/* ============================================================================
 * style.css — 漏洞猴·从0到专家  全站样式
 * 暗色黑客/终端风：深色背景 + 霓虹绿/青色点缀。响应式。
 * 只用系统字体与等宽字体栈，不依赖任何外部 CDN，file:// 直接可用。
 * ========================================================================== */

:root {
  --bg: #0a0e0a;              /* 主背景（近黑带一点绿调） */
  --bg-2: #0f1510;           /* 次级背景 */
  --panel: #111a12;          /* 卡片/面板背景 */
  --panel-2: #16221a;        /* 卡片悬停/次级面板 */
  --border: #1f3324;         /* 边框 */
  --border-glow: #2bd46a;    /* 高亮边框 */
  --green: #39ff87;          /* 霓虹绿主色 */
  --cyan: #2ee6d6;           /* 青色点缀 */
  --green-dim: #1f8a4c;      /* 暗绿 */
  --text: #d6ffe4;           /* 主文字（偏绿白） */
  --text-dim: #7fa98c;       /* 次级文字 */
  --text-mute: #557a63;      /* 更弱文字 */
  --warn: #ffcb2b;           /* 警告黄 */
  --danger: #ff5c5c;         /* 危险红 */
  --radius: 10px;
  --mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", "Consolas",
          "Liberation Mono", "Menlo", "Courier New", monospace;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
          "Noto Sans CJK SC", "Source Han Sans CN", system-ui, -apple-system,
          "Segoe UI", Roboto, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* 背景网格纹理（纯 CSS，无图片） */
body {
  background-image:
    linear-gradient(rgba(43, 212, 106, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 212, 106, 0.035) 1px, transparent 1px);
  background-size: 32px 32px;
  background-attachment: fixed;
  min-height: 100vh;
}

a { color: var(--cyan); text-decoration: none; }
a:hover { color: var(--green); text-decoration: underline; }

code, kbd, pre { font-family: var(--mono); }

.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }

/* ---------- 顶部站点栏 ---------- */
.site-header {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(17,26,18,0.9), rgba(10,14,10,0.6));
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(6px);
}
.site-header .inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; padding: 14px 20px; max-width: 1120px; margin: 0 auto;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--mono); }
.brand .logo {
  font-size: 1.5rem; filter: drop-shadow(0 0 6px var(--green));
}
.brand .name { font-weight: 700; color: var(--green); letter-spacing: 0.5px; }
.brand .name .caret { color: var(--cyan); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }
.nav-links a { color: var(--text-dim); margin-left: 18px; font-size: 0.9rem; }
.nav-links a:hover { color: var(--green); }

/* ---------- Hero / 标题区 ---------- */
.hero { padding: 48px 0 24px; text-align: center; }
.hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem); margin: 0 0 10px;
  font-family: var(--mono); font-weight: 800; letter-spacing: 1px;
  color: var(--green);
  text-shadow: 0 0 18px rgba(57, 255, 135, 0.35);
}
.hero h1 .accent { color: var(--cyan); }
.hero .slogan { color: var(--text-dim); font-size: 1.05rem; margin: 0 auto 28px; max-width: 640px; }
.hero .prompt { color: var(--text-mute); font-family: var(--mono); font-size: 0.85rem; }

/* ---------- 总进度条 ---------- */
.progress-wrap { max-width: 640px; margin: 0 auto 8px; }
.progress-top {
  display: flex; justify-content: space-between; align-items: baseline;
  font-family: var(--mono); font-size: 0.85rem; color: var(--text-dim); margin-bottom: 6px;
}
.progress-top .pct { color: var(--green); font-weight: 700; font-size: 1.05rem; }
.progress-bar {
  height: 14px; background: var(--bg-2); border: 1px solid var(--border);
  border-radius: 999px; overflow: hidden; position: relative;
}
.progress-bar .fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--green-dim), var(--green), var(--cyan));
  box-shadow: 0 0 12px rgba(57,255,135,0.6);
  transition: width 0.6s ease;
}
.progress-sub { font-family: var(--mono); font-size: 0.78rem; color: var(--text-mute); margin-top: 6px; text-align: center; }

/* ---------- 布局：主内容 + 侧栏 ---------- */
.layout { display: grid; grid-template-columns: 1fr 300px; gap: 28px; padding: 32px 0 64px; }
@media (max-width: 900px) { .layout { grid-template-columns: 1fr; } }

/* ---------- Roadmap 竖向时间线 ---------- */
.roadmap { position: relative; }
.roadmap::before {
  content: ""; position: absolute; left: 26px; top: 10px; bottom: 10px;
  width: 2px; background: linear-gradient(180deg, var(--green-dim), var(--border));
}
@media (max-width: 560px) { .roadmap::before { left: 18px; } }

.stage { position: relative; padding-left: 68px; margin-bottom: 20px; }
@media (max-width: 560px) { .stage { padding-left: 52px; } }

.stage .node {
  position: absolute; left: 8px; top: 16px; width: 38px; height: 38px;
  border-radius: 50%; background: var(--panel); border: 2px solid var(--green-dim);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-weight: 700; color: var(--green);
  box-shadow: 0 0 0 4px var(--bg);
  z-index: 2;
}
@media (max-width: 560px) { .stage .node { left: 0; width: 36px; height: 36px; } }
.stage.done .node { background: var(--green); color: #04120a; border-color: var(--green); box-shadow: 0 0 14px var(--green), 0 0 0 4px var(--bg); }
.stage.partial .node { border-color: var(--cyan); color: var(--cyan); }

.stage-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: border-color 0.2s, transform 0.1s;
}
.stage-card:hover { border-color: var(--green-dim); }

.stage-head {
  display: flex; align-items: center; gap: 14px; padding: 16px 18px; cursor: pointer;
  user-select: none;
}
.stage-head .titles { flex: 1; min-width: 0; }
.stage-head .stage-no { font-family: var(--mono); color: var(--cyan); font-size: 0.78rem; letter-spacing: 1px; }
.stage-head h3 { margin: 2px 0 4px; font-size: 1.12rem; color: var(--text); }
.stage-head .intro { margin: 0; color: var(--text-dim); font-size: 0.86rem; }
.stage-head .meta { display: flex; flex-direction: column; align-items: flex-end; gap: 6px; min-width: 120px; }
.stage-head .count { font-family: var(--mono); font-size: 0.75rem; color: var(--text-mute); }
.stage-head .toggle { color: var(--text-mute); font-family: var(--mono); transition: transform 0.2s; }
.stage.open .stage-head .toggle { transform: rotate(90deg); }

/* 徽章 pill */
.badge-pill {
  font-family: var(--mono); font-size: 0.72rem; padding: 3px 10px; border-radius: 999px;
  border: 1px solid var(--border); color: var(--text-mute); white-space: nowrap;
  display: inline-flex; align-items: center; gap: 5px;
}
.badge-pill.unlocked { border-color: var(--green); color: var(--green); background: rgba(57,255,135,0.08); box-shadow: 0 0 10px rgba(57,255,135,0.2); }

/* 阶段内小进度条 */
.mini-bar { height: 6px; width: 110px; background: var(--bg-2); border-radius: 999px; overflow: hidden; border: 1px solid var(--border); }
.mini-bar .fill { height: 100%; background: linear-gradient(90deg, var(--green), var(--cyan)); width: 0%; transition: width 0.5s; }

/* 阶段展开的知识点列表 */
.topics { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; border-top: 0 solid var(--border); }
.stage.open .topics { max-height: 1600px; border-top: 1px solid var(--border); }
.topic-list { list-style: none; margin: 0; padding: 6px; display: grid; grid-template-columns: 1fr 1fr; gap: 6px; }
@media (max-width: 680px) { .topic-list { grid-template-columns: 1fr; } }
.topic-item a {
  display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px;
  color: var(--text); text-decoration: none; border: 1px solid transparent; transition: all 0.15s;
}
.topic-item a:hover { background: var(--panel-2); border-color: var(--green-dim); text-decoration: none; }
.topic-item .check {
  width: 18px; height: 18px; border-radius: 4px; border: 1px solid var(--border);
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  font-size: 0.7rem; color: var(--green);
}
.topic-item.done .check { background: var(--green); color: #04120a; border-color: var(--green); }
.topic-item .t-name { flex: 1; font-size: 0.9rem; }
.topic-item .t-type { font-family: var(--mono); font-size: 0.64rem; padding: 2px 6px; border-radius: 4px; border: 1px solid var(--border); color: var(--text-mute); }
.topic-item .t-type.vuln { color: var(--warn); border-color: rgba(255,203,43,0.3); }

/* ---------- 侧栏 ---------- */
.side-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px; margin-bottom: 20px;
}
.side-card h4 {
  margin: 0 0 12px; font-size: 0.82rem; font-family: var(--mono); letter-spacing: 1px;
  color: var(--cyan); text-transform: uppercase;
  display: flex; align-items: center; justify-content: space-between;
}
.tag-demo { font-family: var(--mono); font-size: 0.6rem; color: var(--warn); border: 1px solid rgba(255,203,43,0.3); padding: 1px 6px; border-radius: 4px; }

/* 排行榜 */
.rank-list { list-style: none; margin: 0; padding: 0; }
.rank-list li { display: flex; align-items: center; gap: 10px; padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: 0.86rem; }
.rank-list li:last-child { border-bottom: none; }
.rank-list .pos { font-family: var(--mono); color: var(--text-mute); width: 22px; }
.rank-list .pos.top { color: var(--green); }
.rank-list .who { flex: 1; color: var(--text-dim); }
.rank-list .score { font-family: var(--mono); color: var(--green); }

/* 徽章墙 */
.badge-wall { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.badge-wall .b {
  aspect-ratio: 1; border: 1px solid var(--border); border-radius: 10px; background: var(--bg-2);
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px;
  text-align: center; padding: 6px; opacity: 0.45; transition: all 0.2s;
}
.badge-wall .b.on { opacity: 1; border-color: var(--green); box-shadow: 0 0 12px rgba(57,255,135,0.25); }
.badge-wall .b .ico { font-size: 1.3rem; filter: grayscale(1); }
.badge-wall .b.on .ico { filter: none; }
.badge-wall .b .lbl { font-size: 0.6rem; color: var(--text-mute); line-height: 1.2; }
.badge-wall .b.on .lbl { color: var(--green); }

/* 更新日志 */
.changelog { list-style: none; margin: 0; padding: 0; font-size: 0.82rem; }
.changelog li { padding: 6px 0; border-bottom: 1px dashed var(--border); color: var(--text-dim); }
.changelog li:last-child { border-bottom: none; }
.changelog .date { font-family: var(--mono); color: var(--text-mute); font-size: 0.72rem; margin-right: 8px; }

/* ---------- 合规提示条 ---------- */
.compliance {
  border: 1px solid rgba(255,92,92,0.35); background: rgba(255,92,92,0.06);
  border-radius: var(--radius); padding: 14px 18px; margin: 10px 0 40px;
  color: #ffd5d5; font-size: 0.85rem; display: flex; gap: 12px; align-items: flex-start;
}
.compliance .ico { font-size: 1.2rem; }
.compliance b { color: var(--danger); }

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; color: var(--text-mute); font-size: 0.82rem; }
.site-footer .inner { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; align-items: center; }
.site-footer a { color: var(--text-dim); }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-family: var(--mono); font-size: 0.86rem; padding: 10px 18px; border-radius: 8px;
  border: 1px solid var(--green-dim); background: var(--panel); color: var(--green);
  transition: all 0.15s; text-decoration: none;
}
.btn:hover { background: var(--green); color: #04120a; text-decoration: none; box-shadow: 0 0 14px rgba(57,255,135,0.4); }
.btn.ghost { border-color: var(--border); color: var(--text-dim); }
.btn.ghost:hover { border-color: var(--green-dim); background: var(--panel-2); color: var(--green); box-shadow: none; }
.btn.done-state { background: var(--green); color: #04120a; }

/* ============================================================================
 * topic.html 专用样式
 * ========================================================================== */
.breadcrumb { font-family: var(--mono); font-size: 0.82rem; color: var(--text-mute); padding: 20px 0 8px; }
.breadcrumb a { color: var(--text-dim); }
.breadcrumb .sep { margin: 0 8px; color: var(--border-glow); }

.topic-header { padding: 8px 0 20px; border-bottom: 1px solid var(--border); margin-bottom: 8px; }
.topic-header .eyebrow { font-family: var(--mono); font-size: 0.78rem; color: var(--cyan); letter-spacing: 1px; }
.topic-header h1 { margin: 6px 0 8px; font-size: clamp(1.5rem, 4vw, 2.2rem); color: var(--green); font-family: var(--mono); }
.topic-header .sub { color: var(--text-dim); margin: 0; }
.topic-header .type-badge { display: inline-block; margin-top: 10px; font-family: var(--mono); font-size: 0.72rem; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--warn); color: var(--warn); }

/* Tab 切换 */
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 24px 0 20px; border-bottom: 1px solid var(--border); }
.tab-btn {
  font-family: var(--mono); font-size: 0.9rem; padding: 12px 18px; cursor: pointer;
  background: none; border: none; border-bottom: 2px solid transparent; color: var(--text-dim);
  transition: all 0.15s; position: relative; top: 1px;
}
.tab-btn:hover { color: var(--green); }
.tab-btn.active { color: var(--green); border-bottom-color: var(--green); text-shadow: 0 0 8px rgba(57,255,135,0.4); }
.tab-btn .num { color: var(--text-mute); margin-right: 6px; }
.tab-panel { display: none; animation: fade 0.25s ease; }
.tab-panel.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* 文档式讲解 */
.doc h2 { font-size: 1.2rem; color: var(--cyan); margin: 26px 0 10px; font-family: var(--mono); display: flex; align-items: center; gap: 8px; }
.doc h2::before { content: "#"; color: var(--green-dim); }
.doc h3 { font-size: 1.02rem; color: var(--green); margin: 18px 0 8px; font-family: var(--mono); }
.doc p { color: var(--text-dim); }
.doc ul, .doc ol { color: var(--text-dim); padding-left: 1.3em; margin: 8px 0 14px; }
.doc li { margin: 4px 0; }
.doc code { font-family: var(--mono); font-size: 0.86em; color: var(--green); background: #060a07; padding: 1px 6px; border-radius: 4px; }
.doc pre.code-block { white-space: pre-wrap; word-break: break-word; }
.doc blockquote { margin: 10px 0 16px; padding: 10px 14px; border-left: 3px solid var(--green-dim); background: var(--bg-2); color: var(--text-dim); }
.doc table { width: 100%; border-collapse: collapse; margin: 10px 0 16px; font-size: 0.88rem; }
.doc th, .doc td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; color: var(--text-dim); vertical-align: top; }
.doc th { color: var(--text); background: var(--panel-2); font-family: var(--mono); font-size: 0.8rem; }
.placeholder {
  border: 1px dashed var(--border); border-radius: 8px; padding: 14px 16px; margin: 8px 0;
  background: var(--bg-2); color: var(--text-mute); font-size: 0.88rem;
}
.todo-tag { font-family: var(--mono); font-size: 0.66rem; color: var(--warn); border: 1px solid rgba(255,203,43,0.4); background: rgba(255,203,43,0.08); padding: 2px 8px; border-radius: 4px; margin-right: 8px; }

/* 练习场景 */
.lab-box { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; margin: 14px 0; }
.lab-box .lab-name { font-family: var(--mono); color: var(--green); font-size: 1rem; }
.code-block {
  background: #060a07; border: 1px solid var(--border); border-radius: 8px; padding: 14px 16px;
  font-family: var(--mono); font-size: 0.85rem; color: var(--text); overflow-x: auto; margin: 10px 0;
  white-space: pre; position: relative;
}
.code-block .cmt { color: var(--text-mute); }
.code-block .dim { color: var(--text-mute); }

/* 考试四级卡片 */
.levels { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin: 16px 0; }
@media (max-width: 640px) { .levels { grid-template-columns: 1fr; } }
.level-card {
  background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px;
  display: flex; flex-direction: column; gap: 10px;
}
.level-card .lv-head { display: flex; align-items: center; justify-content: space-between; }
.level-card .lv-no { font-family: var(--mono); font-size: 0.72rem; color: var(--cyan); letter-spacing: 1px; }
.level-card h3 { margin: 0; font-size: 1rem; color: var(--text); }
.level-card .lv-desc { color: var(--text-dim); font-size: 0.84rem; margin: 0; flex: 1; }
.level-card .lv-diff { font-family: var(--mono); font-size: 0.68rem; }
.diff-1 { color: var(--green); } .diff-2 { color: var(--cyan); } .diff-3 { color: var(--warn); } .diff-4 { color: var(--danger); }

.status-pill { font-family: var(--mono); font-size: 0.68rem; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--border); color: var(--text-mute); }
.status-pill.todo { color: var(--text-mute); }
.status-pill.doing { color: var(--cyan); border-color: var(--cyan); }
.status-pill.pass { color: var(--green); border-color: var(--green); background: rgba(57,255,135,0.1); }

.flag-row { display: flex; gap: 8px; }
.flag-row input {
  flex: 1; background: #060a07; border: 1px solid var(--border); border-radius: 6px;
  color: var(--text); font-family: var(--mono); font-size: 0.82rem; padding: 8px 10px;
}
.flag-row input:focus { outline: none; border-color: var(--green-dim); box-shadow: 0 0 8px rgba(57,255,135,0.2); }
.flag-row button {
  font-family: var(--mono); font-size: 0.8rem; padding: 0 14px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--green-dim); background: var(--panel); color: var(--green); transition: all 0.15s;
}
.flag-row button:hover { background: var(--green); color: #04120a; }
.flag-hint { font-size: 0.72rem; color: var(--text-mute); font-family: var(--mono); min-height: 1em; }
.flag-hint.ok { color: var(--green); }
.flag-hint.err { color: var(--danger); }

/* 掌握徽章横幅 */
.mastery {
  display: flex; align-items: center; gap: 14px; padding: 16px 18px; border-radius: var(--radius);
  border: 1px dashed var(--border); background: var(--bg-2); margin: 18px 0; color: var(--text-mute);
}
.mastery.on { border: 1px solid var(--green); background: rgba(57,255,135,0.08); color: var(--green); box-shadow: 0 0 16px rgba(57,255,135,0.2); }
.mastery .m-ico { font-size: 1.8rem; filter: grayscale(1); }
.mastery.on .m-ico { filter: none; }

/* 底部完成按钮区 */
.topic-foot { border-top: 1px solid var(--border); margin-top: 32px; padding: 24px 0 60px; display: flex; flex-wrap: wrap; gap: 14px; align-items: center; justify-content: space-between; }
.topic-foot .hint { color: var(--text-mute); font-size: 0.82rem; font-family: var(--mono); }

/* 工具类 */
.muted { color: var(--text-mute); }
.mono { font-family: var(--mono); }
.nowrap { white-space: nowrap; }

/* ===== 站内嵌入靶场 ===== */
.lab-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: flex-start;
  flex-wrap: wrap;
  margin-bottom: 12px;
}
.lab-actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.lab-actions select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  font-family: var(--mono);
  min-width: 180px;
}
.lab-frame-wrap {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: #0a0f0a;
  min-height: 70vh;
}
.lab-frame-wrap iframe {
  display: block;
  width: 100%;
  height: 70vh;
  border: 0;
  background: #fff;
}
.lab-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-family: var(--mono);
  padding: 24px;
  text-align: center;
}
.exam-lab { margin-top: 16px; }
.level-card .flag-row { flex-wrap: wrap; }
.labs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
  margin: 18px 0 40px;
}
.lab-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.lab-card h3 { margin: 0; color: var(--cyan); font-family: var(--mono); font-size: 1rem; }
.lab-card p { margin: 0; color: var(--muted); font-size: 0.85rem; flex: 1; }
.lab-card .btn { align-self: flex-start; }