/* ============================================================
   星冕 VR3D — VR 眼镜式 3D 沉浸视觉系统（方案 §3.5）
   ============================================================ */

/* ---------- 3D 场景容器 ---------- */
.scene3d {
  perspective: var(--perspective);
  perspective-origin: 50% 30%;
}
.scene3d .scene-space {
  position: relative;
  transform-style: preserve-3d;
}

/* 背景远景层（默认 1x） */
.layer-bg    { will-change: transform; }
/* 中景层 3x */
.layer-mid   { will-change: transform; }
/* 前景/作品层 6x */
.layer-front { will-change: transform; }
/* 前景装饰 10x */
.layer-deco  { will-change: transform; }

/* 由 JS 注入的视差位移类 */
.parallax-move { transform: translate3d(var(--px, 0), var(--py, 0), 0); }

/* ---------- 星空 / 粒子背景 ---------- */
#starfield {
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  opacity: .95;
}
html[data-theme="light"] #starfield { opacity: .4; }

/* ---------- 3D 透视网格地平线 ---------- */
.vr-grid-floor {
  position: fixed;
  left: -50%;
  right: -50%;
  bottom: -8vh;
  height: 68vh;
  z-index: -2;
  pointer-events: none;
  transform: perspective(900px) rotateX(62deg);
  transform-origin: 50% 0;
  background-image:
    linear-gradient(var(--grid-line-bright) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line-bright) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to top, rgba(0,0,0,.9), transparent 78%);
  -webkit-mask-image: linear-gradient(to top, rgba(0,0,0,.9), transparent 78%);
  animation: gridScroll 26s linear infinite;
  opacity: .5;
}
@keyframes gridScroll {
  from { background-position: 0 0, 0 0; }
  to   { background-position: 0 72px, 72px 0; }
}

/* ---------- 空间浮动光球 ---------- */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
  z-index: 0;
}
.orb-neon  { background: radial-gradient(circle, rgba(139,124,255,.55), transparent 70%); }
.orb-cyan  { background: radial-gradient(circle, rgba(84,225,255,.4), transparent 70%); }
.orb-pink  { background: radial-gradient(circle, rgba(255,110,199,.35), transparent 70%); }

/* ---------- VR 背景场景（每页的氛围背景） ---------- */
.vr-backdrop {
  position: fixed;
  inset: 0;
  z-index: -3;
  overflow: hidden;
  background:
    radial-gradient(1200px 800px at 78% -10%, rgba(139,124,255,.10), transparent 60%),
    radial-gradient(1000px 700px at 10% 110%, rgba(84,225,255,.07), transparent 60%),
    var(--bg);
  transition: background .6s;
}
html[data-theme="light"] .vr-backdrop {
  background:
    radial-gradient(1100px 700px at 80% -10%, rgba(91,79,224,.09), transparent 60%),
    radial-gradient(900px 600px at 8% 110%, rgba(14,155,216,.07), transparent 60%),
    var(--bg);
}

/* ---------- 3D 悬浮作品卡片 ---------- */
.work-card3d {
  position: relative;
  display: block;
  transform-style: preserve-3d;
  border-radius: var(--r-lg);
  overflow: hidden;
  cursor: pointer;
  transition: transform .7s var(--ease);
  background: var(--card);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-2);
}
.work-card3d .card-inner {
  transform-style: preserve-3d;
  position: relative;
}
.work-card3d .card-cover { position: relative; overflow: hidden; }
.work-card3d .card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.001);
  transition: transform 1.2s var(--ease-out), filter .8s;
}
.work-card3d:hover .card-cover img { transform: scale(1.09); }

/* 全息玻璃分层 */
.work-card3d .glass-layer {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(180deg, transparent 35%, rgba(8,8,12,.82) 100%);
}
.work-card3d .title-layer {
  position: absolute;
  inset: auto 0 0 0;
  z-index: 3;
  padding: 22px 22px 20px;
  transform: translateZ(40px);
  transition: transform .6s var(--ease);
}
.work-card3d:hover .title-layer { transform: translateZ(70px); }
.work-card3d .tags-layer { transform: translateZ(30px); }
.work-card3d .icon-layer {
  position: absolute;
  top: 16px; right: 16px;
  z-index: 5;
  width: 44px; height: 44px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  color: #fff;
  transform: translateZ(60px);
  opacity: 0;
  transition: opacity .4s, transform .6s var(--ease);
}
.work-card3d:hover .icon-layer { opacity: 1; transform: translateZ(90px); }
.work-card3d .icon-layer svg { width: 18px; height: 18px; }

/* 高光扫过 */
.work-card3d::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  background: linear-gradient(120deg, transparent 30%, rgba(255,255,255,.14) 50%, transparent 70%);
  transform: translateX(-120%);
  transition: transform .9s var(--ease);
  pointer-events: none;
}
.work-card3d:hover::after { transform: translateX(120%); }

/* 外发光（hover 全息感） */
.work-card3d.tilt-active {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.08),
    0 24px 70px rgba(0,0,0,.35),
    0 0 0 1px rgba(139,124,255,.22),
    0 0 44px rgba(139,124,255,.22);
}

/* 悬浮呼吸动画 */
.float-y { animation: floatY 7s ease-in-out infinite; }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}
.float-y-slow { animation: floatY 11s ease-in-out infinite; }

/* ---------- 视角倾斜（JS tilt 控件用） ---------- */
.tilt-el { transition: transform .35s var(--ease); will-change: transform; }
.tilt-el.tilt-strong { transition: transform .55s var(--ease); }

/* ---------- 镜头式页面切换（透镜遮罩） ---------- */
.lens-transition {
  position: fixed;
  inset: 0;
  z-index: 2000;
  pointer-events: none;
  visibility: hidden;
}
.lens-transition .lens-fill {
  position: absolute;
  border-radius: 50%;
  background: radial-gradient(circle, var(--bg) 40%, rgba(124,108,255,.4) 70%, rgba(84,225,255,.28) 90%, rgba(11,11,13,.5) 100%);
  box-shadow: 0 0 120px 40px rgba(124,108,255,.35), inset 0 0 60px rgba(84,225,255,.25);
  top: var(--ly, 50%);
  left: var(--lx, 50%);
  width: var(--ls, 0px);
  height: var(--ls, 0px);
  transform: translate(-50%, -50%);
  transition: width .9s var(--ease-in-out), height .9s var(--ease-in-out);
}
.lens-transition.is-enter { visibility: visible; }
.lens-transition.is-enter .lens-fill {
  width: var(--ls-max, 260vmax);
  height: var(--ls-max, 260vmax);
}

/* 页面进入时轻微缩放呼吸 */
body.page-enter .site-wrap { animation: pageIn .8s var(--ease-out) both; }
@keyframes pageIn {
  from { opacity: 0; transform: translateZ(-40px) scale(.985); filter: blur(6px); }
  to   { opacity: 1; transform: none; filter: none; }
}

/* ---------- 沉浸模式 ---------- */
html.immersive .site-header,
html.immersive .site-footer,
html.immersive .back-link,
html.immersive #to-top { display: none !important; }
html.immersive .site-wrap { padding-top: 0 !important; }
html.immersive .scene3d { perspective: 2200px; }

.exit-immersive {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 300;
  display: none;
}
html.immersive .exit-immersive { display: inline-flex; }

/* ---------- 深度指示器 ---------- */
.depth-hud {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: .62rem;
  letter-spacing: .3em;
  color: var(--text-3);
  text-transform: uppercase;
}
.depth-hud .depth-track {
  width: 3px;
  height: 60px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
  position: relative;
}
.depth-hud .depth-track i {
  position: absolute;
  inset: 0 0 auto 0;
  height: 40%;
  background: var(--neon-grad);
  border-radius: 3px;
  transition: transform .2s linear;
}

/* ---------- 自定义光标 ---------- */
.vr-cursor {
  position: fixed;
  top: 0; left: 0;
  z-index: 3000;
  pointer-events: none;
  border-radius: 50%;
  will-change: transform;
}
.vr-cursor-dot {
  width: 6px; height: 6px;
  background: var(--neon);
  box-shadow: var(--glow-accent);
}
.vr-cursor-ring {
  width: 34px; height: 34px;
  border: 1.5px solid rgba(139,124,255,.7);
  transition: width .25s, height .25s, border-color .25s, background .25s;
}
.vr-cursor-ring.is-down { width: 22px; height: 22px; }
.vr-cursor-ring.is-hover {
  width: 52px; height: 52px;
  background: rgba(139,124,255,.08);
  border-color: var(--neon-2);
}
html.has-cursor, html.has-cursor body { cursor: none; }
html.has-cursor a, html.has-cursor button, html.has-cursor input,
html.has-cursor textarea, html.has-cursor select { cursor: none; }

/* 触屏/减弱动效时不显示自定义光标 */
@media (pointer: coarse), (prefers-reduced-motion: reduce) {
  .vr-cursor, .depth-hud { display: none !important; }
  .lens-transition .lens-fill { transition: none; }
}