:root {
  --paper: #f4f1e8;
  --paper-deep: #e9e3d5;
  --ink: #20211f;
  --muted: #696b67;
  --line: rgba(32, 33, 31, .16);
  --orange: #e66d4c;
  --green: #27a58b;
  --blue: #477fbd;
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif; font-synthesis: none; }
a { color: inherit; text-decoration: none; }
button, video { font: inherit; }
img, video { display: block; max-width: 100%; }
button:focus-visible, a:focus-visible { outline: 2px solid var(--orange); outline-offset: 4px; }

.workbench-page { width: min(var(--max), calc(100% - 64px)); margin: 0 auto; }
.site-nav { display: flex; justify-content: space-between; align-items: center; padding: 23px 0; border-bottom: 1px solid var(--line); font-size: 13px; }
.site-nav__brand { font-weight: 800; }
.site-nav__links { display: flex; gap: 24px; color: var(--muted); }
.site-nav__links a:hover { color: var(--orange); }
.eyebrow, .section-index { margin: 0; color: var(--orange); font: 10px/1.4 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .1em; text-transform: uppercase; }

.workbench-hero { display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr); gap: 58px; align-items: center; padding: 74px 0 82px; }
.workbench-hero__copy h1 { max-width: 520px; margin: 22px 0 0; font-size: 64px; line-height: 1.14; font-weight: 700; }
.hero-lead { max-width: 480px; margin: 22px 0 0; color: #50514d; font-size: 16px; line-height: 1.9; }
.hero-facts { display: grid; gap: 0; max-width: 480px; margin-top: 34px; border-top: 1px solid var(--line); }
.hero-facts div { display: grid; grid-template-columns: 88px 1fr; gap: 14px; align-items: baseline; padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 12px; }
.hero-facts span { color: var(--muted); }
.hero-facts strong { font-weight: 500; line-height: 1.6; }

.interface-preview { position: relative; min-width: 0; padding: 14px; background: var(--paper-deep); border: 1px solid rgba(32,33,31,.08); }
.interface-preview__top, .interface-preview__caption { display: flex; justify-content: space-between; gap: 14px; align-items: center; color: #666862; font: 9px ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .05em; }
.interface-preview__top { padding: 2px 2px 12px; }
.interface-preview > img { width: 100%; aspect-ratio: 2 / 1; object-fit: contain; background: #fff; cursor: zoom-in; }
.interface-preview__caption { padding: 12px 2px 0; color: var(--ink); }
.preview-zoom { position: absolute; right: 22px; bottom: 56px; display: grid; width: 36px; height: 36px; place-items: center; border: 0; color: #fff; background: rgba(24,26,25,.82); cursor: pointer; font-size: 20px; }
.preview-zoom:hover { background: var(--orange); }

.interface-section, .demo-section { padding: 80px 0 92px; border-top: 1px solid var(--line); }
.section-title { display: grid; grid-template-columns: 110px minmax(0, 1fr); gap: 24px; align-items: start; margin-bottom: 34px; }
.section-index { padding-top: 8px; }
.section-title h2 { max-width: 760px; margin: 0; font-size: 42px; line-height: 1.2; font-weight: 650; }
.section-title > div > p { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.interface-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.interface-tab { position: relative; display: grid; grid-template-columns: 34px minmax(0, 1fr); grid-template-rows: auto auto; gap: 5px 12px; min-width: 0; padding: 18px 18px 20px 0; text-align: left; border: 0; border-right: 1px solid var(--line); color: var(--muted); background: transparent; cursor: pointer; }
.interface-tab + .interface-tab { padding-left: 18px; }
.interface-tab:last-child { border-right: 0; }
.interface-tab > span { grid-row: 1 / span 2; color: #858780; font: 11px ui-monospace, SFMono-Regular, Consolas, monospace; padding-top: 3px; }
.interface-tab strong { color: var(--ink); font-size: 15px; font-weight: 600; }
.interface-tab small { color: var(--muted); font-size: 11px; line-height: 1.5; }
.interface-tab.is-active::after { position: absolute; right: 0; bottom: -1px; left: 0; height: 3px; background: var(--orange); content: ''; }
.interface-tab.is-active > span, .interface-tab.is-active strong { color: var(--orange); }
.interface-panel { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(260px, .55fr); gap: 42px; align-items: center; padding-top: 28px; }
.interface-image-button { display: block; min-width: 0; padding: 0; border: 1px solid var(--line); background: #fff; cursor: zoom-in; }
.interface-image-button img { width: 100%; aspect-ratio: 2 / 1; object-fit: contain; }
.interface-copy h3 { margin: 14px 0 12px; font-size: 25px; line-height: 1.35; font-weight: 650; }
.interface-copy > p:not(.eyebrow) { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
.text-link { display: inline-flex; gap: 12px; align-items: center; margin-top: 24px; padding-bottom: 8px; border-bottom: 1px solid var(--ink); font-size: 13px; }
.text-link:hover { color: var(--orange); border-color: var(--orange); }

.workflow-section { margin: 0 calc((min(var(--max), 100vw - 64px) - 100vw) / 2); padding: 82px max(32px, calc((100vw - var(--max)) / 2)) 88px; background: #222522; color: #f4f2eb; }
.section-title--light .section-index { color: #f3a687; }
.section-title--light h2 { color: #f4f2eb; }
.section-title--light > div > p { color: #b9bbb4; }
.workflow-list { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); margin: 42px 0 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); }
.workflow-list li { display: grid; grid-template-columns: 30px 1fr; gap: 12px; min-height: 150px; padding: 18px 18px 20px 0; border-right: 1px solid rgba(255,255,255,.18); }
.workflow-list li + li { padding-left: 18px; }
.workflow-list li:last-child { border-right: 0; }
.workflow-list li > span { color: #f3a687; font: 11px ui-monospace, SFMono-Regular, Consolas, monospace; }
.workflow-list h3 { margin: 0 0 10px; color: #fff; font-size: 17px; font-weight: 600; }
.workflow-list p { margin: 0; color: #b9bbb4; font-size: 12px; line-height: 1.75; }
.workflow-evidence { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; margin-top: 34px; }
.workflow-evidence > div { display: flex; gap: 14px; align-items: center; }
.evidence-number { color: #f3a687; font-size: 32px; font-weight: 600; }
.workflow-evidence p { max-width: 180px; margin: 0; color: #c6c7c0; font-size: 11px; line-height: 1.6; }

.demo-player { margin: 0; padding: 16px; background: var(--paper-deep); }
.demo-player video { width: 100%; max-height: 75vh; object-fit: contain; background: #121412; }
.demo-player figcaption { display: flex; justify-content: space-between; gap: 16px; padding: 12px 2px 0; color: var(--muted); font-size: 11px; }
.workbench-footer { display: flex; justify-content: space-between; gap: 30px; align-items: end; padding: 58px 0 48px; border-top: 1px solid var(--line); }
.workbench-footer h2 { margin: 14px 0 0; font-size: 40px; line-height: 1.28; font-weight: 650; }
.footer-link { display: inline-flex; gap: 14px; padding-bottom: 8px; border-bottom: 1px solid var(--ink); font-size: 13px; white-space: nowrap; }
.footer-link:hover { color: var(--orange); border-color: var(--orange); }

.image-dialog { position: relative; width: min(1320px, calc(100vw - 32px)); max-width: none; max-height: 92vh; padding: 46px 16px 14px; border: 0; background: #171917; color: #fff; }
.image-dialog::backdrop { background: rgba(10, 12, 10, .82); }
.image-dialog > img { width: 100%; max-height: calc(92vh - 92px); object-fit: contain; background: #fff; }
.image-dialog > p { margin: 10px 2px 0; color: #d4d4cf; font-size: 12px; }
.image-dialog__close { position: absolute; top: 6px; right: 10px; width: 34px; height: 34px; border: 0; color: #fff; background: transparent; font-size: 28px; cursor: pointer; }

@media (max-width: 900px) {
  .workbench-page { width: min(100% - 40px, var(--max)); }
  .workbench-hero { grid-template-columns: 1fr; gap: 36px; padding: 58px 0 66px; }
  .workbench-hero__copy h1 { max-width: 680px; font-size: 52px; }
  .hero-lead { max-width: 660px; }
  .interface-panel { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .interface-copy { max-width: 640px; }
  .workflow-section { margin: 0 -20px; padding: 68px 20px 72px; }
  .workflow-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .workflow-list li:nth-child(2) { border-right: 0; }
  .workflow-list li:nth-child(n+3) { border-top: 1px solid rgba(255,255,255,.18); }
  .workflow-list li:nth-child(3) { padding-left: 0; }
}

@media (max-width: 560px) {
  .site-nav { padding: 18px 0; }
  .site-nav__links { gap: 14px; font-size: 11px; }
  .site-nav__links a:nth-child(2) { display: none; }
  .workbench-hero { padding: 48px 0 54px; }
  .workbench-hero__copy h1 { margin-top: 16px; font-size: 40px; line-height: 1.2; }
  .hero-lead { margin-top: 16px; font-size: 14px; }
  .hero-facts div { grid-template-columns: 72px 1fr; font-size: 11px; }
  .interface-preview { padding: 9px; }
  .interface-preview__top, .interface-preview__caption { font-size: 8px; }
  .preview-zoom { right: 16px; bottom: 48px; width: 32px; height: 32px; }
  .interface-section, .demo-section { padding: 58px 0 64px; }
  .section-title { grid-template-columns: 1fr; gap: 10px; margin-bottom: 26px; }
  .section-index { padding-top: 0; }
  .section-title h2 { font-size: 30px; line-height: 1.3; }
  .section-title > div > p { margin-top: 8px; font-size: 12px; }
  .interface-tabs { grid-template-columns: 1fr; }
  .interface-tab, .interface-tab + .interface-tab { grid-template-columns: 34px 1fr; padding: 13px 8px; border-right: 0; border-bottom: 1px solid var(--line); }
  .interface-tab:last-child { border-bottom: 0; }
  .interface-tab > span { grid-row: 1 / span 2; }
  .interface-tab strong { font-size: 14px; }
  .interface-tab small { font-size: 10px; }
  .interface-panel { padding-top: 18px; }
  .interface-copy h3 { font-size: 21px; }
  .interface-copy > p:not(.eyebrow) { font-size: 13px; }
  .workflow-section { padding: 56px 20px 62px; }
  .workflow-list { margin-top: 28px; }
  .workflow-list li { grid-template-columns: 24px 1fr; gap: 8px; min-height: 142px; padding-right: 10px; }
  .workflow-list li + li { padding-left: 10px; }
  .workflow-list li:nth-child(3) { padding-left: 0; }
  .workflow-list h3 { font-size: 14px; }
  .workflow-list p { font-size: 11px; }
  .workflow-evidence { gap: 10px; margin-top: 24px; }
  .workflow-evidence > div { display: grid; gap: 4px; align-content: start; }
  .evidence-number { font-size: 26px; }
  .workflow-evidence p { font-size: 10px; }
  .demo-player { padding: 9px; }
  .demo-player figcaption { font-size: 9px; }
  .workbench-footer { display: grid; grid-template-columns: 1fr; gap: 24px; padding: 42px 0 36px; }
  .workbench-footer h2 { font-size: 30px; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }