/* ============================================================
   荔影枝下 Lyfilm Studio
   深色电影感重设计 · 炭黑 / 深墨绿 / 胶片白 / 低饱和暖金与暗红
   核心叙事：光从「关于我们」落下，向下扩散、变暗、变宽
   原生 CSS，无框架依赖；轮播 / 断点 / 类名钩子保持兼容
   ============================================================ */

:root {
  --ink: #050705;            /* 片基黑 */
  --coal: #0a0c0a;           /* 炭黑 */
  --ink-green: #0d1410;      /* 深墨绿 */
  --moss: #16211a;           /* 被光照起的绿 */
  --paper: #e9e1cf;          /* 胶片白 */
  --paper-dim: rgba(233, 225, 207, 0.62);
  --paper-faint: rgba(233, 225, 207, 0.38);
  --gold: #a88650;           /* 低饱和暖金 */
  --red: #7c2a21;            /* 暗红 */
  --line: rgba(233, 225, 207, 0.12);
  --line-soft: rgba(233, 225, 207, 0.07);
  --glow: rgba(233, 225, 207, 0.9);
  --beam-tilt: 0deg;         /* 由 JS 随滚动微调 */
  --haze-drift: 0px;         /* 由 JS 随滚动微调 */
  --beam-dim: 1;             /* 由 JS 随滚动微调 */
  --mouse-tilt: 0deg;        /* 由 JS 随鼠标缓动 */
  --mouse-x: 0px;            /* 由 JS 随鼠标缓动 */
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-hand: "Long Cang", "Zhi Mang Xing", "Noto Serif SC", "Songti SC", cursive;
  --font-mono: "Space Mono", "Noto Sans SC", monospace;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

/* 移动端点按时不出现系统默认的蓝色高亮块（点轮播图会闪一块蓝，很出戏）。
   铺到每一个元素：微信 X5、Via（系统 WebView）等内核不继承
   html 上的设置，部分只认被点元素自身的声明，通配符一次兜住 */
*,
html {
  -webkit-tap-highlight-color: transparent;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-sans);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 图片不可被长按选中 / 弹保存菜单——轮播和封面都是「画面」不是「内容」。
   例外：.join-qr 招新群二维码必须保留长按识别（微信里长按扫码进群） */
img {
  max-width: 100%;
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
  -webkit-user-drag: none;
}

/* 画面类图片不接收触摸/鼠标事件：事件直接落到容器上，
   微信 X5 等内核的长按图片菜单因此不会被触发（二维码除外）。
   注意：各区块的点击切换 / 跳转逻辑都挂在容器上，不受影响 */
.panel img,
.frag-photo img,
.film img,
.backstage-item img,
.hero-logo,
.identity-logo,
.light-tail {
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }

::selection { background: rgba(168, 134, 80, 0.4); color: var(--paper); }

a:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 4px;
}

/* ---------- 全站胶片氛围：暗角 + 颗粒 ---------- */
/* 暗角：固定径向渐层，让观众视线始终聚向画面中央 */

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 80;
  pointer-events: none;
  background: radial-gradient(ellipse 120% 90% at 50% 42%, transparent 58%, rgba(0, 0, 0, 0.42) 100%);
}

/* 颗粒：小尺寸 SVG 噪点平铺 + 阶梯式跳帧，模拟胶片颗粒的轻微浮动 */

body::after {
  content: "";
  position: fixed;
  inset: -100px;
  z-index: 81;
  pointer-events: none;
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain-jitter 0.9s steps(4) infinite;
}

@keyframes grain-jitter {
  0%   { transform: translate(0, 0); }
  25%  { transform: translate(-32px, 18px); }
  50%  { transform: translate(24px, -28px); }
  75%  { transform: translate(-14px, -12px); }
  100% { transform: translate(0, 0); }
}

/* ---------- 页眉 ---------- */

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 20;
  height: 76px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 32px;
  border-bottom: 1px solid transparent;
  transition: background-color 0.5s ease, border-color 0.5s ease, backdrop-filter 0.5s ease;
}

.site-header.is-scrolled {
  background: rgba(5, 7, 5, 0.82);
  border-bottom-color: var(--line-soft);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.brand { display: block; width: 124px; }
.brand img { display: block; width: 100%; height: auto; }

.site-header nav {
  display: flex;
  gap: 34px;
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.28em;
}

.site-header nav a {
  position: relative;
  padding: 6px 0;
  opacity: 0.78;
  transition: opacity 0.3s ease;
}

.site-header nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}

.site-header nav a:hover { opacity: 1; }
.site-header nav a:hover::after { transform: scaleX(1); }

/* 招新入口：像一张克制的入场券 */

.entry {
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 10px 16px;
  color: var(--paper);
  border: 1px solid rgba(233, 225, 207, 0.4);
  background: rgba(233, 225, 207, 0.03);
  transition: background-color 0.35s ease, color 0.35s ease, border-color 0.35s ease;
}

.entry:hover {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}

/* ---------- 首页轮播（布局与表现方式保持原样，仅换为中性暗调遮罩） ---------- */

.opening {
  position: relative;
  height: 100svh;
  min-height: 640px;
  overflow: hidden;
  background: var(--ink);
}

.carousel,
.panel {
  position: absolute;
  inset: 0;
}

/* 首页轮播支持点击切换到下一张（监听器挂在 .opening 上，光标提示也放在整屏） */
.opening { cursor: pointer; }

.carousel-portrait { display: none; }

.panel {
  margin: 0;
  opacity: 0;
  transition: opacity 1.9s ease;
  will-change: opacity;
}

.panel.is-active { opacity: 1; }

.panel img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.66) contrast(1.08) brightness(0.74);
  transform: scale(1.02);
  transition: transform 8.5s ease-out;
  will-change: transform;
}

.panel.is-active img { transform: scale(1.075); }

.opening::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(5, 7, 5, 0.34), rgba(5, 7, 5, 0.1) 32%, rgba(5, 7, 5, 0.14) 68%, rgba(5, 7, 5, 0.5));
}

.hero-logo {
  position: absolute;
  z-index: 3;
  left: 50%;
  top: 50%;
  width: min(58vw, 860px);
  height: auto;
  transform: translate(-50%, -50%);
  filter: drop-shadow(0 6px 26px rgba(0, 0, 0, 0.45));
  animation: hero-logo-in 2.4s var(--ease-out) 0.3s both;
}

@keyframes hero-logo-in {
  from { opacity: 0; transform: translate(-50%, calc(-50% + 14px)); }
  to   { opacity: 1; transform: translate(-50%, -50%); }
}

/* ---------- 关于：整页光源的起点 ---------- */
/* 一束柔和的舞台 / 放映机顶光从上方落下，带空气感与雾化感 */

.identity {
  position: relative;
  min-height: 92svh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 6vw 6vw 7vw;
  text-align: center;
  background:
    radial-gradient(ellipse 90% 55% at 50% 0%, rgba(168, 134, 80, 0.07) 0%, transparent 60%),
    linear-gradient(180deg, #060806 0%, var(--coal) 45%, var(--ink-green) 100%);
  overflow: hidden;
}

/* 光锥本体：真实灯光照片按高度自然比例呈现（不再强行铺满拉伸），
   边缘经预处理羽化压黑 + screen 混合，与页面底色无缝衔接；
   图片高光经肩部曲线压缩，避免芯部死白的塑料感 */

.light { position: absolute; inset: 0; pointer-events: none; }

.beam-photo {
  position: absolute;
  top: 68px;
  left: 50%;
  width: auto;
  height: calc(100% - 68px);
  max-width: none;
  transform: translateX(calc(-50% + var(--mouse-x) * 1.5)) scale(1.05) rotate(calc(var(--beam-tilt) + var(--mouse-tilt)));
  transform-origin: 50% 0%;
  mix-blend-mode: screen;
  opacity: calc(0.82 * var(--beam-dim));
  filter: brightness(0.94);
  -webkit-mask-image: linear-gradient(180deg, #000 62%, transparent 97%);
          mask-image: linear-gradient(180deg, #000 62%, transparent 97%);
}

/* 丁达尔流动雾光：明雾（screen）贴着光束边缘增亮，暗雾（normal）横穿
   光束核心压低亮度——一亮一暗，亮度被真实调制，流动肉眼可见。
   所有雾团边缘羽化到透明，无硬分界；容器跟随光束倾斜与横移变量 */

.flow {
  position: absolute;
  top: 68px;
  left: 50%;
  width: 74vmin;
  height: calc(100% - 68px);
  transform: translateX(calc(-50% + var(--mouse-x) * 1.5)) rotate(calc(var(--beam-tilt) + var(--mouse-tilt)));
  transform-origin: 50% 0%;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 8%, #000 55%, transparent 88%);
          mask-image: linear-gradient(180deg, transparent 0%, #000 8%, #000 55%, transparent 88%);
}

.flow-light {
  mix-blend-mode: screen;
  opacity: calc(0.9 * var(--beam-dim));
}

.flow-dark { opacity: calc(0.8 * var(--beam-dim)); }

.flow i {
  position: absolute;
  display: block;
  border-radius: 50%;
}

.flow-light i {
  background: radial-gradient(ellipse at center, rgba(233, 225, 207, 0.17) 0%, rgba(233, 225, 207, 0.06) 45%, transparent 68%);
  filter: blur(18px);
}

/* 暗雾：半透明炭黑雾团，正常混合，横穿光束时压出可见的明暗流动 */

.flow-dark i {
  background: radial-gradient(ellipse at center, rgba(3, 4, 3, 0.5) 0%, rgba(3, 4, 3, 0.22) 45%, transparent 70%);
  filter: blur(20px);
}

/* 明雾贴光束边缘（溢出到暗背景才看得见），暗雾横扫光束核心；
   周期互质（13s / 19s / 23s / 29s），叠加形态约 21 万秒才重复 */

.flow-light i:nth-child(1) {
  width: 76%; height: 26%;
  top: 10%; left: -6%;
  animation: flow-a 13s ease-in-out infinite alternate;
}

.flow-light i:nth-child(2) {
  width: 80%; height: 28%;
  top: 38%; left: 10%;
  animation: flow-c 23s ease-in-out infinite alternate;
}

.flow-dark i:nth-child(1) {
  width: 62%; height: 22%;
  top: 20%; left: 19%;
  animation: flow-b 19s ease-in-out infinite alternate;
}

.flow-dark i:nth-child(2) {
  width: 70%; height: 26%;
  top: 52%; left: 15%;
  animation: flow-d 29s ease-in-out infinite alternate;
}

@keyframes flow-a {
  from { transform: translate(-14%, -6%) scale(1); opacity: 0.7; }
  50%  { transform: translate(10%, 6%) scale(1.14); opacity: 1; }
  to   { transform: translate(16%, -3%) scale(0.92); opacity: 0.6; }
}

@keyframes flow-b {
  from { transform: translate(16%, 5%) scale(1.06); opacity: 0.9; }
  50%  { transform: translate(-12%, -7%) scale(0.9); opacity: 0.55; }
  to   { transform: translate(-17%, 6%) scale(1.12); opacity: 0.85; }
}

@keyframes flow-c {
  from { transform: translate(-12%, 7%) scale(0.94); opacity: 0.55; }
  50%  { transform: translate(14%, -5%) scale(1.12); opacity: 0.95; }
  to   { transform: translate(-16%, -6%) scale(1.03); opacity: 0.7; }
}

@keyframes flow-d {
  from { transform: translate(13%, -5%) scale(1.1); opacity: 0.75; }
  50%  { transform: translate(-14%, 6%) scale(0.92); opacity: 1; }
  to   { transform: translate(17%, 7%) scale(1.06); opacity: 0.6; }
}

/* 光尘：悬浮在光束里的微粒，缓慢漂移，给光一点「空气」 */

.dust {
  position: absolute;
  top: 8%;
  left: 50%;
  width: 46vw;
  max-width: 620px;
  height: 84%;
  transform: translateX(-50%);
  background-image:
    radial-gradient(circle 1.5px at 22% 18%, rgba(233, 225, 207, 0.5) 40%, transparent 70%),
    radial-gradient(circle 1px at 64% 30%, rgba(233, 225, 207, 0.42) 40%, transparent 70%),
    radial-gradient(circle 2px at 42% 46%, rgba(233, 225, 207, 0.36) 40%, transparent 70%),
    radial-gradient(circle 1.2px at 78% 58%, rgba(233, 225, 207, 0.4) 40%, transparent 70%),
    radial-gradient(circle 1.6px at 30% 70%, rgba(233, 225, 207, 0.3) 40%, transparent 70%),
    radial-gradient(circle 1px at 56% 82%, rgba(233, 225, 207, 0.34) 40%, transparent 70%);
  background-repeat: no-repeat;
  filter: blur(0.6px);
  mix-blend-mode: screen;
  opacity: calc(0.55 * var(--beam-dim));
  animation: dust-drift 26s ease-in-out infinite alternate;
}

@keyframes dust-drift {
  from { transform: translateX(-52%) translateY(0); }
  50%  { transform: translateX(-48%) translateY(-1.6%); }
  to   { transform: translateX(-51%) translateY(1.2%); }
}

/* 光雾：顶部一团缓慢漂移的雾化光晕 */

.light-haze {
  position: absolute;
  top: -22%;
  left: 50%;
  width: 130vw;
  height: 80%;
  transform: translateX(calc(-50% + var(--haze-drift) + var(--mouse-x) * 0.5));
  background: radial-gradient(ellipse 50% 60% at 50% 30%, rgba(233, 225, 207, calc(0.09 * var(--beam-dim))) 0%, transparent 70%);
  filter: blur(30px);
  mix-blend-mode: screen;
}

/* 光池：光束落在「地面」上的一小片亮 */

.light-pool {
  position: absolute;
  left: 50%;
  bottom: -8%;
  width: 88vw;
  height: 34%;
  transform: translateX(calc(-50% + var(--mouse-x)));
  background: radial-gradient(ellipse 50% 55% at 50% 50%, rgba(233, 225, 207, calc(0.07 * var(--beam-dim))) 0%, transparent 70%);
  filter: blur(22px);
  mix-blend-mode: screen;
}

/* 光的延伸：同一束光向下漏进后续段落，逐段变宽、变模糊、变暗 */

.light-tail {
  position: absolute;
  top: -8%;
  left: 50%;
  width: auto;
  max-width: none;
  /* 与第二页光束同源摆动：横向平移 + 按比例旋转（--tail-swing），
     延伸越远摆动越弱，像同一盏灯的余光惯性衰减 */
  transform: translateX(calc(-50% + var(--mouse-x) * 0.35))
             rotate(calc((var(--beam-tilt) + var(--mouse-tilt)) * var(--tail-swing, 0.45)));
  transform-origin: 50% 0%;
  mix-blend-mode: screen;
  pointer-events: none;
}

.light-tail-gallery {
  --tail-swing: 0.45;
  height: 88%;
  opacity: calc(0.34 * var(--beam-dim));
  filter: blur(26px) brightness(0.9);
  -webkit-mask-image: linear-gradient(180deg, #000 34%, transparent 80%);
          mask-image: linear-gradient(180deg, #000 34%, transparent 80%);
}

.light-tail-archive {
  --tail-swing: 0.3;
  height: 78%;
  opacity: calc(0.24 * var(--beam-dim));
  filter: blur(34px) brightness(0.85);
  -webkit-mask-image: linear-gradient(180deg, #000 30%, transparent 72%);
          mask-image: linear-gradient(180deg, #000 30%, transparent 72%);
}

/* 原有细环保留，调得更暗，像放映厅穹顶的轮廓 */

.identity::before {
  content: "";
  position: absolute;
  inset: 9vw;
  border: 1px solid rgba(233, 225, 207, 0.06);
  border-radius: 50%;
}

.identity-logo {
  position: relative;
  width: min(46vw, 520px);
  height: auto;
  filter: drop-shadow(0 10px 44px rgba(0, 0, 0, 0.55));
}

/* ---------- 光束照亮文字 ---------- */
/* 介绍片段在文档流中错落排布（永不重叠），--lit（0→1，由 JS 按片段到
   光柱中心线的距离每帧驱动）决定亮度与光晕，默认压暗到若隐若现 */

.identity { min-height: 100svh; justify-content: flex-start; }

.intro-field {
  position: relative;
  width: min(100%, 1280px);
  margin-top: clamp(28px, 3.5vw, 56px);
  padding-bottom: 2vh;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.intro-field .lit-frag {
  --lit: 0;
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 300;
  color: rgba(233, 225, 207, calc(0.08 + 0.92 * var(--lit)));
  text-shadow:
    /* 暗色衬底（画在光晕之上、紧贴字形）：光芯最强处文字也不会被亮背景吃掉，
       像放映机强光里字幕的深色勾边；未点亮时只剩 2px 的极淡衬边 */
    0 0 calc(2px + 2px * var(--lit)) rgba(6, 8, 6, calc(0.16 + 0.5 * var(--lit))),
    0 0 calc(10px * var(--lit)) rgba(6, 8, 6, calc(0.5 * var(--lit))),
    0 2px calc(24px * var(--lit)) rgba(6, 8, 6, calc(0.45 * var(--lit))),
    /* 原有的「被点亮」光晕 */
    0 0 calc(18px * var(--lit)) rgba(255, 250, 235, calc(0.8 * var(--lit))),
    0 0 calc(48px * var(--lit)) rgba(233, 225, 207, calc(0.5 * var(--lit)));
  transition: color 0.25s linear, text-shadow 0.25s linear;
}

.intro-field .lit-frag em {
  font-style: normal;
  color: rgba(168, 134, 80, calc(0.3 + 0.7 * var(--lit)));
}

/* 定位引言：靠左，整页最大的正文，像场记板上的第一句话 */

.intro-field .frag-intro {
  align-self: flex-start;
  max-width: 46%;
  font-size: clamp(18px, 1.7vw, 27px);
  line-height: 2;
  letter-spacing: 0.1em;
}

/* 过渡句：靠右，小字，像换场 */

.intro-field .frag-bridge {
  align-self: flex-end;
  max-width: 34%;
  font-size: clamp(13px, 1.15vw, 18px);
  line-height: 2;
  letter-spacing: 0.18em;
  text-align: right;
}

/* 三行创作流程：片尾职表式编号 + 左右错落 */

.intro-field .frag-step {
  max-width: 34%;
  font-size: clamp(14px, 1.25vw, 19px);
  line-height: 2;
  letter-spacing: 0.12em;
}

.intro-field .frag-step .frag-no {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  color: rgba(168, 134, 80, calc(0.3 + 0.7 * var(--lit)));
}

.intro-field .frag-s1 { align-self: flex-start; margin-left: 8%; }
.intro-field .frag-s2 { align-self: flex-end; margin-right: 6%; }
.intro-field .frag-s3 { align-self: flex-start; margin-left: 16%; max-width: 38%; }

/* 信念收尾：居中收拢，整页情绪的落点 */

.intro-field .frag-creed {
  align-self: center;
  max-width: 72%;
  font-size: clamp(15px, 1.4vw, 21px);
  line-height: 2.05;
  letter-spacing: 0.2em;
  text-align: center;
}

/* 往日照片：35mm 胶片边框（上下齿孔条），与文字同享 --lit 照亮逻辑 */

.intro-field .frag-photo {
  position: relative;
  width: 34%;
  padding: 18px 8px;
  background: #090a08;
  border: 1px solid rgba(233, 225, 207, 0.14);
  box-shadow: 0 18px 54px rgba(0, 0, 0, 0.55);
}

/* 齿孔：上下两条重复圆孔，胶片片的标志性穿孔 */

.intro-field .frag-photo::before,
.intro-field .frag-photo::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  height: 6px;
  background-image: radial-gradient(circle 2.2px at 8px 50%, rgba(233, 225, 207, 0.32) 96%, transparent 100%);
  background-size: 22px 6px;
  background-repeat: repeat-x;
}

.intro-field .frag-photo::before { top: 6px; }
.intro-field .frag-photo::after { bottom: 6px; }

.intro-field .frag-photo img {
  display: block;
  width: 100%;
  height: auto;
  filter: brightness(calc(0.24 + 0.76 * var(--lit))) saturate(calc(0.6 + 0.4 * var(--lit)));
  transition: filter 0.25s linear;
}

.intro-field .ph-l { align-self: flex-start; margin-left: 10%; }
.intro-field .ph-r { align-self: flex-end; margin-right: 8%; }
.intro-field .ph-c { align-self: center; }
.intro-field .ph-portrait { width: 24%; }
.intro-field .ph-wide { width: 40%; }

/* 桌面端精细指针：自由散落布局——无网格行列限制，文字与照片按设计坐标
   绝对定位在 16:29 的画布上（1280×2320 参考系）；中小屏与触屏保持上方 flex 单列 */

@media (min-width: 900px) and (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference) {
  .intro-field {
    display: block;
    aspect-ratio: 16 / 29;
    padding-bottom: 0;
  }

  .intro-field > * {
    position: absolute;
    margin: 0;
    max-width: none;
  }

  /* .frag-photo 自带 position: relative（胶片边框定位用），特异性更高，需显式压平 */
  .intro-field > .frag-photo { position: absolute; }

  /* 各元素坐标（% 基于 1280×2320 参考画布） */
  .intro-field > .frag-intro   { left: 4%;  top: 4%;  width: 38%; text-align: left; }
  .intro-field > :nth-child(2)  { left: 52%; top: 1%;  width: 44%; }   /* 照片 01 */
  .intro-field > :nth-child(4)  { left: 4%;  top: 19%; width: 42%; }   /* 照片 02 */
  .intro-field > .frag-bridge  { left: 54%; top: 22%; width: 38%; }
  .intro-field > .frag-s1      { left: 4%;  top: 39%; width: 34%; text-align: left; }
  .intro-field > :nth-child(6)  { left: 50%; top: 30%; width: 25%; }   /* 照片 03 竖图 */
  .intro-field > .frag-s2      { left: 79%; top: 33%; width: 18%; text-align: left; }
  .intro-field > :nth-child(8)  { left: 4%;  top: 48%; width: 42%; }   /* 照片 04 */
  .intro-field > .frag-s3      { left: 52%; top: 55%; width: 40%; text-align: left; }
  .intro-field > :nth-child(10) { left: 54%; top: 63%; width: 42%; }   /* 照片 05 */
  .intro-field > :nth-child(11) { left: 4%;  top: 69%; width: 42%; }   /* 照片 06 */
  .intro-field > :nth-child(13) { left: 52%; top: 82%; width: 44%; }   /* 照片 07 */
  .intro-field > .frag-creed   { left: 4%;  top: 85%; width: 42%; text-align: left; }
}

/* 触屏 / 窄屏 / 减少动态：没有鼠标追光，片段保持可读的固定暗度，退回静态排版 */

@media (hover: none), (max-width: 640px), (prefers-reduced-motion: reduce) {
  .identity { min-height: 0; }

  .intro-field {
    display: flex;
    flex-direction: column;
    gap: 32px;
    padding: 0 4vw 6vh;
  }

  .intro-field .lit-frag {
    max-width: 100%;
    margin-left: 0;
    margin-right: 0;
    align-self: center;
    color: rgba(233, 225, 207, 0.72);
    /* 没有追光点亮的设备上，改为一层常显的轻薄暗衬边，光束扫过字面时仍看得清 */
    text-shadow:
      0 0 3px rgba(6, 8, 6, 0.35),
      0 0 12px rgba(6, 8, 6, 0.3);
    text-align: center;
  }

  .intro-field .lit-frag em { color: var(--gold); }

  .intro-field .frag-step .frag-no { color: var(--gold); }

  .intro-field .frag-creed { transform: none; }

  /* 照片在触屏下不受追光控制，保持常亮可读 */

  .intro-field .frag-photo {
    width: 84%;
    margin-left: 0;
    margin-right: 0;
    align-self: center;
  }

  .intro-field .ph-portrait { width: 64%; }

  .intro-field .frag-photo img { filter: brightness(0.92) saturate(0.95); }
}

/* ---------- 作品：光向下扩散到这里，仍有余温 ---------- */

.gallery {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  column-gap: 2vw;
  padding: 15vw 8vw 13vw;
  background: linear-gradient(180deg, var(--ink-green) 0%, var(--coal) 30%, var(--ink) 100%);
}

/* 上方段落漏下来的余光：比「关于」更弱、更宽 */

.gallery::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 46%;
  pointer-events: none;
  background: radial-gradient(ellipse 75% 100% at 50% -18%, rgba(233, 225, 207, 0.045) 0%, transparent 68%);
}

.gallery-title {
  grid-column: 1 / 7;
  grid-row: 1;
  align-self: start;
  margin: 0;
  padding-top: 1vw;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(72px, 10.5vw, 168px);
  line-height: 1.16;
  letter-spacing: 0.04em;
  color: var(--paper);
  text-shadow: 0 0 60px rgba(233, 225, 207, 0.12);
}

.art {
  position: relative;
  margin: 0;
}

/* 艺术图画框：与 .film-frame 同源的悬停上浮 / 3D 倾斜 / 光影扫过，
   装裱卡纸与阴影随画框一起浮动 */

.art-frame {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
  transform: perspective(1200px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(var(--lift, 0px));
  transition: transform 0.55s var(--ease-out), box-shadow 0.55s ease;
  will-change: transform;
}

.art:hover .art-frame { --lift: -6px; }

/* 光影扫过：悬停时一道柔光掠过画面 */

.art-frame::after {
  content: "";
  position: absolute;
  inset: -25% -70%;
  z-index: 3;
  background: linear-gradient(105deg, transparent 43%, rgba(233, 225, 207, 0.12) 50%, transparent 57%);
  transform: translateX(-72%);
  transition: transform 1.15s var(--ease-out);
  mix-blend-mode: screen;
  pointer-events: none;
}

.art:hover .art-frame::after { transform: translateX(72%); }

.art img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.06) brightness(0.8);
  transform: scale(1.001);
  transition: filter 0.9s ease, transform 1.4s var(--ease-out);
}

/* 悬停时，照片像被光轻轻照亮 */

.art:hover img {
  filter: saturate(0.82) contrast(1.06) brightness(1);
  transform: scale(1.035);
}

/* 编号 / 片名以胶片注释的方式浮现 */

.art figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  margin: 0;
  padding: 34px 14px 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--paper);
  background: linear-gradient(transparent, rgba(4, 5, 4, 0.72));
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.5s ease, transform 0.5s var(--ease-out);
}

.art:hover figcaption {
  opacity: 1;
  transform: translateY(0);
}

/* 触屏设备没有悬停，注释保持常显但克制 */

@media (hover: none) {
  .art figcaption { opacity: 0.85; transform: none; }
}

.art-small {
  grid-column: 8 / 13;
  grid-row: 1;
  align-self: start;
  margin-top: 7vw;
  aspect-ratio: 0.84;
}

.art-small .art-frame {
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
}

.art-small:hover .art-frame {
  box-shadow: 0 36px 88px rgba(0, 0, 0, 0.7);
}

/* 大幅作品：深色卡纸装裱 + 极细边线，取代旧的金棕厚框 */

.art-large {
  grid-column: 2 / 10;
  grid-row: 2;
  margin-top: 9vw;
  aspect-ratio: 1.27;
}

.art-large .art-frame {
  padding: 10px;
  background: #12140f;
  box-shadow:
    0 0 0 1px rgba(233, 225, 207, 0.09),
    0 36px 90px rgba(0, 0, 0, 0.72);
}

.art-large:hover .art-frame {
  box-shadow:
    0 0 0 1px rgba(233, 225, 207, 0.14),
    0 48px 110px rgba(0, 0, 0, 0.8);
}

.quiet-link {
  grid-column: 10 / 13;
  grid-row: 2;
  align-self: end;
  justify-self: end;
  margin-bottom: 1vw;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--paper-dim);
  border-bottom: 1px solid rgba(168, 134, 80, 0.55);
  padding-bottom: 7px;
  transition: color 0.35s ease, border-color 0.35s ease;
}

.quiet-link:hover {
  color: var(--paper);
  border-color: var(--gold);
}

/* ---------- 档案：影展节目册 / 放映单 ---------- */
/* 光到这里已很微弱，只剩片头的穿孔边与纸面反光 */

/* ---------- 花絮：横向滑动照片墙，自动漂移、可手动滑动 ---------- */

.backstage {
  position: relative;
  padding: 10vw 0 9vw;
  background: linear-gradient(180deg, var(--ink) 0%, var(--ink-green) 60%, var(--ink) 100%);
}

.backstage[hidden] { display: none; }

.backstage-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  padding: 0 5.2vw;
  margin-bottom: 6vh;
}

.backstage-head > span {
  min-width: 148px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.42em;
  color: var(--paper-dim);
}

.backstage-head > span em {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--paper-faint);
}

/* 花絮标题用手写体：「跳动的世界里 找你的频率」是作品《频率》的一句词，
   手写的随意感正对片场花絮的快照气质；整体微斜 1.2°，像随手写在场记板上 */

.backstage h2 {
  margin: 0;
  text-align: right;
  font-family: var(--font-hand);
  font-weight: 400;
  font-size: clamp(26px, 3.8vw, 56px);
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--paper);
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.55);
  transform: rotate(-1.2deg);
}

.backstage-stage {
  position: relative;
}

/* 清单为空时藏起所有时间线装饰，只留纯黑 */

.backstage-stage.is-empty .tl-monitor,
.backstage-stage.is-empty .tl-ruler,
.backstage-stage.is-empty .tl-timecode,
.backstage-stage.is-empty .tl-playhead { display: none; }

/* ===== 桌面端形态：剪辑时间线（NLE） ===== */

/* 节目监视器：播放头压到哪条素材，这里就切到哪条（双图层交叉淡化） */

.tl-monitor {
  display: flex;
  justify-content: center;
  margin: 0 5.2vw 4.5vh;
}

.tl-screen {
  position: relative;
  width: min(620px, 50vw);
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #040504;
  border: 1px solid #1d241d;
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.7), 0 0 90px rgba(216, 90, 70, 0.05);
}

.tl-screen::before {
  content: "PROGRAM";
  position: absolute;
  top: 8px;
  left: 10px;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.3em;
  color: rgba(233, 225, 207, 0.4);
}

/* 扫描线 + 暗角，监视器的 CRT 质感 */

.tl-screen::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.09) 0 1px, transparent 1px 3px),
    radial-gradient(120% 90% at 50% 40%, transparent 55%, rgba(0, 0, 0, 0.42) 100%);
}

.tl-screen-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 0.28s ease;
}

.tl-screen-img.is-front { opacity: 1; }

/* 左下角：当前素材名 */

.tl-screen-clip {
  position: absolute;
  left: 10px;
  bottom: 8px;
  z-index: 3;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: var(--paper);
  background: rgba(4, 5, 4, 0.66);
  border: 1px solid var(--line-soft);
  padding: 3px 9px;
}

/* 时码标尺：密集短刻度 + 每秒长刻度，随轨道滚动同步平移（JS 驱动 background-position） */

.tl-ruler {
  height: 22px;
  margin: 0 5.2vw 12px;
  border-bottom: 1px solid var(--line);
  opacity: 0.55;
  background:
    repeating-linear-gradient(90deg, rgba(233, 225, 207, 0.5) 0 1px, transparent 1px 40px) 0 0 / 100% 10px no-repeat,
    repeating-linear-gradient(90deg, rgba(233, 225, 207, 0.28) 0 1px, transparent 1px 8px) 0 12px / 100% 10px no-repeat;
}

/* 走时码表：REC 红点 + HH:MM:SS:FF，嵌在监视器右下角 */

.tl-timecode {
  position: absolute;
  right: 8px;
  bottom: 8px;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--paper);
  background: rgba(4, 5, 4, 0.72);
  border: 1px solid var(--line-soft);
  padding: 3px 10px;
}

.tl-timecode i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #d85a46;
  box-shadow: 0 0 8px rgba(216, 90, 70, 0.8);
}

@media (prefers-reduced-motion: no-preference) {
  .tl-timecode i { animation: rec-pulse 1.3s ease-in-out infinite; }
}

@keyframes rec-pulse {
  50% { opacity: 0.25; box-shadow: none; }
}

/* 轨道区（标尺 + 素材轨 + 播放头）：播放头相对它定位，只覆盖轨道高度 */

.tl-track { position: relative; }

/* 播放头：固定在 42% 处的红线 + 顶部三角游标，轨道在它下面走 */

.tl-playhead {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 42%;
  width: 2px;
  margin-left: -1px;
  z-index: 3;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(216, 90, 70, 0.95), rgba(216, 90, 70, 0.55));
  box-shadow: 0 0 14px rgba(216, 90, 70, 0.45);
}

.tl-playhead::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  border: 7px solid transparent;
  border-top: 10px solid #d85a46;
}

.backstage-scroller {
  display: flex;
  gap: 12px;
  padding: 0 5.2vw;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
  cursor: grab;              /* 桌面提示可以按住拖动 */
  user-select: none;         /* 拖动时不会选中内容 */
  /* 两端渐隐，照片像从黑暗里滑进来又滑出去 */
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 4vw, #000 calc(100% - 4vw), transparent 100%);
          mask-image: linear-gradient(90deg, transparent 0, #000 4vw, #000 calc(100% - 4vw), transparent 100%);
}

.backstage-scroller.dragging { cursor: grabbing; }

.backstage-scroller::-webkit-scrollbar { display: none; }

.backstage-item {
  margin: 0;
  flex: 0 0 auto;
  position: relative;
}

/* 时间线素材块：顶部场记条 + 画面区，宽度即「时长」（--cw 由 JS 按节奏给出）。
   监视器占据视觉主角后，轨道缩小、下移，像真实剪辑软件的布局 */

@media (min-width: 641px) {
  .backstage-item {
    width: var(--cw, 160px);
    height: clamp(96px, 14vh, 152px);
    overflow: hidden;
    border: 1px solid #232a23;
    border-radius: 4px;
    background: #0b0e0b;
    transition: border-color 0.35s ease, box-shadow 0.35s ease;
  }

  .backstage-item::before {
    content: attr(data-clip);
    display: block;
    height: 20px;
    padding: 4px 8px 0;
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.1em;
    white-space: nowrap;
    overflow: hidden;
    color: rgba(233, 225, 207, 0.45);
    background: #131813;
    border-bottom: 1px solid #232a23;
    transition: color 0.35s ease, background 0.35s ease;
  }

  .backstage-item img {
    display: block;
    width: 100%;
    height: calc(100% - 20px);
    object-fit: cover;
    filter: brightness(0.5) saturate(0.55) contrast(1.02);
    transition: filter 0.4s ease;
  }

  /* 播放头压到的素材：场记条变红、画面全亮，像监视器里的当前帧 */

  .backstage-item.is-live {
    border-color: rgba(216, 90, 70, 0.7);
    box-shadow: 0 0 26px rgba(216, 90, 70, 0.16);
  }

  .backstage-item.is-live::before {
    color: var(--paper);
    background: #401812;
  }

  .backstage-item.is-live img {
    filter: brightness(1) saturate(0.95) contrast(1.04);
  }
}

/* ===== 手机端形态：暗房晾片绳 ===== */

@media (max-width: 640px) {
  /* 时间线与监视器全部收起 */
  .tl-monitor,
  .tl-ruler,
  .tl-timecode,
  .tl-playhead { display: none; }

  .backstage-scroller { padding-top: 30px; }

  /* 铁丝：跨条目缝隙首尾相接，视觉上是一根连续的绳 */
  .backstage-item::before {
    content: "";
    position: absolute;
    top: -10px;
    left: -9px;
    right: -9px;
    height: 2px;
    background: linear-gradient(90deg, rgba(180, 170, 130, 0) 0, rgba(180, 170, 130, 0.55) 10%, rgba(180, 170, 130, 0.55) 90%, rgba(180, 170, 130, 0) 100%);
    z-index: 1;
  }

  /* 木夹子 */
  .backstage-item::after {
    content: "";
    position: absolute;
    top: -20px;
    left: 50%;
    width: 9px;
    height: 24px;
    transform: translateX(-50%);
    z-index: 2;
    border-radius: 3px 3px 2px 2px;
    background: linear-gradient(180deg, #cbbd93, #8a7a52);
    box-shadow: inset 0 -3px 5px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.4);
  }

  /* 相纸：白边 + 微倾，底边留白像手签的位置 */
  .backstage-item {
    padding: 8px 8px 20px;
    background: linear-gradient(175deg, #efe9da, #ddd5c2);
    box-shadow: 0 10px 26px rgba(0, 0, 0, 0.5);
    transform: rotate(var(--tilt, 0deg));
    transform-origin: 50% -22px;
  }

  .backstage-item:nth-child(3n+1) { --tilt: -1.8deg; }
  .backstage-item:nth-child(3n+2) { --tilt: 1.4deg; }
  .backstage-item:nth-child(3n)   { --tilt: -0.7deg; }

  .backstage-item img {
    display: block;
    height: clamp(150px, 24vh, 240px);
    width: auto;
    /* 图片加载完成前按 3:2 预留位置，避免布局抖动 */
    aspect-ratio: auto 3 / 2;
    object-fit: cover;
    /* 显影：--dev 由 JS 按与屏幕中央的距离驱动，越靠中间越亮 */
    filter: brightness(calc(0.3 + 0.72 * var(--dev, 0)))
            saturate(calc(0.32 + 0.63 * var(--dev, 0)))
            contrast(calc(0.92 + 0.12 * var(--dev, 0)));
    user-select: none;
    -webkit-user-drag: none;
  }
}

/* 晾片绳轻晃（仅无减少动态偏好时；transform-origin 在夹子上方，像真的挂着重力摆） */

@media (max-width: 640px) and (prefers-reduced-motion: no-preference) {
  .backstage-item { animation: pin-sway 5.6s ease-in-out infinite alternate; }
  .backstage-item:nth-child(2n) { animation-duration: 6.8s; animation-delay: -2.9s; }
  .backstage-item:nth-child(3n) { animation-delay: -1.7s; }
}

@keyframes pin-sway {
  from { transform: rotate(calc(var(--tilt, 0deg) - 0.9deg)); }
  to   { transform: rotate(calc(var(--tilt, 0deg) + 0.9deg)); }
}

/* ---------- 作品集（原「档案」）：真实封面陈列 ---------- */

.archive {
  position: relative;
  overflow: hidden;
  padding: 12vw 5.2vw;
  background:
    radial-gradient(ellipse 60% 24% at 50% 0%, rgba(233, 225, 207, 0.028) 0%, transparent 70%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-green) 55%, #0a100c 100%);
}

/* 胶片齿孔：段首一条克制的片边 */

.archive::before {
  content: "";
  position: absolute;
  top: 0;
  left: 5.2vw;
  right: 5.2vw;
  height: 12px;
  background-image: repeating-linear-gradient(
    90deg,
    rgba(233, 225, 207, 0.16) 0 10px,
    transparent 10px 30px
  );
  -webkit-mask-image: linear-gradient(180deg, #000 0 5px, transparent 5px);
          mask-image: linear-gradient(180deg, #000 0 5px, transparent 5px);
  opacity: 0.5;
}

.archive-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}

/* 区首标签：中文小标 + 英文 mono 副标 + 顶部细线，组成克制的栏目题花 */

.archive-head > span {
  min-width: 148px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.42em;
  color: var(--paper-dim);
}

.archive-head > span em {
  display: block;
  margin-top: 10px;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 9px;
  letter-spacing: 0.22em;
  color: var(--paper-faint);
}

/* 作品集大标题用衬线：「荔影 未命名放映厅」是本区的正式题名，
   宋体的端正对应片单陈列的档案感，与花絮的手写体形成对照 */

.archive h2 {
  margin: 0;
  text-align: right;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(34px, 5vw, 78px);
  line-height: 1.5;
  letter-spacing: 0.12em;
  color: var(--paper);
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.55);
}

.archive h2 i,
.backstage h2 i {
  font-style: normal;
  display: inline-block;   /* 两个短句各自成组，窄屏只在组间空白处折行 */
}

/* 作品片单：真实封面陈列，随滚动被余光逐一点亮 */

.filmography {
  display: flex;
  flex-direction: column;
  gap: 5.5vw;
  margin-top: 9vw;
}

.film {
  position: relative;
  margin: 0;
  width: 100%;
}

/* 编辑式错落：偶数条目收窄靠右，像档案架上错落的盘盒 */

.film:nth-child(even) {
  width: 86%;
  align-self: flex-end;
}

/* 封面画框：承载悬停上浮 / 3D 倾斜 / 光影扫过，与 .reveal 的入场位移隔离 */

.film-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(233, 225, 207, 0.1);
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.55);
  transform: perspective(1400px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg)) translateY(var(--lift, 0px));
  transition: transform 0.55s var(--ease-out), box-shadow 0.55s ease, border-color 0.55s ease;
  will-change: transform;
}

.film:hover .film-frame {
  --lift: -8px;
  border-color: rgba(233, 225, 207, 0.2);
  box-shadow: 0 44px 96px rgba(0, 0, 0, 0.72);
}

/* 光影扫过：悬停时一道柔光从封面掠过，像放映机光束扫过胶片 */

.film-frame::after {
  content: "";
  position: absolute;
  inset: -25% -70%;
  background: linear-gradient(105deg, transparent 43%, rgba(233, 225, 207, 0.13) 50%, transparent 57%);
  transform: translateX(-72%);
  transition: transform 1.15s var(--ease-out);
  mix-blend-mode: screen;
  pointer-events: none;
}

.film:hover .film-frame::after {
  transform: translateX(72%);
}

.film img {
  display: block;
  width: 100%;
  height: auto;
  /* 三层亮度叙事：基础压暗 0.5 → 进入视野（--vis）亮一层 → 余光扫过（--lit，JS 驱动）再亮一层 */
  filter: brightness(calc(min(1.08, 0.5 + 0.28 * var(--vis, 0) + 0.5 * var(--lit, 0))))
          saturate(calc(min(1, 0.72 + 0.16 * var(--vis, 0) + 0.28 * var(--lit, 0))));
  transform: scale(1.001);
  transition: filter 1s ease, transform 1.4s var(--ease-out);
}

/* 进入视野时被余光点亮一层，悬停时全亮 */

.film.is-visible { --vis: 1; }

.film:hover img {
  filter: brightness(1) saturate(1);
  transform: scale(1.015);
}

/* 可播放作品：script.js 会把封面包进 <a class="film-link">（→ /play 播放页）。
   悬停浮现「播放全片」提示；触屏设备没有悬停，提示常驻弱化显示。 */

.film-link {
  display: block;
  cursor: pointer;
}

.film-link::before {
  content: "▶ 播放全片";
  position: absolute;
  right: 14px;
  bottom: 12px;
  z-index: 2;
  margin: 0;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--paper);
  background: rgba(4, 5, 4, 0.55);
  border: 1px solid rgba(168, 134, 80, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  opacity: 0;
  transform: translateY(6px);
  transition: opacity 0.45s ease, transform 0.45s var(--ease-out);
  pointer-events: none;
}

.film:hover .film-link::before,
.film-link:focus-visible::before {
  opacity: 1;
  transform: none;
}

@media (hover: none) {
  .film-link::before { opacity: 0.92; transform: none; }
}

/* ---------- 招新群二维码：片尾彩蛋区 ---------- */

.join {
  padding: 16vh 5.2vw 12vh;
  text-align: center;
}

.join-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.join-eyebrow {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.34em;
  color: var(--gold);
}

.join-title {
  margin: 0;
  font-size: clamp(30px, 5vw, 52px);
  font-weight: 900;
  letter-spacing: 0.1em;
}

/* 二维码卡片：一束柔光托底，像银幕前的取票口 */

.join-qr {
  position: relative;
  margin: 10px 0 0;
  padding: 14px;
  border: 1px solid rgba(233, 225, 207, 0.14);
  background: rgba(4, 5, 4, 0.6);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6), 0 0 110px rgba(168, 134, 80, 0.1);
}

.join-qr img {
  display: block;
  width: min(320px, 72vw);
  height: auto;
}

.join-note {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: rgba(233, 225, 207, 0.45);
}

/* ---------- 页脚：片尾字幕 ---------- */

footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 26px;
  padding: 72px 5.2vw 64px;
  background: var(--ink);
  border-top: 1px solid var(--line-soft);
  text-align: center;
}

footer .brand { width: 148px; opacity: 0.9; }

footer::before {
  content: "";
  width: 1px;
  height: 44px;
  background: linear-gradient(rgba(233, 225, 207, 0.35), transparent);
}

.footer-apply {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--paper-dim);
  border-bottom: 1px solid rgba(168, 134, 80, 0.5);
  padding-bottom: 5px;
  transition: color 0.35s ease, border-color 0.35s ease;
}

.footer-apply:hover {
  color: var(--paper);
  border-color: var(--gold);
}

/* ---------- 滚动渐显 ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1.1s var(--ease-out), transform 1.1s var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 片单条目依次亮起，像放映员逐盒抽出 */

.filmography .reveal:nth-child(2) { transition-delay: 0.08s; }
.filmography .reveal:nth-child(3) { transition-delay: 0.16s; }

/* ---------- 平板 ---------- */

@media (max-width: 900px) {
  .gallery-title { font-size: clamp(60px, 12vw, 110px); }
  .art-small { margin-top: 10vw; }
  .art-large { grid-column: 1 / 11; }
  .quiet-link { grid-column: 8 / 13; }
}

/* ---------- 手机：保留电影感，降低复杂动画 ---------- */

@media (max-width: 640px) {
  body::before {
    background: radial-gradient(ellipse 130% 95% at 50% 42%, transparent 62%, rgba(0, 0, 0, 0.38) 100%);
  }

  body::after { opacity: 0.04; }

  .site-header {
    height: 62px;
    padding: 0 18px;
    display: flex;
    justify-content: space-between;
  }

  .site-header nav { display: none; }

  .brand { width: 104px; }

  .entry {
    font-size: 10px;
    padding: 8px 11px;
  }

  .opening { min-height: 540px; }

  .carousel-landscape { display: none; }
  .carousel-portrait { display: block; }
  .carousel-portrait .panel img { object-position: center; }

  .hero-logo { width: 82vw; }

  .identity { padding: 96px 24px; }

  /* 移动端延伸层更弱、模糊更小，降低大面积模糊的开销 */

  .beam-photo { top: 56px; height: calc(100% - 56px); }

  /* 移动端雾光更暗、暗雾减为一团，降低模糊开销 */

  .flow {
    top: 56px;
    height: calc(100% - 56px);
    width: 96vw;
  }

  .flow-light { opacity: calc(0.55 * var(--beam-dim)); }

  .flow-dark { opacity: calc(0.6 * var(--beam-dim)); }

  .flow i { filter: blur(13px); }

  .flow-dark i:nth-child(2) { display: none; }

  /* 移动端光尘更少更暗，降低绘制开销 */

  .dust {
    width: 82vw;
    opacity: calc(0.4 * var(--beam-dim));
    background-image:
      radial-gradient(circle 1.5px at 26% 22%, rgba(233, 225, 207, 0.45) 40%, transparent 70%),
      radial-gradient(circle 1.2px at 66% 44%, rgba(233, 225, 207, 0.38) 40%, transparent 70%),
      radial-gradient(circle 1.4px at 44% 68%, rgba(233, 225, 207, 0.32) 40%, transparent 70%);
  }

  .light-tail-gallery { opacity: calc(0.26 * var(--beam-dim)); filter: blur(18px) brightness(0.9); }
  .light-tail-archive { opacity: calc(0.18 * var(--beam-dim)); filter: blur(22px) brightness(0.85); }

  .light-haze {
    width: 170vw;
    filter: blur(24px);
  }

  .light-pool { filter: blur(18px); }

  .identity::before { inset: 56px 14px; }

  .identity-logo { width: 76vw; }

  .identity p {
    font-size: 14px;
    line-height: 2.2;
    letter-spacing: 0.28em;
  }

  .gallery {
    display: flex;
    flex-direction: column;
    padding: 88px 22px 72px;
  }

  .gallery-title {
    font-size: clamp(52px, 17vw, 88px);
    margin-bottom: 56px;
  }

  .art-small {
    width: 62%;
    align-self: flex-end;
    margin-top: 0;
  }

  .art-large {
    width: 92%;
    margin-top: 64px;
    padding: 7px;
    box-shadow:
      0 0 0 1px rgba(233, 225, 207, 0.09),
      0 22px 54px rgba(0, 0, 0, 0.72);
  }

  .quiet-link {
    align-self: flex-end;
    margin: 56px 0 0;
  }

  .backstage { padding: 72px 0; }

  .backstage-head { padding: 0 22px; margin-bottom: 34px; }

  .backstage h2 { font-size: clamp(24px, 7.6vw, 42px); }

  /* 顶部 30px 留给铁丝与夹子（见上方手机端暗房形态） */
  .backstage-scroller { gap: 8px; padding: 30px 22px 6px; }

  .archive { padding: 88px 22px; }

  .archive::before { left: 22px; right: 22px; }

  .archive h2 { font-size: clamp(28px, 8.4vw, 46px); }

  .filmography {
    gap: 22px;
    margin-top: 56px;
  }

  .film:nth-child(even) { width: 100%; }

  footer { padding: 56px 22px 48px; }
}

/* ---------- 减少动态偏好 ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }

  .panel,
  .panel img,
  .hero-logo,
  .art img,
  .art figcaption,
  .art-frame,
  .film img,
  .film-frame,
  .dust,
  .flow i,
  .reveal {
    transition: none;
    animation: none;
  }

  body::after { animation: none; }

  .panel { opacity: 0; }
  .panel.is-active { opacity: 1; }
  .panel img { transform: none; }

  .film-frame { transform: none; }

  .art-frame { transform: none; }

  .art figcaption { opacity: 0.85; transform: none; }

  .reveal {
    opacity: 1;
    transform: none;
  }
}