:root {
  --ink: #10151a;
  --muted: #63707d;
  --line: #dfe7ee;
  --paper: #f6f8f6;
  --dark: #071015;
  --teal: #0f9f8a;
  --cyan: #19c7e8;
  --mint: #8ee6cc;
  --amber: #f1ad4e;
  --coral: #e8664f;
  --radius: 8px;
  --shadow: 0 22px 70px rgba(13, 28, 37, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    Inter,
    "PingFang SC",
    "Microsoft YaHei",
    system-ui,
    sans-serif;
  letter-spacing: 0;
}

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

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

.page-shell {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.program-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(7, 16, 21, 0.9);
  color: #fff;
  backdrop-filter: blur(20px);
}

.program-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.brand-mark {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(25, 199, 232, 0.32), rgba(241, 173, 78, 0.24));
  color: #fff;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand small {
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 12px;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.nav-links a {
  padding: 9px 11px;
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
  font-weight: 800;
}

.nav-links a:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.program-hero {
  position: relative;
  min-height: 640px;
  overflow: hidden;
  background: var(--dark);
  color: #fff;
}

.program-hero > img {
  position: absolute;
  inset: 0;
  height: 100%;
  object-fit: cover;
}

.program-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 16, 21, 0.94) 0%, rgba(7, 16, 21, 0.68) 46%, rgba(7, 16, 21, 0.1) 100%),
    radial-gradient(circle at 82% 20%, rgba(25, 199, 232, 0.28), transparent 32%);
  z-index: 1;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 0.46fr);
  gap: 34px;
  align-items: end;
  min-height: 640px;
  padding: 86px 0 56px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--mint);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

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

h1 {
  max-width: 8.6em;
  margin-bottom: 16px;
  font-size: clamp(46px, 7vw, 88px);
  line-height: 0.96;
}

h2 {
  max-width: 900px;
  margin-bottom: 16px;
  font-size: clamp(32px, 4.6vw, 58px);
  line-height: 1.05;
}

h3 {
  margin-bottom: 12px;
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.14;
}

.hero-copy > p:not(.eyebrow),
.section-lede {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
  line-height: 1.85;
}

.hero-tags,
.chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.hero-tags {
  margin-top: 24px;
}

.hero-tags span,
.chip-list span {
  padding: 8px 11px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}

.hero-tags span {
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
}

.formula-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.formula-strip span {
  display: inline-grid;
  min-width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(25, 199, 232, 0.24), rgba(241, 173, 78, 0.16));
  color: #fff;
  font-size: 16px;
  font-weight: 900;
}

.hero-panel {
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(7, 16, 21, 0.68);
  backdrop-filter: blur(18px);
}

.hero-panel-grid {
  display: grid;
  gap: 12px;
}

.hero-panel-grid div {
  padding: 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.hero-panel strong,
.hero-panel span {
  display: block;
}

.hero-panel strong {
  color: var(--mint);
  font-size: 13px;
}

.hero-panel span {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.78);
  line-height: 1.55;
}

.section {
  padding: 88px 0;
}

.section-soft {
  background:
    radial-gradient(circle at 12% 10%, rgba(25, 199, 232, 0.1), transparent 28%),
    linear-gradient(180deg, #ffffff 0%, #eef6f3 100%);
}

.section-dark {
  background:
    radial-gradient(circle at 78% 24%, rgba(25, 199, 232, 0.12), transparent 28%),
    linear-gradient(135deg, #071015, #0c2527 58%, #211c13);
  color: #fff;
}

.section .section-lede {
  color: var(--muted);
}

.section-dark .section-lede {
  color: rgba(255, 255, 255, 0.72);
}

.topic-index {
  display: grid;
  grid-template-columns: minmax(220px, 0.28fr) 1fr;
  gap: 24px;
  align-items: center;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 16px 46px rgba(13, 28, 37, 0.07);
}

.topic-index h2 {
  margin: 0;
  font-size: 28px;
}

.topic-index nav {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.topic-index a {
  padding: 9px 12px;
  border: 1px solid rgba(15, 159, 138, 0.18);
  border-radius: 999px;
  background: #f7fbf9;
  color: #174138;
  font-size: 13px;
  font-weight: 900;
}

.visual-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.42fr);
  min-height: 280px;
  margin: 22px 0;
  overflow: hidden;
  border-radius: 8px;
  background: #071015;
  color: #fff;
  box-shadow: var(--shadow);
}

.visual-band img {
  height: 100%;
  min-height: 280px;
  object-fit: cover;
}

.visual-band figcaption {
  display: grid;
  align-content: end;
  gap: 10px;
  padding: 24px;
  background: linear-gradient(135deg, rgba(15, 159, 138, 0.2), rgba(7, 16, 21, 0.94));
}

.visual-band strong {
  font-size: clamp(22px, 2.4vw, 34px);
  line-height: 1.12;
}

.visual-band span {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.75;
}

.grid-3,
.grid-4 {
  display: grid;
  gap: 16px;
}

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

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

.info-card,
.route-card,
.module-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 16px 42px rgba(13, 28, 37, 0.07);
}

.info-card,
.route-card,
.module-card {
  padding: 22px;
}

.info-card > span,
.route-card > span,
.module-card > span {
  display: inline-grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 8px;
  background: #e7f8f5;
  color: #063d35;
  font-weight: 900;
}

.info-card p,
.route-card p,
.module-card p,
.module-card li {
  color: var(--muted);
  line-height: 1.75;
}

.module-card ul {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding-left: 18px;
}

.section-dark .info-card,
.section-dark .route-card,
.section-dark .module-card {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  box-shadow: none;
}

.section-dark .info-card p,
.section-dark .route-card p,
.section-dark .module-card p,
.section-dark .module-card li {
  color: rgba(255, 255, 255, 0.72);
}

.data-table-wrap {
  margin-top: 18px;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 16px 42px rgba(13, 28, 37, 0.07);
}

.data-table {
  width: 100%;
  min-width: 840px;
  border-collapse: collapse;
}

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

.data-table th {
  background: #071015;
  color: #fff;
  font-size: 13px;
}

.data-table td {
  color: var(--muted);
  line-height: 1.65;
}

.data-table td:first-child {
  color: #142128;
  font-weight: 900;
}

.source-list {
  display: grid;
  gap: 10px;
  margin: 20px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.7;
}

.source-list a {
  color: #0b7668;
  font-weight: 800;
}

.program-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  width: 100%;
  height: 3px;
  transform: scaleX(0);
  transform-origin: left center;
  background: linear-gradient(90deg, var(--cyan), var(--amber), var(--coral));
  box-shadow: 0 0 22px rgba(25, 199, 232, 0.6);
}

.hero-copy h1,
.art-title {
  font-family:
    "Arial Black",
    "PingFang SC",
    "Microsoft YaHei",
    system-ui,
    sans-serif;
  letter-spacing: 0;
}

.hero-copy h1 {
  text-shadow:
    0 0 28px rgba(25, 199, 232, 0.22),
    0 16px 48px rgba(0, 0, 0, 0.28);
}

.art-title {
  display: inline-grid;
  margin: 0 0 18px;
  color: transparent;
  font-size: clamp(38px, 6vw, 76px);
  line-height: 0.95;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.72);
  background: linear-gradient(110deg, #fff 0%, #8ee6cc 32%, #19c7e8 68%, #f1ad4e 100%);
  background-clip: text;
  -webkit-background-clip: text;
  filter: drop-shadow(0 18px 34px rgba(0, 0, 0, 0.34));
}

.program-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(90deg, #000 0%, transparent 66%);
}

.hero-kicker-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.hero-kicker-grid span {
  min-height: 78px;
  padding: 13px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.78);
  font-size: 12px;
  font-weight: 800;
  line-height: 1.45;
}

.hero-kicker-grid strong {
  display: block;
  margin-bottom: 5px;
  color: #fff;
  font-size: 18px;
  line-height: 1;
}

.visual-mosaic {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-auto-rows: 250px;
  gap: 16px;
  margin-top: 22px;
}

.mosaic-card {
  position: relative;
  min-height: 220px;
  overflow: hidden;
  border-radius: 8px;
  background: #071015;
  box-shadow: var(--shadow);
}

.mosaic-card.large {
  grid-row: span 2;
}

.mosaic-card img {
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.mosaic-card:hover img {
  transform: scale(1.045);
}

.caption-chip {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  display: grid;
  gap: 4px;
  padding: 13px 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(7, 16, 21, 0.74);
  color: #fff;
  backdrop-filter: blur(14px);
}

.caption-chip strong {
  font-size: 16px;
}

.caption-chip span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  line-height: 1.45;
}

.story-switcher {
  display: grid;
  grid-template-columns: minmax(220px, 0.32fr) minmax(0, 1fr);
  gap: 18px;
  margin-top: 24px;
}

.story-tabs {
  display: grid;
  gap: 10px;
  align-content: start;
}

.story-tabs button {
  width: 100%;
  min-height: 58px;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: #24313a;
  font: inherit;
  font-weight: 900;
  text-align: left;
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    background 0.2s ease,
    color 0.2s ease,
    transform 0.2s ease;
}

.story-tabs button:hover,
.story-tabs button.is-active {
  border-color: rgba(25, 199, 232, 0.44);
  background: #071015;
  color: #fff;
  transform: translateX(4px);
}

.story-panels {
  position: relative;
  min-height: 360px;
}

.story-panel {
  display: none;
  height: 100%;
  min-height: 360px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.story-panel.is-active {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(280px, 0.65fr);
}

.story-copy {
  padding: 28px;
}

.story-copy h3 {
  margin-bottom: 10px;
}

.story-copy p,
.story-copy li {
  color: var(--muted);
  line-height: 1.75;
}

.story-copy ul {
  display: grid;
  gap: 8px;
  margin: 14px 0 0;
  padding-left: 18px;
}

.story-visual {
  min-height: 100%;
  background: #071015;
}

.story-visual img {
  height: 100%;
  object-fit: cover;
}

.section-dark .story-tabs button {
  border-color: rgba(255, 255, 255, 0.14);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.76);
}

.section-dark .story-tabs button:hover,
.section-dark .story-tabs button.is-active {
  background: #fff;
  color: #071015;
}

.section-dark .story-panel {
  border-color: rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.section-dark .story-copy p,
.section-dark .story-copy li {
  color: rgba(255, 255, 255, 0.72);
}

.step-lane {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.step-node {
  position: relative;
  min-height: 190px;
  padding: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(255, 255, 255, 0.76)),
    radial-gradient(circle at top right, rgba(25, 199, 232, 0.2), transparent 40%);
  box-shadow: 0 16px 42px rgba(13, 28, 37, 0.07);
}

.step-node::after {
  content: attr(data-step);
  position: absolute;
  right: 14px;
  bottom: -10px;
  color: rgba(15, 159, 138, 0.1);
  font-size: 82px;
  font-weight: 1000;
  line-height: 1;
}

.step-node strong {
  display: block;
  margin-bottom: 12px;
  color: #071015;
  font-size: 22px;
}

.step-node p {
  color: var(--muted);
  line-height: 1.7;
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.metric-strip div {
  min-height: 120px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(25, 199, 232, 0.16), rgba(255, 255, 255, 0.07)),
    rgba(255, 255, 255, 0.06);
}

.metric-strip strong {
  display: block;
  color: #fff;
  font-size: 30px;
}

.metric-strip span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.5;
}

.image-caption-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 18px;
  align-items: stretch;
  margin-top: 22px;
}

.image-caption-grid figure {
  margin: 0;
}

.image-caption-grid img {
  height: 100%;
  min-height: 420px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.signal-board {
  display: grid;
  gap: 12px;
}

.signal-item {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.signal-item strong {
  display: block;
  margin-bottom: 8px;
  color: #071015;
  font-size: 18px;
}

.signal-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.magnetic-card {
  transform: perspective(1000px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transition: transform 0.16s ease, box-shadow 0.2s ease;
}

.magnetic-card:hover {
  box-shadow: 0 22px 70px rgba(13, 28, 37, 0.16);
}

.program-cta-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-top: 28px;
  padding: 22px;
  border-radius: 8px;
  background: #071015;
  color: #fff;
}

.program-cta-band p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
}

.program-cta-band a {
  padding: 12px 16px;
  border-radius: 8px;
  background: #fff;
  color: #071015;
  font-weight: 900;
  white-space: nowrap;
}

.program-footer {
  padding: 30px 0;
  background: #071015;
  color: #fff;
}

.program-footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.program-footer p {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.68);
}

.program-footer a {
  padding: 12px 16px;
  border-radius: 8px;
  background: #fff;
  color: #071015;
  font-weight: 900;
}

@media (max-width: 980px) {
  .program-nav,
  .hero-inner,
  .topic-index,
  .visual-band,
  .visual-mosaic,
  .story-switcher,
  .story-panel.is-active,
  .step-lane,
  .metric-strip,
  .image-caption-grid,
  .program-cta-band,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }

  .mosaic-card.large {
    grid-row: span 1;
  }

  .program-nav {
    align-items: flex-start;
    padding: 14px 0;
  }

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

@media (max-width: 680px) {
  .page-shell {
    width: min(100% - 28px, 1180px);
  }

  .brand small {
    display: none;
  }

  .program-hero,
  .hero-inner {
    min-height: 640px;
  }

  .hero-inner {
    padding: 50px 0 34px;
  }

  .hero-panel {
    display: none;
  }

  .hero-kicker-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(40px, 12vw, 56px);
  }

  .section {
    padding: 62px 0;
  }

  .visual-band figcaption {
    padding: 18px;
  }

  .visual-mosaic {
    grid-auto-rows: 220px;
  }

  .story-copy {
    padding: 20px;
  }

  .story-panel,
  .story-panel.is-active {
    min-height: 0;
  }

  .story-visual {
    min-height: 220px;
  }

  .image-caption-grid img {
    min-height: 260px;
  }

  .program-footer-inner {
    display: grid;
  }

  .program-footer a {
    text-align: center;
  }
}