:root {
  --ink: #07131a;
  --ink-soft: #0f2028;
  --paper: #f2f4ef;
  --paper-muted: #dbe1da;
  --line: #b8c1b7;
  --lime: #b7d638;
  --cyan: #44b9c5;
  --orange: #e7773e;
  --white: #ffffff;
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif; line-height: 1.5; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.section-shell { width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; }
.site-header { width: min(calc(100% - 48px), var(--max-width)); min-height: 76px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 800; letter-spacing: 0; }
.brand small { display: block; color: #54707a; font-size: 9px; font-weight: 700; letter-spacing: 1.3px; }
.brand-mark { display: grid; place-items: center; width: 31px; height: 31px; background: var(--ink); color: var(--lime); font-size: 18px; }
nav { display: flex; gap: 22px; color: #44555b; font-size: 13px; }
nav a:hover, .header-link:hover, .site-footer a:hover { color: #126e78; }
.header-link { border-bottom: 1px solid var(--ink); font-size: 13px; font-weight: 700; }

.hero { display: grid; grid-template-columns: 0.92fr 1.08fr; gap: 54px; padding: 72px 0 84px; align-items: center; }
.eyebrow { margin: 0 0 14px; color: #557078; font-size: 11px; font-weight: 800; letter-spacing: 1.4px; }
.status-dot { display: inline-block; width: 8px; height: 8px; margin-right: 7px; background: var(--lime); vertical-align: 1px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 22px; color: var(--ink); font-size: 56px; line-height: 1.04; letter-spacing: 0; }
h2 { margin-bottom: 0; color: var(--ink); font-size: 37px; line-height: 1.13; letter-spacing: 0; }
.hero-lede { max-width: 470px; margin-bottom: 28px; color: #41545a; font-size: 17px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 48px; }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; padding: 10px 16px; border: 1px solid var(--ink); font-size: 14px; font-weight: 800; }
.button-primary { background: var(--ink); color: var(--white); }
.button-primary:hover { background: #19414b; }
.button-secondary:hover { background: var(--lime); }
.signal-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0; }
.signal-list div { border-top: 2px solid var(--ink); padding-top: 8px; }
.signal-list dt { color: #63767a; font-size: 10px; font-weight: 800; letter-spacing: 1px; }
.signal-list dd { margin: 3px 0 0; font-size: 13px; }
.signal-list strong { display: block; color: var(--ink); font-size: 17px; }
.hero-visual { position: relative; min-height: 500px; overflow: hidden; background: var(--ink); border: 1px solid var(--ink); }
.hero-visual::before { content: "AGIC / DATA → MODEL → DELIVERY"; position: absolute; z-index: 1; top: 20px; left: 20px; padding: 6px 8px; background: var(--lime); color: var(--ink); font-size: 10px; font-weight: 800; letter-spacing: 1.1px; }
.hero-visual img { width: 100%; height: 500px; object-fit: cover; object-position: 52% top; opacity: 0.86; }
.visual-caption { position: absolute; z-index: 1; bottom: 0; left: 0; right: 0; display: flex; gap: 13px; padding: 16px 20px; background: var(--ink); color: var(--white); font-size: 11px; font-weight: 700; letter-spacing: 0.8px; }
.visual-caption span { color: var(--lime); }

.capability-section, .model-section, .cases-section, .stack-section { padding: 92px 0; border-top: 1px solid var(--line); }
.capability-section { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 68px; }
.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--line); }
.capability-grid article { min-height: 190px; padding: 20px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.index { color: #71939a; font-size: 12px; font-weight: 800; }
.capability-grid h3 { margin: 35px 0 8px; font-size: 19px; }
.capability-grid p { margin-bottom: 0; color: #506267; font-size: 14px; }

.section-heading-row { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.section-note { max-width: 320px; margin-bottom: 4px; color: #5b6c70; font-size: 14px; }
.model-board { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 40px; border: 1px solid var(--ink); background: var(--ink); gap: 1px; }
.model-card { min-height: 178px; padding: 20px; background: #e4e9e3; }
.model-card p { color: #62727a; font-size: 10px; font-weight: 800; letter-spacing: 1.2px; }
.model-card h3 { margin: 42px 0 6px; font-size: 19px; line-height: 1.1; }
.model-card span { color: #46565b; font-size: 13px; }
.model-main { grid-column: span 2; background: var(--lime); }
.model-main h3, .model-train h3 { font-size: 26px; }
.model-train { grid-column: span 2; background: var(--cyan); }

.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 40px; }
.case-card { position: relative; min-height: 450px; overflow: hidden; background: var(--ink); }
.case-agic { grid-column: 1 / -1; }
.case-card img { width: 100%; height: 450px; object-fit: cover; object-position: top center; opacity: 0.62; transition: opacity 180ms ease, transform 180ms ease; }
.case-card:hover img { opacity: 0.83; transform: scale(1.025); }
.case-content { position: absolute; left: 0; right: 0; bottom: 0; padding: 20px; background: var(--ink); color: var(--white); }
.case-content p { margin-bottom: 8px; color: var(--lime); font-size: 10px; font-weight: 800; letter-spacing: 1px; }
.case-content h3 { margin-bottom: 5px; font-size: 22px; }
.case-content span { display: block; color: #c5d1cb; font-size: 13px; }
.case-content a { display: inline-block; margin-top: 14px; border-bottom: 1px solid var(--lime); color: var(--lime); font-size: 13px; font-weight: 700; }

.stack-section { padding-bottom: 104px; }
.stack-table { margin-top: 40px; border-top: 2px solid var(--ink); }
.stack-row { display: grid; grid-template-columns: 1fr 1.35fr 1fr; gap: 24px; padding: 17px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
.stack-row strong { font-size: 16px; }
.stack-header { color: #607276; font-size: 11px; font-weight: 800; letter-spacing: 1px; }
.delivery-section { background: var(--ink); color: var(--white); }
.delivery-inner { padding: 88px 0; }
.delivery-inner .eyebrow { color: var(--lime); }
.delivery-inner h2 { color: var(--white); }
.delivery-grid { display: grid; grid-template-columns: 1fr auto; gap: 50px; align-items: end; margin-top: 35px; }
.delivery-grid p { max-width: 560px; margin: 0; color: #bed0ca; font-size: 17px; }
.delivery-grid .button-primary { background: var(--lime); color: var(--ink); border-color: var(--lime); }
.delivery-grid .button-primary:hover { background: var(--white); border-color: var(--white); }
.site-footer { display: flex; justify-content: space-between; gap: 20px; padding: 24px 0; color: #617075; font-size: 12px; }

@media (max-width: 820px) {
  .section-shell, .site-header { width: min(calc(100% - 32px), var(--max-width)); }
  .site-header { min-height: 66px; gap: 12px; }
  nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 38px; padding: 50px 0 62px; }
  h1 { font-size: 43px; }
  h2 { font-size: 32px; }
  .hero-visual, .hero-visual img { min-height: 380px; height: 380px; }
  .capability-section { grid-template-columns: 1fr; gap: 34px; }
  .section-heading-row, .delivery-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
  .model-board { grid-template-columns: repeat(2, 1fr); }
  .model-main, .model-train { grid-column: span 2; }
  .case-grid { grid-template-columns: 1fr; }
  .case-card, .case-card img { min-height: 390px; height: 390px; }
  .stack-row { grid-template-columns: 0.85fr 1.15fr; gap: 12px; }
  .stack-row span:last-child { grid-column: 2; }
  .stack-header span:last-child { display: none; }
  .site-footer { flex-direction: column; }
}

@media (max-width: 480px) {
  .header-link { font-size: 12px; }
  .signal-list { gap: 9px; }
  .signal-list dd, .signal-list strong { font-size: 13px; }
  .capability-grid { grid-template-columns: 1fr; }
  .model-board { grid-template-columns: 1fr; }
  .model-main, .model-train { grid-column: span 1; }
  .model-card { min-height: 145px; }
  .model-card h3 { margin-top: 24px; }
}