/* ==========================================================
   玄锋 · 静观其上 —— 极简版（全居中排版）
   单文件样式：无外部依赖、无外网请求
   改主色：只改下面 --gold / --gold-dim
   改宽度：改 --maxw（正文栏宽）与 --measure（段落行长）
   ========================================================== */

:root {
  --bg: #0b0b0c;
  --bg-soft: #101012;
  --line: rgba(255, 255, 255, 0.09);
  --line-strong: rgba(255, 255, 255, 0.18);
  --ink: #ececea;
  --ink-dim: #9a9a97;
  --ink-faint: #6a6a68;
  --gold: #c9a961;
  --gold-dim: #8c7440;

  --serif: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --mono: "Cascadia Code", "SF Mono", Consolas, "Courier New", monospace;

  --maxw: 760px;
  --measure: 33em;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body { max-width: 100%; overflow-x: hidden; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: 0.02em;
  text-align: center;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(201, 169, 97, 0.07), transparent 70%),
    radial-gradient(800px 400px at 100% 100%, rgba(255, 255, 255, 0.03), transparent 70%);
  z-index: 0;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

a { color: inherit; text-decoration: none; }

/* ---------- 导航（整条居中） ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: rgba(11, 11, 12, 0.72);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 44px;
  height: 58px;
  position: relative;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--serif);
  font-size: 17px;
  letter-spacing: 0.24em;
  color: var(--ink);
}

.seal {
  width: 9px;
  height: 9px;
  border: 1px solid var(--gold);
  transform: rotate(45deg);
  display: inline-block;
  transition: background 0.4s var(--ease);
}

.brand:hover .seal { background: var(--gold); }

.links { display: flex; gap: 26px; }

.links a {
  font-size: 13.5px;
  letter-spacing: 0.16em;
  color: var(--ink-dim);
  position: relative;
  padding: 4px 0;
  transition: color 0.3s var(--ease);
}

.links a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.35s var(--ease);
}

.links a:hover { color: var(--ink); }
.links a:hover::after { width: 100%; }

.menu-btn {
  display: none;
  background: none;
  border: 0;
  color: var(--ink-dim);
  font-size: 18px;
  cursor: pointer;
  padding: 6px;
}

/* ---------- 首屏 ---------- */
.hero { padding: 118px 0 96px; }

.hero-sigil {
  margin: 0 0 34px;
  font-size: 12.5px;
  letter-spacing: 0.42em;
  color: var(--gold);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.hero-sigil::before,
.hero-sigil::after {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--gold-dim);
}

.hero h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(44px, 9vw, 76px);
  line-height: 1.12;
  letter-spacing: 0.14em;
}

.hero h1 .thin {
  display: block;
  margin-top: 12px;
  font-size: clamp(15px, 3.2vw, 19px);
  letter-spacing: 0.52em;
  color: var(--ink-dim);
}

.hero-lede {
  margin: 40px auto 0;
  max-width: 30em;
  color: var(--ink-dim);
}

.hero-rule {
  width: 48px;
  height: 1px;
  background: var(--gold-dim);
  margin: 44px auto 0;
}

.hero-links {
  margin-top: 44px;
  display: flex;
  justify-content: center;
  gap: 28px;
  font-size: 13.5px;
  letter-spacing: 0.14em;
}

.hero-links a {
  color: var(--ink-dim);
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 3px;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.hero-links a:hover { color: var(--gold); border-color: var(--gold); }

/* ---------- 八术同盘 入口按钮 ---------- */
.hero-entry {
  margin-top: 46px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 13px;
}

.entry-btn {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  padding: 12px 26px;
  border: 1px solid var(--gold-dim);
  background: rgba(201, 169, 97, 0.05);
  color: var(--gold);
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: 0.26em;
  padding-left: calc(26px + 0.26em); /* 补掉末字后的字距，视觉才真正居中 */
  transition: border-color 0.35s var(--ease), background 0.35s var(--ease),
              color 0.35s var(--ease), transform 0.35s var(--ease);
}

.entry-btn .entry-seal {
  width: 7px;
  height: 7px;
  border: 1px solid currentColor;
  transform: rotate(45deg);
  display: inline-block;
  transition: background 0.4s var(--ease);
}

.entry-btn .entry-go {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0;
  color: var(--gold-dim);
  transition: color 0.35s var(--ease);
}

.entry-btn:hover {
  border-color: var(--gold);
  background: rgba(201, 169, 97, 0.14);
  color: #f5e9cb;
  transform: translateY(-1px);
}

.entry-btn:active { transform: translateY(0); }
.entry-btn:hover .entry-seal { background: var(--gold); }
.entry-btn:hover .entry-go { color: var(--gold); }

.entry-note {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  line-height: 1.6;
}

/* ---------- 章节 ---------- */
.section {
  padding: 76px 0;
  border-top: 1px solid var(--line);
}

.sec-head {
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.sec-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.1em;
}

.sec-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 25px;
  letter-spacing: 0.22em;
}

.sec-title-en {
  font-size: 11px;
  letter-spacing: 0.34em;
  text-transform: uppercase;
  color: var(--ink-faint);
}

/* ---------- 自述 ---------- */
.about p {
  margin: 0 auto 22px;
  max-width: var(--measure);
  color: #d5d5d2;
}

.about p:last-child { margin-bottom: 0; }

.about em {
  font-style: normal;
  color: var(--gold);
  border-bottom: 1px solid rgba(201, 169, 97, 0.34);
  padding-bottom: 1px;
}

/* ---------- 造物 ---------- */
.works {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.work {
  background: var(--bg);
  padding: 30px 26px 32px;
  min-width: 0;
  transition: background 0.35s var(--ease);
}

.work:hover { background: var(--bg-soft); }

.work h3 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 19px;
  letter-spacing: 0.08em;
}

.work .stack {
  display: block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
}

.work .desc {
  margin: 14px auto 0;
  max-width: 30em;
  color: var(--ink-dim);
  font-size: 14.5px;
  line-height: 1.75;
}

/* 可点的造物卡（八术同盘） */
.work-link { display: block; }

.work-link .go {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--gold-dim);
  vertical-align: 0.1em;
  transition: color 0.3s var(--ease), transform 0.3s var(--ease);
  display: inline-block;
}

.work-link:hover h3 { color: var(--gold); }
.work-link:hover .go { color: var(--gold); transform: translate(2px, -2px); }

.work h3 { transition: color 0.3s var(--ease); }

/* ---------- 技 ---------- */
.craft { display: grid; gap: 22px; margin: 0; }

.craft-row {
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.craft-row:last-child { border-bottom: 0; padding-bottom: 0; }

.craft-row dt {
  font-size: 12.5px;
  letter-spacing: 0.3em;
  color: var(--ink-faint);
  margin-bottom: 12px;
}

.craft-row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.tag {
  font-family: var(--mono);
  font-size: 12.5px;
  color: #cfcfcb;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 3px 12px;
  letter-spacing: 0.04em;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.tag:hover { border-color: var(--gold-dim); color: var(--ink); }

/* ---------- 相通 ---------- */
.reach { display: grid; gap: 0; }

.reach-line {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.reach-line:last-child { border-bottom: 0; }

.reach-line .k {
  font-size: 12px;
  letter-spacing: 0.28em;
  color: var(--ink-faint);
}

.reach-line .v { color: #d5d5d2; }

.reach-line a.v {
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 2px;
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.reach-line a.v:hover { color: var(--gold); border-color: var(--gold); }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 46px 0 60px;
}

.footer-mark {
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.5em;
  color: var(--gold-dim);
  margin-bottom: 14px;
  padding-left: 0.5em; /* 补掉末字后的字距，视觉才真正居中 */
}

.footer p {
  margin: 4px 0;
  font-size: 12.5px;
  color: var(--ink-faint);
  letter-spacing: 0.1em;
}

.footer-icp {
  margin-top: 14px !important;
  font-size: 11.5px !important;
  letter-spacing: 0.04em !important;
}

.footer-icp a {
  color: var(--ink-dim);
  border-bottom: 1px solid var(--line);
  transition: color .2s ease, border-color .2s ease;
}

.footer-icp a:hover {
  color: var(--ink);
  border-bottom-color: var(--gold-dim);
}

/* ---------- 滚动淡入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}

.reveal.in { opacity: 1; transform: none; }

/* ---------- 响应式 ---------- */
@media (max-width: 620px) {
  .wrap { padding: 0 20px; }
  .hero { padding: 84px 0 64px; }
  .section { padding: 56px 0; }
  .nav-inner { gap: 0; }
  .menu-btn {
    display: block;
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
  }
  .links {
    position: absolute;
    top: 58px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(11, 11, 12, 0.98);
    border-bottom: 1px solid var(--line);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease);
    text-align: center;
  }
  .links.open { max-height: 300px; }
  .links a { padding: 14px 20px; border-top: 1px solid var(--line); }
  .links a::after { display: none; }
  .sec-title-en { display: none; }
  .work { padding: 26px 18px 28px; }
  .craft-row { padding-bottom: 18px; }
  .about p, .work .desc { max-width: 100%; }
}