@charset "UTF-8";
/*
 * Landing page · 事故调查管理台
 * Standalone marketing shell; host app styles remain in styles.css
 */

:root {
  --ink: #0c1220;
  --ink-2: #1a2438;
  --paper: #f4f6fb;
  --paper-2: #ffffff;
  --muted: #6b7686;
  --faint: #94a0b4;
  --line: rgba(255, 255, 255, .12);
  --line-dark: #dee3ec;
  --accent: #4f6ef7;
  --accent-2: #7d9cf0;
  --seal: #8b7cf0;
  --seal-soft: rgba(139, 124, 240, .16);
  --danger: #e85a4f;
  --ok: #2fbe7a;
  --warn: #e0a33a;
  --glass: rgba(12, 18, 32, .55);
  --glass-2: rgba(255, 255, 255, .06);
  --shadow: 0 24px 64px rgba(4, 8, 18, .45);
  --radius: 16px;
  --radius-sm: 10px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  color: #e8eef8;
  background: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 4px; }

.u-sr {
  position: absolute; width: 1px; height: 1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.u-num { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.u-muted { color: var(--faint); }

/* ---------- shell ---------- */
.lp-skip {
  position: fixed; top: -60px; left: 16px; z-index: 100;
  padding: 10px 14px; border-radius: 8px; background: #fff; color: var(--ink);
  font-weight: 600; font-size: 13px; transition: top .15s;
}
.lp-skip:focus { top: 14px; }

.lp-nav {
  position: fixed; inset: 0 0 auto 0; z-index: 50;
  display: flex; align-items: center; gap: 18px;
  padding: 14px 28px;
  background: linear-gradient(180deg, rgba(8, 12, 22, .92), rgba(8, 12, 22, .55) 70%, transparent);
  backdrop-filter: blur(10px);
}
.lp-brand {
  display: flex; align-items: center; gap: 10px; min-width: 0;
}
.lp-brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(145deg, rgba(79, 110, 247, .35), rgba(139, 124, 240, .28));
  border: 1px solid rgba(168, 188, 245, .35);
  display: grid; place-items: center; flex: 0 0 auto;
}
.lp-brand-mark svg { width: 18px; height: 18px; color: #c5d2ff; }
.lp-brand b { display: block; font-size: 14px; font-weight: 700; letter-spacing: .01em; }
.lp-brand span {
  display: block; font-family: var(--mono); font-size: 10px;
  letter-spacing: .08em; color: var(--faint);
}
.lp-nav-links {
  display: flex; align-items: center; gap: 4px; margin-left: auto; flex-wrap: wrap;
  list-style: none;
}
.lp-nav-links a {
  padding: 7px 11px; border-radius: 8px; font-size: 13px; color: #c5cfe0;
  transition: background .14s, color .14s;
}
.lp-nav-links a:hover { background: var(--glass-2); color: #fff; }
.lp-nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  margin-left: 8px; padding: 8px 14px !important;
  border-radius: 999px !important;
  background: linear-gradient(135deg, var(--accent), #6d5bd0) !important;
  color: #fff !important; font-weight: 600; font-size: 13px;
  box-shadow: 0 8px 24px rgba(79, 110, 247, .28);
}
.lp-nav-cta:hover { filter: brightness(1.06); }
.lp-nav-toggle {
  display: none; width: 42px; height: 42px; border-radius: 10px;
  border: 1px solid var(--line); color: #d7e0f0;
  align-items: center; justify-content: center;
}
.lp-nav-toggle svg { width: 20px; height: 20px; }

/* ---------- hero ---------- */
.lp-hero {
  position: relative; min-height: 100vh; min-height: 100dvh;
  display: flex; align-items: flex-end;
  padding: 120px 28px 72px;
  overflow: hidden;
}
.lp-hero-media {
  position: absolute; inset: 0; z-index: 0;
  background: #060a14;
}
.lp-hero-media picture,
.lp-hero-media img {
  width: 100%; height: 100%;
}
.lp-hero-media img {
  object-fit: cover;
  transform: scale(1.08);
  animation: lp-kenburns 18s ease-in-out infinite alternate;
}
@keyframes lp-kenburns {
  from { transform: scale(1.06) translate3d(0, 0, 0); }
  to { transform: scale(1.14) translate3d(-1.5%, -1%, 0); }
}
.lp-hero-scrim {
  position: absolute; inset: 0; z-index: 1;
  background:
    linear-gradient(100deg, rgba(6, 10, 20, .88) 0%, rgba(6, 10, 20, .62) 40%, rgba(6, 10, 20, .28) 66%, rgba(6, 10, 20, .48) 100%),
    linear-gradient(0deg, rgba(6, 10, 20, .88) 0%, transparent 48%);
}
.lp-hero-inner {
  position: relative; z-index: 2;
  width: min(1120px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  gap: 36px;
  align-items: end;
}
.lp-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 10px; border-radius: 999px;
  border: 1px solid rgba(168, 188, 245, .28);
  background: rgba(79, 110, 247, .14);
  font-family: var(--mono); font-size: 11px; letter-spacing: .08em;
  color: #b8c8f5; margin-bottom: 16px;
}
.lp-kicker i {
  width: 7px; height: 7px; border-radius: 50%; background: var(--ok);
  box-shadow: 0 0 0 4px rgba(47, 190, 122, .18);
}
.lp-hero h1 {
  font-size: clamp(32px, 5vw, 52px);
  line-height: 1.12; letter-spacing: -.02em; font-weight: 750;
  max-width: 16ch; margin-bottom: 16px;
}
.lp-hero h1 em {
  font-style: normal;
  background: linear-gradient(120deg, #9eb2ff, #c4b5ff 55%, #f0e9ff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lp-lede {
  font-size: 16px; line-height: 1.75; color: #b7c2d6;
  max-width: 48ch; margin-bottom: 28px;
}
.lp-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 28px; }
.lp-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 44px; padding: 10px 18px; border-radius: 999px;
  font-size: 14px; font-weight: 600;
  border: 1px solid transparent;
  transition: transform .14s, background .14s, border-color .14s, box-shadow .14s;
}
.lp-btn:hover { transform: translateY(-1px); }
.lp-btn-primary {
  background: linear-gradient(135deg, var(--accent), #6d5bd0);
  color: #fff; box-shadow: 0 12px 32px rgba(79, 110, 247, .32);
}
.lp-btn-primary:hover { box-shadow: 0 16px 40px rgba(79, 110, 247, .4); }
.lp-btn-ghost {
  background: rgba(255, 255, 255, .06);
  border-color: rgba(255, 255, 255, .16); color: #eef2ff;
}
.lp-btn-ghost:hover { background: rgba(255, 255, 255, .1); border-color: rgba(255, 255, 255, .28); }
.lp-btn svg { width: 16px; height: 16px; }

.lp-meta-row {
  display: flex; flex-wrap: wrap; gap: 18px 28px;
  padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .1);
}
.lp-meta-row div { min-width: 0; }
.lp-meta-row dt {
  font-size: 11px; letter-spacing: .08em; color: var(--faint); margin-bottom: 3px;
}
.lp-meta-row dd { font-family: var(--mono); font-size: 13px; font-weight: 600; color: #e8eef8; }

.lp-incident-card {
  background: rgba(10, 14, 26, .72);
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
  overflow: hidden;
}
.lp-incident-card .ic-hd {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  padding: 14px 16px; border-bottom: 1px solid rgba(255, 255, 255, .08);
  background: rgba(255, 255, 255, .03);
}
.lp-chip {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 700;
}
.lp-chip-danger { background: rgba(232, 90, 79, .16); color: #ff9a92; }
.lp-chip-seal { background: var(--seal-soft); color: #c8bfff; }
.lp-chip-ok { background: rgba(47, 190, 122, .14); color: #7ee0b0; }
.lp-chip-warn { background: rgba(224, 163, 58, .16); color: #f0c879; }
.lp-incident-card .ic-bd { padding: 16px; }
.lp-incident-card .ic-id {
  font-family: var(--mono); font-size: 11px; color: var(--faint); margin-bottom: 6px;
}
.lp-incident-card h2 {
  font-size: 16px; line-height: 1.45; font-weight: 700; margin-bottom: 10px;
}
.lp-incident-card p {
  font-size: 13px; color: #a9b5c9; line-height: 1.65; margin-bottom: 14px;
}
.lp-stat-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 8px;
  margin-bottom: 14px;
}
@media (max-width: 560px) {
  .lp-stat-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
.lp-stat {
  padding: 10px; border-radius: 10px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(255, 255, 255, .06);
}
.lp-stat span { display: block; font-size: 10px; color: var(--faint); margin-bottom: 2px; }
.lp-stat b {
  display: block; font-family: var(--mono); font-size: 15px; font-weight: 700;
}
.lp-hyp-list { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.lp-hyp-list li {
  display: grid; grid-template-columns: 1fr auto; gap: 8px; align-items: center;
  font-size: 12px;
}
.lp-hyp-list .bar {
  grid-column: 1 / -1; height: 4px; border-radius: 999px;
  background: rgba(255, 255, 255, .08); overflow: hidden;
}
.lp-hyp-list .bar i {
  display: block; height: 100%; border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), var(--seal));
}
.lp-incident-card .ic-ft {
  padding: 12px 16px; border-top: 1px solid rgba(255, 255, 255, .08);
  display: flex; gap: 8px; flex-wrap: wrap;
}
.lp-incident-card .ic-ft a {
  flex: 1 1 auto; text-align: center; min-height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px; font-size: 12.5px; font-weight: 600;
}
.lp-incident-card .ic-ft .a-primary {
  background: rgba(79, 110, 247, .22); color: #d4deff;
  border: 1px solid rgba(125, 156, 240, .35);
}
.lp-incident-card .ic-ft .a-ghost {
  background: transparent; color: #c5cfe0;
  border: 1px solid rgba(255, 255, 255, .12);
}

/* ---------- sections ---------- */
.lp-section {
  padding: 72px 28px;
  width: min(1120px, 100%);
  margin: 0 auto;
}
.lp-section-hd {
  display: flex; flex-direction: column; gap: 10px; margin-bottom: 28px;
  max-width: 72ch;
}
.lp-section-hd h2 {
  font-size: clamp(24px, 3vw, 32px); letter-spacing: -.015em; line-height: 1.25;
}
.lp-section-hd p {
  color: var(--faint); font-size: 14px; line-height: 1.65; max-width: 54ch;
}
.lp-eyebrow {
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em;
  color: var(--accent-2); margin-bottom: 2px; font-weight: 600;
}

.lp-band {
  background: linear-gradient(180deg, #0a101c 0%, #0d1424 100%);
  border-top: 1px solid rgba(255, 255, 255, .05);
  border-bottom: 1px solid rgba(255, 255, 255, .05);
}

.lp-kpi-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.lp-kpi {
  padding: 18px 16px; border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
}
.lp-kpi .k-label { font-size: 12px; color: var(--faint); margin-bottom: 6px; }
.lp-kpi .k-val {
  font-family: var(--mono); font-size: 28px; font-weight: 750;
  letter-spacing: -.02em; line-height: 1.1;
}
.lp-kpi .k-val small { font-size: 13px; color: var(--faint); margin-left: 4px; font-weight: 600; }
.lp-kpi .k-why { margin-top: 6px; font-size: 12px; color: #8f9bb0; line-height: 1.5; }

/* modules */
.lp-modules {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.lp-mod {
  display: flex; flex-direction: column; gap: 10px;
  padding: 18px; border-radius: var(--radius);
  background: rgba(255, 255, 255, .045);
  border: 1px solid rgba(255, 255, 255, .1);
  transition: border-color .16s, transform .16s, background .16s;
  min-height: 100%;
}
.lp-mod:hover {
  border-color: rgba(125, 156, 240, .35);
  background: rgba(79, 110, 247, .08);
  transform: translateY(-2px);
}
.lp-mod .mod-icon {
  width: 40px; height: 40px; border-radius: 11px;
  display: grid; place-items: center;
  background: rgba(79, 110, 247, .14);
  border: 1px solid rgba(125, 156, 240, .22);
  color: #b8c8f5;
}
.lp-mod .mod-icon svg { width: 20px; height: 20px; }
.lp-mod h3 { font-size: 16px; font-weight: 700; }
.lp-mod p { font-size: 13px; color: #a0adbf; line-height: 1.65; flex: 1 1 auto; }
.lp-mod .mod-link {
  font-size: 12.5px; font-weight: 600; color: #a8bcf5;
  display: inline-flex; align-items: center; gap: 4px;
}
.lp-mod .mod-link svg { width: 14px; height: 14px; }

/* split story */
.lp-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: center;
}
.lp-split-media {
  position: relative; border-radius: var(--radius); overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .1);
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 10;
  background: #0a0f1a;
}
.lp-split-media picture,
.lp-split-media img {
  width: 100%; height: 100%;
}
.lp-split-media img {
  object-fit: cover;
}
.lp-split-media::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(6, 10, 20, .55));
  pointer-events: none;
}
.lp-split-copy h2 {
  font-size: clamp(24px, 3vw, 32px); letter-spacing: -.015em;
  line-height: 1.25; margin-bottom: 12px;
}
.lp-split-copy p {
  color: #a8b4c7; font-size: 14.5px; line-height: 1.75; margin-bottom: 14px;
}
.lp-check {
  list-style: none; display: flex; flex-direction: column; gap: 10px;
  margin: 18px 0 22px;
}
.lp-check li {
  position: relative; padding-left: 28px;
  font-size: 13.5px; color: #c5cfdf; line-height: 1.55;
}
.lp-check li::before {
  content: ""; position: absolute; left: 0; top: 4px;
  width: 16px; height: 16px; border-radius: 50%;
  background: rgba(47, 190, 122, .16);
  border: 1px solid rgba(47, 190, 122, .4);
  box-shadow: inset 0 0 0 3px transparent;
}
.lp-check li::after {
  content: ""; position: absolute; left: 5px; top: 8px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--ok);
}

/* boundary */
.lp-boundary {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
.lp-bound {
  padding: 20px; border-radius: var(--radius);
  border: 1px solid rgba(255, 255, 255, .08);
  background: rgba(255, 255, 255, .03);
}
.lp-bound.tone-host { border-top: 3px solid var(--accent); }
.lp-bound.tone-ext { border-top: 3px solid var(--seal); }
.lp-bound h3 { font-size: 16px; margin-bottom: 6px; }
.lp-bound .sub { font-size: 12px; color: var(--faint); margin-bottom: 14px; }
.lp-bound ul { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.lp-bound li {
  font-size: 13px; color: #b6c1d2; line-height: 1.55;
  padding-left: 14px; border-left: 2px solid rgba(255, 255, 255, .1);
}
.lp-bound.tone-ext li { border-left-color: rgba(139, 124, 240, .45); }
.lp-bound.tone-host li { border-left-color: rgba(79, 110, 247, .45); }

/* flow */
.lp-flow {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px;
  counter-reset: step;
}
.lp-step {
  position: relative;
  padding: 18px 16px; border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, .03);
  border: 1px solid rgba(255, 255, 255, .08);
}
.lp-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block; font-family: var(--mono); font-size: 12px;
  color: var(--accent-2); letter-spacing: .08em; margin-bottom: 10px; font-weight: 700;
}
.lp-step h3 { font-size: 15px; margin-bottom: 6px; }
.lp-step p { font-size: 12.5px; color: #97a4b8; line-height: 1.6; }

/* roles */
.lp-roles {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 12px;
}
.lp-role {
  padding: 16px; border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, .08);
  background: rgba(255, 255, 255, .025);
}
.lp-role h3 { font-size: 14px; margin-bottom: 6px; }
.lp-role p { font-size: 12.5px; color: #97a4b8; line-height: 1.6; }

/* CTA band */
.lp-cta-band {
  position: relative; overflow: hidden;
  margin: 0 28px 72px;
  border-radius: calc(var(--radius) + 4px);
  border: 1px solid rgba(255, 255, 255, .1);
  background:
    radial-gradient(80% 120% at 10% 0%, rgba(79, 110, 247, .28), transparent 55%),
    radial-gradient(70% 100% at 100% 100%, rgba(139, 124, 240, .22), transparent 50%),
    #0b1220;
  padding: 42px 36px;
  display: grid; grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 24px; align-items: center;
}
.lp-cta-band h2 {
  font-size: clamp(22px, 3vw, 30px); letter-spacing: -.015em; margin-bottom: 8px;
}
.lp-cta-band p { color: #a8b4c7; font-size: 14px; max-width: 52ch; line-height: 1.7; }
.lp-cta-band .lp-actions { margin: 0; }
.lp-note {
  margin-top: 14px; font-size: 12px; color: #7f8ca3; line-height: 1.6; max-width: 64ch;
}

/* footer */
.lp-foot {
  padding: 28px; border-top: 1px solid rgba(255, 255, 255, .06);
  color: #6f7c93; font-size: 12px;
}
.lp-foot-inner {
  width: min(1120px, 100%); margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 12px 24px;
  justify-content: space-between; align-items: center;
}
.lp-foot a { color: #9aabc6; }
.lp-foot a:hover { color: #fff; }

/* mobile */
@media (max-width: 960px) {
  .lp-hero-inner,
  .lp-split,
  .lp-boundary,
  .lp-cta-band { grid-template-columns: minmax(0, 1fr); }
  .lp-kpi-row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lp-modules,
  .lp-roles,
  .lp-flow { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lp-hero { padding: 100px 20px 40px; min-height: auto; align-items: stretch; }
  .lp-hero-inner { gap: 24px; }
  .lp-incident-card { margin-bottom: 8px; }
  .lp-section { padding: 56px 20px; }
  .lp-cta-band { margin: 0 20px 48px; padding: 28px 22px; }
  .lp-nav { padding: 12px 16px; }
  .lp-nav-links {
    display: none; position: absolute; left: 12px; right: 12px; top: 64px;
    flex-direction: column; align-items: stretch;
    padding: 10px; border-radius: 14px;
    background: rgba(10, 14, 24, .96);
    border: 1px solid rgba(255, 255, 255, .1);
    box-shadow: var(--shadow);
  }
  .lp-nav-links.is-open { display: flex; }
  .lp-nav-toggle { display: inline-flex; margin-left: auto; }
  .lp-nav-cta { margin-left: 0; justify-content: center; }
}

@media (max-width: 560px) {
  .lp-modules,
  .lp-roles,
  .lp-flow,
  .lp-kpi-row,
  .lp-stat-grid { grid-template-columns: minmax(0, 1fr); }
  .lp-hero h1 { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  .lp-hero-media img { animation: none; transform: none; }
  html { scroll-behavior: auto; }
  .lp-mod, .lp-btn { transition: none; }
}

@media print {
  .lp-nav, .lp-nav-toggle { display: none !important; }
  .lp-hero { min-height: auto; padding-top: 24px; }
  .lp-hero-media img { animation: none; }
  body { background: #fff; color: #111; }
}