/* ==========================================================================
   dsh-ufo —— ufo.huoyue.club
   一页。不需要滚动也知道这是什么，滚下去只有名录。
   ========================================================================== */

:root {
  --bg: #04060a;
  --text: #e8eef8;
  --text-dim: #8e99ad;
  --text-mute: #5a6377;
  --accent: #2997ff;
  --accent-rgb: 41, 151, 255;
  --line: rgba(255, 255, 255, 0.08);

  --maxw: 1080px;
  --gutter: 28px;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC",
    sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", "Courier New", monospace;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1,
h2 {
  margin: 0;
  font-weight: 600;
}

p {
  margin: 0;
}

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

code {
  font-family: var(--font-mono);
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* --------------------------------------------------------------- topbar */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 20;
  padding: 22px 0;
  pointer-events: none;
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: auto;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  color: rgba(232, 238, 248, 0.72);
  transition: color 0.25s var(--ease);
}

.brand:hover {
  color: var(--text);
}

.topbar__gh {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: rgba(232, 238, 248, 0.45);
  transition: color 0.25s var(--ease);
}

.topbar__gh:hover {
  color: var(--text);
}

/* ------------------------------------------------------------ 门（首屏） */
.gate {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100svh;
  padding: 130px 0 90px;
  overflow: hidden;
}

/* 星场：用平铺的点，不画图也不上 canvas */
.gate__stars {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 28px 34px, rgba(255, 255, 255, 0.42), transparent),
    radial-gradient(1px 1px at 122px 96px, rgba(255, 255, 255, 0.22), transparent),
    radial-gradient(1.5px 1.5px at 188px 152px, rgba(255, 255, 255, 0.3), transparent),
    radial-gradient(1px 1px at 66px 196px, rgba(255, 255, 255, 0.16), transparent),
    radial-gradient(1px 1px at 216px 58px, rgba(255, 255, 255, 0.24), transparent);
  background-size: 260px 260px;
  opacity: 0.75;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 8%, rgba(0, 0, 0, 0.45) 62%, transparent 96%);
  mask-image: linear-gradient(180deg, #000 8%, rgba(0, 0, 0, 0.45) 62%, transparent 96%);
}

/* 地平线：一个极大的圆，只露出最顶上那一小段弧。
   半径要远大于容器宽度，弧才会是“缓缓压下来”，而不是一顶帽子。 */
.gate__horizon {
  position: absolute;
  left: 50%;
  top: calc(100% - 64px);
  width: 460vw;
  aspect-ratio: 1;
  transform: translateX(-50%);
  border-radius: 50%;
  box-shadow:
    inset 0 1px 0 rgba(var(--accent-rgb), 0.4),
    inset 0 120px 180px -100px rgba(var(--accent-rgb), 0.2);
  pointer-events: none;
}

.gate__inner {
  position: relative;
  z-index: 1;
}

.gate__kicker {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.34em;
  color: rgba(var(--accent-rgb), 0.85);
}

.gate h1 {
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(3.6rem, 13vw, 8.6rem);
  font-weight: 500;
  line-height: 0.94;
  letter-spacing: -0.045em;
  color: #f4f8ff;
  text-shadow: 0 0 90px rgba(var(--accent-rgb), 0.28);
}

.gate__quote {
  margin-top: clamp(34px, 5vw, 58px);
  /* 换行由 HTML 里的 <br> 决定；不再设 max-width，
     否则中文字宽远大于 1ch，最后一行会被挤断成孤字 */
  font-size: clamp(1.02rem, 2.1vw, 1.4rem);
  line-height: 2.1;
  color: #b7c3d6;
}

/* 入口：两行就够。上面一行是怎么进，下面一行是把什么装上。
   不加小标题、不加步骤编号、不写重启之类 —— 那是文档的事。 */
.gate__enter {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-top: clamp(46px, 7vw, 84px);
}

.cadence {
  position: relative;
  flex: none;
  width: 64px;
  height: 1px;
  margin-top: 0.9em;
  background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), 0.75));
}

.cadence::after {
  content: "";
  position: absolute;
  right: -3px;
  top: -2.5px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(var(--accent-rgb), 0.95);
  box-shadow: 0 0 14px 3px rgba(var(--accent-rgb), 0.45);
  animation: pulse 3.4s var(--ease) infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.35;
  }
  50% {
    opacity: 1;
  }
}

.enter {
  min-width: 0;
}

.enter__row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
}

.enter__row + .enter__row {
  margin-top: 14px;
}

.enter__slash {
  font-size: clamp(0.98rem, 1.8vw, 1.12rem);
  letter-spacing: 0.04em;
  color: rgba(232, 238, 248, 0.9);
}

.enter__cmd {
  min-width: 0;
  font-size: 0.78rem;
  letter-spacing: 0.01em;
  color: rgba(142, 153, 173, 0.92);
  word-break: break-all;
  cursor: pointer;
  transition: color 0.2s var(--ease);
}

.enter__cmd:hover {
  color: rgba(232, 238, 248, 0.8);
}

/* 点一下复制：不弹提示、不换文案，只是短暂亮一下 */
.enter__cmd.is-copied {
  color: rgba(var(--accent-rgb), 0.95);
}

/* 复制反馈：贴在底部的细条，出现 1.5 秒后自己走。
   不用对话框、不遮内容、也不拦点击。 */
.toast {
  position: fixed;
  left: 50%;
  bottom: 46px;
  z-index: 60;
  padding: 8px 17px;
  border: 1px solid rgba(var(--accent-rgb), 0.45);
  border-radius: 999px;
  background: rgba(7, 12, 20, 0.94);
  color: rgba(var(--accent-rgb), 0.96);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
  opacity: 0;
  transform: translate(-50%, 8px);
  transition: opacity 0.22s var(--ease), transform 0.22s var(--ease);
  pointer-events: none;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 30px -12px rgba(var(--accent-rgb), 0.5);
}

.toast.is-on {
  opacity: 1;
  transform: translate(-50%, 0);
}

/* ------------------------------------------------------------------ 引 */
.lede {
  padding: clamp(96px, 15vw, 190px) 0;
  border-top: 1px solid var(--line);
}

.lede__big {
  font-size: clamp(1.9rem, 5.4vw, 3.6rem);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -0.03em;
  color: #eef3fb;
}

.lede__small {
  margin-top: clamp(22px, 3.4vw, 38px);
  /* 断行位置由 <br> 决定；中文字宽不等于 1ch，用 ch 设宽会断在词中间 */
  font-size: clamp(0.98rem, 2vw, 1.18rem);
  line-height: 2.05;
  color: var(--text-dim);
}

/* ------------------------------------------------------------------ 案 */
.archives {
  padding: clamp(80px, 12vw, 150px) 0 clamp(90px, 13vw, 170px);
  border-top: 1px solid var(--line);
}

.archives__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 400;
  letter-spacing: 0.34em;
  color: var(--text-mute);
  margin-bottom: clamp(38px, 6vw, 68px);
}

.ledger {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: ledger;
}

.ledger li {
  display: grid;
  grid-template-columns: minmax(0, 15ch) minmax(0, 1fr);
  gap: 10px 28px;
  align-items: baseline;
  padding: clamp(14px, 2vw, 21px) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.055);
  counter-increment: ledger;
}

.ledger li::before {
  content: counter(ledger, decimal-leading-zero);
  display: none;
}

.ledger__name {
  font-family: var(--font-mono);
  font-size: clamp(0.88rem, 1.7vw, 1.02rem);
  letter-spacing: 0.01em;
  color: #d9e2f1;
}

.ledger__note {
  font-size: clamp(0.84rem, 1.6vw, 0.95rem);
  color: var(--text-mute);
  letter-spacing: 0.01em;
}

.ledger li:last-child {
  border-bottom: 1px solid rgba(255, 255, 255, 0.055);
}

/* 官方与民间之间留一道空行，不写说明 */
.ledger__sep {
  border-top: 0;
  height: clamp(22px, 3.4vw, 40px);
  padding: 0;
}

/* ------------------------------------------------------------------ 尾 */
.closing {
  padding: clamp(80px, 12vw, 150px) 0 clamp(104px, 15vw, 190px);
  border-top: 1px solid var(--line);
}

.closing p {
  font-size: clamp(1.05rem, 2.4vw, 1.42rem);
  line-height: 2;
  color: #8f9bb0;
  font-style: italic;
}

/* -------------------------------------------------------------- footer */
.footer {
  padding: 0 0 clamp(34px, 5vw, 54px);
}

.footer__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--text-mute);
}

.footer__dot {
  opacity: 0.45;
}

.footer__link {
  margin-left: auto;
  color: var(--text-mute);
  transition: color 0.25s var(--ease);
}

.footer__link:hover {
  color: var(--text-dim);
}

/* ---------------------------------------------------------- responsive */
@media (max-width: 720px) {
  :root {
    --gutter: 22px;
  }

  .gate {
    min-height: 92svh;
    padding: 110px 0 70px;
  }

  .gate__quote {
    max-width: none;
    line-height: 1.95;
  }

  /* 窄屏上那根线和命令都收一档，否则命令会顶到右边缘 */
  .cadence {
    width: 40px;
  }

  .enter__cmd {
    font-size: 0.72rem;
  }

  .ledger li {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .footer__link {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cadence::after {
    animation: none;
  }
}