:root {
  --ink: #152623;
  --muted: #5d6b66;
  --surface: #ffffff;
  --wash: #f5faf7;
  --wash-strong: #e4f3ec;
  --teal: #0b7c72;
  --teal-dark: #064c46;
  --coral: #f46036;
  --amber: #f4b63f;
  --mint: #9ed9c3;
  --line: #d8e5df;
  --line-strong: #bfd5cc;
  --shadow: 0 24px 70px rgba(21, 38, 35, 0.16);
  --soft-shadow: 0 18px 44px rgba(21, 38, 35, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: #f8fbf8;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  letter-spacing: 0;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 48px;
  border-bottom: 1px solid rgba(216, 229, 223, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
  box-shadow: 0 8px 30px rgba(21, 38, 35, 0.04);
}

.brand,
.site-nav,
.hero-actions,
.app-title-row,
.screen-status,
.result-strip,
.mini-grid,
.download-inner,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 800;
  font-size: 1.02rem;
}

.brand img {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  box-shadow: 0 8px 18px rgba(11, 124, 114, 0.22);
}

.site-nav {
  gap: 26px;
  padding: 9px 14px;
  border: 1px solid rgba(216, 229, 223, 0.78);
  border-radius: 8px;
  background: rgba(245, 250, 247, 0.74);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--teal-dark);
}

.header-cta,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  border-radius: 8px;
  font-weight: 800;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.header-cta {
  min-height: 40px;
  padding: 0 18px;
  color: #ffffff;
  background: var(--teal);
  font-size: 0.92rem;
  box-shadow: 0 12px 26px rgba(11, 124, 114, 0.2);
}

.primary-button {
  padding: 0 28px;
  color: #ffffff;
  background: var(--teal);
  box-shadow: 0 14px 32px rgba(11, 124, 114, 0.22);
}

.secondary-button {
  padding: 0 24px;
  color: var(--teal-dark);
  border: 1px solid var(--line);
  background: #ffffff;
}

.header-cta:hover,
.primary-button:hover {
  transform: translateY(-2px);
  background: var(--teal-dark);
  box-shadow: 0 18px 34px rgba(11, 124, 114, 0.28);
}

.secondary-button:hover {
  transform: translateY(-2px);
  border-color: var(--teal);
  color: var(--teal);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
  gap: 48px;
  align-items: center;
  min-height: 600px;
  padding: 56px 64px 48px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: #f8fbf8;
}

.hero::before {
  position: absolute;
  inset: 0 0 0 55%;
  content: "";
  background: #e3f2ec;
}

.hero-copy,
.product-visual,
.section-inner,
.download-inner,
.site-footer {
  position: relative;
  z-index: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin: 0 0 14px;
  padding: 0 11px;
  border: 1px solid rgba(244, 96, 54, 0.24);
  border-radius: 8px;
  color: var(--coral);
  background: #fff2ec;
  font-size: 0.86rem;
  font-weight: 900;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 24px;
  font-size: 3.55rem;
  line-height: 1.05;
  text-wrap: balance;
}

h2 {
  margin-bottom: 16px;
  font-size: 2.35rem;
  line-height: 1.18;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.18rem;
  line-height: 1.3;
}

.hero-text {
  max-width: 680px;
  margin-bottom: 28px;
  color: var(--muted);
  font-size: 1.12rem;
  line-height: 1.78;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(110px, 1fr));
  gap: 12px;
  max-width: 540px;
  margin: 0;
}

.hero-facts div {
  position: relative;
  overflow: hidden;
  padding: 16px 16px 15px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: 0 12px 28px rgba(21, 38, 35, 0.05);
}

.hero-facts div::before {
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  content: "";
  background: var(--mint);
}

.hero-facts dt {
  color: var(--muted);
  font-size: 0.78rem;
}

.hero-facts dd {
  margin: 4px 0 0;
  font-weight: 850;
}

.product-visual {
  position: relative;
  display: grid;
  place-items: start center;
  height: 504px;
  min-height: 0;
  padding-top: 24px;
  overflow: hidden;
}

.product-visual::before {
  position: absolute;
  inset: 44px 40px 34px 38px;
  content: "";
  border: 1px solid rgba(191, 213, 204, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.38);
  box-shadow: inset 0 0 0 8px rgba(255, 255, 255, 0.24);
}

.phone-shell {
  position: relative;
  z-index: 1;
  width: 318px;
  min-height: 626px;
  padding: 13px;
  border-radius: 34px;
  background: #16211f;
  box-shadow: var(--shadow);
  transform: translateX(10px) rotate(2deg);
}

.phone-screen {
  min-height: 600px;
  padding: 18px;
  border-radius: 26px;
  background: #f9fcfa;
  overflow: hidden;
}

.screen-status {
  justify-content: space-between;
  color: #41514c;
  font-size: 0.72rem;
  font-weight: 800;
}

.app-title-row {
  gap: 12px;
  margin: 22px 0;
}

.app-title-row img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
}

.app-title-row strong,
.app-title-row span,
.guide-list span,
.mini-grid span,
.result-strip span {
  display: block;
}

.app-title-row strong {
  line-height: 1.2;
}

.app-title-row span {
  color: var(--muted);
  font-size: 0.78rem;
}

.triage-panel {
  padding: 20px;
  border-radius: 8px;
  color: #ffffff;
  background: var(--teal);
  box-shadow: 0 16px 32px rgba(11, 124, 114, 0.2);
}

.panel-label {
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.76rem;
  font-weight: 800;
}

.triage-panel h2 {
  margin-bottom: 16px;
  font-size: 1.34rem;
  line-height: 1.25;
}

.signal-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.signal-list span {
  padding: 6px 9px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.16);
  font-size: 0.72rem;
  font-weight: 800;
}

.result-strip {
  justify-content: space-between;
  margin-top: 16px;
  padding: 16px;
  border-radius: 8px;
  background: #fff0e9;
  border: 1px solid #ffcbb9;
  box-shadow: 0 12px 26px rgba(180, 53, 24, 0.08);
}

.result-strip span {
  color: #8f4a35;
  font-size: 0.76rem;
  font-weight: 800;
}

.result-strip strong {
  color: #b73518;
  font-size: 1.04rem;
}

.mini-grid {
  gap: 12px;
  margin-top: 12px;
}

.mini-grid div {
  flex: 1;
  min-height: 92px;
  padding: 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #ffffff;
}

.mini-grid span,
.guide-list p {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
}

.mini-grid strong {
  display: block;
  line-height: 1.28;
}

.guide-list {
  margin-top: 14px;
  padding: 16px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #ffffff;
}

.guide-list span {
  margin-top: 8px;
  padding-left: 14px;
  color: #33423e;
  font-size: 0.88rem;
  font-weight: 750;
  border-left: 3px solid var(--mint);
}

.floating-note {
  position: absolute;
  z-index: 2;
  width: 174px;
  padding: 16px;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--soft-shadow);
}

.floating-note strong {
  display: block;
  color: var(--teal-dark);
  font-size: 1.65rem;
  line-height: 1;
}

.floating-note span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 750;
}

.note-one {
  top: 94px;
  right: 24px;
  border-top: 5px solid var(--amber);
}

.note-two {
  left: 18px;
  bottom: 92px;
  border-top: 5px solid var(--coral);
}

.section {
  padding: 96px 48px;
}

.section-inner {
  max-width: 1160px;
  margin: 0 auto;
}

.intro-band,
.knowledge-band {
  background: var(--teal-dark);
  color: #ffffff;
}

.intro-layout,
.knowledge-layout,
.workflow-layout,
.trust-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 56px;
  align-items: start;
}

.intro-band .eyebrow,
.knowledge-band .eyebrow {
  color: var(--amber);
  border-color: rgba(244, 182, 63, 0.32);
  background: rgba(244, 182, 63, 0.1);
}

.intro-layout p,
.knowledge-layout p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.05rem;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 38px;
}

.section-heading p {
  color: var(--muted);
  font-size: 1.02rem;
}

.section-heading.compact {
  max-width: 760px;
}

.level-grid,
.scene-grid {
  display: grid;
  gap: 18px;
}

.level-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.level-card,
.scene-card,
.trust-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 14px 34px rgba(21, 38, 35, 0.05);
}

.level-card {
  position: relative;
  overflow: hidden;
  min-height: 282px;
  padding: 24px;
  border-top-width: 6px;
}

.level-card::after {
  position: absolute;
  right: 18px;
  bottom: 16px;
  width: 64px;
  height: 64px;
  content: "";
  border-radius: 8px;
  background: var(--wash);
  opacity: 0.72;
  z-index: 0;
}

.level-card > * {
  position: relative;
  z-index: 1;
}

.level-card p,
.scene-card p,
.trust-grid p,
.step-list p {
  margin-bottom: 0;
  color: var(--muted);
}

.level-index {
  display: inline-flex;
  margin-bottom: 34px;
  color: rgba(21, 38, 35, 0.34);
  font-size: 0.86rem;
  font-weight: 900;
}

.level-now {
  border-top-color: var(--coral);
}

.level-day {
  border-top-color: var(--amber);
}

.level-soon {
  border-top-color: var(--teal);
}

.level-watch {
  border-top-color: var(--mint);
}

.scene-band {
  background: var(--wash);
}

.scene-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.scene-card {
  position: relative;
  overflow: hidden;
  min-height: 192px;
  padding: 24px;
}

.scene-card::after {
  position: absolute;
  inset: auto 0 0 0;
  height: 4px;
  content: "";
  background: var(--mint);
}

.scene-mark {
  display: block;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  border-radius: 8px;
}

.digestive {
  background: var(--coral);
}

.breath {
  background: var(--teal);
}

.urinary {
  background: var(--amber);
}

.skin {
  background: var(--mint);
}

.trauma {
  background: #315f57;
}

.emergency {
  background: #ff8a65;
}

.workflow-section {
  background: #ffffff;
}

.sticky-heading {
  position: sticky;
  top: 104px;
  margin-bottom: 0;
}

.step-list {
  display: grid;
  gap: 16px;
}

.step-list article {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 18px;
  min-height: 144px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 28px rgba(21, 38, 35, 0.045);
}

.step-list span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 8px;
  color: #ffffff;
  background: var(--teal);
  font-weight: 900;
}

.knowledge-layout {
  grid-template-columns: 1fr 0.92fr;
  align-items: center;
}

.topic-stack {
  display: grid;
  gap: 12px;
}

.topic-stack span {
  display: block;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  color: #ffffff;
  background: rgba(255, 255, 255, 0.08);
  font-weight: 850;
}

.trust-grid article {
  padding: 30px;
}

.notice-box {
  border-color: #ffcbb9;
  background: #fff5f0;
}

.notice-box h3 {
  color: #b73518;
}

.download-section {
  padding: 42px 48px 78px;
  background: #ffffff;
}

.download-inner {
  justify-content: space-between;
  gap: 28px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  color: #ffffff;
  background: var(--teal-dark);
  box-shadow: var(--soft-shadow);
}

.download-inner img {
  width: 78px;
  height: 78px;
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(11, 124, 114, 0.2);
}

.download-inner h2 {
  margin-bottom: 0;
  font-size: 1.7rem;
}

.download-inner .eyebrow {
  color: var(--amber);
  border-color: rgba(244, 182, 63, 0.32);
  background: rgba(244, 182, 63, 0.1);
}

.download-inner .primary-button {
  color: var(--teal-dark);
  background: #ffffff;
  box-shadow: none;
}

.download-inner .primary-button:hover {
  color: #ffffff;
  background: var(--coral);
}

.site-footer {
  justify-content: space-between;
  gap: 24px;
  padding: 34px 48px;
  color: rgba(255, 255, 255, 0.72);
  background: #10211f;
}

.site-footer div {
  display: grid;
  gap: 2px;
}

.site-footer strong {
  color: #ffffff;
}

.site-footer p {
  max-width: 620px;
  margin: 0;
  font-size: 0.9rem;
}

@media (max-width: 1080px) {
  .site-header {
    padding: 0 28px;
  }

  .site-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 34px;
    min-height: auto;
    padding: 60px 28px 78px;
    background: #f8fbf8;
  }

  .hero::before {
    display: none;
  }

  h1 {
    max-width: 760px;
    font-size: 3.05rem;
  }

  .product-visual {
    height: 560px;
    min-height: 0;
  }

  .intro-layout,
  .knowledge-layout,
  .workflow-layout,
  .trust-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .level-grid,
  .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sticky-heading {
    position: static;
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 64px;
    padding: 0 18px;
  }

  .brand span {
    max-width: 136px;
    line-height: 1.2;
  }

  .header-cta {
    padding: 0 12px;
    font-size: 0.84rem;
  }

  .hero {
    padding: 40px 18px 52px;
  }

  h1 {
    font-size: 2.22rem;
  }

  h2 {
    font-size: 1.82rem;
  }

  .hero-text {
    font-size: 1rem;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .level-grid,
  .scene-grid {
    grid-template-columns: 1fr;
  }

  .hero-facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
  }

  .hero-facts div {
    padding: 12px 10px 11px;
  }

  .hero-facts dt {
    font-size: 0.72rem;
  }

  .hero-facts dd {
    font-size: 0.88rem;
    line-height: 1.25;
  }

  .product-visual {
    height: 474px;
    min-height: 474px;
    overflow: hidden;
  }

  .product-visual::before {
    inset: 42px 0 22px;
  }

  .phone-shell {
    width: 258px;
    min-height: 508px;
    transform: translateY(8px);
  }

  .phone-screen {
    min-height: 482px;
    padding: 14px;
  }

  .triage-panel {
    padding: 16px;
  }

  .triage-panel h2 {
    font-size: 1.14rem;
  }

  .guide-list {
    display: none;
  }

  .floating-note {
    width: 128px;
    padding: 11px;
  }

  .floating-note strong {
    font-size: 1.18rem;
  }

  .floating-note span {
    font-size: 0.74rem;
  }

  .note-one {
    top: 20px;
    right: 0;
  }

  .note-two {
    left: 0;
    bottom: 14px;
  }

  .section {
    padding: 66px 18px;
  }

  .level-card,
  .scene-card,
  .trust-grid article,
  .step-list article {
    min-height: auto;
    padding: 20px;
  }

  .step-list article {
    grid-template-columns: 42px 1fr;
    gap: 14px;
  }

  .step-list span {
    width: 42px;
    height: 42px;
  }

  .download-section {
    padding: 24px 18px 54px;
  }

  .download-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 22px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    padding: 28px 18px;
  }
}