/* ============================================================
   WX DESIGN ENGINE — Wanxiang Xinyu site family
   Shared foundation: tokens, typography, motion primitives.
   Each site skins via :root custom properties.
   ============================================================ */

:root {
  /* skin (per-site overrides) */
  --bg: #0a0a0b;
  --bg-2: #111113;
  --ink: #f4f2ec;
  --ink-dim: rgba(244, 242, 236, 0.62);
  --ink-faint: rgba(244, 242, 236, 0.34);
  --line: rgba(244, 242, 236, 0.14);
  --accent: #ff4d00;
  --accent-ink: #0a0a0b;
  --paper: #f4f2ec;

  /* type */
  --f-display: "Syne", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --f-sans: "Space Grotesk", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --f-serif: "Noto Serif SC", "Songti SC", "STSong", serif;
  --f-mono: "JetBrains Mono", "Noto Sans SC", ui-monospace, "SF Mono", monospace;

  /* motion */
  --e-out: cubic-bezier(0.16, 1, 0.3, 1);
  --e-in-out: cubic-bezier(0.83, 0, 0.17, 1);
  --e-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --nav-h: 76px;
  --radius: 2px;
  --wrap: 1560px;
  --gutter: clamp(20px, 4vw, 64px);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html.wx-locked { overflow: hidden; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--f-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
  min-height: 100vh;
}
img, svg, video, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--ink) 22%, transparent); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ---------- icons ---------- */
svg.ic { width: 1.1em; height: 1.1em; flex: none; display: inline-block; vertical-align: -0.18em; }

/* ---------- typography ---------- */
.display-1 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(44px, 9.5vw, 168px);
  line-height: 0.98;
  letter-spacing: -0.03em;
  text-transform: uppercase;
}
.display-2 {
  font-family: var(--f-display);
  font-weight: 800;
  font-size: clamp(34px, 6vw, 104px);
  line-height: 1.02;
  letter-spacing: -0.025em;
}
.h-serif { font-family: var(--f-serif); font-weight: 600; letter-spacing: 0.01em; }
.kicker {
  font-family: var(--f-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.32em;
  text-transform: uppercase;
  color: var(--ink-dim);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.kicker::before { content: ""; width: 24px; height: 1px; background: var(--accent); }
.kicker--bare::before { display: none; }
.mono { font-family: var(--f-mono); }
.lead { font-size: clamp(17px, 1.6vw, 22px); line-height: 1.75; color: var(--ink-dim); max-width: 34em; }
.stroke-text {
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
}
.v-rl { writing-mode: vertical-rl; text-orientation: mixed; }
.num { font-family: var(--f-mono); font-variant-numeric: tabular-nums; }

/* ---------- layout ---------- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding-inline: var(--gutter); }
.section { position: relative; padding-block: clamp(90px, 12vw, 200px); }
.grid { display: grid; gap: 24px; }
.flex-between { display: flex; justify-content: space-between; align-items: center; gap: 24px; }
.hr { border: 0; border-top: 1px solid var(--line); }

/* ---------- nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 90;
  height: var(--nav-h);
  display: flex; align-items: center; justify-content: space-between;
  padding-inline: var(--gutter);
  mix-blend-mode: difference;
  color: #fff;
  transition: transform 0.6s var(--e-out);
}
.nav--hidden { transform: translateY(-110%); }
.nav__brand { font-family: var(--f-display); font-weight: 800; letter-spacing: 0.02em; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.nav__links { display: flex; gap: clamp(18px, 2.6vw, 44px); font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.14em; text-transform: uppercase; }
.nav__links a { position: relative; opacity: 0.75; transition: opacity 0.3s; padding-block: 6px; }
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 1px; width: 100%;
  background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform 0.5s var(--e-out);
}
.nav__links a:hover { opacity: 1; }
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }
.nav__toggle { display: none; }
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__toggle { display: block; font-family: var(--f-mono); font-size: 12px; letter-spacing: 0.2em; }
  .nav__links.is-open {
    display: flex; flex-direction: column; position: fixed; inset: 0;
    background: var(--bg); color: var(--ink);
    align-items: center; justify-content: center; gap: 32px;
    font-size: 20px; z-index: 95;
  }
}

/* ---------- buttons & chips ---------- */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: 12px;
  padding: 16px 30px; border: 1px solid var(--ink);
  border-radius: 999px; overflow: hidden; isolation: isolate;
  font-family: var(--f-mono); font-size: 12.5px; font-weight: 500;
  letter-spacing: 0.18em; text-transform: uppercase;
  transition: color 0.45s var(--e-out), border-color 0.45s var(--e-out);
  cursor: pointer;
}
.btn::before {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: var(--ink); border-radius: inherit;
  transform: translateY(101%); transition: transform 0.55s var(--e-out);
}
.btn:hover { color: var(--bg); }
.btn:hover::before { transform: translateY(0); }
.btn--fill { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--fill::before { background: var(--ink); }
.btn--fill:hover { color: var(--accent-ink); border-color: var(--ink); }
.btn .ic { transition: transform 0.45s var(--e-out); }
.btn:hover .ic { transform: translate(3px, -3px); }

.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border: 1px solid var(--line); border-radius: 999px;
  font-family: var(--f-mono); font-size: 11.5px; letter-spacing: 0.12em;
  color: var(--ink-dim); white-space: nowrap;
}

/* ---------- card ---------- */
.card {
  position: relative; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--bg-2); overflow: hidden;
  transition: border-color 0.5s var(--e-out), transform 0.6s var(--e-out);
}
.card:hover { border-color: color-mix(in srgb, var(--accent) 60%, var(--line)); }
.card__glare {
  position: absolute; inset: 0; z-index: 1; pointer-events: none; opacity: 0;
  background: radial-gradient(560px circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--accent) 14%, transparent), transparent 42%);
  transition: opacity 0.5s;
}
.card:hover .card__glare { opacity: 1; }

/* ---------- marquee ---------- */
.marquee { overflow: clip; white-space: nowrap; display: flex; user-select: none; }
.marquee__track { display: flex; flex: none; align-items: center; gap: var(--marquee-gap, 48px); padding-right: var(--marquee-gap, 48px); animation: wx-marquee var(--marquee-dur, 26s) linear infinite; }
.marquee--reverse .marquee__track { animation-direction: reverse; }
.marquee:hover .marquee__track { animation-play-state: var(--marquee-hover, running); }
@keyframes wx-marquee { to { transform: translateX(-100%); } }

/* ---------- grain ---------- */
.grain {
  position: fixed; inset: -100%; z-index: 200; pointer-events: none; opacity: 0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.72' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: wx-grain 0.9s steps(4) infinite;
}
@keyframes wx-grain {
  0% { transform: translate(0, 0); } 25% { transform: translate(-2%, 3%); }
  50% { transform: translate(3%, -2%); } 75% { transform: translate(-3%, -3%); } 100% { transform: translate(2%, 2%); }
}

/* ---------- custom cursor ---------- */
.cursor, .cursor-ring { position: fixed; top: 0; left: 0; z-index: 300; pointer-events: none; border-radius: 50%; will-change: transform; }
.cursor { width: 8px; height: 8px; background: var(--accent); margin: -4px 0 0 -4px; }
.cursor-ring {
  width: 42px; height: 42px; margin: -21px 0 0 -21px;
  border: 1px solid color-mix(in srgb, var(--ink) 45%, transparent);
  display: grid; place-items: center;
  transition: width 0.4s var(--e-out), height 0.4s var(--e-out), margin 0.4s var(--e-out), background-color 0.4s, border-color 0.4s;
}
.cursor-ring span {
  font-family: var(--f-mono); font-size: 10px; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent-ink); opacity: 0; transition: opacity 0.25s; white-space: nowrap;
}
.cursor-ring.is-active { width: 74px; height: 74px; margin: -37px 0 0 -37px; background: var(--accent); border-color: var(--accent); }
.cursor-ring.is-active span { opacity: 1; }
html:not(.wx-fine) .cursor, html:not(.wx-fine) .cursor-ring { display: none; }
html.wx-fine body { cursor: none; }
html.wx-fine a, html.wx-fine button, html.wx-fine [data-cursor] { cursor: none; }

/* ---------- preloader ---------- */
.loader {
  position: fixed; inset: 0; z-index: 400;
  display: flex; align-items: flex-end; justify-content: space-between;
  padding: var(--gutter); background: var(--bg);
  transition: transform 1s var(--e-in-out) 0.15s;
}
.loader.is-done { transform: translateY(-101%); }
.loader__count { font-family: var(--f-display); font-weight: 800; font-size: clamp(80px, 16vw, 220px); line-height: 0.85; letter-spacing: -0.03em; }
.loader__brand { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--ink-dim); padding-bottom: 18px; }
.loader__bar { position: absolute; left: 0; bottom: 0; height: 2px; background: var(--accent); width: 0%; }

/* ---------- page transition ---------- */
.veil {
  position: fixed; inset: 0; z-index: 350; background: var(--bg);
  transform: translateY(101%); pointer-events: none;
  display: grid; place-items: center;
}
.veil.is-in { transform: translateY(0); transition: transform 0.6s var(--e-in-out); }
.veil.is-out { transform: translateY(-101%); transition: transform 0.6s var(--e-in-out); }
.veil span { font-family: var(--f-display); font-weight: 800; font-size: 13px; letter-spacing: 0.4em; text-transform: uppercase; color: var(--ink-dim); }

/* ---------- progress ---------- */
.progress { position: fixed; top: 0; left: 0; height: 2px; width: 100%; z-index: 120; transform-origin: left; transform: scaleX(0); background: var(--accent); }

/* ---------- reveal system ---------- */
[data-reveal], [data-hero] { will-change: transform, opacity, clip-path; }
[data-reveal="fade"], [data-hero="fade"] { opacity: 0; transition: opacity 1.1s var(--e-out); }
[data-reveal="up"], [data-hero="up"] { opacity: 0; transform: translateY(56px); transition: opacity 1s var(--e-out), transform 1.1s var(--e-out); }
[data-reveal="left"], [data-hero="left"] { opacity: 0; transform: translateX(-56px); transition: opacity 1s var(--e-out), transform 1.1s var(--e-out); }
[data-reveal="right"], [data-hero="right"] { opacity: 0; transform: translateX(56px); transition: opacity 1s var(--e-out), transform 1.1s var(--e-out); }
[data-reveal="scale"], [data-hero="scale"] { opacity: 0; transform: scale(0.92); transition: opacity 1s var(--e-out), transform 1.2s var(--e-out); }
[data-reveal="mask"], [data-hero="mask"] { clip-path: inset(0 0 100% 0); transition: clip-path 1.2s var(--e-out); }
[data-reveal].is-in, [data-hero].is-in { opacity: 1; transform: none; clip-path: inset(0 0 0 0); }

[data-split] { display: block; }
[data-split] .w { display: inline-block; overflow: clip; vertical-align: top; }
[data-split] .c { display: inline-block; transform: translateY(115%) rotate(4deg); transition: transform 0.9s var(--e-out); will-change: transform; }
[data-split].is-in .c { transform: translateY(0) rotate(0); }
html.wx-reduced [data-split] .c { transform: none; transition: none; }

/* ---------- footer ---------- */
.footer { position: relative; border-top: 1px solid var(--line); padding: clamp(60px, 8vw, 120px) 0 40px; background: var(--bg); }
.footer__brand { font-family: var(--f-display); font-weight: 800; font-size: clamp(40px, 8vw, 150px); line-height: 0.95; letter-spacing: -0.03em; text-transform: uppercase; }
.footer a:hover { color: var(--accent); }
.footer__grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 40px; margin-block: 56px 72px; }
@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
.footer h4 { font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--ink-faint); margin-bottom: 18px; font-weight: 500; }
.footer li { margin-bottom: 10px; font-size: 14.5px; color: var(--ink-dim); }
.footer__meta { display: flex; justify-content: space-between; align-items: center; gap: 20px; border-top: 1px solid var(--line); padding-top: 28px; font-family: var(--f-mono); font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ink-faint); flex-wrap: wrap; }

/* ---------- responsive helpers ---------- */
@media (max-width: 900px) {
  :root { --nav-h: 62px; }
  .lead { font-size: 16px; }
}
html.wx-reduced * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.15s !important; }
html.wx-qa *, html.wx-qa *::before, html.wx-qa *::after { transition: none !important; animation: none !important; }