/* ========================================================================== 
   一秒传媒官网视觉系统
   说明：无第三方 CSS；颜色、间距和动画时长均通过变量集中管理。
   ========================================================================== */

:root {
  color-scheme: dark;
  --ink: #f5f4ef;
  --ink-dark: #111317;
  --muted: #a7aaad;
  --muted-dark: #646970;
  --black: #090b0e;
  --black-soft: #111419;
  --panel: #15191e;
  --panel-light: #f1f0ea;
  --line: rgba(255, 255, 255, 0.16);
  --line-dark: rgba(15, 18, 22, 0.16);
  --amber: #f2b84b;
  --red: #e94c3d;
  --cyan: #58b8c7;
  --green: #4ba67a;
  --shell: 1240px;
  --header-height: 82px;
  --radius: 6px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.45, 0, 0.2, 1);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.26);
}

/* 基础重置与可访问性。 */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--black); }
body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--black);
  font-family: Inter, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body.menu-open, body.modal-open { overflow: hidden; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button { color: inherit; }
a { color: inherit; text-decoration: none; }
img, video, canvas, svg { display: block; max-width: 100%; }
button { cursor: pointer; }
[hidden] { display: none !important; }
::selection { color: var(--black); background: var(--amber); }
:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }

.page-shell { width: min(calc(100% - 64px), var(--shell)); margin-inline: auto; }
.section { position: relative; padding: 132px 0; }
.icon { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.svg-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--black);
  background: var(--amber);
  border-radius: 3px;
  transform: translateY(-150%);
  transition: transform 0.25s;
}
.skip-link:focus { transform: none; }

/* 页面顶部进度条使用 transform，避免触发布局计算。 */
.scroll-progress { position: fixed; z-index: 260; top: 0; left: 0; width: 100%; height: 2px; pointer-events: none; }
.scroll-progress span { width: 100%; height: 100%; display: block; background: linear-gradient(90deg, var(--amber), var(--red), var(--cyan)); transform: scaleX(0); transform-origin: left; will-change: transform; }

/* 极淡胶片颗粒用 CSS 图案模拟，不加载纹理图片。 */
.global-grain {
  position: fixed;
  z-index: 240;
  inset: 0;
  pointer-events: none;
  opacity: 0.065;
  background-image:
    repeating-radial-gradient(circle at 22% 31%, transparent 0 1px, rgba(255,255,255,.28) 1px 2px, transparent 2px 4px),
    repeating-radial-gradient(circle at 71% 62%, transparent 0 2px, rgba(0,0,0,.5) 2px 3px, transparent 3px 5px);
  background-size: 7px 7px, 9px 9px;
  mix-blend-mode: soft-light;
}

/* ========================================================================== 
   导航与品牌标识
   ========================================================================== */
.site-header {
  position: fixed;
  z-index: 250;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  padding: 0 32px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.4s, border-color 0.4s, height 0.4s;
}
.site-header.is-scrolled {
  height: 68px;
  background: rgba(9, 11, 14, 0.86);
  border-color: var(--line);
  backdrop-filter: blur(15px);
}
.brand { min-width: 0; display: inline-flex; align-items: center; gap: 12px; justify-self: start; }
.brand-mark {
  position: relative;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.46);
  border-radius: 50%;
  overflow: hidden;
}
.brand-mark i { position: absolute; top: -5px; left: 18px; width: 1px; height: 52px; background: var(--amber); transform: rotate(24deg); }
.brand-mark b { position: relative; font-size: 11px; letter-spacing: 0; }
.brand-copy { display: grid; line-height: 1.05; }
.brand-copy strong { font-size: 15px; letter-spacing: 0; }
.brand-copy small { margin-top: 6px; color: var(--muted); font-size: 8px; letter-spacing: 0; }

.desktop-nav { display: flex; align-items: center; gap: 34px; }
.desktop-nav a { position: relative; color: rgba(255,255,255,.76); font-size: 12px; }
.desktop-nav a::after { content: ""; position: absolute; right: 0; bottom: -9px; left: 0; height: 1px; background: var(--amber); transform: scaleX(0); transition: transform .35s var(--ease); }
.desktop-nav a:hover, .desktop-nav a.active { color: #fff; }
.desktop-nav a:hover::after, .desktop-nav a.active::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 18px; justify-self: end; }
.header-contact { display: inline-flex; align-items: center; gap: 9px; font-size: 12px; }
.header-contact .icon { width: 16px; height: 16px; transition: transform .3s var(--ease); }
.header-contact:hover .icon { transform: translateX(5px); }
.menu-toggle { width: 42px; height: 42px; padding: 0; display: none; place-items: center; color: #fff; background: transparent; border: 1px solid var(--line); border-radius: 50%; }
.menu-toggle .icon { width: 18px; height: 18px; }
.menu-toggle .close-icon { display: none; }
.menu-toggle[aria-expanded="true"] .menu-icon { display: none; }
.menu-toggle[aria-expanded="true"] .close-icon { display: block; }

.mobile-menu {
  position: fixed;
  z-index: 230;
  inset: 0;
  padding: 120px 32px 34px;
  display: flex;
  flex-direction: column;
  color: var(--ink);
  background: var(--black-soft);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-18px);
  transition: opacity .35s, transform .55s var(--ease), visibility .35s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; pointer-events: auto; transform: none; }
.mobile-menu > p { margin: 0 0 40px; color: var(--muted); font-size: 10px; }
.mobile-menu nav { display: grid; }
.mobile-menu nav a { min-height: 66px; display: flex; align-items: center; gap: 18px; border-bottom: 1px solid var(--line); font-size: 25px; }
.mobile-menu nav span { color: var(--amber); font-size: 9px; }
.mobile-menu footer { margin-top: auto; display: flex; justify-content: space-between; gap: 16px; color: var(--muted); font-size: 11px; }
.mobile-menu footer button { padding: 0; display: inline-flex; align-items: center; gap: 8px; color: inherit; background: none; border: 0; }
.mobile-menu footer .icon { width: 14px; height: 14px; }

/* ========================================================================== 
   首屏视频与标题
   ========================================================================== */
.hero { position: relative; min-height: 92svh; display: flex; align-items: stretch; overflow: hidden; isolation: isolate; background: #12161b; }
.hero-video, .hero-video-fallback, .hero-shade, .particle-canvas { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-video { z-index: -5; object-fit: cover; filter: saturate(.72) contrast(1.08) brightness(.68); transform: scale(1.03); will-change: transform; }
.hero-video-fallback {
  z-index: -6;
  background:
    linear-gradient(115deg, rgba(9,11,14,.15), rgba(9,11,14,.75)),
    url("https://images.unsplash.com/photo-1485846234645-a62644f84728?auto=format&fit=crop&w=1800&q=76") center / cover no-repeat;
}
.hero-shade {
  z-index: -3;
  background:
    linear-gradient(180deg, rgba(4,5,7,.45) 0%, transparent 28%, rgba(4,5,7,.08) 52%, rgba(4,5,7,.86) 100%),
    linear-gradient(90deg, rgba(4,5,7,.56) 0%, transparent 55%, rgba(4,5,7,.22) 100%);
}
.particle-canvas { z-index: -1; pointer-events: none; opacity: .65; }
.hero-rails { position: absolute; z-index: 0; inset: 0; display: grid; grid-template-columns: repeat(4, 1fr); pointer-events: none; }
.hero-rails i { border-left: 1px solid rgba(255,255,255,.08); }
.hero-rails i:last-child { border-right: 1px solid rgba(255,255,255,.08); }

.hero-content { position: relative; z-index: 2; min-height: 92svh; padding-top: calc(var(--header-height) + 54px); padding-bottom: 66px; display: flex; flex-direction: column; }
.hero-kicker { display: flex; justify-content: space-between; gap: 20px; color: rgba(255,255,255,.72); font-size: 9px; }
.hero-title-wrap { margin-top: auto; }
.hero-eyebrow { margin: 0 0 20px; color: var(--amber); font-size: 11px; }
.hero h1 { margin: 0; font-size: 104px; font-weight: 650; line-height: .92; letter-spacing: 0; }
.title-line { display: block; overflow: hidden; }
.title-line b { display: block; transform: translateY(110%); animation: hero-title-in 1s .22s var(--ease) forwards; }
.title-line:nth-child(2) b { animation-delay: .38s; }
.title-offset { padding-left: 15%; }
.hero-lower { margin-top: 36px; display: flex; align-items: flex-end; justify-content: space-between; gap: 36px; }
.hero-lower > p { margin: 0; max-width: 520px; color: rgba(255,255,255,.72); font-size: 13px; }
.hero-buttons { display: flex; align-items: center; gap: 28px; }
.play-button { padding: 0; display: inline-flex; align-items: center; gap: 12px; color: #fff; background: transparent; border: 0; font-size: 10px; }
.play-button > span { width: 48px; height: 48px; display: grid; place-items: center; color: var(--black); background: var(--amber); border-radius: 50%; transition: transform .35s var(--ease), background .3s; }
.play-button .icon { width: 17px; height: 17px; fill: currentColor; stroke: none; }
.play-button:hover > span { background: #fff; transform: scale(1.08); }
.text-link { display: inline-flex; align-items: center; gap: 10px; font-size: 11px; }
.text-link .icon { width: 17px; height: 17px; transition: transform .3s var(--ease); }
.text-link:hover .icon { transform: translateX(5px); }

.hero-side-note { position: absolute; z-index: 2; top: 50%; right: 17px; color: rgba(255,255,255,.48); font-size: 8px; writing-mode: vertical-rl; transform: translateY(-50%); }
.sound-toggle { position: absolute; z-index: 2; bottom: 24px; left: 32px; padding: 0; display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,.62); background: none; border: 0; font-size: 8px; }
.sound-toggle .icon { width: 14px; height: 14px; }
.sound-toggle[aria-pressed="true"] { color: var(--amber); }
.reveal-from-top { opacity: 0; transform: translateY(-14px); animation: fade-down .7s .65s var(--ease) forwards; }

/* 胶片走带。 */
.film-ticker { min-height: 76px; display: flex; align-items: center; color: var(--black); background: var(--amber); overflow: hidden; }
.ticker-track { width: max-content; display: flex; align-items: center; gap: 24px; white-space: nowrap; animation: ticker 26s linear infinite; will-change: transform; }
.ticker-track span { font-size: 13px; font-weight: 700; }
.ticker-track i { width: 7px; height: 7px; display: block; background: var(--red); transform: rotate(45deg); }

/* ========================================================================== 
   通用区块标题与滚动入场
   ========================================================================== */
.section-heading { margin-bottom: 58px; display: flex; align-items: flex-end; justify-content: space-between; gap: 36px; }
.section-heading > div > span, .section-index > span, .services-intro > span, .contact-intro > span { color: var(--red); font-size: 9px; }
.section-heading h2 { margin: 10px 0 0; color: var(--ink-dark); font-size: 54px; line-height: 1; letter-spacing: 0; }
.section-heading > p { max-width: 420px; margin: 0; color: var(--muted-dark); font-size: 12px; }
.section-heading.light h2 { color: var(--ink); }
.section-heading.light > div > span { color: var(--amber); }
.section-heading.light > p { color: var(--muted); }
.light-link { color: var(--ink); }

.reveal { opacity: 0; transform: translateY(32px); transition: opacity .75s var(--ease), transform .9s var(--ease); will-change: transform, opacity; }
.reveal.is-visible { opacity: 1; transform: none; }

/* ========================================================================== 
   关于与数据
   ========================================================================== */
.about-section { color: var(--ink-dark); background: var(--panel-light); }
.about-grid { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 40px 80px; }
.section-index { grid-row: 1 / span 2; }
.section-index > p { margin: 32px 0 0; color: var(--muted-dark); font-size: 11px; }
.section-kicker { margin: 0 0 16px; color: var(--cyan); font-size: 9px; }
.about-copy h2 { margin: 0; max-width: 850px; font-size: 49px; font-weight: 600; line-height: 1.12; letter-spacing: 0; }
.about-copy .lead { max-width: 820px; margin: 34px 0 0; color: #555b61; font-size: 15px; line-height: 2; }
.about-meta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 8px; }
.about-meta span { padding: 7px 12px; color: #43484e; border: 1px solid var(--line-dark); border-radius: 999px; font-size: 9px; }
.stat-grid { grid-column: 2; margin-top: 28px; display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.stat-grid article { min-height: 174px; padding: 26px 18px; border-right: 1px solid var(--line-dark); }
.stat-grid article:first-child { padding-left: 0; }
.stat-grid article:last-child { border-right: 0; }
.stat-grid strong { display: block; color: var(--ink-dark); font-size: 49px; line-height: 1; }
.stat-grid strong::after { content: "+"; color: var(--red); font-size: 20px; vertical-align: top; }
.stat-grid span { margin-top: 30px; display: block; font-size: 11px; }
.stat-grid small { margin-top: 3px; display: block; color: var(--muted-dark); font-size: 7px; }

/* ========================================================================== 
   作品案例
   ========================================================================== */
.works-section { color: var(--ink-dark); background: #faf9f4; }
.work-toolbar { margin-bottom: 32px; display: flex; justify-content: space-between; align-items: center; gap: 22px; border-bottom: 1px solid var(--line-dark); }
.work-filters { display: flex; gap: 28px; overflow-x: auto; scrollbar-width: none; }
.work-filters::-webkit-scrollbar { display: none; }
.work-filters button { position: relative; min-height: 48px; padding: 0; flex: 0 0 auto; color: var(--muted-dark); background: none; border: 0; font-size: 10px; }
.work-filters button::after { content: ""; position: absolute; right: 0; bottom: -1px; left: 0; height: 2px; background: var(--red); transform: scaleX(0); transition: transform .3s; }
.work-filters button.active { color: var(--ink-dark); }
.work-filters button.active::after { transform: scaleX(1); }
.work-toolbar > span { flex: 0 0 auto; color: var(--muted-dark); font-size: 8px; }
.work-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 70px 24px; }
.work-card { min-width: 0; transition: opacity .4s, transform .55s var(--ease); }
.work-card.is-hidden { display: none; }
.work-card button { width: 100%; padding: 0; display: block; color: inherit; background: none; border: 0; text-align: left; }
.work-card figure { position: relative; aspect-ratio: 4 / 5; margin: 0; overflow: hidden; background: #d6d5ce; }
.work-wide figure { aspect-ratio: 16 / 9; }
.work-card img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.78) contrast(1.04); transform: scale(1.01); transition: filter .55s, transform .9s var(--ease); }
.work-card figure::after { content: ""; position: absolute; inset: 0; background: linear-gradient(120deg, transparent 35%, rgba(255,255,255,.28), transparent 65%); transform: translateX(-120%); transition: transform .8s var(--ease); }
.work-card button:hover img { filter: saturate(1) contrast(1.02); transform: scale(1.045); }
.work-card button:hover figure::after { transform: translateX(120%); }
.frame-code { position: absolute; right: 12px; bottom: 10px; padding: 4px 7px; color: #fff; background: rgba(8,10,12,.68); font-size: 7px; backdrop-filter: blur(4px); }
.media-error { background: linear-gradient(135deg, #252a31, #101318 70%); }
.media-error::before { content: "MEDIA PREVIEW"; position: absolute; top: 50%; left: 50%; color: rgba(255,255,255,.5); font-size: 9px; transform: translate(-50%, -50%); }
.work-info { padding-top: 18px; display: grid; grid-template-columns: 1fr auto; gap: 4px 20px; }
.work-info > span { grid-column: 1 / -1; color: var(--red); font-size: 8px; }
.work-info h3 { margin: 7px 0 0; font-size: 29px; line-height: 1.1; }
.work-info p { margin: 13px 0 0; color: var(--muted-dark); font-size: 9px; }

/* ========================================================================== 
   服务能力与胶片盘动效
   ========================================================================== */
.services-section { background: var(--black-soft); }
.services-grid { display: grid; grid-template-columns: 390px minmax(0, 1fr); gap: 90px; align-items: start; }
.services-intro { position: sticky; top: 104px; }
.services-intro > span { color: var(--amber); }
.services-intro h2 { margin: 18px 0 24px; font-size: 49px; line-height: 1.08; letter-spacing: 0; }
.services-intro > p { max-width: 350px; margin: 0; color: var(--muted); font-size: 12px; }
.reel-visual { position: relative; width: 230px; height: 230px; margin-top: 60px; display: grid; place-items: center; }
.reel-ring { position: absolute; inset: 0; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; animation: reel-spin 18s linear infinite; }
.reel-ring::before { content: ""; position: absolute; inset: 23px; border: 1px dashed rgba(242,184,75,.38); border-radius: 50%; }
.reel-ring i { position: absolute; top: 50%; left: 50%; width: 35px; height: 35px; margin: -17px; background: #252a31; border: 1px solid rgba(255,255,255,.17); border-radius: 50%; transform-origin: 17px 17px; }
.reel-ring i:nth-child(1) { transform: translateY(-69px); }
.reel-ring i:nth-child(2) { transform: rotate(60deg) translateY(-69px) rotate(-60deg); }
.reel-ring i:nth-child(3) { transform: rotate(120deg) translateY(-69px) rotate(-120deg); }
.reel-ring i:nth-child(4) { transform: translateY(69px); }
.reel-ring i:nth-child(5) { transform: rotate(240deg) translateY(-69px) rotate(-240deg); }
.reel-ring i:nth-child(6) { transform: rotate(300deg) translateY(-69px) rotate(-300deg); }
.reel-center { width: 57px; height: 57px; display: grid; place-items: center; color: var(--amber); border: 1px solid var(--amber); border-radius: 50%; }
.reel-center .icon { width: 24px; height: 24px; }
.reel-visual > span { position: absolute; right: -30px; bottom: 12px; color: var(--muted); font-size: 7px; writing-mode: vertical-rl; }
.service-list { border-top: 1px solid var(--line); }
.service-item { border-bottom: 1px solid var(--line); }
.service-item > button { width: 100%; min-height: 98px; padding: 0; display: grid; grid-template-columns: 50px 1fr 24px; align-items: center; gap: 12px; color: var(--ink); background: none; border: 0; text-align: left; }
.service-item > button span { color: var(--amber); font-size: 8px; }
.service-item > button h3 { margin: 0; font-size: 24px; font-weight: 550; }
.service-item > button i { color: var(--muted); font-size: 18px; font-style: normal; text-align: right; }
.service-detail { padding: 0 24px 34px 62px; animation: detail-open .42s var(--ease); }
.service-detail p { max-width: 600px; margin: 0; color: var(--muted); font-size: 12px; }
.service-detail ul { margin: 22px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 7px; list-style: none; }
.service-detail li { padding: 5px 9px; color: var(--cyan); border: 1px solid rgba(88,184,199,.35); border-radius: 999px; font-size: 8px; }

/* ========================================================================== 
   制作流程
   ========================================================================== */
.process-section { background: #1b2027; overflow: hidden; }
.process-section::before { content: ""; position: absolute; top: -160px; right: -180px; width: 500px; height: 500px; border: 1px solid rgba(88,184,199,.16); border-radius: 50%; }
.process-track { position: relative; margin: 80px 0 0; padding: 0; display: grid; grid-template-columns: repeat(5, 1fr); list-style: none; }
.process-track::before { content: ""; position: absolute; top: 47px; right: 0; left: 0; height: 1px; background: var(--line); }
.process-track li { position: relative; min-width: 0; padding-right: 25px; }
.process-track li > span { color: var(--muted); font-size: 8px; }
.process-track li > i { position: relative; z-index: 1; width: 13px; height: 13px; margin: 26px 0 38px; display: block; background: var(--black-soft); border: 2px solid var(--amber); border-radius: 50%; box-shadow: 0 0 0 7px #1b2027; }
.process-track h3 { margin: 0; font-size: 18px; }
.process-track p { margin: 13px 0 30px; color: var(--muted); font-size: 10px; line-height: 1.9; }
.process-track small { color: var(--amber); font-size: 7px; }

/* ========================================================================== 
   团队
   ========================================================================== */
.studio-section { color: var(--ink-dark); background: var(--panel-light); }
.team-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 15px; }
.team-card { min-width: 0; }
.team-card figure { position: relative; aspect-ratio: 4 / 5; margin: 0; overflow: hidden; background: #d7d6d0; }
.team-card img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(1) contrast(1.04); transition: filter .45s, transform .7s var(--ease); }
.team-card:hover img { filter: grayscale(.15); transform: scale(1.035); }
.team-card figure > span { position: absolute; bottom: 12px; left: 12px; padding: 4px 7px; color: #fff; background: rgba(9,11,14,.7); font-size: 7px; }
.team-card > div { padding: 18px 4px 0; }
.team-card h3 { margin: 0; font-size: 22px; }
.team-card > div > p { margin: 3px 0 10px; color: var(--red); font-size: 9px; }
.team-card small { color: var(--muted-dark); font-size: 9px; line-height: 1.8; }
.team-manifesto { min-height: 100%; padding: 26px; display: flex; flex-direction: column; color: var(--ink); background: var(--red); border-radius: var(--radius); }
.team-manifesto > span { font-size: 8px; }
.team-manifesto h3 { margin: 70px 0 10px; font-size: 72px; }
.team-manifesto p { margin: 0; color: rgba(255,255,255,.78); font-size: 11px; }
.team-manifesto a { margin-top: auto; padding-top: 40px; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,.3); font-size: 10px; }
.team-manifesto .icon { width: 16px; height: 16px; }

/* ========================================================================== 
   洞察文章
   ========================================================================== */
.journal-section { background: var(--black); }
.journal-list { border-top: 1px solid var(--line); }
.journal-card a { position: relative; min-height: 175px; padding: 28px 70px 28px 0; display: grid; grid-template-columns: 105px 100px minmax(0, 1fr) 300px; align-items: start; gap: 20px; border-bottom: 1px solid var(--line); transition: padding .4s var(--ease), background .35s; }
.journal-card a:hover { padding-left: 18px; background: rgba(255,255,255,.025); }
.journal-card time, .journal-card > a > span { color: var(--muted); font-size: 8px; }
.journal-card > a > span { color: var(--amber); }
.journal-card h3 { margin: 0; font-size: 21px; font-weight: 550; line-height: 1.45; }
.journal-card p { margin: 0; color: var(--muted); font-size: 10px; }
.journal-card .icon { position: absolute; right: 12px; top: 30px; width: 18px; height: 18px; transition: transform .35s var(--ease); }
.journal-card a:hover .icon { transform: translate(5px, -5px); }

/* ========================================================================== 
   联系表单
   ========================================================================== */
.contact-section { color: var(--ink-dark); background: #e7e5dc; overflow: hidden; }
.contact-light { position: absolute; top: -260px; left: 40%; width: 480px; height: 620px; background: radial-gradient(ellipse, rgba(242,184,75,.25), transparent 68%); transform: rotate(17deg); pointer-events: none; }
.contact-grid { position: relative; display: grid; grid-template-columns: minmax(0, .85fr) minmax(480px, 1.15fr); gap: 90px; align-items: start; }
.contact-intro > span { color: var(--red); }
.contact-intro h2 { margin: 18px 0 25px; font-size: 52px; line-height: 1.05; letter-spacing: 0; }
.contact-intro > p { max-width: 430px; margin: 0; color: var(--muted-dark); font-size: 12px; }
.contact-direct { margin-top: 65px; display: grid; gap: 14px; }
.contact-direct a, .contact-direct button { padding: 14px 0; display: grid; color: inherit; background: none; border: 0; border-bottom: 1px solid var(--line-dark); text-align: left; }
.contact-direct small { color: var(--muted-dark); font-size: 8px; }
.contact-direct strong { margin-top: 3px; display: flex; align-items: center; gap: 8px; font-size: 15px; }
.contact-direct .icon { width: 14px; height: 14px; }
.contact-form { padding: 34px; background: rgba(255,255,255,.46); border: 1px solid rgba(20,22,25,.13); border-radius: var(--radius); box-shadow: 0 25px 70px rgba(59,52,37,.1); backdrop-filter: blur(8px); }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.contact-form label { display: grid; gap: 8px; margin-bottom: 24px; color: var(--muted-dark); font-size: 9px; }
.contact-form input, .contact-form select, .contact-form textarea { width: 100%; padding: 0 0 11px; color: var(--ink-dark); background: transparent; border: 0; border-bottom: 1px solid rgba(20,22,25,.25); border-radius: 0; outline: 0; }
.contact-form textarea { min-height: 120px; resize: vertical; }
.contact-form input:focus, .contact-form select:focus, .contact-form textarea:focus { border-color: var(--red); }
.contact-form .is-invalid { border-color: var(--red); box-shadow: 0 1px 0 var(--red); }
.form-bottom { margin-top: 8px; display: grid; grid-template-columns: 1fr auto; gap: 20px; align-items: end; }
.budget-field { margin: 0 !important; }
.submit-button { min-width: 190px; min-height: 54px; padding: 0 18px; display: flex; align-items: center; justify-content: space-between; color: #fff; background: var(--ink-dark); border: 0; border-radius: 3px; font-size: 10px; transition: background .3s, transform .3s var(--ease); }
.submit-button:hover { background: var(--red); transform: translateY(-2px); }
.submit-button .icon { width: 16px; height: 16px; }
.form-note { margin: 24px 0 0; color: var(--muted-dark); font-size: 8px; }

/* ========================================================================== 
   页脚
   ========================================================================== */
.site-footer { padding: 70px 0 26px; background: #050607; }
.footer-top { padding-bottom: 70px; display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: start; gap: 40px; border-bottom: 1px solid var(--line); }
.footer-brand { justify-self: start; }
.footer-top > p { margin: 0; color: var(--muted); font-size: 12px; }
.footer-top > div { display: grid; gap: 8px; justify-items: end; font-size: 11px; }
.footer-top button { padding: 0; color: var(--amber); background: none; border: 0; }
.footer-bottom { padding-top: 23px; display: flex; justify-content: space-between; gap: 24px; color: #696d71; font-size: 8px; }
.footer-bottom p { margin: 0; }

/* ========================================================================== 
   弹窗与提示
   ========================================================================== */
.media-modal, .project-modal { position: fixed; z-index: 400; inset: 0; padding: 28px; display: grid; place-items: center; }
.modal-backdrop { position: absolute; inset: 0; width: 100%; height: 100%; background: rgba(2,3,4,.88); border: 0; backdrop-filter: blur(12px); }
.showreel-dialog { position: relative; z-index: 1; width: min(1100px, 100%); opacity: 0; transform: translateY(24px) scale(.985); animation: modal-in .55s .05s var(--ease) forwards; }
.showreel-dialog header, .showreel-dialog footer { display: flex; align-items: flex-end; justify-content: space-between; gap: 20px; }
.showreel-dialog header { margin-bottom: 14px; }
.showreel-dialog header span, .showreel-dialog footer { color: var(--muted); font-size: 8px; }
.showreel-dialog h2 { margin: 2px 0 0; font-size: 34px; line-height: 1; }
.showreel-dialog header button, .project-close { width: 42px; height: 42px; padding: 0; display: grid; place-items: center; color: #fff; background: transparent; border: 1px solid var(--line); border-radius: 50%; }
.showreel-frame { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: #000; }
.showreel-frame video { width: 100%; height: 100%; object-fit: contain; }
.showreel-frame > span { position: absolute; right: 12px; top: 10px; color: rgba(255,255,255,.5); font-family: ui-monospace, monospace; font-size: 8px; pointer-events: none; }
.showreel-dialog footer { margin-top: 12px; }
.showreel-dialog footer p { margin: 0; }

.project-dialog { position: relative; z-index: 1; width: min(1050px, 100%); max-height: calc(100dvh - 56px); display: grid; grid-template-columns: 1.15fr .85fr; color: var(--ink-dark); background: var(--panel-light); border-radius: var(--radius); overflow: auto; box-shadow: var(--shadow); opacity: 0; transform: scale(.97); animation: project-in .55s .04s var(--ease) forwards; }
.project-dialog > figure { min-height: 570px; margin: 0; }
.project-dialog > figure img { width: 100%; height: 100%; object-fit: cover; }
.project-dialog-copy { padding: 70px 48px 42px; display: flex; flex-direction: column; }
.project-dialog-copy > span { color: var(--red); font-size: 8px; }
.project-dialog-copy h2 { margin: 14px 0 25px; font-size: 45px; line-height: 1; }
.project-dialog-copy > p { margin: 0; color: var(--muted-dark); font-size: 12px; line-height: 1.9; }
.project-dialog-copy dl { margin: 36px 0; border-top: 1px solid var(--line-dark); }
.project-dialog-copy dl div { padding: 13px 0; display: grid; grid-template-columns: 90px 1fr; border-bottom: 1px solid var(--line-dark); font-size: 9px; }
.project-dialog-copy dt { color: var(--muted-dark); }
.project-dialog-copy dd { margin: 0; }
.project-dialog-copy > a { margin-top: auto; padding-top: 16px; display: flex; justify-content: space-between; border-top: 1px solid var(--ink-dark); font-size: 10px; }
.project-dialog-copy .icon { width: 16px; height: 16px; }
.project-close { position: absolute; z-index: 2; top: 14px; right: 14px; color: var(--ink-dark); border-color: var(--line-dark); }

.toast { position: fixed; z-index: 500; right: 24px; bottom: 24px; max-width: min(360px, calc(100vw - 32px)); padding: 12px 16px; color: var(--black); background: var(--amber); border-radius: 3px; box-shadow: var(--shadow); font-size: 10px; opacity: 0; visibility: hidden; transform: translateY(14px); transition: .3s var(--ease); }
.toast.show { opacity: 1; visibility: visible; transform: none; }

/* ========================================================================== 
   动画关键帧
   ========================================================================== */
@keyframes hero-title-in { to { transform: translateY(0); } }
@keyframes fade-down { to { opacity: 1; transform: none; } }
@keyframes ticker { to { transform: translateX(-50%); } }
@keyframes reel-spin { to { transform: rotate(360deg); } }
@keyframes detail-open { from { opacity: 0; transform: translateY(-8px); } }
@keyframes modal-in { to { opacity: 1; transform: none; } }
@keyframes project-in { to { opacity: 1; transform: none; } }

/* ========================================================================== 
   响应式布局
   ========================================================================== */
@media (max-width: 1100px) {
  :root { --header-height: 74px; }
  .page-shell { width: min(calc(100% - 44px), var(--shell)); }
  .desktop-nav { display: none; }
  .menu-toggle { display: grid; }
  .hero h1 { font-size: 76px; }
  .about-grid { grid-template-columns: 180px minmax(0, 1fr); gap: 40px; }
  .about-copy h2 { font-size: 41px; }
  .services-grid { grid-template-columns: 320px minmax(0, 1fr); gap: 60px; }
  .team-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 45px 15px; }
  .team-manifesto { min-height: 500px; }
  .journal-card a { grid-template-columns: 90px 90px minmax(0,1fr); }
  .journal-card p { display: none; }
  .contact-grid { grid-template-columns: 1fr 1.2fr; gap: 50px; }
}

@media (max-width: 800px) {
  .section { padding: 96px 0; }
  .site-header { padding-inline: 22px; grid-template-columns: 1fr auto; }
  .header-contact { display: none; }
  .hero { min-height: 90svh; }
  .hero-content { min-height: 90svh; padding-bottom: 58px; }
  .hero h1 { font-size: 58px; line-height: .96; }
  .title-offset { padding-left: 6%; }
  .hero-lower { align-items: flex-start; flex-direction: column; gap: 24px; }
  .hero-buttons { width: 100%; justify-content: space-between; }
  .sound-toggle { left: 22px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .section-heading h2 { font-size: 44px; }
  .about-grid { grid-template-columns: 1fr; }
  .section-index { grid-row: auto; }
  .section-index > p { display: none; }
  .about-copy h2 { font-size: 38px; }
  .stat-grid { grid-column: auto; grid-template-columns: repeat(2, 1fr); }
  .stat-grid article:nth-child(2) { border-right: 0; }
  .stat-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line-dark); }
  .stat-grid article:first-child { padding-left: 18px; }
  .services-grid { grid-template-columns: 1fr; }
  .services-intro { position: static; }
  .reel-visual { display: none; }
  .process-track { grid-template-columns: 1fr; gap: 0; margin-top: 50px; }
  .process-track::before { top: 0; bottom: 0; left: 6px; width: 1px; height: auto; }
  .process-track li { padding: 0 0 42px 45px; }
  .process-track li > i { position: absolute; top: 4px; left: 0; margin: 0; }
  .process-track p { margin-bottom: 10px; }
  .contact-grid { grid-template-columns: 1fr; }
  .contact-direct { margin-top: 35px; }
  .footer-top { grid-template-columns: 1fr 1fr; }
  .footer-top > div { grid-column: 1 / -1; justify-items: start; }
  .project-dialog { grid-template-columns: 1fr; }
  .project-dialog > figure { min-height: 320px; max-height: 42vh; }
  .project-dialog-copy { padding: 36px 28px; }
}

@media (max-width: 600px) {
  :root { --header-height: 66px; }
  .page-shell { width: calc(100% - 28px); }
  .section { padding: 78px 0; }
  .site-header { padding-inline: 14px; }
  .site-header.is-scrolled { height: 60px; }
  .brand-mark { width: 37px; height: 37px; }
  .brand-copy strong { font-size: 13px; }
  .brand-copy small { font-size: 7px; }
  .menu-toggle { width: 38px; height: 38px; }
  .mobile-menu { padding: 94px 18px 26px; }
  .mobile-menu nav a { min-height: 58px; font-size: 21px; }
  .mobile-menu footer { align-items: flex-start; flex-direction: column; }
  .hero { min-height: 88svh; }
  .hero-content { min-height: 88svh; padding-top: 100px; padding-bottom: 52px; }
  .hero-kicker span:last-child { display: none; }
  .hero-eyebrow { font-size: 9px; }
  .hero h1 { font-size: 43px; }
  .title-offset { padding-left: 0; }
  .hero-lower > p { font-size: 11px; }
  .hero-lower > p br { display: none; }
  .hero-buttons { align-items: flex-start; flex-direction: column; gap: 16px; }
  .play-button > span { width: 43px; height: 43px; }
  .hero-side-note { display: none; }
  .sound-toggle { bottom: 17px; left: 14px; }
  .film-ticker { min-height: 58px; }
  .ticker-track { gap: 18px; }
  .ticker-track span { font-size: 11px; }
  .section-heading { margin-bottom: 38px; }
  .section-heading h2 { font-size: 36px; }
  .about-copy h2 { font-size: 31px; }
  .about-copy .lead { margin-top: 25px; font-size: 13px; }
  .stat-grid article { min-height: 145px; padding: 20px 12px !important; }
  .stat-grid strong { font-size: 38px; }
  .stat-grid span { margin-top: 23px; }
  .work-toolbar { align-items: flex-start; flex-direction: column; gap: 0; }
  .work-filters { width: 100%; gap: 22px; }
  .work-toolbar > span { padding-bottom: 12px; }
  .work-grid { grid-template-columns: 1fr; gap: 48px; }
  .work-card figure, .work-wide figure { aspect-ratio: 4 / 5; }
  .work-info h3 { font-size: 25px; }
  .services-intro h2, .contact-intro h2 { font-size: 36px; }
  .service-item > button { min-height: 82px; grid-template-columns: 35px 1fr 20px; }
  .service-item > button h3 { font-size: 18px; }
  .service-detail { padding: 0 0 28px 47px; }
  .team-grid { grid-template-columns: 1fr; }
  .team-card figure { aspect-ratio: 5 / 6; }
  .team-manifesto { min-height: 440px; }
  .journal-card a { min-height: 160px; padding-right: 38px; grid-template-columns: 86px 1fr; gap: 10px; }
  .journal-card > a > span { text-align: right; }
  .journal-card h3 { grid-column: 1 / -1; font-size: 17px; }
  .journal-card .icon { right: 2px; }
  .contact-form { padding: 24px 18px; }
  .form-row, .form-bottom { grid-template-columns: 1fr; gap: 0; }
  .submit-button { width: 100%; margin-top: 16px; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-top > div { grid-column: auto; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
  .footer-bottom p:nth-child(2) { display: none; }
  .media-modal, .project-modal { padding: 12px; }
  .showreel-dialog h2 { font-size: 25px; }
  .showreel-dialog footer { align-items: flex-start; flex-direction: column; }
  .project-dialog { max-height: calc(100dvh - 24px); }
  .project-dialog > figure { min-height: 250px; }
  .project-dialog-copy h2 { font-size: 34px; }
  .toast { right: 14px; bottom: 14px; }
}

/* 用户要求减弱动效时：停止循环动画、取消视差、直接展示内容。 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .ticker-track, .reel-ring { animation: none !important; }
  .reveal, .reveal-from-top { opacity: 1; transform: none; }
  .title-line b { transform: none; }
  .hero-video { transform: none !important; }
  .particle-canvas { display: none; }
}

/* 打印时隐藏视频、动画与交互层，仅保留主要公司信息。 */
@media print {
  .site-header, .hero-video, .particle-canvas, .global-grain, .scroll-progress, .film-ticker, .media-modal, .project-modal, .toast, .sound-toggle { display: none !important; }
  body, .section, .site-footer { color: #111 !important; background: #fff !important; }
  .hero, .hero-content { min-height: auto; color: #111; }
  .hero-content { padding: 40px 0; }
  .reveal { opacity: 1; transform: none; }
}