/* Limitlm 个人引导页 — 极简线条 */

@font-face {
  font-family: "Pacifico";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("assets/pacifico-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

:root {
  color-scheme: dark;
  --ink: #ffffff;
  --ink-soft: rgba(255, 255, 255, 0.94);
  --ink-mute: rgba(255, 255, 255, 0.64);
  --line: rgba(255, 255, 255, 0.78);
  --line-soft: rgba(255, 255, 255, 0.34);
  --panel-hover: rgba(255, 255, 255, 0.16);
  --shadow: rgba(0, 0, 0, 0.4);

  /* 遮罩：中心略压暗保证可读，边缘尽量透出背景 */
  --scrim-base: radial-gradient(
    ellipse 72% 58% at 50% 42%,
    rgba(8, 10, 16, 0.48) 0%,
    rgba(8, 10, 16, 0.30) 50%,
    rgba(8, 10, 16, 0.14) 78%,
    rgba(8, 10, 16, 0.10) 100%
  );
  --scrim-adaptive: rgba(0, 0, 0, 0.10);
  --btn-bg: rgba(255, 255, 255, 0.08);
  --text-shadow: 0 0 8px rgba(0, 0, 0, 0.85), 0 1px 3px rgba(0, 0, 0, 0.75),
    0 2px 18px rgba(0, 0, 0, 0.55);

  /* 中文走系统字体栈，不拉第三方 webfont */
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC",
    system-ui, -apple-system, sans-serif;
  --font-display: Pacifico, "Segoe Print", "Bradley Hand", cursive;

  --space-1: 8px;
  --space-2: 16px;
  --space-4: 32px;
  --space-5: 48px;

  --avatar-size: 112px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-fast: 180ms;
  --dur-mid: 280ms;
  --dur-open: 1100ms;

  --content-max: 980px;
  --footer-h: 118px;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: #1a1c22;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* 背景：双层交叉淡入；远程优先，失败/超时用本地 */
.bg-stack {
  position: fixed;
  inset: 0;
  z-index: 0;
  background-color: #1a1c22;
  overflow: hidden;
}

.bg-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  transform: scale(1.02);
  opacity: 0;
  transition: opacity 600ms ease;
}

.bg-layer.is-visible {
  opacity: 1;
}

.scrim {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.scrim-base,
.scrim-adaptive {
  position: absolute;
  inset: 0;
}

.scrim-base {
  background: var(--scrim-base);
}

.scrim-adaptive {
  background: var(--scrim-adaptive);
  mix-blend-mode: multiply;
}

.page {
  position: relative;
  z-index: 2;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  /* safe center：内容装得下时居中，溢出时退化为顶部起排，避免顶进固定 footer */
  justify-content: center;
  justify-content: safe center;
  padding: var(--space-4) var(--space-2) calc(var(--footer-h) + var(--space-2));
}

/* 主舞台：头像 — 简介 — 站点 */
.stage {
  width: min(100%, var(--content-max));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.section {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ---------- 1. 头像 / 3. 站点（开场同步位移） ---------- */
.section-avatar,
.section-sites {
  position: relative;
  z-index: 2;
  transition: transform var(--dur-open) var(--ease-out);
}

.avatar-link {
  display: block;
  border-radius: 50%;
  outline: none;
  text-decoration: none;
  transition: transform var(--dur-mid) var(--ease-out);
}

.avatar-link:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 4px;
}

.avatar {
  display: block;
  width: var(--avatar-size);
  height: var(--avatar-size);
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid rgba(255, 255, 255, 0.85);
  box-shadow: 0 8px 28px var(--shadow);
  background: rgba(255, 255, 255, 0.08);
  transition:
    transform var(--dur-mid) var(--ease-out),
    border-color var(--dur-mid) var(--ease-out),
    box-shadow var(--dur-mid) var(--ease-out);
}

.avatar-link:hover .avatar,
.avatar-link:focus-visible .avatar {
  transform: scale(1.06);
  border-color: #fff;
  box-shadow:
    0 12px 36px var(--shadow),
    0 0 0 6px rgba(255, 255, 255, 0.08);
}

/* 竖向脊线：两端渐隐 + 中点节点，作为结构签名 */
.v-rule {
  position: relative;
  width: 1px;
  height: var(--space-5);
  background: linear-gradient(
    to bottom,
    transparent 0%,
    var(--line-soft) 18%,
    var(--line-soft) 82%,
    transparent 100%
  );
  flex-shrink: 0;
  transform-origin: top center;
  transform: scaleY(0);
  opacity: 0;
  transition:
    transform var(--dur-open) var(--ease-out),
    opacity var(--dur-open) var(--ease-out);
}

.v-rule::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--line);
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.35);
  transform: translate(-50%, -50%) scale(0);
  transition: transform 500ms var(--ease-out) 300ms;
}

body.is-ready .v-rule-1,
body.is-ready .v-rule-2 {
  transform: scaleY(1);
  opacity: 1;
}

body.is-ready .v-rule-2 {
  transition-delay: 90ms;
}

body.is-ready .v-rule::after {
  transform: translate(-50%, -50%) scale(1);
}

/* 站点分组之间的短脊线：比段落间略短，保留两端渐隐 */
.v-rule-sites {
  height: 40px;
}

body.is-ready .v-rule-sites {
  transform: scaleY(1);
  opacity: 1;
  transition-delay: 180ms;
}

body.is-ready .v-rule-sites::after {
  transition-delay: 480ms;
}

/* ---------- 2. 简介（预留高度，避免 CLS） ---------- */
.section-bio {
  width: 100%;
  max-width: 720px;
  opacity: 0;
  margin: var(--space-2) 0;
  transition: opacity calc(var(--dur-open) * 0.75) var(--ease-out);
}

.section-bio.is-open {
  opacity: 1;
}

.bio-inner {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
}

.h-rule {
  width: min(100%, 520px);
  height: 1px;
  background: linear-gradient(
    to right,
    transparent 0%,
    var(--line) 12%,
    var(--line) 88%,
    transparent 100%
  );
  transform-origin: center;
  transform: scaleX(0);
  transition: transform var(--dur-open) var(--ease-out) 120ms;
}

.section-bio.is-open .h-rule {
  transform: scaleX(1);
}

.name {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(32px, 6vw, 44px);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--ink);
  text-shadow: var(--text-shadow);
  line-height: 1.25;
  opacity: 0;
  transform: translateY(var(--space-1));
  transition:
    opacity 500ms var(--ease-out) 200ms,
    transform 500ms var(--ease-out) 200ms;
}

.section-bio.is-open .name {
  opacity: 1;
  transform: translateY(0);
}

.tagline {
  margin: 0;
  min-height: 1.5em;
  font-size: clamp(13px, 2.4vw, 15px);
  letter-spacing: 0.14em;
  color: var(--ink-soft);
  text-shadow: var(--text-shadow);
  line-height: 1.5;
}

.caret {
  display: inline-block;
  width: 1px;
  height: 1em;
  margin-left: 2px;
  vertical-align: -0.1em;
  background: var(--ink-soft);
  opacity: 0;
}

.caret.is-on {
  opacity: 1;
  animation: blink 1s steps(1) infinite;
}

@keyframes blink {
  0%,
  49% {
    opacity: 1;
  }
  50%,
  100% {
    opacity: 0;
  }
}

/* ---------- 3. 站点按钮 ---------- */
.sites-wrap {
  width: 100%;
  min-height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.site-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  width: 100%;
  /* 外框只画左/上，右/下由单元格补全，多行也是完整一块 */
  border-top: 1px solid rgba(255, 255, 255, 0.28);
  border-left: 1px solid rgba(255, 255, 255, 0.28);
  /* 整行一次模糊，避免每个链接各自开 backdrop-filter 合成层 */
  backdrop-filter: blur(6px) saturate(140%);
  -webkit-backdrop-filter: blur(6px) saturate(140%);
}

.site-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.7em 1.15em;
  margin: 0;
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 14px;
  letter-spacing: 0.12em;
  border: none;
  border-right: 1px solid rgba(255, 255, 255, 0.28);
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
  background: var(--btn-bg);
  text-shadow: var(--text-shadow);
  transition:
    color var(--dur-fast) ease,
    background-color var(--dur-fast) ease,
    box-shadow var(--dur-fast) ease,
    transform var(--dur-fast) var(--ease-out);
  white-space: nowrap;
  /* 自然换行铺满：同行均分宽度，末行也拉满，不出现缺角 */
  flex: 1 1 auto;
  min-width: max-content;
}

.site-link:hover,
.site-link:focus-visible {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.9);
  z-index: 1;
  position: relative;
}

.site-link:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

.site-link:active {
  transform: scale(0.98);
}

/* 常用站：字号更小、文字更淡，与个人站拉开主次 */
.site-row-common .site-link {
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 0.55em 0.95em;
  color: var(--ink-mute);
  background: rgba(255, 255, 255, 0.04);
}

.site-row-common .site-link:hover,
.site-row-common .site-link:focus-visible {
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.12);
}

/* 开场编排：先并拢，后上下分开 */
body.is-preopen .section-avatar {
  transform: translateY(36px);
}

body.is-preopen .section-sites {
  transform: translateY(-28px);
}

body.is-ready .section-avatar,
body.is-ready .section-sites {
  transform: translateY(0);
}

/* ---------- 4. Footer ---------- */
.footer {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-2) var(--space-2);
  pointer-events: none;
}

.footer > * {
  pointer-events: auto;
}

.copyright {
  text-align: center;
}

.copy-line {
  margin: 0.15em 0;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--ink-mute);
  text-transform: uppercase;
  text-shadow: var(--text-shadow);
}

.copy-line a {
  color: inherit;
  text-decoration: none;
}

.copy-line a:hover,
.copy-line a:focus-visible {
  color: var(--ink-soft);
}

.socials {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.social-btn {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--line-soft);
  cursor: pointer;
  text-decoration: none;
  padding: 0;
  font: inherit;
  transition:
    color var(--dur-fast) ease,
    border-color var(--dur-fast) ease,
    background-color var(--dur-fast) ease,
    transform var(--dur-fast) var(--ease-out);
}

.social-btn:hover,
.social-btn:focus-visible {
  color: var(--ink);
  border-color: rgba(255, 255, 255, 0.9);
  background: var(--panel-hover);
  transform: translateY(-2px);
}

.social-btn:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
}

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--footer-h) + var(--space-1));
  transform: translateX(-50%) translateY(var(--space-1));
  z-index: 20;
  padding: 10px var(--space-2);
  border-radius: 999px;
  border: 1px solid var(--line-soft);
  background: rgba(20, 22, 28, 0.78);
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.08em;
  opacity: 0;
  pointer-events: none;
  transition:
    opacity 200ms ease,
    transform 200ms var(--ease-out);
}

.toast.is-show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 768px) {
  :root {
    --avatar-size: 96px;
    --footer-h: 100px;
  }

  .page {
    padding-top: var(--space-5);
    padding-bottom: calc(var(--footer-h) + var(--space-1));
  }

  .name {
    font-size: clamp(30px, 8vw, 38px);
    letter-spacing: 0.04em;
  }

  .site-link {
    font-size: 13px;
    letter-spacing: 0.08em;
    padding: 0.75em 0.95em;
  }

  .site-row-common .site-link {
    font-size: 11px;
    padding: 0.55em 0.75em;
  }

  .footer {
    gap: var(--space-1);
    padding: 10px var(--space-2) var(--space-1);
  }

  .copy-line {
    font-size: 10px;
    letter-spacing: 0.12em;
    margin: 0.1em 0;
  }

  .socials {
    gap: var(--space-1);
  }

  .social-btn {
    width: 44px;
    height: 44px;
    border-color: rgba(255, 255, 255, 0.22);
  }
}

@media (max-width: 420px) {
  :root {
    --avatar-size: 84px;
  }
}

/* ---------- 无障碍：减少动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .section-bio {
    opacity: 1;
  }

  .h-rule {
    transform: scaleX(1);
  }

  .name {
    opacity: 1;
    transform: none;
  }

  .caret {
    display: none;
  }

  .v-rule::after {
    transform: translate(-50%, -50%) scale(1);
    transition: none;
  }

  .bg-layer {
    transition: none;
  }

  body.is-preopen .section-avatar,
  body.is-preopen .section-sites {
    transform: none;
  }
}