/* ==========================================================
   博君一肖 · 双人应援站
   零外部依赖：无 CDN、无外部字体、无框架
   双色体系：王一博 = 竹青绿 / 肖战 = 朱砂红
   ========================================================== */

:root {
  /* 基础 */
  --bg: #fbfaf7;
  --bg-soft: #f4f2ec;
  --bg-card: #ffffff;
  --fg: #1a1917;
  --fg-soft: #3d3a35;
  --muted: #78736a;
  --line: #e6e2d9;
  --line-soft: #f0ede5;

  /* 双人色 */
  --wyb: #2e6f57;
  --wyb-bright: #4fbf96;
  --wyb-soft: rgba(46, 111, 87, 0.09);
  --wyb-glow: rgba(79, 191, 150, 0.22);

  --xz: #b8382f;
  --xz-bright: #de5a4c;
  --xz-soft: rgba(184, 56, 47, 0.08);
  --xz-glow: rgba(222, 90, 76, 0.2);

  --gold: #a8853f;
  --gold-soft: rgba(168, 133, 63, 0.1);

  --radius: 4px;
  --radius-lg: 10px;
  --maxw: 760px;
  --wide: 1000px;

  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif CJK SC",
    "SimSun", Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131211;
    --bg-soft: #1b1a17;
    --bg-card: #191816;
    --fg: #ece8df;
    --fg-soft: #c4bfb4;
    --muted: #8e887c;
    --line: #2b2925;
    --line-soft: #232019;

    --wyb: #57c49c;
    --wyb-bright: #6fdcb2;
    --wyb-soft: rgba(87, 196, 156, 0.11);
    --wyb-glow: rgba(60, 180, 140, 0.16);

    --xz: #e5756a;
    --xz-bright: #f08b7f;
    --xz-soft: rgba(229, 117, 106, 0.1);
    --xz-glow: rgba(200, 80, 68, 0.16);

    --gold: #c9a55c;
    --gold-soft: rgba(201, 165, 92, 0.12);
  }
}

[data-theme="dark"] {
  --bg: #131211;
  --bg-soft: #1b1a17;
  --bg-card: #191816;
  --fg: #ece8df;
  --fg-soft: #c4bfb4;
  --muted: #8e887c;
  --line: #2b2925;
  --line-soft: #232019;

  --wyb: #57c49c;
  --wyb-bright: #6fdcb2;
  --wyb-soft: rgba(87, 196, 156, 0.11);
  --wyb-glow: rgba(60, 180, 140, 0.16);

  --xz: #e5756a;
  --xz-bright: #f08b7f;
  --xz-soft: rgba(229, 117, 106, 0.1);
  --xz-glow: rgba(200, 80, 68, 0.16);

  --gold: #c9a55c;
  --gold-soft: rgba(201, 165, 92, 0.12);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.78;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; }

a { color: inherit; }

/* ---------- 页头 ---------- */

.site-header {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 26px 28px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--fg);
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  width: 26px;
  height: 26px;
  flex: 0 0 auto;
}

.brand-mark i {
  display: block;
  border-radius: 2px;
}
.brand-mark i:nth-child(1) { background: var(--wyb); }
.brand-mark i:nth-child(2) { background: var(--xz); }
.brand-mark i:nth-child(3) { background: var(--xz); opacity: 0.5; }
.brand-mark i:nth-child(4) { background: var(--wyb); opacity: 0.5; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-wrap: wrap;
  justify-content: flex-end;
  min-width: 0;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  padding: 6px 11px;
  border-radius: 6px;
  white-space: nowrap;
  transition: color 0.16s ease, background 0.16s ease;
}

.site-nav a:hover { color: var(--fg); background: var(--bg-soft); }
.site-nav a[aria-current="page"] { color: var(--fg); font-weight: 600; }

.theme-btn {
  margin-left: 6px;
  width: 32px;
  height: 32px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  padding: 0;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.theme-btn:hover { color: var(--fg); border-color: var(--muted); }
.theme-btn svg { width: 15px; height: 15px; }
.theme-btn .icon-sun { display: none; }
[data-theme="dark"] .theme-btn .icon-sun { display: block; }
[data-theme="dark"] .theme-btn .icon-moon { display: none; }

/* ---------- 主区域 ---------- */

main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px 100px;
}

main.wide { max-width: var(--wide); }

/* ---------- 首屏 ---------- */

.hero {
  position: relative;
  padding: 82px 0 56px;
  text-align: center;
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -60px;
  width: 100%;
  height: 460px;
  transform: translateX(-50%);
  background:
    radial-gradient(340px 240px at 26% 38%, var(--wyb-glow), transparent 72%),
    radial-gradient(340px 240px at 74% 38%, var(--xz-glow), transparent 72%);
  filter: blur(6px);
  z-index: -1;
  pointer-events: none;
}

.hero-kicker {
  font-size: 0.72rem;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--muted);
  margin: 0 0 22px;
}

.hero h1 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: clamp(2rem, 5.6vw, 3rem);
  line-height: 1.28;
  letter-spacing: 0.02em;
  font-weight: 700;
}

.hero h1 .a { color: var(--wyb); }
.hero h1 .b { color: var(--xz); }

.hero-rule {
  width: 62px;
  height: 2px;
  margin: 26px auto;
  border: none;
  background: linear-gradient(90deg, var(--wyb) 0 50%, var(--xz) 50% 100%);
  border-radius: 2px;
}

.hero p.lede {
  margin: 0 auto;
  max-width: 32em;
  color: var(--fg-soft);
  font-size: 1rem;
}

.hero-meta {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px 26px;
  font-size: 0.82rem;
  color: var(--muted);
}

/* ---------- 双人卡片 ---------- */

.duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin: 8px 0 0;
}

.duo-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 26px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--bg-card);
  text-decoration: none;
  overflow: hidden;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.duo-card::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: var(--tone);
}

.duo-card:hover { transform: translateY(-2px); border-color: var(--tone); }

.duo-card.wyb { --tone: var(--wyb); --tone-soft: var(--wyb-soft); }
.duo-card.xz  { --tone: var(--xz);  --tone-soft: var(--xz-soft); }

.seal {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--tone);
  border-radius: 3px;
  color: var(--tone);
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1;
  margin-bottom: 18px;
  background: var(--tone-soft);
}

.duo-card h2 {
  margin: 0 0 4px;
  font-family: var(--serif);
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.duo-card .en {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.duo-card p {
  margin: 0 0 16px;
  font-size: 0.89rem;
  color: var(--muted);
  line-height: 1.7;
}

.duo-card .go {
  margin-top: auto;
  font-size: 0.82rem;
  color: var(--tone);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

/* ---------- 区块标题 ---------- */

.section {
  margin-top: 62px;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.section-head .aside {
  font-size: 0.78rem;
  color: var(--muted);
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

/* ---------- 作品年表 ---------- */

.timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.timeline li {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: 16px;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
}

.timeline li:last-child { border-bottom: none; }

.timeline .yr {
  font-size: 0.8rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.timeline .ttl {
  font-size: 0.95rem;
  color: var(--fg-soft);
}

.timeline .ttl strong {
  color: var(--fg);
  font-weight: 600;
}

.timeline .kind {
  font-size: 0.72rem;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 9px;
  white-space: nowrap;
  flex-shrink: 0;
}

/* ---------- 双人并列作品（共同作品区块） ---------- */

.joint {
  position: relative;
  display: block;
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(120deg, var(--wyb-soft), transparent 42%),
    linear-gradient(240deg, var(--xz-soft), transparent 42%),
    var(--bg-card);
  text-decoration: none;
  transition: border-color 0.2s ease;
}

.joint:hover { border-color: var(--muted); }

.joint .badge {
  display: inline-block;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  background: var(--gold-soft);
  border-radius: 999px;
  padding: 3px 11px;
  margin-bottom: 14px;
}

.joint h3 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.joint p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--muted);
  max-width: 40em;
}

/* ---------- 插画 ---------- */

.art-band { margin: 0 0 38px; }
.article-header + .art-band { margin: 34px 0 0; }

.art-frame {
  height: 264px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--bg-soft), var(--bg-card));
}

.art-frame svg { display: block; width: 100%; height: 100%; }

.art-band figcaption {
  margin-top: 12px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--muted);
  text-align: center;
}

/* SVG 内部的线条语言 */
.art-g { stroke: var(--wyb); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.art-r { stroke: var(--xz); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.art-m { stroke: var(--muted); fill: none; stroke-width: 1.1; stroke-linecap: round; opacity: 0.45; }
.art-o { stroke: var(--gold); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.art-g path, .art-r path, .art-m path, .art-o path { vector-effect: non-scaling-stroke; }
.art-fill-g { fill: var(--wyb); stroke: none; }
.art-fill-r { fill: var(--xz); stroke: none; }
.art-fill-m { fill: var(--muted); stroke: none; }

.art-mini { display: block; width: 100%; height: auto; margin: 2px 0 18px; }

/* ---------- 文章列表 ---------- */

.post-list { list-style: none; margin: 0; padding: 0; }

.post-list li { border-bottom: 1px solid var(--line); }
.post-list li:last-child { border-bottom: none; }

.post-list a {
  display: block;
  padding: 22px 0;
  text-decoration: none;
  color: inherit;
  transition: opacity 0.16s ease;
}

.post-list a:hover { opacity: 0.6; }

.post-list .row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 18px;
}

.post-list h3 {
  margin: 0;
  font-size: 1.04rem;
  font-weight: 600;
  line-height: 1.5;
}

.post-list .excerpt {
  margin: 7px 0 0;
  font-size: 0.89rem;
  color: var(--muted);
  line-height: 1.68;
}

.tags { margin-top: 10px; display: flex; gap: 6px; flex-wrap: wrap; }

.tag {
  font-size: 0.72rem;
  padding: 2px 9px;
  border-radius: 999px;
  background: var(--bg-soft);
  color: var(--muted);
  border: 1px solid var(--line);
}

/* ---------- 人物页头部 ---------- */

.profile {
  padding: 68px 0 40px;
  border-bottom: 1px solid var(--line);
}

.profile-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 3px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.profile.wyb .profile-tag { color: var(--wyb); background: var(--wyb-soft); }
.profile.xz  .profile-tag { color: var(--xz);  background: var(--xz-soft); }

.profile h1 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  line-height: 1.24;
  letter-spacing: 0.03em;
  font-weight: 700;
}

.profile h1 .en {
  display: block;
  font-family: var(--sans);
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: 14px;
}

.profile .summary {
  margin: 0;
  color: var(--fg-soft);
  max-width: 36em;
}

.facts {
  margin: 30px 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.facts > div {
  background: var(--bg-card);
  padding: 14px 16px;
}

.facts dt {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 4px;
}

.facts dd {
  margin: 0;
  font-size: 0.92rem;
  color: var(--fg);
  font-weight: 500;
}

/* ---------- 正文 ---------- */

.article-header {
  padding: 62px 0 30px;
  border-bottom: 1px solid var(--line);
}

.article-header h1 {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-size: clamp(1.5rem, 4.4vw, 2rem);
  line-height: 1.4;
  letter-spacing: 0.02em;
  font-weight: 700;
}

.byline {
  font-size: 0.82rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  align-items: center;
}

.prose { padding-top: 34px; }
.prose > *:first-child { margin-top: 0; }

.prose h2 {
  margin: 2.3em 0 0.7em;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.prose h3 {
  margin: 1.9em 0 0.55em;
  font-size: 1.02rem;
  font-weight: 650;
}

.prose p { margin: 0 0 1.2em; color: var(--fg-soft); }

.prose a {
  color: var(--xz);
  text-decoration: none;
  border-bottom: 1px solid var(--xz-soft);
}

.prose a:hover { border-bottom-color: var(--xz); }

.prose ul, .prose ol {
  margin: 0 0 1.2em;
  padding-left: 1.35em;
  color: var(--fg-soft);
}

.prose li { margin-bottom: 0.5em; }

.prose blockquote {
  margin: 1.8em 0;
  padding: 4px 0 4px 20px;
  border-left: 2px solid var(--gold);
  color: var(--muted);
  font-family: var(--serif);
  font-size: 1.02rem;
}

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

.prose hr { border: none; border-top: 1px solid var(--line); margin: 2.6em 0; }

.note {
  margin: 2em 0;
  padding: 16px 18px;
  border-radius: var(--radius-lg);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  font-size: 0.88rem;
  color: var(--muted);
}

.note strong { color: var(--fg); }

.article-footer {
  margin-top: 58px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
}

.back-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.back-link:hover { color: var(--fg); }

/* ---------- 页脚 ---------- */

.site-footer {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 32px 28px 54px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--fg); }

/* ---------- 404 ---------- */

.center-page {
  min-height: 58vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  text-align: left;
}

.center-page .code {
  font-family: var(--serif);
  font-size: 3.2rem;
  font-weight: 700;
  color: var(--line);
  line-height: 1;
  margin-bottom: 20px;
}

.center-page h1 { margin: 0 0 12px; font-family: var(--serif); font-size: 1.35rem; }
.center-page p { color: var(--muted); margin: 0 0 26px; }

.btn {
  display: inline-block;
  padding: 10px 20px;
  border-radius: 8px;
  background: var(--fg);
  color: var(--bg);
  text-decoration: none;
  font-size: 0.88rem;
  font-weight: 550;
  transition: opacity 0.16s ease;
}

.btn:hover { opacity: 0.8; }

/* ---------- 移动端 ---------- */

@media (max-width: 640px) {
  body { font-size: 15.5px; }

  .site-header {
    padding: 18px 18px 0;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 10px;
  }

  .site-nav {
    justify-content: flex-start;
    gap: 0;
    width: 100%;
    margin-top: 2px;
  }

  .site-nav a {
    font-size: 0.83rem;
    padding: 5px 8px;
  }

  .theme-btn { margin-left: auto; }

  main { padding: 0 18px 76px; }
  main.wide { padding: 0 18px 76px; }

  .hero { padding: 46px 0 40px; }

  .hero::before {
    top: -24px;
    height: 300px;
    background:
      radial-gradient(190px 150px at 24% 40%, var(--wyb-glow), transparent 74%),
      radial-gradient(190px 150px at 76% 40%, var(--xz-glow), transparent 74%);
  }

  .hero-meta { gap: 8px 18px; font-size: 0.78rem; }

  .duo { grid-template-columns: 1fr; gap: 14px; }
  .duo-card { padding: 24px 20px 22px; }

  .section { margin-top: 46px; }

  .timeline li {
    grid-template-columns: 44px 1fr auto;
    gap: 10px;
    padding: 12px 0;
  }

  .timeline .ttl { font-size: 0.9rem; }

  .timeline .kind {
    grid-column: auto;
    justify-self: end;
    margin-top: 0;
    font-size: 0.68rem;
    padding: 0 7px;
  }

  .joint { padding: 24px 20px; }

  .art-frame { height: 168px; }
  .art-band figcaption { font-size: 0.68rem; }

  .post-list .row { flex-direction: column; gap: 5px; }

  .profile { padding: 46px 0 32px; }
  .article-header { padding: 44px 0 24px; }
  .site-footer { padding: 26px 18px 42px; }
}

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