/* ============================================================
   awwwards.css — 护妍 v4.0 「L'Atelier」 · 电影感动效层
   幕布开场 · 行遮罩 · 图片幕帘 · 发丝进度 · 降级策略
   ============================================================ */

/* ---------- 1. 幕布开场 (Ivory Curtain Preloader) ---------- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: var(--z-preloader);
  background: var(--bg-app);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.9s var(--ease-io);
}
.preloader.preloader-done {
  transform: translateY(-100%);
}
.preloader-inner {
  text-align: center;
  transition: opacity 0.4s var(--ease-soft);
}
.preloader-done .preloader-inner { opacity: 0; }
.preloader-logo {
  font-family: var(--font-display);
  font-size: var(--fs-4xl);
  font-weight: 500;
  letter-spacing: var(--ls-brand);
  color: var(--ink);
}
.preloader-bar {
  width: 140px;
  height: 1px;
  background: var(--line-soft);
  margin: var(--sp-6) auto var(--sp-4);
  position: relative;
  overflow: hidden;
}
.preloader-progress {
  position: absolute;
  inset: 0;
  width: 0%;
  background: var(--gold);
}
.preloader-text {
  font-size: 9px;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--ink-3);
}

/* ---------- 2. 滚动揭示系统 (Reveal System) ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity var(--dur-reveal) var(--ease-out), transform var(--dur-reveal) var(--ease-out);
  transition-delay: var(--rd, 0s);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 图片幕帘揭示 (Curtain Wipe) —— clip 作用于内层 img，避免 IO 相交死锁 */
[data-img-reveal] {
  position: relative;
  overflow: hidden;
}
[data-img-reveal] > img {
  clip-path: inset(0 0 100% 0);
  transform: scale(1.14);
  transition: clip-path var(--dur-curtain) var(--ease-io), transform 1.6s var(--ease-out);
}
[data-img-reveal].is-visible > img {
  clip-path: inset(0 0 0% 0);
  transform: scale(1);
}

/* 兼容旧 reveal-up 钩子（JS 统一走 data-reveal） */
.reveal-up { }
.reveal-up.is-visible { }

/* ---------- 3. 滚动进度发丝金线 ---------- */
.u-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  z-index: var(--z-progress);
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- 4. 视图内元素入场（切换视图时由 JS 触发） ---------- */
.v-view.is-active [data-reveal]:not(.is-visible) { }

/* ---------- 11. 动能全屏导航 (Kinetic Menu · v4.2) ---------- */
/* 触发器：文字翻转 + 加号旋转 */
.k-trigger {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 0 8px 16px;
  border-left: 1px solid var(--line-soft);
  cursor: pointer;
  transition: border-color var(--dur-ui) var(--ease-soft);
}
.k-trigger__texts {
  position: relative;
  height: 1.15em;
  width: 2.8em;
  overflow: hidden;
  text-align: left;
}
.k-trigger__texts span {
  position: absolute;
  inset: 0;
  font-size: var(--fs-2xs);
  font-weight: 600;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--ink);
  transition: transform 0.5s var(--ease-out), color var(--dur-ui) var(--ease-soft);
}
.k-trigger__texts span:nth-child(2) { transform: translateY(115%); }
.k-trigger.is-open .k-trigger__texts span:nth-child(1) { transform: translateY(-115%); }
.k-trigger.is-open .k-trigger__texts span:nth-child(2) { transform: translateY(0); }
.k-trigger__icon {
  width: 13px;
  height: 13px;
  color: var(--gold-deep);
  transition: transform 0.55s var(--ease-out), color var(--dur-ui) var(--ease-soft);
}
.k-trigger.is-open .k-trigger__icon { transform: rotate(315deg); }

/* 菜单打开时：导航浮于幕布之上并反色 */
body.k-open .u-nav-wrap { z-index: 950; }
body.k-open .u-nav {
  background: transparent;
  border-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
}
body.k-open .u-nav__brand-zh,
body.k-open .u-nav__cmd-label,
body.k-open .u-nav__health-text { color: var(--on-ink); }
body.k-open .u-nav__brand-en { color: var(--gold); }
body.k-open .c-lang-toggle__opt { color: var(--on-ink-2); }
body.k-open .c-lang-toggle__opt.is-active { color: var(--on-ink); }
body.k-open .c-kbd {
  color: var(--on-ink-2);
  border-color: rgba(243, 237, 226, 0.25);
  background: transparent;
}
body.k-open .k-trigger { border-left-color: rgba(243, 237, 226, 0.2); }
body.k-open .k-trigger__texts span { color: var(--on-ink); }
body.k-open .k-trigger__icon { color: var(--gold); }

/* 菜单骨架 */
.k-menu {
  position: fixed;
  inset: 0;
  z-index: 890;
  pointer-events: none;
}
.k-menu.is-open { pointer-events: auto; }
.k-menu__overlay {
  position: absolute;
  inset: 0;
  background: rgba(22, 18, 12, 0.38);
  opacity: 0;
  visibility: hidden;
}
.k-menu__panel {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(640px, 100%);
  transform: translateX(105%);
  box-shadow: var(--sh-veil);
}
.k-menu__bg { position: absolute; inset: 0; overflow: hidden; }
.k-menu__layer { position: absolute; inset: 0; transform: translateX(101%); }
.k-menu__layer--1 { background: var(--bg-subtle); }
.k-menu__layer--2 { background: var(--bg-card); }
.k-menu__layer--3 { background: var(--bg-ink); }

/* 环境图形：金色发丝体系，hover 联动 */
.k-menu__shapes { position: absolute; inset: 0; }
.k-shape { position: absolute; width: 440px; height: 440px; opacity: 0; }
.k-shape.active { opacity: 1; }
.k-shape--1 { top: -50px; right: -70px; }
.k-shape--2 { bottom: -90px; left: -140px; }
.k-shape--3 { top: 26%; right: 6%; }
.k-shape--4 { bottom: 8%; right: -50px; }
.k-shape--5 { top: 6%; left: -70px; }

/* 内容列 */
.k-menu__inner {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--nav-h) + 3vh) clamp(28px, 6vw, 76px) 5vh;
  color: var(--on-ink);
}
.k-menu__eyebrow {
  font-size: 10px;
  font-weight: 600;
  letter-spacing: var(--ls-caps);
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--sp-8);
}
.k-menu__list { list-style: none; }
.k-menu__item {
  overflow: hidden;
  border-bottom: 1px solid rgba(243, 237, 226, 0.10);
}
.k-menu__link {
  display: flex;
  align-items: baseline;
  gap: var(--sp-5);
  padding: 17px 4px;
  text-decoration: none;
}
.k-menu__num {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--fs-sm);
  color: var(--gold);
  flex-shrink: 0;
}
.k-menu__text {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 4.2vw, 2.75rem);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--on-ink);
  transition: color var(--dur-ui) var(--ease-soft), transform 0.5s var(--ease-out);
}
.k-menu__link:hover .k-menu__text { color: var(--gold); transform: translateX(12px); }
.k-menu__link.is-active .k-menu__text { color: var(--gold); }
.k-menu__foot {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: var(--sp-10);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--on-ink-2);
}

/* 降级：无动效直出 */
.k-menu--static .k-menu__panel { transform: none; }
.k-menu--static .k-menu__layer { transform: none; }
.k-menu--static .k-menu__overlay { opacity: 1; visibility: visible; }

/* ---------- 5. 降级策略 (Reduced Motion) ---------- */
@media (prefers-reduced-motion: reduce) {
  .preloader { display: none; }
  [data-reveal], [data-img-reveal], [data-img-reveal] img,
  .v-hero__line > span, .v-hero__eyebrow, .v-hero__sub, .v-hero__actions, .v-hero__cue {
    opacity: 1 !important;
    transform: none !important;
    clip-path: none !important;
    transition: none !important;
    animation: none !important;
  }
  .v-hero__media img { animation: none !important; transform: none !important; }
  .marquee-track { animation: none !important; }
  html { scroll-behavior: auto; }
}