/* ═══════════════════════════════════════════════════════════════
   Mason · 闻道文心 — 宣纸 / 墨 / 朱砂
   editorial ink: paper #f5f0e6, ink #1c1914, vermillion #a63a28
   ═══════════════════════════════════════════════════════════════ */
:root {
  --paper: #f5f0e6;
  --paper-deep: #ede6d6;
  --card: #fbf8f0;
  --ink: #1c1914;
  --ink-soft: #57503f;
  --ink-faint: #8a8171;
  --vermillion: #a63a28;
  --vermillion-deep: #8c2f1f;
  --gold: #8a6d3b;
  --night: #171310;
  --night-ink: #e8e0cd;
  --hairline: rgba(28, 25, 20, 0.16);
  --hairline-strong: rgba(28, 25, 20, 0.34);
  --serif: "Georgia", "Times New Roman", "Noto Serif SC", "Source Han Serif SC",
           "Songti SC", "STSong", "SimSun", serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --wrap: 1120px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--serif);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}
/* 宣纸底纹:极淡的横向纤维 */
body::before {
  content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background:
    repeating-linear-gradient(0deg, transparent 0 2px, rgba(28,25,20,.012) 2px 4px),
    repeating-linear-gradient(90deg, transparent 0 3px, rgba(28,25,20,.008) 3px 6px);
}
main, section, header, footer, .wrap { position: relative; z-index: 1; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }
a { color: inherit; }
img { display: inline-block; vertical-align: middle; }

/* ── 页眉 ─────────────────────────────────────────────────────── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245, 240, 230, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-seal { border-radius: 6px; }
.brand-name { font-size: 17px; letter-spacing: 0.02em; }
.brand-name b { font-weight: 700; }
.brand-name i { font-style: normal; color: var(--ink-soft); margin-left: 8px; font-size: 14px; }
.site-nav { display: flex; align-items: center; gap: 26px; }
.site-nav a { text-decoration: none; font-size: 15px; color: var(--ink-soft); letter-spacing: 0.06em; transition: color .2s; }
.site-nav a:hover { color: var(--vermillion); }
.lang-toggle {
  font-family: var(--serif); font-size: 14px; letter-spacing: 0.08em;
  background: none; border: 1px solid var(--hairline-strong); border-radius: 999px;
  padding: 4px 14px; cursor: pointer; color: var(--ink); transition: all .2s;
}
.lang-toggle:hover { border-color: var(--vermillion); color: var(--vermillion); }

/* ── 首屏 ─────────────────────────────────────────────────────── */
.hero { padding: 96px 0 0; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1fr 200px; gap: 40px; align-items: start; }
.kicker { display: flex; align-items: center; gap: 10px; font-size: 13.5px; letter-spacing: 0.22em; color: var(--ink-soft); text-transform: uppercase; }
.kicker-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--vermillion); box-shadow: 0 0 0 4px rgba(166,58,40,.15); }
.hero-title { font-size: clamp(40px, 6vw, 68px); line-height: 1.22; font-weight: 700; letter-spacing: 0.01em; margin: 26px 0 8px; }
.hero-title-en {
  display: block; margin-top: 18px;
  font-size: clamp(19px, 2.2vw, 26px); font-weight: 400; font-style: italic;
  color: var(--gold); letter-spacing: 0.01em; line-height: 1.5;
}
.hero-sub { max-width: 620px; color: var(--ink-soft); font-size: 17.5px; margin-top: 22px; }
.hero-cta { display: flex; gap: 16px; margin-top: 36px; flex-wrap: wrap; }

.hero-side { display: flex; flex-direction: column; align-items: center; gap: 34px; padding-top: 12px; }
.vertical-text {
  writing-mode: vertical-rl; font-size: 21px; letter-spacing: 0.5em;
  color: var(--ink-faint); border-left: 1px solid var(--hairline); padding-left: 18px;
  min-height: 240px;
}
/* 卦象:六爻 */
.hexagram { display: flex; flex-direction: column-reverse; gap: 9px; }
.hx-line { width: 74px; height: 9px; background: var(--ink); border-radius: 1px; }
.hx-line.hx-broken {
  background: none; position: relative;
}
.hx-line.hx-broken::before, .hx-line.hx-broken::after {
  content: ""; position: absolute; top: 0; width: 30px; height: 9px; background: var(--ink); border-radius: 1px;
}
.hx-line.hx-broken::before { left: 0; }
.hx-line.hx-broken::after { right: 0; }
.hexagram-anim .hx-line { animation: inkIn 1s both; transform-origin: left; }
.hexagram-anim .hx-line:nth-child(1) { animation-delay: .1s; }
.hexagram-anim .hx-line:nth-child(2) { animation-delay: .25s; }
.hexagram-anim .hx-line:nth-child(3) { animation-delay: .4s; }
.hexagram-anim .hx-line:nth-child(4) { animation-delay: .55s; }
.hexagram-anim .hx-line:nth-child(5) { animation-delay: .7s; }
.hexagram-anim .hx-line:nth-child(6) { animation-delay: .85s; }

@keyframes inkIn { from { transform: scaleX(0); opacity: 0; } to { transform: scaleX(1); opacity: 1; } }

/* 数据条 */
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--hairline);
  margin-top: 72px;
}
.stat { padding: 26px 8px 30px; border-left: 1px solid var(--hairline); }
.stat:first-child { border-left: none; padding-left: 0; }
.stat b { display: block; font-size: 34px; font-weight: 700; letter-spacing: 0.01em; }
.stat span { font-size: 13.5px; color: var(--ink-faint); letter-spacing: 0.08em; }

/* ── 区块骨架 ─────────────────────────────────────────────────── */
section { padding: 100px 0; }
.section-label { font-family: var(--mono); font-size: 13px; letter-spacing: 0.3em; color: var(--vermillion); text-transform: uppercase; }
.section-title { font-size: clamp(28px, 3.6vw, 42px); font-weight: 700; margin-top: 14px; line-height: 1.3; }
.section-note { max-width: 640px; color: var(--ink-soft); margin-top: 16px; font-size: 15.5px; }

/* ── 作品 ─────────────────────────────────────────────────────── */
.works { background: linear-gradient(180deg, var(--paper) 0%, var(--paper-deep) 100%); }
.work-card {
  display: grid; grid-template-columns: 300px 1fr; gap: 0;
  background: var(--card); border: 1px solid var(--hairline);
  margin-top: 44px; overflow: hidden;
  box-shadow: 0 1px 0 var(--hairline), 0 24px 60px -44px rgba(28, 25, 20, 0.5);
}
.work-visual {
  position: relative; min-height: 320px;
  display: flex; align-items: center; justify-content: center;
  border-right: 1px solid var(--hairline);
}
.work-card.yi .work-visual {
  background:
    radial-gradient(ellipse at 50% 40%, rgba(166,58,40,.06), transparent 70%),
    repeating-linear-gradient(0deg, transparent 0 46px, rgba(28,25,20,.05) 46px 47px);
}
.coin {
  width: 92px; height: 92px; border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #e8c96a, #b98a2f 58%, #8a621c);
  box-shadow: inset 0 2px 6px rgba(255,255,255,.5), inset 0 -8px 14px rgba(90,60,10,.45), 0 14px 26px -12px rgba(60,40,8,.55);
  display: flex; align-items: center; justify-content: center;
  color: #4a3410; font-size: 40px; font-weight: 700;
  animation: coinFloat 5.2s ease-in-out infinite;
}
.coin-b { animation-delay: 1.1s; animation-duration: 6s; }
.coin-c { animation-delay: 2.2s; animation-duration: 5.6s; }
@keyframes coinFloat {
  0%, 100% { transform: translateY(0) rotate(-3deg); }
  50% { transform: translateY(-14px) rotate(4deg); }
}
.coin-a, .coin-c { position: absolute; }
.coin-a { top: 22%; left: 20%; }
.coin-b { position: relative; }
.coin-c { bottom: 22%; right: 20%; }

.news-visual {
  flex-direction: column; justify-content: center; gap: 18px;
  background:
    linear-gradient(180deg, rgba(23,19,16,.03), transparent 30%),
    repeating-linear-gradient(90deg, transparent 0 60px, rgba(28,25,20,.045) 60px 61px);
}
.ticker {
  width: 100%; overflow: hidden; border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline); padding: 12px 0;
  transform: rotate(-90deg) scale(1.15);
}
.ticker-track {
  display: inline-block; white-space: nowrap;
  font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.14em;
  color: var(--ink-faint);
  animation: ticker 26s linear infinite;
}
@keyframes ticker { from { transform: translateX(0); } to { transform: translateX(-50%); } }

.work-body { padding: 40px 44px 42px; }
.work-meta { display: flex; align-items: center; gap: 14px; }
.work-tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.18em;
  padding: 3px 10px; border-radius: 999px; text-transform: uppercase;
}
.tag-live { color: var(--vermillion); border: 1px solid rgba(166,58,40,.4); background: rgba(166,58,40,.05); }
.work-host { font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); letter-spacing: 0.04em; }
.work-title { font-size: 30px; font-weight: 700; margin-top: 14px; }
.work-title small { display: block; font-size: 16px; font-weight: 400; font-style: italic; color: var(--gold); margin-top: 6px; letter-spacing: 0.01em; }
.work-desc { color: var(--ink-soft); font-size: 15.5px; margin-top: 16px; }
.work-facts { list-style: none; margin-top: 20px; border-top: 1px solid var(--hairline); }
.work-facts li { display: flex; gap: 14px; padding: 10px 0; border-bottom: 1px solid var(--hairline); font-size: 14px; color: var(--ink-soft); align-items: baseline; }
.work-facts b { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; color: var(--ink); min-width: 74px; text-transform: uppercase; }
.work-links { display: flex; align-items: center; gap: 22px; margin-top: 24px; }
.work-sublink { font-size: 14.5px; color: var(--ink-soft); text-decoration: underline dotted; text-underline-offset: 4px; }
.work-sublink:hover { color: var(--vermillion); }

/* ── 按钮 ─────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--serif); font-size: 16px; letter-spacing: 0.04em;
  padding: 13px 30px; border-radius: 3px; cursor: pointer; text-decoration: none;
  border: 1px solid var(--ink); transition: all .22s ease;
  background: transparent; color: var(--ink);
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--vermillion); border-color: var(--vermillion); transform: translateY(-1px); }
.btn-ghost:hover { border-color: var(--vermillion); color: var(--vermillion); }
.btn-sm { font-size: 14.5px; padding: 10px 22px; }
.btn[disabled], .btn.disabled { opacity: 0.45; cursor: not-allowed; pointer-events: none; }

/* ── 开源与孵化(夜墨底) ───────────────────────────────────────── */
.oss { background: var(--night); color: var(--night-ink); }
.oss .section-label { color: #d08770; }
.oss .section-note { color: rgba(232, 224, 205, 0.66); }
.oss-list { margin-top: 20px; border-top: 1px solid rgba(232, 224, 205, 0.18); }

.oss-row {
  display: grid; grid-template-columns: 72px 1fr 64px; gap: 26px; align-items: center;
  padding: 30px 6px; border-bottom: 1px solid rgba(232, 224, 205, 0.18);
  text-decoration: none; color: inherit; position: relative;
  transition: background .25s, padding-left .25s;
}
a.oss-row:hover { background: rgba(232, 224, 205, 0.045); padding-left: 18px; }
.oss-num {
  font-family: var(--mono); font-size: 15px; letter-spacing: 0.12em;
  color: #d08770; border: 1px solid rgba(208, 135, 112, 0.4); border-radius: 999px;
  width: 54px; height: 54px; display: flex; align-items: center; justify-content: center;
}
.oss-body { display: flex; flex-direction: column; gap: 7px; min-width: 0; }
.oss-name { font-size: 23px; font-weight: 700; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.oss-tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.16em;
  padding: 3px 10px; border-radius: 999px; text-transform: uppercase; font-weight: 400;
}
.tag-oss { color: #9fd6ae; border: 1px solid rgba(159, 214, 174, 0.35); background: rgba(159, 214, 174, 0.06); }
.tag-priv { color: #d0b478; border: 1px solid rgba(208, 180, 120, 0.4); background: rgba(208, 180, 120, 0.07); }
.oss-desc { font-size: 15px; color: rgba(232, 224, 205, 0.78); line-height: 1.75; max-width: 760px; }
.oss-meta { font-family: var(--mono); font-size: 12px; letter-spacing: 0.1em; color: rgba(232, 224, 205, 0.42); }
.oss-arrow {
  font-family: var(--serif); font-size: 34px; color: rgba(232, 224, 205, 0.4);
  text-align: right; transition: color .25s, transform .25s;
}
a.oss-row:hover .oss-arrow { color: #d08770; transform: translate(4px, -4px); }
.oss-row.private { opacity: 0.72; }
.oss-row.private .oss-num { color: #d0b478; border-color: rgba(208, 180, 120, 0.4); }
.oss-row.private .oss-arrow {
  font-size: 22px; border: 1.5px solid rgba(208, 180, 120, 0.55); border-radius: 6px;
  width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
  margin-left: auto; transform: rotate(3deg); color: #d0b478;
}

.gh-banner {
  margin-top: 54px; display: flex; align-items: center; justify-content: space-between; gap: 28px;
  border: 1px solid rgba(232, 224, 205, 0.22); border-radius: 8px;
  padding: 30px 34px; text-decoration: none; color: var(--night-ink);
  background:
    radial-gradient(ellipse at 85% 20%, rgba(166, 58, 40, 0.16), transparent 60%),
    rgba(232, 224, 205, 0.025);
  transition: border-color .25s, transform .25s;
}
.gh-banner:hover { border-color: rgba(208, 135, 112, 0.6); transform: translateY(-2px); }
.gh-text { display: flex; flex-direction: column; gap: 8px; }
.gh-text b { font-size: 21px; font-weight: 700; }
.gh-sub { font-family: var(--mono); font-size: 12.5px; letter-spacing: 0.1em; color: rgba(232, 224, 205, 0.55); }
.gh-handle { font-family: var(--mono); font-size: 16px; letter-spacing: 0.02em; color: rgba(232, 224, 205, 0.85); white-space: nowrap; }
.gh-handle b { color: #d08770; font-weight: 700; }

/* ── 关于 ─────────────────────────────────────────────────────── */
.about-grid { display: grid; grid-template-columns: 1fr 340px; gap: 64px; }
.about-lead { color: var(--ink-soft); margin-top: 20px; font-size: 16.5px; }
.about-facts { list-style: none; margin-top: 28px; border-top: 1px solid var(--hairline); }
.about-facts li { display: flex; gap: 18px; padding: 13px 0; border-bottom: 1px solid var(--hairline); align-items: baseline; }
.about-facts b { font-family: var(--mono); font-size: 12px; letter-spacing: 0.14em; min-width: 64px; color: var(--vermillion); text-transform: uppercase; }
.about-facts span { color: var(--ink-soft); font-size: 15px; }

.quote-card {
  background: var(--card); border: 1px solid var(--hairline); border-radius: 6px;
  padding: 34px 30px 30px; position: relative;
  box-shadow: 0 24px 50px -40px rgba(28, 25, 20, 0.55);
}
.quote-seal {
  position: absolute; top: -18px; right: 22px; width: 40px; height: 40px;
  background: var(--vermillion); color: #f5ede0; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-size: 19px; font-weight: 700;
  box-shadow: 0 6px 16px -8px rgba(140, 47, 31, .8);
  transform: rotate(3deg);
}
.quote-zh { font-size: 21px; font-weight: 700; line-height: 1.9; }
.quote-src { margin-top: 12px; font-size: 13px; color: var(--ink-faint); letter-spacing: 0.1em; }
.quote-en { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--hairline); font-style: italic; color: var(--gold); font-size: 14.5px; line-height: 1.7; }
.about-contact { margin-top: 30px; }
.contact-label { font-family: var(--mono); font-size: 12px; letter-spacing: 0.28em; color: var(--ink-faint); text-transform: uppercase; }
.contact-line { display: block; font-size: 17px; margin-top: 10px; color: var(--ink); text-decoration: none; border-bottom: 1px solid var(--hairline-strong); padding-bottom: 3px; width: fit-content; }
.contact-line:hover { color: var(--vermillion); border-color: var(--vermillion); }
.contact-note { margin-top: 12px; font-size: 13.5px; color: var(--ink-faint); }

/* ── 页脚 ─────────────────────────────────────────────────────── */
.site-footer { border-top: 1px solid var(--hairline); padding: 34px 0 44px; background: var(--paper-deep); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--ink-soft); }
.footer-nav { display: flex; gap: 22px; }
.footer-nav a { font-size: 14px; color: var(--ink-soft); text-decoration: none; }
.footer-nav a:hover { color: var(--vermillion); }
.footer-note { font-size: 13px; color: var(--ink-faint); }

/* ── 浮出动画 ─────────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ── toast ────────────────────────────────────────────────────── */
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 20px);
  background: var(--ink); color: var(--paper); font-size: 14.5px;
  padding: 12px 26px; border-radius: 4px; opacity: 0; pointer-events: none;
  transition: all .35s ease; z-index: 100; max-width: 88vw; text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ── 法务页 ───────────────────────────────────────────────────── */
.legal { padding: 72px 0 90px; }
.legal h1 { font-size: 34px; margin: 10px 0 34px; }
.legal h2 { font-size: 20px; margin: 34px 0 10px; }
.legal p, .legal li { color: var(--ink-soft); font-size: 15.5px; max-width: 760px; }
.legal ul { padding-left: 22px; margin-top: 8px; }
.legal .updated { font-family: var(--mono); font-size: 12.5px; color: var(--ink-faint); letter-spacing: 0.1em; }
.legal a { color: var(--vermillion); }

/* ── 成功页 ───────────────────────────────────────────────────── */
.success-wrap { max-width: 620px; margin: 0 auto; padding: 90px 28px; text-align: center; }
.success-seal { width: 64px; height: 64px; margin: 0 auto 22px; border-radius: 8px; background: var(--vermillion); color: #f5ede0; display: flex; align-items: center; justify-content: center; font-size: 30px; font-weight: 700; }
.success-wrap h1 { font-size: 30px; margin-bottom: 10px; }
.success-wrap .en-sub { color: var(--gold); font-style: italic; margin-bottom: 26px; }
.secret-box {
  background: var(--night); color: #9fd6ae; border-radius: 8px;
  font-family: var(--mono); font-size: 20px; letter-spacing: 0.08em;
  padding: 22px; margin: 26px auto; max-width: 480px; word-break: break-all;
}
.secret-hint { font-size: 14px; color: var(--ink-faint); }
.spinner { display: inline-block; width: 26px; height: 26px; border: 2.5px solid var(--hairline-strong); border-top-color: var(--vermillion); border-radius: 50%; animation: spin 0.9s linear infinite; margin: 26px auto; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ── 响应式 ───────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-side { flex-direction: row; padding: 10px 0 0; gap: 40px; }
  .vertical-text { min-height: 0; writing-mode: horizontal-tb; border-left: none; padding-left: 0; font-size: 16px; letter-spacing: 0.3em; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .stat { padding: 18px 4px 20px; }
  .stat:nth-child(odd) { border-left: none; padding-left: 0; }
  .work-card { grid-template-columns: 1fr; }
  .work-visual { min-height: 170px; border-right: none; border-bottom: 1px solid var(--hairline); }
  .ticker { transform: none; }
  .about-grid { grid-template-columns: 1fr; gap: 44px; }
  .work-body { padding: 30px 24px 34px; }
  .oss-row { grid-template-columns: 1fr; gap: 14px; padding: 26px 2px; }
  .oss-arrow { display: none; }
  .oss-name { font-size: 20px; }
  .gh-banner { flex-direction: column; align-items: flex-start; padding: 26px 24px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .site-nav { gap: 16px; }
  .site-nav a { font-size: 14px; }
  .brand-name i { display: none; }
  .hero { padding-top: 64px; }
  .oss-num { width: 44px; height: 44px; font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01s !important; transition-duration: 0.01s !important; }
  .reveal { opacity: 1; transform: none; }
}