sg-delay-fast .sg-delay-bar-fill { background: #2da44e; }
.sg-delay-medium { color: #d29922; }
.sg-delay-medium .sg-delay-bar-fill { background: #d29922; }
.sg-delay-slow { color: #f85149; }
.sg-delay-slow .sg-delay-bar-fill { background: #f85149; }

.sg-node-actions {
    flex-shrink: 0;
}
.sg-test-btn {
    padding: 4px 8px;
    border: 1px solid #30363d;
    border-radius: 4px;
    background: transparent;
    color: #8b949e;
    font-size: 11px;
    cursor: pointer;
    transition: all 0.15s;
}
.sg-test-btn:hover {
    background: #21262d;
    color: #e6edf3;
    border-color: #8b949e;
}

/* 空状态 */
.sg-empty {
    padding: 32px 20px;
    text-align: center;
    color: #8b949e;
    font-size: 13px;
}

/* 提示消息 */
.sg-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    z-index: 2147483648;
    background: #1f6feb;
    color: #fff;
    padding: 8px 20px;
    border-radius: 6px;
    font-size: 13px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    opacity: 0;
    transition: all 0.25s ease;
    pointer-events: none;
    white-space: nowrap;
}
.sg-toast.sg-show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* ===== 注入下载按钮（绿色文字按钮） ===== */
.sg-dl-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 8px;
    border: 1px solid #2da44e;
    border-radius: 5px;
    background: transparent;
    color: #2da44e;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    vertical-align: middle;
    margin-left: 6px;
    transition: all 0.15s;
    flex-shrink: 0;
    white-space: nowrap;
    line-height: 1.4;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
}
.sg-dl-btn:hover {
    background: #2da44e;
    color: #fff;
}
.sg-dl-btn svg {
    width: 12px;
    height: 12px;
    fill: currentColor;
    flex-shrink: 0;
}

/* ===== 下载弹窗 ===== */
#sg-download-modal {
    position: fixed;
    inset: 0;
    z-index: 2147483648;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}
#sg-download-modal.sg-visible {
    opacity: 1;
    pointer-events: auto;
}
#sg-dm-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
}
#sg-dm-card {
    position: relative;
    width: 400px;
    max-height: 480px;
    background: #0d1117;
    border: 1px solid #30363d;
    border-radius: 12px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    transform: translateY(12px) scale(0.97);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: hidden;
}
#sg-download-modal.sg-visible #sg-dm-card {
    transform: translateY(0) scale(1);
}

/* 弹窗头部 */
.sg-dm-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid #21262d;
    flex-shrink: 0;
}
.sg-dm-header h4 {
    margin: 0;
    font-size: 14px;
    font-weight: 600;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sg-dm-header h4 img, .sg-dm-header h4 .sg-dm-icon {
    width: 16px;
    height: 16px;
}
.sg-dm-refresh-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: #8b949e;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
}
.sg-dm-refresh-btn:hover {
    background: #21262d;
    color: #e6edf3;
}
.sg-dm-refresh-btn svg {
    width: 14px;
    height: 14px;
    fill: currentColor;
    transition: transform 0.3s;
}
.sg-dm-refresh-btn.sg-spin svg {
    animation: sg-spin 1s linear infinite;
}

/* 弹窗文件信息 */
.sg-dm-fileinfo {
    padding: 10px 18px;
    background: #161b22;
    border-bottom: 1px solid #21262d;
    font-size: 12px;
    color: #8b949e;
    flex-shrink: 0;
}
.sg-dm-fileinfo .sg-dm-filename {
    color: #e6edf3;
    font-weight: 500;
    font-size: 13px;
    word-break: break-all;
}

/* 弹窗节点列表 */
.sg-dm-nodelist {
    flex: 1;
    overflow-y: auto;
    padding: 6px 0;
}
.sg-dm-nodelist::-webkit-scrollbar {
    width: 6px;
}
.sg-dm-nodelist::-webkit-scrollbar-thumb {
    background: #30363d;
    border-radius: 3px;
}
.sg-dm-node-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 18px;
    transition: background 0.12s;
}
.sg-dm-node-item:hover {
    background: #161b22;
}
.sg-dm-domain {
    flex: 1;
    font-size: 13px;
    color: #e6edf3;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.sg-dm-node-delay {
    font-size: 11px;
    color: #8b949e;
    white-space: nowrap;
    min-width: 40px;
    text-align: right;
}
.sg-dm-node-delay.sg-dm-fast { color: #2da44e; }
.sg-dm-node-delay.sg-dm-medium { color: #d29922; }
.sg-dm-node-delay.sg-dm-slow { color: #f85149; }

.sg-dm-download-btn {
    padding: 4px 12px;
    border: 1px solid #2da44e;
    border-radius: 5px;
    background: transparent;
    color: #2da44e;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}
.sg-dm-download-btn:hover {
    background: #2da44e;
    color: #fff;
}

/* ===== 管理面板 Tab ===== */
.sg-tabs {
    display: flex;
    border-bottom: 1px solid #21262d;
    flex-shrink: 0;
}
.sg-tab {
    flex: 1;
    padding: 10px 0;
    text-align: center;
    font-size: 13px;
    color: #8b949e;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.15s;
    background: none;
    border-top: none;
    border-left: none;
    border-right: none;
}
.sg-tab:hover {
    color: #e6edf3;
    background: #161b22;
}
.sg-tab.sg-active {
    color: #e6edf3;
    border-bottom-color: #2da44e;
}

.sg-tab-content {
    display: none;
    overflow-y: auto;
    flex: 1;
}
.sg-tab-content.sg-active {
    display: flex;
    flex-direction: column;
}

/* 注入设置区域 */
.sg-inject-setting {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid #21262d;
    font-size: 13px;
}
.sg-inject-setting:last-child {
    border-bottom: none;
}
.sg-inject-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.sg-inject-label .sg-label-title {
    color: #e6edf3;
    font-weight: 500;
}
.sg-inject-label .sg-label-desc {
    color: #6e7681;
    font-size: 11px;
}

/* ===== 开关（增强样式） ===== */
.sg-toggle {
    position: relative;
    width: 40px;
    height: 22px;
    cursor: pointer;
    display: inline-block;
    flex-shrink: 0;
}
.sg-toggle input {
    position: absolute;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    margin: 0;
    z-index: 1;
}
.sg-toggle .sg-toggle-track {
    width: 40px;
    height: 22px;
    border-radius: 11px;
    background: #30363d;
    transition: background 0.25s;
    position: relative;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.3);
}
.sg-toggle input:checked + .sg-toggle-track {
    background: #2da44e;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2), 0 0 0 2px rgba(45, 164, 78, 0.2);
}
.sg-toggle .sg-toggle-track::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: #fff;
    top: 3px;
    left: 3px;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}
.sg-toggle input:checked + .sg-toggle-track::after {
    transform: translateX(18px);
}
/* 开关状态文字 */
.sg-toggle-status {
    font-size: 11px;
    margin-left: 6px;
    flex-shrink: 0;
}
.sg-toggle-status.sg-on {
    color: #2da44e;
}
.sg-toggle-status.sg-off {
    color: #6e7681;
}

/* ===== 底部 footer ===== */
.sg-footer {
    padding: 8px 16px;
    border-top: 1px solid #21262d;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 11px;
    color: #484f58;
    flex-shrink: 0;
    background: #010409;
}
.sg-footer a {
    color: #8b949e;
    text-decoration: none;
    transition: color 0.15s;
}
.sg-footer a:hover {
    color: #58a6ff;
}
`);

	// ===== 注入 UI =====
	function injectUI() {
		// 浮动按钮
		const fab = document.createElement('button');
		fab.id = 'supergit-fab';
		fab.title = 'SuperGit镜像节点管理';
		const fabImg = document.createElement('img');
		fabImg.src = ICON_URI;
		fabImg.alt = 'SuperGit';
		fabImg.style.cssText = 'width:32px;height:32px;';
		fab.appendChild(fabImg);
		document.body.appendChild(fab);

		// 遮罩
		const overlay = document.createElement('div');
		overlay.id = 'supergit-overlay';
		document.body.appendChild(overlay);

		// 管理面板
		const panel = document.createElement('div');
		panel.id = 'supergit-panel';
		panel.innerHTML = buildPanelHTML();
		document.body.appendChild(panel);

		if (allNodes.length > 0) fab.classList.add('sg-pulse');

		// 下载弹窗
		const modal = document.createElement('div');
		modal.id = 'sg-download-modal';
		modal.innerHTML = buildModalHTML();
		document.body.appendChild(modal);
	}

	function buildPanelHTML() {
		const scenariosHTML = Object.entries(INJECT_SCENARIOS).map(([key, cfg]) => {
			const checked = injectConfig[key] ? 'checked' : '';
			const statusClass = injectConfig[key] ? 'sg-on' : 'sg-off';
			const statusText = injectConfig[key] ? '已开启' : '已关闭';
			return `
                <div class="sg-inject-setting">
                    <div class="sg-inject-label">
                        <span class="sg-label-title">${cfg.label}</span>
                        <span class="sg-label-desc">${cfg.desc}</span>
                    </div>
                    <div style="display:flex;align-items:center;">
                        <label class="sg-toggle">
                            <input type="checkbox" class="sg-inject-cb" data-key="${key}" ${checked}>
                            <span class="sg-toggle-track"></span>
                        </label>
                        <span class="sg-toggle-status ${statusClass}" data-status-for="${key}">${statusText}</span>
                    </div>
                </div>`;
		}).join('');

		return `
            <div class="sg-panel-header">
                <h3><img src="${ICON_URI}" style="width:20px;height:20px;"> SuperGit镜像节点管理</h3>
                <button class="sg-close-btn" id="sg-close-btn">
                    <svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor"><path d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"/></svg>
                </button>
            </div>
            <div class="sg-tabs">
                <button class="sg-tab sg-active" data-tab="nodes">节点管理</button>
                <button class="sg-tab" data-tab="inject">下载按钮</button>
            </div>
            <!-- Tab: 节点管理 -->
            <div class="sg-tab-content sg-active" id="sg-tab-nodes">
                <div class="sg-status-bar">
                    <span class="sg-status-dot" id="sg-dot"></span>
                    <span id="sg-status-text">加载中...</span>
                    <span class="sg-last-update" id="sg-last-update"></span>
                </div>
                <div class="sg-toolbar">
                    <button class="sg-toolbar-btn" id="sg-refresh-btn">
                        <svg viewBox="0 0 24 24"><path d="M17.65 6.35A7.958 7.958 0 0012 4c-4.42 0-7.99 3.58-7.99 8s3.57 8 7.99 8c3.73 0 6.84-2.55 7.73-6h-2.08A5.99 5.99 0 0112 18c-3.31 0-6-2.69-6-6s2.69-6 6-6c1.66 0 3.14.69 4.22 1.78L13 11h7V4l-2.35 2.35z"/></svg>
                        <span>刷新节点</span>
                    </button>
                    <button class="sg-toolbar-btn" id="sg-select-all-btn">全选</button>
                    <button class="sg-toolbar-btn" id="sg-deselect-all-btn">全不选</button>
                    <button class="sg-toolbar-btn" id="sg-top10-btn">默认 Top10</button>
                </div>
                <div class="sg-node-list" id="sg-node-list"></div>
            </div>
            <!-- Tab: 下载按钮配置 -->
            <div class="sg-tab-content" id="sg-tab-inject">
                <div style="padding:10px 20px 6px;font-size:12px;color:#8b949e;border-bottom:1px solid #21262d;">
                    管理各位置下载按钮的显示，关闭后需刷新页面生效。
                </div>
                ${scenariosHTML}
            </div>
            <div class="sg-footer">
                <span>${VERSION}</span>
                <a href="https://hsya.top/" target="_blank" rel="noopener">划水鸭</a>
            </div>`;
	}

	function buildModalHTML() {
		return `
            <div id="sg-dm-overlay"></div>
            <div id="sg-dm-card">
                <div class="sg-dm-header">
                    <h4><img src="${ICON_URI}"> 镜像加速下载</h4>
                    <div style="display:flex;align-items:center;gap:6px;">
                        <button class="sg-dm-refresh-btn" id="sg-dm-refresh-btn" title="刷新节点">
                            <svg width="14" height="14" viewBox="0 0 24 24"><path d="M17.65 6.35A7.958 7.958 0 0012 4c-4.42 0-7.99 3.58-7.99 8s3.57 8 7.99 8c3.73 0 6.84-2.55 7.73-6h-2.08A5.99 5.99 0 0112 18c-3.31 0-6-2.69-6-6s2.69-6 6-6c1.66 0 3.14.69 4.22 1.78L13 11h7V4l-2.35 2.35z"/></svg>
                        </button>
                        <button class="sg-close-btn" id="sg-dm-close">
                            <svg width="16" height="16" viewBox="0 0 16 16" fill="currentColor"><path d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"/></svg>
                        </button>
                    </div>
                </div>
                <div class="sg-dm-fileinfo">
                    <div style="margin-bottom:4px;">下载文件</div>
                    <div class="sg-dm-filename" id="sg-dm-filename">-</div>
                </div>
                <div class="sg-dm-nodelist" id="sg-dm-nodelist"></div>
                <div class="sg-footer">
                    <span>${VERSION}</span>
                    <a href="https://hsya.top/" target="_blank" rel="noopener">划水鸭</a>
                </div>
            </div>`;
	}

	// ===== 面板切换 =====
	function togglePanel() {
		const panel = document.getElementById('supergit-panel');
		const overlay = document.getElementById('supergit-overlay');
		const fab = document.getElementById('supergit-fab');
		panelOpen = !panelOpen;
		fab.classList.remove('sg-pulse');
		panel.classList.toggle('sg-visible', panelOpen);
		overlay.classList.toggle('sg-visible', panelOpen);
		if (panelOpen) refreshNodeList();
	}

	// ===== 绑定事件 =====
	function bindEvents() {
		const fab = document.getElementById('supergit-fab');
		const overlay = document.getElementById('supergit-overlay');

		fab.addEventListener('click', togglePanel);
		overlay.addEventListener('click', togglePanel);
		document.getElementById('sg-close-btn').addEventListener('click', togglePanel);

		// Tab 切换
		const panel = document.getElementById('supergit-panel');
		panel.querySelectorAll('.sg-tab').forEach(tab => {
			tab.addEventListener('click', () => {
				panel.querySelectorAll('.sg-tab').forEach(t => t.classList.remove('sg-active'));
				panel.querySelectorAll('.sg-tab-content').forEach(c => c.classList.remove(
					'sg-active'));
				tab.classList.add('sg-active');
				document.getElementById('sg-tab-' + tab.dataset.tab).classList.add('sg-active');
			});
		});

		// 注入配置 checkbox
		panel.querySelectorAll('.sg-inject-cb').forEach(cb => {
			cb.addEventListener('change', () => {
				const key = cb.dataset.key;
				injectConfig[key] = cb.checked;
				saveInjectConfig();
				const statusEl = document.querySelector(`[data-status-for="${key}"]`);
				if (statusEl) {
					statusEl.textContent = cb.checked ? '已开启' : '已关闭';
					statusEl.className = 'sg-toggle-status ' + (cb.checked ? 'sg-on' : 'sg-off');
				}
				showToast(cb.checked ? '已开启，刷新页面后生效' : '已关闭，刷新页面后生效');
			});
		});

		// 刷新节点
		document.getElementById('sg-refresh-btn').addEventListener('click', refreshNodes);

		// 全选 / 全不选 / 默认 Top10
		document.getElementById('sg-select-all-btn').addEventListener('click', () => {
			visibleKeys = allNodes.map(n => nodeKey(n));
			saveVisibleKeys();
			refreshNodeList();
			showToast('已全选所有节点');
		});
		document.getElementById('sg-deselect-all-btn').addEventListener('click', () => {
			visibleKeys = [];
			saveVisibleKeys();
			refreshNodeList();
			showToast('已取消所有节点');
		});
		document.getElementById('sg-top10-btn').addEventListener('click', () => {
			visibleKeys = allNodes.slice(0, 10).map(n => nodeKey(n));
			saveVisibleKeys();
			refreshNodeList();
			showToast('已恢复默认 Top10 节点');
		});

		// 节点列表委托
		document.getElementById('sg-node-list').addEventListener('change', (e) => {
			if (!e.target.classList.contains('sg-node-cb')) return;
			const key = e.target.dataset.key;
			if (e.target.checked) {
				if (!visibleKeys.includes(key)) visibleKeys.push(key);
			} else {
				visibleKeys = visibleKeys.filter(k => k !== key);
			}
			saveVisibleKeys();
		});
		document.getElementById('sg-node-list').addEventListener('click', (e) => {
			const btn = e.target.closest('.sg-test-btn');
			if (btn) testNode(btn.dataset.url, btn);
		});

		// 下载弹窗事件
		const modal = document.getElementById('sg-download-modal');
		document.getElementById('sg-dm-close').addEventListener('click', () => modal.classList.remove(
			'sg-visible'));
		document.getElementById('sg-dm-overlay').addEventListener('click', () => modal.classList.remove(
			'sg-visible'));

		// 弹窗刷新按钮
		document.getElementById('sg-dm-refresh-btn').addEventListener('click', () => {
			const refreshEl = document.getElementById('sg-dm-refresh-btn');
			refreshEl.classList.add('sg-spin');
			loadMirrorNodes().then(() => {
				// 获取当前弹窗中的 githubUrl 并重新渲染
				const firstBtn = document.querySelector('.sg-dm-download-btn');
				const ghUrl = firstBtn ? firstBtn.dataset.ghUrl : '';
				renderModalNodeList(ghUrl);
				refreshEl.classList.remove('sg-spin');
				showToast('节点已刷新');
			}).catch(() => {
				refreshEl.classList.remove('sg-spin');
				showToast('刷新失败');
			});
		});

		document.getElementById('sg-dm-nodelist').addEventListener('click', (e) => {
			const btn = e.target.closest('.sg-dm-download-btn');
			if (!btn) return;
			const ghUrl = btn.dataset.ghUrl;
			const nodeUrl = btn.dataset.nodeUrl;
			const url = mirrorUrl(ghUrl, nodeUrl);
			downloadViaMirror(url);
			showToast('开始下载...');
			modal.classList.remove('sg-visible');
		});
	}

	// ===== 下载 (GM_download + GM_openInTab 降级) =====
	function downloadViaMirror(url) {
		const filename = url.split('/').pop() || 'download';
		try {
			GM_download({
				url: url,
				name: filename,
				saveAs: false,
				onerror: (err) => {
					console.error('[SuperGit] GM_download 失败，使用新标签页:', err);
					GM_openInTab(url, {
						active: false,
						insert: true
					});
				}
			});
		} catch (e) {
			GM_openInTab(url, {
				active: false,
				insert: true
			});
		}
	}

	// ===== 打开下载弹窗 =====
	function openDownloadModal(githubUrl, filename) {
		const modal = document.getElementById('sg-download-modal');
		document.getElementById('sg-dm-filename').textContent = filename || githubUrl;

		const visibleNodes = visibleKeys.length ? allNodes.filter(n => visibleKeys.includes(nodeKey(n))) : allNodes
			.slice(0, 10);
		const listEl = document.getElementById('sg-dm-nodelist');

		if (!visibleNodes.length) {
			listEl.innerHTML =
				'<div class="sg-empty">暂无可用节点<br>正在自动刷新...<br><small style="color:#484f58;margin-top:4px;">也可点击右上角刷新按钮</small></div>';
			if (!_autoRefreshing) {
				autoRefreshNodes(() => {
					renderModalNodeList(githubUrl);
				});
			}
		} else {
			renderModalNodeList(githubUrl);
		}

		modal.classList.add('sg-visible');
	}

	function renderModalNodeList(githubUrl) {
		const listEl = document.getElementById('sg-dm-nodelist');
		const visibleNodes = visibleKeys.length ? allNodes.filter(n => visibleKeys.includes(nodeKey(n))) : allNodes
			.slice(0, 10);

		if (!visibleNodes.length) {
			listEl.innerHTML =
				'<div class="sg-empty">暂无可用节点<br><small style="color:#484f58;margin-top:4px;">点击右上角刷新按钮重试</small></div>';
			return;
		}
		listEl.innerHTML = visibleNodes.map(node => {
			const lat = node.latency || 0;
			const cls = dmDelayClass(lat);
			return `
                <div class="sg-dm-node-item">
                    <span class="sg-dm-domain" title="${node.url}">${shortDomain(node.url)}</span>
                    <span class="sg-dm-node-delay ${cls}">${lat}ms</span>
                    <button class="sg-dm-download-btn" data-gh-url="${githubUrl}" data-node-url="${node.url}">下载</button>
                </div>`;
		}).join('');
	}

	// ===== 注入下载按钮到 GitHub 页面 =====
	let injectTimer = null;

	function setupInject() {
		const anyEnabled = Object.values(injectConfig).some(v => v);
		if (!anyEnabled) return;

		scheduleInject();

		// GitHub 是 SPA，监听路由变化重新注入
		let lastUrl = location.href;
		const observer = new MutationObserver((mutations) => {
			if (location.href !== lastUrl) {
				lastUrl = location.href;
				scheduleInject(800);
			} else {
				const hasRelevant = mutations.some(m => {
					const target = m.target;
					if (target.closest?.(
							'details, .dropdown-menu, .js-menu-container, [data-view-component]'))
						return true;
					for (const node of m.addedNodes) {
						if (node.nodeType !== 1) continue;
						const html = (node.outerHTML || node.textContent || '').toLowerCase();
						if (html.includes('download') || html.includes('release') || html.includes(
								'archive') || html.includes('raw') || html.includes('codeload'))
							return true;
					}
					return false;
				});
				if (hasRelevant) scheduleInject(300);
			}
		});
		observer.observe(document.body, {
			childList: true,
			subtree: true
		});

		setInterval(() => scheduleInject(), 5000);
	}

	function scheduleInject(delay) {
		clearTimeout(injectTimer);
		injectTimer = setTimeout(injectDownloadButtons, delay || 500);
	}

	function createDlBtn(githubUrl, filename) {
		const btn = document.createElement('button');
		btn.className = 'sg-dl-btn';
		btn.title = '镜像下载';
		btn.dataset.sgDlUrl = githubUrl;
		btn.setAttribute('aria-label', '镜像下载');
		btn.innerHTML = DL_SVG + '镜像下载';
		btn.addEventListener('click', (e) => {
			e.preventDefault();
			e.stopPropagation();
			openDownloadModal(githubUrl, filename || '');
		});
		return btn;
	}

	function tryInject(container, link, filename) {
		if (!container || container.querySelector('.sg-dl-btn')) return;
		if (!link || !link.href) return;
		const href = link.href;
		if (!href.includes('github.com') && !href.includes('githubusercontent.com') && !href.includes(
				'codeload.github.com')) return;
		const fname = filename || link.textContent.trim() || href.split('/').pop();
		container.appendChild(createDlBtn(href, fname));
	}

	function injectDownloadButtons() {
		const host = location.hostname;

		// ===== 1. Release 源码压缩包 =====
		if (injectConfig['release-zip']) {
			document.querySelectorAll(
				'a[href*="codeload.github.com"], a[href*="/archive/refs/"], a[href*="/zipball/"], a[href*="/tarball/"]'
			).forEach(link => {
				if (link.closest('.sg-dl-btn')) return;
				const parent = link.closest('li, .Box-row, div, tr, .liststyle-none') || link.parentElement;
				tryInject(parent, link, link.textContent.trim() || 'Source code');
			});
			document.querySelectorAll('section[class*="release"], .release, [data-test-id="release-body"]').forEach(
				section => {
					section.querySelectorAll('a[href*="/archive/"]').forEach(link => {
						const parent = link.closest('li, .Box-row, div') || link.parentElement;
						tryInject(parent, link);
					});
				});
		}

		// ===== 2. Release 附件 =====
		if (injectConfig['release-asset']) {
			document.querySelectorAll('a[href*="/releases/download/"]').forEach(link => {
				if (link.closest('.sg-dl-btn')) return;
				const row = link.closest('.Box-row, li, tr, div');
				if (row) tryInject(row, link);
				else tryInject(link.parentElement, link);
			});
			document.querySelectorAll('a[href*="/releases/expanded_assets/"]').forEach(link => {
				const row = link.closest('li, .Box-row, div');
				if (row) tryInject(row, link);
			});
		}

		// ===== 3. Raw 原始文件 =====
		if (injectConfig['raw-file']) {
			document.querySelectorAll('#raw-url, a[id="raw-url"]').forEach(link => {
				tryInject(link.parentElement, link);
			});
			document.querySelectorAll(
				'.js-blob-dropdown-content a[href*="raw"], .btn-group a[href*="/raw/"], a[href*="/raw/"][href*="githubusercontent.com"]'
			).forEach(link => {
				tryInject(link.parentElement, link);
			});
			document.querySelectorAll('a[role="menuitem"][href*="/raw/"], a[data-ga-click*="raw"]').forEach(
				link => {
					tryInject(link.parentElement, link);
				});
		}

		// ===== 4. Clone 弹框 Download ZIP =====
		if (injectConfig['clone-zip']) {
			document.querySelectorAll('details a[href*="codeload.github.com"], details a[href*="/archive/refs/"]')
				.forEach(link => {
					const details = link.closest('details');
					if (!details) return;
					const isClone = details.querySelector('[class*="clone"], input[value*="git clone"]');
					if (!isClone) return;
					const li = link.closest('li') || link.parentElement;
					tryInject(li, link, 'Download ZIP');
				});
			document.querySelectorAll('[data-view-component] a[href*="codeload.github.com"]').forEach(link => {
				const container = link.closest('[data-view-component]');
				if (!container) return;
				const li = link.closest('li, div') || link.parentElement;
				tryInject(li, link, 'Download ZIP');
			});
		}

		// ===== 5. 仓库主页 Code 按钮 =====
		if (injectConfig['repo-archive']) {
			document.querySelectorAll(
				'details[data-view-component] a[href*="codeload.github.com"], details[data-view-component] a[href*="/archive/refs/"]'
			).forEach(link => {
				const li = link.closest('li, .liststyle-none, div') || link.parentElement;
				tryInject(li, link, 'Source code');
			});
			document.querySelectorAll('a[data-ga-click*="download"]').forEach(link => {
				const li = link.closest('li') || link.parentElement;
				tryInject(li, link, 'Source code');
			});
		}

		// ===== 6. LFS 大文件 =====
		if (injectConfig['lfs-file']) {
			document.querySelectorAll('a[href*="/info/lfs/objects/"], .lfs-object').forEach(link => {
				const parent = link.closest('li, div, tr, .Box-row') || link.parentElement;
				tryInject(parent, link);
			});
			document.querySelectorAll('table a[href*="lfs"]').forEach(link => {
				const tr = link.closest('tr');
				if (tr) tryInject(tr, link);
			});
		}

		// ===== 7. Gist 原始文件 =====
		if (host === 'gist.github.com' && injectConfig['gist-raw']) {
			document.querySelectorAll('.gist a[href*="/raw/"], .gist .btn[href*="raw"]').forEach(link => {
				tryInject(link.parentElement, link);
			});
		}

		// ===== 8. Compare/Diff 补丁下载 =====
		if (injectConfig['compare-diff']) {
			document.querySelectorAll('a[href*=".patch"], a[href*=".diff"]').forEach(link => {
				const parent = link.closest('li, div, .Box-row, .dropdown-item') || link.parentElement;
				tryInject(parent, link, link.textContent.trim() || 'Patch');
			});
		}

		// ===== 通用兜底 =====
		document.querySelectorAll('a[download][href*="github"]').forEach(link => {
			const parent = link.closest('li, div, .Box-row, tr') || link.parentElement;
			tryInject(parent, link);
		});
	}

	// ===== 刷新节点 =====
	async function refreshNodes() {
		const btn = document.getElementById('sg-refresh-btn');
		btn.classList.add('sg-loading');
		btn.querySelector('svg').classList.add('sg-spin');
		await loadMirrorNodes();
		const validKeys = new Set(allNodes.map(n => nodeKey(n)));
		visibleKeys = visibleKeys.filter(k => validKeys.has(k));
		if (!visibleKeys.length && allNodes.length) visibleKeys = allNodes.slice(0, 10).map(n => nodeKey(n));
		saveVisibleKeys();
		refreshNodeList();
		btn.classList.remove('sg-loading');
		btn.querySelector('svg').classList.remove('sg-spin');
		showToast(`已刷新，共 ${allNodes.length} 个节点`);
	}

	// ===== 渲染节点列表 =====
	function refreshNodeList() {
		const listEl = document.getElementById('sg-node-list');
		const statusDot = document.getElementById('sg-dot');
		const statusText = document.getElementById('sg-status-text');

		if (allNodes.length > 0) {
			statusDot.className = 'sg-status-dot sg-online';
			const lats = allNodes.map(n => n.latency || 0);
			statusText.textContent =
				`${allNodes.length} 个节点 · 最低 ${Math.min(...lats)}ms · 平均 ${Math.round(lats.reduce((a, b) => a + b, 0) / lats.length)}ms`;
		} else {
			statusDot.className = 'sg-status-dot sg-offline';
			statusText.textContent = '暂无可用节点，正在自动刷新...';
		}
		document.getElementById('sg-last-update').textContent = new Date().toLocaleTimeString('zh-CN', {
			hour: '2-digit',
			minute: '2-digit'
		});

		if (!allNodes.length) {
			listEl.innerHTML = '<div class="sg-empty">暂无可用镜像节点<br>正在自动刷新...</div>';
			if (!_autoRefreshing) autoRefreshNodes();
			return;
		}
		listEl.innerHTML = allNodes.map(node => {
			const key = nodeKey(node);
			const checked = visibleKeys.includes(key) ? 'checked' : '';
			const lat = node.latency || 0;
			const cls = delayClass(lat);
			return `
                <div class="sg-node-item">
                    <label class="sg-checkbox">
                        <input type="checkbox" class="sg-node-cb" data-key="${key}" ${checked}>
                        <span class="sg-checkmark"></span>
                    </label>
                    <div class="sg-node-info">
                        <div class="sg-node-domain" title="${node.url}">${shortDomain(node.url)}</div>
                        <div class="sg-node-delay ${cls}">
                            <div class="sg-delay-bar"><div class="sg-delay-bar-fill" style="width:${delayPercent(lat)}%"></div></div>
                            <span class="sg-delay-text">${lat}ms</span>
                        </div>
                    </div>
                    <div class="sg-node-actions">
                        <button class="sg-test-btn" data-url="${node.url}">测速</button>
                    </div>
                </div>`;
		}).join('');
	}

	// ===== 单节点测速 =====
	function testNode(url, btnEl) {
		const orig = btnEl.textContent;
		btnEl.textContent = '...';
		btnEl.disabled = true;
		const start = performance.now();
		GM_xmlhttpRequest({
			method: 'HEAD',
			url: url,
			timeout: 5000,
			onload: () => {
				const ms = Math.round(performance.now() - start);
				btnEl.textContent = ms + 'ms';
				btnEl.style.color = '#2da44e';
				btnEl.style.borderColor = '#2da44e';
			},
			onerror: () => {
				btnEl.textContent = '超时';
				btnEl.style.color = '#f85149';
				btnEl.style.borderColor = '#f85149';
			},
			ontimeout: () => {
				btnEl.textContent = '超时';
				btnEl.style.color = '#f85149';
				btnEl.style.borderColor = '#f85149';
			},
			onfinally: () => {
				setTimeout(() => {
					btnEl.textContent = orig;
					btnEl.style.color = '';
					btnEl.style.borderColor = '';
					btnEl.disabled = false;
				}, 3000);
			}
		});
	}

	init();
})();