@charset "UTF-8";
/*
 * 产品着陆页专用样式 · 采购评审工作台
 * 与宿主应用 styles.css 分离：无侧栏壳层，营销叙事布局
 */

:root {
  --ui-font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --num-font: "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --faint: #94a3b8;
  --paper: #ffffff;
  --bg: #f4f6fb;
  --bg-2: #eef2f8;
  --line: #e2e8f0;
  --accent: #2f4dc0;
  --accent-dk: #23399a;
  --accent-soft: #e8ecfb;
  --seal: #6d5bd0;
  --seal-soft: #f0edfb;
  --ok: #197a4b;
  --ok-soft: #e8f5ee;
  --warn: #b7791f;
  --danger: #c2352b;
  --rail: #0b1424;
  --shadow-1: 0 1px 2px rgba(15, 23, 42, .06);
  --shadow-2: 0 12px 40px rgba(15, 23, 42, .12);
  --shadow-3: 0 24px 64px rgba(11, 20, 36, .22);
  --radius: 14px;
  --radius-sm: 8px;
  --max: 1120px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  font-family: var(--ui-font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; height: auto; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

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

.skip-link {
  position: fixed; top: -60px; left: 14px; z-index: 90;
  padding: 9px 15px; border: 1px solid var(--accent); border-radius: var(--radius-sm);
  background: var(--paper); color: var(--accent-dk); font-size: 13px; font-weight: 600;
  box-shadow: var(--shadow-2);
}
.skip-link:focus { top: 14px; text-decoration: none; }

/* ===== Top bar ===== */
.lp-nav {
  position: sticky; top: 0; z-index: 40;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, .88);
  border-bottom: 1px solid rgba(226, 232, 240, .9);
}
.lp-nav-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; gap: 16px;
  padding: 12px 22px; min-height: 60px;
}
.lp-brand {
  display: flex; align-items: center; gap: 10px; color: inherit;
}
.lp-brand:hover { text-decoration: none; }
.lp-brand-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(145deg, #1a2744, #0b1424);
  display: grid; place-items: center; color: #a8bcf5;
  border: 1px solid rgba(125, 156, 240, .35);
}
.lp-brand-mark svg { width: 18px; height: 18px; }
.lp-brand b { display: block; font-size: 14px; font-weight: 700; letter-spacing: .01em; }
.lp-brand span {
  display: block; font-size: 11px; color: var(--muted);
  font-family: var(--num-font); letter-spacing: .04em;
}
.lp-nav-links {
  display: flex; align-items: center; gap: 4px; margin-left: auto; flex-wrap: wrap;
}
.lp-nav-links a {
  padding: 7px 11px; border-radius: 7px; font-size: 13px; color: var(--ink-2); font-weight: 500;
}
.lp-nav-links a:hover { background: var(--bg-2); color: var(--ink); text-decoration: none; }
.lp-nav-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  min-height: 40px; padding: 8px 16px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--paper);
  font-size: 13.5px; font-weight: 600; color: var(--ink-2); white-space: nowrap;
  transition: transform .15s, box-shadow .15s, background .15s, border-color .15s;
}
.btn:hover { text-decoration: none; border-color: var(--accent); color: var(--accent); }
.btn:active { transform: translateY(1px); }
.btn svg { width: 15px; height: 15px; flex: 0 0 auto; }
.btn-primary {
  background: linear-gradient(180deg, #3a5ad0, var(--accent));
  border-color: var(--accent-dk); color: #fff;
  box-shadow: 0 6px 18px rgba(47, 77, 192, .28);
}
.btn-primary:hover { background: var(--accent-dk); color: #fff; border-color: var(--accent-dk); }
.btn-seal {
  background: linear-gradient(180deg, #7a68d8, var(--seal));
  border-color: #5b49bd; color: #fff;
  box-shadow: 0 6px 18px rgba(109, 91, 208, .28);
}
.btn-seal:hover { background: #5b49bd; color: #fff; border-color: #5b49bd; }
.btn-ghost {
  background: transparent; border-color: transparent; color: var(--ink-2);
}
.btn-ghost:hover { background: var(--bg-2); color: var(--accent-dk); border-color: transparent; }
.btn-outline {
  background: transparent; border-color: rgba(47, 77, 192, .28); color: var(--accent-dk);
}
.btn-outline:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent-dk); }
.btn-lg { min-height: 48px; padding: 12px 20px; font-size: 14.5px; border-radius: 11px; }
.btn-sm { min-height: 34px; padding: 5px 12px; font-size: 12.5px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(1200px 600px at 80% 10%, rgba(109, 91, 208, .18), transparent 55%),
              radial-gradient(900px 500px at 10% 80%, rgba(47, 77, 192, .16), transparent 50%),
              linear-gradient(165deg, #0b1424 0%, #121f38 48%, #1a2744 100%);
  color: #e8eefc;
}
.hero-grid {
  max-width: var(--max); margin: 0 auto;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: 36px; align-items: center;
  padding: 56px 22px 64px;
  min-height: min(78vh, 760px);
}
.hero-kicker {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 11px; border-radius: 999px;
  background: rgba(109, 91, 208, .18); border: 1px solid rgba(185, 170, 245, .35);
  font-size: 11.5px; font-weight: 600; letter-spacing: .08em; color: #c8bcf8;
  margin-bottom: 16px;
}
.hero-kicker .dot {
  width: 7px; height: 7px; border-radius: 50%; background: #4ade80;
  box-shadow: 0 0 0 4px rgba(74, 222, 128, .18);
}
.hero h1 {
  font-size: clamp(28px, 4.2vw, 42px);
  line-height: 1.18; font-weight: 700; letter-spacing: -.02em;
  color: #fff; max-width: 16ch;
}
.hero-lede {
  margin-top: 14px; font-size: 15.5px; line-height: 1.75;
  color: #b7c3db; max-width: 48ch;
}
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px;
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 18px; margin-top: 28px;
  padding-top: 20px; border-top: 1px solid rgba(255, 255, 255, .08);
}
.hero-meta div { min-width: 120px; }
.hero-meta dt {
  font-size: 11px; letter-spacing: .08em; color: #7d8cab; margin-bottom: 3px;
}
.hero-meta dd {
  font-family: var(--num-font); font-size: 14px; font-weight: 600; color: #e8eefc;
}
.hero-visual {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-3), 0 0 0 1px rgba(168, 188, 245, .12);
  border: 1px solid rgba(168, 188, 245, .28);
  background: #0a1220;
  aspect-ratio: 16 / 10;
}
.hero-visual::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(11, 20, 36, .12), transparent 42%, rgba(109, 91, 208, .12));
  pointer-events: none; z-index: 1;
}
.hero-visual video,
.hero-visual img {
  width: 100%; height: 100%; object-fit: cover;
}
.hero-visual-fallback {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transform: scale(1.04);
  animation: hero-drift 14s ease-in-out infinite alternate;
}
@keyframes hero-drift {
  from { transform: scale(1.04) translate3d(0, 0, 0); }
  to { transform: scale(1.1) translate3d(-1.5%, -1%, 0); }
}
.hero-badge {
  position: absolute; left: 14px; bottom: 14px; z-index: 2;
  display: flex; flex-direction: column; gap: 2px;
  padding: 10px 12px; border-radius: 10px;
  background: rgba(11, 20, 36, .78); backdrop-filter: blur(10px);
  border: 1px solid rgba(168, 188, 245, .28);
  color: #dbe4f8; font-size: 11.5px; max-width: min(300px, 84%);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .28);
}
.hero-badge b {
  font-family: var(--num-font); font-size: 12px; color: #fff; letter-spacing: .04em;
}
.hero-glow {
  position: absolute; inset: auto -20% -30% 30%; height: 50%;
  background: radial-gradient(circle, rgba(109, 91, 208, .35), transparent 65%);
  pointer-events: none; filter: blur(8px); z-index: 0;
}

/* ===== Sections ===== */
.section {
  max-width: var(--max); margin: 0 auto;
  padding: 64px 22px;
}
.section-head {
  display: flex; flex-wrap: wrap; align-items: end; gap: 12px 24px;
  margin-bottom: 28px;
}
.section-head h2 {
  font-size: clamp(22px, 2.6vw, 28px); font-weight: 700; letter-spacing: -.015em;
  line-height: 1.25;
}
.section-head p {
  flex: 1 1 280px; color: var(--muted); font-size: 14.5px; max-width: 56ch;
}
.eyebrow {
  display: block; font-size: 11.5px; font-weight: 700;
  letter-spacing: .12em; color: var(--seal); margin-bottom: 8px;
}

/* ===== Trust strip ===== */
.trust-strip {
  max-width: var(--max); margin: -12px auto 0;
  padding: 0 22px 8px;
}
.trust-inner {
  display: flex; flex-wrap: wrap; gap: 10px 18px; align-items: center;
  padding: 14px 16px; border-radius: 12px;
  background: var(--paper); border: 1px solid var(--line);
  box-shadow: var(--shadow-1); font-size: 12.5px; color: var(--muted);
}
.trust-inner b { color: var(--ink-2); font-weight: 600; }
.trust-inner .t-item {
  display: inline-flex; align-items: center; gap: 7px;
}
.trust-inner .t-item i {
  width: 8px; height: 8px; border-radius: 50%; background: var(--ok);
  box-shadow: 0 0 0 3px var(--ok-soft); flex: 0 0 auto;
}

/* ===== Value props ===== */
.prop-grid {
  display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px;
}
.prop {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 18px 18px; box-shadow: var(--shadow-1);
  display: flex; flex-direction: column; gap: 10px;
  transition: transform .16s, box-shadow .16s, border-color .16s;
}
.prop:hover {
  transform: translateY(-2px); box-shadow: var(--shadow-2);
  border-color: #cfd8ea;
}
.prop-icon {
  width: 40px; height: 40px; border-radius: 11px;
  display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent-dk);
}
.prop-icon.seal { background: var(--seal-soft); color: var(--seal); }
.prop-icon.ok { background: var(--ok-soft); color: var(--ok); }
.prop-icon svg { width: 20px; height: 20px; }
.prop h3 { font-size: 16px; font-weight: 700; }
.prop p { font-size: 13.5px; color: var(--muted); line-height: 1.7; }
.prop .chip-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; padding-top: 6px; }

.chip {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 8px; border-radius: 999px;
  font-size: 11.5px; font-weight: 600; background: var(--bg-2); color: var(--ink-2);
}
.chip-seal { background: var(--seal-soft); color: #4b3d86; }
.chip-accent { background: var(--accent-soft); color: var(--accent-dk); }
.chip-ok { background: var(--ok-soft); color: var(--ok); }
.chip-outline { background: transparent; border: 1px solid var(--line); color: var(--muted); }

/* ===== Split feature ===== */
.split {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px; align-items: center;
}
.split-media {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-2);
  background: var(--paper); aspect-ratio: 1 / 1;
}
.split-media img { width: 100%; height: 100%; object-fit: cover; }
.split-copy .eyebrow { margin-bottom: 10px; }
.split-copy h2 { font-size: clamp(22px, 2.6vw, 28px); margin-bottom: 12px; }
.split-copy > p { color: var(--muted); margin-bottom: 16px; max-width: 48ch; }
.check-list { list-style: none; display: flex; flex-direction: column; gap: 10px; margin: 18px 0 22px; }
.check-list li {
  position: relative; padding-left: 26px; font-size: 14px; color: var(--ink-2); line-height: 1.6;
}
.check-list li::before {
  content: ""; position: absolute; left: 2px; top: 7px;
  width: 12px; height: 12px; border-radius: 4px;
  background: var(--ok); box-shadow: inset 0 0 0 2px rgba(255,255,255,.35);
}
.check-list.seal li::before { background: var(--seal); }

/* ===== Case spotlight ===== */
.case-band {
  background: linear-gradient(180deg, #fff 0%, var(--bg-2) 100%);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.case-card {
  max-width: var(--max); margin: 0 auto; padding: 56px 22px;
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr);
  gap: 22px; align-items: stretch;
}
.case-main {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 24px 22px; box-shadow: var(--shadow-1);
  border-left: 3px solid var(--seal);
}
.case-main .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.case-main h2 { font-size: 22px; line-height: 1.35; margin-bottom: 8px; }
.case-main .lede { color: var(--muted); font-size: 14px; max-width: 60ch; margin-bottom: 18px; }
.stat-row {
  display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px;
}
.stat {
  background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px;
}
.stat dt { font-size: 11px; color: var(--muted); margin-bottom: 3px; }
.stat dd { font-family: var(--num-font); font-size: 16px; font-weight: 700; color: var(--ink); }
.case-side {
  background: var(--rail); color: #d5deef; border-radius: var(--radius);
  padding: 22px; display: flex; flex-direction: column; gap: 14px;
  box-shadow: var(--shadow-2);
}
.case-side h3 { font-size: 15px; color: #fff; }
.case-side p { font-size: 13px; line-height: 1.7; color: #9aabc8; }
.risk-list { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.risk-list li {
  padding: 9px 11px; border-radius: 8px;
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .08);
  font-size: 12.5px; line-height: 1.55;
}
.risk-list .rid {
  font-family: var(--num-font); font-size: 11px; color: #f0a8a4; font-weight: 700;
  margin-right: 6px;
}
.case-side .btn { margin-top: auto; }

/* ===== Roles ===== */
.role-grid {
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px;
}
.role {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px 14px; box-shadow: var(--shadow-1); min-height: 150px;
}
.role .rn {
  font-size: 11px; font-weight: 700; letter-spacing: .08em; color: var(--seal); margin-bottom: 6px;
}
.role h3 { font-size: 14.5px; margin-bottom: 6px; }
.role p { font-size: 12.5px; color: var(--muted); line-height: 1.6; }

.roles-visual {
  margin-top: 22px; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--line); box-shadow: var(--shadow-1);
  max-height: 280px;
}
.roles-visual picture { display: block; width: 100%; height: 280px; }
.roles-visual img { width: 100%; height: 280px; object-fit: cover; object-position: center 40%; }
.split-media picture { display: block; width: 100%; height: 100%; }
.hero-visual picture { display: block; position: absolute; inset: 0; width: 100%; height: 100%; }

/* ===== Boundary ===== */
.bound-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 14px;
}
.bound {
  background: var(--paper); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow-1);
}
.bound h3 { font-size: 15px; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.bound ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.bound li {
  font-size: 13.5px; color: var(--ink-2); padding-left: 14px; position: relative; line-height: 1.55;
}
.bound li::before {
  content: ""; position: absolute; left: 0; top: 8px; width: 6px; height: 6px; border-radius: 2px;
  background: var(--accent);
}
.bound.ext li::before { background: var(--seal); }
.bound.ext { border-color: #ded6f7; background: linear-gradient(180deg, #fff, var(--seal-soft)); }

/* ===== CTA band ===== */
.cta-band {
  max-width: var(--max); margin: 0 auto 64px;
  padding: 0 22px;
}
.cta-inner {
  border-radius: 18px;
  background: linear-gradient(135deg, #101b30 0%, #1a2744 55%, #2a1f55 100%);
  color: #e8eefc; padding: 36px 32px;
  display: flex; flex-wrap: wrap; align-items: center; gap: 20px 28px;
  box-shadow: var(--shadow-3); border: 1px solid rgba(168, 188, 245, .18);
}
.cta-inner h2 { font-size: 24px; color: #fff; margin-bottom: 6px; }
.cta-inner p { color: #a9b8d4; font-size: 14px; max-width: 48ch; }
.cta-inner .actions { display: flex; flex-wrap: wrap; gap: 10px; margin-left: auto; }

/* ===== Footer ===== */
.lp-footer {
  border-top: 1px solid var(--line); background: var(--paper);
  padding: 28px 22px 36px;
}
.lp-footer-inner {
  max-width: var(--max); margin: 0 auto;
  display: flex; flex-wrap: wrap; gap: 16px 28px; align-items: start;
  font-size: 12.5px; color: var(--muted);
}
.lp-footer b { color: var(--ink-2); }
.lp-footer .note {
  flex: 1 1 280px; max-width: 62ch; line-height: 1.7;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .hero-grid { grid-template-columns: 1fr; min-height: 0; padding-top: 40px; padding-bottom: 48px; }
  .hero h1 { max-width: none; }
  .prop-grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
  .case-card { grid-template-columns: 1fr; }
  .role-grid { grid-template-columns: 1fr 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .lp-nav-links { display: none; }
}
@media (max-width: 640px) {
  .prop-grid, .bound-grid, .role-grid { grid-template-columns: 1fr; }
  .stat-row { grid-template-columns: 1fr 1fr; }
  .hero-actions .btn, .cta-inner .actions .btn { width: 100%; }
  .cta-inner { padding: 28px 20px; }
  .lp-nav-inner { padding: 10px 14px; gap: 10px; }
  .lp-brand { min-width: 0; flex: 1 1 auto; }
  .lp-brand > span { min-width: 0; }
  .lp-brand b {
    font-size: 12.5px; white-space: nowrap;
    overflow: hidden; text-overflow: ellipsis; max-width: 11.5em;
  }
  .lp-brand span span { display: none; }
  .lp-nav-actions { flex: 0 0 auto; }
  .lp-nav-actions .btn-outline { display: none; }
  .lp-nav-actions .btn { min-height: 36px; padding: 6px 12px; font-size: 12.5px; }
  .hero-grid { padding: 32px 16px 40px; gap: 28px; }
  .hero-meta { gap: 14px; }
  .hero-meta div { min-width: 42%; }
  .section { padding: 48px 16px; }
  .case-card { padding: 40px 16px; }
  .trust-strip { padding: 0 16px 4px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .hero-visual-fallback { animation: none; transform: none; position: absolute; }
}