:root {
  --ink: #171114;
  --muted: #675a61;
  --soft: #f7f4f2;
  --line: rgba(32, 20, 24, 0.14);
  --red: #ff3428;
  --coral: #ff8069;
  --teal: #60dde4;
  --steel: #2d3748;
  --glass: rgba(255, 255, 255, 0.72);
  --dark: #171116;
  --shadow: 0 22px 70px rgba(56, 15, 17, 0.16);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, #fff9f4 0%, #f8f6f8 42%, #edf9fa 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}
a { color: inherit; text-decoration: none; }
p { line-height: 1.82; }
img { max-width: 100%; display: block; }
:focus-visible { outline: 3px solid rgba(96, 221, 228, 0.75); outline-offset: 3px; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(24px, calc((100% - 1180px) / 2));
  border-bottom: 1px solid rgba(255, 255, 255, 0.52);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
}
.brand-lockup { display: inline-flex; align-items: center; gap: 12px; min-width: 188px; }
.brand-lockup b { display: block; font-size: 17px; }
.brand-lockup small { display: block; color: var(--muted); font-size: 12px; margin-top: 2px; }
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.85), rgba(255, 52, 40, 0.38)),
    linear-gradient(45deg, var(--red), var(--teal));
  border: 1px solid rgba(255, 255, 255, 0.76);
  box-shadow: inset 0 1px 10px rgba(255, 255, 255, 0.7), 0 10px 26px rgba(255, 52, 40, 0.28);
}
.desktop-nav { display: flex; gap: 6px; align-items: center; }
.desktop-nav a, .mobile-nav summary {
  padding: 10px 13px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: #33262c;
  font-size: 14px;
}
.desktop-nav a:hover, .desktop-nav a[aria-current="page"], .mobile-nav summary {
  border-color: rgba(255, 52, 40, 0.2);
  background: rgba(255, 255, 255, 0.66);
}
.mobile-nav { display: none; position: relative; }
.mobile-nav summary { list-style: none; cursor: pointer; }
.mobile-nav summary::-webkit-details-marker { display: none; }
.mobile-nav nav {
  position: absolute;
  right: 0;
  top: 46px;
  display: grid;
  min-width: 190px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.96);
  box-shadow: var(--shadow);
}
.mobile-nav nav a { padding: 11px 12px; border-radius: 12px; }
.mobile-nav nav a:hover { background: #fff0ed; }
.hero-panel {
  max-width: 1220px;
  margin: 26px auto 0;
  padding: 12px;
  color: white;
  border-radius: 34px;
  background:
    linear-gradient(110deg, rgba(23,17,22,1) 0%, rgba(31,21,26,.98) 43%, rgba(255,52,40,.28) 100%);
  box-shadow: 0 28px 80px rgba(22, 12, 18, 0.32);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(420px, 1.12fr);
  gap: 16px;
  align-items: stretch;
  min-height: 620px;
}
.hero-copy {
  padding: 58px 22px 58px 46px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.eyebrow {
  margin: 0 0 13px;
  color: var(--red);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}
.hero-panel .eyebrow { color: #ffad9e; }
h1, h2, h3 { margin: 0; line-height: 1.12; letter-spacing: 0; }
.hero-copy h1 { max-width: 720px; font-size: 58px; font-weight: 900; }
.hero-lead, .lead {
  max-width: 760px;
  color: rgba(255,255,255,.76);
  font-size: 18px;
}
.lead { color: var(--muted); }
.hero-actions, .inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.primary-action, .secondary-action, .inline-actions a, .signal-pane a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 750;
}
.primary-action {
  color: white;
  background: linear-gradient(135deg, var(--red), var(--coral));
  box-shadow: 0 14px 32px rgba(255, 52, 40, 0.32);
}
.secondary-action {
  color: white;
  border: 1px solid rgba(255,255,255,.28);
  background: rgba(255,255,255,.08);
}
.hero-visual {
  margin: 0;
  min-height: 100%;
  border-radius: 26px;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,.2);
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.task-strip {
  max-width: 1180px;
  margin: -34px auto 0;
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid rgba(255,255,255,.72);
  border-radius: 26px;
  overflow: hidden;
  background: rgba(255,255,255,.64);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow);
}
.task-link { padding: 22px; background: rgba(255,255,255,.58); min-height: 148px; }
.task-link b { display: block; font-size: 18px; margin-bottom: 10px; }
.task-link span { display: block; color: var(--muted); line-height: 1.65; }
.section-block, .split-feature, .inner-layout, .single-page, .article-layout {
  max-width: 1180px;
  margin: 74px auto 0;
  padding-left: 24px;
  padding-right: 24px;
}
.section-heading { max-width: 780px; margin-bottom: 26px; }
.section-heading h2, .signal-pane h2 { font-size: 36px; }
.section-heading p { color: var(--muted); font-size: 17px; }
.table-shell {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,.74);
  box-shadow: var(--shadow);
}
table { width: 100%; border-collapse: collapse; min-width: 760px; }
th, td { padding: 20px; text-align: left; vertical-align: top; border-bottom: 1px solid rgba(32,20,24,.1); line-height: 1.72; }
thead th { color: #7b3030; background: rgba(255, 52, 40, 0.08); font-size: 14px; }
tbody tr:last-child th, tbody tr:last-child td { border-bottom: 0; }
.split-feature {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(360px, 1.12fr);
  gap: 22px;
  align-items: stretch;
}
.split-feature.pale .signal-pane { color: var(--ink); background: rgba(255,255,255,.72); }
.split-feature.pale .signal-pane p { color: var(--muted); }
.signal-pane {
  padding: 34px;
  border-radius: 28px;
  color: white;
  background: linear-gradient(135deg, #1f161b, #432429 62%, #0d3238);
  box-shadow: var(--shadow);
}
.signal-pane p { color: rgba(255,255,255,.76); }
.signal-pane a { color: white; background: rgba(255,255,255,.13); border: 1px solid rgba(255,255,255,.22); margin-top: 12px; }
.signal-rows {
  display: grid;
  gap: 12px;
}
.signal-rows div, .notice-grid div, .help-groups div {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255,255,255,.74);
  box-shadow: 0 12px 38px rgba(56,15,17,.08);
}
.signal-rows b, .notice-grid b, .help-groups b { display: block; margin-bottom: 7px; color: #5f1b1c; }
.signal-rows span, .notice-grid span { color: var(--muted); line-height: 1.65; }
.article-ledger {
  display: grid;
  gap: 10px;
}
.article-row {
  display: grid;
  grid-template-columns: 106px minmax(0, 1fr) 96px;
  gap: 16px;
  align-items: center;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.72);
}
.article-row b { line-height: 1.45; }
.article-row span, .article-row em, .article-row small { color: var(--muted); font-style: normal; line-height: 1.58; }
.article-row.large { grid-template-columns: 110px minmax(0, 1fr) 100px; }
.article-row.large small { grid-column: 2 / 4; }
.faq-list { display: grid; gap: 12px; }
details {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255,255,255,.72);
}
summary { cursor: pointer; font-weight: 800; }
details p { color: var(--muted); margin-bottom: 0; }
.page-hero {
  min-height: 360px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 52px;
  border-radius: 32px;
  background:
    linear-gradient(115deg, rgba(255,255,255,.8), rgba(255,255,255,.52)),
    linear-gradient(135deg, rgba(255,52,40,.14), rgba(96,221,228,.16));
  border: 1px solid rgba(255,255,255,.78);
  box-shadow: var(--shadow);
}
.compact-hero { min-height: 300px; }
.page-hero h1, .single-page h1, .article-paper h1 { font-size: 46px; max-width: 900px; }
.platform-grid, .notice-grid, .help-groups, .scene-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.platform-lane, .scene-columns article {
  padding: 28px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.76);
  box-shadow: 0 14px 48px rgba(56,15,17,.08);
  scroll-margin-top: 96px;
}
.platform-lane p, .scene-columns p, .platform-lane li, .scene-columns li, .note-column p, .long-copy p { color: var(--muted); line-height: 1.82; }
.source-check {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(360px, 1.15fr);
  gap: 20px;
  align-items: center;
  max-width: 1180px;
  margin: 74px auto 0;
  padding: 32px;
  border-radius: 30px;
  background: #171116;
  color: white;
  box-shadow: var(--shadow);
}
.source-check p { color: rgba(255,255,255,.74); }
.step-flow { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; counter-reset: step; }
.step-flow li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 44px minmax(0,1fr);
  gap: 12px;
  padding: 16px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 18px;
  background: rgba(255,255,255,.08);
}
.step-flow li::before {
  content: counter(step);
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 14px;
  color: white;
  background: var(--red);
  font-weight: 900;
}
.step-flow b { display: block; }
.step-flow span { display: block; color: rgba(255,255,255,.72); line-height: 1.6; }
.device-index {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 12px;
  margin-top: 28px;
}
.device-index a {
  min-height: 156px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255,255,255,.74);
  box-shadow: 0 14px 38px rgba(56,15,17,.08);
}
.device-index b { display: block; margin-bottom: 10px; }
.device-index span { color: var(--muted); line-height: 1.6; }
.record-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  background: rgba(255,255,255,.72);
}
.record-grid span { padding: 24px 14px; text-align: center; border-right: 1px solid var(--line); font-weight: 800; color: #5f1b1c; }
.record-grid span:last-child { border-right: 0; }
.single-page {
  max-width: 920px;
  min-height: 58vh;
  padding-top: 72px;
}
.long-copy {
  margin-top: 24px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: rgba(255,255,255,.76);
}
.inline-actions a {
  border: 1px solid rgba(255,52,40,.2);
  background: rgba(255,255,255,.7);
  color: #6a2322;
}
.article-layout { max-width: 940px; }
.article-paper {
  padding: 46px;
  border-radius: 30px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.82);
  box-shadow: var(--shadow);
}
.article-paper section { margin-top: 34px; }
.article-paper h2 { font-size: 28px; }
.article-paper p { color: var(--muted); }
.article-date { color: #8d6262; font-weight: 750; }
.article-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 38px;
}
.article-links a {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  color: #6a2322;
  font-weight: 750;
}
.site-footer {
  max-width: 1180px;
  margin: 88px auto 0;
  padding: 34px 24px 54px;
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(140px, 1fr));
  gap: 24px;
  border-top: 1px solid var(--line);
}
.site-footer p { color: var(--muted); margin-bottom: 0; }
.site-footer nav { display: grid; gap: 9px; align-content: start; }
.site-footer nav b { color: #5f1b1c; margin-bottom: 4px; }
.site-footer nav a { color: var(--muted); }
.site-footer nav a:hover { color: var(--red); }
[id] { scroll-margin-top: 96px; }
@media (max-width: 980px) {
  .desktop-nav { display: none; }
  .mobile-nav { display: block; }
  .hero-grid, .split-feature, .source-check { grid-template-columns: 1fr; }
  .hero-grid { min-height: 0; }
  .hero-copy { padding: 42px 26px; }
  .hero-copy h1 { font-size: 44px; }
  .hero-visual { min-height: 360px; }
  .task-strip { grid-template-columns: repeat(2, minmax(0,1fr)); margin-top: 20px; }
  .platform-grid, .notice-grid, .help-groups, .scene-columns, .device-index { grid-template-columns: 1fr; }
  .record-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .record-grid span:nth-child(3) { border-right: 0; }
  .site-footer { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .site-header { padding: 12px 16px; }
  .brand-lockup { min-width: 0; }
  .brand-lockup small { max-width: 136px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .hero-panel { margin: 12px 10px 0; border-radius: 24px; }
  .hero-copy { padding: 34px 18px; }
  .hero-copy h1, .page-hero h1, .single-page h1, .article-paper h1 { font-size: 34px; }
  .hero-lead, .lead { font-size: 16px; }
  .hero-visual { min-height: 250px; border-radius: 20px; }
  .task-strip { margin: 16px 10px 0; grid-template-columns: 1fr; border-radius: 20px; }
  .section-block, .split-feature, .inner-layout, .single-page, .article-layout { margin-top: 48px; padding-left: 16px; padding-right: 16px; }
  .section-heading h2, .signal-pane h2 { font-size: 28px; }
  .page-hero, .article-paper, .source-check { padding: 26px; border-radius: 24px; }
  .article-row, .article-row.large { grid-template-columns: 1fr; gap: 8px; }
  .article-row.large small { grid-column: auto; }
  .record-grid { grid-template-columns: 1fr 1fr; }
  .record-grid span { border-bottom: 1px solid var(--line); }
  .site-footer { grid-template-columns: 1fr; padding-left: 16px; padding-right: 16px; }
}