:root {
  color-scheme: light;
  --void: #19352e;
  --forest: #eef4f1;
  --graphite: #dce8e2;
  --smoke: #62776f;
  --silver: #4c665c;
  --light-text: #19352e;
  --light-muted: rgba(25, 53, 46, 0.7);
  --champagne: #c9a66a;
  --champagne-ink: #8b5e27;
  --champagne-muted: #7b562a;
  --line: rgba(25, 53, 46, 0.18);
  --section-width: 1320px;
  --header-height: 76px;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 0;
  background: var(--forest);
  scroll-behavior: smooth;
  scrollbar-color: var(--champagne-muted) var(--forest);
}

body {
  min-height: 100dvh;
  margin: 0;
  overflow-x: hidden;
  color: var(--light-text);
  background:
    radial-gradient(circle at 72% 18%, rgba(204, 225, 215, 0.92), transparent 34%),
    linear-gradient(145deg, #f8faf8, var(--forest) 54%, #e2eee8);
  font-family:
    "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei",
    "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  position: fixed;
  z-index: 0;
  inset: 0;
  content: "";
  pointer-events: none;
  background-image:
    linear-gradient(rgba(25, 53, 46, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(25, 53, 46, 0.06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 68% 48%, black 5%, transparent 74%);
}

[hidden] {
  display: none !important;
}

a {
  color: inherit;
}

button {
  font: inherit;
}

:where(a, button):focus-visible {
  outline: 2px solid var(--champagne-ink);
  outline-offset: 5px;
}

.particle-field {
  position: fixed;
  z-index: 1;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.skip-link {
  position: fixed;
  z-index: 70;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  border-radius: 999px;
  color: var(--void);
  background: var(--champagne);
  font-weight: 760;
  text-decoration: none;
  transform: translateY(-170%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-frame,
.section-inner {
  width: min(var(--section-width), calc(100% - 96px));
  margin-inline: auto;
}

.site-header-frame {
  position: fixed;
  z-index: 40;
  top: 0;
  right: 0;
  left: 0;
  width: 100%;
  padding: 16px 0;
  color: var(--light-text);
  background: linear-gradient(180deg, rgba(248, 250, 248, 0.94), rgba(248, 250, 248, 0));
}

.site-header-frame::after {
  position: absolute;
  right: max(48px, calc((100% - var(--section-width)) / 2));
  bottom: 0;
  left: max(48px, calc((100% - var(--section-width)) / 2));
  height: 1px;
  content: "";
  background: linear-gradient(90deg, var(--line), transparent 72%);
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 44px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;
  width: 31px;
  height: 31px;
  padding: 7px;
  border: 1px solid rgba(25, 53, 46, 0.64);
  border-radius: 50%;
}

.brand-mark i {
  display: block;
  width: 2px;
  border-radius: 1px;
  background: var(--champagne-ink);
}

.brand-mark i:nth-child(1) {
  height: 7px;
}

.brand-mark i:nth-child(2) {
  height: 14px;
}

.brand-mark i:nth-child(3) {
  height: 10px;
}

.brand-name {
  font-size: 15px;
  font-weight: 760;
  letter-spacing: 0.25em;
}

.locale-switch {
  display: inline-grid;
  grid-auto-flow: column;
  gap: 2px;
  align-items: center;
  padding: 3px;
  border: 1px solid rgba(25, 53, 46, 0.34);
  border-radius: 999px;
  background: rgba(248, 250, 248, 0.78);
  backdrop-filter: blur(14px);
}

.locale-switch button {
  min-width: 39px;
  min-height: 30px;
  padding: 4px 9px;
  border: 0;
  border-radius: 999px;
  color: inherit;
  background: transparent;
  cursor: pointer;
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.04em;
  opacity: 0.58;
  transition:
    opacity 180ms ease,
    color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.locale-switch button:hover {
  opacity: 1;
  transform: translateY(-1px);
}

.locale-switch button.is-active {
  color: var(--void);
  background: var(--champagne);
  opacity: 1;
}

main,
.site-footer {
  position: relative;
  z-index: 2;
}

.page-section {
  position: relative;
  min-width: 0;
  overflow: clip;
  border-top: 1px solid rgba(25, 53, 46, 0.1);
}

.section-hero {
  background:
    radial-gradient(circle at 74% 35%, rgba(215, 228, 244, 0.46), transparent 34%),
    linear-gradient(90deg, rgba(248, 250, 248, 0.96) 0%, rgba(248, 250, 248, 0.86) 38%, rgba(248, 250, 248, 0.18) 72%);
}

.section-workflow {
  overflow: visible;
  background: rgba(238, 244, 241, 0.22);
}

.section-audience {
  background:
    radial-gradient(circle at 72% 50%, rgba(204, 230, 216, 0.72), transparent 34%),
    linear-gradient(90deg, rgba(248, 250, 248, 0.94) 0%, rgba(248, 250, 248, 0.72) 46%, rgba(248, 250, 248, 0.22) 100%);
}

.section-catalog {
  background:
    radial-gradient(circle at 72% 48%, rgba(232, 223, 197, 0.72), transparent 36%),
    linear-gradient(90deg, rgba(248, 250, 248, 0.95) 0%, rgba(248, 250, 248, 0.78) 40%, rgba(248, 250, 248, 0.2) 75%),
    repeating-linear-gradient(90deg, transparent 0 72px, rgba(117, 97, 58, 0.045) 73px),
    rgba(238, 244, 241, 0.34);
}

.story-scene {
  position: relative;
  display: grid;
  align-items: center;
  min-height: 100dvh;
  padding-top: calc(var(--header-height) + 58px);
  padding-bottom: 76px;
}

.feature-scene {
  position: relative;
  min-width: 0;
  overflow: clip;
  border-top: 1px solid rgba(25, 53, 46, 0.1);
}

[data-step]::after {
  position: absolute;
  z-index: 0;
  right: 3vw;
  bottom: -0.22em;
  content: attr(data-step);
  color: rgba(25, 53, 46, 0.055);
  font-family: "Arial Narrow", "Roboto Condensed", sans-serif;
  font-size: clamp(180px, 30vw, 470px);
  font-weight: 760;
  letter-spacing: -0.08em;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.scene-songs {
  background:
    radial-gradient(circle at 35% 50%, rgba(213, 228, 240, 0.62), transparent 42%),
    linear-gradient(270deg, rgba(248, 250, 248, 0.88) 0%, rgba(248, 250, 248, 0.66) 38%, rgba(248, 250, 248, 0.12) 74%),
    repeating-linear-gradient(0deg, transparent 0 56px, rgba(48, 86, 110, 0.07) 57px);
}

.scene-interaction {
  background:
    radial-gradient(circle at 69% 50%, rgba(225, 218, 238, 0.7), transparent 34%),
    linear-gradient(90deg, rgba(248, 250, 248, 0.88) 0%, rgba(248, 250, 248, 0.64) 43%, rgba(248, 250, 248, 0.14) 78%),
    repeating-radial-gradient(circle at 69% 50%, transparent 0 42px, rgba(88, 76, 126, 0.045) 43px 44px);
}

.scene-overlay {
  background:
    radial-gradient(circle at 33% 50%, rgba(208, 229, 239, 0.65), transparent 36%),
    linear-gradient(270deg, rgba(248, 250, 248, 0.88) 0%, rgba(248, 250, 248, 0.66) 39%, rgba(248, 250, 248, 0.12) 74%),
    linear-gradient(150deg, rgba(207, 225, 232, 0.38), rgba(238, 244, 241, 0.12));
}

.section-inner {
  position: relative;
  z-index: 3;
}

.scene-layout {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  align-items: center;
}

.scene-layout-end .feature-copy {
  grid-column: 8 / -1;
}

.scene-layout-start .feature-copy {
  grid-column: 1 / span 5;
}

.scene-copy {
  position: relative;
  z-index: 3;
  max-width: 650px;
  text-shadow: 0 2px 24px rgba(25, 53, 46, 0.1);
}

.scene-copy::before {
  position: absolute;
  z-index: -1;
  inset: -54px -72px;
  content: "";
  pointer-events: none;
  background: radial-gradient(ellipse at center, rgba(248, 250, 248, 0.82), transparent 70%);
  filter: blur(12px);
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 14px;
  margin: 0 0 21px;
  color: var(--champagne-ink);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.14em;
  line-height: 1.45;
  text-transform: uppercase;
}

.section-kicker::before {
  width: 34px;
  height: 1px;
  content: "";
  background: currentColor;
  opacity: 0.54;
}

.scene-count {
  color: rgba(25, 53, 46, 0.58);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.08em;
}

.scene-copy h1,
.scene-copy h2,
.scene-copy h3 {
  margin: 0;
  color: var(--light-text);
  font-weight: 520;
  letter-spacing: -0.058em;
  line-height: 1.08;
  text-wrap: balance;
}

.scene-copy h2,
.scene-copy h3 {
  max-width: 11em;
  font-size: clamp(46px, 5.2vw, 76px);
}

.section-lead,
.scene-copy > p:not(.section-kicker, .catalog-note, .feature-detail) {
  max-width: 36rem;
  margin: 27px 0 0;
  color: var(--light-muted);
  font-size: clamp(15px, 1.25vw, 18px);
  line-height: 1.85;
  text-wrap: pretty;
}

.hero {
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
}

.hero-copy {
  padding-top: 2vh;
}

.hero h1 {
  max-width: 800px;
  font-size: clamp(55px, 6.8vw, 102px);
}

.hero h1 span {
  display: block;
  width: fit-content;
  max-width: 100%;
}

.hero h1 span:last-child {
  color: var(--champagne-ink);
}

.hero-summary {
  max-width: 31rem;
  margin: 31px 0 0;
  color: rgba(25, 53, 46, 0.72);
  font-size: clamp(15px, 1.35vw, 18px);
  line-height: 1.85;
  text-wrap: pretty;
}

.feature-detail {
  max-width: 30rem;
  margin: 35px 0 0;
  padding-top: 17px;
  border-top: 1px solid var(--line);
  color: var(--champagne-ink);
  font-size: 13px;
  line-height: 1.7;
}

.primary-link,
.catalog-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  min-width: 238px;
  max-width: 100%;
  margin-top: 38px;
  padding: 10px 11px 10px 19px;
  border: 1px solid var(--champagne);
  border-radius: 999px;
  color: var(--void);
  background: var(--champagne);
  box-shadow: 0 14px 45px rgba(25, 53, 46, 0.16);
  font-size: 13px;
  font-weight: 760;
  text-decoration: none;
  white-space: nowrap;
  transition:
    color 240ms ease,
    background 240ms ease,
    transform 240ms var(--ease-out);
}

.catalog-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.catalog-links .catalog-link {
  margin-top: 0;
}

.primary-link > span:last-child,
.catalog-link > span:last-child {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  color: var(--champagne);
  background: var(--void);
  font-size: 15px;
  line-height: 1;
}

.primary-link:hover,
.catalog-link:hover {
  color: var(--champagne);
  background: rgba(25, 53, 46, 0.9);
  transform: translateY(-2px);
}

.primary-link:active,
.catalog-link:active {
  transform: translateY(0) scale(0.98);
}

.audience {
  grid-template-columns: minmax(0, 0.74fr) minmax(510px, 1.26fr);
  gap: clamp(56px, 8vw, 126px);
}

.audience-copy h2 {
  max-width: 10em;
}

.role-comparison {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  min-height: 420px;
  overflow: hidden;
  border: 1px solid rgba(25, 53, 46, 0.2);
  background: rgba(248, 250, 248, 0.58);
  box-shadow: 0 32px 90px rgba(25, 53, 46, 0.14);
  backdrop-filter: blur(5px);
}

.role-panel {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 36px;
}

.role-panel + .role-panel {
  border-left: 1px solid rgba(25, 53, 46, 0.16);
}

.role-host {
  background: linear-gradient(155deg, rgba(220, 235, 227, 0.94), rgba(248, 250, 248, 0.64));
}

.role-viewer {
  background: linear-gradient(155deg, rgba(232, 240, 236, 0.78), rgba(238, 244, 241, 0.7));
}

.role-label {
  color: var(--champagne-ink);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.14em;
}

.role-panel h3 {
  max-width: 11em;
  margin: 19px 0 0;
  font-size: clamp(23px, 1.8vw, 28px);
  font-weight: 540;
  letter-spacing: -0.045em;
  line-height: 1.2;
}

.role-panel p {
  max-width: 22rem;
  margin: 19px 0 0;
  color: rgba(25, 53, 46, 0.7);
  font-size: 14px;
  line-height: 1.8;
}

.catalog {
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.75fr);
}

.catalog-copy h2 {
  max-width: 9em;
}

.catalog-note {
  margin: 17px 0 0;
  color: rgba(25, 53, 46, 0.58);
  font-size: 11px;
  letter-spacing: 0.04em;
}

[data-reveal] {
  opacity: 1;
  transform: none;
}

.js .story-scene [data-reveal],
.js .feature-scene [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 850ms var(--ease-out),
    transform 850ms var(--ease-out);
}

.js .story-scene.is-visible [data-reveal],
.js .feature-scene.is-visible [data-reveal],
.js .page-section.is-visible > .story-scene [data-reveal] {
  opacity: 1;
  transform: translateY(0);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 25px max(48px, calc((100% - var(--section-width)) / 2));
  border-top: 1px solid var(--line);
  color: rgba(25, 53, 46, 0.62);
  background: rgba(248, 250, 248, 0.92);
  font-size: 12px;
}

.site-footer button {
  padding: 5px 0;
  border: 0;
  color: var(--champagne-ink);
  background: transparent;
  cursor: pointer;
  font-size: 12px;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(139, 94, 39, 0.52);
  text-underline-offset: 4px;
}

.site-footer button:hover {
  color: var(--light-text);
}

.cookie-consent {
  position: fixed;
  z-index: 60;
  right: 18px;
  bottom: calc(18px + env(safe-area-inset-bottom));
  left: 18px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  gap: 28px;
  width: min(960px, calc(100% - 36px));
  margin-inline: auto;
  padding: 22px 24px;
  border: 1px solid rgba(25, 53, 46, 0.24);
  border-radius: 14px;
  color: var(--light-text);
  background: rgba(248, 250, 248, 0.95);
  box-shadow: 0 28px 80px rgba(25, 53, 46, 0.18);
  backdrop-filter: blur(18px) saturate(115%);
}

.cookie-copy {
  min-width: 0;
}

.cookie-copy .section-kicker {
  margin-bottom: 5px;
}

.cookie-copy h2 {
  margin: 5px 0 7px;
  color: var(--light-text);
  font-size: 19px;
  font-weight: 680;
}

.cookie-copy p:last-child {
  max-width: 42rem;
  margin: 0;
  color: var(--light-muted);
  font-size: 12px;
  line-height: 1.65;
}

.cookie-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  width: 260px;
}

.cookie-button {
  min-height: 42px;
  padding: 8px 11px;
  border: 1px solid rgba(25, 53, 46, 0.28);
  border-radius: 999px;
  cursor: pointer;
  font-size: 11px;
  font-weight: 720;
  transition:
    color 180ms ease,
    background 180ms ease,
    transform 180ms ease;
}

.cookie-button-primary {
  color: var(--void);
  border-color: var(--champagne);
  background: var(--champagne);
}

.cookie-button-secondary {
  color: var(--light-text);
  background: transparent;
}

.cookie-button:hover {
  transform: translateY(-1px);
}

.cookie-button:active {
  transform: translateY(0) scale(0.98);
}

@media (max-width: 1100px) {
  .site-frame,
  .section-inner {
    width: min(100% - 64px, var(--section-width));
  }

  .scene-layout-end .feature-copy {
    grid-column: 7 / -1;
  }

  .scene-layout-start .feature-copy {
    grid-column: 1 / span 6;
  }

  .audience {
    grid-template-columns: minmax(0, 0.72fr) minmax(450px, 1.28fr);
    gap: 48px;
  }

  .role-panel {
    padding: 27px;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 68px;
  }

  body::before {
    background-size: 38px 38px;
    mask-image: linear-gradient(180deg, black, transparent 61%);
  }

  .site-frame,
  .section-inner {
    width: min(100% - 36px, var(--section-width));
  }

  .site-header-frame {
    padding: 12px 0;
  }

  .site-header-frame::after {
    right: 18px;
    left: 18px;
  }

  .story-scene {
    min-height: 100dvh;
    padding-top: clamp(300px, 45svh, 400px);
    padding-bottom: 58px;
  }

  .scene-layout,
  .hero,
  .audience,
  .catalog {
    display: grid;
    grid-template-columns: 1fr;
    align-items: end;
  }

  .scene-layout-end .feature-copy,
  .scene-layout-start .feature-copy {
    grid-column: 1;
  }

  .section-hero,
  .scene-interaction,
  .section-audience,
  .section-catalog,
  .scene-songs,
  .scene-overlay {
    background-color: rgba(248, 250, 248, 0.5);
    background-blend-mode: normal;
  }

  [data-step]::after {
    top: 7vh;
    right: -0.03em;
    bottom: auto;
    font-size: clamp(150px, 58vw, 250px);
  }

  .scene-copy::before {
    inset: -42px -34px;
    background: radial-gradient(ellipse at 50% 70%, rgba(248, 250, 248, 0.84), transparent 72%);
  }

  .section-kicker {
    margin-bottom: 17px;
  }

  .scene-copy h2,
  .scene-copy h3,
  .audience-copy h2 {
    max-width: 11em;
    font-size: clamp(38px, 11vw, 54px);
  }

  .hero h1 {
    max-width: 9.5em;
    font-size: clamp(43px, 13.5vw, 62px);
  }

  .hero-summary {
    max-width: 28rem;
    margin-top: 24px;
    font-size: 15px;
  }

  .section-lead,
  .scene-copy > p:not(.section-kicker, .catalog-note, .feature-detail) {
    margin-top: 21px;
    font-size: 15px;
  }

  .feature-detail {
    margin-top: 27px;
  }

  .primary-link,
  .catalog-link {
    min-width: min(100%, 238px);
    margin-top: 30px;
  }

  .catalog-links {
    margin-top: 30px;
  }

  .audience {
    align-content: end;
    gap: 38px;
  }

  .role-comparison {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .role-panel {
    min-height: 225px;
    padding: 27px;
  }

  .role-panel + .role-panel {
    border-top: 1px solid rgba(25, 53, 46, 0.16);
    border-left: 0;
  }

  .site-footer {
    width: 100%;
    padding: 22px 18px calc(24px + env(safe-area-inset-bottom));
  }

  .cookie-consent {
    grid-template-columns: 1fr;
    align-items: stretch;
    gap: 17px;
    padding: 18px;
  }

  .cookie-actions {
    width: 100%;
  }
}

@media (max-width: 420px) {
  .brand-name {
    font-size: 14px;
  }

  .locale-switch button {
    min-width: 36px;
    padding-inline: 7px;
  }

  .story-scene {
    padding-top: max(265px, 42svh);
    padding-bottom: 45px;
  }

  .hero h1 {
    font-size: clamp(40px, 13.2vw, 54px);
  }

  .scene-copy h2,
  .scene-copy h3,
  .audience-copy h2 {
    font-size: clamp(35px, 10.6vw, 46px);
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 320px) {
  .site-frame,
  .section-inner {
    width: calc(100% - 28px);
  }

  .story-scene {
    padding-top: 250px;
  }

  .hero h1 {
    font-size: 38px;
  }

  .primary-link,
  .catalog-link {
    width: 100%;
    min-width: 0;
    gap: 14px;
    font-size: 12px;
  }
  .catalog-links {
    flex-direction: column;
  }

  .cookie-consent {
    right: 8px;
    bottom: calc(8px + env(safe-area-inset-bottom));
    left: 8px;
    width: calc(100% - 16px);
    padding: 14px;
  }

  .cookie-actions {
    gap: 6px;
  }

  .cookie-button {
    padding-inline: 7px;
    font-size: 10px;
  }
}

@media (max-height: 700px) and (min-width: 768px) {
  .story-scene {
    padding-top: calc(var(--header-height) + 28px);
    padding-bottom: 36px;
  }

  .hero h1 {
    font-size: clamp(44px, 5.6vw, 70px);
  }

  .scene-copy h2,
  .scene-copy h3,
  .audience-copy h2 {
    font-size: clamp(38px, 4.6vw, 58px);
  }

  .role-comparison {
    min-height: 360px;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .js .story-scene [data-reveal],
  .js .feature-scene [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .locale-switch,
  .cookie-consent,
  .role-comparison {
    backdrop-filter: none;
  }

  .locale-switch,
  .cookie-consent {
    background: #f3f7f4;
  }
}

@media (forced-colors: active) {
  .particle-field,
  body::before,
  [data-step]::after {
    display: none;
  }

  .page-section,
  .feature-scene,
  .section-hero,
  .section-workflow,
  .section-audience,
  .section-catalog {
    background: Canvas;
  }

  .scene-copy,
  .scene-copy h1,
  .scene-copy h2,
  .scene-copy h3,
  .role-panel,
  .site-footer {
    color: CanvasText;
    text-shadow: none;
  }
}