:root {
  --paper: #f7f5ee;
  --paper-deep: #ece7da;
  --ink: #17212b;
  --muted: #61707a;
  --line: rgba(23, 33, 43, 0.13);
  --panel: rgba(255, 255, 255, 0.84);
  --ocean: #0b7a75;
  --ocean-dark: #075b57;
  --coral: #dc6a45;
  --gold: #d49b2f;
  --sky: #407db7;
  --shadow: 0 22px 70px rgba(23, 33, 43, 0.12);
  --max: 1160px;
  --side: 288px;
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(11, 122, 117, 0.09) 0 1px, transparent 1px 100%),
    linear-gradient(180deg, rgba(212, 155, 47, 0.08) 0 1px, transparent 1px 100%),
    linear-gradient(135deg, #fbfaf5 0%, var(--paper) 44%, #eef4f1 100%);
  background-size: 36px 36px, 36px 36px, auto;
  line-height: 1.72;
}

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

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

button {
  font: inherit;
}

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(220, 106, 69, 0.42);
  outline-offset: 3px;
}

strong {
  color: var(--ocean-dark);
  font-weight: 850;
}

.cover-stage strong,
.image-led strong,
.download-band strong {
  color: #ffe0a8;
}

.visually-hidden,
.jump-link {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.jump-link:focus {
  z-index: 50;
  top: 16px;
  left: 16px;
  width: auto;
  height: auto;
  padding: 10px 14px;
  margin: 0;
  clip: auto;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.site-shell {
  display: grid;
  grid-template-columns: var(--side) minmax(0, 1fr);
  min-height: 100vh;
}

.side-panel {
  position: sticky;
  top: 0;
  align-self: start;
  display: flex;
  flex-direction: column;
  gap: 28px;
  min-height: 100vh;
  padding: 28px 24px;
  color: #f7f9f4;
  background:
    linear-gradient(180deg, rgba(7, 91, 87, 0.96), rgba(23, 33, 43, 0.98)),
    url("./img/cover.jpg") center/cover no-repeat;
}

.side-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(7, 25, 28, 0.48);
}

.side-panel > * {
  position: relative;
  z-index: 1;
}

.identity {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
}

.identity img {
  width: 58px;
  height: 58px;
  object-fit: cover;
  border-radius: 18px;
  border: 2px solid rgba(255, 255, 255, 0.45);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.22);
}

.identity strong,
.identity small {
  display: block;
}

.identity strong {
  line-height: 1.2;
  font-size: 1.16rem;
}

.identity small {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.82rem;
}

.nav-switch {
  display: none;
}

.side-menu {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.side-menu a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  color: rgba(255, 255, 255, 0.78);
  background: rgba(255, 255, 255, 0.06);
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.side-menu a::after {
  content: ">";
  color: var(--gold);
}

.side-menu a:hover,
.side-menu a:focus-visible {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.14);
  transform: translateX(4px);
}

.panel-download {
  display: grid;
  gap: 14px;
  margin-top: auto;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
}

.panel-download span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
}

.panel-download a,
.primary-action,
.download-band a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 8px;
  color: #fff9ef;
  font-weight: 800;
  background: linear-gradient(135deg, var(--coral), #e88d42);
  box-shadow: 0 14px 32px rgba(220, 106, 69, 0.24);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.panel-download a:hover,
.panel-download a:focus-visible,
.primary-action:hover,
.primary-action:focus-visible,
.download-band a:hover,
.download-band a:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 20px 44px rgba(220, 106, 69, 0.34);
}

.page-flow {
  min-width: 0;
}

.cover-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(260px, 0.45fr);
  align-items: end;
  min-height: 680px;
  padding: 70px clamp(24px, 5vw, 70px);
  overflow: hidden;
  color: #ffffff;
}

.cover-art {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 28, 31, 0.9) 0%, rgba(6, 28, 31, 0.66) 42%, rgba(6, 28, 31, 0.2) 100%),
    linear-gradient(180deg, rgba(6, 28, 31, 0.1) 0%, rgba(6, 28, 31, 0.74) 100%),
    url("./img/cover.jpg") center/cover no-repeat;
  transform: scale(1.01);
}

.cover-stage > *:not(.cover-art) {
  position: relative;
  z-index: 1;
}

.cover-copy {
  max-width: 760px;
}

.label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  color: var(--ocean);
  font-size: 0.92rem;
  font-weight: 800;
  letter-spacing: 0;
}

.cover-stage .label,
.download-band .label {
  color: #ffd98e;
}

.label::before {
  content: "";
  width: 28px;
  height: 2px;
  background: currentColor;
}

.cover-copy h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 4.7rem);
  line-height: 0.88;
}

.cover-copy .lead {
  max-width: 15ch;
  margin: 28px 0 0;
  color: #fff3d7;
  font-size: clamp(1.35rem, 2.6vw, 2.15rem);
  font-weight: 800;
  line-height: 1.25;
}

.cover-copy p:not(.label):not(.lead) {
  max-width: 660px;
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.82);
}

.cover-copy span[lang="en"] {
  color: #ffe0a8;
  font-weight: 800;
}

.cover-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 8px;
  color: #ffffff;
  font-weight: 800;
  background: rgba(255, 255, 255, 0.1);
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.secondary-action:hover,
.secondary-action:focus-visible {
  border-color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-3px);
}

.cover-facts {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.cover-facts li {
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
}

.cover-facts strong,
.cover-facts span {
  display: block;
}

.cover-facts strong {
  color: #ffffff;
  font-size: 1rem;
}

.cover-facts span {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 0.92rem;
}

.chapter,
.image-led,
.download-band,
.page-footer {
  width: min(calc(100% - 48px), var(--max));
  margin: 0 auto;
}

.chapter {
  padding: 82px 0;
}

.chapter-title {
  display: grid;
  grid-template-columns: minmax(180px, 0.35fr) minmax(0, 0.65fr);
  gap: 28px;
  align-items: end;
  margin-bottom: 34px;
  border-bottom: 1px solid var(--line);
}

.chapter-title h2,
.image-led h2,
.wide-story h2,
.download-band h2 {
  margin: 0;
  font-size: clamp(1.45rem, 2.5vw, 2.3rem);
  line-height: 1.12;
}

.editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(340px, 0.72fr);
  gap: 26px;
  align-items: stretch;
}

.text-panel {
  columns: 2 280px;
  column-gap: 30px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 16px 44px rgba(23, 33, 43, 0.06);
}

.text-panel p {
  margin: 0 0 18px;
  break-inside: avoid;
  color: #2d3c45;
}

.feature-shot {
  display: grid;
  grid-template-rows: 1fr auto;
  margin: 0;
  overflow: hidden;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-shot img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.45s ease;
}

figcaption {
  padding: 12px 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.play-matrix {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.play-matrix article {
  position: relative;
  min-height: 270px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.78);
  transition: background 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}

.play-matrix article:nth-child(1),
.play-matrix article:nth-child(4),
.play-matrix article:nth-child(6) {
  background: #ffffff;
}

.play-matrix article:nth-child(7) {
  grid-column: span 2;
  min-height: auto;
  background: linear-gradient(135deg, rgba(11, 122, 117, 0.12), rgba(212, 155, 47, 0.13));
}

.play-matrix span {
  display: block;
  color: var(--coral);
  font-weight: 900;
}

.play-matrix h3 {
  margin: 16px 0 10px;
  font-size: 1.18rem;
  line-height: 1.3;
}

.play-matrix p {
  margin: 0;
  color: var(--muted);
}

.image-led {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.58fr);
  gap: 0;
  align-items: stretch;
  overflow: hidden;
  border-radius: 8px;
  background: #14252b;
  color: #ffffff;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.image-led figure {
  margin: 0;
}

.image-led img {
  width: 100%;
  height: 100%;
  min-height: 410px;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.5s ease;
}

.image-led > div {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(26px, 5vw, 54px);
}

.image-led .label {
  color: #ffd98e;
}

.image-led p:not(.label) {
  margin: 20px 0 0;
  color: rgba(255, 255, 255, 0.76);
}

.wide-story {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(280px, 0.45fr);
  align-items: stretch;
  overflow: hidden;
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 16px 46px rgba(23, 33, 43, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.wide-story figure {
  margin: 0;
}

.wide-story img {
  width: 100%;
  height: 100%;
  min-height: 380px;
  object-fit: cover;
  transition: transform 0.5s ease, filter 0.5s ease;
}

.wide-story article {
  padding: clamp(26px, 4vw, 48px);
}

.wide-story p:not(.label) {
  color: var(--muted);
}

.split-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.split-gallery figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease;
}

.split-gallery img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.45s ease, filter 0.45s ease;
}

.route-board {
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(64, 125, 183, 0.12), transparent 52%),
    #ffffff;
  box-shadow: 0 18px 50px rgba(23, 33, 43, 0.08);
}

.route-board ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: route;
}

.route-board li {
  counter-increment: route;
  position: relative;
  min-height: 128px;
  padding: 24px 24px 24px 82px;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  transition: background 0.2s ease, color 0.2s ease;
}

.route-board li:nth-child(odd) {
  border-right: 1px solid var(--line);
}

.route-board li::before {
  content: counter(route, decimal-leading-zero);
  position: absolute;
  left: 24px;
  top: 24px;
  color: var(--sky);
  font-size: 1.42rem;
  font-weight: 900;
}

.route-board span {
  display: block;
  margin-bottom: 5px;
  color: var(--ink);
  font-weight: 850;
}

.release-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.release-list article {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 230px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  transition: border-color 0.22s ease, box-shadow 0.22s ease, transform 0.22s ease, background 0.22s ease;
}

.release-list time {
  color: var(--coral);
  font-weight: 850;
}

.release-list h3 {
  margin: 0;
  font-size: 1.12rem;
}

.release-list p {
  margin: 0;
  color: var(--muted);
}

.download-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  margin-top: 18px;
  padding: clamp(28px, 5vw, 52px);
  border-radius: 8px;
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(7, 91, 87, 0.96), rgba(23, 33, 43, 0.94)),
    url("./img/tu1.webp") center/cover no-repeat;
  box-shadow: var(--shadow);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.download-band p:not(.label) {
  max-width: 760px;
  color: rgba(255, 255, 255, 0.76);
}

.accordion-list {
  display: grid;
  gap: 12px;
}

.accordion-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.86);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.accordion-list summary {
  cursor: pointer;
  padding: 18px 20px;
  color: var(--ink);
  font-weight: 850;
  transition: color 0.2s ease, background 0.2s ease;
}

.accordion-list p {
  margin: 0;
  padding: 0 20px 20px;
  color: var(--muted);
}

.page-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 34px 0 46px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (hover: hover) {
  .identity:hover img {
    transform: rotate(-3deg) scale(1.04);
  }

  .identity img {
    transition: transform 0.24s ease, box-shadow 0.24s ease;
  }

  .feature-shot:hover,
  .wide-story:hover,
  .image-led:hover,
  .download-band:hover {
    transform: translateY(-5px);
    box-shadow: 0 28px 78px rgba(23, 33, 43, 0.16);
  }

  .feature-shot:hover img,
  .wide-story:hover img,
  .image-led:hover img,
  .split-gallery figure:hover img {
    transform: scale(1.045);
    filter: saturate(1.08) contrast(1.03);
  }

  .play-matrix article:hover {
    z-index: 2;
    background: #ffffff;
    transform: translateY(-4px);
    box-shadow: 0 18px 42px rgba(23, 33, 43, 0.12);
  }

  .play-matrix article:hover span {
    color: var(--ocean);
  }

  .split-gallery figure:hover,
  .release-list article:hover {
    border-color: rgba(11, 122, 117, 0.32);
    transform: translateY(-4px);
    box-shadow: 0 18px 46px rgba(23, 33, 43, 0.12);
    background: #ffffff;
  }

  .route-board li:hover {
    color: #3c4a52;
    background: rgba(11, 122, 117, 0.07);
  }

  .route-board li:hover::before {
    color: var(--coral);
  }

  .accordion-list details:hover {
    border-color: rgba(11, 122, 117, 0.3);
    background: #ffffff;
    box-shadow: 0 14px 36px rgba(23, 33, 43, 0.08);
  }

  .accordion-list summary:hover {
    color: var(--ocean-dark);
    background: rgba(11, 122, 117, 0.06);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 1180px) {
  .site-shell {
    display: block;
  }

  .side-panel {
    position: sticky;
    z-index: 30;
    min-height: auto;
    padding: 14px 18px;
    flex-direction: row;
    align-items: center;
    background:
      linear-gradient(135deg, rgba(7, 91, 87, 0.98), rgba(23, 33, 43, 0.98)),
      url("./img/cover.jpg") center/cover no-repeat;
  }

  .identity {
    grid-template-columns: 46px minmax(0, 1fr);
  }

  .identity img {
    width: 46px;
    height: 46px;
    border-radius: 12px;
  }

  .side-menu {
    display: flex;
    gap: 8px;
    margin: 0 0 0 auto;
  }

  .side-menu a {
    min-height: 38px;
    padding: 0 12px;
  }

  .side-menu a::after,
  .panel-download {
    display: none;
  }
}

@media (max-width: 860px) {
  .side-panel {
    flex-wrap: wrap;
  }

  .nav-switch {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    width: 42px;
    height: 42px;
    margin-left: auto;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 0;
  }

  .nav-switch span:not(.visually-hidden) {
    width: 18px;
    height: 2px;
    border-radius: 99px;
    background: #ffffff;
    transition: transform 0.22s ease, opacity 0.18s ease;
  }

  .nav-switch.is-active span:not(.visually-hidden):nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-switch.is-active span:not(.visually-hidden):nth-child(2) {
    opacity: 0;
  }

  .nav-switch.is-active span:not(.visually-hidden):nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .side-menu {
    display: none;
    width: 100%;
    margin: 4px 0 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .side-menu.is-open {
    display: grid;
  }

  .cover-stage,
  .editorial-grid,
  .image-led,
  .wide-story,
  .download-band {
    grid-template-columns: 1fr;
  }

  .cover-stage {
    min-height: auto;
    padding: 92px 24px 30px;
  }

  .cover-facts {
    margin-top: 34px;
  }

  .chapter,
  .image-led,
  .download-band,
  .page-footer {
    width: min(calc(100% - 32px), var(--max));
  }

  .chapter {
    padding: 58px 0;
  }

  .chapter-title {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .text-panel {
    columns: 1;
  }

  .play-matrix,
  .release-list,
  .route-board ol,
  .split-gallery {
    grid-template-columns: 1fr;
  }

  .play-matrix article:nth-child(7) {
    grid-column: span 1;
  }

  .route-board li,
  .route-board li:nth-child(odd) {
    border-right: 0;
  }

  .download-band {
    align-items: start;
  }

  .page-footer {
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .identity small {
    display: none;
  }

  .identity strong {
    font-size: 1rem;
  }

  .cover-copy h1 {
    font-size: 2.2rem;
  }

  .cover-copy .lead {
    max-width: 100%;
  }

  .cover-actions {
    display: grid;
  }

  .primary-action,
  .secondary-action,
  .download-band a {
    width: 100%;
  }

  .feature-shot img,
  .image-led img,
  .wide-story img {
    min-height: 260px;
  }

  .play-matrix article {
    min-height: auto;
  }

  .route-board li {
    padding: 22px 20px 22px 70px;
  }

  .route-board li::before {
    left: 20px;
  }
}