/* Kiki 个人站 v2 · 辙痕总目录 */
@font-face { font-family: "Kiki Serif"; src: url("fonts/serif-900.woff2") format("woff2"); font-weight: 900; font-display: swap; }
@font-face { font-family: "Kiki Sans"; src: url("fonts/sans.woff2") format("woff2"); font-weight: 400 700; font-display: swap; }
@font-face { font-family: "Kiki Mono"; src: url("fonts/mono-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --ground: #EEEDE8;
  --surface: #F7F6F2;
  --ink: #121212;
  --ink-2: #2E2E2A;
  --muted: #55554F;
  --rule: #C9C8C0;
  --dash: #77776F;
  --accent: #B8321B;
  --accent-ink: #8F2614;
  --accent-on-dark: #F07457;
  --on-dark-2: #D6D5CE;
  --on-dark-3: #A8A79F;
  --serif: "Kiki Serif", "Noto Serif SC", "Songti SC", "STSong", serif;
  --sans: "Kiki Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "Kiki Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --gutter: clamp(20px, 5vw, 80px);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--ground); color: var(--ink); font: 17px/1.8 var(--sans); }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--accent); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
button { font: inherit; cursor: pointer; }
h1, h2, h3, p, ol, ul, dl, dd { margin: 0; }
ol, ul { list-style: none; padding: 0; }
svg { flex-shrink: 0; }

.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--ground); padding: 8px 16px; z-index: 10; }
.skip:focus { left: 8px; }

.wrap { max-width: 1280px; margin: 0 auto; padding: 0 var(--gutter); }
.mono { font-family: var(--mono); font-size: 12px; letter-spacing: .08em; }
.kicker { font-family: var(--mono); font-size: 12px; letter-spacing: .14em; color: var(--accent); }
.serif { font-family: var(--serif); font-weight: 900; }
.muted { color: var(--muted); }

/* header */
.site-head { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; padding: 28px 0 20px; border-bottom: 1px solid var(--ink); }
.double-rule { height: 3px; border-bottom: 1px solid var(--ink); }
.brand { display: flex; align-items: baseline; gap: 12px; }
.brand b { font: 900 26px/1 var(--serif); letter-spacing: .02em; }
.brand span { font-family: var(--mono); font-size: 12px; color: var(--muted); letter-spacing: .08em; }
.nav { display: flex; flex-wrap: wrap; align-items: center; gap: 4px 28px; font-size: 15px; }
.nav a { display: inline-flex; align-items: center; min-height: 44px; }

/* buttons */
.btn { display: inline-flex; align-items: center; gap: 10px; min-height: 52px; padding: 0 26px; border-radius: 2px; font-weight: 500; border: 1px solid currentColor; }
.btn-sm { min-height: 44px; padding: 0 18px; font-weight: 400; gap: 8px; }
.btn-solid { background: var(--ink); color: var(--ground); border-color: var(--ink); }
.btn-solid:hover { background: var(--accent); border-color: var(--accent); color: var(--ground); }
.btn-light { background: var(--ground); color: var(--ink); border-color: var(--ground); }
.btn-light:hover { background: var(--accent-on-dark); border-color: var(--accent-on-dark); color: var(--ink); }
.btn-ghost-dark { color: var(--ground); }
.btn-ghost-dark:hover { color: var(--accent-on-dark); }
.link-line { display: inline-flex; align-items: center; min-height: 44px; border-bottom: 1px solid var(--ink); font-weight: 500; }

/* shared grids */
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: 48px; }
.span-2 { grid-column: span 2; min-width: 0; }
@media (max-width: 760px) { .span-2 { grid-column: auto; } }
.section { border-top: 1px solid var(--ink); padding: 40px 0 96px; }
.section-head { display: flex; flex-direction: column; gap: 16px; }
.h2 { font: 900 clamp(34px, 4vw, 52px)/1.15 var(--serif); }
.placeholder { position: relative; border: 1px dashed var(--dash); display: flex; align-items: center; justify-content: center; background: repeating-linear-gradient(135deg, transparent 0 14px, rgba(18,18,18,.04) 14px 15px); }
.placeholder > span { position: relative; font-family: var(--mono); font-size: 12px; letter-spacing: .1em; color: var(--muted); background: var(--ground); padding: 8px 14px; }
.tag { padding: 2px 8px; border: 1px solid var(--muted); color: var(--muted); white-space: nowrap; }
.tag.planned { border-color: var(--accent); color: var(--accent); }

/* hero */
.hero { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); gap: 48px; padding: 72px 0 64px; align-items: end; }
.hero-copy { display: flex; flex-direction: column; gap: 32px; min-width: 0; }
.hero h1 { font: 900 clamp(48px, 7.6vw, 128px)/1.05 var(--serif); letter-spacing: -.02em; }
.hero h1 span { white-space: nowrap; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { max-width: 30em; font-size: 18px; color: var(--ink-2); }
.actions { display: flex; flex-wrap: wrap; gap: 12px 24px; align-items: center; }
.hero-side { display: flex; flex-direction: column; gap: 20px; min-width: 0; }
.hero-fig { aspect-ratio: 4 / 3; }
.hero-fig svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.toc { border-top: 1px solid var(--ink); }
.toc li { border-bottom: 1px solid var(--rule); }
.toc a { display: grid; grid-template-columns: 48px 1fr auto; gap: 12px; align-items: center; min-height: 48px; }
.toc .no { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.toc .pg { font-family: var(--mono); font-size: 12px; color: var(--muted); }

/* about */
.lead { font-size: 20px; line-height: 1.75; max-width: 34em; }
.about-body { display: flex; flex-direction: column; gap: 32px; }
.triad { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); border-top: 1px solid var(--ink); }
.triad div { padding: 20px 20px 20px 0; border-bottom: 1px solid var(--rule); display: flex; flex-direction: column; gap: 6px; }
.triad strong { font: 900 22px/1.4 var(--serif); }
.triad p { font-size: 15px; color: #3C3C37; }
.resume { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: baseline; font-size: 14px; color: var(--muted); }

/* works */
.works { display: flex; flex-direction: column; gap: 32px; }
.works-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 24px; }
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filters button { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border-radius: 999px; font-size: 14px; border: 1px solid var(--ink); background: transparent; color: var(--ink); }
.filters button[aria-pressed="true"] { background: var(--ink); color: var(--ground); }
.filters button:hover { border-color: var(--accent); }
.work-list { border-top: 1px solid var(--ink); }
.work-list li { border-bottom: 1px solid var(--rule); }
.work-list li[hidden] { display: none; }
.work { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 200px), 1fr)); gap: 8px 32px; padding: 28px 0; align-items: baseline; }
.work-title { display: flex; gap: 20px; align-items: baseline; min-width: 0; }
.work-title .no { font-family: var(--mono); font-size: 13px; color: var(--accent); }
.work-title b { font: 900 clamp(26px, 3vw, 38px)/1.2 var(--serif); }
.work-desc { font-size: 16px; color: var(--ink-2); }
.work-meta { display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: space-between; align-items: center; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.work:hover .work-title b { color: var(--accent); }

/* featured + dark bands */
.dark { background: var(--ink); color: var(--ground); }
.featured { margin: 0 calc(-1 * var(--gutter)); padding: 72px var(--gutter); display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); gap: 48px; align-items: center; }
.featured .kicker, .dark .kicker { color: var(--accent-on-dark); }
.featured-copy { display: flex; flex-direction: column; gap: 20px; align-items: flex-start; }
.featured h2 { font: 900 clamp(48px, 7vw, 96px)/1 var(--serif); }
.featured p { font-size: 18px; color: var(--on-dark-2); max-width: 28em; }
.flow { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 130px), 1fr)); border-top: 1px solid var(--muted); }
.flow li { padding: 20px 16px 20px 0; display: flex; flex-direction: column; gap: 8px; }
.flow li + li { padding-left: 16px; border-left: 1px solid #3A3A36; }
.flow .no { font-family: var(--mono); font-size: 12px; color: var(--accent-on-dark); }
.flow span:last-child { font: 900 20px/1.4 var(--serif); }
@media (max-width: 600px) { .flow li + li { padding-left: 0; border-left: 0; border-top: 1px solid #3A3A36; } }

/* channels */
.channels { padding: 72px 0 96px; display: flex; flex-direction: column; gap: 32px; }
.channels-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: end; gap: 16px; }
.channels-head p { max-width: 24em; font-size: 15px; color: #3C3C37; }
.channel-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 16px; }
.channel { background: var(--surface); border: 1px solid var(--rule); padding: 24px; display: flex; flex-direction: column; gap: 16px; }
.channel-top { display: flex; justify-content: space-between; align-items: center; gap: 8px; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.channel h3 { font: 900 24px/1.3 var(--serif); }
.channel p { font-size: 15px; color: #3C3C37; flex-grow: 1; }
.channel-foot { display: flex; gap: 16px; align-items: center; }
.qr { width: 72px; height: 72px; flex-shrink: 0; border: 1px dashed var(--dash); display: flex; align-items: center; justify-content: center; font-family: var(--mono); font-size: 10px; line-height: 1.3; color: var(--muted); text-align: center; }
.channel details summary { display: inline-flex; align-items: center; min-height: 44px; border-bottom: 1px solid var(--ink); font-size: 15px; font-weight: 500; cursor: pointer; list-style: none; }
.channel details summary::-webkit-details-marker { display: none; }
.channel details p { margin-top: 8px; font-size: 14px; color: var(--muted); }

/* notes */
.notes { border-top: 1px solid var(--ink); }
.notes li { border-bottom: 1px solid var(--rule); padding: 24px 0; display: flex; flex-direction: column; gap: 8px; }
.notes .meta { display: flex; flex-wrap: wrap; gap: 8px 16px; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.notes .meta b { font-weight: 400; color: var(--accent); }
.notes h3 { font: 900 22px/1.45 var(--serif); }
.notes p { font-size: 15px; color: #3C3C37; }

/* footer */
.foot { padding-top: 80px; padding-bottom: 40px; display: flex; flex-direction: column; gap: 56px; }
.foot h2 { font: 900 clamp(44px, 7vw, 104px)/1.05 var(--serif); }
.foot h2 em { font-style: normal; color: var(--accent-on-dark); }
.foot-cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 32px; border-top: 1px solid var(--muted); padding-top: 28px; font-size: 15px; }
.foot-cols > * { display: flex; flex-direction: column; gap: 8px; }
.foot-cols .mono { color: var(--on-dark-3); }
.foot-cols a { min-height: 32px; display: inline-flex; align-items: center; }
.foot-cols a:hover { color: var(--accent-on-dark); }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; color: var(--on-dark-3); }

/* case page */
.notice { margin-top: 32px; padding: 14px 18px; border: 1px solid var(--accent); color: var(--accent-ink); font-size: 14px; display: flex; flex-wrap: wrap; gap: 4px 16px; }
.notice strong { font-family: var(--mono); font-size: 12px; letter-spacing: .1em; }
.case-hero { padding: 56px 0 64px; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 380px), 1fr)); gap: 48px; align-items: end; }
.case-hero h1 { font: 900 clamp(72px, 12vw, 168px)/.95 var(--serif); letter-spacing: -.02em; margin: 20px 0; }
.case-hero p { font-size: 20px; max-width: 26em; }
.facts { display: grid; grid-template-columns: max-content 1fr; border-top: 1px solid var(--ink); font-size: 15px; }
.facts dt, .facts dd { padding: 12px 0; border-bottom: 1px solid var(--rule); }
.facts dt { padding-right: 24px; font-family: var(--mono); font-size: 12px; color: var(--muted); }
.case-cover { aspect-ratio: 16 / 7; }
.case-body { padding: 64px 0 96px; }
.case-sec { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr)); gap: 16px 48px; padding: 32px 0; border-top: 1px solid var(--ink); }
.case-sec h2 { font: 900 28px/1.3 var(--serif); }
.case-sec h2 .mono { display: block; font-weight: 400; color: var(--accent); letter-spacing: 0; }
.case-sec h2 small { display: block; font: 400 14px/1.6 var(--sans); color: var(--accent-ink); }
.checks { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr)); gap: 0 24px; }
.checks li { padding: 10px 0; border-bottom: 1px solid var(--rule); display: flex; gap: 16px; }
.checks li::before { content: "✓"; font-family: var(--mono); font-size: 13px; color: var(--muted); }
.checks.unknown li::before { content: "?"; color: var(--accent-ink); }
.case-flow { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 150px), 1fr)); border-top: 1px dashed var(--dash); }
.case-flow li { padding: 20px 16px 20px 0; display: flex; flex-direction: column; gap: 6px; }
.case-flow .no { font-family: var(--mono); font-size: 12px; color: var(--accent); }
.case-flow span:last-child { font: 900 20px/1.4 var(--serif); }
.next { padding-top: 64px; padding-bottom: 64px; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 32px; align-items: end; }
.next-copy { display: flex; flex-direction: column; gap: 12px; }
.next-copy b { font: 900 clamp(40px, 5vw, 64px)/1.1 var(--serif); }
.next-copy span:last-child { color: var(--on-dark-2); font-size: 15px; }
.next .actions { justify-content: flex-end; }
@media (max-width: 760px) { .next .actions { justify-content: flex-start; } }