:root {
  --ink: #141518;
  --ink-soft: #26272b;
  --paper: #f7f3e8;
  --milk: #fffdf6;
  --mint: #85f2cf;
  --cyan: #78d8ff;
  --sun: #ffb84d;
  --coral: #ff6b4a;
  --violet: #9d89ff;
  --leaf: #47a66a;
  --line: rgba(20, 21, 24, 0.18);
  --shadow: 0 26px 80px rgba(20, 21, 24, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background:
    linear-gradient(90deg, rgba(20, 21, 24, 0.04) 1px, transparent 1px) 0 0 / 42px 42px,
    linear-gradient(0deg, rgba(20, 21, 24, 0.04) 1px, transparent 1px) 0 0 / 42px 42px,
    var(--paper);
}

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

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

button {
  cursor: pointer;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 16px;
  left: 50%;
  display: flex;
  width: min(1180px, calc(100% - 28px));
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 8px 12px;
  background: rgba(255, 253, 246, 0.82);
  border: 1px solid rgba(20, 21, 24, 0.12);
  border-radius: 16px;
  box-shadow: 0 16px 50px rgba(20, 21, 24, 0.12);
  backdrop-filter: blur(18px);
  transform: translateX(-50%);
}

.logo,
.site-header nav {
  display: flex;
  align-items: center;
}

.logo {
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}

.logo span {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  color: var(--ink);
  font-weight: 950;
  background: linear-gradient(135deg, var(--sun), var(--mint));
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.logo strong {
  font-size: 15px;
  white-space: nowrap;
}

.site-header nav {
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-header nav a {
  min-height: 38px;
  padding: 9px 12px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 800;
  text-decoration: none;
  border-radius: 999px;
}

.site-header nav a:hover {
  background: var(--ink);
  color: var(--milk);
}

.hero-section {
  position: relative;
  min-height: 88vh;
  overflow: hidden;
  color: var(--milk);
  background:
    radial-gradient(circle at 80% 18%, rgba(255, 184, 77, 0.42), transparent 24%),
    radial-gradient(circle at 16% 78%, rgba(133, 242, 207, 0.24), transparent 28%),
    linear-gradient(135deg, #101114 0%, #202024 52%, #3c2520 100%);
}

.hero-scene {
  position: absolute;
  inset: 0;
}

.hero-scene canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  width: min(1180px, calc(100% - 36px));
  min-height: 88vh;
  margin: 0 auto;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, 0.72fr);
  gap: 36px;
  align-items: end;
  padding: 118px 0 58px;
}

.hero-copy h1,
.section-title h2 {
  margin: 0;
  letter-spacing: 0;
}

.hero-copy h1 {
  max-width: 820px;
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(46px, 7vw, 96px);
  line-height: 0.98;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--mint);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-lead {
  max-width: 760px;
  margin: 22px 0 0;
  color: rgba(255, 253, 246, 0.82);
  font-size: 18px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.primary-action,
.secondary-action,
.planner-controls button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  color: var(--ink);
  font-weight: 900;
  text-decoration: none;
  background: var(--sun);
  border: 2px solid var(--ink);
  border-radius: 999px;
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.secondary-action {
  color: var(--milk);
  background: rgba(255, 253, 246, 0.1);
  border-color: rgba(255, 253, 246, 0.45);
  box-shadow: none;
}

.primary-action:hover,
.planner-controls button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}

.secondary-action:hover {
  background: rgba(255, 253, 246, 0.2);
}

.hero-console {
  display: grid;
  gap: 12px;
  align-self: end;
  padding-bottom: 8px;
}

.console-row {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 14px;
  background: rgba(255, 253, 246, 0.1);
  border: 1px solid rgba(255, 253, 246, 0.18);
  border-radius: 14px;
  backdrop-filter: blur(10px);
}

.console-row span {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--ink);
  font-weight: 950;
  background: var(--mint);
  border-radius: 50%;
}

.console-row p {
  margin: 0;
  color: rgba(255, 253, 246, 0.82);
  line-height: 1.6;
}

.quick-strip {
  display: grid;
  width: min(1180px, calc(100% - 36px));
  margin: -28px auto 0;
  position: relative;
  z-index: 5;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  overflow: hidden;
  background: var(--milk);
  border: 2px solid var(--ink);
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.quick-strip div {
  padding: 22px;
  border-right: 1px solid var(--line);
}

.quick-strip div:last-child {
  border-right: 0;
}

.quick-strip strong {
  display: block;
  font-size: 36px;
  line-height: 1;
}

.quick-strip span {
  display: block;
  margin-top: 8px;
  color: #5a5b61;
  font-weight: 700;
}

.content-band,
.planner-section,
.reset-section,
.score-section,
.source-section {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: 88px 0 0;
}

.section-title {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(260px, 0.55fr);
  gap: 36px;
  align-items: end;
  margin-bottom: 28px;
}

.section-title h2 {
  grid-column: 1;
  font-family: Georgia, "Songti SC", serif;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.04;
}

.section-title .eyebrow {
  grid-column: 1 / -1;
  color: var(--coral);
}

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

.benefit-grid article,
.diagnosis-grid article,
.mechanism-card,
.protocol-columns article,
.myth-list article,
.planner-controls,
.time-board,
.day-detail,
.score-meter,
.checklist,
.source-section {
  background: rgba(255, 253, 246, 0.86);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 60px rgba(20, 21, 24, 0.08);
}

.benefit-grid article,
.diagnosis-grid article {
  min-height: 230px;
  padding: 22px;
}

.benefit-grid span,
.myth-list span,
.day-card span {
  display: inline-flex;
  min-height: 30px;
  align-items: center;
  padding: 5px 10px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 950;
  background: var(--mint);
  border-radius: 999px;
}

.benefit-grid article:nth-child(2n) span {
  background: var(--sun);
}

.benefit-grid article:nth-child(3n) span {
  background: var(--cyan);
}

h3 {
  margin: 14px 0 0;
  font-size: 24px;
  line-height: 1.18;
}

p {
  letter-spacing: 0;
}

.benefit-grid p,
.diagnosis-grid p,
.mechanism-card p,
.mechanism-card li,
.protocol-columns li,
.myth-list p,
.source-section p,
.source-section li,
.note {
  color: #51535a;
  line-height: 1.75;
}

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

.mechanism-card {
  position: relative;
  overflow: hidden;
  padding: 28px;
}

.mechanism-card::after {
  position: absolute;
  right: -52px;
  bottom: -70px;
  width: 190px;
  height: 190px;
  content: "";
  background:
    repeating-conic-gradient(from 0deg, rgba(255, 184, 77, 0.22) 0deg 12deg, transparent 12deg 26deg);
  border-radius: 50%;
}

.mechanism-index {
  display: grid;
  width: 56px;
  height: 56px;
  place-items: center;
  color: var(--milk);
  font-size: 24px;
  font-weight: 950;
  background: var(--ink);
  border-radius: 16px;
}

.mechanism-card ul,
.protocol-columns ol,
.source-section ul {
  margin: 18px 0 0;
  padding-left: 20px;
}

.planner-section {
  padding-top: 94px;
}

.planner-layout {
  display: grid;
  grid-template-columns: minmax(280px, 0.7fr) minmax(0, 1.3fr);
  gap: 18px;
}

.planner-controls,
.time-board {
  padding: 24px;
}

.planner-controls {
  display: grid;
  gap: 16px;
  align-content: start;
}

.planner-controls label {
  display: grid;
  gap: 8px;
  color: var(--ink-soft);
  font-weight: 900;
}

.planner-controls input,
.planner-controls select {
  width: 100%;
  min-height: 48px;
  padding: 0 14px;
  color: var(--ink);
  background: var(--milk);
  border: 2px solid var(--ink);
  border-radius: 14px;
}

.planner-controls button {
  width: 100%;
}

.note {
  margin: 4px 0 0;
  font-size: 14px;
}

.time-board {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 18px;
  background: var(--ink);
  color: var(--milk);
}

.bedtime-output {
  display: grid;
  align-content: center;
  min-height: 240px;
  padding: 20px;
  background: linear-gradient(150deg, var(--sun), var(--coral));
  color: var(--ink);
  border-radius: 16px;
}

.bedtime-output span {
  font-weight: 900;
}

.bedtime-output strong {
  margin-top: 12px;
  font-size: 54px;
  line-height: 1;
}

.night-timeline {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.night-timeline li {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  min-height: 58px;
  padding: 10px 12px;
  background: rgba(255, 253, 246, 0.08);
  border: 1px solid rgba(255, 253, 246, 0.14);
  border-radius: 14px;
}

.night-timeline time {
  color: var(--mint);
  font-weight: 950;
}

.night-timeline strong {
  display: block;
  font-size: 15px;
}

.night-timeline p {
  margin: 3px 0 0;
  color: rgba(255, 253, 246, 0.68);
  font-size: 13px;
}

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

.protocol-columns article {
  padding: 26px;
}

.protocol-columns h3,
.diagnosis-grid h3,
.myth-list h3 {
  margin-top: 0;
}

.reset-board {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 10px;
}

.day-card {
  min-height: 128px;
  padding: 14px;
  color: var(--ink);
  text-align: left;
  background: var(--milk);
  border: 1px solid var(--line);
  border-radius: 16px;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease;
}

.day-card strong {
  display: block;
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.35;
}

.day-card:hover,
.day-card.is-active {
  color: var(--milk);
  background: var(--ink);
  transform: translateY(-4px);
}

.day-card.is-active span,
.day-card:hover span {
  background: var(--sun);
}

.day-detail {
  margin-top: 16px;
  padding: 26px;
}

.day-detail h3 {
  margin-top: 0;
}

.day-detail ul {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.day-detail li {
  padding: 14px;
  color: #51535a;
  line-height: 1.6;
  background: #f2ebda;
  border-radius: 14px;
}

.diagnosis-grid article {
  min-height: 190px;
}

.score-layout {
  display: grid;
  grid-template-columns: 340px minmax(0, 1fr);
  gap: 18px;
}

.score-meter,
.checklist {
  padding: 24px;
}

.score-meter {
  display: grid;
  place-items: center;
  text-align: center;
}

.score-ring {
  display: grid;
  width: 220px;
  height: 220px;
  place-items: center;
  align-content: center;
  background:
    conic-gradient(var(--mint) var(--score-angle, 0deg), rgba(20, 21, 24, 0.12) 0),
    var(--milk);
  border: 2px solid var(--ink);
  border-radius: 50%;
}

.score-ring strong {
  font-size: 72px;
  line-height: 0.9;
}

.score-ring span {
  color: #5b5d64;
  font-weight: 900;
}

.score-meter p {
  max-width: 260px;
  color: #51535a;
  line-height: 1.6;
}

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

.checklist button {
  min-height: 82px;
  padding: 14px;
  color: var(--ink);
  font-weight: 900;
  text-align: left;
  background: #f1ecdc;
  border: 1px solid var(--line);
  border-radius: 14px;
}

.checklist button.is-checked {
  color: var(--ink);
  background: var(--mint);
  border-color: var(--ink);
}

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

.myth-list article {
  min-height: 260px;
  padding: 22px;
}

.myth-list span {
  background: var(--coral);
  color: var(--milk);
}

.source-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(300px, 1fr);
  gap: 24px;
  margin-top: 88px;
  margin-bottom: 40px;
  padding: 28px;
}

.source-section .eyebrow {
  color: var(--leaf);
}

.source-section h2 {
  margin: 0;
  font-family: Georgia, "Songti SC", serif;
  font-size: 42px;
}

.source-section a {
  color: var(--ink);
  font-weight: 900;
}

@media (max-width: 1060px) {
  .hero-grid,
  .section-title,
  .planner-layout,
  .time-board,
  .science-layout,
  .protocol-columns,
  .score-layout,
  .source-section {
    grid-template-columns: 1fr;
  }

  .benefit-grid,
  .diagnosis-grid,
  .myth-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .hero-grid {
    align-items: center;
  }
}

@media (max-width: 760px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    flex-direction: column;
  }

  .site-header nav {
    justify-content: flex-start;
  }

  .logo strong {
    white-space: normal;
  }

  .hero-section,
  .hero-grid {
    min-height: 92vh;
  }

  .hero-grid {
    width: min(100% - 24px, 1180px);
    padding-top: 176px;
  }

  .quick-strip,
  .benefit-grid,
  .diagnosis-grid,
  .myth-list,
  .checklist,
  .day-detail ul {
    grid-template-columns: 1fr;
  }

  .quick-strip div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .quick-strip div:last-child {
    border-bottom: 0;
  }

  .content-band,
  .planner-section,
  .reset-section,
  .score-section,
  .source-section,
  .quick-strip {
    width: min(100% - 24px, 1180px);
  }

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

  .night-timeline li {
    grid-template-columns: 1fr;
  }

  .bedtime-output strong {
    font-size: 46px;
  }
}