/* ============================================================
 * YITONG 一通线艺 · 多页面扩展层 (pages.css)
 * ------------------------------------------------------------
 *  只新增、不覆盖：沿用 cinematic.css 的变量与组件，
 *  补充 ①顶部导航（分类页 + 资源下拉）②左侧竖向滚动进度轨道
 *  ③悬浮邮件球 ④子页面通用版式。
 * ============================================================ */

/* ============================================================
 *  1. 顶部导航：多页面 + 资源下拉
 * ============================================================ */

/* 子页面没有开场视频，导航直接常驻 */
body.page-sub .site-nav { opacity: 1; transform: none; }

.nav-item { position: relative; }
.nav-item > summary,
.nav-trigger {
  list-style: none;
  cursor: pointer;
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--ink-soft);
  position: relative;
  padding: 4px 18px 4px 0;
  background: none;
  border: 0;
  transition: color .3s var(--ease);
}
.nav-item > summary::-webkit-details-marker { display: none; }
.nav-item > summary::before,
.nav-trigger::after {
  content: '';
  position: absolute;
  right: 2px;
  top: 50%;
  width: 5px; height: 5px;
  margin-top: -3px;
  border-right: 1.4px solid currentColor;
  border-bottom: 1.4px solid currentColor;
  transform: rotate(45deg);
  opacity: .55;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-item.open > summary::before,
.nav-item.open .nav-trigger::after { transform: rotate(-135deg); opacity: 1; }

.nav-item > summary::after,
.nav-trigger::after {
  content: '';
  position: absolute;
  left: 0; right: 18px; bottom: -2px;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s var(--ease);
}
.nav-item > summary:hover::after,
.nav-item.active > summary::after,
.nav-trigger:hover::after,
.nav-item.active .nav-trigger::after { transform: scaleX(1); }
.nav-item.active > summary,
.nav-item.active .nav-trigger { color: var(--brand-soft); }

/* 下拉面板：与导航同一套深底玻璃质感 */
.nav-menu {
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  min-width: 186px;
  padding: 8px;
  border-radius: 10px;
  background: rgba(8, 12, 18, .92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid rgba(255, 255, 255, .10);
  box-shadow: var(--shadow-3);
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-8px);
  transition: opacity .28s var(--ease), transform .28s var(--ease), visibility .28s;
  z-index: 5;
}
.nav-item:hover .nav-menu,
.nav-item.open .nav-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.nav-menu::before {           /* 隐形桥接区，防止移动时闪断 */
  content: '';
  position: absolute;
  left: 0; right: 0; top: -16px;
  height: 16px;
}
.nav-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 6px;
  font-size: 13.5px;
  color: var(--ink-soft);
  white-space: nowrap;
  transition: background .25s var(--ease), color .25s var(--ease);
}
.nav-menu a:hover,
.nav-menu a.active {
  background: rgba(59, 130, 246, .14);
  color: var(--brand-soft);
}
.nav-menu a i {
  width: 16px;
  font-style: normal;
  font-size: 12px;
  opacity: .7;
  text-align: center;
}

/* 移动端：断点与原站导航抽屉保持一致（720px），抽屉内下拉改为内嵌 */
@media (max-width: 720px) {
  .nav-item > summary::before { display: none; }
  .nav-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    min-width: 0;
    margin-top: 6px;
    background: rgba(255, 255, 255, .04);
    box-shadow: none;
    display: none;
  }
  .nav-item.open .nav-menu { display: block; }
}

/* ============================================================
 *  2. 左侧竖向滚动进度轨道
 * ============================================================ */
.rail {
  position: fixed;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 40;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .8s var(--ease);
}
body.hero-active .rail,
body.home-active .rail,
body.page-sub .rail { opacity: 1; pointer-events: auto; }

.rail-pct {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--ink-mute);
  font-variant-numeric: tabular-nums;
  transition: color .3s var(--ease);
}
.rail-pct.on { color: var(--brand-soft); }

.rail-line {
  position: relative;
  width: 2px;
  height: clamp(140px, 26vh, 240px);
  background: rgba(255, 255, 255, .12);
  border-radius: 2px;
}
.rail-fill {
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 0%;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--brand-soft) 0%, var(--brand) 100%);
  box-shadow: 0 0 12px rgba(59, 130, 246, .55);
}
.rail-fill::after {          /* 光点：进度头部 */
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 6px; height: 6px;
  margin-left: -3px;
  margin-bottom: -3px;
  border-radius: 50%;
  background: var(--brand-soft);
  box-shadow: 0 0 10px var(--brand);
}

.rail-dot {
  position: absolute;
  left: 50%;
  width: 8px; height: 8px;
  margin-left: -4px;
  margin-top: -4px;
  border-radius: 50%;
  background: #0d1420;
  border: 1px solid rgba(255, 255, 255, .28);
  cursor: pointer;
  transition: background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}
.rail-dot:hover { transform: scale(1.35); border-color: var(--brand); }
.rail-dot.on {
  background: var(--brand);
  border-color: var(--brand);
  box-shadow: 0 0 10px rgba(59, 130, 246, .8);
}
.rail-dot span {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%) translateX(-6px);
  padding: 5px 10px;
  border-radius: 6px;
  background: rgba(8, 12, 18, .94);
  border: 1px solid rgba(255, 255, 255, .10);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--ink);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease), transform .25s var(--ease);
}
.rail-dot:hover span { opacity: 1; transform: translateY(-50%) translateX(0); }
.rail-dot.on span { opacity: .55; transform: translateY(-50%) translateX(0); }

.rail-label {
  writing-mode: vertical-rl;
  font-size: 10px;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--ink-mute);
  opacity: .55;
}
@media (max-width: 1180px) { .rail { display: none; } }

/* ============================================================
 *  3. 悬浮球 + 邮件联系卡片
 * ============================================================ */
.fab {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 54px;
  height: 54px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 50%;
  background: linear-gradient(140deg, var(--brand) 0%, var(--brand-deep) 100%);
  box-shadow: 0 12px 32px rgba(59, 130, 246, .38), 0 2px 8px rgba(0, 0, 0, .4);
  color: #fff;
  display: grid;
  place-items: center;
  z-index: 60;
  opacity: 0;
  transform: translateY(14px) scale(.9);
  transition: opacity .7s var(--ease), transform .7s var(--ease), box-shadow .3s var(--ease);
}
body.hero-active .fab,
body.home-active .fab,
body.page-sub .fab { opacity: 1; transform: none; }
.fab:hover { box-shadow: 0 16px 40px rgba(59, 130, 246, .55), 0 2px 8px rgba(0, 0, 0, .4); }
.fab.open { background: linear-gradient(140deg, var(--brand-deep) 0%, #12233d 100%); }
.fab svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.fab .ico-close { display: none; }
.fab.open .ico-mail { display: none; }
.fab.open .ico-close { display: block; }
.fab::after {                 /* 呼吸光环 */
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(59, 130, 246, .45);
  animation: fabPulse 2.6s infinite var(--ease);
}
@keyframes fabPulse {
  0%   { transform: scale(.92); opacity: .9; }
  70%  { transform: scale(1.25); opacity: 0; }
  100% { transform: scale(1.25); opacity: 0; }
}

.mail-card {
  position: fixed;
  right: 26px;
  bottom: 92px;
  width: 336px;
  max-width: calc(100vw - 52px);
  padding: 22px;
  border-radius: 14px;
  background: rgba(9, 13, 20, .88);
  backdrop-filter: blur(22px) saturate(1.2);
  -webkit-backdrop-filter: blur(22px) saturate(1.2);
  border: 1px solid rgba(255, 255, 255, .12);
  box-shadow: var(--shadow-3);
  z-index: 59;
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px) scale(.96);
  transform-origin: bottom right;
  transition: opacity .35s var(--ease), transform .35s var(--ease), visibility .35s;
}
.mail-card.open { opacity: 1; visibility: visible; transform: none; }

.mail-card h6 {
  margin: 0 0 4px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink);
}
.mail-card .mc-sub {
  margin: 0 0 16px;
  font-size: 12px;
  color: var(--ink-mute);
  line-height: 1.6;
}
.mc-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}
.mc-row .k {
  flex: 0 0 46px;
  font-size: 10px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--ink-mute);
}
.mc-row .v {
  flex: 1;
  font-size: 13.5px;
  color: var(--ink);
  word-break: break-all;
}
.mc-row .copy {
  flex: 0 0 auto;
  padding: 4px 9px;
  font-size: 11px;
  border-radius: 5px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, .04);
  color: var(--ink-soft);
  transition: all .25s var(--ease);
}
.mc-row .copy:hover { border-color: var(--brand); color: var(--brand-soft); }
.mc-row .copy.done { border-color: var(--brand); color: var(--brand); background: rgba(59, 130, 246, .16); }
.mc-acts { margin-top: 16px; display: flex; gap: 8px; }
.mc-acts .btn { flex: 1; justify-content: center; padding: 11px 14px; font-size: 13px; }

/* ============================================================
 *  5. 粒子特效背景层（真实 mp4 粒子视频，全站统一氛围背景）
 *  素材：media/particles-bg.mp4（1280×720 / 30s 无缝循环）
 *  结构：body 下固定一个 <video class="particles-bg">，
 *        层级 背景视频(-2) < 内容深色底(-1/内容之上) ，文字在其上可读。
 *  - 子页(body.page-sub)：首帧即播放铺底
 *  - 首页(body 无 page-sub)：intro 开场期间隐藏，reveal/finalize 后淡入
 * ============================================================ */

/* 全站统一的粒子背景视频层（放在 body 首层，铺在内容之下） */
.particles-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;               /* 1280×720 → 铺满任意屏比 */
  z-index: -2;                     /* 内容 z ≥ 0 之上；粒子下再垫一层纯黑防漏 */
  opacity: 0;
  pointer-events: none;
  will-change: opacity;
}
/* 视频下方垫纯黑，避免极少数全透明瞬间露出文档白底 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -3;
  background: #07090d;
}

/* ---- 子页：进入即淡入粒子背景 ---- */
body.page-sub .particles-bg {
  opacity: 1;
}

/* ---- 首页：hero 全屏循环 intro；滚过 hero 后 particles 接棒 ---- */
/* particles ready under looping intro; visible as intro fades on home-active */
body.home-active .particles-bg,
body.hero-active .particles-bg,
body.scrolled-past-hero .particles-bg {
  opacity: 1;
  transition: opacity 0.55s cubic-bezier(.22, 1, .36, 1);
}

/* v7: hero-active alone keeps #intro full-bleed looping — do NOT fade yet */
body.hero-active:not(.home-active):not(.scrolled-past-hero) #intro {
  opacity: 1;
  pointer-events: none;
  transition: opacity 0.55s cubic-bezier(.22, 1, .36, 1);
}

/* 滚过 hero：#intro 快速淡出，particles-bg 承接 */
body.home-active #intro,
body.scrolled-past-hero #intro {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.55s cubic-bezier(.22, 1, .36, 1);
}
body.home-active #intro.bg-layer,
body.scrolled-past-hero #intro.bg-layer { z-index: -1; }

/* 粒子底遮罩：仅首屏全透明；滚过首屏后与其他章节统一压暗，保证文字可读 */
.particles-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(110% 80% at 50% 6%, rgba(255,255,255,0) 0%, rgba(5,8,12,.22) 72%, rgba(5,8,12,.42) 100%),
    linear-gradient(180deg, rgba(5,8,12,.18) 0%, rgba(5,8,12,.32) 100%);
  opacity: 1;
  pointer-events: none;
  transition: opacity 0.55s cubic-bezier(.22, 1, .36, 1);
}
/* 第一屏：遮罩完全透明（开屏视频 / hero 清晰） */
body.hero-active:not(.scrolled-past-hero):not(.home-active) .particles-bg::after,
body.showcase-active .particles-bg::after {
  opacity: 0;
  background: none;
}

/* 末帧定格帧逻辑：freeze 阶段仍显示 intro-final(定格)，home-active 后整个 intro 淡出让位给粒子视频 */

/* 章节底：交给 premium 玻璃段统一；这里不再强制全透明 */
section { background: transparent; } /* base; premium glass overrides when past hero */
.site-footer { background: transparent; }

/* 首页 hero 前的细腻暗角遮罩：随"放弃暗色遮罩"移除，改为极轻的渐变环境感 */
.hero::before {
  background: linear-gradient(180deg,
    rgba(7,9,13,0) 0%,
    rgba(7,9,13,0) 55%,
    rgba(5,8,12,.30) 100%);
}

@media (prefers-reduced-motion: reduce) {
  .particles-bg { opacity: 0 !important; }
  .particles-bg::after { display: none; }
}

/* ============================================================
 *  4. 子页面通用版式
 * ============================================================ */
.page-hero {
  position: relative;
  padding: 148px 0 56px;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: -180px; left: 50%;
  width: 900px; height: 480px;
  transform: translateX(-50%);
  background: radial-gradient(ellipse at center, rgba(59, 130, 246, .18) 0%, rgba(59, 130, 246, 0) 68%);
  pointer-events: none;
}
.page-hero::after {
  content: '';
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .12) 30%, rgba(255, 255, 255, .12) 70%, transparent);
}
.crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-mute);
  margin-bottom: 18px;
}
.crumb a:hover { color: var(--brand-soft); }
.crumb i { font-style: normal; opacity: .5; }
.crumb b { color: var(--brand-soft); font-weight: 600; }

.page-hero h1 {
  margin: 0 0 16px;
  font-family: 'Barlow Condensed', 'Noto Sans SC', sans-serif;
  font-size: clamp(36px, 5.6vw, 68px);
  font-weight: 700;
  line-height: 1.06;
  letter-spacing: .01em;
}
.page-hero h1 em { font-style: normal; color: var(--brand); }
.page-hero .lead {
  max-width: 720px;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* 章节头部的「查看详情」入口（首页 → 分类页） */
.section-more { margin-top: 26px; }
.section-more .btn { display: inline-flex; align-items: center; }

/* 通用内容栅格 */
.grid-2, .grid-3, .grid-4 {
  display: grid;
  gap: 22px;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.pcard {
  position: relative;
  padding: 26px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .03);
  border: 1px solid var(--line);
  transition: transform .5s var(--ease), border-color .5s var(--ease), background .5s var(--ease);
}
.pcard:hover {
  transform: translateY(-4px);
  border-color: rgba(59, 130, 246, .38);
  background: rgba(59, 130, 246, .06);
}
.pcard .n {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--brand);
  margin-bottom: 12px;
}
.pcard h4 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}
.pcard p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--ink-mute);
}
.pcard .tags { margin-top: 14px; display: flex; flex-wrap: wrap; gap: 6px; }
.pcard .tags span {
  padding: 4px 9px;
  border-radius: 4px;
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--line);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-soft);
}

/* 数据条 */
.stat-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 780px) { .stat-row { grid-template-columns: repeat(2, 1fr); } }
.stat-row .cell { padding: 22px 20px; border-radius: 10px; background: rgba(255, 255, 255, .03); border: 1px solid var(--line); }
.stat-row .v {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--brand);
}
.stat-row .v small { font-size: 20px; }
.stat-row .k { margin-top: 8px; font-size: 12.5px; letter-spacing: .1em; color: var(--ink-mute); }

/* 规格表 */
.spec-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.spec-table th, .spec-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}
.spec-table th {
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-mute);
  font-weight: 600;
}
.spec-table td { color: var(--ink-soft); }
.spec-table tbody tr:hover { background: rgba(59, 130, 246, .06); }
.spec-table td:first-child { color: var(--ink); font-weight: 500; }

/* 章节内小标题 */
.sub-head { margin: 0 0 26px; }
.sub-head h3 {
  margin: 0 0 8px;
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .02em;
}
.sub-head p { margin: 0; font-size: 13.5px; color: var(--ink-mute); }

/* 下一站 / 页面间导航 */
.pager {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 8px;
}
@media (max-width: 780px) { .pager { grid-template-columns: 1fr; } }
.pager a {
  padding: 20px 22px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .03);
  transition: all .4s var(--ease);
}
.pager a:hover { border-color: var(--brand); background: rgba(59, 130, 246, .08); transform: translateY(-3px); }
.pager a small { display: block; font-size: 10.5px; letter-spacing: .2em; color: var(--ink-mute); margin-bottom: 6px; }
.pager a strong { font-size: 15px; font-weight: 600; color: var(--ink); }

/* 空态占位（素材待补） */
.placeholder-box {
  display: grid;
  place-items: center;
  min-height: 200px;
  border: 1px dashed rgba(255, 255, 255, .16);
  border-radius: 12px;
  background: rgba(255, 255, 255, .02);
  color: var(--ink-mute);
  font-size: 13px;
  letter-spacing: .06em;
  text-align: center;
  padding: 24px;
}

/* ============================================================
 *  6. 页面转场（无帘子：内容淡出 → 新内容从左右两侧进入）
 * ------------------------------------------------------------
 *  离场：整页内容快速淡出（无任何遮挡板/帘子）
 *  进场：新页首帧由纯色 veil 盖住加载空隙（瞬间、非帘子动画），
 *        veil 淡出，同时新内容各 section 错峰从左右两侧滑入
 * ============================================================ */

/* ---- 全屏转场 veil（head 内联注入，仅作为加载期防闪；非帘子） ---- */
#pg-veil {
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  background: #05070b;
  opacity: 1;                       /* 转场进入时首帧不透明遮挡加载空隙 */
  pointer-events: none;
  transition: opacity .3s ease;     /* 淡出用 */
}
#pg-veil.out { opacity: 0; }

/* ---- ① 离场：整页内容淡出（无帘子） ---- */
body.pg-leave { overflow: hidden; }
body.pg-leave .site-nav,
body.pg-leave .page-hero,
body.pg-leave section,
body.pg-leave .site-footer,
body.pg-leave .rail,
body.pg-leave .fab,
body.pg-leave .mail-card {
  opacity: 0;
  transition: opacity .28s ease;
}
body.pg-leave #intro { opacity: 0 !important; transition: opacity .28s ease; }

/* ---- ② 进场：veil 淡出，同时新内容从左右两侧错峰进入 ---- */
body.pg-enter { overflow: hidden; }

/* veil 淡出（0.3s），露出底下新内容 */
body.pg-enter #pg-veil { opacity: 0; }

/* 新内容各 section 从下方/左右两侧浮现 —— 无帘子，纯内容动效 */
body.page-sub.pg-enter .page-hero { animation: pgUp .55s cubic-bezier(.22,1,.36,1) both; }
body.page-sub.pg-enter section    { animation: pgUp .55s cubic-bezier(.22,1,.36,1) both; }
body.page-sub.pg-enter section > .container > *:nth-child(odd)  { animation: pgFromL .55s cubic-bezier(.22,1,.36,1) both; }
body.page-sub.pg-enter section > .container > *:nth-child(even) { animation: pgFromR .55s cubic-bezier(.22,1,.36,1) both; }
body.page-sub.pg-enter section:nth-of-type(1) > .container > * { animation-delay: .08s; }
body.page-sub.pg-enter section:nth-of-type(2) > .container > * { animation-delay: .16s; }
body.page-sub.pg-enter section:nth-of-type(3) > .container > * { animation-delay: .24s; }
body.page-sub.pg-enter section:nth-of-type(4) > .container > * { animation-delay: .32s; }
body.page-sub.pg-enter section:nth-of-type(5) > .container > * { animation-delay: .40s; }
/* 动画起点即 opacity 0，避免入场前内容闪现 */
body.page-sub.pg-enter .page-hero,
body.page-sub.pg-enter section,
body.page-sub.pg-enter section > .container > * { opacity: 0; }
@keyframes pgUp    { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: none; } }
@keyframes pgFromL { from { opacity: 0; transform: translateX(-26px); } to { opacity: 1; transform: none; } }
@keyframes pgFromR { from { opacity: 0; transform: translateX(26px); } to { opacity: 1; transform: none; } }

body.pg-lock { overflow: hidden; }

@media (prefers-reduced-motion: reduce) {
  #pg-veil,
  body.pg-leave *,
  body.pg-enter * {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}

/* ============================================================
 *  7. 液态玻璃系统（Liquid Glass · 深色 frosted 版）
 * ------------------------------------------------------------
 *  放弃暗色遮罩 → 粒子视频以原生通透亮度全程流动；
 *  所有承载元素改为「半透明液态玻璃」：
 *    · 半透明白渐变底（偏深色 frosted，粒子在玻璃后透出流动）
 *    · backdrop-filter: blur + saturate（粒子被玻璃折射、柔化）
 *    · 顶部细高光缘 + 内阴影 → 液态厚度
 *    · 更大圆角、更柔投影
 *  本层置于 pages.css 末尾，覆盖 cinematic.css 同名组件。
 * ============================================================ */
:root {
  /* 玻璃面板（深色粒子之上，模拟微光 frosted 玻璃） */
  --g1:        linear-gradient(165deg, rgba(255,255,255,.085), rgba(255,255,255,.02));
  --g1-hover:  linear-gradient(165deg, rgba(255,255,255,.13),  rgba(255,255,255,.04));
  --g-border:  rgba(255,255,255,.14);
  --g-border-hi: rgba(255,255,255,.30);
  --g-blur:    blur(18px) saturate(150%);
  --g-blur-sm: blur(12px) saturate(150%);
  --g-rad:     16px;
  --g-rad-sm:  12px;
  /* 玻璃质感：外投影 + 顶部内高光缘（液态） */
  --g-shadow:  0 18px 48px rgba(0,0,0,.35), 0 4px 14px rgba(0,0,0,.22),
               inset 0 1px 0 rgba(255,255,255,.20);
  --g-shadow-hover: 0 26px 60px rgba(0,0,0,.42), 0 8px 22px rgba(0,0,0,.26),
               inset 0 1px 0 rgba(255,255,255,.32);
}

/* ---------- 通用玻璃基元 ---------- */
/* 供手动调用：给任意块套液态玻璃 */
.lg {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border: 1px solid var(--g-border);
  border-radius: var(--g-rad);
  box-shadow: var(--g-shadow);
}
.lg-hover:hover {
  background: var(--g1-hover);
  border-color: var(--g-border-hi);
  box-shadow: var(--g-shadow-hover);
}

/* ============================================================
 *  首页组件液态玻璃化
 * ============================================================ */

/* 首屏 hero 标题区：给标题/副标题/按钮一块收窄的玻璃带，
   粒子在其后清晰流动（替代原来的整屏暗角遮罩） */
.hero-title,
.hero-sub,
.hero-actions {
  position: relative;
  z-index: 3;
}
/* hero 标题与副标题各自半透明玻璃，制造"文字浮在玻璃上"的层次 */
.hero-title { text-shadow: 0 2px 24px rgba(0,0,0,.45); }
.hero-sub {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur-sm);
  backdrop-filter: var(--g-blur-sm);
  border: 1px solid var(--g-border);
  border-radius: 999px;
  box-shadow: 0 8px 28px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.18);
  padding: 14px 24px;
  max-width: 720px;
}

/* 产品卡：从深色实底 → 玻璃（图片区保留，body 区玻璃化于其下） */
.product-card {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border-color: var(--g-border);
  border-radius: var(--g-rad);
  box-shadow: var(--g-shadow);
}
.product-card:hover {
  background: var(--g1-hover);
  border-color: var(--brand);
  box-shadow: var(--g-shadow-hover);
}
.product-card .body { background: transparent; }
.product-card .img { background: rgba(10,14,20,.35); }

/* Quality 品质卡 */
.quality-card {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border-color: var(--g-border);
  border-radius: var(--g-rad);
  box-shadow: var(--g-shadow);
}
.quality-card:hover {
  background: var(--g1-hover);
  border-color: var(--brand);
  box-shadow: var(--g-shadow-hover);
}

/* App 应用领域卡 */
.app-card {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border-color: var(--g-border);
  border-radius: var(--g-rad);
  box-shadow: var(--g-shadow);
}
.app-card:hover {
  background: var(--g1-hover);
  border-color: var(--g-border-hi);
  box-shadow: var(--g-shadow-hover);
}

/* About 段配图角的悬浮徽章 / 数据背板 */
.about-media { background: rgba(10,14,20,.30); border-radius: var(--g-rad); }
.about-media .badge {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border: 1px solid var(--g-border);
  border-left: 3px solid var(--brand);
  border-radius: var(--g-rad-sm);
  box-shadow: var(--g-shadow);
}
.about-stats { border-top-color: var(--g-border); }
.about-stats .item .v { text-shadow: 0 2px 16px rgba(0,0,0,.4); }

/* section 标题行：为直浮在粒子上的大标题加一道极轻的玻璃晕 */
.section-head {
  position: relative;
  z-index: 2;
}
.section-title { text-shadow: 0 2px 26px rgba(0,0,0,.5); }

/* ============================================================
 *  导航 / 页脚 / 邮件球 液态玻璃化
 * ============================================================ */

/* 顶栏：默认全透明；滚动后 frosted（body.nav-solid / .is-solid） */
.site-nav {
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
  border-bottom: 1px solid transparent;
  transition: background .55s cubic-bezier(.22, 1, .36, 1), backdrop-filter .55s cubic-bezier(.22, 1, .36, 1), -webkit-backdrop-filter .55s cubic-bezier(.22, 1, .36, 1), box-shadow .55s cubic-bezier(.22, 1, .36, 1), border-color .55s cubic-bezier(.22, 1, .36, 1);
}
body.page-sub .site-nav {
  background: linear-gradient(180deg, rgba(8,12,18,.50) 0%, rgba(8,12,18,0) 100%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
}
body.nav-solid .site-nav,
.site-nav.is-solid {
  background: rgba(8, 12, 18, 0.52);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom-color: rgba(255, 255, 255, 0.06);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
}

/* 导航下拉：深色底 → 玻璃浮层 */
.nav-menu {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border-color: var(--g-border);
  border-radius: 14px;
  box-shadow: var(--g-shadow);
}
.nav-menu a:hover,
.nav-menu a.active {
  background: rgba(59,130,246,.20);
}

/* 悬浮邮件球 FAB：玻璃胶囊 */
.fab {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur-sm);
  backdrop-filter: var(--g-blur-sm);
  border: 1px solid var(--g-border);
  box-shadow: 0 12px 30px rgba(0,0,0,.35), inset 0 1px 0 rgba(255,255,255,.25);
}
.fab:hover {
  background: var(--g1-hover);
  border-color: rgba(59,130,246,.6);
  box-shadow: 0 18px 44px rgba(59,130,246,.45), inset 0 1px 0 rgba(255,255,255,.35);
}

/* 邮件卡：玻璃弹层 */
.mail-card {
  background: linear-gradient(168deg, rgba(20,26,36,.72), rgba(10,14,20,.58));
  -webkit-backdrop-filter: blur(24px) saturate(160%);
  backdrop-filter: blur(24px) saturate(160%);
  border: 1px solid var(--g-border);
  border-radius: 18px;
  box-shadow: 0 28px 70px rgba(0,0,0,.5), inset 0 1px 0 rgba(255,255,255,.18);
}
.mail-card .mc-row,
.mail-card h6 { text-shadow: 0 1px 8px rgba(0,0,0,.5); }

/* 页脚：深色实底 → 半透明玻璃面板 */
.site-footer {
  background: linear-gradient(180deg, rgba(6,9,14,.45), rgba(6,9,14,.15));
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  backdrop-filter: blur(16px) saturate(150%);
  border-top: 1px solid var(--g-border);
}

/* ============================================================
 *  子页组件 液态玻璃化
 * ============================================================ */

/* 子页 hero 区：标题/面包屑加大字号深色投影，lead 收窄玻璃副标 */
.page-hero { text-shadow: none; }
.page-hero h1 { text-shadow: 0 3px 28px rgba(0,0,0,.55); }
.page-hero .lead {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur-sm);
  backdrop-filter: var(--g-blur-sm);
  border: 1px solid var(--g-border);
  border-radius: 14px;
  box-shadow: 0 10px 30px rgba(0,0,0,.26), inset 0 1px 0 rgba(255,255,255,.16);
  padding: 18px 22px;
}

/* 内容/产品特性卡 pcard */
.pcard {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border-color: var(--g-border);
  border-radius: var(--g-rad);
  box-shadow: var(--g-shadow);
}
.pcard:hover {
  background: var(--g1-hover);
  border-color: rgba(59,130,246,.55);
  box-shadow: var(--g-shadow-hover);
}
.pcard .tags span {
  background: rgba(255,255,255,.07);
  border-color: rgba(255,255,255,.14);
  -webkit-backdrop-filter: var(--g-blur-sm);
  backdrop-filter: var(--g-blur-sm);
}

/* 数据条 stat */
.stat-row .cell {
  background: var(--g1);
  -webkit-backdrop-filter: var(--g-blur);
  backdrop-filter: var(--g-blur);
  border: 1px solid var(--g-border);
  border-radius: var(--g-rad);
  box-shadow: var(--g-shadow);
}

/* 规格表：整表放进玻璃，行分隔透明化 */
.spec-table { text-shadow: 0 1px 6px rgba(0,0,0,.4); }
.spec-table th, .spec-table td { border-color: rgba(255,255,255,.10); }

/* 表单：玻璃输入框 */
.contact-form input,
.contact-form textarea,
.contact-form select {
  background: rgba(255,255,255,.06);
  -webkit-backdrop-filter: var(--g-blur-sm);
  backdrop-filter: var(--g-blur-sm);
  border-color: rgba(255,255,255,.14);
}
.contact-form input:focus,
.contact-form textarea:focus,
.contact-form select:focus {
  background: rgba(255,255,255,.10);
  border-color: var(--brand);
}

/* 关于/联系页信息列表项悬浮玻璃底 */
.contact-info-item { border-bottom-color: rgba(255,255,255,.10); }

/* 通用按钮也可强调玻璃呼吸 */
.btn { box-shadow: 0 6px 20px rgba(0,0,0,.25), inset 0 1px 0 rgba(255,255,255,.18); }
.btn-primary { box-shadow: 0 10px 28px rgba(59,130,246,.35), inset 0 1px 0 rgba(255,255,255,.22); }

@media (max-width: 720px) {
  /* 移动抽屉内下拉无需外玻璃，改用浅内嵌 */
  .nav-menu { background: rgba(255,255,255,.05); box-shadow: none; }
}





/* v11.5: rail removed — hide any leftover markup */
.rail { display: none !important; opacity: 0 !important; pointer-events: none !important; }