@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../assets/fonts/harmonyos-sans-sc/HarmonyOS_Sans_SC_Regular.woff2") format("woff2");
  font-style: normal;
  font-weight: 300 449;
  font-display: swap;
}

@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../assets/fonts/harmonyos-sans-sc/HarmonyOS_Sans_SC_Medium.woff2") format("woff2");
  font-style: normal;
  font-weight: 450 699;
  font-display: swap;
}

@font-face {
  font-family: "HarmonyOS Sans SC";
  src: url("../assets/fonts/harmonyos-sans-sc/HarmonyOS_Sans_SC_Bold.woff2") format("woff2");
  font-style: normal;
  font-weight: 700 900;
  font-display: swap;
}

:root {
  --bg: #000000;
  --fg: #f5f5f0;
  --muted: #8e8e86;
  --subtle: #4a4a45;
  --line: rgba(245, 245, 240, 0.16);
  --line-strong: rgba(245, 245, 240, 0.34);
  --surface: #090909;
  --surface-2: #111111;
  --accent: #f5f5f0;
  --danger: #d94a2b;
  --texture-line: rgba(245, 245, 240, 0.055);
  --texture-line-soft: rgba(245, 245, 240, 0.026);
  --texture-grain: rgba(245, 245, 240, 0.05);
  --texture-grain-faint: rgba(245, 245, 240, 0.028);
  --texture-fiber: rgba(245, 245, 240, 0.024);
  --texture-fiber-soft: rgba(245, 245, 240, 0.012);
  --texture-glass: rgba(10, 10, 10, 0.72);
  --texture-sheen: rgba(255, 255, 255, 0.13);
  --edge-emboss-light: rgba(255, 255, 255, 0.105);
  --edge-emboss-dark: rgba(0, 0, 0, 0.58);
  --shadow-material: 0 34px 90px rgba(0, 0, 0, 0.58), inset 0 1px 0 rgba(255, 255, 255, 0.1);
  --shadow-material-soft: 0 22px 62px rgba(0, 0, 0, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.075);
  --shadow-emboss-soft: inset 1px 1px 0 var(--edge-emboss-light), inset -1px -1px 0 var(--edge-emboss-dark);
  --content: min(1360px, calc(100vw - 32px));
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --font-home: "Send Flowers", "Noto Serif SC", "Songti SC", SimSun, serif;
  --font-page: "HarmonyOS Sans SC", "HarmonyOS Sans", "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", sans-serif;
  --font-display: var(--font-home);
  --font-cjk: var(--font-page);
  --font-ui: var(--font-page);
  --fs-hero: clamp(58px, 12vw, 148px);
  --fs-h2: clamp(30px, 4.6vw, 64px);
  --fs-h3: clamp(20px, 2.4vw, 32px);
  --fs-body: clamp(15px, 1.2vw, 17px);
  --fs-small: 12px;
  --track-tight: 0;
  --track-wide: 0;
  --topbar-space: 76px;
  --page-stage-min: calc(100svh - var(--topbar-space));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
  overflow-x: hidden;
}

body {
  margin: 0;
  min-height: 100dvh;
  color: var(--fg);
  background:
    radial-gradient(circle at 1px 1px, var(--texture-grain) 0 0.82px, transparent 1px) 0 0 / 7px 7px,
    radial-gradient(circle at 2px 3px, var(--texture-grain-faint) 0 0.72px, transparent 1px) 0 0 / 11px 11px,
    radial-gradient(ellipse at 50% 42%, rgba(245, 245, 240, 0.018), transparent 56%),
    radial-gradient(ellipse at 50% -12%, rgba(245, 245, 240, 0.032), transparent 38%),
    radial-gradient(ellipse at 82% 12%, rgba(91, 207, 198, 0.035), transparent 34%),
    var(--bg);
  font-family: var(--font-ui);
  overflow-x: hidden;
  letter-spacing: 0;
}

#homeView,
.topbar,
.page-hint {
  font-family: var(--font-home);
}

#blogView,
#aboutView,
#contactView,
.video-player {
  font-family: var(--font-page);
}

.skip-link {
  position: fixed;
  left: 18px;
  top: 14px;
  z-index: 120;
  width: 1px;
  height: 1px;
  min-height: 24px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  padding: 10px 14px;
  color: #000;
  background: var(--fg);
  font-size: 13px;
  font-weight: 800;
}

.skip-link:focus-visible {
  width: auto;
  height: auto;
  overflow: visible;
  clip-path: none;
  outline: 2px solid var(--fg);
  outline-offset: 3px;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse at 72% 18%, rgba(91, 207, 198, 0.07), transparent 32%),
    radial-gradient(ellipse at 16% 76%, rgba(208, 18, 18, 0.05), transparent 38%),
    linear-gradient(var(--texture-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--texture-line-soft) 1px, transparent 1px),
    radial-gradient(circle at 1px 1px, rgba(245, 245, 240, 0.03) 0 0.7px, transparent 0.9px),
    radial-gradient(circle at 2px 3px, rgba(245, 245, 240, 0.018) 0 0.6px, transparent 0.8px);
  background-position: center, center, 0 0, 0 0, 3px 5px, 11px 17px;
  background-size: auto, auto, 64px 64px, 64px 64px, 23px 23px, 31px 31px;
  mask-image: linear-gradient(to bottom, rgba(0,0,0,0.96), rgba(0,0,0,0.78) 64%, transparent 94%);
  pointer-events: none;
}

button {
  border: 0;
  font: inherit;
  cursor: pointer;
  touch-action: manipulation;
}

a {
  color: inherit;
  text-decoration: none;
  touch-action: manipulation;
}

input,
textarea,
select {
  box-sizing: border-box;
  max-width: 100%;
  min-height: 44px;
}

button {
  max-width: 100%;
}

.intro-loader {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: grid;
  place-items: center;
  background: #000;
  color: var(--fg);
  overflow: hidden;
}

.intro-inner {
  width: min(760px, calc(100vw - 44px));
  display: grid;
  place-items: center;
}

.intro-handwrite {
  width: min(640px, calc(100vw - 54px));
  min-height: clamp(104px, 24vw, 178px);
  display: grid;
  place-items: center;
  opacity: 0;
  isolation: isolate;
}

.intro-signature-wrap {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: 640 / 190;
  padding: 0;
  color: var(--fg);
}

.intro-signature-svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
}

.intro-signature-ink path {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.intro-signature-ink path {
  stroke: rgba(245, 245, 240, 0.96);
  stroke-width: 9.2;
  filter: none;
}

.sr-status {
  position: fixed;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

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

.site {
  position: relative;
  width: var(--content);
  margin: 0 auto;
  padding: 0 0 128px;
  padding-left: var(--safe-left);
  padding-right: var(--safe-right);
  opacity: 0;
}

main {
  position: relative;
  min-height: var(--page-stage-min);
}

main.is-transitioning {
  min-height: var(--page-transition-height, var(--page-stage-min));
}

main.is-transitioning .page-view {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 79;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  min-height: 76px;
  padding: 16px 0 18px;
  isolation: isolate;
  background: transparent;
}

.topbar::after {
  content: none;
}

@supports (backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px)) {
  .topbar {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

.brand {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0;
  color: var(--fg);
  background: transparent;
  font-size: 20px;
  line-height: 1.12;
  letter-spacing: 0;
  font-weight: 850;
  text-transform: none;
  text-shadow: 0 0 18px rgba(217, 74, 43, 0.18);
}

.brand::before {
  content: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid rgba(245, 245, 240, 0.18);
  border-radius: 12px;
  background: transparent;
  color: var(--fg);
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 220ms var(--ease), opacity 220ms var(--ease);
}

.nav-toggle:focus-visible {
  outline: 3px solid var(--fg);
  outline-offset: 4px;
}

.nav-links {
  position: relative;
  display: flex;
  gap: 18px;
  align-items: center;
  justify-self: end;
  min-height: 44px;
  padding: 4px;
  border: 1px solid rgba(245, 245, 240, 0.18);
  border-radius: 999px;
  background: transparent;
  box-shadow: none;
}

.nav-btn {
  position: relative;
  min-height: 36px;
  padding: 0 15px;
  border: 1px solid transparent;
  border-radius: 999px;
  color: rgba(245, 245, 240, 0.62);
  background: transparent;
  font-size: var(--fs-small);
  font-family: var(--font-page);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: 0;
  text-transform: none;
  touch-action: manipulation;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease), box-shadow 180ms var(--ease), transform 180ms var(--ease);
}

.project-index,
.project-meta,
.player-meta,
.price-card strong,
.order-summary strong,
.purchase-price-line {
  font-variant-numeric: tabular-nums;
}

.nav-btn::after {
  content: none;
}

.nav-btn:hover,
.nav-btn.active,
.nav-btn[aria-current="page"] {
  color: var(--fg);
  border-color: rgba(245, 245, 240, 0.28);
  background: transparent;
  box-shadow: none;
  text-shadow: 0 0 18px rgba(217, 74, 43, 0.38);
}

.nav-btn:active {
  transform: translateY(1px) scale(0.99);
}

.detail-btn {
  min-height: 38px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background:
    linear-gradient(180deg, rgba(245, 245, 240, 0.032), transparent 54%),
    repeating-linear-gradient(112deg, transparent 0 9px, rgba(245, 245, 240, 0.018) 9px 10px, transparent 10px 18px),
    transparent;
  box-shadow: var(--shadow-emboss-soft);
  font-size: var(--fs-small);
  font-weight: 700;
  letter-spacing: 0;
  transition: color 180ms var(--ease), border-color 180ms var(--ease), background 180ms var(--ease), box-shadow 180ms var(--ease), transform 180ms var(--ease);
}

.brand:focus-visible,
.nav-btn:focus-visible,
.detail-btn:focus-visible {
  outline: 3px solid var(--fg);
  outline-offset: 4px;
}

.detail-btn:hover {
  color: var(--fg);
  border-color: var(--line-strong);
  background:
    linear-gradient(180deg, rgba(245, 245, 240, 0.054), transparent 54%),
    repeating-linear-gradient(112deg, transparent 0 9px, rgba(245, 245, 240, 0.022) 9px 10px, transparent 10px 18px),
    rgba(245, 245, 240, 0.052);
  box-shadow:
    var(--shadow-emboss-soft),
    0 0 18px rgba(245, 245, 240, 0.045);
}

.project-card:active,
.detail-btn:active {
  transform: scale(0.985);
}

@media (max-width: 640px) {
  main.is-transitioning {
    min-height: var(--page-stage-min);
    overflow: hidden;
  }
}