/* 锐消 RedactX 介绍站：与应用本身同一套设计语言（近白画布、墨黑主操作、细描边加多层淡阴影、等宽字体做技术标签）。
   全部使用系统字体，不加载外部资源。 */
:root {
  --canvas: #ffffff;
  --canvas-soft: #fafafa;
  --canvas-soft-2: #f5f5f5;
  --ink: #171717;
  --body: #4d4d4d;
  --mute: #7a7a7a;
  --hairline: #ebebeb;
  --primary: #171717;
  --on-primary: #ffffff;
  --link: #0070f3;
  --ring: 0 0 0 1px rgba(0, 0, 0, .08);
  --e4: 0 2px 2px rgba(0, 0, 0, .04), 0 8px 16px -4px rgba(0, 0, 0, .04), var(--ring);
  --e5: 0 1px 1px rgba(0, 0, 0, .02), 0 8px 16px -4px rgba(0, 0, 0, .04), 0 24px 32px -8px rgba(0, 0, 0, .08), var(--ring);
  --c-people: #0070f3;
  --c-org: #7928ca;
  --c-numbers: #f5a623;
  --c-medical: #ff0080;
  --c-handwriting: #ee0000;
  --c-images: #29bc9b;
  --code-bg: #fafafa;
  --glass-hi: rgba(255, 255, 255, .7);
  --sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Monaco, "Noto Sans Mono CJK SC", monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --canvas: #0a0a0b;
  --canvas-soft: #111113;
  --canvas-soft-2: #18181b;
  --ink: #ededed;
  --body: #a1a1a1;
  --mute: #8a8a8a;
  --hairline: #26262a;
  --primary: #ededed;
  --on-primary: #0a0a0b;
  --link: #4ea1ff;
  --ring: 0 0 0 1px rgba(255, 255, 255, .09);
  --e4: 0 8px 16px -4px rgba(0, 0, 0, .5), var(--ring);
  --e5: 0 24px 40px -12px rgba(0, 0, 0, .7), var(--ring);
  --code-bg: #111113;
  --glass-hi: rgba(255, 255, 255, .06);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body { margin: 0; background: var(--canvas); color: var(--ink); font: 15px/1.7 var(--sans); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
img { max-width: 100%; height: auto; display: block; }
code { font: 13px/1.6 var(--mono); }
.ic { width: 16px; height: 16px; flex: none; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.sprite { position: absolute; width: 0; height: 0; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.eyebrow { font: 500 12px/16px var(--mono); letter-spacing: .06em; color: var(--mute); }

/* 顶栏：液态玻璃 */
.topbar { position: sticky; top: 0; z-index: 10; height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 0 24px;
  background: linear-gradient(100deg, color-mix(in srgb, var(--link) 6%, transparent), transparent 45%, color-mix(in srgb, #8b5cf6 5%, transparent)), color-mix(in srgb, var(--canvas) 72%, transparent);
  -webkit-backdrop-filter: blur(20px) saturate(180%); backdrop-filter: blur(20px) saturate(180%);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 1px 0 var(--hairline); }
.brand { display: flex; align-items: center; gap: 8px; text-decoration: none; font-weight: 600; font-size: 17px; letter-spacing: -.02em; white-space: nowrap; }
.brand .dot { color: var(--mute); }
.mark { width: 24px; height: 24px; margin-right: 2px; }
.mark-bg { fill: var(--primary); }
.mark-fg { fill: var(--on-primary); }
.mark-fg.dim { opacity: .55; }
.ver { font: 500 11.5px/1 var(--mono); color: var(--body); padding: 4px 7px; border-radius: 9999px; box-shadow: 0 0 0 1px var(--hairline); margin-left: 4px; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav a { text-decoration: none; color: var(--body); font-size: 14px; padding: 6px 10px; border-radius: 6px; display: inline-flex; align-items: center; gap: 6px; }
.nav a:hover { color: var(--ink); background: var(--canvas-soft-2); }
.theme { border: 0; background: none; color: var(--body); width: 34px; height: 34px; border-radius: 8px; display: grid; place-items: center; cursor: pointer; }
.theme:hover { color: var(--ink); background: var(--canvas-soft-2); }
.theme .sun, [data-theme="dark"] .theme .moon { display: none; }
[data-theme="dark"] .theme .sun { display: block; }

/* 首屏 */
.hero { position: relative; overflow: hidden; padding: 72px 0 64px; }
.mesh { position: absolute; inset: -20% -10% auto 30%; height: 620px; pointer-events: none; opacity: .55; filter: blur(60px);
  background: radial-gradient(40% 50% at 30% 40%, color-mix(in srgb, var(--link) 45%, transparent), transparent 70%),
              radial-gradient(35% 45% at 70% 30%, rgba(139, 92, 246, .4), transparent 70%),
              radial-gradient(35% 40% at 60% 75%, rgba(255, 0, 128, .22), transparent 70%); }
[data-theme="dark"] .mesh { opacity: .35; }
.hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 48px; align-items: center; }
.hero h1 { font-size: 48px; line-height: 1.15; letter-spacing: -.045em; margin: 14px 0 18px; font-weight: 650; }
.lead { color: var(--body); font-size: 16px; margin: 0 0 20px; }
.pills { list-style: none; padding: 0; margin: 0 0 28px; display: grid; gap: 8px; }
.pills li { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--ink); }
.pills .ic { color: var(--link); }
.cta { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 16px; border-radius: 8px; text-decoration: none; font-size: 15px; font-weight: 500;
  box-shadow: 0 0 0 1px var(--hairline); background: var(--canvas); color: var(--ink); transition: background .15s; }
.btn:hover { background: var(--canvas-soft-2); }
.btn.primary { background: var(--primary); color: var(--on-primary); box-shadow: none; }
.btn.primary:hover { background: color-mix(in srgb, var(--primary) 85%, var(--canvas)); }
.demo-note { margin: 14px 0 0; font-size: 12.5px; color: var(--mute); max-width: 460px; }
.nav a.demo-link { color: var(--ink); box-shadow: 0 0 0 1px var(--hairline); }
.hero-shot { margin: 0; }
.hero-shot img, .shot-wide img { border-radius: 12px; box-shadow: var(--e5); }
.shot.dark, [data-theme="dark"] .shot.light { display: none; }
[data-theme="dark"] .shot.dark { display: block; }
figcaption { font-size: 12.5px; color: var(--mute); margin-top: 10px; }

/* 分区 */
.section { padding: 80px 0; }
.section.alt { background: var(--canvas-soft); box-shadow: 0 -1px 0 var(--hairline), 0 1px 0 var(--hairline); }
.head { max-width: 680px; margin-bottom: 36px; }
.head h2 { font-size: 32px; line-height: 1.25; letter-spacing: -.035em; margin: 8px 0 10px; font-weight: 650; }
.head p { color: var(--body); margin: 0; }

.groups { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px; margin-bottom: 40px; }
.group { padding: 16px 18px; border-radius: 10px; box-shadow: var(--ring); background: var(--canvas); }
.group h3 { display: flex; align-items: center; gap: 8px; font-size: 14px; margin: 0 0 6px; }
.group h3 i { width: 8px; height: 8px; border-radius: 50%; }
.g-people { background: var(--c-people); } .g-org { background: var(--c-org); } .g-numbers { background: var(--c-numbers); }
.g-medical { background: var(--c-medical); } .g-handwriting { background: var(--c-handwriting); } .g-images { background: var(--c-images); }
.group p { margin: 0; color: var(--body); font-size: 13.5px; line-height: 1.65; }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.card { padding: 22px; border-radius: 12px; background: var(--canvas); box-shadow: var(--e4); }
.card > .ic { width: 22px; height: 22px; color: var(--link); }
.card h3 { font-size: 16px; margin: 12px 0 6px; letter-spacing: -.01em; }
.card p { margin: 0; color: var(--body); font-size: 14px; }

.steps { counter-reset: s; list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.steps li { counter-increment: s; position: relative; padding: 20px 20px 20px 58px; border-radius: 12px; background: var(--canvas); box-shadow: var(--ring); }
.steps li::before { content: counter(s); position: absolute; left: 18px; top: 18px; width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center;
  font: 600 13px/1 var(--mono); background: var(--primary); color: var(--on-primary); }
.steps b { display: block; margin-bottom: 4px; }
.steps span { color: var(--body); font-size: 14px; }

.stats, .perf { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.perf { grid-template-columns: repeat(3, minmax(0, 1fr)); margin-top: 28px; }
.stat, .perf > div { padding: 18px 20px; border-radius: 10px; box-shadow: var(--ring); }
.stat b, .perf b { display: block; font: 600 26px/1.2 var(--sans); letter-spacing: -.03em; margin-bottom: 4px; }
.stat span, .perf span { color: var(--body); font-size: 13.5px; }
.note { color: var(--mute); font-size: 13px; margin: 14px 0 0; max-width: 820px; }

.deploy { display: grid; grid-template-columns: minmax(0, 1fr); gap: 16px; }
.step, .api { min-width: 0; }
.step h3 { display: flex; align-items: center; gap: 10px; font-size: 16px; margin: 0 0 10px; }
.step .n { width: 24px; height: 24px; border-radius: 50%; display: grid; place-items: center; font: 600 12px/1 var(--mono); background: var(--primary); color: var(--on-primary); }
.step p { color: var(--body); font-size: 14px; margin: 10px 0 0; }
.step p code, .api p code { background: var(--canvas-soft-2); padding: 1px 6px; border-radius: 5px; overflow-wrap: anywhere; }
pre { margin: 0; padding: 16px 18px; border-radius: 10px; background: var(--code-bg); box-shadow: var(--ring); overflow-x: auto; }
pre code { color: var(--ink); white-space: pre; }
.api { margin-top: 32px; }
.api h3 { font-size: 16px; margin: 0 0 10px; }
.shot-wide { margin: 40px 0 0; }

.footer { padding: 36px 0 48px; box-shadow: 0 -1px 0 var(--hairline); }
.foot-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 24px; font-size: 13.5px; }
.foot-grid p { margin: 0 0 6px; }
.muted { color: var(--mute); }

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero h1 { font-size: 38px; }
  .groups, .cards, .steps { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .foot-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 640px) {
  .wrap { padding: 0 16px; }
  .topbar { padding: 0 16px; }
  .nav a:not(.gh):not(.demo-link) { display: none; }
  .nav .gh span { display: none; }
  .ver { display: none; }
  .hero { padding: 48px 0 40px; }
  .hero h1 { font-size: 32px; }
  .section { padding: 56px 0; }
  .head h2 { font-size: 26px; }
  .groups, .cards, .steps, .perf { grid-template-columns: minmax(0, 1fr); }
}