/* The Gramophone: one world, sampled from the footage. Tokens finalize after the video gate. */
:root{
  --canvas:#1c1410;
  --panel:#2a1f19;
  --panel-2:#33261e;
  --accent:#d8973a;
  --accent-hover:#e9ad55;
  --accent-muted:rgba(216,151,58,.18);
  --line:rgba(216,151,58,.28);
  --line-strong:rgba(216,151,58,.55);
  --text-secondary:#b8a48b;
  --text-primary:#f2e7d4;
  --tshadow:0 1px 2px rgba(5,5,10,.95),0 3px 12px rgba(5,5,10,.78),0 10px 44px rgba(5,5,10,.8);
  --ease-out:cubic-bezier(.22,.61,.36,1);
  --ease-soft:cubic-bezier(.4,0,.2,1);
  --display:"Fraunces",Georgia,serif;
  --body:"Lora",Georgia,serif;
  --mono:"Courier Prime","Courier New",monospace;
}
*{box-sizing:border-box}
html{overflow-x:hidden;overflow-x:clip;scroll-behavior:smooth}
body{margin:0;background:var(--canvas);color:var(--text-primary);font-family:var(--body);font-size:17px;line-height:1.65;overflow-x:hidden;overflow-x:clip;-webkit-font-smoothing:antialiased;animation:pagein 1.2s var(--ease-out) both}
@keyframes pagein{from{opacity:0}to{opacity:1}}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{font-family:var(--display);font-weight:600;line-height:1.08;margin:0;letter-spacing:-.01em}
p{margin:0}
.skip{position:absolute;left:-999px;top:8px;background:var(--accent);color:#1c1410;padding:8px 14px;border-radius:6px;z-index:100;font-family:var(--mono)}
.skip:focus{left:12px}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.kicker{font-family:var(--mono);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.btn{font-family:var(--mono);font-size:15px;letter-spacing:.06em;text-transform:uppercase;text-decoration:none;display:inline-block;padding:14px 26px;border-radius:999px;background:var(--accent);color:#1c1410;border:1px solid var(--accent);transition:background .35s var(--ease-soft),transform .35s var(--ease-soft),box-shadow .35s var(--ease-soft);cursor:pointer}
.btn:hover{background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 10px 30px var(--accent-muted)}
.btn.ghost{background:transparent;color:var(--text-primary);border-color:var(--line-strong)}
.btn.ghost:hover{background:var(--accent-muted)}
@media (pointer:coarse){.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center}}

/* ---------- environment layer: one fixed record disc, whisper level ---------- */
.env{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.env .disc{position:absolute;width:140vmax;height:140vmax;right:-70vmax;top:-40vmax;opacity:.07;animation:spin 120s linear infinite -30s}
.env .glow{position:absolute;inset:0;background:radial-gradient(ellipse 60% 50% at 70% 30%,rgba(216,151,58,.10),transparent 70%);animation:breathe 14s var(--ease-soft) infinite -4s}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes breathe{0%,100%{opacity:.7}50%{opacity:1}}
.grain{position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.05;background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='160' height='160' filter='url(%23n)' opacity='.9'/></svg>")}

/* ---------- nav ---------- */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;display:flex;align-items:center;justify-content:space-between;padding:18px 28px;text-shadow:0 1px 2px rgba(5,5,10,.9),0 4px 18px rgba(5,5,10,.7)}
/* 首屏第一帧顶部是机头的铬面高光，导航文字必须自带底衬才读得出来 */
.nav::before{content:"";position:absolute;inset:-12px 0 -84px 0;pointer-events:none;z-index:-1;background:linear-gradient(180deg,rgba(12,8,6,.86),rgba(12,8,6,.80) 46%,rgba(12,8,6,.44) 72%,rgba(12,8,6,0))}
.nav a.btn{text-shadow:none}
.nav .brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-family:var(--display);font-weight:600;font-size:20px}
.nav .brand svg{width:26px;height:26px}
.nav ul{list-style:none;display:flex;gap:26px;margin:0;padding:0;align-items:center}
.nav li a{text-decoration:none;font-family:var(--mono);font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--text-secondary);transition:color .3s}
.nav li a:hover{color:var(--text-primary)}
.nav li a.btn{color:#1c1410;padding:10px 18px;font-size:13px;white-space:nowrap}
@media (max-width:720px){.nav ul li:not(:last-child){display:none}.nav{padding:14px 18px}.nav .brand{font-size:17px}.nav .brand svg{width:22px;height:22px}}

/* ---------- hero ---------- */
.hero{position:relative;height:600vh;z-index:2}
/* svh = 地址栏露出时的视口高度：iOS 上 100vh 比可见区高，居中的文案会被压到可见区中线以下 */
.stage{position:sticky;top:0;height:100vh;height:100svh;overflow:hidden;background:var(--canvas)}
.stage .poster{position:absolute;inset:0;background-size:cover;background-position:50% 50%}
.stage video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:50% 50%;opacity:0;transition:opacity .9s var(--ease-soft);will-change:transform;transform:translateZ(0)}
.stage.video-ready video{opacity:1}
.stage.video-failed video{display:none}
.scrim{position:absolute;inset:0;pointer-events:none;background:radial-gradient(ellipse 120% 90% at 50% 45%,rgba(10,10,18,0) 35%,rgba(10,10,18,.62) 100%)}
/* 收尾段文案压在杯子上，所以整帧一起退后（不是只把字底下那块调深）：不透明度吃收尾段的组装进度，滚上去可逆 */
.dim{position:absolute;inset:0;pointer-events:none;background:rgba(8,6,10,.80);opacity:var(--dim,0)}
.ring{position:absolute;right:28px;bottom:28px;width:36px;height:36px;color:var(--accent);opacity:.9;transform:rotate(-90deg);transition:opacity .6s}
.stage.video-ready .ring{opacity:0}
.cue{position:absolute;right:28px;bottom:28px;color:var(--accent);font-family:var(--mono);font-size:12px;letter-spacing:.14em;text-transform:uppercase;display:flex;gap:10px;align-items:center;opacity:.9}
.cue svg{width:16px;height:16px;animation:nudge 2.6s var(--ease-soft) infinite}
@keyframes nudge{0%,100%{transform:translateY(0)}50%{transform:translateY(5px)}}
.motes{position:absolute;inset:0;pointer-events:none}
.motes i{position:absolute;width:3px;height:3px;border-radius:50%;background:var(--accent);opacity:.35;animation:mote 9s var(--ease-soft) infinite}
@keyframes mote{0%,100%{transform:translate(0,0);opacity:.15}50%{transform:translate(8px,-18px);opacity:.45}}

/* caption bands: four layers of legibility, opacity and --k driven by JS */
/* 两栏由实测定：左栏 5-34%、右栏 60-95% 是画面里全程够暗的两条；中线留给主体（法条 7）。
   第 3、4 段白杯升起后画面下半变亮，故这两段落在上部 6-36%。数字来自 review/audit 最差帧审计。 */
/* isolation 让每条文案带永远自成一层：遮罩用 z-index:-1 压在文字底下，而 opacity 到 1 时
   文案带不再自成一层、遮罩会掉到视频下面去（第 1 段整段没遮罩就是这么来的，实测 1.04）。 */
.band{isolation:isolate;position:absolute;left:5vw;top:50%;transform:translateY(-50%);width:min(29vw,420px);opacity:0;text-shadow:var(--tshadow);--k:0}
.band.right{left:auto;right:5vw}
.band.high{top:10%;transform:none}
/* 收尾段整页居中，压在主体上（aken 2026-09-04 定，法条 7 的收尾例外）；整台压暗保证主体不抢镜 */
.band.centered{left:50%;top:50%;transform:translate(-50%,-50%);width:min(70vw,760px);text-align:center}
.band.centered .name,.band.centered .sub{max-width:none}
.band.centered .cta{justify-content:center}
/* 椭圆用 closest-side 正好收在盒子边上：半径写成百分比会超出盒子、渐变被裁出一道矩形硬边 */
.band::before{content:"";position:absolute;inset:-46% -34%;pointer-events:none;opacity:calc(.25 + .75*var(--k,1));background:radial-gradient(ellipse closest-side at 50% 50%,rgba(5,5,10,.72) 0%,rgba(5,5,10,.56) 60%,rgba(5,5,10,0) 100%);z-index:-1}
/* 白杯升入后左栏被照亮，这一段自己要更深的遮罩（实测 3.24 → 9.55） */
.band[data-a="0.52"]::before{inset:-56% -40%;background:radial-gradient(ellipse closest-side at 50% 50%,rgba(5,5,10,.94) 0%,rgba(5,5,10,.86) 68%,rgba(5,5,10,0) 100%)}
.band.centered::before{inset:-60% -40%;background:radial-gradient(ellipse closest-side at 50% 50%,rgba(5,5,10,.94) 0%,rgba(5,5,10,.86) 68%,rgba(5,5,10,0) 100%)}
.band .btn{text-shadow:none}
.band .line{font-family:var(--display);font-weight:300;font-style:italic;font-size:clamp(28px,3.1vw,46px);line-height:1.14;max-width:14ch}
.band .sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.band .w{display:inline-block;white-space:nowrap}
.band .c{display:inline-block}
.band .sp{display:inline-block;width:.28em}
.band .kick{font-family:var(--mono);font-size:13px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);margin-bottom:18px;opacity:var(--k)}

/* (f) drift-down: band 1 */
.band[data-fx="drift"] .w{--kc:clamp(0,(var(--k,0) - var(--th,0))*2.8,1);opacity:var(--kc);transform:translateY(calc((1 - var(--kc))*-26px))}
/* (c) blur-to-sharp: band 2 */
.band[data-fx="blur"] .stack{position:relative}
.band[data-fx="blur"] .soft{position:absolute;inset:0;filter:blur(10px);opacity:calc(1 - var(--k,0))}
.band[data-fx="blur"] .sharp{opacity:var(--k,0)}
/* (b) grid snap-align: band 3 */
.band[data-fx="grid"] .c{--kc:clamp(0,(var(--k,0) - var(--th,0))*2.6,1);opacity:var(--kc);transform:translateX(calc((1 - var(--kc))*var(--jx,0px)))}
/* (e) word-by-word rise into a staged settle: band 4 */
.band.settle .w{--kc:clamp(0,(var(--k,0) - var(--th,0))*3,1);opacity:var(--kc);transform:translateY(calc((1 - var(--kc))*22px))}
.band.settle .name{font-family:var(--display);font-weight:600;font-style:normal;font-size:clamp(40px,5.4vw,84px);line-height:1.02;max-width:12ch;letter-spacing:-.02em}
.band.settle .sub{font-family:var(--display);font-weight:300;font-style:italic;font-size:clamp(21px,2.3vw,32px);margin-top:14px;--ks:clamp(0,(var(--k,0) - .66)*4,1);opacity:var(--ks);transform:translateY(calc((1 - var(--ks))*14px))}
.band.settle .cta{margin-top:26px;--kb:clamp(0,(var(--k,0) - .78)*5,1);opacity:var(--kb);transform:translateY(calc((1 - var(--kb))*12px));display:flex;gap:14px;align-items:center;flex-wrap:wrap}

/* the static hero (reduced motion only): a designed layout, not an apology */
.static-hero{display:none;position:relative;min-height:100svh;z-index:2;align-items:center;justify-content:center;text-align:center;padding:0 7vw;background:var(--canvas)}
.static-hero .bg{position:absolute;inset:0;background-image:url("hero-ending.jpg");background-size:cover;background-position:50% 50%}
.static-hero .bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(28,20,16,.72),rgba(28,20,16,.78) 50%,rgba(28,20,16,.90))}
.static-hero .copy{position:relative;text-shadow:var(--tshadow);max-width:34ch;display:flex;flex-direction:column;align-items:center}
.static-hero h1{font-size:clamp(46px,12vw,92px);line-height:.98;letter-spacing:-.02em}
.static-hero .sub{font-family:var(--display);font-style:italic;font-weight:300;font-size:clamp(20px,5.4vw,30px);margin:14px 0 26px}
.static-hero .btn{text-shadow:none}
@media (prefers-reduced-motion:reduce){
  .hero{display:none}
  .static-hero{display:flex}
}
/* 窄屏竖切只露画面中间约四分之一：收尾帧的杯子被裁成一片抽象色块，起始帧是竖向构图、裁完仍读得出是在冲咖啡 */
@media (max-width:720px){.static-hero .bg{background-image:url("hero-poster.jpg")}}
@media (max-height:560px){.cue,.ring{display:none}}

/* ---------- sections ---------- */
main{position:relative;z-index:2;background:var(--canvas)}
.sec{position:relative;padding:120px 7vw;max-width:1280px;margin:0 auto}
.sec.tight{padding-top:80px}
.head{display:grid;grid-template-columns:1fr;gap:12px;margin-bottom:56px}
.head h2{font-size:clamp(34px,4.4vw,60px);max-width:18ch}
.head .lede{color:var(--text-secondary);max-width:52ch;font-size:18px}

/* the signature: a steam line that draws itself between sections */
.steam{display:block;width:min(160px,30vw);height:90px;margin:0 auto;overflow:visible}
.steam path{fill:none;stroke:var(--accent);stroke-width:1.6;stroke-linecap:round;stroke-dasharray:var(--len,300);stroke-dashoffset:var(--len,300);opacity:.85}
.steam.drawn path{stroke-dashoffset:0}

/* entrances: container-prefixed, staggered, delays retired after */
.rev .part{opacity:0;transform:translateY(22px);transition:opacity .9s var(--ease-out),transform .9s var(--ease-out)}
.rev.in .part{opacity:1;transform:none}
.rev.in .part:nth-child(2){transition-delay:.12s}
.rev.in .part:nth-child(3){transition-delay:.24s}
.rev.in .part:nth-child(4){transition-delay:.36s}
.rev.in.settled .part:nth-child(n){transition-delay:0s}

/* The Room: three equal cards, no two neighbors alike */
.room{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--panel);border:1px solid rgba(216,151,58,.14);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;transition:transform .5s var(--ease-out),border-color .5s}
.card:hover{transform:translateY(-4px);border-color:var(--line-strong)}
.card .ph{aspect-ratio:4/3;overflow:hidden;background:var(--panel-2)}
.card .ph.missing{display:flex;align-items:center;justify-content:center;background:linear-gradient(140deg,var(--panel-2),var(--panel))}
.card .ph.missing img{display:none}
.card .ph.missing::after{content:attr(data-label);font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--text-secondary);opacity:.65}
.card .ph img{width:100%;height:100%;object-fit:cover;transform:scale(1.02);transition:transform 1.4s var(--ease-out)}
.card:hover .ph img{transform:scale(1.07)}
.card .body{padding:22px 22px 26px;display:flex;flex-direction:column;gap:8px}
.card h3{font-size:24px}
.card p{color:var(--text-secondary);max-width:32ch}
.card .no{font-family:var(--mono);font-size:12px;letter-spacing:.14em;color:var(--accent)}
@media (max-width:900px){.room{grid-template-columns:1fr}}

/* Let it brew: the one interactive moment */
/* 面板四边都要化开：只做竖向渐变时左右会留两道硬边，读起来像一块浮在页面上的方块 */
.brew{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:center;position:relative;border-radius:24px}
.brew::before{content:"";position:absolute;inset:-40px -60px;pointer-events:none;z-index:-1;border-radius:32px;background:radial-gradient(ellipse 62% 58% at 42% 50%,rgba(42,31,25,.72),rgba(42,31,25,.34) 58%,rgba(42,31,25,0) 82%)}
.brew .cupwrap{display:flex;flex-direction:column;align-items:center;gap:18px;user-select:none;-webkit-user-select:none}
.cup{width:min(260px,60vw);touch-action:none;cursor:pointer;border-radius:50%}
.cup .fill{transform-origin:50% 100%;transform:scaleY(var(--p,0));transition:transform .12s linear}
.cup .glow{opacity:var(--p,0)}
.cup .steamline{opacity:var(--p,0)}
.brew .hint{font-family:var(--mono);font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--text-secondary)}
.brew .done{font-family:var(--display);font-style:italic;font-weight:300;font-size:26px;opacity:0;transform:translateY(8px);transition:opacity .8s var(--ease-out),transform .8s var(--ease-out)}
.brew.complete .done{opacity:1;transform:none}
.brew .text h2{font-size:clamp(34px,4.4vw,60px)}
@media (max-width:900px){.brew{grid-template-columns:1fr;gap:34px}}

/* Menu: revealed by the hold */
.menu{margin-top:40px;display:grid;grid-template-columns:1fr 1fr;gap:10px 48px;max-width:900px}
.menu .item{display:flex;align-items:baseline;gap:12px;padding:12px 0;border-bottom:1px solid rgba(216,151,58,.16);opacity:.22;transform:translateX(-6px);transition:opacity .7s var(--ease-out),transform .7s var(--ease-out)}
.menu.lit .item{opacity:1;transform:none}
.menu.lit .item:nth-child(2){transition-delay:.08s}.menu.lit .item:nth-child(3){transition-delay:.16s}.menu.lit .item:nth-child(4){transition-delay:.24s}.menu.lit .item:nth-child(5){transition-delay:.32s}.menu.lit .item:nth-child(6){transition-delay:.4s}
.menu .item .n{font-family:var(--display);font-size:22px;font-weight:600}
.menu .item .dots{flex:1;border-bottom:1px dotted rgba(216,151,58,.4);transform:translateY(-6px)}
.menu .item .pr{font-family:var(--mono);color:var(--accent)}
.menu .note{grid-column:1/-1;font-family:var(--mono);font-size:13px;color:var(--text-secondary);margin-top:14px;letter-spacing:.02em}
@media (max-width:720px){.menu{grid-template-columns:1fr}}

/* Regulars: quotes as a staggered ribbon, not cards */
.quotes{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.q{position:relative;padding:34px 26px 26px;border-left:1px solid var(--line-strong)}
.q:nth-child(2){transform:translateY(34px)}
.q .mark{position:absolute;top:-6px;left:22px;font-family:var(--display);font-size:64px;line-height:1;color:var(--accent);opacity:.7}
.q p{font-family:var(--display);font-weight:300;font-style:italic;font-size:22px;line-height:1.35;max-width:26ch}
.q cite{display:block;margin-top:16px;font-family:var(--mono);font-style:normal;font-size:13px;letter-spacing:.1em;color:var(--text-secondary)}
@media (max-width:900px){.quotes{grid-template-columns:1fr}.q:nth-child(2){transform:none}}

/* Questions */
.faq{max-width:820px}
.faq details{border-top:1px solid rgba(216,151,58,.18);padding:6px 0}
.faq details:last-child{border-bottom:1px solid rgba(216,151,58,.18)}
.faq summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:baseline;gap:20px;padding:18px 0;font-family:var(--display);font-size:24px;font-weight:600}
.faq summary::-webkit-details-marker{display:none}
.faq summary .plus{font-family:var(--mono);color:var(--accent);font-size:20px;transition:transform .4s var(--ease-out)}
.faq details[open] summary .plus{transform:rotate(45deg)}
.faq .a{padding:0 0 20px;color:var(--text-secondary);max-width:58ch}

/* Hours: mono card with the ending frame beside it */
.hours{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:stretch}
.hours .ph{border-radius:16px;overflow:hidden;min-height:320px;background:var(--panel-2)}
.hours .ph img{width:100%;height:100%;object-fit:cover}
.hours .card2{background:var(--panel);border-radius:16px;padding:40px;display:flex;flex-direction:column;justify-content:center;gap:18px;font-family:var(--mono);font-size:16px;line-height:1.8;border:1px solid rgba(216,151,58,.14)}
.hours .card2 .big{font-family:var(--display);font-size:clamp(28px,3.2vw,40px);font-weight:600;line-height:1.1;letter-spacing:-.01em}
@media (max-width:900px){.hours{grid-template-columns:1fr}}

/* Book: the single call to action */
.book{background:radial-gradient(ellipse 70% 80% at 30% 50%,rgba(216,151,58,.12),transparent 70%);border-radius:24px;display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.book form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.book label{display:flex;flex-direction:column;gap:6px;font-family:var(--mono);font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--text-secondary)}
.book input{background:rgba(28,20,16,.7);border:1px solid rgba(216,151,58,.3);color:var(--text-primary);padding:14px;border-radius:8px;font-family:var(--body);font-size:16px;transition:border-color .3s}
.book input:focus{border-color:var(--accent);outline:none}
.book input::placeholder{color:rgba(184,164,139,.6)}
.book .row{grid-column:1/-1;display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-top:6px}
.book .ok{grid-column:1/-1;display:none;font-family:var(--display);font-style:italic;font-weight:300;font-size:28px;line-height:1.3}
.book form.sent .ok{display:block}
.book form.sent label,.book form.sent .row{display:none}
@media (max-width:900px){.book{grid-template-columns:1fr}.book form{grid-template-columns:1fr}}

footer{position:relative;z-index:2;padding:60px 7vw 40px;color:var(--text-secondary);font-size:14px;border-top:1px solid rgba(216,151,58,.14);background:var(--canvas)}
footer .inner{max-width:1280px;margin:0 auto;display:grid;grid-template-columns:1fr auto;gap:30px;align-items:end}
footer p{max-width:70ch}
footer .made{font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;font-size:12px}
@media (max-width:720px){footer .inner{grid-template-columns:1fr}}

/* pause everything on hidden tabs; loops only run in view */
body.paused *,body.paused *::before,body.paused *::after{animation-play-state:paused!important}
.env:not(.live) .disc,.env:not(.live) .glow{animation-play-state:paused}

/* reduced motion: honored completely, final states shown */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;transition-delay:0s!important}
  .rev .part{opacity:1;transform:none}
  .steam path{stroke-dashoffset:0}
  .menu .item{opacity:1;transform:none}
  .brew .done{opacity:1;transform:none}
  .cup .fill{transform:scaleY(1)}
  .cup .glow,.cup .steamline{opacity:1}
  .q:nth-child(2){transform:translateY(34px)}
  @media (max-width:900px){.q:nth-child(2){transform:none}}
}
/* pinned-by-JS final states (live reduced-motion flip) mirror the block above */
body.pinned .rev .part{opacity:1;transform:none;transition:none}
body.pinned .steam path{stroke-dashoffset:0;transition:none}
body.pinned .menu .item{opacity:1;transform:none}
body.pinned .brew .done{opacity:1;transform:none}
body.pinned .cup .fill{transform:scaleY(1)}
body.pinned .cup .glow,body.pinned .cup .steamline{opacity:1}

/* 竖屏／窄屏：左右两栏没了（375px 下侧栏只剩 109px），但 cover 裁的是宽度、上下全露，
   而主体按法条 7 居中，所以负空间从「左右」转成「上下」——左右交替随之变成上下交替。 */
@media (max-width:720px),(orientation:portrait) and (max-width:900px){
  /* 带上 .band.right：外面那条是两层类，一层类的 .band 抢不过它，第 2 段会退成靠右对齐 */
  .band,.band.right{left:5vw;right:5vw;width:auto;text-align:center;top:auto;transform:none}
  .band .line,.band.settle .name,.band.settle .sub{max-width:20ch;margin-left:auto;margin-right:auto}
  .band .cta{justify-content:center}
  .band[data-a="0"],.band[data-a="0.52"]{top:11%}
  .band[data-a="0.26"]{bottom:13%}
  .band.centered{left:5vw;right:5vw;width:auto;top:50%;transform:translateY(-50%)}
  /* 竖屏没有「侧栏负空间」这回事：文案横跨整幅，局部椭圆护不住（实测 1.04），
     改成从画面上/下边缘压下来的整幅横向遮罩，跟导航那条遮罩同一个做法。 */
  .band::before{inset:-15vh -6vw -9vh -6vw;background:linear-gradient(180deg,rgba(5,5,10,.94),rgba(5,5,10,.90) 64%,rgba(5,5,10,.58) 86%,rgba(5,5,10,0))}
  .band[data-a="0.26"]::before{inset:-9vh -6vw -15vh -6vw;background:linear-gradient(0deg,rgba(5,5,10,.94),rgba(5,5,10,.90) 64%,rgba(5,5,10,.58) 86%,rgba(5,5,10,0))}
  .band[data-a="0.52"]::before{inset:-15vh -6vw -9vh -6vw;background:linear-gradient(180deg,rgba(5,5,10,.94),rgba(5,5,10,.90) 64%,rgba(5,5,10,.58) 86%,rgba(5,5,10,0))}
  /* 收尾段压在杯子上，竖屏裁切把白杯放大到满宽，整台要压得比横屏更深 */
  .band.centered::before{inset:-12vh -6vw;opacity:calc(.5 + .5*var(--k,1));background:radial-gradient(ellipse closest-side at 50% 50%,rgba(5,5,10,.78) 0%,rgba(5,5,10,.66) 62%,rgba(5,5,10,.3) 88%,rgba(5,5,10,0) 100%)}
  /* 压到 .72：竖屏裁切把杯子放大到满宽，压太狠杯子会整个消失——aken 要的是「压在杯子上、杯子别抢镜」 */
  .dim{background:rgba(8,6,10,.72)}
  .band .kick{margin-bottom:12px}
  .band.settle .cta{margin-top:20px}
}