/* KeepScribe 官网。颜色、圆角和 App 一致（docs/design-system.md）；只用系统字体、不引任何外部资源，国内访问不受影响
   版式：首页借 App 逐字稿页的语言——说话人圆点、等宽时间码、正在播放那句的浅蓝底、标黄、红色标记；
   首屏是一份开着飞行模式的逐字稿，下面一张图说明录音从头到尾都在这台 iPhone 上 */
:root {
  --bg: #F5F4F0;
  --surface: #FFFFFF;
  --ink: #17212F;
  --ink2: #4A5566;
  --ink3: #646B77;
  --line: #E3E1DA;
  --fill: #EAE8E2;
  --accent: #24476B;
  --accent-soft: #E3EAF2;
  --record: #C8392B;
  --mark: #FFF3B0;
  --mark-ink: #5A4A10;
  --sp1: #2F5F97;
  --sp2: #A8531A;
  --spec-bg: #FFFFFF;
  --spec-player: #F5F4F0;
  --shadow: rgba(23, 33, 47, .18);
  /* 结尾那块用录音页的深色，两种外观下都是深色 */
  --night: #111821;
  --night-ink: #F2F1EC;
  --night-ink2: #B7C0CC;
  --night-line: #2A3542;
  --night-record: #EF5A4A;

  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --radius: 22px;
  --max: 1120px;
  --gutter: 24px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111821;
    --surface: #1D2733;
    --ink: #F2F1EC;
    --ink2: #B7C0CC;
    --ink3: #8D96A2;
    --line: #2A3542;
    --fill: #26313D;
    --accent: #8FB0D6;
    --accent-soft: #1E2C3C;
    --record: #EF5A4A;
    --mark: #5A4A10;
    --mark-ink: #FFF3B0;
    --sp1: #6F9BD1;
    --sp2: #E0955A;
    --spec-bg: #111821;
    --spec-player: #1D2733;
    --shadow: rgba(0, 0, 0, .55);
    --night: #0A0F15;
    --night-line: #26313D;
  }
}

/* 基础 */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3 { margin: 0; text-wrap: balance; }
p, ul, ol, figure { margin: 0; }
a { color: var(--accent); text-decoration: none; text-underline-offset: .22em; text-decoration-thickness: 1px; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
img { max-width: 100%; height: auto; display: block; }
time { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.wrap { max-width: var(--max); margin-inline: auto; padding-inline: var(--gutter); }
.skip { position: absolute; left: 12px; top: -60px; z-index: 20; background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 10px; }
.skip:focus { top: 12px; text-decoration: none; }

/* 顶栏 */
.top {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 84%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(16px);
  backdrop-filter: saturate(1.4) blur(16px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 700; font-size: 18px; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 32px; height: 32px; border-radius: 8px; }
.nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 4px 22px; font-size: 15px; }
.nav a { color: var(--ink2); }
.nav a:hover { color: var(--ink); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }

/* 按钮。还没上架：「即将登陆」是个不能点的标签，上架后换成 App Store 徽标 */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  min-height: 52px; padding-inline: 24px; border-radius: 999px;
  background: var(--ink); color: var(--bg); font-weight: 600; font-size: 17px; line-height: 1.2;
}
.button:hover { text-decoration: none; opacity: .9; }
.button.soon { background: var(--fill); color: var(--ink2); cursor: default; }
.button.soon:hover { opacity: 1; }
.button.soon::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--record); }

/* 小标签：「买断」 */
.tag {
  display: inline-block; vertical-align: .18em; margin-left: 8px;
  font-size: 12px; font-weight: 600; line-height: 1; letter-spacing: .02em;
  padding: 4px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent);
}

/* 每一节 */
.band { padding-block: 96px 0; }
.head { max-width: 720px; }
.kicker { font-size: 14px; font-weight: 600; color: var(--accent); letter-spacing: .04em; margin-bottom: 12px; }
.band h2 { font-size: clamp(28px, 3.4vw, 38px); line-height: 1.25; letter-spacing: -.015em; font-weight: 700; }
.sub { margin-top: 16px; font-size: 18px; color: var(--ink2); max-width: 40em; }
.ticks { list-style: none; padding: 0; display: grid; gap: 12px; margin-top: 26px; }
.ticks li { position: relative; padding-left: 28px; color: var(--ink2); }
.ticks li::before {
  content: ""; position: absolute; left: 3px; top: .5em;
  width: 11px; height: 6px; border-left: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

/* 首屏 */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 420px); gap: 64px; align-items: center; padding-block: 56px 24px; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 600; color: var(--sp1); }
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: currentColor; }
.hero h1 { font-size: clamp(40px, 5.6vw, 64px); line-height: 1.16; letter-spacing: -.025em; font-weight: 700; margin-block: 18px 24px; }
/* 标题第二行像逐字稿里正在播放的那句 */
.hero h1 .now { background: var(--accent-soft); border-radius: 10px; padding-inline: .1em; margin-inline: -.1em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.lead { font-size: 19px; line-height: 1.75; color: var(--ink2); max-width: 31em; }
.cta { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 18px; margin-top: 32px; }
.cta .note { font-size: 14px; color: var(--ink3); }
.lang-note { margin-top: 14px; font-size: 15px; color: var(--ink3); max-width: 32em; }
.facts { list-style: none; padding: 22px 0 0; margin-top: 36px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px 28px; font-size: 15px; font-weight: 500; color: var(--ink2); }
.facts li { display: inline-flex; align-items: center; gap: 9px; }
.facts li::before { content: ""; width: 6px; height: 6px; border-radius: 2px; background: var(--accent); }

/* 首屏右边：一份开着飞行模式的逐字稿（照 App 的逐字稿页画的） */
.spec-wrap { justify-self: end; width: 100%; max-width: 400px; }
.spec {
  background: var(--spec-bg); color: var(--ink);
  border: 1px solid var(--line); border-radius: 46px;
  box-shadow: 0 50px 90px -50px var(--shadow), 0 2px 6px -2px var(--shadow);
  padding: 16px 20px 18px; overflow: hidden;
  font-size: 16px; line-height: 1.6;
}
.spec-wrap figcaption { margin-top: 16px; font-size: 14px; color: var(--ink3); text-align: center; }
.status { display: flex; justify-content: space-between; align-items: center; padding: 2px 12px 8px; font-size: 15px; font-weight: 600; font-variant-numeric: tabular-nums; }
.status-icons { display: inline-flex; align-items: center; gap: 7px; }
.status svg { display: block; fill: currentColor; }
.spec-title { margin-top: 12px; font-size: 21px; font-weight: 700; line-height: 1.35; }
.spec-meta { margin-top: 2px; font-size: 13px; color: var(--ink3); font-variant-numeric: tabular-nums; }
.tabs { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 14px; padding: 4px; border-radius: 999px; background: var(--fill); font-size: 14px; text-align: center; color: var(--ink2); line-height: 1.9; }
.tabs span { border-radius: 999px; }
.tabs .on { background: var(--spec-bg); color: var(--ink); font-weight: 600; box-shadow: 0 1px 3px var(--shadow); }
.chip { display: inline-flex; align-items: center; gap: 6px; margin-top: 14px; padding: 3px 10px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); font-size: 12px; font-weight: 500; line-height: 1.6; }
.chip svg { fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.para { margin-top: 14px; }
.who { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; line-height: 1.5; }
.who::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
.who.a { color: var(--sp1); }
.who.b { color: var(--sp2); }
.who time { font-size: 12.5px; font-weight: 400; color: var(--ink3); }
.para .text { margin-top: 2px; }
/* 英文页：中文界面下面的灰色英文翻译 */
.gloss { display: block; margin-top: 3px; font-size: 13px; font-weight: 400; line-height: 1.5; color: var(--ink3); }
.spec-title .gloss { margin-top: 1px; font-size: 13.5px; }
.gloss-inline { font-size: 12.5px; font-weight: 400; color: var(--ink3); }
.marker .gloss-inline { color: var(--record); opacity: .75; }
.shot figcaption { margin-top: 18px; font-size: 13.5px; line-height: 1.7; color: var(--ink3); text-align: center; }
.shot figcaption span { color: var(--ink2); font-weight: 600; }
.s { border-radius: 5px; padding: 1px 3px; margin-inline: -3px; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.s.hl { background: var(--mark); }
.marker { display: flex; align-items: center; gap: 7px; margin-top: 14px; font-size: 13px; font-weight: 600; color: var(--record); line-height: 1.4; }
.marker svg { fill: currentColor; }
.marker::after { content: ""; flex: 1; height: 1px; background: currentColor; opacity: .35; }
.player { margin-top: 18px; padding: 16px 16px 12px; border-radius: 28px; background: var(--spec-player); border: 1px solid var(--line); overflow: hidden; }
.wave { position: relative; display: flex; align-items: center; gap: 2px; height: 34px; }
.wave i { flex: 1; min-height: 3px; height: calc(var(--h) * 100%); border-radius: 1px; background: var(--ink3); opacity: .38; }
.wave .flag { position: absolute; top: -7px; bottom: -2px; left: 43.2%; width: 1px; background: var(--record); }
.wave .flag::before { content: ""; position: absolute; left: 0; top: 0; width: 8px; height: 6px; background: var(--record); clip-path: polygon(0 0, 100% 0, 70% 50%, 100% 100%, 0 100%); }
.wave .head { position: absolute; inset: -5px 0 -5px 0; transform: translateX(43.2%); }
.wave .head::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; border-radius: 1px; background: var(--record); }
.times { display: flex; justify-content: space-between; margin-top: 6px; font-size: 11.5px; color: var(--ink3); }
.controls { display: flex; align-items: center; justify-content: space-between; margin-top: 6px; }
.speed { font: 600 13px var(--mono); color: var(--accent); background: var(--accent-soft); padding: 5px 12px; border-radius: 999px; }
.pause { width: 48px; height: 48px; border-radius: 50%; background: var(--ink); display: grid; place-items: center; }
.pause svg { fill: var(--spec-bg); }
.flagbtn { position: relative; width: 44px; display: grid; place-items: center; color: var(--ink); }
.flagbtn svg { fill: currentColor; }
.flagbtn b { position: absolute; top: -6px; right: 4px; min-width: 16px; height: 16px; border-radius: 8px; background: var(--record); color: #FFFFFF; font-size: 10.5px; line-height: 16px; text-align: center; font-weight: 700; }

/* 动起来：按 2 倍速「播放」这段 37 秒的录音，播放头走一遍，浅蓝底跟着换到正在播的那句（标黄的那句保持黄色，和 App 一样） */
@media (prefers-reduced-motion: no-preference) {
  .wave .head { animation: playhead 18.5s linear infinite; }
  .s1 { animation: s1 18.5s infinite; }
  .s2 { animation: s2 18.5s infinite; }
  .s3 { animation: s3 18.5s infinite; }
  .s4 { animation: s4 18.5s infinite; }
}
@media (prefers-reduced-motion: reduce) { .s3 { background: var(--accent-soft); } }
@keyframes playhead { from { transform: translateX(0); } to { transform: translateX(100%); } }
@keyframes s1 { 0%, 18.9% { background-color: var(--accent-soft); } 19%, 100% { background-color: transparent; } }
@keyframes s2 { 0%, 18.9% { background-color: transparent; } 19%, 43.2% { background-color: var(--accent-soft); } 43.3%, 100% { background-color: transparent; } }
@keyframes s3 { 0%, 43.2% { background-color: transparent; } 43.3%, 59.4% { background-color: var(--accent-soft); } 59.5%, 100% { background-color: transparent; } }
@keyframes s4 { 0%, 59.4% { background-color: transparent; } 59.5%, 75.6% { background-color: var(--accent-soft); } 75.7%, 100% { background-color: transparent; } }

/* 录音去了哪里：虚线框是这台 iPhone，四步都在框里；框外的服务器划掉 */
.flow { display: grid; grid-template-columns: minmax(0, 1fr) 72px minmax(0, 210px); align-items: center; margin-top: 48px; }
.device { position: relative; border: 1.5px dashed var(--ink3); border-radius: 30px; padding: 40px 28px 30px; }
.device-label { position: absolute; top: -13px; left: 24px; padding-inline: 10px; background: var(--bg); font-size: 15px; font-weight: 700; line-height: 24px; }
.steps { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; counter-reset: step; }
.steps li { position: relative; display: grid; align-content: start; gap: 8px; }
.steps li::before {
  counter-increment: step; content: counter(step);
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  font: 600 14px var(--mono); background: var(--accent-soft); color: var(--accent);
}
.steps li:first-child::before { background: var(--record); color: #FFFFFF; }
.steps li:not(:last-child)::after { content: ""; position: absolute; top: 15px; left: 42px; right: -12px; height: 1px; background: var(--line); }
.steps b { font-size: 19px; line-height: 1.4; }
.steps span { font-size: 15px; line-height: 1.6; color: var(--ink2); }
.cut { position: relative; height: 2px; background: repeating-linear-gradient(90deg, var(--ink3) 0 6px, transparent 6px 12px); opacity: .7; }
.cut::after { content: ""; position: absolute; left: 50%; top: 50%; width: 3px; height: 34px; border-radius: 2px; background: var(--record); transform: translate(-50%, -50%) rotate(35deg); }
.cloud { border: 1.5px dashed var(--line); border-radius: 22px; padding: 20px 22px; }
.cloud b { display: block; font-size: 19px; color: var(--ink3); text-decoration: line-through; text-decoration-color: var(--record); text-decoration-thickness: 2px; }
.cloud span { display: block; margin-top: 4px; font-size: 15px; line-height: 1.6; color: var(--ink2); }
.flow-note { margin-top: 26px; font-size: 15px; color: var(--ink3); max-width: 46em; }

/* 一边截图、一边文字 */
.split { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); gap: 80px; align-items: center; }
.split.rev { grid-template-columns: minmax(0, 1fr) minmax(0, 460px); }
.shot { justify-self: center; width: 100%; max-width: 300px; }
.shot img { width: 100%; border-radius: 42px; border: 1px solid var(--line); box-shadow: 0 50px 90px -50px var(--shadow); }

/* 逐字稿的六件事 */
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px 44px; margin-top: 44px; }
.grid3 > div { border-top: 1px solid var(--line); padding-top: 20px; }
.grid3 h3 { font-size: 19px; line-height: 1.4; }
.grid3 p { margin-top: 8px; font-size: 16px; color: var(--ink2); }

/* 职业纪要 */
.roles { margin-top: 44px; border-top: 1px solid var(--ink); }
.role { display: grid; grid-template-columns: minmax(0, 170px) minmax(0, 230px) minmax(0, 1fr); gap: 6px 28px; align-items: baseline; padding-block: 22px; border-bottom: 1px solid var(--line); }
.role .r { font-size: 20px; font-weight: 700; line-height: 1.4; }
.role .t { font-weight: 600; color: var(--accent); }
.role .t small { display: block; font-size: 13px; font-weight: 500; color: var(--ink3); }
.role .f { font-size: 16px; color: var(--ink2); }
.aside { margin-top: 22px; font-size: 15px; color: var(--ink3); max-width: 46em; }

/* 导出的文件 */
.files { display: grid; gap: 30px; }
.files-label { font-size: 14px; font-weight: 600; color: var(--ink3); margin-bottom: 14px; }
.files-row { display: flex; flex-wrap: wrap; gap: 18px 14px; }
.file { width: 76px; display: grid; justify-items: center; gap: 10px; text-align: center; font-size: 13.5px; line-height: 1.3; color: var(--ink2); }
.file i {
  position: relative; width: 60px; height: 76px; display: grid; place-items: end center; padding-bottom: 12px;
  background: var(--surface); border-radius: 8px;
  clip-path: polygon(0 0, 70% 0, 100% 23%, 100% 100%, 0 100%);
  font: 700 11.5px var(--mono); font-style: normal; color: var(--ink); letter-spacing: .02em;
}
.file i::after { content: ""; position: absolute; top: 0; right: 0; width: 30%; height: 23%; background: var(--line); clip-path: polygon(0 0, 100% 100%, 0 100%); }
.file.pro i { color: var(--accent); }

/* 价格 */
.plans { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 44px; }
.plan { border-radius: var(--radius); padding: 30px 30px 32px; background: var(--surface); border: 1px solid var(--line); }
.plan h3 { font-size: 24px; line-height: 1.3; }
.plan-sub { margin-top: 6px; font-size: 15px; color: var(--ink3); }
.plan .ticks { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--line); }
.plan.pro { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.plan.pro .plan-sub { color: var(--bg); opacity: .7; }
.plan.pro .ticks { border-top-color: color-mix(in srgb, var(--bg) 22%, transparent); }
.plan.pro .ticks li { color: var(--bg); opacity: .9; }
.plan.pro .ticks li::before { border-color: var(--bg); }
.price-note { margin-top: 18px; font-size: 15px; color: var(--ink3); max-width: 46em; }

/* 常见问题（首页和技术支持页共用） */
details { border-bottom: 1px solid var(--line); }
summary { position: relative; list-style: none; cursor: pointer; padding: 18px 44px 18px 0; font-weight: 600; color: var(--ink); line-height: 1.55; }
summary::-webkit-details-marker { display: none; }
summary::after {
  content: ""; position: absolute; right: 8px; top: 50%; width: 9px; height: 9px;
  border-right: 2px solid var(--ink3); border-bottom: 2px solid var(--ink3);
  transform: translateY(-70%) rotate(45deg); transition: transform .2s;
}
details[open] summary::after { transform: translateY(-25%) rotate(-135deg); }
details > p { padding-bottom: 18px; color: var(--ink2); }
details > p + p { margin-top: -8px; }
.faq { max-width: 820px; margin-top: 36px; border-top: 1px solid var(--line); }
.more { margin-top: 24px; font-weight: 600; }

/* 结尾：录音页的深色和红色录音键 */
.closing {
  margin-top: 112px; padding: 56px; border-radius: 36px;
  background: var(--night); color: var(--night-ink); border: 1px solid var(--night-line);
  display: grid; grid-template-columns: auto minmax(0, 1fr) auto; gap: 36px; align-items: center;
}
.rec { width: 76px; height: 76px; border-radius: 50%; border: 3px solid var(--night-ink); display: grid; place-items: center; }
.rec::before { content: ""; width: 58px; height: 58px; border-radius: 50%; background: var(--night-record); }
.closing h2 { font-size: clamp(24px, 2.8vw, 32px); line-height: 1.3; letter-spacing: -.01em; }
.closing p { margin-top: 8px; color: var(--night-ink2); }
.closing .button.soon { background: var(--night-ink); color: var(--night); }
.closing .button.soon::before { background: var(--night-record); }

/* 页脚 */
.foot { margin-top: 96px; border-top: 1px solid var(--line); padding-block: 36px 48px; font-size: 14px; color: var(--ink3); }
.foot-in { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 22px 32px; align-items: center; }
.foot-brand { display: flex; align-items: center; gap: 12px; }
.foot-brand img { width: 30px; height: 30px; border-radius: 7px; }
.foot-brand b { display: block; color: var(--ink); font-size: 15px; line-height: 1.3; }
.foot-brand span { display: block; font-size: 13px; line-height: 1.4; }
.foot-links { display: flex; flex-wrap: wrap; gap: 6px 22px; }
.foot-links a, .foot-legal a { color: var(--ink2); }
.foot-legal { grid-column: 1 / -1; display: flex; flex-wrap: wrap; gap: 6px 22px; padding-top: 18px; border-top: 1px solid var(--line); }

/* 文档页（隐私政策、用户协议、技术支持） */
.doc { max-width: 760px; margin-inline: auto; padding-inline: var(--gutter); padding-block: 56px 0; }
.doc h1 { font-size: clamp(32px, 4.4vw, 44px); line-height: 1.2; letter-spacing: -.02em; }
.doc .meta { margin-top: 10px; margin-bottom: 32px; font-size: 14px; color: var(--ink3); }
.doc h2 { font-size: 22px; line-height: 1.4; margin-top: 48px; margin-bottom: 10px; }
.doc h3 { font-size: 17px; margin-top: 24px; margin-bottom: 6px; }
.doc p, .doc li { color: var(--ink2); }
.doc p + p { margin-top: 12px; }
.doc ul { padding-left: 1.2em; margin-top: 8px; }
.doc li { margin-block: 4px; }
.doc strong { color: var(--ink); }
.doc .summary { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 24px; }
.doc .summary p { color: var(--ink); }
.doc .summary p + p { margin-top: 8px; }
.doc .table-wrap { overflow-x: auto; margin-top: 10px; }
.doc table { width: 100%; min-width: 460px; border-collapse: collapse; font-size: 15px; }
.doc th, .doc td { text-align: left; padding: 11px 10px 11px 0; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--ink2); }
.doc th { color: var(--ink); font-weight: 600; }
.doc h2 + details { border-top: 1px solid var(--line); }
.todo { background: var(--mark); color: var(--mark-ink); border-radius: 4px; padding: 0 4px; }

/* 窄屏 */
@media (max-width: 1000px) {
  .hero { gap: 44px; }
  .split, .split.rev { gap: 52px; }
  .grid3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .role { grid-template-columns: minmax(0, 150px) minmax(0, 1fr); }
  .role .f { grid-column: 2; }
}
@media (max-width: 880px) {
  .hero { grid-template-columns: minmax(0, 1fr); padding-top: 36px; }
  .spec-wrap { justify-self: center; }
  .split, .split.rev { grid-template-columns: minmax(0, 1fr); }
  .split .shot { order: 2; max-width: 270px; }
  .split.rev .files { order: 2; }
  .flow { grid-template-columns: minmax(0, 1fr); }
  .steps { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .steps li { grid-template-columns: 30px minmax(0, 1fr); column-gap: 16px; row-gap: 2px; }
  .steps li::before { grid-row: 1 / span 2; }
  .steps li:not(:last-child)::after { top: 38px; bottom: -18px; left: 15px; right: auto; width: 1px; height: auto; }
  .cut { width: 2px; height: 56px; margin-left: 44px; background: repeating-linear-gradient(180deg, var(--ink3) 0 6px, transparent 6px 12px); }
  .cloud { justify-self: start; max-width: 360px; }
  .plans { grid-template-columns: minmax(0, 1fr); }
  .closing { grid-template-columns: minmax(0, 1fr); padding: 40px 28px; gap: 22px; justify-items: start; }
}
@media (max-width: 600px) {
  :root { --gutter: 20px; }
  body { font-size: 16px; }
  .nav { gap: 4px 16px; font-size: 14px; }
  .nav .wide { display: none; }
  .band { padding-block: 72px 0; }
  .lead { font-size: 17px; }
  .sub { font-size: 16.5px; }
  .grid3 { grid-template-columns: minmax(0, 1fr); gap: 28px; }
  .role { grid-template-columns: minmax(0, 1fr); gap: 2px; }
  .role .f { grid-column: auto; margin-top: 4px; }
  .device { padding: 36px 20px 24px; }
  .spec { border-radius: 38px; padding-inline: 16px; }
  .plan { padding: 26px 22px 28px; }
  .closing { margin-top: 88px; }
  .foot-in { grid-template-columns: minmax(0, 1fr); }
}