/* ============ AI 冒险学院 · 深色游戏风 ============ */
:root {
  --bg: #0b0f1a;
  --bg2: #111827;
  --card: #151d2e;
  --card2: #1b2438;
  --line: #26324b;
  --txt: #e2e8f0;
  --sub: #94a3b8;
  --cyan: #67e8f9;
  --purple: #a78bfa;
  --amber: #fbbf24;
  --green: #4ade80;
  --red: #f87171;
  --pink: #f472b6;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background:
    radial-gradient(1200px 500px at 80% -10%, rgba(139, 92, 246, .14), transparent 60%),
    radial-gradient(900px 420px at 10% 15%, rgba(103, 232, 249, .10), transparent 60%),
    var(--bg);
  color: var(--txt);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", system-ui, sans-serif;
  line-height: 1.65;
}

::selection { background: rgba(103, 232, 249, .35); }
a { color: var(--cyan); text-decoration: none; }
.hidden { display: none !important; }
b { color: #fff; }
code {
  background: #0d1424; border: 1px solid var(--line); border-radius: 6px;
  padding: 1px 6px; font-size: .9em; color: var(--cyan);
  font-family: Consolas, "JetBrains Mono", monospace;
}

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11, 15, 26, .82); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1150px; margin: 0 auto; padding: 10px 16px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.brand { font-weight: 800; font-size: 18px; color: #fff; white-space: nowrap; }
.xp-wrap { display: flex; align-items: center; gap: 8px; }
.xp-bar {
  width: 140px; height: 10px; border-radius: 99px;
  background: #0d1424; border: 1px solid var(--line); overflow: hidden;
}
.xp-fill {
  height: 100%; width: 0%; border-radius: 99px;
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--pink));
  background-size: 200% 100%; animation: shimmer 3s linear infinite;
  transition: width .6s ease;
}
@keyframes shimmer { to { background-position: -200% 0; } }
.xp-text { font-size: 12px; color: var(--sub); white-space: nowrap; }
.nav { display: flex; gap: 2px; overflow-x: auto; margin-left: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a {
  color: var(--sub); font-size: 13px; padding: 6px 10px; border-radius: 10px;
  white-space: nowrap; transition: .2s;
}
.nav a:hover, .nav a.active { color: #fff; background: rgba(103, 232, 249, .12); }

/* ---------- HERO ---------- */
.hero { max-width: 1150px; margin: 0 auto; padding: 70px 16px 40px; }
.hero-grid { display: grid; grid-template-columns: 1.3fr 1fr; gap: 30px; align-items: center; }
.hero-kicker {
  display: inline-block; color: var(--cyan); border: 1px solid rgba(103,232,249,.4);
  padding: 4px 14px; border-radius: 99px; font-size: 13px; margin-bottom: 16px;
  background: rgba(103,232,249,.08);
}
.hero h1 { font-size: clamp(38px, 6vw, 64px); line-height: 1.15; letter-spacing: 1px; }
.grad {
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--pink));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-sub { margin: 18px 0 26px; color: var(--sub); font-size: 17px; max-width: 560px; }
.hero-cta { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block; cursor: pointer; border: none; font-family: inherit;
  font-size: 15px; font-weight: 700; padding: 12px 22px; border-radius: 14px;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn:active { transform: scale(.96); }
.btn-primary {
  background: linear-gradient(90deg, #4f8cff, #8b5cf6); color: #fff;
  box-shadow: 0 6px 20px rgba(99, 102, 241, .4);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 26px rgba(99,102,241,.55); }
.btn-ghost { background: transparent; color: var(--cyan); border: 1.5px solid rgba(103,232,249,.5); }
.btn-ghost:hover { background: rgba(103,232,249,.1); }
.btn-small { background: var(--card2); color: var(--txt); border: 1px solid var(--line); font-weight: 600; padding: 8px 16px; font-size: 13px; }
.btn-small:hover { border-color: var(--cyan); color: var(--cyan); }

.hero-art { text-align: center; }
.robot { width: min(300px, 70vw); animation: floaty 4s ease-in-out infinite; filter: drop-shadow(0 14px 30px rgba(79,140,255,.35)); }
@keyframes floaty { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }
.blink { animation: blink 2.4s ease-in-out infinite; }
@keyframes blink { 0%,100% { opacity: 1; } 50% { opacity: .25; } }
.eye { animation: blink 5s ease-in-out infinite; }
.hero-tip { color: var(--sub); font-size: 13px; margin-top: 6px; }
.hero-tokens { margin-top: 26px; display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  padding: 5px 13px; border-radius: 99px; font-size: 13px; font-weight: 700;
  animation: floaty 3.4s ease-in-out infinite;
}
.c1 { background: rgba(79,140,255,.16); color: #93b4ff; border: 1px solid rgba(79,140,255,.4); animation-delay: 0s; }
.c2 { background: rgba(251,146,60,.14); color: #fdba74; border: 1px solid rgba(251,146,60,.4); animation-delay: .4s; }
.c3 { background: rgba(103,232,249,.12); color: var(--cyan); border: 1px solid rgba(103,232,249,.4); animation-delay: .8s; }
.c4 { background: rgba(251,191,36,.12); color: var(--amber); border: 1px solid rgba(251,191,36,.4); animation-delay: 1.2s; }
.c5 { background: rgba(167,139,250,.14); color: var(--purple); border: 1px solid rgba(167,139,250,.4); animation-delay: 1.6s; }
.c6 { background: rgba(244,114,182,.13); color: var(--pink); border: 1px solid rgba(244,114,182,.4); animation-delay: 2s; }

/* ---------- 章节骨架 ---------- */
.sec { max-width: 1150px; margin: 0 auto; padding: 64px 16px 30px; scroll-margin-top: 90px; }
.sec-head { margin-bottom: 26px; }
.sec-no {
  display: inline-block; font-size: 12px; font-weight: 800; letter-spacing: 2px;
  color: var(--amber); border: 1px dashed rgba(251,191,36,.5);
  padding: 3px 12px; border-radius: 99px; margin-bottom: 10px;
  background: rgba(251,191,36,.06);
}
.sec h2 { font-size: clamp(24px, 3.4vw, 36px); margin-bottom: 10px; }
.sec-intro { color: var(--sub); max-width: 780px; font-size: 16px; }
.flow-svg-wrap { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; margin: 20px 0; }
.flow-svg-wrap svg { width: 100%; height: auto; display: block; }

.tldr {
  margin-top: 26px; padding: 16px 20px; border-radius: var(--radius);
  background: linear-gradient(90deg, rgba(103,232,249,.09), rgba(167,139,250,.09));
  border: 1px solid rgba(103, 232, 249, .3); font-size: 15px;
}

/* ---------- SEC0 术语卡 ---------- */
.term-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 14px; margin: 10px 0 16px; }
.term-card {
  background: var(--card); border: 1.5px solid var(--line); border-radius: var(--radius);
  padding: 18px 14px; text-align: center; cursor: pointer; transition: .2s; user-select: none;
}
.term-card:hover { transform: translateY(-4px); border-color: var(--cyan); box-shadow: var(--shadow); }
.term-card.on { border-color: var(--cyan); background: rgba(103,232,249,.08); }
.term-card .t-ico { font-size: 34px; display: block; margin-bottom: 8px; }
.term-card .t-name { font-weight: 800; font-size: 16px; }
.term-card .t-en { color: var(--sub); font-size: 12px; }
.term-detail {
  background: var(--card2); border: 1px solid var(--line); border-left: 4px solid var(--purple);
  border-radius: 12px; padding: 16px 20px; color: var(--txt); min-height: 60px; font-size: 15px;
}

/* ---------- 游戏卡通用 ---------- */
.game-card {
  margin: 30px 0 10px; background: var(--card); border: 1.5px solid var(--line);
  border-radius: var(--radius); padding: 22px; position: relative; overflow: hidden;
}
.game-card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--pink));
}
.game-card h3 { font-size: 20px; margin-bottom: 8px; }
.game-desc { color: var(--sub); font-size: 14px; margin-bottom: 16px; }
.game-desc code { color: var(--amber); }
.game-status { margin-top: 14px; font-size: 15px; font-weight: 700; min-height: 24px; }
.game-status.win { color: var(--green); }
.game-status.lose { color: var(--red); }
.game-status.info { color: var(--amber); }

/* 配对游戏 */
.match-board { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 14px; }
.match-btn {
  background: var(--card2); border: 1.5px solid var(--line); color: var(--txt);
  border-radius: 12px; padding: 10px 14px; text-align: left; cursor: pointer;
  font-size: 14px; font-family: inherit; transition: .18s;
}
.match-btn:hover { border-color: var(--cyan); }
.match-btn.sel { border-color: var(--amber); background: rgba(251,191,36,.12); }
.match-btn.ok { border-color: var(--green); background: rgba(74,222,128,.13); color: var(--green); cursor: default; }
.match-btn.bad { animation: shake .35s; border-color: var(--red); }
@keyframes shake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-6px)} 75%{transform:translateX(6px)} }

/* 真假鉴定 */
.tf-list { display: grid; gap: 10px; margin-bottom: 16px; }
.tf-item {
  background: var(--card2); border: 1.5px solid var(--line); border-radius: 12px;
  padding: 12px 16px; cursor: pointer; transition: .18s; font-size: 15px; user-select: none;
}
.tf-item:hover { border-color: var(--cyan); }
.tf-item.picked { border-color: var(--amber); background: rgba(251,191,36,.1); }
.tf-item.right { border-color: var(--green); }
.tf-item.wrong { border-color: var(--red); }
.tf-item .verdict { float: right; font-weight: 800; }
.verdict.vt { color: var(--green); } .verdict.vf { color: var(--red); }

/* 维度卡 */
.dim-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin-bottom: 20px; }
.dim-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; transition: .2s; }
.dim-card:hover { border-color: var(--purple); transform: translateY(-3px); }
.dim-ico { font-size: 30px; }
.dim-card h4 { margin: 8px 0 6px; font-size: 16px; }
.dim-card p { color: var(--sub); font-size: 14px; }
.bench-box {
  background: var(--card2); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px 22px; margin-bottom: 10px;
}
.bench-box h3 { margin-bottom: 10px; font-size: 17px; }
.bench-box ol { padding-left: 22px; color: var(--sub); font-size: 14.5px; display: grid; gap: 6px; }

/* 选型机器 */
.picker-needs { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.need-chip {
  cursor: pointer; user-select: none; font-size: 14px; font-weight: 600;
  border: 1.5px solid var(--line); background: var(--card2); color: var(--txt);
  padding: 8px 15px; border-radius: 99px; transition: .18s;
}
.need-chip:hover { border-color: var(--cyan); }
.need-chip.on { background: rgba(103,232,249,.14); border-color: var(--cyan); color: var(--cyan); }
.picker-result {
  background: var(--card2); border: 1px dashed var(--line); border-radius: 12px;
  padding: 14px 18px; font-size: 15px; min-height: 52px;
}

/* 门派卡 */
.faction-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.faction {
  background: var(--card); border-radius: var(--radius); padding: 20px;
  border: 1.5px solid var(--line); position: relative;
}
.faction.openai { border-color: rgba(79,140,255,.55); box-shadow: 0 0 40px rgba(79,140,255,.08) inset; }
.faction.anthropic { border-color: rgba(251,146,60,.55); box-shadow: 0 0 40px rgba(251,146,60,.08) inset; }
.faction header { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.fac-emoji { font-size: 34px; }
.faction h3 { font-size: 22px; }
.faction header p { color: var(--sub); font-size: 12.5px; }
.fac-list { list-style: none; display: grid; gap: 9px; font-size: 14.5px; }
.fac-flavor { margin-top: 12px; font-size: 13px; color: var(--amber); font-style: italic; }
.vs-note { margin-top: 18px; background: var(--card2); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 20px; display: grid; gap: 6px; font-size: 14.5px; }
.version-note { color: var(--amber); font-size: 13px; }

/* Token */
.token-facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin-bottom: 22px; }
.fact { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; font-size: 14.5px; }
.fact b { display: block; margin-bottom: 6px; }
.fact p { color: var(--sub); }
.glass-demo { text-align: center; margin: 10px 0 6px; }
.glass {
  display: flex; flex-direction: column; gap: 4px; margin: 0 auto; max-width: 560px;
  background: rgba(103,232,249,.05); border: 2px solid rgba(103,232,249,.4);
  border-radius: 12px 12px 26px 26px; padding: 12px; min-height: 120px;
}
.glass-block { border-radius: 8px; padding: 8px 10px; font-size: 13px; font-weight: 700; animation: pulse 3s ease-in-out infinite; }
@keyframes pulse { 0%,100%{opacity:.85} 50%{opacity:1} }
.b1 { background: rgba(167,139,250,.25); border: 1px solid var(--purple); width: 100%; }
.b2 { background: rgba(103,232,249,.2); border: 1px solid var(--cyan); width: 92%; margin: 0 auto; }
.b3 { background: rgba(251,191,36,.2); border: 1px solid var(--amber); width: 70%; margin: 0 auto; }
.b4 { background: rgba(74,222,128,.18); border: 1px solid var(--green); width: 46%; margin: 0 auto; }
.glass-cap { color: var(--sub); font-size: 13px; margin-top: 10px; }
#tokenInput {
  width: 100%; background: #0d1424; color: var(--txt); border: 1.5px solid var(--line);
  border-radius: 12px; padding: 12px 14px; font-size: 15px; font-family: inherit; margin-bottom: 14px;
}
#tokenInput:focus { outline: none; border-color: var(--cyan); }
.token-chips { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 12px; min-height: 30px; }
.tk {
  font-size: 13px; padding: 2px 7px; border-radius: 6px; font-family: Consolas, monospace;
  animation: popin .18s ease; white-space: pre;
}
@keyframes popin { from { transform: scale(.5); opacity: 0; } to { transform: scale(1); opacity: 1; } }
.tk-k { background: rgba(167,139,250,.22); color: #c4b5fd; border: 1px solid rgba(167,139,250,.5); }
.tk-e { background: rgba(103,232,249,.16); color: var(--cyan); border: 1px solid rgba(103,232,249,.45); }
.tk-p { background: rgba(251,191,36,.16); color: var(--amber); border: 1px solid rgba(251,191,36,.45); }
.tk-n { background: rgba(74,222,128,.16); color: var(--green); border: 1px solid rgba(74,222,128,.45); }
.token-stats { color: var(--sub); font-size: 14px; display: flex; gap: 20px; flex-wrap: wrap; }
.token-stats b { color: var(--amber); font-size: 18px; }
.mt-row { margin-bottom: 12px; font-size: 14.5px; }
.mt-row label { display: block; margin-bottom: 4px; }
.mt-row output { color: var(--amber); font-weight: 800; }
.mt-row input[type=range] { width: 100%; accent-color: #8b5cf6; }
.mt-result {
  background: var(--card2); border: 1px solid var(--line); border-radius: 12px;
  padding: 14px 18px; font-size: 16px; margin-bottom: 8px;
}
.mt-result b { color: var(--pink); font-size: 20px; }
.fineprint { color: #64748b; font-size: 12px; }
.bet-opts { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 12px 0; }
.bet-btn {
  background: var(--card2); border: 1.5px solid var(--line); border-radius: 14px;
  color: var(--txt); padding: 16px; font-size: 15px; font-family: inherit; cursor: pointer;
  transition: .18s; text-align: center;
}
.bet-btn:hover { border-color: var(--amber); transform: translateY(-2px); }
.bet-btn.right { border-color: var(--green); background: rgba(74,222,128,.12); }
.bet-btn.wrong { border-color: var(--red); background: rgba(248,113,113,.1); }
.bet-expl { color: var(--sub); font-size: 14px; margin-top: 8px; }

/* API */
.cmp-table-wrap { overflow-x: auto; margin: 18px 0; border-radius: var(--radius); border: 1px solid var(--line); }
.cmp-table { width: 100%; border-collapse: collapse; font-size: 14.5px; background: var(--card); min-width: 560px; }
.cmp-table th, .cmp-table td { padding: 11px 16px; text-align: left; border-bottom: 1px solid var(--line); }
.cmp-table th { background: var(--card2); color: var(--cyan); font-size: 13.5px; }
.cmp-table tr:last-child td { border-bottom: none; }
.cmp-table td:first-child { color: var(--amber); font-weight: 700; white-space: nowrap; }
.steps-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin: 20px 0; }
.step {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; text-align: center; font-size: 13.5px; color: var(--sub);
}
.step span {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: 50%; margin-bottom: 8px;
  background: linear-gradient(135deg, #4f8cff, #8b5cf6); color: #fff; font-weight: 800; font-size: 16px;
}
.code-tabs { margin: 20px 0; }
.tab-btns { display: flex; gap: 8px; margin-bottom: -1px; }
.tab-btn {
  background: var(--card2); border: 1px solid var(--line); border-bottom: none;
  color: var(--sub); padding: 8px 18px; border-radius: 10px 10px 0 0; cursor: pointer;
  font-family: inherit; font-size: 13.5px; font-weight: 700;
}
.tab-btn.active { color: var(--cyan); background: #0d1424; border-color: var(--line); }
.code-box {
  background: #0d1424; border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; overflow-x: auto; font-size: 13.5px; line-height: 1.7;
  font-family: Consolas, "JetBrains Mono", monospace; color: #d6e2f0; white-space: pre;
}
.api-form { display: grid; gap: 12px; margin-bottom: 16px; max-width: 640px; }
.api-form label { font-size: 14px; display: grid; gap: 4px; }
.api-form select, .api-form input {
  background: #0d1424; border: 1.5px solid var(--line); color: var(--txt);
  border-radius: 10px; padding: 9px 12px; font-size: 14px; font-family: inherit;
}
.api-form select:focus, .api-form input:focus { outline: none; border-color: var(--cyan); }
.api-form small { color: var(--sub); }
.api-form input[type=range] { accent-color: #f59e0b; padding: 0; border: none; }
.api-io { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.api-io .code-box { min-height: 150px; white-space: pre-wrap; }
.warn-box {
  margin-top: 24px; background: rgba(248,113,113,.07); border: 1.5px solid rgba(248,113,113,.45);
  border-radius: var(--radius); padding: 18px 22px;
}
.warn-box h3 { color: var(--red); margin-bottom: 10px; font-size: 17px; }
.warn-box ul { padding-left: 20px; font-size: 14.5px; display: grid; gap: 7px; color: var(--sub); }
.warn-box b { color: var(--txt); }

/* CLI */
.cli-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 20px; }
.cli-card { background: var(--card); border: 1.5px solid var(--line); border-radius: var(--radius); padding: 20px; }
.cli-card > h3 { font-size: 19px; margin-bottom: 8px; }
.cli-card > p { color: var(--sub); font-size: 14px; margin-bottom: 12px; }
.cli-card .code-box { margin-bottom: 12px; }
.cli-card ul { padding-left: 18px; font-size: 14px; color: var(--sub); display: grid; gap: 6px; }
.tips-box { background: var(--card2); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px 22px; margin: 18px 0; }
.tips-box h3 { font-size: 17px; margin-bottom: 10px; }
.tips-box ol, .tips-box ul { padding-left: 22px; font-size: 14.5px; color: var(--sub); display: grid; gap: 7px; }
.tips-box b { color: var(--txt); }

/* 终端模拟器 */
.term-window {
  background: #0a0e17; border: 1.5px solid var(--line); border-radius: 14px; overflow: hidden;
  font-family: Consolas, "JetBrains Mono", monospace; box-shadow: var(--shadow);
}
.term-bar {
  background: #1b2438; padding: 8px 14px; display: flex; align-items: center; gap: 7px;
}
.dot { width: 12px; height: 12px; border-radius: 50%; display: inline-block; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.term-title { margin-left: 10px; color: var(--sub); font-size: 12px; }
.term-body { padding: 14px; height: 300px; overflow-y: auto; font-size: 13.5px; line-height: 1.75; }
.term-body .t-prompt { color: var(--green); }
.term-body .t-cmd { color: var(--txt); }
.term-body .t-out { color: #9fb3c8; white-space: pre-wrap; }
.term-body .t-ok { color: var(--green); }
.term-body .t-warn { color: var(--amber); }
.term-body .t-err { color: var(--red); }
.term-body .t-hl { color: var(--cyan); }
.term-input-row { display: flex; align-items: center; gap: 8px; border-top: 1px solid var(--line); padding: 10px 14px; }
.term-prompt { color: var(--green); font-family: Consolas, monospace; font-size: 13.5px; white-space: nowrap; }
#termInput {
  flex: 1; background: transparent; border: none; outline: none; color: var(--txt);
  font-family: Consolas, monospace; font-size: 13.5px; caret-color: var(--cyan);
}

/* Agent / Harness */
.vocab-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 14px; margin-bottom: 24px; }
.vocab-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; font-size: 14.5px; }
.vocab-card h3 { font-size: 17px; margin-bottom: 8px; }
.vocab-card p { color: var(--sub); }
.vocab-card .eg { margin-top: 8px; color: var(--cyan); font-size: 13.5px; border-left: 3px solid var(--cyan); padding-left: 10px; }
.loop-wrap { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin-bottom: 18px; }
.loop-wrap h3 { margin-bottom: 12px; font-size: 17px; }
.loop-wrap svg { width: 100%; max-width: 640px; display: block; margin: 0 auto; height: auto; }
.onion-wrap { margin: 10px 0 20px; }
.onion-wrap h3 { font-size: 17px; margin-bottom: 14px; }
.layer { border-radius: 14px; padding: 14px 16px; }
.layer > span { display: block; font-size: 13.5px; font-weight: 700; margin-bottom: 10px; }
.l5 { background: rgba(103,232,249,.08); border: 1.5px solid rgba(103,232,249,.5); }
.l5 > span { color: var(--cyan); }
.l4 { background: rgba(248,113,113,.07); border: 1.5px solid rgba(248,113,113,.45); }
.l4 > span { color: var(--red); }
.l3 { background: rgba(251,191,36,.07); border: 1.5px solid rgba(251,191,36,.45); }
.l3 > span { color: var(--amber); }
.l2 { background: rgba(167,139,250,.1); border: 1.5px solid rgba(167,139,250,.5); }
.l2 > span { color: var(--purple); }
.l1 { background: linear-gradient(135deg, #312e81, #4c1d95); border: 1.5px solid var(--purple); text-align: center; }
.l1 > span { color: #fff; font-size: 15px; margin-bottom: 0; }
.loop-board { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 6px; }
.loop-step {
  background: var(--card2); border: 1.5px solid var(--line); border-radius: 12px;
  color: var(--txt); padding: 12px 18px; font-size: 15px; font-family: inherit; cursor: pointer; transition: .18s;
}
.loop-step:hover { border-color: var(--purple); }
.loop-step.done { border-color: var(--green); background: rgba(74,222,128,.13); color: var(--green); cursor: default; opacity: .9; }
.loop-step.done::after { content: " ✓"; }
.loop-step.bad { animation: shake .35s; border-color: var(--red); }
.loop-step .ord { color: var(--sub); font-size: 12px; margin-left: 6px; }
.skill-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px; margin-bottom: 16px; }
.skill-card {
  background: var(--card2); border: 1.5px solid var(--line); border-radius: 12px;
  padding: 14px; cursor: pointer; transition: .18s; font-size: 14px; user-select: none;
}
.skill-card:hover { border-color: var(--cyan); }
.skill-card.picked { border-color: var(--cyan); background: rgba(103,232,249,.1); }
.skill-card.right { border-color: var(--green); }
.skill-card.wrongpick { border-color: var(--red); }
.skill-card b { display: block; margin-bottom: 4px; }
.skill-card small { color: var(--sub); }

/* 企业 */
.ent-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; margin-bottom: 20px; }
.ent-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; font-size: 14.5px; }
.ent-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.ent-card p { color: var(--sub); }
.tree-box { background: var(--card2); border: 1px solid var(--line); border-radius: 12px; padding: 18px; min-height: 120px; }
.tree-q { font-size: 16px; font-weight: 700; margin-bottom: 14px; }
.tree-opts { display: grid; gap: 10px; }
.tree-opt {
  background: var(--card); border: 1.5px solid var(--line); border-radius: 12px;
  color: var(--txt); padding: 12px 16px; text-align: left; font-size: 14.5px;
  font-family: inherit; cursor: pointer; transition: .18s;
}
.tree-opt:hover { border-color: var(--cyan); transform: translateX(4px); }
.tree-result h4 { color: var(--cyan); font-size: 17px; margin-bottom: 8px; }
.tree-result p, .tree-result li { color: var(--sub); font-size: 14.5px; }
.tree-result ul { padding-left: 20px; display: grid; gap: 5px; }

/* 编辑器 */
.copilot-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 22px; }
.cop-card { background: var(--card); border: 1.5px solid var(--line); border-radius: var(--radius); padding: 20px; font-size: 14.5px; }
.cop-card h3 { font-size: 18px; margin-bottom: 10px; }
.cop-card ul { padding-left: 18px; color: var(--sub); display: grid; gap: 8px; }
.cop-card .eg { margin-top: 12px; color: var(--amber); font-size: 13px; }
.vscode-mock {
  border: 1.5px solid var(--line); border-radius: 14px; overflow: hidden; margin-bottom: 20px;
  box-shadow: var(--shadow);
}
.vsc-titlebar { background: #1b2438; padding: 8px 14px; display: flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--sub); }
.vsc-body { display: grid; grid-template-columns: 1.6fr 1fr; background: #0a0e17; }
.vsc-editor { padding: 14px 0; font-family: Consolas, monospace; font-size: 13.5px; border-right: 1px solid var(--line); }
.vsc-line { padding: 2px 14px; white-space: pre; }
.ln { color: #475569; display: inline-block; width: 30px; user-select: none; }
.kw { color: var(--pink); } .fn { color: #93c5fd; } .str { color: var(--green); }
.num { color: var(--amber); } .cm { color: #64748b; font-style: italic; }
.vsc-line.ghost { opacity: .45; font-style: italic; }
.vsc-line.ghost i { color: var(--cyan); font-size: 11px; }
.cursor { animation: blink 1s step-start infinite; color: var(--cyan); }
.vsc-chat { padding: 14px; display: flex; flex-direction: column; gap: 10px; font-size: 13.5px; }
.vsc-chat-head { color: var(--cyan); font-weight: 800; font-size: 13px; }
.vsc-msg { padding: 9px 12px; border-radius: 10px; max-width: 92%; }
.vsc-msg.user { background: #312e81; align-self: flex-end; }
.vsc-msg.ai { background: var(--card2); border: 1px solid var(--line); align-self: flex-start; }
.vsc-input { margin-top: auto; border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; color: #64748b; font-size: 13px; }

/* 测验 & 勋章 */
.quiz-wrap { display: grid; grid-template-columns: 1.7fr 1fr; gap: 20px; align-items: start; }
.q-card { margin-bottom: 18px; }
.q-title { font-size: 16.5px; font-weight: 800; margin-bottom: 12px; }
.q-opts { display: grid; gap: 9px; }
.opt {
  background: var(--card2); border: 1.5px solid var(--line); border-radius: 12px;
  color: var(--txt); padding: 11px 15px; text-align: left; font-size: 14.5px;
  font-family: inherit; cursor: pointer; transition: .18s;
}
.opt:hover { border-color: var(--cyan); }
.opt.right { border-color: var(--green); background: rgba(74,222,128,.12); }
.opt.wrong { border-color: var(--red); background: rgba(248,113,113,.1); }
.opt:disabled { cursor: default; }
.q-expl { margin-top: 10px; font-size: 13.5px; color: var(--amber); border-left: 3px solid var(--amber); padding-left: 10px; }
.quiz-progress { height: 8px; background: #0d1424; border: 1px solid var(--line); border-radius: 99px; overflow: hidden; margin-top: 14px; }
.quiz-progress-fill { height: 100%; width: 0%; background: linear-gradient(90deg, var(--cyan), var(--purple)); transition: width .4s; }
.quiz-final { text-align: center; padding: 20px 0 6px; }
.quiz-final .score { font-size: 46px; font-weight: 900; background: linear-gradient(90deg, var(--cyan), var(--pink)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.quiz-final .title-rank { font-size: 22px; font-weight: 800; color: var(--amber); margin: 6px 0; }
.badge-wall { background: var(--card); border: 1.5px solid var(--line); border-radius: var(--radius); padding: 18px; position: sticky; top: 90px; }
.badge-wall h3 { font-size: 16px; margin-bottom: 12px; }
.badge-item {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 10px;
  font-size: 13.5px; margin-bottom: 6px; background: var(--card2); border: 1px solid var(--line);
}
.badge-item .b-ico { font-size: 20px; filter: grayscale(1); opacity: .35; }
.badge-item.earned .b-ico { filter: none; opacity: 1; }
.badge-item.earned { border-color: rgba(251,191,36,.5); }
.badge-item.locked-name { color: #64748b; }
.badge-item.earned .b-name { color: var(--amber); font-weight: 700; }

/* 彩带 & 提示 */
#confettiStage { position: fixed; inset: 0; pointer-events: none; z-index: 99; overflow: hidden; }
.cf { position: absolute; width: 10px; height: 10px; top: -20px; animation: fall linear forwards; }
@keyframes fall { to { transform: translateY(110vh) rotate(720deg); opacity: .6; } }
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translateX(-50%);
  background: linear-gradient(90deg, #1e293b, #312e81); border: 1.5px solid var(--amber);
  color: #fff; padding: 12px 22px; border-radius: 14px; font-size: 15px; font-weight: 700;
  z-index: 100; box-shadow: 0 10px 30px rgba(0,0,0,.5); animation: toastin .35s ease;
}
@keyframes toastin { from { transform: translateX(-50%) translateY(20px); opacity: 0; } to { transform: translateX(-50%) translateY(0); opacity: 1; } }
.to-top {
  position: fixed; right: 22px; bottom: 26px; z-index: 60; width: 46px; height: 46px;
  border-radius: 50%; border: 1.5px solid var(--line); background: var(--card2);
  font-size: 20px; cursor: pointer; transition: .2s;
}
.to-top:hover { border-color: var(--cyan); transform: translateY(-3px); }

/* footer */
.footer { border-top: 1px solid var(--line); margin-top: 60px; padding: 30px 16px 40px; text-align: center; color: var(--sub); font-size: 14px; display: grid; gap: 8px; }

/* 响应式 */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-art { order: -1; }
  .faction-grid, .cli-grid, .copilot-grid, .api-io, .quiz-wrap { grid-template-columns: 1fr; }
  .badge-wall { position: static; }
  .vsc-body { grid-template-columns: 1fr; }
  .match-board { grid-template-columns: 1fr; }
  .bet-opts { grid-template-columns: 1fr; }
  .xp-wrap { order: 3; width: 100%; }
  .xp-bar { flex: 1; }
}