:root {
  --ink: #0b1220;
  --ink-soft: #364154;
  --paper: #fff7ed;
  --surface: #ffffff;
  --surface-tint: #f5f8fc;
  --line: #d9e3f0;
  --line-strong: #a9b9d1;
  --brand: #0ea5e9;
  --brand-strong: #0369a1;
  --accent: #f97316;
  --accent-strong: #c2410c;
  --mint: #0f766e;
  --gold: #b45309;
  --danger: #dc2626;
  --hero-scrim: rgba(4, 12, 28, 0.72);
  --radius: 8px;
  --content: 1180px;
  --shadow-soft: 0 18px 55px rgba(11, 18, 32, 0.12);
  --shadow-hover: 0 24px 70px rgba(3, 105, 161, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  color: #ffffff;
  background: var(--brand-strong);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 16px;
  z-index: 50;
  transform: translateY(-140%);
  padding: 10px 14px;
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--ink);
  font-weight: 800;
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(217, 227, 240, 0.78);
  background: rgba(255, 247, 237, 0.93);
  backdrop-filter: blur(18px);
}

.promo-bar {
  border-bottom: 1px solid rgba(217, 227, 240, 0.74);
  color: #eff6ff;
  background: #0b1220;
}

.promo-inner {
  width: calc(100% - 32px);
  max-width: var(--content);
  min-height: 38px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  font-size: 13px;
}

.promo-inner strong {
  color: #ffffff;
  font-weight: 800;
}

.promo-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 34px;
  color: #bfdbfe;
  font-weight: 800;
  white-space: nowrap;
}

.promo-link:hover {
  color: #ffffff;
}

.nav-inner {
  width: calc(100% - 32px);
  max-width: var(--content);
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  font-size: 18px;
  font-weight: 900;
  letter-spacing: 0;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  color: #ffffff;
  background: #0b4a7a;
  box-shadow: 0 12px 30px rgba(14, 165, 233, 0.24);
}

.brand-mark .icon {
  width: 21px;
  height: 21px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 800;
}

.nav-menu a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border-radius: var(--radius);
  padding: 0 12px;
  transition: color 180ms ease, background 180ms ease;
}

.nav-menu a:hover,
.nav-menu a[aria-current="page"] {
  color: var(--brand-strong);
  background: rgba(14, 165, 233, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  background: var(--surface);
  cursor: pointer;
}

.menu-toggle .icon {
  margin: auto;
}

.button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 0 16px;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-size: 14px;
  font-weight: 900;
  line-height: 1;
  cursor: pointer;
  transition: transform 180ms ease, color 180ms ease, background 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button:active {
  transform: translateY(0);
}

.button:focus-visible,
.menu-toggle:focus-visible,
.nav-menu a:focus-visible,
.promo-link:focus-visible {
  outline: 3px solid rgba(14, 165, 233, 0.36);
  outline-offset: 2px;
}

.button-primary {
  color: #ffffff;
  background: var(--accent);
  box-shadow: 0 14px 34px rgba(249, 115, 22, 0.28);
}

.button-primary:hover {
  background: var(--accent-strong);
  box-shadow: 0 18px 46px rgba(249, 115, 22, 0.34);
}

.button-dark {
  color: #ffffff;
  background: var(--brand-strong);
  box-shadow: 0 14px 34px rgba(3, 105, 161, 0.24);
}

.button-dark:hover {
  background: #075985;
  box-shadow: var(--shadow-hover);
}

.button-light {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.13);
  backdrop-filter: blur(14px);
}

.button-light:hover {
  border-color: rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.2);
}

.button-ghost {
  color: var(--ink);
  border-color: var(--line);
  background: var(--surface);
}

.button-ghost:hover {
  color: var(--brand-strong);
  border-color: rgba(14, 165, 233, 0.5);
  box-shadow: 0 12px 28px rgba(11, 18, 32, 0.08);
}

.icon {
  width: 18px;
  height: 18px;
  stroke-width: 2.2;
  flex: 0 0 auto;
}

.hero {
  position: relative;
  min-height: calc(92svh - 106px);
  color: #ffffff;
  background-image:
    linear-gradient(90deg, rgba(4, 12, 28, 0.9), rgba(4, 12, 28, 0.66) 42%, rgba(4, 12, 28, 0.26)),
    url("%E6%B5%B7%E6%8A%A5.png");
  background-size: cover;
  background-position: center;
  isolation: isolate;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 130px;
  background: linear-gradient(180deg, rgba(255, 247, 237, 0), var(--paper));
  pointer-events: none;
  z-index: -1;
}

.hero-inner {
  width: calc(100% - 32px);
  max-width: var(--content);
  min-height: calc(92svh - 106px);
  margin: 0 auto;
  padding: 88px 0 84px;
  display: flex;
  align-items: center;
}

.hero-copy {
  width: min(650px, 100%);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 34px;
  margin: 0 0 18px;
  border: 1px solid rgba(191, 219, 254, 0.42);
  border-radius: 999px;
  padding: 0 12px;
  color: #dbeafe;
  background: rgba(11, 18, 32, 0.44);
  font-size: 13px;
  font-weight: 800;
}

.hero h1 {
  margin: 0;
  max-width: 12ch;
  color: #ffffff;
  font-size: clamp(42px, 8vw, 88px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-lede {
  max-width: 660px;
  margin: 24px 0 0;
  color: #e6eefc;
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.75;
}

.hero-actions {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-note {
  margin-top: 18px;
  color: #bfdbfe;
  font-size: 14px;
}

.hero-badges {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-badges span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 999px;
  padding: 0 12px;
  color: #f8fafc;
  background: rgba(255, 255, 255, 0.1);
  font-size: 13px;
  font-weight: 800;
}

.section {
  padding: 84px 0;
}

.section-compact {
  padding: 60px 0;
}

.section-alt {
  background: #ffffff;
}

.section-deep {
  color: #ffffff;
  background: #0b1220;
}

.container {
  width: calc(100% - 32px);
  max-width: var(--content);
  margin: 0 auto;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 32px;
}

.section-heading.center {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-kicker {
  margin: 0 0 10px;
  color: var(--brand-strong);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}

.section-deep .section-kicker {
  color: #7dd3fc;
}

.section-heading h2,
.page-hero h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 54px);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-deep .section-heading h2 {
  color: #ffffff;
}

.section-heading p,
.page-hero p {
  margin: 16px 0 0;
  color: var(--ink-soft);
  font-size: 17px;
}

.section-deep .section-heading p {
  color: #cbd5e1;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--line);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.proof-item {
  min-height: 118px;
  padding: 22px;
  background: var(--surface);
}

.proof-item strong {
  display: block;
  color: var(--ink);
  font-size: 28px;
  line-height: 1;
}

.proof-item span {
  display: block;
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.feature-card,
.mode-card,
.doc-card,
.value-card,
.policy-card,
.step-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(11, 18, 32, 0.07);
}

.feature-card {
  min-height: 250px;
  padding: 24px;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  border-color: rgba(14, 165, 233, 0.42);
  box-shadow: var(--shadow-hover);
}

.feature-icon,
.doc-icon,
.value-icon,
.step-index {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  color: #ffffff;
  background: var(--brand-strong);
}

.feature-card:nth-child(2) .feature-icon,
.value-card:nth-child(2) .value-icon {
  background: var(--accent);
}

.feature-card:nth-child(3) .feature-icon,
.value-card:nth-child(3) .value-icon {
  background: var(--mint);
}

.feature-card:nth-child(4) .feature-icon,
.value-card:nth-child(4) .value-icon {
  background: var(--gold);
}

.feature-card h3,
.mode-card h3,
.doc-card h3,
.value-card h3,
.policy-card h3,
.step-card h3 {
  margin: 18px 0 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.3;
}

.feature-card p,
.mode-card p,
.doc-card p,
.value-card p,
.policy-card p,
.step-card p {
  margin: 10px 0 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.mode-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  gap: 34px;
  align-items: start;
}

.mode-layout > * {
  min-width: 0;
}

.poster-frame {
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  overflow: hidden;
  background: #111827;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
}

.poster-frame img {
  width: 100%;
  aspect-ratio: auto;
  object-fit: contain;
}

.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.mode-card {
  min-height: 168px;
  padding: 22px;
  background: rgba(255, 255, 255, 0.96);
}

.mode-card .tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 999px;
  padding: 0 10px;
  color: #075985;
  background: #e0f2fe;
  font-size: 12px;
  font-weight: 900;
}

.slogan-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.slogan {
  min-height: 180px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--surface-tint);
}

.slogan strong {
  display: block;
  color: var(--ink);
  font-size: 26px;
  line-height: 1.18;
}

.slogan p {
  margin: 14px 0 0;
  color: var(--ink-soft);
}

.download-band {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: 28px;
  align-items: center;
  border: 1px solid rgba(191, 219, 254, 0.2);
  border-radius: var(--radius);
  padding: 34px;
  background:
    linear-gradient(120deg, rgba(14, 165, 233, 0.16), rgba(249, 115, 22, 0.13)),
    #101827;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.22);
}

.download-band h2 {
  margin: 0;
  color: #ffffff;
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.12;
}

.download-band p {
  margin: 16px 0 0;
  color: #dbeafe;
}

.download-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.download-actions .button {
  min-height: 58px;
  width: 100%;
}

.download-meta {
  margin-top: 12px;
  color: #bfdbfe;
  font-size: 13px;
}

.download-choice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.download-card {
  min-height: 320px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(11, 18, 32, 0.07);
}

.download-card h3 {
  margin: 18px 0 0;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.2;
}

.download-card p {
  margin: 12px 0 22px;
  color: var(--ink-soft);
}

.download-card .button {
  width: 100%;
  min-height: 54px;
}

.file-meta {
  display: block;
  margin-top: 12px;
  color: var(--ink-soft);
  font-size: 13px;
  word-break: break-all;
}

.safety-callout {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  margin-bottom: 24px;
  border: 1px solid rgba(14, 165, 233, 0.26);
  border-radius: var(--radius);
  padding: 22px;
  background: #eff6ff;
}

.safety-callout h3 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
}

.safety-callout p {
  margin: 8px 0 0;
  color: var(--ink-soft);
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.screen-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(11, 18, 32, 0.08);
}

.screen-card img {
  width: 100%;
  aspect-ratio: 665 / 620;
  object-fit: cover;
  background: #075985;
}

.screen-card div {
  padding: 22px;
}

.screen-card h3 {
  margin: 14px 0 0;
  color: var(--ink);
  font-size: 22px;
}

.screen-card p {
  margin: 10px 0 0;
  color: var(--ink-soft);
}

.page-hero {
  padding: 76px 0 52px;
  background:
    linear-gradient(120deg, rgba(224, 242, 254, 0.95), rgba(255, 247, 237, 0.95)),
    var(--paper);
}

.page-hero .container {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
  gap: 32px;
  align-items: end;
}

.page-hero h1 {
  max-width: 11ch;
}

.page-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.doc-grid,
.value-grid,
.policy-grid,
.step-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.doc-card,
.value-card,
.policy-card,
.step-card {
  padding: 24px;
}

.step-card {
  position: relative;
}

.step-index {
  color: #ffffff;
  font-size: 16px;
  font-weight: 900;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 12px 32px rgba(11, 18, 32, 0.07);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 760px;
}

th,
td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--ink);
  background: #f8fafc;
  font-size: 14px;
  font-weight: 900;
}

td {
  color: var(--ink-soft);
  font-size: 14px;
}

tr:last-child td {
  border-bottom: 0;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: 0 10px 28px rgba(11, 18, 32, 0.06);
}

.faq-list summary {
  min-height: 58px;
  padding: 17px 20px;
  color: var(--ink);
  font-weight: 900;
  cursor: pointer;
}

.faq-list p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--ink-soft);
}

.text-panel {
  max-width: 860px;
  color: var(--ink-soft);
  font-size: 16px;
}

.text-panel h2 {
  margin: 36px 0 10px;
  color: var(--ink);
  font-size: 26px;
  line-height: 1.2;
}

.text-panel h2:first-child {
  margin-top: 0;
}

.text-panel p {
  margin: 10px 0;
}

.text-panel ul {
  margin: 12px 0 0;
  padding-left: 20px;
}

.text-panel li {
  margin: 8px 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #ffffff;
}

.footer-inner {
  width: calc(100% - 32px);
  max-width: var(--content);
  margin: 0 auto;
  padding: 34px 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
}

.footer-meta {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 13px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px;
  color: var(--ink-soft);
  font-size: 13px;
  font-weight: 800;
}

.footer-links a:hover {
  color: var(--brand-strong);
}

@media (max-width: 1020px) {
  .feature-grid,
  .proof-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .mode-layout,
  .download-band,
  .download-choice-grid,
  .guide-grid,
  .page-hero .container {
    grid-template-columns: 1fr;
  }

  .page-actions {
    justify-content: flex-start;
  }

  .doc-grid,
  .value-grid,
  .policy-grid,
  .step-grid,
  .slogan-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .promo-inner {
    min-height: 42px;
    justify-content: center;
    text-align: center;
  }

  .promo-link {
    display: none;
  }

  .nav-inner {
    min-height: 64px;
  }

  .nav-actions .button-primary {
    display: none;
  }

  .menu-toggle {
    display: inline-grid;
  }

  .nav-menu {
    position: absolute;
    top: 106px;
    left: 16px;
    right: 16px;
    display: grid;
    grid-template-columns: 1fr;
    gap: 4px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 8px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-soft);
    transform-origin: top;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  }

  .nav-menu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }

  .nav-menu a {
    width: 100%;
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
    background-position: 60% center;
  }

  .hero-inner {
    min-height: auto;
    padding: 72px 0 70px;
  }

  .hero h1 {
    max-width: 9ch;
  }

  .hero-lede {
    max-width: 92%;
  }

  .hero-actions .button {
    width: 100%;
  }

  .section {
    padding: 64px 0;
  }

  .section-compact {
    padding: 48px 0;
  }

  .feature-grid,
  .proof-strip,
  .doc-grid,
  .value-grid,
  .policy-grid,
  .step-grid,
  .mode-grid,
  .slogan-list,
  .download-actions {
    grid-template-columns: 1fr;
  }

  .proof-item,
  .feature-card,
  .mode-card,
  .doc-card,
  .value-card,
  .policy-card,
  .step-card,
  .slogan {
    min-height: 0;
  }

  .download-band {
    padding: 24px;
  }

  .page-hero {
    padding: 58px 0 44px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}