:root {
  --ink: #202a24;
  --muted: rgba(32, 42, 36, .7);
  --on-image: rgba(255, 255, 255, .98);
  --on-image-muted: rgba(255, 255, 255, .82);
  --green: #35644a;
  --green-deep: #294f3a;
  --green-soft: #d7eadc;
  --cinnabar: #9f3a2c;
  --gold: #855b2c;
  --border: rgba(62, 74, 66, .2);
  --border-image: rgba(255, 255, 255, .36);
  --display: rgba(252, 249, 241, .18);
  --control: rgba(255, 255, 255, .58);
  --reading: rgba(252, 249, 241, .92);
  --shadow: 0 18px 46px rgba(9, 17, 12, .2);
  --text-shadow: 0 1px 1px rgba(0, 0, 0, .56);
  --radius-panel: 20px;
  --radius-control: 12px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-serif: "Songti SC", "STSong", "SimSun", serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: #4c4032;
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

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

.wallpaper {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(37, 31, 24, .72), rgba(37, 31, 24, .18) 52%, rgba(37, 31, 24, .44)),
    linear-gradient(180deg, rgba(31, 26, 20, .06), rgba(31, 26, 20, .48)),
    url("../assets/home/feature-acupuncture.webp") center / cover no-repeat;
}

.wallpaper::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 72% 28%, rgba(224, 189, 130, .14), transparent 35%),
    linear-gradient(180deg, transparent 36%, rgba(11, 18, 13, .28));
}

.page {
  width: min(1500px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 18px 24px 22px;
}

.glass-display,
.glass-control,
.glass-reading {
  border-radius: var(--radius-panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px) saturate(118%);
  -webkit-backdrop-filter: blur(18px) saturate(118%);
}

.glass-display {
  border: 1px solid var(--border-image);
  background: var(--display);
}

.glass-control {
  border: 1px solid rgba(255, 255, 255, .38);
  background: var(--control);
}

.glass-reading {
  border: 1px solid var(--border);
  background: var(--reading);
}

.on-image {
  color: var(--on-image);
  text-shadow: var(--text-shadow);
}

.topbar {
  min-height: 60px;
  display: grid;
  grid-template-columns: minmax(250px, 1fr) auto minmax(180px, 1fr);
  align-items: center;
  gap: 18px;
  padding: 8px 12px 8px 18px;
}

.brand {
  min-width: 0;
  display: flex;
  align-items: baseline;
  gap: 13px;
}

.brand strong {
  font: 600 18px/1 var(--font-serif);
  letter-spacing: .18em;
  white-space: nowrap;
}

.brand span {
  padding-left: 13px;
  border-left: 1px solid rgba(255, 255, 255, .38);
  color: var(--on-image-muted);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
}

.primary-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border-radius: 13px;
  box-shadow: none;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.primary-nav a {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 7px 14px;
  border-radius: 9px;
  color: var(--ink);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

.primary-nav a:hover,
.primary-nav a:focus-visible {
  background: rgba(255, 255, 255, .58);
}

.primary-nav a.active {
  color: #fff;
  background: var(--green);
}

.back-link {
  justify-self: end;
  padding: 9px 4px;
  font-size: 12px;
}

.hero {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 38px clamp(12px, 4vw, 62px) 28px;
}

.eyebrow,
.panel-kicker {
  display: block;
  margin-bottom: 8px;
  color: var(--green-soft);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .2em;
}

.hero h1 {
  margin: 0 0 12px;
  font: 600 clamp(40px, 5vw, 64px)/1.12 var(--font-serif);
  letter-spacing: .035em;
}

.hero p {
  max-width: 760px;
  margin: 0;
  color: var(--on-image-muted);
  font: 15px/1.8 var(--font-serif);
  letter-spacing: .025em;
}

.training-console {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 350px);
  gap: 18px;
  align-items: stretch;
}

.core-panel,
.support-panel {
  min-width: 0;
  min-height: 500px;
  padding: 20px;
}

.core-panel,
.support-panel {
  color: var(--ink);
}

.core-panel .panel-kicker,
.support-panel .panel-kicker {
  color: var(--green);
  text-shadow: none;
}

.section-heading {
  min-height: 52px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 14px;
}

.section-heading h2 {
  margin: 0;
  font: 600 22px/1.25 var(--font-serif);
  letter-spacing: .07em;
}

.section-note {
  padding: 5px 8px;
  border: 1px solid rgba(53, 100, 74, .28);
  border-radius: 999px;
  color: var(--green);
  font-size: 10px;
  white-space: nowrap;
}

.core-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.core-card {
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgba(53, 100, 74, .18);
  border-radius: 16px;
  background: rgba(255, 255, 255, .46);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.core-image {
  height: 150px;
  display: flex;
  align-items: flex-end;
  padding: 12px;
  background-position: center;
  background-size: cover;
}

.core-image span {
  padding: 5px 8px;
  border: 1px solid rgba(255, 255, 255, .32);
  border-radius: 999px;
  color: #fff;
  background: rgba(15, 22, 17, .44);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: .09em;
  text-shadow: var(--text-shadow);
}

.core-image-acupuncture {
  background-image:
    linear-gradient(180deg, rgba(15, 22, 17, .02), rgba(15, 22, 17, .55)),
    url("../assets/home/feature-acupuncture.webp");
  background-position: 67% center;
}

.core-image-meridian {
  background-image:
    linear-gradient(180deg, rgba(15, 22, 17, .02), rgba(15, 22, 17, .58)),
    url("../assets/tool-entry/liujing-mode-training-v1.webp");
}

.core-image-golden {
  background-image:
    linear-gradient(180deg, rgba(15, 22, 17, .02), rgba(15, 22, 17, .55)),
    url("../assets/home/feature-jingui.webp");
  background-position: center 48%;
}

.core-copy {
  min-height: 220px;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  align-content: start;
  gap: 0 11px;
  padding: 16px;
}

.training-mark,
.support-mark {
  display: grid;
  place-items: center;
  color: #f7f2e8;
  background: var(--green);
  font-family: var(--font-serif);
}

.training-mark {
  width: 38px;
  height: 50px;
  grid-row: 1 / span 2;
  border-radius: 7px 7px 12px 12px;
  font-size: 18px;
}

.core-copy h3,
.support-list h3 {
  margin: 0;
  font: 600 18px/1.3 var(--font-serif);
  letter-spacing: .05em;
}

.core-copy p {
  margin: 7px 0 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.65;
}

.core-copy > strong {
  grid-column: 2;
  align-self: end;
  margin-top: 18px;
  color: var(--green);
  font-size: 11px;
}

.core-card:hover,
.core-card:focus-visible,
.support-list a:hover,
.support-list a:focus-visible {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, .76);
  box-shadow: 0 14px 30px rgba(24, 36, 28, .14);
}

.support-list {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.support-list a {
  min-height: 82px;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 12px;
  align-items: center;
  gap: 11px;
  padding: 12px;
  border: 1px solid rgba(53, 100, 74, .16);
  border-radius: 13px;
  background: rgba(255, 255, 255, .46);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}

.support-mark {
  width: 38px;
  height: 48px;
  border-radius: 7px 7px 12px 12px;
  font-size: 16px;
}

.support-list p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.55;
}

.support-list a > strong {
  color: var(--green);
  font: 24px/1 var(--font-serif);
}

.method-note {
  margin-top: 14px;
  padding: 13px 14px;
  border-left: 3px solid var(--cinnabar);
  background: rgba(159, 58, 44, .065);
}

.method-note > span {
  color: var(--cinnabar);
  font-size: 10px;
  font-weight: 700;
}

.method-note ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin: 8px 0 0;
  padding-left: 18px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 18px 5px 0;
  color: var(--on-image-muted);
  font-size: 11px;
}

.site-footer strong {
  color: var(--on-image);
  font: 600 14px var(--font-serif);
  letter-spacing: .12em;
}

.site-footer p {
  margin: 0;
}

a:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

@media (max-width: 1100px) {
  .topbar {
    grid-template-columns: 1fr auto;
  }

  .primary-nav {
    order: 3;
    grid-column: 1 / -1;
    justify-self: center;
  }

  .training-console {
    grid-template-columns: minmax(0, 1fr);
  }

  .support-panel {
    min-height: 0;
  }

  .support-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 780px) {
  .page {
    padding: 12px 12px 24px;
  }

  .topbar {
    min-height: 56px;
    gap: 8px;
    padding: 8px 10px;
  }

  .brand span,
  .back-link {
    display: none;
  }

  .primary-nav {
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
  }

  .primary-nav a {
    flex: 0 0 auto;
  }

  .hero {
    min-height: 220px;
    padding: 48px 4px 28px;
  }

  .hero h1 {
    font-size: clamp(38px, 12vw, 52px);
  }

  .core-panel,
  .support-panel {
    min-height: 0;
    padding: 17px;
  }

  .core-grid,
  .support-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .core-image {
    height: 170px;
  }

  .core-copy {
    min-height: 175px;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}