@font-face {
  font-family: "Kanit";
  src: url("/assets/fonts/kanit-500-subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: "Kanit";
  src: url("/assets/fonts/kanit-600-subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 600;
  font-display: swap;
}

@font-face {
  font-family: "Kanit";
  src: url("/assets/fonts/kanit-700-subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "Kanit";
  src: url("/assets/fonts/kanit-800-subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 800;
  font-display: swap;
}

@font-face {
  font-family: "Kanit";
  src: url("/assets/fonts/kanit-900-subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 900;
  font-display: swap;
}

@font-face {
  font-family: "Noto Sans SC";
  src: url("/assets/fonts/noto-sans-sc-100-900-subset.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --surge-bg: #0c0c0c;
  --surge-surface: #161616;
  --surge-paper: #ffffff;
  --surge-text: #d7e2ea;
  --surge-ink: #0c0c0c;
  --surge-metal-dark: #646973;
  --surge-metal-light: #bbccd7;
  --surge-line-dark: rgba(12, 12, 12, 0.15);
  --surge-line-light: rgba(215, 226, 234, 0.16);
  --surge-accent-shadow: rgba(181, 1, 167, 0.25);
  --surge-accent-inset: #7721b1;
  --surge-metal-gradient: linear-gradient(180deg, #646973 0%, #bbccd7 100%);
  --surge-accent-gradient: linear-gradient(123deg, #18011f 7%, #b600a8 37%, #7621b0 72%, #be4c00 100%);

  --font-body: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-latin: "Kanit", "Arial Narrow", sans-serif;

  --type-label: clamp(0.75rem, 0.72rem + 0.15vw, 0.875rem);
  --type-body: clamp(1rem, 0.96rem + 0.2vw, 1.125rem);
  --type-lead: clamp(1.125rem, 1.02rem + 0.45vw, 1.375rem);
  --type-h3: clamp(1.375rem, 1.15rem + 1vw, 1.875rem);
  --type-h2: clamp(1.875rem, 1.15rem + 2.8vw, 4rem);
  --type-display: clamp(2.125rem, 1.125rem + 4.2vw, 4.75rem);
  --type-latin-xl: clamp(4rem, 2rem + 6vw, 9rem);

  --leading-label: 1.35;
  --leading-body: 1.75;
  --leading-lead: 1.65;
  --leading-heading: 1.14;
  --leading-display: 1.08;
  --leading-latin: 0.86;

  --tracking-body: 0;
  --tracking-label: 0.08em;
  --tracking-heading: -0.015em;
  --tracking-latin: -0.055em;
  --tracking-brand: 0.1em;

  --space-none: 0;
  --space-auto: auto;
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-5: 3rem;
  --space-6: 4rem;
  --space-7: 6rem;
  --space-8: 8rem;

  --gutter: clamp(1.25rem, 3.5vw, 4rem);
  --section-space: clamp(5rem, 7.1vw, 8.5rem);
  --section-space-tight: clamp(4rem, 5.5vw, 6rem);
  --shell: 80rem;
  --radius-section: clamp(2rem, 4vw, 4rem);
  --radius-card: clamp(1.5rem, 3vw, 3rem);
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
  background: var(--surge-bg);
  scroll-behavior: smooth;
  font-synthesis: none;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: var(--space-none);
  overflow-x: clip;
  background: var(--surge-bg);
  color: var(--surge-text);
  font-family: var(--font-body);
  font-size: var(--type-body);
  font-weight: 400;
  letter-spacing: var(--tracking-body);
  line-height: var(--leading-body);
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

h1,
h2,
h3,
p,
blockquote,
dl,
dd,
ol,
ul {
  margin: var(--space-none);
}

h1,
h2,
h3 {
  font-family: var(--font-body);
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
  text-wrap: wrap;
}

p,
li {
  text-wrap: pretty;
}

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

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

button {
  color: inherit;
  font: inherit;
}

section,
footer {
  scroll-margin-top: var(--space-6);
}

.shell {
  width: min(calc(100% - (var(--gutter) * 2)), var(--shell));
  margin-inline: var(--space-auto);
}

.skip-link {
  position: fixed;
  top: var(--space-1);
  left: var(--space-1);
  z-index: 1000;
  padding: var(--space-1) var(--space-2);
  border-radius: 999px;
  background: var(--surge-paper);
  color: var(--surge-ink);
  transform: translateY(-160%);
  transition: transform 180ms ease;
}

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

:focus-visible {
  outline: 3px solid var(--surge-paper);
  outline-offset: 4px;
}

.section-dark {
  position: relative;
  background: var(--surge-bg);
}

.section-paper {
  position: relative;
  z-index: 2;
  border-radius: var(--radius-section) var(--radius-section) 0 0;
  background: var(--surge-paper);
  color: var(--surge-ink);
}

.metal-text {
  background: var(--surge-metal-gradient);
  background-clip: text;
  color: transparent;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.display-line {
  display: block;
  white-space: nowrap;
}

.heading-layout {
  display: block;
}

.heading-layout-compact,
.heading-layout-medium {
  display: none;
}

.section-label,
.eyebrow {
  margin-bottom: var(--space-3);
  color: var(--surge-metal-light);
  font-family: var(--font-body);
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  line-height: var(--leading-label);
  text-transform: uppercase;
}

.section-label-dark {
  color: rgba(12, 12, 12, 0.62);
}

.display-title,
.contact-title {
  font-size: var(--type-display);
  font-feature-settings: "palt" 1;
  font-kerning: normal;
  font-weight: 700;
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-display);
}

.display-title {
  max-width: 74rem;
  margin-bottom: var(--space-6);
}

.display-title-dark {
  color: var(--surge-ink);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
}

.button {
  display: inline-flex;
  min-height: 3.25rem;
  align-items: center;
  justify-content: center;
  padding: var(--space-1) var(--space-3);
  border: 1.5px solid transparent;
  border-radius: 9999px;
  font-family: var(--font-body);
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  line-height: var(--leading-label);
  transition: transform 180ms ease, filter 180ms ease, background 180ms ease, border-color 180ms ease;
}

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

.button-primary {
  border-color: rgba(255, 255, 255, 0.8);
  background: var(--surge-accent-gradient);
  box-shadow: 0 4px 14px var(--surge-accent-shadow), inset 3px 3px 12px var(--surge-accent-inset);
  color: var(--surge-paper);
}

.button-primary:hover {
  filter: brightness(1.12);
}

.button-secondary {
  border-color: rgba(215, 226, 234, 0.5);
  background: rgba(215, 226, 234, 0.02);
  color: var(--surge-text);
}

.button-secondary:hover {
  border-color: rgba(215, 226, 234, 0.85);
  background: rgba(215, 226, 234, 0.1);
}

.button-dark {
  margin-top: var(--space-5);
  border-color: var(--surge-ink);
  background: var(--surge-ink);
  color: var(--surge-paper);
}

.text-link {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  border-bottom: 1px solid rgba(215, 226, 234, 0.5);
  font-size: var(--type-body);
}

.tag-list,
.status-row,
.contact-intents {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  padding: var(--space-none);
  list-style: none;
}

.tag-list li,
.status-row span,
.contact-intents li {
  display: inline-flex;
  min-height: 2rem;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  line-height: var(--leading-label);
  opacity: 0.7;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 100;
  display: flex;
  width: 100%;
  min-height: 4.75rem;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-1) var(--gutter);
  border-bottom: 1px solid transparent;
  transition: background 220ms ease, border-color 220ms ease, backdrop-filter 220ms ease;
}

.site-header.is-scrolled,
.site-header.menu-active {
  border-color: rgba(215, 226, 234, 0.12);
  background: rgba(12, 12, 12, 0.96);
}

.site-header.is-scrolled {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

.site-header.menu-active {
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}

.brand {
  position: relative;
  z-index: 2;
  display: inline-flex;
  min-height: 2.75rem;
  align-items: baseline;
  gap: var(--space-1);
}

.brand-en {
  font-family: var(--font-latin);
  font-size: var(--type-lead);
  font-weight: 800;
  letter-spacing: var(--tracking-brand);
  line-height: var(--leading-label);
}

.brand-cn {
  color: rgba(215, 226, 234, 0.58);
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.site-nav a {
  position: relative;
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  color: rgba(215, 226, 234, 0.76);
  font-size: var(--type-label);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  transition: color 180ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: var(--space-1);
  left: 0;
  height: 1px;
  background: var(--surge-metal-light);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.site-nav a:hover {
  color: var(--surge-text);
}

.site-nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-toggle {
  position: relative;
  z-index: 2;
  display: none;
  min-width: 4.75rem;
  min-height: 2.75rem;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  border: 1px solid var(--surge-line-light);
  border-radius: 999px;
  background: transparent;
}

.menu-icon {
  display: grid;
  width: 1rem;
  gap: var(--space-1);
}

.menu-icon i {
  display: block;
  width: 100%;
  height: 1px;
  background: currentColor;
  transition: transform 180ms ease;
}

.menu-toggle[aria-expanded="true"] .menu-icon i:first-child {
  transform: translateY(4px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-icon i:last-child {
  transform: translateY(-4px) rotate(-45deg);
}

/* Shared contact footer */
.contact {
  position: relative;
  overflow: hidden;
  padding-top: var(--section-space);
  background: var(--surge-bg);
}

.contact-beam {
  position: absolute;
  top: 0;
  right: 20%;
  width: 22rem;
  height: 1px;
  background: var(--surge-accent-gradient);
  box-shadow: 0 0 45px 12px rgba(181, 1, 167, 0.2);
}

.contact-layout {
  display: grid;
  padding-bottom: var(--section-space);
  align-items: end;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

.contact-title {
  margin-bottom: var(--space-none);
}

.contact-copy > p {
  margin-bottom: var(--space-4);
  color: rgba(215, 226, 234, 0.74);
  font-size: var(--type-lead);
  line-height: var(--leading-lead);
}

.contact-intents {
  margin-bottom: var(--space-4);
}

.footer-line {
  display: flex;
  min-height: 5rem;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  border-top: 1px solid var(--surge-line-light);
  color: rgba(215, 226, 234, 0.45);
  font-size: var(--type-label);
  letter-spacing: var(--tracking-label);
}

.footer-line a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
}

/* Progressive motion */
.js-ready .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 680ms var(--ease), transform 680ms var(--ease);
}

.js-ready .reveal.in {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 100ms !important;
}

.reveal-delay-2 {
  transition-delay: 180ms !important;
}

.reveal-delay-3 {
  transition-delay: 260ms !important;
}

@media (max-width: 63.999rem) {
  .site-nav {
    position: fixed;
    inset: 0;
    z-index: 1;
    width: 100vw;
    height: 100dvh;
    min-height: 100svh;
    padding: var(--space-7) var(--gutter) var(--space-5);
    align-items: stretch;
    flex-direction: column;
    justify-content: center;
    background: rgba(12, 12, 12, 0.99);
    gap: var(--space-none);
    opacity: 0;
    overflow-y: auto;
    overscroll-behavior: contain;
    pointer-events: none;
    transform: translateY(-1rem);
    transition: opacity 200ms ease, transform 200ms ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    min-height: 4rem;
    border-bottom: 1px solid var(--surge-line-light);
    font-size: var(--type-h3);
  }

  .site-nav a::after {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
  }

  html:not(.js-ready) .site-header {
    position: relative;
    inset: auto;
    flex-wrap: wrap;
    background: var(--surge-bg);
  }

  html:not(.js-ready) .menu-toggle {
    display: none;
  }

  html:not(.js-ready) .site-nav {
    position: static;
    width: 100%;
    height: auto;
    min-height: 0;
    padding: var(--space-none);
    flex-flow: row wrap;
    justify-content: flex-start;
    background: transparent;
    gap: var(--space-1) var(--space-3);
    opacity: 1;
    overflow: visible;
    pointer-events: auto;
    transform: none;
  }

  html:not(.js-ready) .site-nav a {
    min-height: 2.75rem;
    border-bottom: 0;
    font-size: var(--type-label);
  }
}

@media (min-width: 64rem) {
  .contact-layout {
    gap: var(--space-7);
    grid-template-columns: minmax(0, 1.1fr) minmax(20rem, 0.9fr);
  }
}

@media (min-width: 30rem) and (max-width: 74.999rem) {
  .heading-layout-wide {
    display: none;
  }

  .heading-layout-medium {
    display: block;
  }
}

@media (max-width: 29.999rem) {
  .heading-layout-wide {
    display: none;
  }

  .heading-layout-compact {
    display: block;
  }

  .brand-cn {
    display: none;
  }

  .button-row {
    align-items: stretch;
    flex-direction: column;
  }

  .button-row .button {
    width: 100%;
  }

  .footer-line {
    min-height: 6rem;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }
}

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

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

  .js-ready .reveal {
    opacity: 1;
    transform: none;
  }
}