:root {
  --bg: #fafaf8;
  --paper: #fff;
  --ink: #111318;
  --sub: #5b616e;
  --faint: #959ba6;
  --line: #e8e7e2;
  --line-2: #efeee9;
  --accent: #2f5bea;
  --accent-2: #6b8cff;
  --accent-soft: #edf1fe;
  --ok: #1a8456; --ok-soft: #e4f4eb;
  --warn: #a5650c; --warn-soft: #fcf0da;
  --hold: #6a4bdc; --hold-soft: #f0ebfe;
  --bad: #c2412d; --bad-soft: #fdecea;
  --mute-soft: #f1f1ec;
  --max: 1160px;
  --font: "Segoe UI", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --mono: "Cascadia Mono", "JetBrains Mono", Consolas, "Microsoft YaHei", monospace;
  --shadow-lg: 0 1px 2px rgba(17,19,24,.04), 0 24px 60px -24px rgba(17,19,24,.22);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.7 var(--font); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
a { color: inherit; }
h1, h2, h3, h4, h5 { margin: 0; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--ink); color: #fff; padding: 8px 14px; border-radius: 8px; z-index: 99; }
.skip:focus { left: 12px; }

/* ---------- 导航 ---------- */
.nav { position: sticky; top: 0; z-index: 30; background: rgba(250,250,248,.8); backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px); border-bottom: 1px solid transparent; transition: border-color .2s, background .2s; }
.nav.scrolled { border-bottom-color: var(--line); background: rgba(250,250,248,.92); }
.nav-inner { max-width: var(--max); margin: 0 auto; padding: 0 24px; height: 64px; display: flex; align-items: center; gap: 40px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; text-decoration: none; font-size: 16px; letter-spacing: .01em; }
.mark { width: 22px; height: 22px; border-radius: 7px; background: linear-gradient(140deg, var(--accent), var(--accent-2)); position: relative; }
.mark::after { content: ""; position: absolute; inset: 6px; border-radius: 3px; background: rgba(255,255,255,.85); }
.nav-links { display: flex; gap: 28px; font-size: 14px; color: var(--sub); }
.nav-links a { text-decoration: none; transition: color .15s; }
.nav-links a:hover { color: var(--ink); }
.nav-cta { margin-left: auto; display: flex; gap: 8px; align-items: center; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 10px; padding: 10px 18px; font-size: 15px; font-weight: 600; text-decoration: none; border: 1px solid transparent; white-space: nowrap; transition: background .15s, border-color .15s, box-shadow .15s, transform .15s; }
.btn.sm { padding: 7px 14px; font-size: 14px; border-radius: 9px; }
.btn.lg { padding: 13px 24px; font-size: 16px; border-radius: 12px; }
.btn.solid { background: var(--ink); color: #fff; box-shadow: 0 1px 0 rgba(255,255,255,.12) inset, 0 6px 16px -6px rgba(17,19,24,.5); }
.btn.solid:hover { background: #23262e; transform: translateY(-1px); }
.btn.ghost { background: var(--paper); border-color: var(--line); box-shadow: 0 1px 2px rgba(17,19,24,.04); }
.btn.ghost:hover { border-color: #d3d2cb; }
.btn.text { background: none; color: var(--sub); }
.btn.text:hover { color: var(--ink); }
.tri { width: 22px; height: 22px; border-radius: 50%; background: var(--accent-soft); position: relative; }
.tri::after { content: ""; position: absolute; left: 8px; top: 6px; border-left: 8px solid var(--accent); border-top: 5px solid transparent; border-bottom: 5px solid transparent; }
.menu { display: none; background: none; border: 0; width: 38px; height: 38px; flex-direction: column; justify-content: center; gap: 6px; padding: 9px; }
.menu span { display: block; height: 2px; background: var(--ink); border-radius: 2px; }

/* ---------- 通用区段 ---------- */
section { padding: 120px 24px; }
section > * { max-width: var(--max); margin-left: auto; margin-right: auto; }
.head { margin-bottom: 56px; }
.head > * { max-width: 720px; }
.head.center { text-align: center; }
.head.center > * { margin-left: auto; margin-right: auto; }
.eyebrow { margin: 0 0 14px; font-size: 14px; font-weight: 600; color: var(--accent); letter-spacing: .02em; }
.head h2 { font-size: clamp(30px, 3.4vw, 44px); line-height: 1.25; font-weight: 700; letter-spacing: -.01em; }
.head p:not(.eyebrow) { color: var(--sub); font-size: 17px; margin: 18px 0 0; }
.head a { color: var(--accent); text-decoration: none; }

/* ---------- 首屏 ---------- */
.hero { position: relative; padding: 96px 24px 56px; text-align: center; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: -40% -10% auto; height: 760px; background: radial-gradient(closest-side, rgba(107,140,255,.16), transparent 70%), radial-gradient(closest-side at 70% 40%, rgba(106,75,220,.08), transparent 70%); pointer-events: none; z-index: -1; }
.hero::after { content: ""; position: absolute; inset: 0; background-image: linear-gradient(var(--line-2) 1px, transparent 1px), linear-gradient(90deg, var(--line-2) 1px, transparent 1px); background-size: 56px 56px; mask-image: radial-gradient(ellipse 60% 70% at 50% 20%, #000 20%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse 60% 70% at 50% 20%, #000 20%, transparent 75%); z-index: -2; opacity: .7; }
.badge { display: inline-flex; align-items: center; gap: 10px; padding: 6px 14px 6px 10px; border-radius: 999px; background: var(--paper); border: 1px solid var(--line); font-size: 13px; font-weight: 500; color: var(--sub); text-decoration: none; box-shadow: 0 1px 2px rgba(17,19,24,.04); }
.badge:hover { border-color: #d3d2cb; color: var(--ink); }
.live { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 0 3px var(--ok-soft); }
.sep { width: 1px; height: 12px; background: var(--line); }
.hero h1 { margin-top: 28px; font-size: clamp(36px, 5.4vw, 66px); line-height: 1.18; font-weight: 700; letter-spacing: -.02em; }
.grad { background: linear-gradient(100deg, var(--ink) 10%, var(--accent) 60%, var(--hold) 95%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.lede { max-width: 660px; margin: 24px auto 0; font-size: 18px; color: var(--sub); }
.hero-actions { margin-top: 36px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ---------- 产品窗口 ---------- */
.product { padding-top: 0; padding-bottom: 40px; position: relative; }
.window { position: relative; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; box-shadow: var(--shadow-lg), 0 0 0 6px rgba(255,255,255,.6); overflow: hidden; }
.chrome { display: flex; align-items: center; gap: 18px; padding: 10px 16px; border-bottom: 1px solid var(--line); background: #fcfcfa; }
.dots { display: flex; gap: 6px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: #e4e3dd; }
.tabs { display: flex; gap: 2px; background: var(--mute-soft); padding: 3px; border-radius: 10px; }
.tab { border: 0; background: none; padding: 6px 14px; border-radius: 7px; font-size: 13px; color: var(--sub); }
.tab:hover { color: var(--ink); }
.tab[aria-selected="true"] { background: var(--paper); color: var(--ink); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.chrome-note { margin-left: auto; display: inline-flex; align-items: center; gap: 8px; font-size: 12px; color: var(--warn); background: var(--warn-soft); padding: 3px 10px; border-radius: 999px; }
.demo-dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.app { display: flex; height: 470px; }
.app[hidden] { display: none; }
.side { width: 210px; flex-shrink: 0; border-right: 1px solid var(--line); background: #fcfcfa; padding: 20px 12px; }
.side-kicker { font-size: 12px; color: var(--faint); margin: 0 10px 8px; }
.side-kicker.gap { margin-top: 26px; }
.side-hint { margin: 0 10px; font-size: 12px; line-height: 1.6; color: var(--faint); }
.side ul { list-style: none; margin: 0; padding: 0; }
.side li button { width: 100%; display: flex; justify-content: space-between; align-items: center; text-align: left; background: none; border: 0; padding: 8px 10px; border-radius: 8px; font-size: 13px; color: var(--sub); }
.side li button:hover { background: var(--mute-soft); color: var(--ink); }
.side li button.is-on { background: var(--mute-soft); color: var(--ink); font-weight: 600; }
.side em { font-style: normal; color: var(--faint); font-size: 12px; font-weight: 400; }
.sheet { flex: 1; min-width: 0; padding: 14px 22px 22px; overflow: auto; }
.table-wrap { overflow-x: auto; }
.grid { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.grid th { text-align: left; font-weight: 500; color: var(--faint); font-size: 12px; padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
.grid td { padding: 12px; border-bottom: 1px solid var(--line-2); vertical-align: middle; white-space: nowrap; }
.grid tbody tr { cursor: pointer; transition: background .12s; }
.grid tbody tr:hover { background: #fafaf7; }
.grid tbody tr[aria-selected="true"] { background: #f5f7ff; box-shadow: inset 2px 0 0 var(--accent); }
.mono { font-family: var(--mono); font-weight: 600; font-size: 12.5px; }
.dim { color: var(--sub); }
.av { display: inline-flex; width: 22px; height: 22px; border-radius: 50%; align-items: center; justify-content: center; font-size: 11px; font-weight: 600; margin-right: 8px; vertical-align: middle; color: #fff; }
.pill { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; font-style: normal; white-space: nowrap; }
.pill.ok { color: var(--ok); background: var(--ok-soft); }
.pill.warn { color: var(--warn); background: var(--warn-soft); }
.pill.hold { color: var(--hold); background: var(--hold-soft); }
.pill.accent { color: var(--accent); background: var(--accent-soft); }

.detail { margin-top: 16px; border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; display: grid; grid-template-columns: 1fr 280px; gap: 28px; background: #fdfdfc; }
.detail h4 { margin: 0 0 6px; font-size: 14px; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.detail p { margin: 0; color: var(--sub); font-size: 13.5px; }
.detail .next { margin-top: 10px; }
.detail .next b { color: var(--ink); }
.datechain { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.datechain span { font-size: 12px; padding: 2px 8px; border-radius: 6px; background: var(--mute-soft); color: var(--sub); }
.datechain span b { font-family: var(--mono); font-weight: 600; color: var(--ink); margin-left: 4px; }
.datechain .ok { background: var(--ok-soft); color: var(--ok); }
.track { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 6px 14px; font-size: 12.5px; align-content: start; }
.track li { display: flex; align-items: center; gap: 8px; color: var(--sub); }
.track li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--ok); flex-shrink: 0; }
.track li.now { color: var(--accent); font-weight: 600; }
.track li.now::before { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.track li.todo { color: var(--faint); }
.track li.todo::before { background: none; border: 1.5px solid #cfcec8; }

.board { flex: 1; display: grid; grid-template-columns: repeat(4, minmax(200px, 1fr)); gap: 14px; padding: 20px; overflow-x: auto; background: #fcfcfa; }
.col h4 { margin: 0 0 12px; font-size: 13px; color: var(--sub); font-weight: 600; display: flex; justify-content: space-between; }
.col h4 span { font-weight: 400; color: var(--faint); }
.card { background: var(--paper); border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-bottom: 12px; cursor: pointer; box-shadow: 0 1px 2px rgba(17,19,24,.04); transition: border-color .15s, transform .15s; }
.card:hover { border-color: #cfcec7; transform: translateY(-1px); }
.card small { font-family: var(--mono); font-size: 11.5px; color: var(--faint); }
.card h5 { margin: 4px 0 6px; font-size: 14px; }
.card p { margin: 0 0 12px; font-size: 12.5px; color: var(--sub); line-height: 1.55; }
.card footer { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 12px; color: var(--sub); }
.card.empty { border-style: dashed; color: var(--faint); font-size: 12.5px; text-align: center; cursor: default; background: transparent; box-shadow: none; }
.card.empty:hover { transform: none; }

.report-sheet { display: grid; grid-template-columns: minmax(260px, 1fr) minmax(240px, 1fr); gap: 24px; padding-top: 20px; }
.paper { position: relative; border: 1px solid var(--line); border-radius: 6px; padding: 26px 28px; box-shadow: 0 16px 30px -24px rgba(0,0,0,.3); align-self: start; }
.paper .qr { position: absolute; top: 14px; right: 14px; width: 42px; height: 42px; border-radius: 3px; background: repeating-linear-gradient(0deg, var(--ink) 0 3px, transparent 3px 6px), repeating-linear-gradient(90deg, var(--ink) 0 3px, transparent 3px 6px); opacity: .75; }
.paper .kicker { font-size: 12px; color: var(--faint); }
.paper h4 { font-size: 22px; margin: 6px 0 2px; letter-spacing: .3em; }
.paper dl { margin: 14px 0 0; font-size: 13px; }
.paper dl div { display: flex; gap: 14px; padding: 6px 0; border-bottom: 1px dashed var(--line); }
.paper dt { color: var(--faint); width: 64px; flex-shrink: 0; }
.paper dd { margin: 0; }
.paper .note { margin: 12px 0 0; font-size: 12px; color: var(--faint); }
.steps { list-style: none; margin: 0; padding: 0; }
.steps li { display: flex; gap: 12px; align-items: flex-start; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; margin-bottom: 8px; }
.steps .ic { width: 24px; height: 24px; border-radius: 50%; flex-shrink: 0; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 700; background: var(--mute-soft); color: var(--faint); }
.steps li.done .ic { background: var(--ok-soft); color: var(--ok); }
.steps li.now { border-color: rgba(106,75,220,.35); background: #faf8ff; }
.steps li.now .ic { background: var(--hold-soft); color: var(--hold); }
.steps b { display: block; font-size: 13px; }
.steps span { font-size: 12.5px; color: var(--sub); }
.product-note { margin-top: 18px; text-align: center; font-size: 13px; color: var(--faint); }

/* ---------- 数字条 ---------- */
.strip { padding: 40px 24px 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.strip > div { padding: 8px 28px; border-left: 1px solid var(--line); }
.strip > div:first-child { border-left: 0; padding-left: 0; }
.strip b { display: block; font-size: 34px; font-weight: 700; letter-spacing: -.02em; line-height: 1.2; }
.strip span { font-size: 14px; color: var(--sub); }

/* ---------- 核心能力 bento ---------- */
.bento { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.cell { background: var(--paper); border: 1px solid var(--line); border-radius: 20px; padding: 30px; box-shadow: 0 1px 2px rgba(17,19,24,.03); display: flex; flex-direction: column; }
.cell.wide { grid-column: span 2; }
.cell h3 { font-size: 19px; font-weight: 700; line-height: 1.4; }
.cell p { margin: 10px 0 0; color: var(--sub); font-size: 14.5px; }
.cell > :last-child:not(p):not(h3) { margin-top: auto; padding-top: 22px; }
.chain { list-style: none; margin: 0; padding: 26px 0 0 !important; display: grid; grid-template-columns: repeat(6, 1fr); gap: 8px; }
.chain li { position: relative; font-size: 12.5px; text-align: center; padding: 9px 4px; border-radius: 10px; background: var(--mute-soft); color: var(--faint); }
.chain li.done { background: var(--ok-soft); color: var(--ok); font-weight: 600; }
.chain li.now { background: var(--accent); color: #fff; font-weight: 600; box-shadow: 0 6px 16px -6px rgba(47,91,234,.6); }
.viz-return { display: grid; gap: 8px; font-size: 13px; }
.viz-return .node { justify-self: start; padding: 6px 12px; border-radius: 8px; background: var(--mute-soft); font-weight: 600; }
.viz-return .node.on { background: var(--accent-soft); color: var(--accent); }
.viz-return .loop { padding-left: 14px; border-left: 2px dashed #d3d2cb; color: var(--sub); margin-left: 12px; font-size: 12.5px; }
.kept, .chips { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 6px; }
.kept i, .chips i { font-style: normal; font-size: 12px; padding: 3px 9px; border-radius: 999px; border: 1px solid var(--line); color: var(--sub); background: #fcfcfa; }
.viz-dates { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; font-size: 13px; }
.viz-dates li { display: flex; align-items: center; gap: 10px; padding: 7px 12px; border-radius: 9px; background: #fcfcfa; border: 1px solid var(--line-2); }
.viz-dates span { color: var(--sub); width: 34px; }
.viz-dates b { font-family: var(--mono); font-weight: 600; font-size: 12.5px; }
.viz-dates li.bad { border-color: rgba(194,65,45,.3); background: var(--bad-soft); }
.viz-dates li.bad b { color: var(--bad); }
.viz-dates em { margin-left: auto; font-style: normal; font-size: 12px; color: var(--bad); font-weight: 600; }
.viz-layers { list-style: none; margin: 0; padding: 0; display: grid; gap: 6px; counter-reset: l; }
.viz-layers li { counter-increment: l; display: flex; gap: 10px; align-items: center; font-size: 13px; color: var(--sub); padding: 7px 12px; border-radius: 9px; background: #fcfcfa; border: 1px solid var(--line-2); }
.viz-layers li::before { content: counter(l); width: 20px; height: 20px; border-radius: 6px; background: var(--ink); color: #fff; font-size: 11px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.viz-layers b { color: var(--ink); min-width: 70px; }
.cell.sign { flex-direction: row; gap: 32px; align-items: center; }
.cell.sign .cell-text { flex: 1; }
.cell.sign .chips { margin-top: 18px; }
.viz-paper { position: relative; width: 230px; flex-shrink: 0; aspect-ratio: 210/297; padding: 22px 20px !important; margin: 0 !important; border: 1px solid var(--line); border-radius: 6px; background: #fff; box-shadow: 0 24px 40px -24px rgba(17,19,24,.35); display: flex; flex-direction: column; gap: 6px; transform: rotate(-1.5deg); }
.viz-paper small { font-size: 10px; color: var(--faint); }
.viz-paper b { font-size: 16px; letter-spacing: .3em; }
.pp-no { font-family: var(--mono); font-size: 10px; color: var(--sub); margin-bottom: 8px; }
.pp-line { height: 6px; border-radius: 3px; background: var(--mute-soft); }
.pp-line.s { width: 60%; }
.pp-qr { position: absolute; top: 14px; right: 14px; width: 34px; height: 34px; background: repeating-linear-gradient(0deg, var(--ink) 0 3px, transparent 3px 5px), repeating-linear-gradient(90deg, var(--ink) 0 3px, transparent 3px 5px); opacity: .7; border-radius: 2px; }
.pp-sign { margin-top: auto; display: flex; gap: 10px; font-size: 10px; color: var(--sub); }
.pp-sign span { flex: 1; border-top: 1px solid var(--ink); padding-top: 4px; font-family: "KaiTi", "STKaiti", serif; }
.pp-stamp { position: absolute; right: 18px; bottom: 34px; width: 74px; height: 74px; border-radius: 50%; border: 2.5px solid rgba(194,65,45,.75); color: rgba(194,65,45,.85); font-size: 10px; font-weight: 700; display: flex; align-items: center; justify-content: center; text-align: center; line-height: 1.3; transform: rotate(-14deg); }
.viz-integr { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.viz-integr span { padding: 7px 14px; border-radius: 9px; background: var(--ink); color: #fff; font-size: 13px; font-weight: 600; }
.viz-integr span:nth-of-type(2) { background: var(--accent-soft); color: var(--accent); }
.viz-integr i { flex: 1; min-width: 30px; height: 2px; background: repeating-linear-gradient(90deg, var(--accent) 0 6px, transparent 6px 10px); }
.viz-integr em { width: 100%; font-style: normal; font-size: 12px; color: var(--ok); font-family: var(--mono); }

/* ---------- 服务 ---------- */
.services { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.svc { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); }
.svc > li { padding: 28px 26px 8px 0; position: relative; }
.svc > li + li { padding-left: 26px; border-left: 1px solid var(--line); }
.step { font-family: var(--mono); font-size: 13px; color: var(--accent); font-weight: 600; }
.svc h3 { font-size: 19px; margin: 10px 0 10px; }
.svc p { margin: 0; color: var(--sub); font-size: 14.5px; }
.svc ul { list-style: none; padding: 0; margin: 18px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
.svc ul li { font-size: 12px; padding: 3px 9px; border-radius: 999px; background: var(--mute-soft); color: var(--sub); }
.fine { margin-top: 36px; font-size: 13px; color: var(--faint); }

/* ---------- 后续模块（深色） ---------- */
.roadmap { background: #0f1115; color: #e9eaee; position: relative; overflow: hidden; }
.roadmap::before { content: ""; position: absolute; left: 50%; top: -260px; width: 900px; height: 520px; transform: translateX(-50%); background: radial-gradient(closest-side, rgba(107,140,255,.22), transparent); pointer-events: none; max-width: none; }
.roadmap .head h2 { color: #fff; }
.roadmap .head p:not(.eyebrow) { color: #a0a5b1; }
.plan { display: inline-flex; padding: 4px 12px; border-radius: 999px; border: 1px dashed rgba(255,255,255,.3); color: #c9cdd6; font-size: 13px; }
.mod-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; position: relative; }
.mod { border: 1px solid rgba(255,255,255,.09); border-radius: 20px; padding: 32px; background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)); }
.mod header { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; }
.mod h3 { font-size: 20px; color: #fff; }
.tag { flex-shrink: 0; font-size: 12px; font-weight: 600; color: #c9cdd6; border: 1px dashed rgba(255,255,255,.3); padding: 2px 10px; border-radius: 999px; }
.mod > p { color: #a0a5b1; margin: 12px 0 22px; font-size: 14.5px; }
.compare { display: grid; grid-template-columns: 1fr 34px 1fr; align-items: stretch; }
.compare > div { border-radius: 12px; padding: 14px 16px; background: rgba(255,255,255,.04); }
.compare .raw { border: 1px dashed rgba(255,255,255,.18); }
.compare .norm { border: 1px solid rgba(107,140,255,.55); background: rgba(107,140,255,.08); }
.compare small { display: block; font-size: 12px; color: #868c99; }
.compare code { display: block; font-family: var(--mono); font-size: 16px; margin-top: 6px; color: #fff; }
.compare em { display: block; font-style: normal; font-size: 12px; color: #9fb3ff; margin-top: 6px; }
.arrow { align-self: center; text-align: center; color: var(--accent-2); font-size: 20px; }
.ticks { list-style: none; padding: 0; margin: 22px 0 0; font-size: 14px; color: var(--sub); }
.ticks li { position: relative; padding-left: 22px; margin-top: 8px; }
.ticks li::before { content: ""; position: absolute; left: 2px; top: 6px; width: 11px; height: 6px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.mod .ticks { color: #a0a5b1; }
.mod .ticks li::before { border-color: var(--accent-2); }
.clues { list-style: none; padding: 0; margin: 0; }
.clues li { display: grid; grid-template-columns: 72px 1fr auto; gap: 12px; align-items: center; padding: 12px 14px; background: rgba(255,255,255,.04); border: 1px solid rgba(255,255,255,.08); border-radius: 12px; margin-bottom: 8px; font-size: 13.5px; }
.clues b { color: #fff; }
.clues span { color: #a0a5b1; }

/* ---------- 三种方式 ---------- */
.paths { padding-bottom: 60px; }
.path-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.path { background: var(--paper); border: 1px solid var(--line); border-radius: 20px; padding: 30px; display: flex; flex-direction: column; text-decoration: none; transition: border-color .15s, box-shadow .15s, transform .15s; }
.path:hover { border-color: #d3d2cb; box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.ico { width: 40px; height: 40px; border-radius: 12px; position: relative; }
.i1 { background: var(--accent-soft); }
.i1::after { content: ""; position: absolute; inset: 11px; border: 2px solid var(--accent); border-radius: 4px; }
.i2 { background: var(--ok-soft); }
.i2::after { content: ""; position: absolute; left: 11px; right: 11px; top: 12px; height: 16px; border-top: 2px solid var(--ok); border-bottom: 2px solid var(--ok); box-shadow: inset 0 6px 0 -4px var(--ok); }
.i3 { background: var(--hold-soft); }
.i3::after { content: ""; position: absolute; inset: 11px; border: 2px solid var(--hold); border-radius: 50%; }
.path h3 { font-size: 20px; margin: 20px 0 8px; }
.path p { margin: 0 0 22px; color: var(--sub); font-size: 14.5px; flex: 1; }
.link { font-weight: 600; font-size: 14px; color: var(--accent); }

/* ---------- FAQ ---------- */
.faq { display: grid; grid-template-columns: 360px 1fr; gap: 64px; align-items: start; }
.faq > * { margin: 0; max-width: none; }
.faq .head { position: sticky; top: 100px; margin: 0; }
.faq-list { border-top: 1px solid var(--line); }
details { border-bottom: 1px solid var(--line); }
summary { cursor: pointer; list-style: none; padding: 20px 0; font-size: 16px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; gap: 20px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: ""; width: 9px; height: 9px; border-right: 2px solid var(--faint); border-bottom: 2px solid var(--faint); transform: rotate(45deg) translateY(-3px); transition: transform .2s; flex-shrink: 0; }
details[open] summary::after { transform: rotate(-135deg) translateY(-3px); }
details p { margin: 0 0 20px; color: var(--sub); font-size: 15px; }

/* ---------- 联系 ---------- */
.contact { padding-top: 40px; }
.contact-card { display: grid; grid-template-columns: 1fr 1.1fr; gap: 56px; padding: 56px; border-radius: 28px; background: linear-gradient(135deg, #f1f4ff, #f7f2ff 60%, #fdf8f1); border: 1px solid var(--line); }
.contact h2 { font-size: clamp(28px, 3vw, 38px); line-height: 1.3; font-weight: 700; }
.contact-copy > p:not(.eyebrow) { color: var(--sub); margin-top: 16px; }
.form { background: var(--paper); border: 1px solid var(--line); border-radius: 18px; padding: 26px; display: grid; gap: 14px; box-shadow: var(--shadow-lg); }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.form label { display: grid; gap: 6px; font-size: 13px; font-weight: 600; color: var(--sub); }
.form input, .form select, .form textarea { font: inherit; font-size: 15px; font-weight: 400; color: var(--ink); padding: 10px 12px; border-radius: 10px; border: 1px solid var(--line); background: #fcfcfa; transition: border-color .15s, box-shadow .15s; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.form input[aria-invalid="true"] { border-color: var(--bad); }
.form-msg { margin: 0; font-size: 13px; color: var(--sub); min-height: 1em; }
.form-out { margin: 0; white-space: pre-wrap; font: 13px/1.6 var(--mono); background: #fcfcfa; border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.form-actions { display: flex; gap: 10px; }
.form-actions[hidden], .form-out[hidden] { display: none; }

.foot { border-top: 1px solid var(--line); padding: 28px 24px; }
.foot-inner { max-width: var(--max); margin: 0 auto; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 13px; color: var(--faint); }
.brand.small { font-size: 14px; color: var(--ink); }
.brand.small .mark { width: 16px; height: 16px; border-radius: 5px; }
.brand.small .mark::after { inset: 4px; border-radius: 2px; }

/* ---------- 视频弹窗 ---------- */
.video-dialog { width: min(1100px, 94vw); padding: 0; border: 0; border-radius: 18px; background: #0f1115; color: #e9eaee; box-shadow: 0 40px 120px rgba(0,0,0,.5); }
.video-dialog::backdrop { background: rgba(10,12,16,.6); backdrop-filter: blur(6px); }
.vd-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 18px; }
.vd-head h2 { font-size: 16px; font-weight: 600; }
.vd-close { width: 34px; height: 34px; border-radius: 50%; border: 0; background: rgba(255,255,255,.08); color: #fff; font-size: 20px; line-height: 1; }
.vd-close:hover { background: rgba(255,255,255,.16); }
.video-dialog video { display: block; width: 100%; aspect-ratio: 16/9; background: #000; }
.vd-note { margin: 0; padding: 12px 18px 16px; font-size: 12.5px; color: #a0a5b1; }

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .bento { grid-template-columns: 1fr 1fr; }
  .cell.wide { grid-column: span 2; }
  .svc { grid-template-columns: 1fr 1fr; }
  .svc > li:nth-child(3) { border-left: 0; padding-left: 0; }
  .svc > li:nth-child(n+3) { border-top: 1px solid var(--line); }
  .report-sheet { grid-template-columns: 1fr; }
  .detail { grid-template-columns: 1fr; }
  .faq { grid-template-columns: 1fr; gap: 0; }
  .faq .head { position: static; margin-bottom: 36px; }
}
@media (max-width: 860px) {
  section { padding: 80px 20px; }
  .nav-inner { padding: 0 20px; }
  .menu { display: flex; }
  .nav-cta .btn.ghost { display: none; }
  .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; gap: 0; background: var(--paper); border-bottom: 1px solid var(--line); padding: 4px 20px; box-shadow: 0 20px 30px -20px rgba(0,0,0,.2); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--line-2); font-size: 15px; }
  .nav-links a:last-child { border: 0; }
  .hero { padding-top: 64px; }

  .lede { font-size: 16px; }
  .hero-actions .btn.lg { flex: 1 1 140px; }
  .hero-actions .btn.text { flex-basis: 100%; }
  .side { display: none; }
  .app { height: auto; min-height: 420px; }
  .chrome { gap: 10px; padding: 10px 12px; overflow-x: auto; }
  .chrome-note, .dots { display: none; }
  .board { grid-template-columns: repeat(4, 230px); }
  .strip { grid-template-columns: 1fr 1fr; row-gap: 28px; }
  .strip > div:nth-child(3) { border-left: 0; padding-left: 0; }
  .bento, .mod-grid, .path-grid, .svc { grid-template-columns: 1fr; }
  .cell.wide { grid-column: auto; }
  .chain { grid-template-columns: repeat(3, 1fr); }
  .cell.sign { flex-direction: column; align-items: stretch; }
  .viz-paper { align-self: center; }
  .svc > li, .svc > li + li { padding: 24px 0 8px; border-left: 0; border-top: 1px solid var(--line); }
  .svc > li:first-child { border-top: 0; }
  .compare { grid-template-columns: 1fr; gap: 8px; }
  .arrow { transform: rotate(90deg); }
  .clues li { grid-template-columns: 1fr auto; }
  .clues li span { grid-column: 1 / -1; grid-row: 2; }
  .contact-card { grid-template-columns: 1fr; padding: 28px 20px; gap: 28px; border-radius: 22px; }
  .row2 { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
.cell.full { grid-column: 1 / -1; }
.cell.sign { padding: 36px 48px; }
.cell.sign .viz-paper { margin-right: 40px !important; }
.datechain .ok:not(:last-child) { background: none; color: var(--faint); padding: 2px 0; }
@media (max-width: 1080px) { .cell.full { grid-column: 1 / -1; } }
@media (max-width: 860px) { .cell.full { grid-column: auto; } .cell.sign { padding: 28px; } .cell.sign .viz-paper { margin-right: 0 !important; } }
.head > * { max-width: 860px; }
.head h2, .hero h1, .contact h2 { text-wrap: balance; }
.head p:not(.eyebrow) { max-width: 680px; }
@media (max-width: 860px) {
  .hero h1 { font-size: 34px; }
  .grid th:nth-child(3), .grid td:nth-child(3), .grid th:nth-child(4), .grid td:nth-child(4) { display: none; }
}

/* ================= v4：开箱即用版布局 ================= */
/* 首屏视频 */
.hero { padding-bottom: 40px; }
.hero-video { max-width: 1120px; margin: 56px auto 0; }
.hv-frame { position: relative; border-radius: 18px; overflow: hidden; background: #fff; border: 1px solid var(--line); box-shadow: var(--shadow-lg), 0 0 0 6px rgba(255,255,255,.6); }
.hv-frame video { display: block; width: 100%; aspect-ratio: 16/9; background: #f7f7f4; }
.hv-toggle { position: absolute; right: 14px; bottom: 14px; width: 38px; height: 38px; border-radius: 50%; border: 1px solid rgba(255,255,255,.4); background: rgba(17,19,24,.55); backdrop-filter: blur(6px); display: flex; align-items: center; justify-content: center; opacity: .75; transition: opacity .15s; }
.hv-toggle:hover, .hv-toggle:focus-visible { opacity: 1; }
.hv-toggle .ic { width: 12px; height: 12px; border-left: 4px solid #fff; border-right: 4px solid #fff; }
.hv-toggle.is-paused .ic { width: 0; height: 0; border-right: 0; border-left: 11px solid #fff; border-top: 7px solid transparent; border-bottom: 7px solid transparent; margin-left: 3px; }
.hv-note { margin: 14px 0 0; font-size: 13px; color: var(--faint); }

/* 基本流程 */
.flow { padding-bottom: 56px; }
.stages { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; counter-reset: none; }
.stages li { position: relative; background: var(--paper); border: 1px solid var(--line); border-radius: 16px; padding: 22px 20px 20px; display: flex; flex-direction: column; gap: 6px; }
.stages li:not(:last-child)::after { content: ""; position: absolute; right: -11px; top: 34px; width: 10px; height: 10px; border-top: 2px solid #c9c8c1; border-right: 2px solid #c9c8c1; transform: rotate(45deg); background: var(--bg); z-index: 1; }
.stages .no { font-family: var(--mono); font-size: 12px; color: var(--accent); font-weight: 600; }
.stages b { font-size: 18px; margin-bottom: 6px; }
.stages em { font-style: normal; font-size: 13px; color: var(--sub); padding: 4px 10px; border-radius: 8px; background: var(--mute-soft); align-self: flex-start; }
.product { padding-bottom: 100px; }

/* 关键质控 */
.qc { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.qc-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.qc .cell { background: var(--bg); box-shadow: none; padding: 26px; }
.qc .cell h3 { font-size: 17px; }
.qc .cell p { font-size: 14px; }

/* 两个重点功能：各占一屏 */
.feature { display: grid; grid-template-columns: 1fr 1.05fr; gap: 72px; align-items: center; max-width: none; }
.feature > * { margin: 0; max-width: none; }
.feature { padding-left: max(24px, calc((100% - var(--max)) / 2)); padding-right: max(24px, calc((100% - var(--max)) / 2)); }
.feat-text h2 { font-size: clamp(30px, 3.2vw, 42px); line-height: 1.25; font-weight: 700; letter-spacing: -.01em; text-wrap: balance; }
.feat-text > p:not(.eyebrow) { color: var(--sub); font-size: 17px; margin: 18px 0 0; }
.feat-text .ticks { font-size: 15px; margin-top: 28px; }
.feat-text .ticks li { margin-top: 12px; }
.feat-text .ticks b { color: var(--ink); }
.panel { background: var(--paper); border: 1px solid var(--line); border-radius: 20px; padding: 26px; box-shadow: var(--shadow-lg); }
.pv-head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding-bottom: 16px; margin-bottom: 18px; border-bottom: 1px solid var(--line-2); font-size: 13px; }
.pv-head b { font-size: 15px; }
.pv-head span { color: var(--faint); }
#qual .compare > div { background: #fcfcfa; }
#qual .compare .raw { border-color: #d6d5ce; }
#qual .compare .norm { border-color: rgba(47,91,234,.4); background: #f6f8ff; }
#qual .compare small { color: var(--faint); }
#qual .compare code { color: var(--ink); }
#qual .compare em { color: var(--accent); }
.stat { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 8px; }
.stat li { display: grid; grid-template-columns: 90px 1fr auto; gap: 12px; align-items: center; padding: 11px 14px; border: 1px solid var(--line-2); border-radius: 12px; font-size: 14px; }
.stat span { color: var(--sub); }
.stat b { font-family: var(--mono); font-size: 13px; font-weight: 600; }

.feature.dark { background: #0f1115; color: #e9eaee; position: relative; overflow: hidden; }
.feature.dark::before { content: ""; position: absolute; left: 30%; top: -240px; width: 900px; height: 520px; transform: translateX(-50%); background: radial-gradient(closest-side, rgba(107,140,255,.2), transparent); pointer-events: none; }
.feature.dark > * { position: relative; }
.feature.dark h2 { color: #fff; }
.feature.dark .feat-text > p:not(.eyebrow), .feature.dark .ticks { color: #a0a5b1; }
.feature.dark .ticks b { color: #fff; }
.feature.dark .eyebrow { color: var(--accent-2); }
.feature.dark .ticks li::before { border-color: var(--accent-2); }
.feature.dark .panel { background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.02)); border-color: rgba(255,255,255,.1); box-shadow: 0 40px 80px -40px rgba(0,0,0,.6); }
.feature.dark .pv-head { border-color: rgba(255,255,255,.08); }
.feature.dark .pv-head b { color: #fff; }
.loop-steps { list-style: none; padding: 0; margin: 18px 0 0; display: flex; flex-wrap: wrap; gap: 6px; counter-reset: s; }
.loop-steps li { counter-increment: s; font-size: 12.5px; padding: 5px 10px 5px 6px; border-radius: 999px; border: 1px solid rgba(255,255,255,.1); color: #7d828e; display: inline-flex; align-items: center; gap: 6px; }
.loop-steps li::before { content: counter(s); width: 18px; height: 18px; border-radius: 50%; background: rgba(255,255,255,.08); font-size: 10.5px; display: inline-flex; align-items: center; justify-content: center; }
.loop-steps li.d { color: #cfe9dc; }
.loop-steps li.d::before { background: var(--ok); color: #fff; }
.loop-steps li.n { color: #fff; border-color: var(--accent-2); }
.loop-steps li.n::before { background: var(--accent); color: #fff; }

@media (max-width: 1080px) {
  .qc-grid { grid-template-columns: 1fr 1fr; }
  .stages { grid-template-columns: repeat(3, 1fr); }
  .stages li::after { display: none; }
  .feature { grid-template-columns: 1fr; gap: 40px; }
  .feature.dark .feat-text { order: -1; }
}
@media (max-width: 860px) {
  .hero-video { margin-top: 40px; }
  .hv-frame { border-radius: 12px; }
  .stages, .qc-grid { grid-template-columns: 1fr; }
  .feature { padding: 80px 20px; }
  .stat li { grid-template-columns: 1fr auto; }
  .stat li b { grid-column: 1; grid-row: 2; }
}
.head.center p:not(.eyebrow) { margin-left: auto; margin-right: auto; }
.faq { padding-left: max(24px, calc((100% - var(--max)) / 2)); padding-right: max(24px, calc((100% - var(--max)) / 2)); }
@media (max-width: 860px) {
  .stages { gap: 8px; }
  .stages li { flex-direction: row; flex-wrap: wrap; align-items: center; padding: 14px 16px; gap: 6px 8px; }
  .stages b { margin: 0 6px 0 0; font-size: 16px; }
}