/* 飞翎官网 · 设计系统 v2（电影感深色 + 影棚浅色展台）
 * 原则：大画面、大字、少边框；信号青只做点缀；产品用真实影像在浅色展台呈现。
 */
@font-face { font-family: "Space Grotesk"; src: url("../fonts/SpaceGrotesk-300_700.woff2") format("woff2"); font-weight: 300 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("../fonts/JetBrainsMono-400.woff2") format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("../fonts/JetBrainsMono-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }

:root {
  --bg: #05080d;
  --bg-2: #090e16;
  --surface: #0e141e;
  --surface-2: #131b27;
  --line: rgba(160, 190, 220, .16);
  --line-2: rgba(160, 190, 220, .32);
  --text: #eef2f7;
  --text-2: #cdd6e1;
  --text-3: #a4b1c3;
  --signal: #4de1ff;
  --signal-2: #2f7bff;
  --gold: #d8b57a;
  --red: #ff5a5f;
  --studio: #e4e7eb;
  --studio-2: #f2f4f6;
  --ink: #0b1018;
  --ink-2: #3a4454;
  --ink-3: #5b6575;

  --sans: "Space Grotesk", "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  --ease: cubic-bezier(.16, 1, .3, 1);
  --wrap: 1280px;
  --gutter: clamp(20px, 5vw, 80px);
  --radius: 20px;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 18px/1.75 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, video, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
:focus-visible { outline: 2px solid var(--signal); outline-offset: 3px; border-radius: 6px; }
::selection { background: rgba(77, 225, 255, .3); }

.wrap { width: 100%; max-width: calc(var(--wrap) + var(--gutter) * 2); margin: 0 auto; padding: 0 var(--gutter); }
.num { font-family: var(--sans); font-variant-numeric: tabular-nums; letter-spacing: -.02em; }
.mono { font-family: var(--mono); letter-spacing: .04em; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- 排版 ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 15px; font-weight: 500; letter-spacing: .18em; text-transform: uppercase;
  color: var(--text-2);
}
.eyebrow::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 12px var(--signal); }
.on-light .eyebrow { color: var(--ink-2); }
.on-light .eyebrow::before { background: #0a8fb0; box-shadow: none; }

.display {
  margin: 0; font-weight: 600; letter-spacing: -.03em; line-height: 1.04;
  font-size: clamp(44px, 7.4vw, 112px);
}
.h1 { margin: 0; font-weight: 600; letter-spacing: -.025em; line-height: 1.1; font-size: clamp(36px, 5vw, 72px); }
.h2 { margin: 0; font-weight: 600; letter-spacing: -.02em; line-height: 1.15; font-size: clamp(30px, 3.6vw, 52px); }
.h3 { margin: 0; font-weight: 600; letter-spacing: -.01em; line-height: 1.3; font-size: clamp(22px, 2vw, 28px); }
.lead { margin: 0; font-size: clamp(18px, 1.4vw, 21px); line-height: 1.75; color: var(--text-2); max-width: 40em; }
.muted { color: var(--text-2); }
.dim { color: var(--text-3); }
.on-light { color: var(--ink); }
.on-light .lead, .on-light .muted { color: var(--ink-2); }
.on-light .dim { color: var(--ink-3); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  height: 52px; padding: 0 28px; border-radius: 999px;
  font-size: 16px; font-weight: 500; letter-spacing: .01em; white-space: nowrap;
  transition: background .25s, color .25s, border-color .25s, transform .25s var(--ease);
}
.btn svg { width: 16px; height: 16px; transition: transform .25s var(--ease); }
.btn:hover svg { transform: translateX(3px); }
.btn--light { background: var(--text); color: var(--ink); }
.btn--light:hover { background: #fff; }
.btn--ghost { border: 1px solid rgba(238, 242, 247, .32); color: var(--text); }
.btn--ghost:hover { border-color: var(--text); background: rgba(255, 255, 255, .06); }
.btn--dark { background: var(--ink); color: #fff; }
.btn--dark:hover { background: #1b2433; }
.btn--sm { height: 40px; padding: 0 20px; font-size: 16px; }
.link {
  display: inline-flex; align-items: center; gap: 8px; font-weight: 500; color: var(--text);
  border-bottom: 1px solid transparent; transition: border-color .2s, gap .25s var(--ease);
}
.link:hover { border-color: currentColor; gap: 12px; }
.on-light .link { color: var(--ink); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto; z-index: 50; height: 76px;
  transition: background .35s, border-color .35s, backdrop-filter .35s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(5, 8, 13, .72); backdrop-filter: saturate(160%) blur(18px); -webkit-backdrop-filter: saturate(160%) blur(18px);
  border-color: var(--line);
}
.header-inner { height: 100%; display: flex; align-items: center; gap: 40px; }
.brand { display: flex; align-items: center; gap: 12px; flex: none; }
.brand img { width: 30px; height: 30px; }
.brand b { font-size: 19px; font-weight: 600; letter-spacing: .08em; }
.brand small { display: block; font-size: 10px; letter-spacing: .36em; color: var(--text-3); margin-top: -2px; }
.nav { display: flex; gap: 6px; margin: 0 auto; }
.nav a {
  position: relative; padding: 8px 14px; font-size: 16px; color: var(--text-2); border-radius: 999px;
  transition: color .2s, background .2s;
}
.nav a:hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.nav a[aria-current="page"] { color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 18px; flex: none; }
.header-actions .tel { font-size: 16px; color: var(--text-2); font-variant-numeric: tabular-nums; }
.menu-btn { display: none; width: 44px; height: 44px; border-radius: 50%; border: 1px solid var(--line-2); position: relative; }
.menu-btn span, .menu-btn span::before, .menu-btn span::after {
  position: absolute; left: 13px; width: 18px; height: 1.5px; background: var(--text); content: ""; transition: transform .3s var(--ease), top .3s;
}
.menu-btn span { top: 21px; }
.menu-btn span::before { left: 0; top: -6px; }
.menu-btn span::after { left: 0; top: 6px; }
.menu-open .menu-btn span { background: transparent; }
.menu-open .menu-btn span::before { top: 0; transform: rotate(45deg); }
.menu-open .menu-btn span::after { top: 0; transform: rotate(-45deg); }
.mobile-nav {
  position: fixed; inset: 76px 0 0; z-index: 49; background: rgba(5, 8, 13, .97); backdrop-filter: blur(20px);
  padding: 24px var(--gutter) 40px; display: flex; flex-direction: column; gap: 4px;
  opacity: 0; visibility: hidden; transform: translateY(-8px); transition: opacity .3s, transform .3s var(--ease), visibility .3s;
}
.menu-open .mobile-nav { opacity: 1; visibility: visible; transform: none; }
.mobile-nav a { font-size: 26px; font-weight: 600; padding: 12px 0; border-bottom: 1px solid var(--line); }
.mobile-nav .btn { margin-top: 24px; font-size: 16px; padding: 0 28px; border: 0; }

/* ---------- 首屏 ---------- */
.hero { position: relative; min-height: 100svh; display: flex; flex-direction: column; justify-content: flex-end; overflow: hidden; isolation: isolate; }
.hero-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background:
    linear-gradient(90deg, rgba(5, 8, 13, .94) 0%, rgba(5, 8, 13, .7) 34%, rgba(5, 8, 13, 0) 58%),
    linear-gradient(0deg, var(--bg) 0%, rgba(5, 8, 13, 0) 34%);
}
.hero-inner { padding-top: 140px; padding-bottom: clamp(48px, 8vh, 96px); }
.hero .eyebrow { margin-bottom: 28px; }
.hero .display span { display: block; }
.hero .display .soft { color: rgba(238, 242, 247, .5); }
.hero .lead { margin-top: 28px; max-width: 34em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 40px; }
.hero-foot {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: clamp(56px, 9vh, 104px);
  border-top: 1px solid var(--line-2);
}
.hero-foot div { padding: 22px 24px 0 0; }
.hero-foot b { display: block; font-size: clamp(26px, 2.6vw, 40px); font-weight: 500; line-height: 1.1; letter-spacing: -.02em; }
.hero-foot b sup { font-size: .45em; vertical-align: .9em; margin-left: 2px; color: var(--text-2); font-weight: 400; }
.hero-foot span { display: block; margin-top: 8px; font-size: 16px; color: var(--text-2); }

/* ---------- 区块 ---------- */
.section { position: relative; padding: clamp(96px, 13vw, 180px) 0; }
.section--tight { padding: clamp(72px, 9vw, 120px) 0; }
.section--studio { background: radial-gradient(90% 60% at 50% 0%, #102033 0%, #070c13 70%); color: var(--text); }
.section--deep { background: var(--bg-2); }
.sec-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: end; gap: 32px; margin-bottom: clamp(48px, 6vw, 88px); }
.sec-head .eyebrow { margin-bottom: 22px; }
.sec-head .lead { margin-top: 22px; }
.center { text-align: center; }
.center .lead { margin-left: auto; margin-right: auto; }

/* ---------- 宣言 ---------- */
.manifesto { font-size: clamp(28px, 3.4vw, 50px); line-height: 1.38; font-weight: 500; letter-spacing: -.015em; max-width: 22em; margin: 0; }
.manifesto .w { color: rgba(238, 242, 247, .18); transition: color .5s; }
.manifesto .w.on { color: var(--text); }
.manifesto em { font-style: normal; }

/* ---------- 产品展台（浅色） ---------- */
.stage-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.stage {
  position: relative; display: flex; flex-direction: column; overflow: hidden; border-radius: 28px;
  background: radial-gradient(80% 65% at 50% 55%, #1a2a3d 0%, #0c141f 60%, #080d15 100%); color: var(--text); min-height: 640px; isolation: isolate;
  box-shadow: inset 0 0 0 1px rgba(160, 190, 220, .14);
  transition: transform .6s var(--ease), box-shadow .6s var(--ease);
}
.stage:hover { transform: translateY(-4px); box-shadow: inset 0 0 0 1px rgba(77, 225, 255, .3), 0 40px 80px -40px rgba(0, 0, 0, .7); }
.stage-copy { position: relative; z-index: 2; padding: 44px 44px 0; }
.stage-copy .tag { font-size: 16px; letter-spacing: .12em; color: var(--signal); text-transform: uppercase; }
.stage-copy h3 { margin: 12px 0 0; font-size: clamp(30px, 2.8vw, 42px); font-weight: 600; letter-spacing: -.02em; line-height: 1.12; }
.stage-copy p { margin: 14px 0 0; color: var(--text-2); font-size: 18px; max-width: 26em; }
.stage-media { position: relative; flex: 1; display: flex; align-items: center; justify-content: center; margin-top: 8px; }
.stage-media img {
  width: 100%; max-width: 640px; object-fit: contain;
  -webkit-mask-image: radial-gradient(72% 72% at 50% 50%, #000 62%, transparent 100%);
          mask-image: radial-gradient(72% 72% at 50% 50%, #000 62%, transparent 100%);
  transition: transform 1.2s var(--ease);
}
.stage:hover .stage-media img { transform: scale(1.035); }
.stage-specs { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, 1fr); padding: 0 44px 40px; gap: 16px; }
.stage-specs div { border-top: 1px solid var(--line-2); padding-top: 14px; }
.stage-specs b { display: block; font-size: 26px; font-weight: 600; letter-spacing: -.02em; line-height: 1.1; }
.stage-specs span { display: block; margin-top: 6px; font-size: 16px; color: var(--text-2); }
.stage-badge {
  position: absolute; top: 44px; right: 44px; z-index: 2; display: inline-flex; align-items: center; gap: 8px;
  height: 34px; padding: 0 14px; border-radius: 999px; background: rgba(5, 8, 13, .6); backdrop-filter: blur(8px);
  font-size: 16px; color: var(--text-2); border: 1px solid var(--line-2);
}
.stage-badge i { width: 7px; height: 7px; border-radius: 50%; background: #18b37e; }
.stage-note { margin-top: 20px; font-size: 16px; color: var(--text-3); }

.soft-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 24px; margin-top: 24px; }
.soft-card {
  position: relative; overflow: hidden; border-radius: 28px; background: #0b1119; color: var(--text);
  display: grid; grid-template-rows: auto 1fr; min-height: 560px; isolation: isolate;
}
.soft-card .stage-copy p { color: var(--text-2); }
.soft-card .stage-copy .tag { color: var(--signal); }
.soft-card .soft-media { position: relative; overflow: hidden; display: flex; align-items: flex-end; justify-content: center; padding: 28px 28px 0; }
.soft-card video, .soft-card .soft-media img { border-radius: 14px 14px 0 0; width: 100%; box-shadow: 0 -20px 60px -20px rgba(77, 225, 255, .18); }
.soft-card--app .soft-media { padding: 28px 0 0; gap: 18px; }

/* ---------- 手机 / 屏幕样机 ---------- */
.phone {
  position: relative; width: 252px; aspect-ratio: 9 / 19.5; border-radius: 40px; padding: 9px;
  background: linear-gradient(145deg, #2a3240, #0b0f16 40%, #1c232f); box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .7), inset 0 0 0 1px rgba(255, 255, 255, .08);
  flex: none;
}
.phone > * { width: 100%; height: 100%; border-radius: 32px; overflow: hidden; object-fit: cover; object-position: top; }
.phone::before { content: ""; position: absolute; top: 18px; left: 50%; width: 70px; height: 20px; margin-left: -35px; border-radius: 12px; background: #000; z-index: 2; }
.phone--sm { width: 210px; }
.phone--tilt-l { transform: translateY(48px) rotate(-4deg); }
.phone--tilt-r { transform: translateY(48px) rotate(4deg); }

.screen {
  position: relative; border-radius: 18px; padding: 10px; background: linear-gradient(180deg, #1a212c, #0c1118);
  box-shadow: 0 60px 140px -40px rgba(0, 0, 0, .8), 0 0 0 1px rgba(255, 255, 255, .06), 0 0 120px -30px rgba(77, 225, 255, .25);
}
.screen video, .screen img { width: 100%; border-radius: 10px; aspect-ratio: 16 / 10; object-fit: cover; background: #070b11; }

/* ---------- 系统链路 ---------- */
.flow { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.flow-node { position: relative; padding: 0 28px 0 0; }
.flow-node .dot {
  width: 64px; height: 64px; border-radius: 18px; display: grid; place-items: center; margin-bottom: 28px;
  background: var(--surface); border: 1px solid var(--line-2); color: var(--signal); position: relative; z-index: 2;
}
.flow-node .dot svg { width: 28px; height: 28px; }
.flow-node h3 { margin: 0; font-size: 22px; font-weight: 600; }
.flow-node .sub { margin: 4px 0 14px; font-size: 15px; letter-spacing: .1em; color: var(--text-3); text-transform: uppercase; }
.flow-node p { margin: 0; color: var(--text-2); font-size: 16px; }
.flow-node ul { margin: 18px 0 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.flow-node li { font-size: 16px; color: var(--text-2); padding-left: 16px; position: relative; }
.flow-node li::before { content: ""; position: absolute; left: 0; top: .72em; width: 6px; height: 1px; background: var(--signal); }
.flow-line { position: absolute; left: 32px; right: 32px; top: 32px; height: 1px; background: var(--line-2); overflow: hidden; }
.flow-line::after {
  content: ""; position: absolute; inset: 0 auto 0 -30%; width: 30%;
  background: linear-gradient(90deg, transparent, var(--signal), transparent); animation: flow 3.6s linear infinite;
}
@keyframes flow { to { left: 100%; } }

/* ---------- 能力列表 ---------- */
.caps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 40px; margin-top: clamp(56px, 6vw, 88px); }
.cap h3 { margin: 0 0 10px; font-size: 20px; font-weight: 600; }
.cap p { margin: 0; color: var(--text-2); font-size: 15.5px; line-height: 1.7; }
.cap .k { display: block; margin-bottom: 18px; font-size: 15px; letter-spacing: .14em; color: var(--signal); }

.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(40px, 6vw, 96px); align-items: center; }
.split--rev { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); }
.feature-list { margin: 36px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.feature-list li { display: grid; grid-template-columns: 9em 1fr; gap: 20px; align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--line); }
html.lang-en .feature-list li { grid-template-columns: 11.5em 1fr; }
.feature-list b { font-weight: 600; }
.feature-list span { color: var(--text-2); font-size: 16px; }
.phones { display: flex; justify-content: center; align-items: flex-start; gap: 22px; }

/* ---------- 场景 ---------- */
.scenes { border-top: 1px solid var(--line); }
.scene-row {
  display: grid; grid-template-columns: 80px minmax(0, 1.1fr) minmax(0, 1.4fr) auto; gap: 32px; align-items: center;
  padding: 34px 0; border-bottom: 1px solid var(--line); transition: background .3s;
}
.scene-row .i { font-size: 16px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.scene-row h3 { margin: 0; font-size: clamp(24px, 2.4vw, 36px); font-weight: 600; letter-spacing: -.015em; transition: transform .4s var(--ease); }
.scene-row p { margin: 0; color: var(--text-2); font-size: 16px; }
.scene-row .kit { display: flex; gap: 8px; flex-wrap: wrap; justify-content: flex-end; }
.scene-row .kit span { height: 30px; padding: 0 12px; display: inline-flex; align-items: center; border-radius: 999px; border: 1px solid var(--line-2); font-size: 15px; color: var(--text-2); white-space: nowrap; }
.scene-row:hover h3 { transform: translateX(8px); }

/* ---------- 影片 ---------- */
.film { position: relative; display: block; border-radius: 28px; overflow: hidden; aspect-ratio: 16 / 7; background: #000; isolation: isolate; }
.film video, .film img { width: 100%; height: 100%; object-fit: cover; opacity: .9; transition: transform 1.6s var(--ease), opacity .6s; }
.film:hover video { transform: scale(1.03); opacity: 1; }
.film::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0, 0, 0, .7), transparent 55%); z-index: 1; }
.film-copy { position: absolute; left: clamp(24px, 4vw, 56px); bottom: clamp(24px, 4vw, 56px); right: 24px; z-index: 2; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.film-copy h3 { margin: 10px 0 0; font-size: clamp(26px, 3vw, 44px); font-weight: 600; letter-spacing: -.02em; line-height: 1.15; }
.play {
  flex: none; width: 76px; height: 76px; border-radius: 50%; display: grid; place-items: center;
  background: rgba(255, 255, 255, .14); backdrop-filter: blur(12px); border: 1px solid rgba(255, 255, 255, .3);
  transition: transform .4s var(--ease), background .3s;
}
.play svg { width: 22px; height: 22px; margin-left: 3px; }
.film:hover .play { transform: scale(1.08); background: rgba(255, 255, 255, .24); }
.film-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 16px; margin-top: 16px; }
.film-list a { position: relative; border-radius: 16px; overflow: hidden; aspect-ratio: 16 / 10; background: #000; }
.film-list img { width: 100%; height: 100%; object-fit: cover; opacity: .82; transition: opacity .3s, transform 1s var(--ease); }
.film-list a:hover img { opacity: 1; transform: scale(1.04); }
.film-list span { position: absolute; left: 16px; bottom: 14px; right: 16px; z-index: 2; font-size: 16px; font-weight: 500; }
.film-list a::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(0, 0, 0, .75), transparent 60%); }
.film-list small { display: block; font-size: 14px; color: var(--text-2); font-weight: 400; margin-top: 2px; }

.lightbox { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 24px; background: rgba(0, 0, 0, .9); opacity: 0; visibility: hidden; transition: opacity .3s, visibility .3s; }
.lightbox.open { opacity: 1; visibility: visible; }
.lightbox video { width: min(1280px, 100%); max-height: 86vh; border-radius: 14px; background: #000; }
.lightbox button { position: absolute; top: 20px; right: 20px; width: 48px; height: 48px; border-radius: 50%; border: 1px solid rgba(255, 255, 255, .3); font-size: 22px; }

/* ---------- 底部 CTA / 页脚 ---------- */
.cta { position: relative; overflow: hidden; isolation: isolate; padding: clamp(120px, 16vw, 220px) 0; text-align: center; }
.cta canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: -2; }
.cta::after { content: ""; position: absolute; inset: 0; z-index: -1; background: radial-gradient(60% 70% at 50% 50%, rgba(5, 8, 13, .55), rgba(5, 8, 13, .92) 75%), linear-gradient(0deg, var(--bg), transparent 30%, transparent 70%, var(--bg)); }
.cta .h1 { max-width: 14em; margin: 0 auto; }
.cta .lead { margin: 24px auto 0; }
.cta .hero-actions { justify-content: center; }

.site-footer { border-top: 1px solid var(--line); padding: 72px 0 40px; background: var(--bg); font-size: 16px; }
.footer-top { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr) 1.3fr; gap: 40px; }
.footer-top h4 { margin: 0 0 18px; font-size: 15px; font-weight: 500; letter-spacing: .14em; color: var(--text-3); text-transform: uppercase; }
.footer-top a { display: block; padding: 5px 0; color: var(--text-2); transition: color .2s; }
.footer-top .brand { display: flex; padding: 0; color: var(--text); }
.footer-top a:hover { color: var(--text); }
.footer-brand p { color: var(--text-2); margin: 18px 0 0; max-width: 22em; }
.footer-contact .big { font-size: 26px; font-weight: 500; color: var(--text); letter-spacing: -.01em; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 64px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--text-3); font-size: 15px; flex-wrap: wrap; }
.footer-bottom nav { display: flex; gap: 20px; }

/* ---------- 入场动效 ---------- */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
[data-reveal].in { opacity: 1; transform: none; }
[data-reveal][data-d="1"] { transition-delay: .08s; }
[data-reveal][data-d="2"] { transition-delay: .16s; }
[data-reveal][data-d="3"] { transition-delay: .24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; transition: none; }
  .flow-line::after { animation: none; }
  .manifesto .w { color: var(--text); }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
  .nav, .header-actions .tel { display: none; }
  .menu-btn { display: block; }
  .header-inner { justify-content: space-between; }
  .caps { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(2, 1fr); row-gap: 56px; }
  .flow-line { display: none; }
  .footer-top { grid-template-columns: 1fr 1fr 1fr; }
  .footer-brand, .footer-contact { grid-column: span 3; }
  .scene-row { grid-template-columns: 56px minmax(0, 1fr) minmax(0, 1.2fr); }
  .scene-row .kit { grid-column: 2 / -1; justify-content: flex-start; }
}
@media (max-width: 900px) {
  .stage-grid, .soft-grid, .split, .split--rev { grid-template-columns: 1fr; }
  .stage { min-height: 560px; }
  .sec-head { grid-template-columns: 1fr; }
  .film { aspect-ratio: 16 / 10; }
  .film-list { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  body { font-size: 16px; }
  .header-actions .btn { display: none; }
  .hero::after { background: linear-gradient(0deg, var(--bg) 8%, rgba(5, 8, 13, .55) 55%, rgba(5, 8, 13, .3) 100%); }
  .hero-inner { padding-top: 120px; }
  .hero-actions .btn { flex: 1 1 100%; }
  .hero-foot { grid-template-columns: 1fr 1fr; }
  .hero-foot div { padding-bottom: 18px; }
  .stage-copy, .stage-specs { padding-left: 24px; padding-right: 24px; }
  .stage-copy { padding-top: 28px; }
  .stage-badge { top: 28px; right: 24px; }
  .stage-specs b { font-size: 21px; }
  .stage-specs { padding-bottom: 28px; gap: 12px; }
  .stage { min-height: 0; }
  .stage-media img { max-width: 92%; }
  .caps { grid-template-columns: 1fr; gap: 32px; }
  .flow { grid-template-columns: 1fr; }
  .feature-list li, html.lang-en .feature-list li { grid-template-columns: 1fr; gap: 4px; }
  .phones { gap: 12px; }
  .phone { width: 46%; }
  .phone--tilt-l, .phone--tilt-r { transform: none; }
  .phones .phone:nth-child(3) { display: none; }
  .scene-row { grid-template-columns: 1fr; gap: 10px; padding: 26px 0; }
  .scene-row .kit { grid-column: auto; }
  .film-copy { flex-direction: column; align-items: flex-start; }
  .play { width: 60px; height: 60px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-brand, .footer-contact { grid-column: span 2; }
}

/* ---------- 子页面（产品 / 方案 / 案例 / 资讯 / 关于 / 联系 / 下载） ---------- */
.page-hero { position: relative; min-height: min(78vh, 760px); display: flex; align-items: flex-end; padding: 160px 0 clamp(56px, 7vw, 96px); overflow: hidden; isolation: isolate; }
.page-hero > img, .page-hero > video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; }
.page-hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(0deg, var(--bg) 0%, rgba(5, 8, 13, .55) 45%, rgba(5, 8, 13, .2) 100%), linear-gradient(90deg, rgba(5, 8, 13, .7), transparent 60%); }
.page-hero .lead { margin-top: 24px; }
.page-hero .eyebrow { margin-bottom: 24px; }
.page-hero--short { min-height: 0; padding-top: 180px; }
.page-hero--short::after { display: none; }
.crumbs { display: flex; gap: 10px; font-size: 16px; color: var(--text-3); margin-bottom: 28px; }
.crumbs a:hover { color: var(--text); }

.tabs-row { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 48px; }
.tabs-row a { height: 42px; padding: 0 18px; border-radius: 21px; border: 1px solid var(--line-2); display: inline-flex; align-items: center; font-size: 16px; color: var(--text-2); }
.tabs-row a:hover, .tabs-row a[aria-current] { color: var(--text); border-color: var(--text); }

.card-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.card-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.card-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.img-card { display: flex; flex-direction: column; border-radius: var(--radius); overflow: hidden; background: var(--surface); border: 1px solid var(--line); transition: transform .4s var(--ease), border-color .3s; }
.img-card:hover { transform: translateY(-4px); border-color: var(--line-2); }
.img-card .ph { aspect-ratio: 16 / 10; overflow: hidden; background: #0a1019; position: relative; }
.img-card .ph img { width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease); }
.img-card:hover .ph img { transform: scale(1.04); }
.img-card .ph--studio { background: #0c141f; }
.img-card .ph--studio img { object-fit: cover; }
.img-card .ph .badge { position: absolute; left: 14px; top: 14px; font-size: 14px; padding: 4px 10px; border-radius: 12px; background: rgba(5, 8, 13, .7); color: var(--text-2); backdrop-filter: blur(6px); }
.img-card .bd { padding: 24px 24px 26px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.img-card .bd .k { font-size: 15px; letter-spacing: .12em; color: var(--text-3); text-transform: uppercase; }
.img-card .bd h3 { margin: 0; font-size: 22px; font-weight: 600; letter-spacing: -.01em; }
.img-card .bd p { margin: 0; color: var(--text-2); font-size: 16px; }
.img-card .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }
.img-card .chips span { font-size: 15px; padding: 3px 10px; border-radius: 12px; border: 1px solid var(--line-2); color: var(--text-2); }
.img-card .more { margin-top: auto; padding-top: 10px; font-size: 16px; color: var(--signal); }

.spec { width: 100%; border-collapse: collapse; font-size: 16px; }
.spec th, .spec td { text-align: left; padding: 16px 0; border-bottom: 1px solid var(--line); vertical-align: baseline; }
.spec th { width: 32%; color: var(--text-3); font-weight: 400; padding-right: 24px; }
.on-light .spec th, .on-light .spec td { border-color: rgba(11, 16, 24, .1); }
.on-light .spec th { color: var(--ink-3); }

.media-frame { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #0a1019; }
.media-frame img, .media-frame video { width: 100%; height: auto; }
.media-cap { margin-top: 12px; font-size: 15px; color: var(--text-3); }

.steps-h { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; counter-reset: s; border-top: 1px solid var(--line); }
.steps-h > div { padding: 28px 28px 0 0; counter-increment: s; }
.steps-h > div::before { content: "0" counter(s); display: block; font: 500 15px var(--mono); color: var(--signal); margin-bottom: 18px; }
.steps-h b { display: block; font-size: 20px; font-weight: 600; margin-bottom: 10px; }
.steps-h span { color: var(--text-2); font-size: 16px; }

.prose { max-width: 760px; font-size: 18px; line-height: 1.9; color: var(--text-2); }
.prose h2 { color: var(--text); font-size: 28px; font-weight: 600; margin: 56px 0 18px; letter-spacing: -.01em; line-height: 1.3; }
.prose p { margin: 0 0 20px; }
.prose ul { margin: 0 0 20px; padding-left: 1.2em; }
.prose figure { margin: 36px 0; }
.prose figcaption { font-size: 15px; color: var(--text-3); margin-top: 10px; }
.prose img { border-radius: 14px; }
.prose b { color: var(--text); font-weight: 600; }

.form { display: grid; gap: 18px; }
.form .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form label { display: grid; gap: 8px; font-size: 16px; color: var(--text-2); }
.form input, .form select, .form textarea { height: 52px; padding: 0 16px; border-radius: 12px; border: 1px solid var(--line-2); background: var(--surface); color: var(--text); font: inherit; font-size: 16px; }
.form textarea { height: 140px; padding: 14px 16px; resize: vertical; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--signal); }
.chk { display: flex; flex-wrap: wrap; gap: 10px; }
.chk label { display: inline-flex; flex-direction: row; align-items: center; gap: 8px; height: 42px; padding: 0 16px; border-radius: 21px; border: 1px solid var(--line-2); cursor: pointer; color: var(--text); }
.chk input { width: 16px; height: 16px; accent-color: var(--signal); }
.note-ph { font-size: 15px; color: var(--gold); }

.dl-list { display: grid; border-top: 1px solid var(--line); }
.dl-list a { display: grid; grid-template-columns: 56px 1fr auto auto; gap: 20px; align-items: center; padding: 22px 0; border-bottom: 1px solid var(--line); }
.dl-list a:hover b { color: var(--signal); }
.dl-list .ico { width: 56px; height: 56px; border-radius: 12px; background: var(--surface-2); display: grid; place-items: center; font: 500 14px var(--mono); color: var(--signal); }
.dl-list b { display: block; font-weight: 600; font-size: 17px; transition: color .2s; }
.dl-list small { color: var(--text-3); font-size: 16px; }
.dl-list .sz { font: 400 15px var(--mono); color: var(--text-3); }

@media (max-width: 1080px) { .card-grid, .card-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); } .steps-h { grid-template-columns: 1fr 1fr; row-gap: 32px; } }
@media (max-width: 680px) {
  .card-grid, .card-grid--2, .card-grid--4 { grid-template-columns: 1fr; }
  .steps-h { grid-template-columns: 1fr; }
  .form .row2 { grid-template-columns: 1fr; }
  .dl-list a { grid-template-columns: 44px 1fr; } .dl-list .ico { width: 44px; height: 44px; } .dl-list .sz, .dl-list .go { display: none; }
  .page-hero { min-height: 64vh; padding-top: 120px; }
}
/* 设备详情首屏：透明底产品图在右侧，只保留底部渐隐，保证设备本体足够亮 */
.page-hero--device::after { background: linear-gradient(0deg, var(--bg) 0%, transparent 30%); }
@media (max-width: 860px) { .page-hero--device > img { opacity: .35; } }
@media (min-width: 861px) {
  .page-hero--device .display { max-width: 7.2em; font-size: clamp(40px, 5.2vw, 76px) !important; }
  .page-hero--device .lead { max-width: 23em; }
}

/* ---------- 语言切换 ---------- */
.lang-switch { display: inline-flex; border: 1px solid var(--line-2); border-radius: 999px; padding: 3px; gap: 2px; }
.lang-switch button { height: 30px; min-width: 38px; padding: 0 10px; border-radius: 999px; font-size: 15px; color: var(--text-2); }
.lang-switch button[aria-pressed="true"] { background: var(--text); color: var(--ink); font-weight: 600; }
.mobile-nav .lang-switch { align-self: flex-start; margin: 8px 0; }
.lightbox.portrait video { width: auto; height: min(88vh, 900px); max-width: 92vw; aspect-ratio: 9 / 16; }
html.lang-en .display, html.lang-en .h1, html.lang-en .h2 { letter-spacing: -.035em; }

/* ---------- RID-L1 肩灯专题（参考产品海报：深蓝夜景、粗体标题、标准条、图标格、参数面板） ---------- */
.l1p { position: relative; overflow: hidden; isolation: isolate; padding: clamp(96px, 11vw, 160px) 0 clamp(72px, 9vw, 120px);
  background: radial-gradient(70% 50% at 50% 30%, #0f2a5c 0%, #071633 45%, #040a18 100%); }
.l1p-sky { position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(30% 22% at 30% 38%, rgba(40, 90, 255, .35), transparent 70%), radial-gradient(28% 20% at 70% 36%, rgba(255, 40, 70, .28), transparent 70%),
    radial-gradient(1px 1px at 20% 30%, rgba(160, 200, 255, .5), transparent), radial-gradient(1px 1px at 80% 20%, rgba(160, 200, 255, .4), transparent); }
.l1p-head { text-align: center; }
.l1p-title { margin: 0; font-weight: 700; letter-spacing: -.02em; line-height: 1.08; font-size: clamp(38px, 6vw, 88px);
  background: linear-gradient(180deg, #fff 30%, #c8d6ee); -webkit-background-clip: text; background-clip: text; color: transparent; text-shadow: none; }
.l1p-tag { margin: 18px 0 0; font-size: clamp(19px, 2.2vw, 32px); font-weight: 500; letter-spacing: .06em; color: #e6eefc; }
html.lang-en .l1p-tag { letter-spacing: 0; }
.l1p-std { display: inline-flex; align-items: stretch; margin-top: 30px; border: 1px solid rgba(120, 160, 230, .35); border-radius: 12px; background: rgba(8, 22, 52, .7); overflow: hidden; text-align: left; max-width: 100%; }
.l1p-std .badge { display: flex; align-items: center; gap: 8px; padding: 12px 18px; background: rgba(30, 70, 160, .35); border-right: 1px solid rgba(120, 160, 230, .35); font-weight: 700; font-size: 17px; white-space: nowrap; }
.l1p-std .list { display: block; padding: 12px 18px; font-size: 16px; color: #c9d6ee; line-height: 1.6; }
.l1p-std .list b { color: #fff; font-weight: 600; }
.l1p-std .list i { display: inline-block; width: 1px; height: 14px; background: rgba(160, 190, 240, .45); margin: 0 12px; vertical-align: -2px; }
.l1p-std .list > span { color: #9fb3d6; }
.ico { width: 30px; height: 30px; flex: none; }
.ico.sm { width: 20px; height: 20px; color: #6fb6ff; }

.l1p-stage { position: relative; height: clamp(420px, 52vw, 680px); margin-top: 24px; }
.l1p-rings { position: absolute; left: 50%; top: 52%; width: min(1100px, 120%); aspect-ratio: 2.2; transform: translate(-50%, -50%); border-radius: 50%; pointer-events: none;
  background: repeating-radial-gradient(ellipse at center, rgba(90, 150, 255, .0) 0 26px, rgba(90, 150, 255, .22) 27px 28px, rgba(90, 150, 255, 0) 29px 54px);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%); mask-image: radial-gradient(ellipse at center, #000 30%, transparent 70%); animation: l1pulse 6s linear infinite; }
@keyframes l1pulse { from { transform: translate(-50%, -50%) scale(.92); } to { transform: translate(-50%, -50%) scale(1.08); } }
@media (prefers-reduced-motion: reduce) { .l1p-rings { animation: none; } }
.l1p-device { position: absolute; left: 50%; top: 46%; width: min(760px, 70%); transform: translate(-50%, -50%) rotate(-6deg); filter: drop-shadow(0 40px 60px rgba(0, 0, 0, .7)) drop-shadow(-40px 0 80px rgba(40, 90, 255, .35)) drop-shadow(40px 0 80px rgba(255, 40, 70, .3)); }
.l1p-phone { position: absolute; left: 0; bottom: 0; margin: 0; width: clamp(150px, 17vw, 230px); aspect-ratio: 9 / 16; border-radius: 26px; padding: 7px; background: linear-gradient(145deg, #2a3240, #0b0f16 40%, #1c232f); box-shadow: 0 30px 80px -20px rgba(0, 0, 0, .8), inset 0 0 0 1px rgba(255, 255, 255, .1); }
.l1p-phone video { width: 100%; height: 100%; object-fit: cover; border-radius: 20px; }
.l1p-call { position: absolute; right: 0; top: 8%; padding: 16px 20px; border-radius: 12px; background: rgba(6, 16, 38, .78); border: 1px solid rgba(120, 160, 230, .3); font-size: 18px; line-height: 1.5; backdrop-filter: blur(6px); }
.l1p-call b { display: block; font-size: 20px; }
.l1p-call span { color: #d6e2f6; }

.l1p-feats { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 12px; margin-top: 20px; }
.pf { padding: 24px 20px; border-radius: 12px; background: linear-gradient(180deg, rgba(14, 34, 72, .9), rgba(8, 20, 44, .9)); border: 1px solid rgba(120, 160, 230, .22); text-align: left; }
.pf .ico { margin: 0 0 14px; color: #dfe9ff; width: 34px; height: 34px; }
.pf b { display: block; font-size: 19px; font-weight: 700; line-height: 1.35; }
.pf span { display: block; margin-top: 10px; color: #c9d6ee; font-size: 16px; line-height: 1.65; }

.l1p-spec { display: grid; grid-template-columns: 300px 1fr; gap: 28px; align-items: center; margin-top: 16px; padding: 28px 32px; border-radius: 14px; background: rgba(8, 22, 52, .78); border: 1px solid rgba(120, 160, 230, .22); }
.l1p-spec-head h3 { margin: 0 0 12px; font-size: clamp(28px, 2.6vw, 38px); font-weight: 700; }
.l1p-spec-head img { width: 100%; filter: drop-shadow(0 20px 30px rgba(0, 0, 0, .6)); }
.l1p-spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px 32px; }
/* 图标 | 名称（固定列宽）| 数值：名称与数值各自左对齐，数值折行时仍在本列内，图标与首行顶对齐 */
.l1p-spec-grid div { display: grid; grid-template-columns: 30px 5.2em 1fr; column-gap: 14px; align-items: start; }
html.lang-en .l1p-spec-grid div { grid-template-columns: 30px 7.4em 1fr; }
.l1p-spec-grid .ico { color: #dfe9ff; width: 26px; height: 26px; margin-top: 1px; }
.l1p-spec-grid b { font-size: 19px; font-weight: 700; line-height: 1.5; }
.l1p-spec-grid span { font-size: 18px; line-height: 1.55; color: #d6e2f6; }

.l1p-uses { display: grid; grid-template-columns: 1fr 1.6fr; gap: 28px; align-items: center; margin-top: 16px; padding: 26px 32px; border-radius: 14px; background: rgba(8, 22, 52, .78); border: 1px solid rgba(120, 160, 230, .22); }
.l1p-uses h3 { margin: 0; font-size: clamp(26px, 2.4vw, 36px); font-weight: 700; }
.l1p-uses p { margin: 10px 0 0; color: #c9d6ee; font-size: 16px; }
.l1p-uses-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; text-align: center; }
.l1p-uses-grid .ico { width: 42px; height: 42px; margin: 0 auto 10px; color: #fff; }
.l1p-uses-grid span { font-size: 17px; color: #e6eefc; }
.l1p .stage-note { margin-top: 24px; color: #a9bad6; }

@media (max-width: 1180px) { .l1p-feats { grid-template-columns: repeat(3, 1fr); } .l1p-spec { grid-template-columns: 1fr; } .l1p-spec-head { display: flex; align-items: center; justify-content: space-between; gap: 20px; } .l1p-spec-head h3 { margin: 0; } .l1p-spec-head img { width: 180px; } .l1p-uses { grid-template-columns: 1fr; } }
@media (max-width: 760px) {
  .l1p-feats { grid-template-columns: 1fr 1fr; } .l1p-spec-grid { grid-template-columns: 1fr; } .l1p-uses-grid { grid-template-columns: repeat(3, 1fr); row-gap: 20px; }
  .l1p-stage { height: 520px; } .l1p-device { top: 30%; width: 92%; } .l1p-call { display: none; } .l1p-phone { left: 50%; transform: translateX(-50%); width: 170px; }
  .l1p-std { flex-direction: column; } .l1p-std .badge { border-right: 0; border-bottom: 1px solid rgba(120, 160, 230, .35); }
  .l1p-spec-grid div, html.lang-en .l1p-spec-grid div { grid-template-columns: 30px 1fr; row-gap: 2px; } .l1p-spec-grid div span { grid-column: 2; }
}
@media (max-width: 420px) { .l1p-feats { grid-template-columns: 1fr; } }
html.lang-en .l1p-title { font-size: clamp(32px, 4.6vw, 66px); }
html.lang-en .l1p-tag { font-size: clamp(17px, 1.7vw, 24px); }
html.lang-en .pf span { font-size: 15px; }

/* 段落断行：避免末行只剩一两个字（孤字），标题均衡分行 */
p, li, dd, td, .pf span, .cap p, .img-card p, .feature-list span, .stage-copy p { text-wrap: pretty; }
h1, h2, h3, .display, .h1, .h2 { text-wrap: balance; }
.l1p-spec-head h3 { white-space: nowrap; }
@media (max-width: 760px) {
  .l1p-spec-head img { width: 130px; }
  .l1p-uses-grid { grid-template-columns: repeat(2, 1fr); }
  .l1p-uses-grid span { word-break: keep-all; }
}
.stage-specs b { white-space: nowrap; }
@media (max-width: 640px) {
  .stage-specs { padding: 0 24px 28px; gap: 12px; }
  .stage-specs b { font-size: 20px; }
  .stage-specs span { font-size: 14px; }
}