/* 缀光 · 非连续性文本满分实验室 — Geek × Impressionist
   光斑（Impressionist 莫奈式柔光色斑）+ 网格/等宽字（Geek 终端感） */
:root {
  --paper: #f4f0e7;
  --paper-2: #efe9dc;
  --ink: #2a2533;
  --ink-soft: #5b5468;
  --ink-faint: #8b8398;
  --rose: #d6859f;
  --teal: #5fa9a3;
  --gold: #d9a957;
  --lavender: #9384c0;
  --sky: #7c9cc8;
  --line: rgba(42, 37, 51, 0.12);
  --line-strong: rgba(42, 37, 51, 0.22);
  --card: rgba(255, 253, 248, 0.66);
  --card-solid: #fdfbf6;
  --shadow: 0 10px 40px -18px rgba(42, 37, 51, 0.45);
  --serif: "Noto Serif SC", Georgia, "Songti SC", serif;
  --mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --sans: -apple-system, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --r: 16px;
  --grad: linear-gradient(120deg, var(--rose), var(--lavender) 40%, var(--teal) 78%, var(--gold));
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ---------- 光斑场 + 噪点 ---------- */
.light-field { position: fixed; inset: 0; z-index: -1; overflow: hidden;
  background:
    radial-gradient(120% 90% at 50% -10%, #fbf7ef, var(--paper) 55%, var(--paper-2)); }
.blob { position: absolute; border-radius: 50%; filter: blur(60px); opacity: 0.5;
  mix-blend-mode: multiply; animation: drift 26s ease-in-out infinite; }
.b1 { width: 46vw; height: 46vw; left: -8vw; top: -6vw; background: var(--rose); }
.b2 { width: 40vw; height: 40vw; right: -6vw; top: 4vw; background: var(--teal); animation-delay: -6s; }
.b3 { width: 34vw; height: 34vw; left: 18vw; bottom: -10vw; background: var(--gold); animation-delay: -12s; }
.b4 { width: 30vw; height: 30vw; right: 10vw; bottom: -6vw; background: var(--lavender); animation-delay: -3s; }
.b5 { width: 24vw; height: 24vw; left: 44vw; top: 28vw; background: var(--sky); opacity: 0.35; animation-delay: -16s; }
@keyframes drift {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(4vw, 3vh) scale(1.08); }
  66% { transform: translate(-3vw, -2vh) scale(0.95); }
}
.grain { position: absolute; inset: -50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.05; }
@media (prefers-reduced-motion: reduce) { .blob { animation: none; } }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 18px;
  padding: 12px clamp(16px, 4vw, 48px);
  background: rgba(244, 240, 231, 0.78);
  backdrop-filter: blur(14px) saturate(1.2);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); margin-right: auto; }
.brand-mark { position: relative; width: 30px; height: 26px; display: inline-block; }
.brand-mark i { position: absolute; width: 17px; height: 17px; border-radius: 50%; mix-blend-mode: multiply; }
.brand-mark i:nth-child(1) { left: 0; top: 4px; background: var(--rose); }
.brand-mark i:nth-child(2) { left: 9px; top: 0; background: var(--teal); }
.brand-mark i:nth-child(3) { left: 6px; top: 9px; background: var(--gold); }
.brand-text { font-family: var(--serif); font-weight: 900; font-size: 19px; letter-spacing: 0.04em; }
.brand-text em { font-style: normal; font-weight: 400; font-size: 12px; color: var(--ink-faint); font-family: var(--mono); margin-left: 6px; letter-spacing: 0; }
.topnav { display: flex; gap: 6px; }
.topnav a { font-size: 14.5px; color: var(--ink-soft); text-decoration: none; padding: 7px 14px; border-radius: 10px; transition: 0.18s; font-weight: 500; }
.topnav a:hover { color: var(--ink); background: rgba(255, 255, 255, 0.55); }
.topnav a.active { color: #fff; background: var(--ink); }
.navtoggle { display: none; background: none; border: 1px solid var(--line-strong); border-radius: 10px; font-size: 20px; width: 40px; height: 38px; cursor: pointer; color: var(--ink); }

/* ---------- 布局 ---------- */
main { max-width: 1080px; margin: 0 auto; padding: clamp(24px, 4vw, 52px) clamp(16px, 4vw, 40px) 80px; }
.loading { text-align: center; color: var(--ink-faint); padding: 100px 0; font-family: var(--mono); }
.section-eyebrow { font-family: var(--mono); font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--teal); margin-bottom: 8px; }
.section-eyebrow::before { content: "// "; opacity: 0.6; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.3; letter-spacing: 0.01em; }

/* ---------- 卡片通用 ---------- */
.card { background: var(--card); backdrop-filter: blur(10px); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); }
.pad { padding: clamp(18px, 3vw, 30px); }
.grid { display: grid; gap: 16px; }
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 860px) { .cols-3, .cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cols-2, .cols-3, .cols-4 { grid-template-columns: 1fr; } }

.tag { display: inline-block; font-family: var(--mono); font-size: 11.5px; padding: 2px 9px; border-radius: 20px; background: rgba(255, 255, 255, 0.6); border: 1px solid var(--line); color: var(--ink-soft); }
.tag.teal { color: #2f6f6a; border-color: rgba(95, 169, 163, 0.5); background: rgba(95, 169, 163, 0.12); }
.tag.rose { color: #9c4663; border-color: rgba(214, 133, 159, 0.5); background: rgba(214, 133, 159, 0.13); }
.tag.gold { color: #8a6311; border-color: rgba(217, 169, 87, 0.5); background: rgba(217, 169, 87, 0.16); }
.tag.lav { color: #574a86; border-color: rgba(147, 132, 192, 0.5); background: rgba(147, 132, 192, 0.14); }

.btn { font-family: var(--sans); font-size: 14.5px; font-weight: 600; border: none; border-radius: 11px; padding: 11px 20px; cursor: pointer; transition: 0.18s; color: var(--ink); background: rgba(255, 255, 255, 0.7); border: 1px solid var(--line-strong); }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn.primary { color: #fff; background: var(--ink); border-color: var(--ink); }
.btn.accent { color: #fff; background: linear-gradient(120deg, var(--rose), var(--lavender)); border: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
.btn.sm { padding: 7px 13px; font-size: 13px; border-radius: 9px; }

/* ---------- HERO ---------- */
.hero { text-align: center; padding: clamp(30px, 6vw, 70px) 0 28px; }
.hero h1 { font-size: clamp(34px, 7vw, 60px); font-weight: 900; margin: 0 0 12px; }
.hero h1 .glow { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { font-size: clamp(15px, 2.2vw, 19px); color: var(--ink-soft); max-width: 680px; margin: 0 auto 26px; }
.hero .cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.statbar { display: flex; gap: clamp(14px, 4vw, 48px); justify-content: center; flex-wrap: wrap; margin: 38px 0 8px; }
.statbar .s { text-align: center; }
.statbar .n { font-family: var(--mono); font-weight: 700; font-size: clamp(26px, 5vw, 38px); color: var(--ink); display: block; }
.statbar .l { font-size: 12.5px; color: var(--ink-faint); letter-spacing: 0.04em; }

/* module cards on home */
.modcard { display: block; text-decoration: none; color: inherit; position: relative; overflow: hidden; transition: 0.2s; }
.modcard:hover { transform: translateY(-3px); }
.modcard .ic { font-family: var(--mono); font-size: 12px; color: var(--teal); }
.modcard h3 { margin: 8px 0 6px; font-size: 20px; }
.modcard p { margin: 0; color: var(--ink-soft); font-size: 14px; }
.modcard .arrow { position: absolute; right: 20px; bottom: 16px; font-size: 20px; color: var(--ink-faint); transition: 0.2s; }
.modcard:hover .arrow { color: var(--rose); transform: translateX(3px); }
.modcard .stripe { position: absolute; left: 0; top: 0; bottom: 0; width: 5px; background: var(--grad); }

/* ---------- 攻略 / 长文 ---------- */
.guide-layout { display: grid; grid-template-columns: 200px 1fr; gap: 28px; align-items: start; }
.workshop-layout { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 22px; align-items: start; margin-top: 18px; }
.guide-toc { position: sticky; top: 70px; }
.guide-toc a { display: block; padding: 5px 10px; font-size: 13.5px; color: var(--ink-soft); text-decoration: none; border-left: 2px solid transparent; border-radius: 0 6px 6px 0; }
.guide-toc a:hover, .guide-toc a.active { color: var(--ink); border-left-color: var(--rose); background: rgba(255, 255, 255, 0.5); }
.prose h2 { font-size: 25px; margin: 6px 0 14px; }
.prose h3 { font-size: 18px; margin: 18px 0 8px; }
.prose p { margin: 0 0 12px; }
.lede { font-size: 16px; color: var(--ink-soft); border-left: 3px solid var(--gold); padding-left: 16px; background: rgba(217, 169, 87, 0.06); border-radius: 0 8px 8px 0; padding: 12px 16px; }
.trap-item { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; background: rgba(255, 255, 255, 0.5); }
.trap-item .tt { font-family: var(--serif); font-weight: 700; font-size: 16px; color: #9c4663; }
.trap-item .radar { font-size: 13px; color: var(--ink-soft); margin-top: 6px; }
.trap-item .radar b { color: var(--teal); font-family: var(--mono); font-size: 11px; }
.step { display: flex; gap: 14px; align-items: flex-start; padding: 12px 0; border-bottom: 1px dashed var(--line); }
.step .num { font-family: var(--mono); font-weight: 700; color: #fff; background: var(--ink); min-width: 30px; height: 30px; border-radius: 8px; display: grid; place-items: center; font-size: 13px; }
.tmpl { border-radius: 12px; border: 1px solid var(--line); overflow: hidden; }
.tmpl summary { cursor: pointer; padding: 12px 16px; font-family: var(--serif); font-weight: 700; background: rgba(255, 255, 255, 0.55); list-style: none; }
.tmpl summary::-webkit-details-marker { display: none; }
.tmpl summary::before { content: "▸ "; color: var(--rose); }
.tmpl[open] summary::before { content: "▾ "; }
.tmpl .body { padding: 4px 16px 14px; }
.tmpl .formula { font-size: 14px; }
.tmpl .tip { font-size: 13px; color: var(--ink-soft); margin-top: 6px; }
.year-row { display: grid; grid-template-columns: 64px 1fr; gap: 14px; padding: 13px 0; border-bottom: 1px dashed var(--line); }
.year-row .yr { font-family: var(--mono); font-weight: 700; font-size: 22px; color: var(--lavender); }

/* ---------- 语料库 / 题目 ---------- */
.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 18px; }
.chip { font-family: var(--mono); font-size: 13px; padding: 6px 13px; border-radius: 9px; border: 1px solid var(--line-strong); background: rgba(255, 255, 255, 0.6); cursor: pointer; color: var(--ink-soft); transition: 0.15s; }
.chip:hover { color: var(--ink); }
.chip.active { background: var(--ink); color: #fff; border-color: var(--ink); }
.corpus-card { cursor: pointer; transition: 0.2s; }
.corpus-card:hover { transform: translateY(-2px); }
.corpus-card .yr { font-family: var(--mono); font-size: 30px; font-weight: 700; }
.corpus-card .meta { font-size: 13px; color: var(--ink-soft); }

.material { font-size: 15.5px; line-height: 1.95; white-space: pre-wrap; }
.material .mlabel { font-family: var(--serif); font-weight: 700; color: var(--teal); }
.reading { max-height: 60vh; overflow-y: auto; padding-right: 8px; }
.reading::-webkit-scrollbar { width: 8px; }
.reading::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 8px; }

.q { border-top: 1px solid var(--line); padding: 20px 0; }
.q .qhead { display: flex; gap: 10px; align-items: baseline; }
.q .qno { font-family: var(--mono); font-weight: 700; color: var(--rose); }
.q .stem { font-weight: 600; font-size: 16px; margin: 2px 0 12px; }
.opt { display: flex; gap: 10px; padding: 9px 13px; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; cursor: pointer; transition: 0.13s; background: rgba(255, 255, 255, 0.4); }
.opt:hover { border-color: var(--line-strong); }
.opt.sel { border-color: var(--lavender); background: rgba(147, 132, 192, 0.12); }
.opt.correct { border-color: var(--teal); background: rgba(95, 169, 163, 0.15); }
.opt.wrong { border-color: var(--rose); background: rgba(214, 133, 159, 0.15); }
.opt .k { font-family: var(--mono); font-weight: 700; }
textarea.answer { width: 100%; min-height: 96px; border: 1px solid var(--line-strong); border-radius: 11px; padding: 12px 14px; font-family: var(--sans); font-size: 15px; line-height: 1.7; resize: vertical; background: rgba(255, 255, 255, 0.7); color: var(--ink); }
textarea.answer:focus { outline: 2px solid var(--lavender); border-color: transparent; }

.reveal { border-left: 3px solid var(--teal); background: rgba(95, 169, 163, 0.08); padding: 12px 15px; border-radius: 0 10px 10px 0; margin-top: 10px; font-size: 14.5px; }
.reveal .ans { font-family: var(--mono); font-weight: 700; color: #2f6f6a; }
.grade-box { border-radius: 12px; border: 1px solid var(--line); padding: 14px 16px; margin-top: 10px; background: rgba(255, 255, 255, 0.55); }
.grade-box .sc { font-family: var(--mono); font-weight: 700; font-size: 17px; }
.grade-box .row { margin: 6px 0; font-size: 14px; }
.grade-box .row b { color: var(--ink); }
.dim { color: var(--ink-faint); }
.pts { list-style: none; padding: 0; margin: 4px 0; }
.pts li { font-size: 13.5px; padding: 2px 0 2px 18px; position: relative; }
.pts li::before { position: absolute; left: 0; }
.pts.win li::before { content: "✓"; color: var(--teal); }
.pts.lose li::before { content: "✗"; color: var(--rose); }

/* chat */
.chat { margin-top: 12px; border-top: 1px dashed var(--line); padding-top: 12px; }
.chat-log { display: flex; flex-direction: column; gap: 9px; margin-bottom: 10px; max-height: 340px; overflow-y: auto; }
.msg { max-width: 86%; padding: 9px 13px; border-radius: 13px; font-size: 14px; line-height: 1.65; white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: var(--ink); color: #fff; border-bottom-right-radius: 4px; }
.msg.ai { align-self: flex-start; background: rgba(255, 255, 255, 0.75); border: 1px solid var(--line); border-bottom-left-radius: 4px; }
.chat-input { display: flex; gap: 8px; }
.chat-input input { flex: 1; border: 1px solid var(--line-strong); border-radius: 10px; padding: 10px 13px; font-size: 14px; background: rgba(255, 255, 255, 0.7); font-family: var(--sans); color: var(--ink); }
.chat-input input:focus { outline: 2px solid var(--lavender); border-color: transparent; }

/* mock list */
.mock-card { cursor: pointer; transition: 0.2s; position: relative; overflow: hidden; }
.mock-card:hover { transform: translateY(-3px); }
.mock-card .field { font-family: var(--mono); font-size: 12px; color: var(--teal); }
.mock-card h3 { margin: 7px 0; font-size: 19px; }
.mock-card .based { font-size: 13px; color: var(--ink-soft); }

.scorebar { position: sticky; bottom: 14px; z-index: 30; display: flex; justify-content: space-between; align-items: center; gap: 14px; background: var(--ink); color: #fff; padding: 12px 18px; border-radius: 14px; box-shadow: var(--shadow); margin-top: 20px; }
.scorebar .big { font-family: var(--mono); font-weight: 700; font-size: 20px; }

/* workshop */
.field-label { font-size: 13px; font-weight: 600; color: var(--ink-soft); margin: 12px 0 5px; display: block; }
input.txt, select.txt { width: 100%; border: 1px solid var(--line-strong); border-radius: 10px; padding: 10px 13px; font-size: 14.5px; background: rgba(255, 255, 255, 0.7); font-family: var(--sans); color: var(--ink); }
.opt-edit { display: flex; gap: 8px; align-items: center; margin-bottom: 7px; }
.opt-edit .k { font-family: var(--mono); font-weight: 700; width: 22px; }
.gallery-card { transition: 0.18s; }
.gallery-card:hover { transform: translateY(-2px); }
.stars { color: var(--gold); font-size: 15px; letter-spacing: 1px; }
.review-box { border-radius: 12px; border: 1px solid rgba(147, 132, 192, 0.4); background: rgba(147, 132, 192, 0.08); padding: 14px 16px; }
.review-box h4 { margin: 0 0 8px; font-family: var(--serif); }

.crumb { font-family: var(--mono); font-size: 13px; color: var(--ink-faint); margin-bottom: 14px; }
.crumb a { color: var(--teal); text-decoration: none; }
.spin { display: inline-block; width: 14px; height: 14px; border: 2px solid rgba(255,255,255,.4); border-top-color: #fff; border-radius: 50%; animation: sp 0.7s linear infinite; vertical-align: -2px; }
.spin.dark { border-color: var(--line-strong); border-top-color: var(--ink); }
@keyframes sp { to { transform: rotate(360deg); } }
.toast { position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%); background: var(--ink); color: #fff; padding: 11px 20px; border-radius: 12px; font-size: 14px; z-index: 200; box-shadow: var(--shadow); }

.sitefoot { text-align: center; padding: 30px 20px 40px; color: var(--ink-faint); font-size: 12.5px; display: flex; flex-direction: column; gap: 5px; border-top: 1px solid var(--line); }
.sitefoot .mono { font-family: var(--mono); }
.empty { text-align: center; color: var(--ink-faint); padding: 40px 0; }

@media (max-width: 760px) {
  .topnav { display: none; position: absolute; top: 60px; right: 12px; flex-direction: column; background: var(--card-solid); padding: 8px; border-radius: 12px; box-shadow: var(--shadow); border: 1px solid var(--line); }
  .topnav.open { display: flex; }
  .navtoggle { display: block; }
  .guide-toc { display: none; }
  .guide-layout, .workshop-layout { grid-template-columns: 1fr; gap: 16px; }
}