/* Compact navigation and touch guidance. Desktop presentation stays unchanged. */
.wechat-copy{display:flex;flex-direction:column;align-items:center;gap:8px;width:100%;margin-top:18px;padding:12px;background:#87bdce14;border:1px solid #93c6d72e;border-radius:12px;color:#e5f3f7;min-height:48px}
.wechat-copy span{user-select:all;font-size:15px}.wechat-copy b{font-size:12px;font-weight:400;color:#abd1e1}
.wechat-copy-status{min-height:1.5em;margin:8px 0 0!important;font-size:11px!important}
.progress-dialog .dialog-close{width:44px;height:44px;right:8px;top:8px}
@media(max-width:900px){
  html{scroll-padding-top:0}.section{scroll-margin-top:70px}
  .site-header{padding:calc(6px + env(safe-area-inset-top)) max(16px,env(safe-area-inset-right)) 6px max(16px,env(safe-area-inset-left));min-height:56px;gap:12px;transition:transform .28s cubic-bezier(.22,1,.36,1),background .2s}
  .site-header .home-link{display:flex;align-items:center;min-height:44px;min-width:80px;padding:4px 0}
  .site-header .header-logo{width:76px!important;height:36px!important;margin:0!important}
  .site-header .home-logo-hint,.site-header .menu-hint{display:none!important}
  .site-header #menu-toggle{min-width:64px;min-height:44px;justify-content:center;align-items:center;font-size:15px;padding:8px 12px;gap:0}
  #menu-toggle>span{display:none}
  body.header-tucked:not(.menu-open) .site-header:not(:focus-within){transform:translateY(-105%);pointer-events:none}
  .menu-open .site-header{background:color-mix(in srgb,var(--paper) 85%,transparent);backdrop-filter:blur(20px)}
  #index-menu{padding-top:calc(80px + env(safe-area-inset-top));padding-bottom:calc(20px + env(safe-area-inset-bottom));overscroll-behavior:contain}
  #chapter-nav{flex:0 0 auto;gap:4px}
  #chapter-nav a{width:100%;min-height:48px;font-size:clamp(24px,5.8vw,38px);padding:8px 0}
  #menu-preview{min-height:110px;height:17svh;margin-top:12px}
  .menu-footer button,.menu-footer a{min-height:44px;display:flex;align-items:center}.menu-footer a{justify-content:flex-end}
  .course-embed{scroll-margin-top:70px}
  .work-controls{top:calc(60px + env(safe-area-inset-top));transition:top .28s cubic-bezier(.22,1,.36,1)}
  .header-tucked .work-controls{top:6px}
  .closing-scene{top:62px}.contact-sheet{scroll-margin-top:72px}
  .progress-dialog{max-height:calc(100dvh - 24px);padding:32px 22px 18px}
  .progress-dialog h2{font-size:32px}.progress-dialog .qr{margin:18px auto 14px;width:min(200px,60vw)}
  .reading-nav{font-size:12px;padding-top:2px;padding-bottom:calc(2px + env(safe-area-inset-bottom))}
  .reading-nav button,.reading-nav a{min-height:44px}
  .home-utility button,.arrows button{min-width:44px;min-height:44px}
  .chapter-footer{gap:12px 20px}.chapter-footer a,.chapter-footer button{min-height:44px;display:inline-flex;align-items:center}
  .work-touch-hint{font-size:12px;line-height:1.7}
  button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}
}
@media(hover:none){
  #chapter-nav a:is(:hover,:focus-visible){transform:none}
  #chapter-nav:has(a:hover) a:not(:hover),#chapter-nav:has(a:focus-visible) a:not(:focus-visible){opacity:1}
  #chapter-nav a:active{transform:scale(.98);color:#8fc1fb}
  .site-header a:hover,#menu-toggle:hover{opacity:1}
  .portrait-only.work-touch-hint{display:block}
}
@media(max-width:600px){
  .chapter-head{padding-top:110px;min-height:52svh}
  body[data-route=waicy] .chapter-head{padding-top:110px}
  body[data-route=together] .chapter-head{min-height:62svh;padding-top:110px}
  .chapter-intro{font-size:24px}
  .contact-links{flex-wrap:wrap}.contact-links a{min-height:44px;display:flex;align-items:center}
}
@media(max-width:900px) and (max-height:500px){
  .site-header{min-height:52px;padding-block:4px}.site-header .header-logo{height:32px!important;width:68px!important}
  #index-menu{padding-top:64px;display:grid;grid-template-columns:1fr;gap:12px}#chapter-nav{display:grid;grid-template-columns:1fr 1fr;gap:4px 30px;padding:0}#chapter-nav a{font-size:23px;min-height:48px}#menu-preview{display:none}.menu-footer{grid-row:auto}
  .reading-nav{display:none!important}.chapter-head{min-height:unset;padding-top:100px}.course-embed{scroll-margin-top:58px}
}
@media(prefers-reduced-motion:reduce){.site-header,.work-controls{transition:none}}

.mobile-home{display:none}
/* The arrows always remain above the scene and respond on touch-down. */
#home .home-footer{z-index:20}#home .home-footer .arrows{position:relative;isolation:isolate}#home .home-footer .arrows button{position:relative;touch-action:manipulation}#home .home-footer .arrows button:active{transform:scale(.91);background:#ffffff26}
@media(max-width:900px){
  #home .hero-stage,#home .home-scene-copy,#home .home-logo-intro{display:none}
  #home .mobile-home{display:flex;position:absolute;inset:calc(80px + env(safe-area-inset-top)) 0 calc(146px + env(safe-area-inset-bottom));flex-direction:column;justify-content:center;gap:clamp(24px,5svh,50px);z-index:5}
  .mobile-home-intro{padding-inline:24px;text-align:center}.mobile-home-intro small{font-size:10px;letter-spacing:.2em;color:#9ba6ac}.mobile-home-intro p{margin:14px 0 0;font-size:clamp(24px,6.8vw,34px);line-height:1.45;letter-spacing:-.03em}
  .mobile-home-gallery{width:100%;position:relative;touch-action:pan-y pinch-zoom;user-select:none;aspect-ratio:100/54;flex-shrink:0}
  .mobile-home-track{position:absolute;inset:0;isolation:isolate}
  .mobile-home-card{position:absolute;left:50%;top:50%;display:block;will-change:transform;width:100%;padding:0;border:0;border-radius:14px;overflow:hidden;background:#171e25;aspect-ratio:16/10;color:white;box-shadow:0 18px 36px #0005;transform-origin:center;touch-action:pan-y pinch-zoom}
  .mobile-home-card[hidden]{display:none}.mobile-home-card:focus-visible{outline:2px solid #a3d5ff;outline-offset:4px}.mobile-home-card img{display:block;width:100%;height:100%;object-fit:cover;pointer-events:none;-webkit-user-drag:none}
  .mobile-home-play{position:absolute;right:14px;bottom:14px;padding:10px 16px;min-height:40px;background:#10171bc9;backdrop-filter:blur(14px);border:1px solid #ffffff40;border-radius:999px;font-size:13px;pointer-events:none;opacity:var(--cover-detail,1)}
  .mobile-home-credit{position:absolute;top:12px;left:12px;font-size:10px;text-shadow:0 1px 5px #000;pointer-events:none}
  .mobile-home-caption{padding:0 30px;min-height:80px;text-align:center}.mobile-home-caption h2{font-size:18px;line-height:1.55;font-weight:500;text-wrap:balance;margin:0}.mobile-home-caption p{font-size:12px;margin:12px 0 0;color:#9ca8b0}
  #home .home-footer{bottom:calc(72px + env(safe-area-inset-bottom));left:24px;right:24px;visibility:visible;opacity:1}
  #home .home-footer .arrows{grid-row:1;min-height:56px}#home .home-footer .arrows button{min-width:48px;min-height:48px}
  #home #slide-number{font-size:13px;opacity:.8}
  #home .home-utility{left:24px;right:24px;bottom:calc(13px + env(safe-area-inset-bottom));display:flex!important;border-top:1px solid #ffffff1a;visibility:visible;opacity:1}
  #home #home-all-cases{min-height:44px;font-size:13px;opacity:.85;width:100%;text-align:left}#home #home-all-cases::after{content:'探索全部作品';float:right;color:#8c9aa4;font-size:12px}
  #home #home-autoplay,#home #home-replay{display:none}
  .about-story{gap:36px}.about-story-block h2{font-size:21px;line-height:1.4;margin-bottom:20px;gap:14px;font-weight:500}.about-story-block h2>span{font-size:12px}
  .about-story-block p{font-size:17px;line-height:1.85;color:color-mix(in srgb,var(--ink) 86%,var(--paper))}
  .about-story-block .story-chunk{display:block;margin-top:16px}.about-story-block .story-chunk:first-child{margin-top:0}
  .about-story-block strong{font-weight:550}.about-story-block .story-brand{float:none;display:inline-block;width:5em;height:.84em;max-width:none;margin:0 .45em 0 0;vertical-align:baseline}
  .about-story-block:nth-child(3) .story-chunk:not(:first-child){padding-left:15px;border-left:2px solid #78aaff50}
  body[data-route=about] .chapter-head{min-height:0;padding-bottom:38px}body[data-route=about] .chapter-head h1{font-size:clamp(48px,13vw,82px);line-height:1.15}body[data-route=about] .chapter-intro{font-size:23px;max-width:18em}body[data-route=about] .chapter-eyebrow{margin-bottom:25px}
  body[data-route=about] .section{padding-inline:24px}.about-story-section{padding-top:15px!important}
}
@media(max-width:900px) and (max-height:640px) and (orientation:portrait){#home .mobile-home{inset:76px 0 136px;gap:14px}.mobile-home-intro p{font-size:23px;margin-top:8px}.mobile-home-gallery{width:88%;margin:auto}.mobile-home-caption{min-height:58px}.mobile-home-caption h2{font-size:16px}.mobile-home-caption p{margin-top:7px}}
@media(max-width:900px) and (max-height:500px) and (orientation:landscape){
  #home .mobile-home{inset:66px 24px 68px;display:grid;grid-template-columns:36% minmax(0,1fr);grid-template-rows:1fr auto;gap:8px 22px;align-items:center}
  .mobile-home-intro{grid-row:1/3;padding:0;text-align:left}.mobile-home-intro p{font-size:24px}.mobile-home-gallery{width:100%;height:100%;min-height:0;aspect-ratio:auto;overflow:hidden}.mobile-home-card{aspect-ratio:16/8.2;border-radius:10px}.mobile-home-play{bottom:8px;right:8px;padding:7px 12px;min-height:32px}
  .mobile-home-caption{grid-column:2;min-height:0;padding:0;text-align:left;display:flex;gap:12px;align-items:center}.mobile-home-caption h2{font-size:14px}.mobile-home-caption p{font-size:10px;margin:0;white-space:nowrap}
  #home .home-footer{bottom:calc(8px + env(safe-area-inset-bottom));left:24px;right:24px}#home .home-utility{display:none!important}#home .home-footer .arrows{min-height:48px;padding:0}#home .home-footer .arrows button{min-height:44px;height:44px;width:44px;min-width:44px}
}

/* Phone portrait keeps the suspended orbit, with one readable cover in front. */
@media(max-width:900px) and (orientation:portrait){
  #home .mobile-home.is-orbit{gap:12px;justify-content:space-between;touch-action:pinch-zoom}
  .is-orbit .mobile-home-intro{flex-shrink:0}.is-orbit .mobile-home-intro p{font-size:clamp(23px,6.4vw,32px);margin-top:10px}
  .is-orbit .mobile-home-gallery{flex:1;min-height:0;max-height:480px;width:100%;margin:0;aspect-ratio:auto;touch-action:pinch-zoom;overflow:hidden}
  .is-orbit .mobile-home-card{border-radius:10px;touch-action:pinch-zoom;box-shadow:0 12px 28px #0006}
  .is-orbit .mobile-home-play{font-size:12px;min-height:32px;right:10px;bottom:10px;padding:7px 12px}
  .is-orbit .mobile-home-credit{opacity:var(--cover-detail,1)}
  .is-orbit .mobile-home-caption{min-height:76px;flex-shrink:0;padding-inline:24px}
  .is-orbit .mobile-home-caption p{font-size:11px;margin-top:8px;letter-spacing:.02em}
}
@media(max-width:900px) and (max-height:640px) and (orientation:portrait){
  #home .mobile-home.is-orbit{gap:5px}.is-orbit .mobile-home-intro small{display:none}.is-orbit .mobile-home-intro p{font-size:21px;margin:0}
  .is-orbit .mobile-home-caption{min-height:61px}.is-orbit .mobile-home-caption h2{font-size:15px}.is-orbit .mobile-home-caption p{font-size:10px;margin-top:5px}
}