/* Tapehack site. No external fonts, scripts or trackers. */
:root {
  --bg: #15171c;
  --panel: #1b1e24;
  --panel-2: #20242b;
  --line: #2c3038;
  --text: #e8e9ec;
  --muted: #a7abb3;
  --dim: #7d828c;
  --gold: #c9a23f;
  --gold-soft: rgba(201, 162, 63, 0.12);
  --sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  --mono: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --wrap: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img, svg { display: block; }
h1, h2, h3 { margin: 0; line-height: 1.25; font-weight: 700; }
p { margin: 0; }
ul { margin: 0; padding: 0; list-style: none; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }

/* Header */
.top {
  position: sticky; top: 0; z-index: 10;
  background: rgba(21, 23, 28, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(8px);
}
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; }
.brand svg { width: 42px; height: 35px; }
.word { font-size: 22px; letter-spacing: -0.3px; line-height: 1; }
.word .t { font-weight: 300; color: #b9bcc3; }
.word .h { font-weight: 700; color: #fff; }
.nav { display: flex; align-items: center; gap: 22px; font-size: 15px; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: var(--text); }
.lang { display: flex; gap: 2px; font-family: var(--mono); font-size: 12px; letter-spacing: 1px; border: 1px solid var(--line); border-radius: 6px; padding: 2px; }
.lang a, .lang span { padding: 3px 8px; border-radius: 4px; text-decoration: none; }
.lang span { background: var(--panel-2); color: var(--text); }
.lang a { color: var(--dim); }
.lang a:hover { color: var(--text); }

/* Hero */
.hero { padding: 96px 0 88px; border-bottom: 1px solid var(--line); }
.kicker { font-family: var(--mono); font-size: 13px; letter-spacing: 2.5px; color: var(--gold); }
.hero h1 { margin-top: 18px; font-size: 54px; letter-spacing: -0.5px; max-width: 900px; }
.hero .lead { margin-top: 24px; font-size: 19px; color: var(--muted); max-width: 760px; }
.cta { margin-top: 36px; display: flex; flex-wrap: wrap; gap: 14px; }
.btn { display: inline-block; padding: 12px 22px; border-radius: 8px; font-size: 16px; font-weight: 600; text-decoration: none; border: 1px solid var(--line); color: var(--text); }
.btn.primary { background: var(--gold); border-color: var(--gold); color: #15171c; }
.btn:hover { filter: brightness(1.08); }
.scanline { margin-top: 64px; height: 2px; background: linear-gradient(90deg, var(--gold), rgba(201, 162, 63, 0) 70%); }

/* Sections */
section { padding: 84px 0; border-bottom: 1px solid var(--line); }
.label { font-family: var(--mono); font-size: 12px; letter-spacing: 2.5px; color: var(--gold); }
/* Uppercase small labels only on English pages; Chinese labels keep normal case (Vibe Coding). */
html[lang="en"] .kicker, html[lang="en"] .label { text-transform: uppercase; }
html[lang="zh-CN"] .kicker, html[lang="zh-CN"] .label { letter-spacing: 1.5px; }
section h2 { margin-top: 12px; font-size: 34px; letter-spacing: -0.3px; max-width: 860px; }
.intro { margin-top: 18px; color: var(--muted); max-width: 820px; }
.grid { margin-top: 40px; display: grid; gap: 18px; }
.g2 { grid-template-columns: repeat(2, 1fr); }
.g3 { grid-template-columns: repeat(3, 1fr); }
.g4 { grid-template-columns: repeat(4, 1fr); }
.grid.start { align-items: start; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: 12px; padding: 26px; }
.card h3 { font-size: 19px; }
.card p, .card li { color: var(--muted); font-size: 16px; }
.card p { margin-top: 10px; }
.card .num { font-family: var(--mono); font-size: 13px; color: var(--gold); letter-spacing: 1px; }
.card .num + h3 { margin-top: 8px; }
.tag { display: inline-block; margin-top: 14px; font-family: var(--mono); font-size: 12px; letter-spacing: 1px; color: var(--gold); background: var(--gold-soft); border-radius: 4px; padding: 3px 8px; }
.bullets { margin-top: 12px; }
.bullets li { position: relative; padding-left: 18px; margin-top: 6px; }
.bullets li::before { content: ""; position: absolute; left: 0; top: 0.75em; width: 7px; height: 2px; background: var(--gold); }
.quote { margin-top: 36px; padding: 22px 26px; border-left: 3px solid var(--gold); background: var(--panel); border-radius: 0 10px 10px 0; font-size: 19px; font-weight: 600; }
.note { margin-top: 22px; color: var(--muted); font-size: 15px; }

/* Services */
.svc h3 { font-size: 22px; }
.svc .sub { margin-top: 6px; color: var(--dim); font-size: 15px; }
.rows { margin-top: 18px; border-top: 1px solid var(--line); }
.rows li { display: grid; grid-template-columns: 9.5em 1fr; gap: 14px; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 15.5px; }
.rows b { color: var(--text); font-weight: 600; }
.rows span { color: var(--muted); }

/* Gates */
.gates { counter-reset: gate; }
.gate { position: relative; }
.gate::after { content: ""; position: absolute; right: -14px; top: 50%; width: 10px; height: 10px; border-top: 2px solid var(--gold); border-right: 2px solid var(--gold); transform: translateY(-50%) rotate(45deg); }
.gate:last-child::after { display: none; }

/* Vision */
.vision { text-align: left; }
.vision .big { margin-top: 18px; font-size: 44px; font-weight: 700; letter-spacing: -0.4px; }
.vision .big em { font-style: normal; color: var(--gold); }
.vision .mission { margin-top: 20px; color: var(--muted); font-size: 18px; max-width: 820px; }

/* Contact */
.contact { display: grid; grid-template-columns: 1.1fr 1fr; gap: 18px; margin-top: 40px; }
.card p.mail { margin-top: 14px; font-size: 20px; font-weight: 600; word-break: break-all; }
.mail a { color: var(--gold); text-decoration: none; border-bottom: 1px solid rgba(201, 162, 63, 0.4); }
.mail a:hover { border-bottom-color: var(--gold); }

/* Footer */
footer { padding: 40px 0 56px; color: var(--dim); font-size: 14px; }
footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; }

/* 404 */
.nf { min-height: 70vh; display: flex; align-items: center; }
.nf h1 { font-size: 40px; margin-top: 14px; }
.nf p { margin-top: 14px; color: var(--muted); }

@media (max-width: 960px) {
  .g4 { grid-template-columns: repeat(2, 1fr); }
  .g3 { grid-template-columns: 1fr; }
  .gate::after { display: none; }
  .contact { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .nav a.opt { display: none; }
  .hero { padding: 64px 0 60px; }
  .hero h1 { font-size: 36px; }
  .hero .lead { font-size: 17px; }
  section { padding: 60px 0; }
  section h2 { font-size: 26px; }
  .g2, .g4 { grid-template-columns: 1fr; }
  .rows li { grid-template-columns: 1fr; gap: 2px; }
  .vision .big { font-size: 30px; }
  .card { padding: 22px; }
}

/* Reports */
.report { margin-top: 36px; max-width: 900px; }
.report h3 { margin-top: 8px; font-size: 22px; }
.files { margin-top: 20px; }
.files li { padding: 14px 0; border-top: 1px solid var(--line); }
.files a { color: var(--gold); font-weight: 600; text-decoration: none; border-bottom: 1px solid rgba(201, 162, 63, 0.4); }
.files a:hover { border-bottom-color: var(--gold); }
.hash { display: block; margin-top: 6px; font-family: var(--mono); font-size: 12.5px; color: var(--dim); word-break: break-all; }