/* 米花私人工作台 · 首页（按网站来做的产品介绍）
   和素材库同一套视觉：冷灰白底、纯白卡片、近黑的字、中等粗细的大标题、黑按钮，颜色留给素材图。
   每一屏讲一件事，用一个能看能点的画面讲，文字一两行。画面里的图和数字都来自库里的真实数据。 */
:root {
  color-scheme: light;
  --bg: #F7F8FA;
  --card: #FFFFFF;
  --fill: #F0F1F4;
  --fill-2: #E7E9ED;
  --ink: #131212;
  --ink-2: #5E5E66;
  --ink-3: #9A9CA5;
  --line: #ECEDF0;
  --line-2: #DFE1E6;
  --like: #F0384E;
  --lilac: #E3D9FF;
  --mark: #FFF3CF;
  --font: "MiSans", "PingFang SC", -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --font-mono: "SF Mono", ui-monospace, Menlo, monospace;
  --ease: cubic-bezier(.2, .8, .2, 1);
  --hair: 0 0 0 1px rgba(19, 18, 18, .04);
  --lift: 0 0 0 1px rgba(19, 18, 18, .03), 0 1px 2px rgba(19, 18, 18, .04), 0 10px 24px rgba(19, 18, 18, .06), 0 28px 56px rgba(19, 18, 18, .07);
  --float: 0 2px 6px rgba(19, 18, 18, .06), 0 14px 34px rgba(19, 18, 18, .12);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 96px; overflow-x: clip; }
body { margin: 0; font-family: var(--font); font-size: 16px; line-height: 1.6; color: var(--ink); background: var(--bg); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; border: 0; background: none; padding: 0; }
h1, h2, h3, h4, p { margin: 0; font-weight: 400; }
b, strong { font-weight: 500; }
img { display: block; }
q { quotes: none; }
.i { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; flex: none; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; border-radius: 8px; }
::selection { background: #D9E2FF; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 6px; height: 40px; padding: 0 16px; border-radius: 10px; font-size: 14px; font-weight: 500; white-space: nowrap; transition: background .18s, color .18s, transform .18s var(--ease), box-shadow .25s; }
.btn .i { width: 16px; height: 16px; transition: transform .25s var(--ease); }
.btn.dark { background: var(--ink); color: #fff; }
.btn.dark:hover { background: #2B2A2A; box-shadow: 0 10px 26px rgba(19, 18, 18, .18); }
.btn.dark:hover .i { transform: translateX(3px); }
.btn.plain { color: var(--ink-2); }
.btn.plain:hover { color: var(--ink); background: rgba(19, 18, 18, .05); }
.btn.plain:hover .i { transform: translateY(3px); }
.btn.soft { background: var(--fill); }
.btn.soft:hover { background: var(--ink); color: #fff; }
.btn.lg { height: 52px; padding: 0 24px; border-radius: 14px; font-size: 16px; }
.btn:active { transform: scale(.97); }

/* ---------- 顶栏 ---------- */
.nav { position: fixed; top: 0; left: 0; right: 0; z-index: 30; display: flex; align-items: center; gap: 32px; height: 68px; padding: 0 32px; transition: background .25s, box-shadow .25s; }
.nav.stuck { background: rgba(247, 248, 250, .8); backdrop-filter: blur(24px) saturate(170%); -webkit-backdrop-filter: blur(24px) saturate(170%); box-shadow: 0 1px 0 var(--line); }
.brand { display: flex; align-items: center; gap: 10px; }
.brand .mark { width: 28px; height: 28px; border-radius: 50%; background: var(--ink); display: grid; place-items: center; }
.brand .mark svg { width: 17px; height: 17px; transition: transform .7s var(--ease); }
.brand:hover .mark svg { transform: rotate(60deg); }
.brand b { font-size: 16px; }
.nav-links { display: flex; gap: 4px; margin-right: auto; }
.nav-links a { height: 36px; padding: 0 12px; display: inline-flex; align-items: center; border-radius: 8px; font-size: 14px; color: var(--ink-2); transition: color .15s, background .15s; }
.nav-links a:hover, .nav-links a.on { color: var(--ink); background: rgba(19, 18, 18, .05); }

/* ---------- 第一屏 ---------- */
.hero { position: relative; padding: 148px 24px 0; text-align: center; }
.aurora { position: absolute; left: 0; right: 0; top: 0; height: 820px; overflow: hidden; pointer-events: none; -webkit-mask-image: linear-gradient(#000 50%, transparent); mask-image: linear-gradient(#000 50%, transparent); }
.aurora i { position: absolute; top: 0; left: 50%; border-radius: 50%; filter: blur(90px); animation: drift 24s ease-in-out infinite alternate; }
.aurora i:nth-child(1) { width: 680px; height: 380px; margin: 150px 0 0 -700px; background: #E8D2FF; opacity: .5; }
.aurora i:nth-child(2) { width: 720px; height: 400px; margin: 200px 0 0 40px; background: #C9DCFF; opacity: .55; animation-delay: -9s; animation-duration: 28s; }
.aurora i:nth-child(3) { width: 460px; height: 260px; margin: 30px 0 0 -230px; background: #FFE6D6; opacity: .45; animation-delay: -15s; animation-duration: 32s; }
@keyframes drift { from { transform: translate3d(-40px, -10px, 0) scale(1); } to { transform: translate3d(50px, 24px, 0) scale(1.12); } }
.hero > :not(.aurora) { position: relative; }
.kicker { display: inline-flex; align-items: center; gap: 8px; height: 34px; padding: 0 14px 0 5px; border-radius: 999px; background: rgba(255, 255, 255, .7); border: 1px solid #fff; font-size: 14px; color: var(--ink-2); animation: rise .8s var(--ease) both; }
.spark { width: 24px; height: 24px; border-radius: 50%; background: var(--ink); color: #D9CCFF; display: grid; place-items: center; flex: none; }
.spark .i { width: 13px; height: 13px; }
.hero h1 { margin-top: 28px; font-size: clamp(44px, 6.4vw, 84px); line-height: 1.12; font-weight: 500; letter-spacing: -.025em; color: #080808; animation: rise .8s var(--ease) .06s both; }
em { font-style: normal; }
.hero h1 em, .hl { background: linear-gradient(transparent 66%, var(--lilac) 66%, var(--lilac) 94%, transparent 94%); padding: 0 .06em; }
.lead { margin-top: 24px; font-size: clamp(16px, 1.5vw, 20px); line-height: 1.75; color: var(--ink-2); animation: rise .8s var(--ease) .12s both; }
.cta { margin-top: 36px; display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; animation: rise .8s var(--ease) .18s both; }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } }

/* 第一屏的画面：一条素材，图上有标号，右边是 AI 读到的每一层 */
.stage { margin: 64px auto 0; max-width: 1120px; padding: 12px; border-radius: 28px; text-align: left; background: rgba(255, 255, 255, .66); border: 1px solid #fff; backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); box-shadow: var(--lift); animation: rise 1s var(--ease) .28s both; }
.stage-top { display: flex; align-items: center; gap: 12px; padding: 4px 6px 12px 12px; }
.stage-cap { font-size: 14px; color: var(--ink-3); margin-right: auto; }
.stage-tabs { display: flex; gap: 4px; }
.stab { position: relative; display: inline-flex; align-items: center; gap: 8px; height: 40px; padding: 0 14px 0 5px; border-radius: 999px; font-size: 14px; color: var(--ink-2); overflow: hidden; transition: background .25s, color .25s; }
.stab img { width: 30px; height: 30px; border-radius: 50%; object-fit: cover; object-position: top; }
.stab:hover { background: rgba(19, 18, 18, .05); color: var(--ink); }
.stab.on { background: var(--ink); color: #fff; }
.stab.on::after { content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 100%; background: rgba(255, 255, 255, .5); transform-origin: left; animation: fill var(--dur, 6s) linear both; }
.stage.paused .stab.on::after { animation-play-state: paused; }
@keyframes fill { from { transform: scaleX(0); } }
.anno { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 12px; }
.anno-img { position: relative; display: grid; place-items: center; min-height: 440px; padding: 28px; border-radius: 18px; background: #F3F4F7; overflow: hidden; }
.frame { position: relative; display: inline-block; line-height: 0; animation: framein .6s var(--ease) both; }
.frame img { max-width: 100%; max-height: 384px; border-radius: 12px; box-shadow: 0 2px 6px rgba(19, 18, 18, .06), 0 18px 44px rgba(19, 18, 18, .14); }
.frame.gray img { filter: saturate(.55); }
@keyframes framein { from { opacity: 0; transform: scale(.96) translateY(10px); } }
.pin { position: absolute; width: 28px; height: 28px; margin: -14px 0 0 -14px; border-radius: 50%; background: var(--ink); color: #fff; font: 500 12px/28px var(--font-mono); text-align: center; box-shadow: 0 0 0 4px rgba(255, 255, 255, .85), 0 8px 18px rgba(19, 18, 18, .3); animation: pinin .5s var(--ease) both; animation-delay: calc(.35s + var(--i) * .45s); transition: transform .25s var(--ease), background .2s; }
.pin::after { content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 1.500px solid var(--ink); opacity: 0; animation: ping 2.400s ease-out infinite; animation-delay: calc(.8s + var(--i) * .45s); }
.pin.warn { background: var(--like); }
.pin.warn::after { border-color: var(--like); }
.pin.hot { transform: scale(1.25); }
@keyframes pinin { from { opacity: 0; transform: scale(.2); } }
@keyframes ping { 0% { opacity: .6; transform: scale(1); } 70%, 100% { opacity: 0; transform: scale(2.1); } }
.notes { display: grid; gap: 8px; align-content: center; padding: 4px; }
.nt { display: grid; grid-template-columns: 28px minmax(0, 1fr); gap: 2px 12px; align-items: start; padding: 16px 18px; border-radius: 16px; background: #fff; animation: notein .6s var(--ease) both; animation-delay: calc(.35s + var(--i) * .45s); transition: transform .25s var(--ease), box-shadow .25s; cursor: default; }
.nt:hover, .nt.hot { transform: translateX(-4px); box-shadow: var(--float); }
.nt .n { grid-row: span 2; width: 28px; height: 28px; border-radius: 50%; background: var(--ink); color: #fff; font: 500 12px/28px var(--font-mono); text-align: center; }
.nt.warn .n { background: var(--like); }
.nt small { font-size: 13px; color: var(--ink-3); }
.nt p { font-size: 16px; line-height: 1.55; }
.nt.taste { grid-template-columns: 28px minmax(0, 1fr); background: var(--ink); color: #fff; }
.nt.taste .n { background: var(--like); display: grid; place-items: center; }
.nt.taste.no .n { background: #fff; color: var(--ink); }
.nt.taste .n .i { width: 14px; height: 14px; }
.nt.taste.yes .n .i { fill: currentColor; }
.nt.taste small { color: rgba(255, 255, 255, .6); }
.nt.taste q { color: #fff; }
@keyframes notein { from { opacity: 0; transform: translateX(18px); } }

/* ---------- 通用的一屏 ---------- */
.sec { max-width: 1184px; margin: 0 auto; padding: 136px 32px 0; }
/* 垫了底色的一屏：一块圆角的浅灰区域，左右各留 16px */
.sec.band { position: relative; z-index: 0; margin-top: 136px; padding-top: 112px; padding-bottom: 112px; }
.sec.band::before { content: ""; position: absolute; z-index: -1; top: 0; bottom: 0; left: calc(50% - 50vw + 16px); right: calc(50% - 50vw + 16px); border-radius: 48px; background: #EEF0F4; }
.sec.band .tp, .sec.band .try { box-shadow: none; }
.eyebrow { font-size: 14px; color: var(--ink-3); margin-bottom: 14px; }
.sec h2, .end h2 { font-size: clamp(32px, 3.8vw, 52px); line-height: 1.2; font-weight: 500; letter-spacing: -.02em; color: #080808; }
.sub { margin-top: 18px; font-size: 18px; line-height: 1.75; color: var(--ink-2); max-width: 560px; }
.split { display: grid; grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); gap: 64px; align-items: center; }
.split.rev { grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr); }
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .8s var(--ease), transform .8s var(--ease); transition-delay: calc(var(--d, 0) * 90ms); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 为什么做：对话回放 ---------- */
.chat { display: grid; gap: 10px; align-content: start; padding: 24px; min-height: 0; border-radius: 28px; background: var(--card); border: 1px solid #fff; box-shadow: var(--lift); }
.msg { max-width: 82%; padding: 12px 16px; border-radius: 18px 18px 18px 6px; background: var(--fill); justify-self: start; opacity: 0; transform: translateY(14px) scale(.97); transform-origin: left bottom; transition: opacity .5s var(--ease), transform .5s var(--ease); transition-delay: calc(var(--i) * 620ms); }
.msg.me { justify-self: end; background: var(--ink); color: #fff; border-radius: 18px 18px 6px 18px; transform-origin: right bottom; }
.msg img { width: 132px; border-radius: 10px; margin-bottom: 10px; box-shadow: 0 6px 16px rgba(19, 18, 18, .14); }
.msg small { display: block; font-size: 12px; color: var(--ink-3); margin-bottom: 2px; }
.sys { justify-self: center; margin-top: 14px; padding: 8px 16px; border-radius: 999px; background: var(--mark); color: #5C4300; font-size: 14px; opacity: 0; transform: translateY(10px); transition: opacity .6s var(--ease), transform .6s var(--ease); transition-delay: calc(var(--i) * 620ms + 200ms); }
.chat.play .msg, .chat.play .sys { opacity: 1; transform: none; }

/* ---------- 不一样在哪：同一张图，两边读到的 ---------- */
.versus { margin-top: 48px; display: grid; grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr); gap: 16px; align-items: stretch; }
.vs { position: relative; display: grid; grid-template-rows: auto 1fr auto; gap: 14px; padding: 12px 12px 24px; border-radius: 28px; }
.vs.a { border: 1.500px dashed var(--line-2); }
.vs.b { background: var(--card); border: 1px solid #fff; box-shadow: var(--lift); }
.vs-h { display: flex; align-items: center; gap: 8px; padding: 10px 12px 0; font-size: 14px; color: var(--ink-3); }
.vs.b .vs-h { color: var(--ink); font-weight: 500; }
.vs-h .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ink); }
.vs-body { display: grid; gap: 12px; align-content: start; }
.vs.b .vs-body { grid-template-columns: 1fr; }
.vs-pic { border-radius: 16px; background: #F3F4F7; display: grid; place-items: center; padding: 20px; min-height: 240px; }
.vs.a .vs-pic { min-height: 300px; }
.vs-pic img { max-width: 100%; max-height: 220px; border-radius: 10px; box-shadow: 0 10px 26px rgba(19, 18, 18, .12); }
.vs.a .vs-pic img { filter: saturate(.7); opacity: .85; }
.vs-meta { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 8px; }
.vs-meta span { display: inline-flex; align-items: center; gap: 5px; height: 28px; padding: 0 10px; border-radius: 999px; background: var(--fill); font-size: 13px; color: var(--ink-2); }
.vs-meta .i { width: 13px; height: 13px; }
.vs-layers { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; align-content: start; }
.vs-layers .ly.t { min-height: 72px; }
.ly { padding: 12px 14px; border-radius: 14px; background: var(--bg); opacity: 0; transform: translateY(12px); transition: opacity .6s var(--ease), transform .6s var(--ease); transition-delay: calc(.2s + var(--i) * .22s); }
.versus.play .ly { opacity: 1; transform: none; }
.ly small { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--ink-3); margin-bottom: 2px; }
.ly small i { width: 6px; height: 6px; border-radius: 50%; background: var(--ink); }
.ly.warn small i { width: 10px; height: 2px; border-radius: 1px; background: var(--like); }
.ly p { font-size: 15px; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ly.t { background: var(--ink); color: #fff; display: flex; align-items: center; gap: 10px; }
.ly.t em { width: 26px; height: 26px; border-radius: 50%; background: var(--like); display: grid; place-items: center; flex: none; }
.ly.t em .i { width: 13px; height: 13px; fill: currentColor; }
.vs-read { margin: 0 12px; padding-top: 16px; border-top: 1px solid var(--line); font-size: 15px; color: var(--ink-2); }
.vs.a .vs-read { border-top-style: dashed; border-top-color: var(--line-2); }
.vs-read b { color: var(--ink); display: block; font-size: 18px; margin-top: 2px; }
.vs.b .vs-read b span { background: linear-gradient(transparent 62%, var(--lilac) 62%); }

/* ---------- 被否的稿子也是资产 ---------- */
.lesson { position: relative; display: grid; grid-template-columns: minmax(0, .78fr) minmax(0, 1fr); gap: 20px; align-items: center; }
.shot { position: relative; padding: 14px; border-radius: 28px; background: #EEF0F3; }
.shot img { width: 100%; border-radius: 18px; filter: saturate(.6); }
.qc { position: absolute; padding: 6px 12px; border-radius: 12px; background: var(--mark); color: #5C4300; font-size: 14px; white-space: nowrap; box-shadow: 0 8px 20px rgba(92, 67, 0, .16); opacity: 0; transform: scale(.7) rotate(var(--r, 0deg)); transition: opacity .5s var(--ease), transform .5s var(--ease); transition-delay: calc(.2s + var(--i) * .3s); }
.lesson.play .qc { opacity: 1; transform: rotate(var(--r, 0deg)); }
.stamp { position: absolute; right: -10px; top: 18px; display: inline-flex; align-items: center; gap: 6px; height: 34px; padding: 0 14px 0 10px; border-radius: 999px; background: var(--ink); color: #fff; font-size: 14px; font-weight: 500; box-shadow: var(--float); transform: rotate(6deg); }
.stamp .i { width: 15px; height: 15px; }
.list { padding: 24px 24px 20px; border-radius: 24px; background: var(--card); border: 1px solid #fff; box-shadow: var(--lift); }
.list h4 { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--ink-3); margin-bottom: 14px; }
.list h4 .spark { width: 22px; height: 22px; }
.list li { display: grid; grid-template-columns: 24px 1fr; gap: 12px; align-items: start; padding: 12px 0; border-top: 1px solid var(--line); list-style: none; }
.list ul { margin: 0; padding: 0; }
.list li i { width: 24px; height: 24px; border-radius: 50%; border: 1.500px solid var(--line-2); display: grid; place-items: center; color: transparent; transition: background .35s var(--ease), border-color .35s, color .35s, transform .35s var(--ease); transition-delay: calc(1.5s + var(--i) * .28s); }
.list li i .i { width: 13px; height: 13px; stroke-width: 2.4; }
.lesson.play .list li i { background: var(--ink); border-color: var(--ink); color: #fff; transform: scale(1.06); }
.list li span { font-size: 15px; line-height: 1.6; }
.list li span b { font-family: var(--font-mono); font-size: .92em; }
.list li small { display: block; font-size: 13px; color: var(--ink-3); }

/* ---------- taste 看得见 ---------- */
.tastev { margin-top: 48px; display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: 16px; }
.tp { padding: 28px; border-radius: 28px; background: var(--card); border: 1px solid #fff; }
.tp h4 { display: flex; align-items: baseline; gap: 8px; font-size: 14px; color: var(--ink-3); margin-bottom: 16px; }
.tp h4 b { color: var(--ink); font-size: 16px; }
.tp-col { display: grid; gap: 16px; align-content: start; }
.tp h4.gap { margin-top: 32px; }
.pal { display: flex; height: 84px; border-radius: 16px; overflow: hidden; box-shadow: inset 0 0 0 1px var(--line); }
.pal i { flex: var(--w) 1 0; min-width: 4px; background: var(--c); transform: scaleY(0); transform-origin: bottom; transition: transform .7s var(--ease); transition-delay: calc(var(--i) * 28ms); position: relative; }
.tastev.play .pal i { transform: none; }
.pal i:hover::after { content: attr(data-hex); position: absolute; left: 50%; top: 8px; transform: translateX(-50%); padding: 2px 8px; border-radius: 6px; background: rgba(19, 18, 18, .86); color: #fff; font: 12px var(--font-mono); white-space: nowrap; z-index: 2; }
.bars { display: grid; gap: 12px; }
.bar { display: grid; grid-template-columns: 108px 1fr 44px; align-items: center; gap: 14px; font-size: 15px; }
.bar span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar u { height: 10px; border-radius: 5px; background: var(--fill); overflow: hidden; text-decoration: none; }
.bar u i { display: block; height: 100%; width: var(--p); border-radius: 5px; background: var(--ink); transform: scaleX(0); transform-origin: left; transition: transform 1s var(--ease); transition-delay: calc(.2s + var(--i) * 90ms); }
.tastev.play .bar u i { transform: none; }
.bar em { font: 13px var(--font-mono); color: var(--ink-3); text-align: right; }
.wallm { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; }
.wallm a { position: relative; aspect-ratio: 1; border-radius: 12px; overflow: hidden; background: var(--fill); opacity: 0; transform: scale(.9); transition: opacity .5s var(--ease), transform .5s var(--ease); transition-delay: calc(var(--i) * 60ms); }
.tastev.play .wallm a { opacity: 1; transform: none; }
.wallm a:hover { transform: translateY(-3px); box-shadow: var(--float); transition-delay: 0s; }
.wallm img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.wallm .hb { position: absolute; right: 6px; top: 6px; width: 22px; height: 22px; border-radius: 50%; background: var(--like); color: #fff; display: grid; place-items: center; }
.wallm .hb .i { width: 11px; height: 11px; fill: currentColor; }
.wallm a.no img { filter: grayscale(1); opacity: .45; }
.wallm a.no .hb { background: var(--ink); }
.wallm a.no .hb .i { fill: none; }
.reasons { display: flex; flex-wrap: wrap; gap: 6px; }
.reasons span { display: inline-flex; align-items: center; height: 34px; padding: 0 14px; border-radius: 999px; background: var(--ink); color: #fff; font-size: 14px; opacity: 0; transform: translateY(8px); transition: opacity .5s var(--ease), transform .5s var(--ease); transition-delay: calc(.3s + var(--i) * 80ms); }
.reasons span em { margin-left: 6px; font: 12px var(--font-mono); color: rgba(255, 255, 255, .55); }
.tastev.play .reasons span { opacity: 1; transform: none; }
.reasons.yes span { background: #FFE9EC; color: #B4172B; }
.reasons.yes span em { color: rgba(180, 23, 43, .55); }

/* ---------- 闭环 ---------- */
.loop { margin-top: 56px; display: grid; grid-template-columns: minmax(0, 520px) minmax(0, 1fr); gap: 56px; align-items: center; }
.ring { position: relative; aspect-ratio: 1; }
.ring svg { position: absolute; inset: 0; width: 100%; height: 100%; transform: rotate(-90deg); }
.ring circle { fill: none; }
.ring .track { stroke: var(--line-2); stroke-dasharray: .4 1.8; stroke-linecap: round; stroke-width: .7; }
.ring .arc { stroke: var(--ink); stroke-width: .8; stroke-linecap: round; stroke-dasharray: 263.900; stroke-dashoffset: 263.900; transition: stroke-dashoffset .9s var(--ease); }
.core { position: absolute; inset: 27%; border-radius: 50%; background: var(--card); border: 1px solid #fff; display: grid; place-content: center; text-align: center; box-shadow: var(--lift); transition: transform .5s var(--ease); }
.core.pulse { animation: pulse .9s var(--ease); }
@keyframes pulse { 0% { transform: scale(1); box-shadow: var(--lift); } 40% { transform: scale(1.06); box-shadow: 0 0 0 18px rgba(227, 217, 255, .55), var(--lift); } 100% { transform: scale(1); box-shadow: 0 0 0 36px rgba(227, 217, 255, 0), var(--lift); } }
.core small { font-size: 14px; color: var(--ink-3); }
.core b { font-size: clamp(34px, 4vw, 52px); line-height: 1.1; font-weight: 500; letter-spacing: -.02em; background: linear-gradient(transparent 66%, var(--lilac) 66%, var(--lilac) 94%, transparent 94%); padding: 0 .08em; }
.core span { margin-top: 10px; font-size: 13px; color: var(--ink-2); }
.core span i { font-style: normal; font-weight: 500; color: var(--ink); font-variant-numeric: tabular-nums; }
.node { position: absolute; transform: translate(-50%, -50%); display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 16px 0 6px; border-radius: 999px; background: var(--card); border: 1px solid #fff; font-size: 15px; font-weight: 500; white-space: nowrap; box-shadow: 0 4px 14px rgba(19, 18, 18, .06); transition: background .3s, color .3s, transform .4s var(--ease), box-shadow .3s; }
.node em { width: 32px; height: 32px; border-radius: 50%; background: var(--fill); display: grid; place-items: center; font: 500 12px var(--font-mono); color: var(--ink-2); transition: background .3s, color .3s; }
.node:hover { transform: translate(-50%, -50%) scale(1.05); }
.node.on { background: var(--ink); color: #fff; transform: translate(-50%, -50%) scale(1.08); box-shadow: 0 12px 30px rgba(19, 18, 18, .25); }
.node.on em { background: rgba(255, 255, 255, .16); color: #fff; }
.node.done em { background: var(--ink); color: #fff; }
.step { padding: 10px 10px 32px; border-radius: 28px; background: var(--card); border: 1px solid #fff; }
.sv { position: relative; height: 280px; border-radius: 18px; background: #F3F4F7; overflow: hidden; }
.sv > * { animation: stepin .6s var(--ease) both; }
.sv > *:nth-child(2) { animation-delay: .08s; }
.sv > *:nth-child(3) { animation-delay: .16s; }
.sv > *:nth-child(4) { animation-delay: .24s; }
.sv > *:nth-child(5) { animation-delay: .32s; }
.sv > *:nth-child(6) { animation-delay: .4s; }
@keyframes stepin { from { opacity: 0; translate: 0 14px; } }
.step .idx { margin: 26px 22px 0; font: 13px var(--font-mono); color: var(--ink-3); }
.step h3 { margin: 6px 22px 0; font-size: 30px; line-height: 1.3; font-weight: 500; letter-spacing: -.015em; }
.step p:not(.idx) { margin: 8px 22px 0; color: var(--ink-2); min-height: 52px; }
.step .pbars { margin: 22px 22px 0; display: flex; gap: 6px; }
.step .pbars i { flex: 1; height: 3px; border-radius: 2px; background: var(--fill-2); overflow: hidden; position: relative; cursor: pointer; }
.step .pbars i.done { background: var(--ink); }
.step .pbars i.on::after { content: ""; position: absolute; inset: 0; background: var(--ink); transform-origin: left; animation: fill var(--dur, 3.400s) linear both; }
.loop.paused .pbars i.on::after { animation-play-state: paused; }
/* 小画面里的零件 */
.th { position: absolute; border-radius: 12px; overflow: hidden; background: #fff; border: 4px solid #fff; box-shadow: 0 10px 28px rgba(19, 18, 18, .12); }
.th img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.bd { position: absolute; width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center; color: #fff; box-shadow: 0 6px 16px rgba(19, 18, 18, .2); }
.bd.like { background: var(--like); }
.bd.like .i { fill: currentColor; }
.bd.no { background: var(--ink); }
.bd .i { width: 16px; height: 16px; }
.chipx { position: absolute; display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 12px; border-radius: 999px; background: #fff; font-size: 13px; color: var(--ink); box-shadow: 0 6px 18px rgba(19, 18, 18, .1); white-space: nowrap; }
.chipx.dark { background: var(--ink); color: #fff; }
.chipx .i { width: 13px; height: 13px; }
.bubble { position: absolute; display: inline-flex; align-items: center; gap: 6px; padding: 10px 14px; border-radius: 16px 16px 16px 4px; background: #fff; font-size: 14px; box-shadow: 0 8px 22px rgba(19, 18, 18, .1); max-width: 78%; }
.bubble.me { border-radius: 16px 16px 4px 16px; background: var(--ink); color: #fff; }
.bubble .i { width: 14px; height: 14px; }
.tray { position: absolute; left: 12%; right: 12%; bottom: 26px; height: 64px; border-radius: 16px; border: 1.500px dashed var(--line-2); display: flex; align-items: center; justify-content: center; gap: 8px; color: var(--ink-3); font-size: 13px; background: rgba(255, 255, 255, .6); }
.lines { position: absolute; display: grid; gap: 8px; padding: 14px 16px; border-radius: 14px; background: #fff; box-shadow: 0 10px 28px rgba(19, 18, 18, .1); font-size: 13px; }
.lines div { display: flex; gap: 8px; align-items: baseline; white-space: nowrap; }
.lines span { color: var(--ink-2); }
.taste-card { position: absolute; inset: 28px 13%; padding: 18px 20px; border-radius: 16px; background: #fff; box-shadow: 0 14px 34px rgba(19, 18, 18, .1); display: grid; align-content: start; gap: 12px; }
.taste-card h4 { font-size: 13px; color: var(--ink-3); display: flex; align-items: center; gap: 6px; }
.taste-card h4 .i { width: 14px; height: 14px; }
.taste-card div { display: flex; flex-wrap: wrap; gap: 6px; }
.taste-card span { height: 28px; padding: 0 11px; display: inline-flex; align-items: center; border-radius: 999px; font-size: 13px; }
.taste-card .yes span { background: #FFE9EC; color: #B4172B; }
.taste-card .nope span { background: var(--ink); color: #fff; }

/* ---------- 试一下 ---------- */
.try { margin-top: 48px; padding: 28px; border-radius: 28px; background: var(--card); border: 1px solid #fff; box-shadow: var(--lift); }
.asks { display: flex; flex-wrap: wrap; gap: 8px; }
.ask { display: inline-flex; align-items: center; gap: 8px; height: 48px; padding: 0 20px 0 8px; border-radius: 999px; background: var(--fill); color: var(--ink-2); font-size: 16px; transition: background .2s, color .2s, transform .2s var(--ease); }
.ask .spark { background: #fff; color: var(--ink); transition: background .2s, color .2s; }
.ask:hover { color: var(--ink); transform: translateY(-2px); }
.ask.on { background: var(--ink); color: #fff; }
.ask.on .spark { background: rgba(255, 255, 255, .16); color: #D9CCFF; }
.trace { margin-top: 24px; display: grid; gap: 6px; min-height: 108px; align-content: start; }
.tr { display: flex; align-items: center; gap: 10px; font-size: 15px; color: var(--ink-2); opacity: 0; transform: translateX(-8px); animation: trin .45s var(--ease) both; animation-delay: calc(var(--i) * 420ms); }
.tr i { width: 22px; height: 22px; border-radius: 50%; background: var(--ink); color: #fff; display: grid; place-items: center; flex: none; }
.tr i .i { width: 12px; height: 12px; stroke-width: 2.4; }
.tr b { color: var(--ink); }
.tr .tg { display: inline-flex; align-items: center; height: 26px; padding: 0 10px; margin: 0 2px; border-radius: 999px; background: var(--fill); font-size: 13px; color: var(--ink); }
.tr.skip i { background: var(--like); }
@keyframes trin { to { opacity: 1; transform: none; } }
.results { margin-top: 20px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.rs { position: relative; display: grid; gap: 4px; padding: 6px 6px 14px; border-radius: 18px; background: var(--bg); opacity: 0; transform: translateY(16px); animation: rsin .6s var(--ease) both; animation-delay: calc(var(--at, 1.4s) + var(--i) * 110ms); transition: transform .3s var(--ease), box-shadow .3s, background .3s; }
.rs:hover { transform: translateY(-4px); background: #fff; box-shadow: var(--lift); }
.rs .pic { aspect-ratio: 4 / 3; border-radius: 12px; overflow: hidden; background: var(--fill); }
.rs .pic img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform .6s var(--ease); }
.rs:hover .pic img { transform: scale(1.04); }
.rs b { margin: 8px 8px 0; font-size: 14px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
.rs p { margin: 0 8px; font-size: 13px; line-height: 1.55; color: var(--ink-2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.rs p u { text-decoration: none; color: var(--ink); font-weight: 500; margin-right: 6px; }
.rs .hb { position: absolute; right: 14px; top: 14px; width: 26px; height: 26px; border-radius: 50%; background: var(--like); color: #fff; display: grid; place-items: center; box-shadow: 0 4px 10px rgba(240, 56, 78, .35); }
.rs .hb .i { width: 13px; height: 13px; fill: currentColor; }
.rs.skipped { background: none; border: 1.500px dashed var(--line-2); }
.rs.skipped .pic img { filter: grayscale(1); opacity: .35; }
.rs.skipped b { color: var(--ink-3); text-decoration: line-through; }
.rs.skipped .hb { background: var(--ink); box-shadow: none; }
.rs.skipped .hb .i { fill: none; }
@keyframes rsin { to { opacity: 1; transform: none; } }
.try-foot { margin-top: 20px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; color: var(--ink-3); font-size: 14px; }

/* ---------- 调研专题：一条时间线 ---------- */
.rail { -webkit-mask-image: linear-gradient(90deg, #000 calc(100% - 96px), transparent); mask-image: linear-gradient(90deg, #000 calc(100% - 96px), transparent); position: relative; margin-top: 56px; display: grid; grid-auto-flow: column; grid-auto-columns: minmax(232px, 1fr); gap: 16px; overflow-x: auto; scrollbar-width: none; padding: 34px 4px 44px; margin-bottom: -44px; }
.rail::-webkit-scrollbar { display: none; }
.rail::before { content: ""; position: absolute; left: 0; right: 0; top: 10px; height: 1.500px; background: repeating-linear-gradient(90deg, var(--line-2) 0 6px, transparent 6px 12px); min-width: 100%; }
.tpc { position: relative; display: grid; gap: 4px; padding: 8px 8px 18px; border-radius: 20px; background: var(--card); border: 1px solid #fff; transition: transform .35s var(--ease), box-shadow .35s var(--ease); }
.tpc::before { content: ""; position: absolute; left: 20px; top: -30px; width: 11px; height: 11px; border-radius: 50%; background: var(--ink); box-shadow: 0 0 0 4px var(--bg); }
.tpc:hover { transform: translateY(-4px); box-shadow: var(--lift); }
.tpc .pics { display: grid; grid-template-columns: 1.5fr 1fr; grid-template-rows: 1fr 1fr; gap: 2px; aspect-ratio: 16 / 10; border-radius: 12px; overflow: hidden; background: var(--fill); margin-bottom: 8px; }
.tpc .pics img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.tpc .pics img:first-child { grid-row: span 2; }
.tpc .pics.n1 { grid-template-columns: 1fr; }
.tpc .pics.n2 { grid-template-rows: 1fr; }
.tpc .pics.n2 img:first-child { grid-row: auto; }
.tpc time { margin: 0 10px; font: 12px var(--font-mono); color: var(--ink-3); }
.tpc b { margin: 0 10px; font-size: 16px; }
.tpc span { margin: 0 10px; font-size: 13px; color: var(--ink-2); }

/* ---------- 收尾：一整块深色区域 ---------- */
.end { position: relative; margin: 136px 16px 16px; padding: 104px 48px 0; border-radius: 48px; background: #0E0E10; color: #fff; overflow: hidden; }
.end::before { content: ""; position: absolute; right: -8%; top: -30%; width: 62%; height: 110%; background: radial-gradient(closest-side, rgba(170, 140, 255, .30), transparent 70%), radial-gradient(closest-side at 70% 70%, rgba(110, 160, 255, .22), transparent 70%); filter: blur(30px); pointer-events: none; }
.end-in { position: relative; max-width: 1184px; margin: 0 auto; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, .95fr); gap: 56px; align-items: center; }
.end .eyebrow { color: rgba(255, 255, 255, .5); }
.end h2 { font-size: clamp(36px, 4.6vw, 64px); line-height: 1.16; font-weight: 500; letter-spacing: -.025em; color: #fff; }
.end-sub { margin-top: 22px; font-size: 18px; line-height: 1.75; color: rgba(255, 255, 255, .62); max-width: 440px; }
.end-cta { margin-top: 36px; display: flex; gap: 10px; flex-wrap: wrap; }
.btn.light { background: #fff; color: var(--ink); }
.btn.light:hover { background: var(--lilac); }
.btn.light:hover .i { transform: translateX(3px); }
.btn.line { color: #fff; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .26); }
.btn.line:hover { background: rgba(255, 255, 255, .1); box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .5); }
/* 右边：攒下来的 taste。几张喜欢的图错开叠着，旁边飘着她说过的词 */
.end-vis { position: relative; height: 420px; }
.ev { position: absolute; border-radius: 18px; overflow: hidden; border: 5px solid #fff; background: #fff; box-shadow: 0 30px 70px rgba(0, 0, 0, .5); opacity: 0; transform: translateY(40px) rotate(var(--r)) scale(.92); transition: opacity .8s var(--ease), transform .9s var(--ease); transition-delay: calc(var(--i) * 120ms); }
.end-vis.play .ev { opacity: 1; transform: rotate(var(--r)); }
.end-vis.play .ev:hover { transform: rotate(0deg) translateY(-8px) scale(1.03); z-index: 5; transition-delay: 0s; }
.ev img { width: 100%; height: 100%; object-fit: cover; object-position: top; }
.ev .hb { position: absolute; right: 10px; top: 10px; width: 30px; height: 30px; border-radius: 50%; background: var(--like); color: #fff; display: grid; place-items: center; box-shadow: 0 6px 14px rgba(240, 56, 78, .45); }
.ev .hb .i { width: 15px; height: 15px; fill: currentColor; }
.ec { position: absolute; display: inline-flex; align-items: center; gap: 6px; height: 36px; padding: 0 14px; border-radius: 999px; font-size: 14px; white-space: nowrap; z-index: 6; opacity: 0; transform: translateY(14px); transition: opacity .7s var(--ease), transform .7s var(--ease); transition-delay: calc(.5s + var(--i) * 130ms); animation: bob 6s ease-in-out infinite; animation-delay: calc(var(--i) * -1.3s); }
.end-vis.play .ec { opacity: 1; transform: none; }
.ec.yes { background: #fff; color: #B4172B; box-shadow: 0 10px 26px rgba(0, 0, 0, .35); }
.ec.no { background: rgba(255, 255, 255, .12); color: #fff; box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .22); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.ec .i { width: 14px; height: 14px; }
.ec.yes .i { fill: currentColor; }
@keyframes bob { 0%, 100% { translate: 0 0; } 50% { translate: 0 -8px; } }
.foot { position: relative; max-width: 1184px; margin: 96px auto 0; padding: 28px 0; border-top: 1px solid rgba(255, 255, 255, .12); display: flex; align-items: center; gap: 28px; font-size: 14px; color: rgba(255, 255, 255, .55); }
.foot .brand .mark { background: #fff; }
.foot .brand b { color: #fff; }
.foot nav { display: flex; gap: 4px; margin-right: auto; }
.foot nav a { height: 34px; padding: 0 12px; display: inline-flex; align-items: center; border-radius: 8px; transition: color .15s, background .15s; }
.foot nav a:hover { color: #fff; background: rgba(255, 255, 255, .08); }
/* 最底下一个很大的 taste，只描边，被圆角裁掉一半 */
.giant { position: relative; margin: 8px 0 -0.24em; text-align: center; font-size: clamp(140px, 27vw, 420px); line-height: .84; font-weight: 500; letter-spacing: -.045em; color: transparent; -webkit-text-stroke: 1px rgba(255, 255, 255, .16); background: linear-gradient(180deg, rgba(255, 255, 255, .10), rgba(255, 255, 255, 0) 70%); -webkit-background-clip: text; background-clip: text; user-select: none; pointer-events: none; }

.toast { position: fixed; left: 50%; bottom: 28px; z-index: 90; transform: translate(-50%, 16px); padding: 10px 18px; border-radius: 999px; background: var(--ink); color: #fff; font-size: 14px; opacity: 0; pointer-events: none; transition: opacity .2s, transform .28s var(--ease); white-space: nowrap; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- 细节 ----------
   排版和配色不动，只磨三样。
   边缘：白卡和缩略图加一圈几乎看不见的细线，黑按钮顶上一线高光，深色块盖一层极细的颗粒（盖住渐变的色带）。
   排字：标题按词断行（脚本切好词，加 .ph），行首不落标点；选中文字用淡紫。
   动效：标题下那一笔淡紫是画出来的；顶栏当前项是一颗会滑动的底；AI 回话前先冒三个点；百分比从 0 数上去。 */
::selection { background: var(--lilac); }
html { -webkit-tap-highlight-color: transparent; }
h1, h2, h3 { text-wrap: balance; text-spacing-trim: trim-start; }
.sub, .lead, .end-sub, .step p, .nt p, .list li span { text-wrap: pretty; }
.ph { word-break: keep-all; overflow-wrap: anywhere; }
/* 边缘 */
.kicker { box-shadow: 0 0 0 1px rgba(19, 18, 18, .03), 0 1px 2px rgba(19, 18, 18, .04); }
.nt, .step, .tpc, .sec.band .tp, .sec.band .try { box-shadow: var(--hair); }
.nt.taste { box-shadow: none; }
.rs .pic, .tpc .pics { position: relative; }
.wallm a::after, .rs .pic::after, .tpc .pics::after { content: ""; position: absolute; inset: 0; border-radius: inherit; box-shadow: inset 0 0 0 1px rgba(19, 18, 18, .06); pointer-events: none; }
.frame img, .vs-pic img, .msg img, .shot img { outline: 1px solid rgba(19, 18, 18, .06); outline-offset: -1px; }
.btn.dark { box-shadow: inset 0 1px 0 rgba(255, 255, 255, .12); }
.btn.dark:hover { box-shadow: inset 0 1px 0 rgba(255, 255, 255, .14), 0 10px 26px rgba(19, 18, 18, .18); }
.btn.light { box-shadow: inset 0 -1px 0 rgba(19, 18, 18, .1); }
.end { box-shadow: inset 0 1px 0 rgba(255, 255, 255, .07); }
.end::after { content: ""; position: absolute; inset: 0; z-index: 0; border-radius: inherit; pointer-events: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E"); }
.end-in, .foot, .giant { z-index: 1; }
/* 每一屏的小标题前面一个编号 */
main { counter-reset: sec; }
.sec .eyebrow { display: flex; align-items: center; gap: 10px; }
.sec .eyebrow::before { counter-increment: sec; content: counter(sec, decimal-leading-zero); font: 12px var(--font-mono); color: var(--ink); }
/* 标题下的淡紫：一笔画出来 */
.hero h1 em { background-repeat: no-repeat; animation: mark 1s var(--ease) .55s both; }
@keyframes mark { from { background-size: 0 100%; } to { background-size: 100% 100%; } }
.vs.b .vs-read b span { background-repeat: no-repeat; background-size: 0 100%; transition: background-size .9s var(--ease) 1.3s; }
.versus.play .vs.b .vs-read b span { background-size: 100% 100%; }
/* 标题进场：从一点点虚到实 */
:is(.eyebrow, h2, .sub, .end-sub).reveal { filter: blur(4px); transition: opacity .8s var(--ease), transform .8s var(--ease), filter .8s var(--ease); transition-delay: calc(var(--d, 0) * 90ms); }
:is(.eyebrow, h2, .sub, .end-sub).reveal.in { filter: none; }
/* 顶栏：当前项的底会滑过去 */
.nav-links { position: relative; }
.nav-ind { position: absolute; left: 0; top: 0; width: var(--w, 0); height: 36px; border-radius: 8px; background: rgba(19, 18, 18, .05); transform: translateX(var(--x, 0)); opacity: 0; pointer-events: none; transition: transform .4s var(--ease), width .4s var(--ease), opacity .25s; }
.nav-ind.show { opacity: 1; }
.nav-links a.on, .nav-links a.on:hover { background: none; }
/* 对话：AI 回话前先冒三个点 */
.msg.think { position: relative; }
.msg.think .tx { display: block; opacity: 0; transition: opacity .4s var(--ease); transition-delay: calc(var(--i) * 620ms + 1000ms); }
.msg.think .dots { position: absolute; left: 14px; bottom: 19px; display: flex; gap: 4px; transition: opacity .25s; transition-delay: calc(var(--i) * 620ms + 900ms); }
.chat.play .msg.think .tx { opacity: 1; }
.chat.play .msg.think .dots { opacity: 0; }
.dots b { width: 6px; height: 6px; border-radius: 50%; background: var(--ink-3); animation: blink 1.1s ease-in-out infinite; }
.dots b:nth-child(2) { animation-delay: .16s; }
.dots b:nth-child(3) { animation-delay: .32s; }
@keyframes blink { 0%, 60%, 100% { opacity: .35; transform: none; } 30% { opacity: 1; transform: translateY(-3px); } }

/* ---------- 滚动条：全站一种 ----------
   细细一条圆角的灰，平时不显示，鼠标移到那块区域上才出来；移到滚动条上再深一点、粗一点。
   深色的代码块里用浅色。横着滑的那几排（专题、目录、小图）不显示滚动条。 */
::-webkit-scrollbar { width: 10px; height: 10px; background: transparent; }
::-webkit-scrollbar-track, ::-webkit-scrollbar-corner { background: transparent; }
::-webkit-scrollbar-button { display: none; }
::-webkit-scrollbar-thumb { border: 3px solid transparent; border-radius: 10px; background-clip: content-box; background-color: transparent; }
:hover::-webkit-scrollbar-thumb { background-color: rgba(19, 18, 18, .16); }
::-webkit-scrollbar-thumb:hover { border-width: 2px; background-color: rgba(19, 18, 18, .32); }
::-webkit-scrollbar-thumb:active { border-width: 2px; background-color: rgba(19, 18, 18, .44); }
@supports not selector(::-webkit-scrollbar) { /* 不认上面那套写法的浏览器 */
  * { scrollbar-width: thin; scrollbar-color: transparent transparent; }
  *:hover { scrollbar-color: rgba(19, 18, 18, .2) transparent; }
}

/* ---------- 把每个模块压矮（桌面） ----------
   排版和配色都不动：还是上面标题、下面画面，浅色底、白卡、底部一块深色。
   只收三样：模块之间的留白、卡片里的留白、画面的高度。目标是一个模块在一屏里看得全。 */
@media (min-width: 1041px) {
  html { scroll-padding-top: 80px; }
  /* 第一屏 */
  .hero { padding-top: 108px; }
  .hero h1 { margin-top: 20px; font-size: clamp(44px, 5.2vw, 72px); }
  .lead { margin-top: 14px; font-size: 18px; }
  .cta { margin-top: 26px; }
  .stage { margin-top: 36px; }
  .stage-top { padding: 2px 4px 10px 12px; }
  .stab { height: 36px; }
  .stab img { width: 26px; height: 26px; }
  .anno-img { min-height: 280px; padding: 18px; }
  .frame img { max-height: 250px; }
  .notes { gap: 6px; }
  .nt { padding: 11px 16px; }
  .nt p { font-size: 15px; }
  /* 每一屏的节奏 */
  .sec { padding-top: 88px; }
  .sec h2 { font-size: clamp(32px, 3.4vw, 46px); }
  .sub { margin-top: 12px; font-size: 17px; }
  .sec.band { margin-top: 88px; padding-top: 64px; padding-bottom: 64px; }
  /* 为什么做 */
  .chat { padding: 20px; gap: 8px; }
  .msg { padding: 10px 14px; }
  .msg img { width: 112px; }
  /* 不一样在哪 */
  .versus { margin-top: 32px; }
  .vs { padding: 10px 10px 20px; gap: 12px; }
  .vs-pic { min-height: 0; height: 144px; padding: 12px; }
  .vs-pic img { max-height: 120px; }
  .vs.a .vs-body { grid-template-rows: minmax(0, 1fr) auto; align-content: stretch; }
  .vs.a .vs-pic { height: auto; min-height: 200px; }
  .vs.a .vs-pic img { max-height: 190px; }
  .ly { padding: 10px 14px; }
  .ly p { font-size: 14px; }
  .vs-layers .ly.t { min-height: 0; }
  .vs-read { padding-top: 12px; }
  /* taste */
  .tastev { margin-top: 32px; }
  .tp { padding: 22px; }
  .tp h4 { margin-bottom: 12px; }
  .tp h4.gap { margin-top: 22px; }
  .pal { height: 52px; }
  .bars { gap: 8px; }
  .wallm a { aspect-ratio: 16 / 10; }
  .reasons span { height: 30px; }
  /* 闭环 */
  .loop { margin-top: 36px; grid-template-columns: minmax(0, 440px) minmax(0, 1fr); }
  .step { padding-bottom: 26px; }
  .step .idx { margin-top: 22px; }
  .step .pbars { margin-top: 18px; }
  /* 试一下：几步过程横着排，一行放不下再换行 */
  .try { margin-top: 32px; padding: 24px; }
  .trace { margin-top: 18px; min-height: 58px; display: flex; flex-wrap: wrap; align-content: center; gap: 6px 28px; }
  .results { margin-top: 16px; }
  .rs .pic { aspect-ratio: 16 / 9; }
  .try-foot { margin-top: 12px; }
  /* 调研专题 */
  .rail { margin-top: 24px; }
  /* 收尾 */
  .end { margin-top: 88px; padding-top: 80px; }
  .end h2 { font-size: clamp(36px, 4vw, 56px); }
  .end-sub { margin-top: 18px; }
  .end-cta { margin-top: 30px; }
  .end-vis { height: 380px; }
  .foot { margin-top: 56px; }
  .giant { font-size: clamp(140px, 23vw, 340px); }
}

@media (max-width: 1040px) {
  .nav-links { display: none; }
  .nav { justify-content: space-between; padding: 0 20px; }
  .hero { padding-top: 128px; }
  .stage-cap { display: none; }
  .stage-tabs { overflow-x: auto; scrollbar-width: none; }
  .anno, .split, .split.rev, .versus, .tastev, .loop, .lesson, .vs-layers { grid-template-columns: 1fr; }
  .split { gap: 32px; }
  .split.rev .copy { order: -1; }
  .anno-img { min-height: 320px; padding: 20px; }
  .frame img { max-height: 300px; }
  .sec { padding: 120px 20px 0; }
  .chat { min-height: 0; }
  .ring { max-width: 440px; margin: 0 auto; width: 100%; }
  .loop { gap: 32px; }
  .node { height: 38px; font-size: 13px; padding: 0 12px 0 5px; }
  .node em { width: 28px; height: 28px; }
  .results { grid-template-columns: repeat(2, 1fr); }
  .sec.band { margin-top: 96px; padding-top: 72px; padding-bottom: 72px; }
  .sec.band::before { left: calc(50% - 50vw + 8px); right: calc(50% - 50vw + 8px); border-radius: 32px; }
  .end { margin: 96px 8px 8px; padding: 64px 24px 0; border-radius: 32px; }
  .end-in { grid-template-columns: 1fr; gap: 24px; }
  .end-vis { height: 320px; }
  .foot { flex-wrap: wrap; gap: 12px; margin-top: 56px; }
  .foot nav { display: none; }
  .shot { margin: 0 28px; }
  .ask { height: auto; min-height: 48px; padding: 8px 18px 8px 8px; text-align: left; font-size: 15px; }
  .stab { flex: none; }
  .rail { grid-auto-columns: 72%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0s !important; transition-duration: .01ms !important; transition-delay: 0s !important; }
  .reveal, .msg, .sys, .ly, .qc, .wallm a, .reasons span { opacity: 1; transform: none; filter: none; }
  .msg.think .tx { opacity: 1; }
  .dots { display: none; }
}