/* ==========================================================================
   Projects / Experience / Skills / Contact / Detail / 响应式
   ========================================================================== */

/* ---------- Projects ---------- */
.proj-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(300px, 400px); gap: 48px; align-items: start; }
.proj-list { border-top: 1px solid var(--paper-line); }
.proj-row { position: relative; border-bottom: 1px solid var(--paper-line); }
.proj-row::before {
  content: ""; position: absolute; left: 0; top: -1px; width: 2px; height: calc(100% + 1px);
  background: var(--gold-deep); transform: scaleY(0); transform-origin: top; transition: transform .25s var(--ease);
}
.proj-row.is-active::before { transform: scaleY(1); }
.proj-open {
  display: grid; grid-template-columns: 48px minmax(0, 1fr) auto; gap: 8px 20px; align-items: start;
  width: 100%; padding: 28px 8px 28px 20px; text-align: left; transition: background .2s;
}
.proj-row.is-active .proj-open, .proj-open:hover { background: rgba(32, 38, 44, .035); }
.proj-no { font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--text-dark-2); padding-top: 10px; }
.proj-title { font-family: var(--font-display); font-weight: 400; font-size: clamp(24px, 3vw, 36px); line-height: 1.2; }
.proj-type { margin-top: 4px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--text-dark-2); }
.proj-summary { margin-top: 10px; font-size: 15px; color: var(--text-dark-2); max-width: 56ch; }
.proj-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.tag { display: inline-flex; align-items: center; min-height: 26px; padding: 0 10px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; border: 1px solid var(--paper-line); border-radius: 13px; color: var(--text-dark-2); transition: border-color .2s, color .2s, background .2s; }
.tag.is-on { border-color: var(--gold-deep); color: var(--gold-deep); background: rgba(143, 90, 28, .08); }
.proj-go { align-self: center; display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-size: 14px; white-space: nowrap; }
.proj-go .arrow { transition: transform .2s var(--ease); }
.proj-open:hover .proj-go .arrow, .proj-open:focus-visible .proj-go .arrow { transform: translateX(3px); }

.proj-preview { position: sticky; top: calc(var(--header-h) + 24px); }
.preview-card { background: var(--ink); color: var(--text-light); padding: 22px 22px 18px; border-radius: 2px; overflow: hidden; }
.preview-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--steel); }
.preview-title { margin-top: 10px; font-family: var(--font-display); font-size: 22px; line-height: 1.3; }
.preview-svg { width: 100%; height: auto; margin-top: 8px; overflow: visible; }
.pv-link { stroke: var(--gold); stroke-width: 1; opacity: .55; fill: none; transition: opacity .3s; }
.pv-node circle { fill: var(--ink); stroke: var(--mist); stroke-width: 1; }
.pv-node.is-hub circle { stroke: var(--gold); fill: var(--gold); }
.pv-node text { fill: var(--text-light); font-family: var(--font-mono); font-size: 11px; text-anchor: middle; }
.pv-node, .pv-link { transition: transform .45s var(--ease), opacity .3s; }
.reduce-motion .pv-node, .reduce-motion .pv-link { transition: none; }
.preview-meta { margin-top: 6px; padding-top: 14px; border-top: 1px solid var(--ink-line); display: grid; grid-template-columns: auto 1fr; gap: 6px 14px; font-size: 13px; color: var(--text-light-2); }
.preview-meta dt { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--steel); padding-top: 2px; }
.preview-note { margin-top: 12px; font-family: var(--font-mono); font-size: 10px; letter-spacing: .1em; color: var(--steel); }
.preview-inline { display: none; }

/* ---------- Experience ---------- */
.tl { position: relative; border-top: 1px solid var(--paper-line); }
.tl-item { position: relative; border-bottom: 1px solid var(--paper-line); }
.tl-head { display: grid; grid-template-columns: 180px minmax(0, 1fr) 40px; gap: 12px 24px; align-items: center; width: 100%; text-align: left; padding: 26px 0; min-height: 44px; }
.tl-period { font-family: var(--font-mono); font-size: 13px; letter-spacing: .06em; color: var(--text-dark-2); display: flex; align-items: center; gap: 12px; }
.tl-period::before { content: ""; width: 9px; height: 9px; border: 1px solid var(--text-dark-2); border-radius: 50%; background: var(--paper); transition: background .2s, border-color .2s; flex: none; }
.tl-item:hover .tl-period::before, .tl-item.is-open .tl-period::before { background: var(--gold-deep); border-color: var(--gold-deep); }
.tl-title { font-family: var(--font-display); font-size: clamp(20px, 2.2vw, 26px); line-height: 1.3; }
.tl-org { font-size: 14px; color: var(--text-dark-2); margin-top: 2px; }
.tl-toggle { justify-self: end; position: relative; width: 24px; height: 24px; }
.tl-toggle::before, .tl-toggle::after { content: ""; position: absolute; left: 4px; right: 4px; top: 11px; height: 1.5px; background: currentColor; transition: transform .25s var(--ease); }
.tl-toggle::after { transform: rotate(90deg); }
.tl-item.is-open .tl-toggle::after { transform: rotate(0); }
.tl-body { display: grid; grid-template-rows: 0fr; transition: grid-template-rows .3s var(--ease); }
.tl-item.is-open .tl-body { grid-template-rows: 1fr; }
.reduce-motion .tl-body { transition: none; }
.tl-body > div { overflow: hidden; }
.tl-body-in { padding: 0 0 28px 204px; }
.tl-sum { color: var(--text-dark-2); max-width: 62ch; }
.tl-detail { margin-top: 10px; max-width: 62ch; }
.tl-rel { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 16px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--text-dark-2); }
.tl-rel button { min-height: 32px; padding: 0 12px; border: 1px solid var(--paper-line); border-radius: 16px; font-family: var(--font-body); font-size: 13px; letter-spacing: 0; color: var(--text-dark); transition: border-color .2s, color .2s; }
.tl-rel button:hover { border-color: var(--gold-deep); color: var(--gold-deep); }

/* ---------- Skills ---------- */
.skill-groups { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 40px 48px; }
.skill-group h3 { font-family: var(--font-mono); font-weight: 400; font-size: 11px; letter-spacing: .2em; color: var(--steel); padding-bottom: 12px; border-bottom: 1px solid var(--ink-line); margin-bottom: 14px; }
.skill-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { min-height: 40px; padding: 0 16px; font-size: 14px; border: 1px solid var(--ink-line); border-radius: 20px; color: var(--text-light); transition: border-color .2s, background .2s, color .2s; }
.chip:hover, .chip.is-on { border-color: var(--gold); color: var(--gold); background: rgba(223, 166, 106, .08); }
.skill-result { margin-top: 48px; min-height: 76px; padding-top: 20px; border-top: 1px solid var(--ink-line); font-size: 14px; color: var(--text-light-2); }
.skill-result .lbl { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--steel); margin-right: 12px; }
.skill-result a, .skill-result button { display: inline-flex; align-items: center; min-height: 36px; margin: 6px 14px 0 0; padding: 0 2px; border-bottom: 1px solid var(--gold); color: var(--text-light); }
.skill-result a:hover, .skill-result button:hover { color: var(--gold); }

/* ---------- Contact ---------- */
.contact { position: relative; min-height: 70vh; display: flex; align-items: center; overflow: hidden; }
.contact-canvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; opacity: .5; }
.contact .sec-inner { position: relative; z-index: 1; width: 100%; }
.big-l { position: relative; width: clamp(54px, 8vw, 96px); height: clamp(72px, 10.5vw, 128px); margin-bottom: 36px; }
.big-l::before, .big-l::after { content: ""; position: absolute; background: var(--gold); }
.big-l::before { left: 0; top: 0; width: 4px; height: 100%; }
.big-l::after { left: 0; bottom: 0; width: 68%; height: 4px; }
.contact h2 { font-family: var(--font-display); font-weight: 400; font-size: clamp(36px, 6vw, 80px); line-height: 1.1; letter-spacing: -.02em; }
.contact .sec-lead { margin-top: 16px; max-width: 48ch; }
.contact-list { margin-top: 36px; display: grid; gap: 0; max-width: 560px; border-top: 1px solid var(--ink-line); }
.contact-list li { display: flex; justify-content: space-between; align-items: center; gap: 16px; min-height: 56px; border-bottom: 1px solid var(--ink-line); }
.contact-list .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--steel); }
.contact-list a, .contact-list button { min-height: 44px; display: inline-flex; align-items: center; gap: 10px; }
.contact-list a:hover, .contact-list button:hover { color: var(--gold); }
.contact-empty { margin-top: 36px; display: inline-flex; align-items: center; gap: 12px; min-height: 52px; padding: 0 18px; border: 1px dashed var(--ink-line); font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; color: var(--steel); }
.site-foot { padding: 28px var(--gutter); background: var(--ink); border-top: 1px solid var(--ink-line); display: flex; justify-content: space-between; gap: 16px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--steel); }
.site-foot a { display: inline-flex; align-items: center; min-height: 36px; }
.site-foot a:hover { color: var(--gold); }

/* ---------- 项目详情（覆盖层，可通过 #/project/<id> 直达） ---------- */
.detail { position: fixed; inset: 0; z-index: 80; overflow-y: auto; overscroll-behavior: contain; background: var(--paper); color: var(--text-dark); animation: detail-in .35s var(--ease); }
.detail[hidden] { display: none; }
.reduce-motion .detail { animation: none; }
@keyframes detail-in { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
.detail-bar { position: sticky; top: 0; z-index: 2; display: flex; justify-content: space-between; align-items: center; gap: 12px; height: var(--header-h); padding: 0 var(--gutter); background: rgba(238, 233, 221, .92); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); border-bottom: 1px solid var(--paper-line); }
.detail-back { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; font-size: 14px; }
.detail-back .arrow { transition: transform .2s var(--ease); }
.detail-back:hover .arrow { transform: translateX(-3px); }
.detail-nav { display: flex; gap: 4px; font-family: var(--font-mono); font-size: 12px; letter-spacing: .08em; }
.detail-nav button { min-height: 44px; padding: 0 12px; color: var(--text-dark-2); }
.detail-nav button:hover { color: var(--text-dark); }
.detail-in { max-width: 1040px; margin: 0 auto; padding: clamp(40px, 7vw, 88px) var(--gutter) 120px; }
.detail-kicker { font-family: var(--font-mono); font-size: 12px; letter-spacing: .16em; color: var(--text-dark-2); }
.detail h1 { margin-top: 14px; font-family: var(--font-display); font-weight: 400; font-size: clamp(36px, 6vw, 72px); line-height: 1.1; letter-spacing: -.02em; }
.detail-sum { margin-top: 20px; max-width: 60ch; font-size: 17px; color: var(--text-dark-2); }
.detail-stack { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 22px; }
.detail-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.detail-links a { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; border-bottom: 1px solid var(--gold-deep); }
.detail-shot { margin-top: 44px; aspect-ratio: 16 / 9; background: var(--paper-2); border: 1px solid var(--paper-line); overflow: hidden; display: grid; place-items: center; }
.detail-shot img { width: 100%; height: 100%; object-fit: cover; }
.shot-ph { font-family: var(--font-mono); font-size: 12px; letter-spacing: .14em; color: var(--text-dark-2); text-align: center; padding: 24px; }
.shot-ph svg { margin: 0 auto 14px; opacity: .45; }
.detail-blocks { margin-top: 56px; display: grid; gap: 0; border-top: 1px solid var(--paper-line); }
.dblock { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 12px 40px; padding: 28px 0; border-bottom: 1px solid var(--paper-line); }
.dblock h2 { font-family: var(--font-mono); font-weight: 400; font-size: 12px; letter-spacing: .16em; color: var(--text-dark-2); padding-top: 4px; }
.dblock h2 b { display: block; margin-top: 4px; font-family: var(--font-display); font-weight: 400; font-size: 20px; letter-spacing: 0; color: var(--text-dark); }
.dblock p { max-width: 62ch; }

/* 架构图：层可展开，点击节点高亮相连关系，说明保持在平面 HTML 中 */
.arch { margin-top: 56px; }
.arch-head { display: flex; justify-content: space-between; align-items: end; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.arch-head h2 { font-family: var(--font-display); font-weight: 400; font-size: 28px; }
.arch-ctl { display: flex; gap: 8px; }
.arch-ctl button { min-height: 40px; padding: 0 16px; font-size: 13px; border: 1px solid var(--paper-line); border-radius: 20px; transition: border-color .2s, background .2s; }
.arch-ctl button:hover { border-color: var(--text-dark); }
.arch-ctl button[aria-pressed="true"] { background: var(--text-dark); color: var(--paper); border-color: var(--text-dark); }
.arch-stage { background: var(--ink); color: var(--text-light); padding: clamp(20px, 3vw, 36px); border-radius: 2px; overflow: hidden; }
.arch-layers { position: relative; display: grid; gap: 14px; transition: gap .8s var(--ease); }
.reduce-motion .arch-layers { transition: none; }
.arch-layers.is-spread { gap: 34px; }
.arch-layer { position: relative; display: grid; grid-template-columns: 100px minmax(0, 1fr); gap: 16px; align-items: center; padding: 16px 18px; border: 1px solid var(--ink-line); background: rgba(237, 232, 222, .03); transition: transform .8s var(--ease), border-color .3s; }
.arch-layers:not(.is-spread) .arch-layer { margin-top: -6px; }
.arch-layers:not(.is-spread) .arch-layer:first-child { margin-top: 0; }
.reduce-motion .arch-layer { transition: none; }
.arch-lname { font-family: var(--font-mono); font-size: 11px; letter-spacing: .14em; color: var(--steel); }
.arch-nodes { display: flex; flex-wrap: wrap; gap: 10px; }
.anode { position: relative; min-height: 44px; padding: 0 18px; border: 1px solid var(--mist); color: var(--text-light); font-size: 14px; border-radius: 2px; transition: border-color .25s, background .25s, color .25s, opacity .25s; }
.anode:hover { background: rgba(168, 184, 212, .1); }
.anode.is-sel { border-color: var(--gold); background: rgba(223, 166, 106, .14); color: var(--gold); }
.anode.is-rel { border-color: var(--gold); }
.arch-stage.has-sel .anode:not(.is-sel):not(.is-rel) { opacity: .4; }
.arch-link-svg { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; z-index: 1; }
.arch-link-svg path { fill: none; stroke: var(--gold); stroke-width: 1; opacity: 0; transition: opacity .3s; }
.arch-link-svg path.on { opacity: .8; }
.arch-link-svg circle { fill: var(--gold); }
.arch-note { margin-top: 18px; min-height: 64px; padding: 14px 18px; border: 1px solid var(--ink-line); font-size: 14px; color: var(--text-light-2); }
.arch-note b { display: block; margin-bottom: 4px; font-family: var(--font-mono); font-weight: 400; font-size: 11px; letter-spacing: .14em; color: var(--gold); }
.arch-cap { margin-top: 12px; font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--text-dark-2); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .proj-layout { grid-template-columns: 1fr; }
  .proj-preview { display: none; }
  .preview-inline { display: block; }
  .sec-head { grid-template-columns: 1fr; }
  .tl-body-in { padding-left: 0; }
  .tl-head { grid-template-columns: 1fr 40px; }
  .tl-period { grid-column: 1 / -1; }
}
@media (max-width: 820px) {
  :root { --header-h: 56px; }
  .menu-btn { display: inline-flex; align-items: center; }
  .nav {
    position: fixed; inset: var(--header-h) 0 auto 0; flex-direction: column; gap: 0; padding: 8px var(--gutter) 20px;
    background: rgba(11, 16, 21, .97); border-bottom: 1px solid var(--ink-line);
    transform: translateY(-8px); opacity: 0; visibility: hidden; transition: opacity .2s, transform .2s, visibility .2s;
  }
  .nav.is-open { transform: none; opacity: 1; visibility: visible; }
  .nav a { min-height: 52px; font-size: 16px; border-bottom: 1px solid var(--ink-line); }
  .nav a::after { display: none; }
  .tool-text { display: none; }
  .hero-inner { grid-template-columns: minmax(0, 1fr); }
  .avatar { order: -1; width: 104px; }
  .hero-hint { display: none; }
  .proj-open { grid-template-columns: 1fr; padding: 24px 4px 24px 16px; }
  .proj-no { padding-top: 0; }
  .proj-go { justify-self: start; }
  .dblock { grid-template-columns: 1fr; }
  .arch-layer { grid-template-columns: 1fr; gap: 10px; }
}
@media (hover: none) { .btn:hover .arrow { transform: none; } }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .detail { animation: none; }
}