/* ============================================================
   NAOVA — 工作档案
   V3 · 灰阶排版版：黑白灰三层 + 中性无衬线大字 + 圆角图卡
   ============================================================ */

:root {
  color-scheme: light;
  --bg: #fbfbfd;
  --bg-alt: #f5f5f7;
  --card: #ffffff;
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --ink-3: #a1a1a6;
  --line: #d2d2d7;
  --accent: #0066cc;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Monaco, Consolas, "Liberation Mono", "PingFang SC", "Microsoft YaHei", monospace;
  --width: 1180px;
  --gutter: 48px;
  --radius: 24px;
  --shadow: 0 24px 60px rgba(0, 0, 0, .10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
.wrap { max-width: var(--width); margin: 0 auto; padding: 0 var(--gutter); }
.skip-link {
  position: absolute; left: -9999px; top: 0;
  background: var(--ink); color: #fff; padding: 10px 18px; z-index: 99; font-size: 14px;
}
.skip-link:focus { left: 10px; top: 10px; }
.page-frame, .seal, .ledger-cols { display: none; }

/* ---------- masthead ---------- */
.masthead {
  position: sticky; top: 0; z-index: 50;
  background: rgba(251, 251, 253, .78);
  backdrop-filter: saturate(180%) blur(18px);
  -webkit-backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid rgba(0, 0, 0, .06);
}
.masthead .wrap {
  min-height: 52px;
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.wordmark {
  font-weight: 650; font-size: 15px; letter-spacing: .06em;
  text-decoration: none;
}
.doc-tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
  color: var(--ink-2);
}
.masthead nav { display: flex; gap: 34px; }
.masthead nav a {
  font-size: 13px; color: var(--ink); opacity: .82;
  text-decoration: none; transition: opacity .2s ease;
}
.masthead nav a:hover { opacity: 1; }

/* ---------- opening ---------- */
.opening .wrap { padding: 128px var(--gutter) 72px; }
.doc-kicker {
  margin: 0 0 26px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ink-2);
}
.opening h1 {
  margin: 0;
  font-weight: 650;
  font-size: clamp(48px, 7.8vw, 96px);
  line-height: 1.06; letter-spacing: -0.022em;
}
.opening h1 em { font-style: normal; color: var(--ink-3); }
.sub {
  margin: 30px 0 0; max-width: 620px;
  font-size: clamp(17px, 1.6vw, 21px); line-height: 1.6;
  color: var(--ink-2);
}
.doc-meta {
  margin: 72px 0 0; padding: 22px 0 0;
  border-top: 1px solid var(--line);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.doc-meta dt {
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-2); margin-bottom: 7px;
}
.doc-meta dd { margin: 0; font-size: 15px; font-weight: 550; }

/* ---------- works ---------- */
.works { border-top: 1px solid var(--line); }
.work {
  padding: 104px var(--gutter) 116px;
  text-align: center;
}
.work:nth-child(even) { background: var(--bg-alt); }
.work-info { max-width: 660px; margin: 0 auto; }
.work-eyebrow {
  margin: 0 0 16px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-2);
}
.work-num { color: var(--accent); margin-right: 10px; font-weight: 600; }
.work h3 {
  margin: 0;
  font-weight: 650; font-size: clamp(32px, 4.2vw, 52px);
  line-height: 1.12; letter-spacing: -0.02em;
}
.work-desc {
  margin: 18px auto 0; max-width: 560px;
  font-size: 17px; line-height: 1.65; color: var(--ink-2);
}
.work-status {
  margin: 20px 0 0;
  font-family: var(--mono); font-size: 12px; letter-spacing: .1em;
  color: var(--ink-2);
}
.work-status::before {
  content: ""; display: inline-block; width: 7px; height: 7px;
  border-radius: 50%; background: var(--accent);
  margin-right: 9px; vertical-align: 1px;
}
.text-link {
  display: inline-block; margin-top: 26px;
  font-size: 16px; font-weight: 550; color: var(--accent);
  text-decoration: none;
}
.text-link .arrow { display: inline-block; transition: transform .18s ease; }
.text-link:hover .arrow { transform: translateX(4px); }
.work-figure {
  display: block; margin: 56px auto 0;
  width: min(980px, 100%);
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
}
.work-figure:hover { transform: translateY(-4px); box-shadow: 0 32px 72px rgba(0, 0, 0, .13); }
.work-figure img { width: 100%; max-height: 600px; object-fit: cover; object-position: top center; }

/* image-less card: 报告摘录 */
.work-figure.is-sheet {
  background: var(--card);
  border: 1px solid var(--line);
  padding: 54px 20px;
  text-decoration: none;
}
.sheet {
  display: block; max-width: 520px; margin: 0 auto; text-align: left;
}
.sheet-row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 24px;
  padding: 15px 4px; border-bottom: 1px dashed var(--line);
}
.sheet-row:last-child { border-bottom: 0; }
.sheet-row i {
  font-style: normal; font-size: 13px; color: var(--ink-2);
}
.sheet-row b {
  font-family: var(--mono); font-weight: 500; font-size: 13.5px; color: var(--ink);
}

/* ---------- tools rail ---------- */
.tools-rail { padding: 72px 0 100px; background: var(--bg); }
.rail-eyebrow {
  font-family: var(--mono); font-size: 12px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--ink-2); margin: 0 0 12px;
}
.rail-title { margin: 0; font-size: clamp(30px, 4vw, 46px); font-weight: 700; letter-spacing: -.02em; }
.rail {
  display: flex; gap: 22px; overflow-x: auto; scroll-snap-type: x mandatory;
  padding: 44px max(var(--gutter), calc((100vw - var(--width)) / 2 + var(--gutter))) 28px;
  scroll-padding-left: max(var(--gutter), calc((100vw - var(--width)) / 2 + var(--gutter)));
  scrollbar-width: none;
}
.rail::-webkit-scrollbar { display: none; }
.rail-card {
  flex: 0 0 min(78vw, 540px); scroll-snap-align: start;
  background: #fff; border-radius: 24px; overflow: hidden;
  box-shadow: 0 10px 28px rgba(0,0,0,.08);
  text-decoration: none; color: inherit;
  display: flex; flex-direction: column;
  transition: transform .45s cubic-bezier(.2,.7,.2,1), box-shadow .45s;
}
.rail-card:hover { transform: translateY(-5px); box-shadow: 0 24px 60px rgba(0,0,0,.13); }
.rail-card img {
  width: 100%; height: 300px; object-fit: cover; object-position: top center; display: block;
}
.rc-sheet {
  height: 300px; background: var(--bg-alt);
  display: flex; flex-direction: column; justify-content: center; padding: 0 38px;
}
.rc-body { display: block; padding: 26px 30px 30px; }
.rc-eyebrow { font-family: var(--mono); font-size: 11px; letter-spacing: .16em; color: var(--ink-2); }
.rc-title { display: block; margin-top: 9px; font-size: 24px; font-weight: 700; letter-spacing: -.01em; }
.rc-desc { display: block; margin-top: 7px; font-size: 15px; color: var(--ink-2); }
.rc-link { display: inline-block; margin-top: 14px; font-size: 15px; color: var(--accent); }
.rail-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; }
.rail-nav { display: flex; gap: 12px; }
.rail-btn {
  width: 44px; height: 44px; border-radius: 50%; border: 0; cursor: pointer;
  background: #e8e8ed; color: var(--ink); display: grid; place-items: center;
  transition: background .3s, opacity .3s;
}
.rail-btn:hover { background: #d2d2d7; }
.rail-btn[disabled] { opacity: .35; cursor: default; }
.rail-btn[disabled]:hover { background: #e8e8ed; }
.rail-btn svg { width: 12px; height: 20px; display: block; }

/* ---------- about ---------- */
.about { background: var(--bg-alt); }
.about .wrap {
  padding: 110px var(--gutter);
  display: grid; grid-template-columns: 300px 1fr; gap: 88px; align-items: start;
}
.about h2 {
  margin: 0 0 30px;
  font-weight: 650; font-size: clamp(30px, 3.4vw, 42px); letter-spacing: -0.02em;
}
.plate {
  margin: 0; border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); background: var(--card);
}
.plate-cap {
  margin: 16px 2px 0; display: flex; gap: 14px; align-items: baseline;
  font-size: 13px; color: var(--ink-2);
}
.pno { font-family: var(--mono); font-size: 11px; letter-spacing: .12em; color: var(--ink-3); }
.about-name {
  margin: 0 0 30px;
  font-size: 19px; font-weight: 600; letter-spacing: .01em;
}
.about-name span {
  display: block; margin-top: 6px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em;
  color: var(--ink-2);
}
.about-statement {
  margin: 6px 0 0;
  font-weight: 600; font-size: clamp(24px, 2.8vw, 34px);
  line-height: 1.35; letter-spacing: -0.015em;
}
.about-body { margin: 22px 0 0; max-width: 560px; color: var(--ink-2); }
.contact-list { margin-top: 44px; border-top: 1px solid var(--line); }
.contact-list a {
  display: flex; justify-content: space-between; align-items: baseline; gap: 20px;
  padding: 16px 2px; border-bottom: 1px solid var(--line);
  text-decoration: none; font-size: 15.5px; font-weight: 500;
  transition: color .16s ease;
}
.contact-list a:hover { color: var(--accent); }
.contact-list a span {
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
  color: var(--ink-2); text-transform: uppercase;
}

/* ---------- colophon ---------- */
.colophon .wrap {
  padding: 30px var(--gutter);
  display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap;
  font-size: 13px; color: var(--ink-2);
  border-top: 1px solid var(--line);
}

/* ============================================================
   详情页
   ============================================================ */
.back-link {
  display: inline-block; margin-top: 44px;
  font-size: 14px; color: var(--accent); text-decoration: none; font-weight: 500;
}
.doc-head .wrap { padding: 76px var(--gutter) 72px; }
.doc-head h1 {
  margin: 18px 0 0;
  font-weight: 650; font-size: clamp(42px, 6vw, 76px);
  line-height: 1.05; letter-spacing: -0.025em;
}
.doc-head h1 .zh {
  display: block; margin-top: 12px;
  font-size: .42em; font-weight: 550; color: var(--ink-2); letter-spacing: 0;
}
.doc-lead {
  margin: 26px 0 0; max-width: 640px;
  font-size: clamp(17px, 1.6vw, 20px); line-height: 1.6; color: var(--ink-2);
}
.status-table {
  margin: 56px 0 0; padding: 26px 0;
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px;
}
.status-table dt {
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-2); margin-bottom: 8px;
}
.status-table dd { margin: 0; font-size: 15px; font-weight: 550; }
.status-table dd.alert { color: #b64400; }

.plate-section .wrap { padding: 20px var(--gutter) 90px; }
.plate-section .plate { box-shadow: var(--shadow); }
.plate-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }

.blocks .wrap { padding: 0 var(--gutter) 40px; }
.block {
  display: grid; grid-template-columns: 210px 1fr; gap: 56px;
  padding: 64px 0; border-top: 1px solid var(--line);
}
.block-no {
  font-family: var(--mono); font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-2); padding-top: 10px;
}
.block h2 {
  margin: 0 0 20px;
  font-weight: 600; font-size: clamp(26px, 3vw, 38px);
  line-height: 1.2; letter-spacing: -0.018em;
}
.block p { margin: 0 0 16px; max-width: 640px; color: var(--ink-2); }
.block p:last-child { margin-bottom: 0; }

.spec-list { margin: 8px 0 0; max-width: 640px; border-top: 1px solid var(--line); }
.spec-list > div {
  display: grid; grid-template-columns: 1fr 1.2fr; gap: 24px;
  padding: 14px 2px; border-bottom: 1px solid var(--line);
}
.spec-list dt { font-weight: 550; font-size: 14.5px; }
.spec-list dd { margin: 0; font-size: 14px; color: var(--ink-2); }
.spec-list dd .ok, .spec-list dd.ok {
  background: rgba(0, 102, 204, .09); border-radius: 4px; padding: 1px 5px;
}

.report-sheet {
  max-width: 640px; margin: 10px 0 0;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 18px; box-shadow: var(--shadow);
}
.report-inner { padding: 34px 38px; }
.r-head {
  font-family: var(--mono); font-size: 11px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-2);
  padding-bottom: 16px; border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 16px;
}
.report-sheet .row {
  display: flex; justify-content: space-between; align-items: baseline; gap: 24px;
  padding: 15px 0; border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.report-sheet .row:last-of-type { border-bottom: 0; }
.report-sheet .k { color: var(--ink-2); }
.report-sheet .v { font-family: var(--mono); font-size: 13px; }
.report-sheet .v.alert { color: #b64400; }
.report-sheet .v.dim { color: var(--ink-3); }

.next-project { border-top: 1px solid var(--line); }
.next-project .wrap { padding: 80px var(--gutter); }
.np-label {
  margin: 0 0 14px;
  font-family: var(--mono); font-size: 12px; letter-spacing: .16em;
  text-transform: uppercase; color: var(--ink-2);
}
.np-title {
  margin: 0; font-weight: 650;
  font-size: clamp(32px, 4.4vw, 56px); letter-spacing: -0.022em; line-height: 1.1;
}
a.next-project { text-decoration: none; display: block; }
.next-project .np-title { transition: color .18s ease; }
a.next-project:hover .np-title { color: var(--accent); }

/* ---------- reveal ---------- */
[data-reveal] { opacity: 0; transform: translateY(16px); transition: opacity .7s ease, transform .7s ease; }
[data-reveal].in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .text-link .arrow, .work-figure, .next-project .np-title .arrow { transition: none; }
}

@media print {
  .masthead { position: static; }
  [data-reveal] { opacity: 1; transform: none; }
  .work, .about .wrap, .doc-head .wrap { padding-top: 40px; padding-bottom: 40px; }
}

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  :root { --gutter: 22px; --radius: 18px; }
  .opening .wrap { padding: 76px var(--gutter) 56px; }
  .doc-meta { grid-template-columns: 1fr 1fr; row-gap: 20px; margin-top: 52px; }
  .doc-tag { display: none; }
  .work { padding: 72px var(--gutter) 80px; text-align: left; }
  .work-info { margin: 0; }
  .work-desc { margin-left: 0; }
  .work-figure { margin-top: 36px; }
  .about .wrap { grid-template-columns: 1fr; gap: 44px; padding: 72px var(--gutter); }
  .portrait-plate { max-width: 300px; }
  .status-table { grid-template-columns: 1fr; gap: 18px; }
  .block { grid-template-columns: 1fr; gap: 12px; padding: 48px 0; }
  .block-no { padding-top: 0; }
  .plate-duo { grid-template-columns: 1fr; }
  .tools-rail { padding: 72px 0 64px; }
  .rail-nav { display: none; }
  .rail { gap: 16px; padding-top: 32px; }
  .rail-card { flex-basis: min(84vw, 540px); }
  .rail-card img, .rc-sheet { height: 240px; }
  .spec-list > div { grid-template-columns: 1fr; gap: 4px; }
  .report-inner { padding: 24px 22px; }
  .report-sheet .row { flex-wrap: wrap; gap: 4px 16px; }
}