@import url("https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@400;500;700;900&display=swap");

:root {
  --bg: #f7f2ec;
  --bg-soft: #fbf8f4;
  --surface: rgba(255, 252, 247, 0.78);
  --surface-strong: rgba(255, 252, 247, 0.94);
  --line: rgba(189, 156, 120, 0.2);
  --line-strong: rgba(189, 156, 120, 0.42);
  --text: #3d332d;
  --text-soft: rgba(61, 51, 45, 0.74);
  --accent: #b79067;
  --accent-soft: rgba(183, 144, 103, 0.12);
  --shadow: 0 28px 72px rgba(100, 79, 62, 0.08);
  --radius: 30px;
  --max-width: 1380px;
  --font-main: "Noto Serif SC", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-main);
  color: var(--text);
  background:
    radial-gradient(circle at left top, rgba(255, 255, 255, 0.85), transparent 28%),
    radial-gradient(circle at right top, rgba(245, 228, 218, 0.56), transparent 22%),
    linear-gradient(180deg, #faf6f1 0%, #f4ede6 54%, #f8f4ef 100%);
}

a,
button,
input,
textarea,
select {
  font: inherit;
}

button {
  border: 0;
}

.page-shell {
  width: min(calc(100% - 40px), var(--max-width));
  margin: 0 auto;
  padding-bottom: 36px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 24px 0 16px;
}

.topbar__brand {
  color: var(--accent);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.topbar__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.topbar__nav a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 13px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid transparent;
}

.topbar__nav a:hover,
.topbar__nav a:focus-visible {
  outline: none;
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.46);
}

.screen {
  position: relative;
  margin-bottom: 22px;
  padding: 56px 40px;
  border-radius: 36px;
  border: 1px solid rgba(255, 255, 255, 0.58);
  background: linear-gradient(180deg, rgba(255, 252, 247, 0.74), rgba(255, 250, 245, 0.58));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.screen::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.18), transparent 24%);
  pointer-events: none;
}

.screen--hero {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(420px, 0.95fr);
  align-items: center;
  min-height: calc(100svh - 84px);
  gap: 24px;
}

.screen__copy,
.screen__heading,
.detail-panel,
.result-panel,
.pilot-strip,
.closing-block {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  letter-spacing: 0;
}

.screen--hero h1 {
  font-size: clamp(30px, 3.5vw, 54px);
  line-height: 1.22;
  max-width: 12em;
}

.lead,
.sublead,
.screen__heading p,
.detail-panel p,
.result-panel p,
.ai-role-card p,
.landing-card p,
.pilot-card p {
  color: var(--text-soft);
  line-height: 1.9;
}

.lead {
  margin: 26px 0 0;
  max-width: 34rem;
  font-size: 17px;
}

.sublead {
  margin: 16px 0 0;
  max-width: 30rem;
  font-size: 15px;
}

.hero-rose {
  position: relative;
  width: min(480px, 82%);
  margin: 0 auto;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
}

.hero-rose__ring,
.hero-rose__glow {
  position: absolute;
  border-radius: 999px;
}

.hero-rose__ring--outer {
  inset: 0;
  border: 1px solid rgba(189, 156, 120, 0.18);
}

.hero-rose__ring--inner {
  inset: 14%;
  border: 1px solid rgba(189, 156, 120, 0.14);
}

.hero-rose__glow {
  inset: 8%;
  background: radial-gradient(circle, rgba(255, 246, 238, 0.95) 0%, rgba(244, 225, 214, 0.36) 42%, transparent 74%);
  filter: blur(14px);
}

.hero-rose img {
  position: relative;
  z-index: 1;
  width: 72%;
  border-radius: 999px;
  filter: saturate(0.94) brightness(1.02);
}

.screen__heading {
  max-width: 860px;
  margin-bottom: 30px;
}

.screen__heading h2 {
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.32;
}

.screen__heading p {
  margin: 16px 0 0;
  max-width: 52rem;
  font-size: 16px;
}

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

.branch-card,
.result-card {
  text-align: left;
  padding: 22px 20px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 252, 248, 0.66);
  color: var(--text);
  cursor: pointer;
  transition: border-color 180ms ease, transform 180ms ease, background-color 180ms ease;
}

.result-card {
  text-decoration: none;
}

.branch-card:hover,
.branch-card:focus-visible,
.branch-card.is-active,
.result-card:hover,
.result-card:focus-visible,
.result-card.is-active {
  outline: none;
  transform: translateY(-2px);
  border-color: var(--line-strong);
  background: rgba(255, 252, 248, 0.94);
}

.branch-card__index {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.14em;
}

.branch-card strong,
.result-card strong {
  display: block;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.45;
}

.branch-card em,
.result-card span {
  display: block;
  margin-top: 10px;
  font-style: normal;
  color: var(--text-soft);
  font-size: 14px;
  line-height: 1.75;
}

.detail-panel,
.result-panel {
  margin-top: 18px;
  padding: 28px 26px;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  background: var(--surface-strong);
}

.detail-panel__label,
.detail-panel__meta-label {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.detail-panel h3,
.result-panel h3 {
  font-size: 32px;
  line-height: 1.34;
}

.detail-panel > p,
.result-panel > p {
  margin: 14px 0 0;
  font-size: 16px;
}

.detail-panel__meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 22px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.detail-panel__next {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.detail-panel__action,
.closing-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 14px;
  padding: 11px 15px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 252, 248, 0.9);
  color: #8a6340;
  text-decoration: none;
  line-height: 1.4;
  transition: border-color 180ms ease, background-color 180ms ease, transform 180ms ease;
}

.detail-panel__action:hover,
.detail-panel__action:focus-visible,
.closing-action:hover,
.closing-action:focus-visible {
  outline: none;
  transform: translateY(-1px);
  border-color: var(--line-strong);
  background: #fffdfa;
}

.result-panel__cta {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.result-files {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.result-file {
  display: block;
  padding: 12px 14px;
  border-radius: 16px;
  background: var(--bg-soft);
  border: 1px solid rgba(189, 156, 120, 0.16);
  color: #8a6340;
  text-decoration: none;
  line-height: 1.7;
  transition: border-color 180ms ease, background-color 180ms ease;
}

.result-file:hover,
.result-file:focus-visible {
  outline: none;
  border-color: var(--line-strong);
  background: rgba(255, 252, 248, 0.98);
}

/* V2.2：保留原有轻卡片逻辑，适配第三屏横向五卡 */
.ai-role-grid,
.landing-grid {
  display: grid;
  gap: 16px;
}

.ai-role-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

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

.ai-role-card,
.landing-card {
  padding: 22px 20px 24px;
  border-radius: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 252, 248, 0.66);
}

.ai-role-card span {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.ai-role-card h3,
.landing-card h3 {
  font-size: 22px;
  line-height: 1.45;
}

.ai-role-card p,
.landing-card p {
  margin: 12px 0 0;
  font-size: 14px;
}

/* V2.2：新增优先试点轻量区 */
.pilot-strip {
  margin-top: 22px;
  padding: 26px 24px 24px;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.62);
  background: var(--surface-strong);
}

.pilot-strip__heading {
  max-width: 760px;
  margin-bottom: 18px;
}

.pilot-strip__heading h3 {
  font-size: 26px;
  line-height: 1.4;
}

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

.pilot-card {
  padding: 20px 18px;
  border-radius: 22px;
  border: 1px solid var(--line);
  background: rgba(255, 252, 248, 0.72);
}

.pilot-card h4 {
  margin: 0;
  font-size: 20px;
  line-height: 1.45;
  font-weight: 700;
}

.pilot-card p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
}

/* V2.2：新增轻收尾区 */
.screen--closing {
  padding-top: 42px;
  padding-bottom: 42px;
}

.closing-block {
  max-width: 760px;
}

.closing-block h2 {
  font-size: clamp(26px, 2.6vw, 38px);
  line-height: 1.36;
}

.closing-block p {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.closing-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

@media (max-width: 1180px) {
  .screen--hero,
  .detail-panel__meta {
    grid-template-columns: 1fr 1fr;
  }

  .branch-grid,
  .result-grid,
  .ai-role-grid,
  .landing-grid,
  .pilot-strip__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 820px) {
  .page-shell {
    width: min(calc(100% - 20px), var(--max-width));
  }

  .topbar {
    flex-direction: column;
    align-items: flex-start;
  }

  .screen {
    padding: 28px 18px;
    border-radius: 28px;
  }

  .screen--hero,
  .branch-grid,
  .result-grid,
  .detail-panel__meta,
  .ai-role-grid,
  .landing-grid,
  .pilot-strip__grid {
    grid-template-columns: 1fr;
  }

  .screen--hero {
    min-height: auto;
    gap: 22px;
  }

  .screen--hero h1 {
    font-size: 34px;
    max-width: none;
  }

  .hero-rose {
    width: min(360px, 88%);
  }

  .detail-panel h3,
  .result-panel h3,
  .branch-card strong,
  .result-card strong,
  .ai-role-card h3,
  .landing-card h3,
  .pilot-card h4 {
    font-size: 22px;
  }
}