/* 首页与价格页共用；政策页继续使用 styles.css。 */
@font-face {
  font-family: 'Newsreader Display';
  src: url('/assets/fonts/newsreader-display-italic.woff2') format('woff2');
  font-style: italic; font-weight: 400; font-display: swap;
}
:root {
  --ink: #202024; --muted: #626269; --line: #e8e8eb;
  --accent: #ff5427; --accent-deep: #c84825; --soft: #fff4ed; --warm-line: #f1d6c5;
  --night: #0f0f13; --night-2: #17171d; --night-line: #2a2a33; --night-ink: #ededf2; --night-muted: #9b9ba8;
  /* 插件面板真实配色 */
  --rt-bg: #fdfcfa; --rt-line: #ece8e3; --rt-ink: #1f1f23; --rt-muted: #8a8a90; --rt-hl: #fde6de; --rt-hl-ink: #d8431b;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --serif: 'Newsreader Display', Charter, Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, 'SF Mono', Menlo, monospace;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; color: var(--ink); background: #fff; font: 17px/1.7 var(--sans); -webkit-font-smoothing: antialiased; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
img, svg { display: block; }
h1, h2, h3 { text-wrap: balance; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.wrap { max-width: 1240px; margin: auto; padding: 0 48px; }

/* ---------- nav：滚动后吸顶并加磨砂底 ---------- */
.nav-bar { position: sticky; top: 0; z-index: 20; transition: background .3s, box-shadow .3s; }
.nav-bar.scrolled { background: #ffffffd9; backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px); box-shadow: 0 1px 0 var(--line); }
.nav { min-height: 76px; display: flex; align-items: center; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 650; letter-spacing: -.8px; white-space: nowrap; }
.brand img { width: 28px; height: 31px; }
.links { display: flex; gap: 28px; margin-left: auto; }
.links a { font-size: 15.5px; color: var(--muted); }
.links a:hover { color: var(--ink); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 46px; border: 1px solid #dcdce2; border-radius: 10px; padding: 10px 20px; background: white; color: var(--ink); font-size: 15.5px; font-weight: 580; line-height: 1.4; transition: transform .2s, background .2s, box-shadow .2s; }
.button:hover { transform: translateY(-1px); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #181818; box-shadow: 0 8px 24px -10px #ff5427aa; }
.button.primary:hover { background: #ff693e; box-shadow: 0 12px 30px -10px #ff5427cc; }
.button.big { min-height: 58px; padding: 15px 30px; font-size: 17px; border-radius: 12px; }
.button .arrow { transition: transform .2s; }
.button:hover .arrow { transform: translateX(3px); }

/* ---------- hero ---------- */
.hero { position: relative; text-align: center; padding: 64px 0 72px; }
.hero::before { content: ''; position: absolute; inset: -80px -50vw 0; z-index: -1; background-image: radial-gradient(#d9d9de 1px, transparent 1px); background-size: 22px 22px; -webkit-mask-image: radial-gradient(ellipse 50% 70% at 50% 40%, #000 20%, transparent 75%); mask-image: radial-gradient(ellipse 50% 70% at 50% 40%, #000 20%, transparent 75%); opacity: .7; }
.kicker { display: inline-flex; align-items: center; gap: 10px; margin: 0 0 28px; padding: 6px 16px 6px 8px; border: 1px solid var(--warm-line); border-radius: 999px; background: #fffaf6; font-size: 14.5px; color: #8b482d; }
.kicker b { padding: 2px 9px; border-radius: 999px; background: var(--accent); color: #181818; font-size: 12.5px; font-weight: 650; letter-spacing: .02em; }
.hero h1 { margin: 0 auto; font-size: clamp(44px, 6.6vw, 96px); line-height: 1; letter-spacing: -.05em; font-weight: 640; }
.hero h1 em { position: relative; display: inline-block; font-family: var(--serif); font-weight: 400; letter-spacing: -.03em; color: var(--accent-deep); padding: 0 .06em; }
/* 手绘感下划线：入场时描出 */
.hero h1 em svg { position: absolute; left: 0; right: 0; bottom: -.08em; width: 100%; height: .22em; overflow: visible; }
.hero h1 em path { fill: none; stroke: var(--accent); stroke-width: 5; stroke-linecap: round; stroke-dasharray: 1000; stroke-dashoffset: 1000; animation: draw 1.2s .5s cubic-bezier(.6,0,.2,1) forwards; opacity: .55; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.lede { margin: 32px auto 36px; max-width: 640px; font-size: 20px; line-height: 1.65; color: var(--muted); text-wrap: pretty; }
.lede b { color: var(--ink); font-weight: 620; }
.hero-actions { display: flex; gap: 26px; justify-content: center; align-items: center; flex-wrap: wrap; }
.text-link { display: inline-flex; gap: 10px; align-items: center; min-height: 48px; font-size: 16.5px; border-bottom: 1px solid #20202444; }

/* ---------- stage：深色舞台 + 真实面板 ---------- */
.stage-band { position: relative; background: var(--night); padding: 84px 0 70px; overflow: hidden; color: var(--night-ink); }
.stage-band::before { content: ''; position: absolute; left: 50%; top: -300px; width: 1300px; height: 700px; transform: translateX(-50%); background: radial-gradient(closest-side, #ff542730, transparent); pointer-events: none; }
.stage-band::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(#ffffff06 1px, transparent 1px), linear-gradient(90deg, #ffffff06 1px, transparent 1px); background-size: 56px 56px; -webkit-mask-image: linear-gradient(#000, transparent 70%); mask-image: linear-gradient(#000, transparent 70%); pointer-events: none; }
.tilt { position: relative; z-index: 1; transform: perspective(1800px) rotateX(var(--rx, 0deg)) scale(var(--sc, 1)); transform-origin: 50% 0; will-change: transform; }
.scene { position: relative; max-width: 1140px; height: 640px; margin: auto; }

/* 播放器：通用视频页，抽象画面 */
.pl { position: absolute; left: 0; top: 46px; width: 63%; border-radius: 18px; background: #0b0b0f; border: 1px solid #25252d; overflow: hidden; box-shadow: 0 40px 80px -40px #000; }
.pl-screen { position: relative; aspect-ratio: 16 / 9; overflow: hidden; background: linear-gradient(140deg, #2a1812, #121218 55%, #0e1822); }
.pl-screen::before { content: ''; position: absolute; inset: 0; background: radial-gradient(55% 60% at 28% 35%, #ff6a3a30, transparent), radial-gradient(45% 55% at 76% 42%, #5b8cc430, transparent); }
.person { position: absolute; bottom: 0; width: 23%; aspect-ratio: .8; }
.person::before { content: ''; position: absolute; left: 28%; top: 0; width: 44%; aspect-ratio: 1; border-radius: 50%; background: var(--c); }
.person::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 52%; border-radius: 48% 48% 0 0; background: var(--c); }
.person.a { left: 15%; --c: linear-gradient(#df7a52, #84361b); }
.person.b { left: 58%; width: 21%; --c: linear-gradient(#7d9fc4, #304b68); }
.mic { position: absolute; left: 44%; bottom: 0; width: 3px; height: 30%; background: #4a4a52; }
.mic::before { content: ''; position: absolute; left: -6px; top: -16px; width: 15px; height: 24px; border-radius: 8px; background: #26262c; border: 1px solid #55555d; }
.pl-controls { position: absolute; left: 0; right: 0; bottom: 0; padding: 40px 18px 12px; background: linear-gradient(transparent, #000d); }
.scrub { position: relative; height: 4px; border-radius: 2px; background: #ffffff33; }
.scrub .fill { position: absolute; inset: 0 auto 0 0; width: 9.1%; background: #ff3b1f; border-radius: 2px; transition: width .8s cubic-bezier(.6,0,.2,1); }
.scrub .knob { position: absolute; top: 50%; left: 9.1%; width: 13px; height: 13px; margin: -6.5px 0 0 -6.5px; border-radius: 50%; background: #ff3b1f; transition: left .8s cubic-bezier(.6,0,.2,1); }
.pl-row { display: flex; align-items: center; gap: 14px; margin-top: 10px; font: 13px var(--sans); color: #fff; font-variant-numeric: tabular-nums; }
.pl-row svg { width: 16px; height: 16px; }
.pl-toast { position: absolute; left: 50%; top: 44%; transform: translate(-50%, -50%) scale(.8); display: flex; align-items: center; gap: 10px; padding: 12px 20px; border-radius: 999px; background: #000b; color: #fff; font: 600 18px var(--sans); font-variant-numeric: tabular-nums; opacity: 0; transition: opacity .3s, transform .3s; backdrop-filter: blur(6px); }
.pl-toast.show { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.pl-toast i { width: 10px; height: 10px; border-radius: 50%; background: #ff3b1f; box-shadow: 0 0 0 0 #ff3b1f88; animation: pulse 1.2s infinite; }
@keyframes pulse { 70% { box-shadow: 0 0 0 10px #ff3b1f00; } }
.pl-info { display: flex; gap: 14px; align-items: center; padding: 16px 18px 18px; }
.pl-avatar { width: 38px; height: 38px; border-radius: 50%; background: linear-gradient(135deg, #ff8a5c, #a33a17); flex-shrink: 0; }
.pl-info strong { display: block; font-size: 17px; font-weight: 600; letter-spacing: -.2px; line-height: 1.35; }
.pl-info span { font-size: 13.5px; color: var(--night-muted); }

/* 说明卡：每个阶段一句话 */
.callout { position: absolute; z-index: 4; left: 26px; top: 72px; max-width: 300px; padding: 16px 18px; border-radius: 14px; background: #ffffff14; border: 1px solid #ffffff22; backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); box-shadow: 0 20px 40px -20px #000; transition: opacity .35s, transform .35s; }
.callout.swap { opacity: 0; transform: translateY(8px); }
.callout small { display: block; margin: 0 0 4px; font: 600 12px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: #ff9a76; }
.callout p { margin: 0; font-size: 17px; line-height: 1.45; font-weight: 560; color: #fff; }

/* ---------- 插件面板（与真实界面一致的浅色） ---------- */
.rt { position: relative; display: flex; flex-direction: column; background: var(--rt-bg); color: var(--rt-ink); border-radius: 16px; overflow: hidden; font-size: 14px; line-height: 1.55; text-align: left; }
.scene .rt { position: absolute; right: 0; top: 0; width: 46%; height: 100%; z-index: 3; box-shadow: 0 50px 120px -30px #000, 0 0 0 1px #ffffff1a; }
.rt-head { display: flex; align-items: center; gap: 9px; padding: 14px 18px 4px; font-weight: 650; font-size: 14px; }
.rt-head svg { width: 18px; height: 18px; }
.rt-head .icons { display: flex; gap: 14px; margin-left: auto; color: #6a6a70; }
.rt-head .icons svg { width: 16px; height: 16px; }
.rt-meta { display: grid; grid-template-columns: 18px 1fr; gap: 0 12px; align-items: center; padding: 8px 18px 12px; }
.rt-meta svg { width: 16px; height: 16px; color: #6a6a70; grid-row: span 2; }
.rt-meta b { font-size: 13.5px; font-weight: 560; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rt-meta span { font-size: 12px; color: var(--rt-muted); }
.rt-tabs { position: relative; display: flex; align-items: center; gap: 2px; padding: 0 18px 10px; border-bottom: 1px solid var(--rt-line); }
.rt-tab { position: relative; z-index: 1; border: 0; background: none; padding: 5px 13px; border-radius: 999px; font-size: 13.5px; color: #3b3b40; transition: color .3s; }
.rt-tab.on { color: #fff; font-weight: 560; }
.rt-tab:not(.on):hover { color: var(--rt-hl-ink); }
.rt-ind { position: absolute; z-index: 0; top: 0; height: 31px; border-radius: 999px; background: var(--accent); transition: left .45s cubic-bezier(.6,0,.2,1), width .45s cubic-bezier(.6,0,.2,1); }
.rt-lang { position: relative; margin-left: auto; display: inline-flex; align-items: center; gap: 18px; padding: 4px 10px; border: 1px solid #e1ddd8; border-radius: 7px; background: #fff; font-size: 12.5px; white-space: nowrap; transition: box-shadow .3s; }
.rt-lang.flash { box-shadow: 0 0 0 3px #ff542744; }
.rt-lang svg { width: 12px; height: 12px; }
.rt-tools { display: flex; justify-content: flex-end; align-items: center; gap: 6px; padding: 8px 18px; }
.tool { display: inline-flex; align-items: center; gap: 5px; padding: 4px 10px; border-radius: 7px; font-size: 12.5px; font-weight: 600; background: #fbefe9; }
.tool.off { background: none; color: var(--rt-muted); font-weight: 500; }
.tool svg { width: 13px; height: 13px; }
.rt-tools .search { width: 15px; height: 15px; margin-left: 6px; color: #6a6a70; }
.rt-body { position: relative; flex: 1; overflow: hidden; }
.rt-view { position: absolute; inset: 0; padding: 4px 18px 18px; opacity: 0; transform: translateY(10px); transition: opacity .45s, transform .45s; pointer-events: none; }
.rt-view.on { opacity: 1; transform: none; pointer-events: auto; }
#rows { overflow: hidden; }
.rt-body::after { content: ''; position: absolute; left: 0; right: 0; bottom: 0; height: 50px; background: linear-gradient(transparent, var(--rt-bg)); pointer-events: none; }
.rt-foot { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 9px 18px; border-top: 1px solid var(--rt-line); font-size: 12px; color: var(--rt-muted); white-space: nowrap; }
.rt-foot kbd { padding: 1px 5px; margin-right: 5px; border: 1px solid #ddd; border-radius: 4px; font: 11px var(--sans); }
/* 文字稿行 */
.row { position: relative; display: grid; grid-template-columns: 44px 1fr; gap: 10px; padding: 6px 10px 6px 18px; border-radius: 8px; transition: background .35s; }
.row::before { content: ''; position: absolute; left: 6px; top: 0; bottom: 0; width: 1px; background: var(--rt-line); }
.row::after { content: ''; position: absolute; left: 3px; top: 14px; width: 7px; height: 7px; border-radius: 50%; background: var(--rt-bg); border: 1px solid #d8d4cf; transition: .3s; }
.row.on { background: var(--rt-hl); }
.row.on::after { background: #ff3b1f; border-color: #ff3b1f; }
.ts { border: 0; background: none; padding: 0; text-align: left; font-size: 12.5px; line-height: 1.75; color: var(--rt-muted); text-decoration: underline; text-underline-offset: 3px; font-variant-numeric: tabular-nums; align-self: start; }
.ts:hover { color: var(--rt-hl-ink); }
.tx { font-size: 14px; line-height: 1.6; color: #2a2a2f; transition: color .3s; }
.row.on .ts, .row.on .tx { color: var(--rt-hl-ink); font-weight: 600; }
.zh { grid-column: 2; display: grid; grid-template-rows: 0fr; transition: grid-template-rows .55s cubic-bezier(.6,0,.2,1); }
.zh > div { overflow: hidden; }
.zh p { margin: 0; padding-top: 4px; font-size: 13.5px; line-height: 1.6; color: #77777d; }
.row.on .zh p { color: var(--rt-hl-ink); font-weight: 400; opacity: .85; }
.bi .zh { grid-template-rows: 1fr; }
/* 概览与正文 */
.rt h6 { margin: 10px 0 6px; font-size: 15px; font-weight: 650; }
.rt-view > p, .rt-view .para { margin: 0 0 10px; font-size: 14px; line-height: 1.65; color: #2a2a2f; }
.rt ul { margin: 0; padding-left: 18px; }
.rt li { margin: 0 0 9px; font-size: 14px; line-height: 1.6; color: #3a3a40; }
.rt li b { color: var(--rt-ink); font-weight: 650; }
.chap-label { margin: 10px 0 2px; font-size: 12px; color: var(--rt-muted); }
.chap-label b { color: var(--accent-deep); font-weight: 600; margin-right: 6px; font-variant-numeric: tabular-nums; }
.rt h5 { margin: 0 0 10px; font-size: 17px; font-weight: 650; letter-spacing: -.2px; }
.chapters { display: grid; gap: 6px; }
.chap { display: grid; grid-template-columns: 50px 1fr; gap: 8px; padding: 9px 12px; border: 1px solid var(--rt-line); border-radius: 10px; font-size: 13.5px; background: #fff; }
.chap b { font-weight: 500; color: var(--rt-muted); font-variant-numeric: tabular-nums; }
.chap.on { border-color: #f6b9a4; background: #fff6f2; }
.chap.on b { color: var(--rt-hl-ink); }
.zoom-actions { display: flex; gap: 16px; font-size: 14px !important; font-weight: 600; color: var(--rt-hl-ink) !important; }
.chap em { grid-column: 2; font-style: normal; font-size: 13px; color: #6a6a70; line-height: 1.55; }

/* 舞台下方的阶段进度 */
.steps-bar { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; max-width: 720px; margin: 44px auto 0; }
.seg { border: 0; background: none; padding: 0; text-align: left; color: var(--night-muted); }
.seg i { display: block; height: 3px; border-radius: 2px; background: #ffffff1f; overflow: hidden; }
.seg i::after { content: ''; display: block; height: 100%; width: 0; background: var(--accent); }
.seg.done i::after { width: 100%; }
.seg.on i::after { animation: fill var(--d, 5s) linear forwards; }
.stage-band.paused .seg.on i::after { animation: none; width: 100%; }
@keyframes fill { to { width: 100%; } }
.seg span { display: block; margin-top: 12px; font-size: 15px; font-weight: 560; transition: color .3s; }
.seg small { display: block; font-size: 13.5px; opacity: .8; }
.seg.on span, .seg:hover span { color: #fff; }
.demo-toggle { border: 0; background: none; padding: 0; color: #c9c9d3; text-decoration: underline; text-underline-offset: 3px; font-size: inherit; }
.demo-toggle:hover { color: #fff; }
.stage-note { position: relative; z-index: 1; margin: 30px 0 0; text-align: center; font-size: 14.5px; color: #7d7d89; }
.cursor { position: absolute; z-index: 10; left: 0; top: 0; width: 24px; height: 24px; opacity: 0; pointer-events: none; transition: transform .9s cubic-bezier(.6,0,.2,1), opacity .3s; filter: drop-shadow(0 4px 8px #0006); }
.cursor.show { opacity: 1; }
.cursor.tap::after { content: ''; }
.ripple { position: absolute; z-index: 9; width: 36px; height: 36px; margin: -18px 0 0 -18px; border-radius: 50%; border: 2px solid var(--accent); pointer-events: none; animation: ripple .6s forwards; }
@keyframes ripple { from { transform: scale(.3); opacity: 1; } to { transform: scale(1.6); opacity: 0; } }

/* ---------- sections ---------- */
.section { padding: 120px 0; }
.eyebrow { margin: 0 0 18px; font: 600 13.5px/1.4 var(--mono); letter-spacing: .1em; text-transform: uppercase; color: var(--accent-deep); }
.big-title { margin: 0; font-size: clamp(36px, 4.8vw, 64px); line-height: 1.04; letter-spacing: -.045em; font-weight: 640; }
.big-title em { font-family: var(--serif); font-weight: 400; letter-spacing: -.02em; }
.center { text-align: center; margin-left: auto; margin-right: auto; }

/* 时间对比：听用波形纹理，读用文字行纹理 */
.time-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 90px; align-items: center; }
.time-grid .big-title { font-size: clamp(36px, 4vw, 56px); }
.time-grid p.sub { margin: 26px 0 0; font-size: 18px; color: var(--muted); max-width: 28em; text-wrap: pretty; }
.bars { display: grid; gap: 26px; }
.bars-note { margin: 0 0 -6px; font: 600 13.5px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.bar-row span { display: flex; justify-content: space-between; align-items: baseline; margin: 0 0 9px; font-size: 15.5px; color: var(--muted); }
.bar-row span b { font-size: 26px; font-weight: 650; letter-spacing: -.5px; color: var(--ink); font-variant-numeric: tabular-nums; }
.bar { height: 22px; border-radius: 6px; background: #f3f3f5; overflow: hidden; }
.bar i { display: block; height: 100%; width: 0; border-radius: 6px; transition: width 1.6s cubic-bezier(.25,0,.1,1); }
.bar-row.listen i { background: repeating-linear-gradient(90deg, #c9c9d0 0 3px, transparent 3px 6px); -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 22' preserveAspectRatio='none'%3E%3Cpath d='M0 9h3v4H0zM6 6h3v10H6zM12 3h3v16h-3zM18 7h3v8h-3zM24 1h3v20h-3zM30 5h3v12h-3zM36 8h3v6h-3zM42 2h3v18h-3zM48 6h3v10h-3zM54 4h3v14h-3z'/%3E%3C/svg%3E"); -webkit-mask-size: 60px 100%; mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 60 22' preserveAspectRatio='none'%3E%3Cpath d='M0 9h3v4H0zM6 6h3v10H6zM12 3h3v16h-3zM18 7h3v8h-3zM24 1h3v20h-3zM30 5h3v12h-3zM36 8h3v6h-3zM42 2h3v18h-3zM48 6h3v10h-3zM54 4h3v14h-3z'/%3E%3C/svg%3E"); mask-size: 60px 100%; background: #b9b9c1; }
.bar-row.read i { background: #ffb594; }
.bar-row.hot i { background: var(--accent); }
.bar-row.hot span b { color: var(--accent-deep); }
.bars.in .bar i { width: var(--w); }

/* 滚动叙事 */
/* 深色区块共用氛围：顶部暖光 + 淡出网格。装饰层单独裁切，避免祖先 overflow 破坏 sticky。 */
.story-band { position: relative; background: #0f0f13; color: var(--night-ink); }
.fx { position: absolute; inset: 0; overflow: hidden; pointer-events: none; }
.fx::before { content: ''; position: absolute; left: 50%; top: -320px; width: 1300px; height: 720px; transform: translateX(-50%); background: radial-gradient(closest-side, #ff542730, transparent); }
.fx::after { content: ''; position: absolute; inset: 0; background-image: linear-gradient(#ffffff07 1px, transparent 1px), linear-gradient(90deg, #ffffff07 1px, transparent 1px); background-size: 56px 56px; -webkit-mask-image: linear-gradient(#000, transparent 35%, transparent 70%, #0008); mask-image: linear-gradient(#000, transparent 35%, transparent 70%, #0008); }
.fx .glow-b { position: absolute; left: -260px; bottom: -200px; width: 820px; height: 820px; background: radial-gradient(closest-side, #3d6fd622, transparent); }
.story-band > .wrap { position: relative; }
.story-band .big-title { color: #fff; }
.story-band .eyebrow, .story-band .step .num { color: #ff8a62; }
.story { display: grid; grid-template-columns: .85fr 1.15fr; gap: 80px; }
.steps { padding: 4vh 0 16vh; }
.steps { position: relative; }
/* 左侧时间轴：取自文字稿的时间轴图形，当前一幕的节点亮起 */
.steps::before { content: ''; position: absolute; left: -36px; top: 18vh; bottom: 28vh; width: 1px; background: linear-gradient(transparent, #ffffff26 12%, #ffffff26 88%, transparent); }
.step { position: relative; min-height: 74vh; display: flex; flex-direction: column; justify-content: center; opacity: .35; transition: opacity .5s; }
.step::before { content: ''; position: absolute; left: -41px; top: 50%; width: 11px; height: 11px; margin-top: -5.5px; border-radius: 50%; background: #0f0f13; border: 1.5px solid #ffffff40; transition: .4s; }
.step.on::before { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 0 6px #ff542733, 0 0 24px #ff5427aa; }
.step.on { opacity: 1; }
.step .num { display: inline-flex; align-items: center; gap: 10px; font: 600 13.5px var(--mono); color: var(--accent-deep); letter-spacing: .1em; }
.step .num::before { content: ''; width: 28px; height: 1.5px; background: currentColor; }
.step h3 { color: #fff; margin: 14px 0 16px; font-size: clamp(30px, 3.3vw, 46px); line-height: 1.08; letter-spacing: -.04em; font-weight: 640; }
.step h3 em { font-family: var(--serif); font-weight: 400; }
.step > p { margin: 0; font-size: 18.5px; line-height: 1.7; color: #a6a6b2; max-width: 26em; text-wrap: pretty; }
.step-media { display: none; }
.story-dots { display: none; justify-content: center; align-items: center; gap: 4px; padding: 18px 0 84px; }
.story-dots button { width: 28px; height: 28px; border: 0; padding: 0; background: none; display: grid; place-items: center; }
.story-dots button::after { content: ''; width: 8px; height: 8px; border-radius: 4px; background: #ffffff38; transition: width .3s, background .3s; }
.story-dots button[aria-current="true"]::after { width: 24px; background: var(--accent); }
.sticky { position: sticky; top: 10vh; height: 80vh; display: flex; align-items: center; }
.frame { position: relative; width: 100%; height: min(600px, 100%); --g: #ff5427; }
/* 光晕要比面板大一圈才能从四周透出来 */
.frame::before { content: ''; position: absolute; inset: -35% -25% -35% -55%; background: radial-gradient(closest-side, color-mix(in srgb, var(--g) 28%, transparent), transparent); transition: background .8s; pointer-events: none; }
.shot { position: absolute; inset: 0; opacity: 0; transform: translateY(24px) scale(.98); transition: opacity .6s, transform .6s; pointer-events: none; }
.shot.on { opacity: 1; transform: none; }
.shot .rt-ind { display: none; }
.shot .rt-tab.on { background: var(--accent); }
.shot .rt { position: absolute; right: 0; top: 0; bottom: 0; width: 84%; box-shadow: 0 50px 120px -30px #000, 0 0 0 1px #ffffff1a; }
/* 放大卡片：压在面板左缘，橙色描边 */
.zoom { position: absolute; z-index: 2; left: 0; width: 56%; padding: 18px 20px; border-radius: 14px; background: #fff; border: 2px solid var(--accent); box-shadow: 0 30px 70px -20px #000c; transform: translateX(-16px) rotate(-1.2deg); transition: transform .7s .15s; text-align: left; }
.shot:not(.on) .zoom { transform: translateX(-40px) rotate(-3deg); }
.zoom small { display: block; margin: 0 0 6px; font: 600 11.5px var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--accent-deep); }
.zoom p { margin: 0; font-size: 16px; line-height: 1.55; color: #2a2a2f; }
.zoom p + p { margin-top: 6px; color: #77777d; font-size: 15px; }
.zoom .big { font-size: 34px; font-weight: 650; letter-spacing: -.04em; line-height: 1.1; color: var(--ink); }
.play-pill { display: flex; align-items: center; gap: 10px; margin: 12px 0 0; padding: 8px 12px; border-radius: 10px; background: var(--rt-hl); color: var(--rt-hl-ink); font-size: 14.5px; font-weight: 650; }
.play-pill .play { width: 24px; height: 24px; border-radius: 50%; background: var(--accent); display: grid; place-items: center; flex-shrink: 0; }
.play-pill .mini-wave { flex: 1; height: 18px; margin: 0; }
.zoom .zoom-actions { margin-top: 10px; }
.frags { display: grid; gap: 2px; font: 13.5px/1.6 var(--mono); color: #8a8a90; }
.frags b { display: inline-block; width: 50px; font-weight: 400; color: #b5b5bb; }
.becomes { margin: 6px 0 4px; font-size: 18px; color: var(--accent); }
.flow { list-style: none; margin: 4px 0 0; padding: 0; display: grid; gap: 10px; counter-reset: f; }
.flow li { position: relative; padding-left: 32px; font-size: 15.5px; line-height: 1.45; color: #55555c; counter-increment: f; }
.flow li::before { content: counter(f); position: absolute; left: 0; top: -1px; width: 22px; height: 22px; border-radius: 50%; display: grid; place-items: center; background: #f1ece7; color: #8a8a90; font-size: 12px; font-weight: 650; }
.flow li.now { color: var(--rt-hl-ink); font-weight: 650; }
.flow li.now::before { content: '✓'; background: var(--accent); color: #fff; }
.zoom .hl-row { display: grid; grid-template-columns: 46px 1fr; gap: 10px; padding: 10px 12px; border-radius: 9px; background: var(--rt-hl); color: var(--rt-hl-ink); font-weight: 600; font-size: 15.5px; line-height: 1.5; }
.zoom .hl-row u { text-underline-offset: 3px; font-weight: 600; font-size: 13.5px; }
.zoom .src { display: flex; align-items: center; gap: 8px; margin: 0 0 8px; font-size: 13px; color: var(--rt-muted); }
.zoom .src img { width: 16px; height: 16px; }
.mini-wave { display: flex; align-items: center; gap: 3px; height: 26px; margin-top: 10px; }
.mini-wave span { flex: 1; height: 100%; border-radius: 2px; background: var(--accent); transform: scaleY(.3); animation: bar 1s ease-in-out infinite; animation-delay: calc(var(--i) * -71ms); }
@keyframes bar { 50% { transform: scaleY(var(--h)); } }

/* 平台与能力 */
.platforms { display: flex; flex-wrap: wrap; justify-content: center; gap: 12px; margin: 44px 0 0; }
.platform { display: inline-flex; align-items: center; gap: 12px; padding: 13px 22px 13px 16px; border: 1px solid var(--line); border-radius: 14px; font-size: 17px; font-weight: 560; background: #fff; transition: transform .2s, box-shadow .2s; }
.platform:hover { transform: translateY(-2px); box-shadow: 0 12px 30px -18px #0004; }
.platform img { width: 28px; height: 28px; }
.platform img.app { border-radius: 7px; }
.platform .zh { font-weight: 400; color: var(--muted); }
.soon { margin: 18px 0 0; text-align: center; color: var(--muted); font-size: 16px; }
.langs { max-width: 980px; margin: 24px auto 0; padding: 26px 30px; border-radius: 18px; background: #fcfcfd; border: 1px solid var(--line); display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.langs p { margin: 0; font-size: 17px; color: var(--muted); }
.langs p b { color: var(--ink); font-weight: 620; }
.langs ul { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; padding: 0; list-style: none; }
.langs li { padding: 5px 12px; background: #fff; border: 1px solid var(--line); border-radius: 999px; font-size: 15px; transition: border-color .2s, color .2s; }
.langs li:hover { border-color: var(--accent); color: var(--accent-deep); }
.audience { display: grid; grid-template-columns: repeat(4, 1fr); margin: 90px 0 0; border-top: 1px solid var(--line); }
.audience div { padding: 28px 26px 0 0; }
.audience div + div { padding-left: 26px; border-left: 1px solid var(--line); }
.audience h3 { margin: 0 0 8px; font: italic 400 29px/1.2 var(--serif); letter-spacing: -.5px; }
.audience p { margin: 0; font-size: 16px; color: var(--muted); line-height: 1.65; }

/* 价格 */
.pricing-status { margin: 18px auto 48px; text-align: center; color: var(--muted); }
.pricing-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; max-width: 980px; margin: auto; align-items: stretch; }
.plan { position: relative; padding: 38px; border: 1px solid #e3e3e8; border-radius: 22px; background: #fff; }
.plan.pro { background: var(--night); border-color: var(--night); color: var(--night-ink); overflow: hidden; }
.plan.pro::before { content: ''; position: absolute; right: -120px; top: -160px; width: 380px; height: 380px; background: radial-gradient(closest-side, #ff542744, transparent); pointer-events: none; }
.plan.pro .plan-intro, .plan.pro .price span, .plan.pro .plan-terms { color: var(--night-muted); }
.plan.pro .benefits { border-color: var(--night-line); }
.plan-badge { position: absolute; top: 24px; right: 24px; margin: 0; padding: 4px 12px; border-radius: 999px; background: var(--accent); color: #181818; font-size: 13.5px; font-weight: 650; }
.plan h3 { margin: 0 0 6px; font-size: 25px; font-weight: 640; letter-spacing: -.6px; }
.plan-intro { margin: 0; color: var(--muted); }
.price { position: relative; margin: 26px 0; font-size: 62px; font-weight: 650; letter-spacing: -.045em; line-height: 1.05; }
.price span { font-size: 16.5px; font-weight: 400; letter-spacing: 0; color: var(--muted); }
.plan .button { position: relative; width: 100%; }
.plan-terms { position: relative; margin: 16px 0 0; font-size: 15.5px; line-height: 1.65; }
.plan-terms a, .faq-answer a, .more-link { text-decoration: underline; text-underline-offset: 3px; }
.benefits { position: relative; list-style: none; margin: 26px 0 0; padding: 24px 0 0; border-top: 1px solid var(--line); }
.benefits li { position: relative; padding-left: 30px; margin: 0 0 14px; font-size: 16.5px; line-height: 1.6; }
.benefits li::before { content: ''; position: absolute; left: 2px; top: 7px; width: 13px; height: 7px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent); transform: rotate(-45deg); }
.more-link { display: block; margin: 32px 0 0; text-align: center; font-size: 16.5px; }

/* FAQ */
.faq { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; border-top: 1px solid var(--line); }
.faq h2 { margin: 0; font-size: 44px; letter-spacing: -.04em; line-height: 1.1; font-weight: 640; }
.faq h2 + p { margin: 18px 0 0; color: var(--muted); }
details { border-bottom: 1px solid var(--line); }
details:first-child { border-top: 1px solid var(--line); }
summary { position: relative; padding: 22px 40px 22px 0; font-size: 18px; font-weight: 560; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { content: ''; position: absolute; right: 6px; top: 31px; width: 9px; height: 9px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(45deg); transition: transform .25s; }
details[open] summary::after { transform: rotate(-135deg); top: 35px; }
.faq-answer p { margin: 0 0 22px; color: var(--muted); line-height: 1.85; }

/* 结尾 CTA */
.final { position: relative; background: var(--night); color: var(--night-ink); text-align: center; padding: 140px 0 150px; overflow: hidden; }
.final::before { content: ''; position: absolute; left: 50%; bottom: -340px; width: 1100px; height: 640px; transform: translateX(-50%); background: radial-gradient(closest-side, #ff542738, transparent); }
.final::after { content: ''; position: absolute; inset: 0; background: radial-gradient(500px 400px at 88% 10%, #3d6fd61f, transparent), linear-gradient(#ffffff07 1px, transparent 1px) 0 0 / 56px 56px, linear-gradient(90deg, #ffffff07 1px, transparent 1px) 0 0 / 56px 56px; -webkit-mask-image: linear-gradient(transparent, #000 60%); mask-image: linear-gradient(transparent, #000 60%); pointer-events: none; }
/* 背景滚动的文字稿行，暗示"长对话" */
.final .ticker { position: absolute; inset: 0; display: grid; align-content: center; gap: 18px; opacity: .05; pointer-events: none; -webkit-mask-image: linear-gradient(90deg, transparent, #000 20%, #000 80%, transparent); mask-image: linear-gradient(90deg, transparent, #000 20%, #000 80%, transparent); }
.final .ticker div { white-space: nowrap; font: 500 28px var(--sans); animation: slide 60s linear infinite; }
.final .ticker div:nth-child(2) { animation-duration: 80s; animation-direction: reverse; }
.final .ticker div:nth-child(3) { animation-duration: 70s; }
@keyframes slide { to { transform: translateX(-50%); } }
.final h2 { position: relative; margin: 0 0 22px; font-size: clamp(46px, 6.4vw, 92px); line-height: 1; letter-spacing: -.05em; font-weight: 640; }
.final h2 em { font-family: var(--serif); font-weight: 400; color: #ff8a62; }
.final p { position: relative; margin: 0 auto 40px; max-width: 34em; font-size: 19px; color: var(--night-muted); }

footer { display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; padding: 36px 0; color: var(--muted); font-size: 15.5px; }
footer nav { display: flex; gap: 26px; flex-wrap: wrap; }
footer a:hover { color: var(--ink); }
dialog { border: 1px solid var(--line); border-radius: 16px; padding: 38px; width: min(460px, calc(100% - 32px)); color: var(--ink); }
dialog::backdrop { background: #20202466; backdrop-filter: blur(3px); }
dialog h2 { margin: 6px 0 18px; font-size: 28px; letter-spacing: -.7px; line-height: 1.2; }
dialog p { color: var(--muted); margin: 0 0 24px; }

.reveal { opacity: 0; transform: translateY(28px); transition: opacity .9s, transform .9s cubic-bezier(.2,0,.1,1); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .wrap { padding: 0 32px; }
  .scene { height: 600px; }
  .pl { width: 60%; }
  .scene .rt { width: 52%; }
  .callout { max-width: 250px; }
  .time-grid { grid-template-columns: 1fr; gap: 56px; }
  .story { grid-template-columns: 1fr; gap: 0; }
  .story .sticky { display: none; }
  .story { --gutter: 32px; }
  .steps { display: flex; align-items: stretch; gap: 16px; margin: 0 calc(-1 * var(--gutter)); padding: 36px var(--gutter) 8px; overflow-x: auto; overscroll-behavior-x: contain; scroll-snap-type: x mandatory; scroll-padding: 0 var(--gutter); scrollbar-width: none; }
  .steps::-webkit-scrollbar { display: none; }
  .step { flex: 0 0 min(86%, 560px); min-height: 0; opacity: 1; padding: 0; justify-content: flex-start; scroll-snap-align: start; }
  .steps::before, .step::before { display: none; }
  .step h3 { font-size: clamp(26px, 6.4vw, 36px); }
  .step > p { font-size: 17px; }
  .step > p { margin-bottom: 26px; }
  .step-media { display: block; position: relative; height: 520px; margin: auto 0 0; }
  .story-dots { display: flex; }
  .step-media .shot { opacity: 1; transform: none; }
  .step-media .zoom { transform: translateX(-8px) rotate(-1.2deg); }
  .audience { grid-template-columns: 1fr 1fr; row-gap: 30px; }
  .audience div:nth-child(3) { padding-left: 0; border-left: 0; }
  .faq { grid-template-columns: 1fr; gap: 30px; }
}
@media (max-width: 860px) {
  .links { display: none; }
  .nav .button { margin-left: auto; }
  .scene { height: auto; }
  .pl { position: relative; top: 0; width: 100%; }
  .pl-info { display: none; }
  .scene .rt { position: relative; width: 100%; height: 540px; margin-top: 14px; }
  .callout { display: none; }
}
@media (max-width: 600px) {
  .wrap { padding: 0 16px; }
  .nav { min-height: 64px; }
  .nav .button { min-height: 40px; padding: 7px 14px; font-size: 15px; }
  .hero { padding: 36px 0 48px; }
  .kicker { font-size: 13px; }
  .kicker .wide-only { display: none; }
  .lede { font-size: 17.5px; margin: 26px auto 30px; }
  .stage-band { padding: 40px 0 44px; }
  .scene .rt { height: 500px; margin-top: 12px; }
  .rt-tab { padding: 5px 10px; }
  .rt-lang { gap: 6px; padding: 4px 8px; }
  .rt-ind { height: 31px; }
  .rt-head, .rt-meta, .rt-tabs, .rt-tools, .rt-foot { padding-left: 14px; padding-right: 14px; }
  .rt-view { padding: 4px 12px 14px; }
  .rt-foot .esc { display: none; }
  .steps-bar { gap: 8px; margin-top: 26px; }
  .seg span { font-size: 13px; }
  .seg small { display: none; }
  .section { padding: 80px 0; }
  .story { --gutter: 16px; }
  .step-media { height: 500px; }
  .shot .rt { width: 100%; }
  /* 窄屏上放大卡片会挡住面板，直接隐藏 */
  .zoom { display: none; }
  .bar-row span b { font-size: 22px; }
  .audience { grid-template-columns: 1fr; }
  .audience div, .audience div + div { padding: 22px 0; border-left: 0; border-bottom: 1px solid var(--line); }
  .pricing-grid { grid-template-columns: 1fr; }
  .plan { padding: 28px; }
  .faq h2 { font-size: 36px; }
  .final { padding: 96px 0 104px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .hero h1 em path { stroke-dashoffset: 0; }
  .reveal { opacity: 1; transform: none; }
  .tilt { transform: none; }
}
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 30; background: #fff; padding: 10px 20px; border: 1px solid var(--line); border-radius: 8px; }
.skip-link:focus { top: 16px; }
footer .copy { flex-basis: 100%; margin: 0; font-size: 14.5px; }