:root {
  --cold: #fafaf9;
  --warm: #f5f1ea;
  --ink: #1a1815;
  --ink-2: rgba(0,0,0,.45);
  --ink-3: rgba(0,0,0,.35);
  --line: rgba(0,0,0,.06);
  --line-2: rgba(0,0,0,.12);
  --card: rgba(0,0,0,.02);
  --sky: #6BAFDF;
  --sky-light: #99D6FF;
  --mint: #4DB899;
  --orange: #E8702A;
  --beige: #C4B89A;
  --sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --serif: 'Noto Serif SC', 'Playfair Display', Georgia, serif;
  --mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
  --ease-out: cubic-bezier(.22, 1, .36, 1);      /* ≈ power3.out */
  --ease-back: cubic-bezier(.34, 1.56, .64, 1);  /* ≈ back.out(1.3) */
  --ease-pop: cubic-bezier(.34, 1.9, .64, 1);    /* ≈ elastic.out 的近似 */
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--cold); color: var(--ink); font: 400 15px/1.7 var(--sans); font-variant-numeric: tabular-nums; }
a { color: inherit; }
button, input, select, textarea { font: inherit; color: inherit; }
button { cursor: pointer; }
:focus-visible { outline: 2px solid var(--sky); outline-offset: 3px; }
img, video { display: block; max-width: 100%; }
[hidden] { display: none !important; }
h1, h2, h3 { margin: 0; font-family: var(--serif); letter-spacing: -.02em; }
h1 em, h2 em { font-family: 'Playfair Display', var(--serif); font-style: italic; font-weight: 700; letter-spacing: 0; color: var(--sky); white-space: nowrap; }
.wrap { width: min(1100px, 86vw); margin: 0 auto; }
.mono { font-family: var(--mono); }

/* ---------- 顶部进度条 + 导航 */
.progress { position: fixed; left: 0; top: 0; height: 3px; width: 0; background: var(--sky); z-index: 50; }
.nav { position: sticky; top: 0; z-index: 40; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 20px 48px; background: rgba(250,250,249,.82); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--serif); font-weight: 900; font-size: 20px; letter-spacing: -.02em; }
.brand svg { width: 24px; height: 24px; }
.nav-links { display: flex; gap: 26px; }
.nav-links a { text-decoration: none; font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-2); }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--ink); }
.nav-cta { display: flex; gap: 12px; }
.nav-cta .gh { gap: 7px; }
.nav-cta .gh svg { width: 16px; height: 16px; fill: currentColor; }
@media (max-width: 860px) {
  .nav { padding: 12px 16px 0; flex-wrap: wrap; row-gap: 10px; }
  /* 窄屏只留图标，别和「本地视频」挤在一行 */
  .nav-cta .gh span { display: none; }
  .nav-cta .gh { padding: 8px 11px; }
  .nav-links { order: 3; width: calc(100% + 32px); margin: 0 -16px; padding: 0 16px 12px; gap: 18px; justify-content: safe center; overflow-x: auto; scrollbar-width: none; -webkit-overflow-scrolling: touch; }
  .nav-links::-webkit-scrollbar { display: none; }
  .nav-links a { flex: 0 0 auto; }
}

/* ---------- 按钮 */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 14px 32px; border-radius: 999px; border: 1px solid var(--ink); background: transparent; color: var(--ink); font-weight: 600; font-size: 15px; line-height: 1.2; white-space: nowrap; text-decoration: none; transition: color .2s, background .2s, border-color .2s; }
.btn:hover { border-color: var(--sky); color: var(--sky); }
.btn.dark { background: var(--ink); color: var(--warm); border-color: var(--ink); }
.btn.dark:hover { background: #0a0a0a; color: var(--sky-light); border-color: #0a0a0a; }
.btn.sm { padding: 8px 16px; font-size: 13px; }
.btn.quiet { border-color: transparent; padding: 8px 12px; font-size: 13px; }
.btn.quiet:hover { border-color: var(--line-2); color: var(--ink); background: var(--card); }
.btn.block { width: 100%; }
.btn:disabled { opacity: .45; cursor: default; }
.btn:active { transform: translateY(1px); }

/* ---------- section 骨架 */
.sec { position: relative; overflow: hidden; padding: 96px 0; }
.sec.full { min-height: 100vh; display: flex; align-items: center; }
.sec.warm { background: var(--warm); }
.sec.cold { background: var(--cold); }
@media (max-width: 860px) { .sec { padding: 64px 0; } .sec.full { min-height: auto; } }
.eyebrow { display: inline-block; margin-bottom: 16px; font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.sec h2 { font-size: clamp(2.5rem, 5vw, 4.2rem); font-weight: 700; line-height: 1.15; max-width: 16em; }
.sec .sub { margin: 18px 0 0; font-size: 17px; line-height: 1.7; color: var(--ink-2); max-width: 36em; }
.sec-head { margin-bottom: 48px; }
.shape { position: absolute; border-radius: 50%; filter: blur(90px); opacity: .25; pointer-events: none; will-change: transform; }
.shape.sky { background: var(--sky); } .shape.mint { background: var(--mint); } .shape.orange { background: var(--orange); } .shape.beige { background: var(--beige); }

/* ---------- 卡片 */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 36px; transition: border-color .25s, box-shadow .25s; }
.card:hover { border-color: var(--line-2); box-shadow: 0 20px 60px rgba(0,0,0,.04); }
.card h3 { font-size: 21px; font-weight: 700; line-height: 1.3; }
.card p { margin: 10px 0 0; font-size: 14px; line-height: 1.7; color: var(--ink-2); }
.card .spec { display: block; margin-top: 18px; font-family: var(--mono); font-size: 12px; color: var(--ink-3); letter-spacing: .02em; }
.grid3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
@media (max-width: 860px) { .grid3, .grid2 { grid-template-columns: 1fr; } .card { padding: 28px; } }
a.card { display: block; text-decoration: none; }
.pill { display: inline-block; padding: 3px 10px; border-radius: 99px; border: 1px solid var(--line-2); font-size: 11px; font-weight: 700; letter-spacing: .06em; color: var(--ink-2); }

/* ---------- 入场动画 */
[data-reveal] { opacity: 0; transform: translateY(48px); transition: opacity .7s var(--ease-out), transform .7s var(--ease-out); transition-delay: calc(var(--i, 0) * 70ms); }
[data-reveal="card"] { transform: translateY(70px) scale(.9); transition-timing-function: var(--ease-back); transition-duration: .65s; }
[data-reveal="left"] { transform: translateX(-60px); transition-duration: .6s; }
[data-reveal="pop"] { transform: scale(.5); transition-timing-function: var(--ease-pop); transition-duration: .8s; }
[data-reveal].in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { [data-reveal] { opacity: 1; transform: none; transition: none; } .shape { transform: none !important; } html { scroll-behavior: auto; } * { transition: none !important; animation: none !important; } }

/* ---------- S1 hero + 工具 */
.hero { text-align: center; padding: 72px 0 80px; }
.hero h1 { font-size: clamp(3.5rem, 8vw, 7rem); font-weight: 900; line-height: .95; letter-spacing: -.02em; margin: 0 auto; max-width: 11em; }
.hero .sub { margin: 28px auto 0; font-size: 17px; line-height: 1.7; color: var(--ink-2); max-width: 34em; }
.paste { margin: 40px auto 0; max-width: 760px; display: flex; gap: 10px; align-items: stretch; background: #fff; border: 1px solid var(--line-2); border-radius: 999px; padding: 6px 6px 6px 22px; box-shadow: 0 20px 60px rgba(0,0,0,.05); text-align: left; }
.paste:focus-within { border-color: var(--sky); box-shadow: 0 0 0 4px rgba(107,175,223,.18), 0 20px 60px rgba(0,0,0,.05); }
.paste textarea { flex: 1; min-width: 0; resize: none; border: 0; background: transparent; padding: 12px 0; height: 50px; line-height: 1.6; font-size: 16px; }
.paste textarea:focus { outline: none; }
.paste textarea::placeholder { color: var(--ink-3); }
.paste .btn { padding: 12px 30px; }
.paste-tools { display: flex; align-items: center; gap: 4px; align-self: center; }
.paste .tool { border: 0; background: transparent; color: var(--ink-2); border-radius: 999px; min-width: 36px; height: 36px; padding: 0 12px; font-size: 13px; font-weight: 600; line-height: 36px; }
.paste .tool:hover { background: var(--card); color: var(--ink); }
.paste .tool.clear { font-size: 22px; padding: 0; width: 36px; }
@media (max-width: 600px) {
  .hero { padding: 40px 0 56px; }
  .hero h1 { font-size: clamp(2.2rem, 10.5vw, 3.5rem); line-height: 1.02; }
  .hero .sub { font-size: 15.5px; margin-top: 20px; }
  .paste { border-radius: 24px; flex-direction: column; padding: 8px; margin-top: 28px; position: relative; }
  .paste textarea { padding: 8px 56px 8px 12px; }
  .paste .btn { width: 100%; }
  .paste-tools { position: absolute; right: 12px; top: 12px; }
  .paste .tool { background: var(--warm); color: var(--ink); }
  .sec h2 { font-size: clamp(2rem, 9vw, 2.5rem); }
}
.supports { margin: 18px auto 0; font-size: 13px; color: var(--ink-3); max-width: 46em; line-height: 1.7; }
.supports b { color: var(--ink-2); font-weight: 600; }
.notice { margin: 18px auto 0; max-width: 760px; padding: 14px 18px; border-radius: 16px; background: rgba(232,112,42,.08); border: 1px solid rgba(232,112,42,.25); color: #9a4415; font-size: 14px; text-align: left; }
.notice.info { background: rgba(107,175,223,.1); border-color: rgba(107,175,223,.3); color: var(--ink); }

/* ---------- 解析结果 */
#result, #converter { text-align: left; scroll-margin-top: 92px; }
.res, .conv { background: #fff; border: 1px solid var(--line-2); border-radius: 20px; box-shadow: 0 20px 60px rgba(0,0,0,.05); }
.res { margin: 48px auto 0; max-width: 980px; padding: 32px; }
.res-head { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 12px; margin-bottom: 8px; font-size: 13px; color: var(--ink-2); }
.tag { display: inline-block; padding: 3px 10px; border-radius: 99px; background: var(--ink); color: var(--warm); font-size: 11px; font-weight: 700; letter-spacing: .06em; }
.res h2 { font-family: var(--sans); font-size: 20px; font-weight: 700; letter-spacing: -.01em; line-height: 1.4; margin: 4px 0 22px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; max-width: none; }
.res-body { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, 1fr); gap: 28px; align-items: start; }
@media (max-width: 760px) { .res-body { grid-template-columns: 1fr; } .res { padding: 22px; } }
.media { border-radius: 16px; overflow: hidden; background: #0a0a0a; display: flex; justify-content: center; }
.media video { max-height: 520px; width: auto; max-width: 100%; }
.media.portrait { justify-content: flex-start; background: transparent; }
.media.portrait video, .media.portrait img { border-radius: 16px; max-height: 520px; }
.side { display: flex; flex-direction: column; gap: 10px; }
.side .group { display: flex; flex-wrap: wrap; gap: 10px; }
.side .rule { border-top: 1px solid var(--line); margin: 10px 0 2px; }
.side .label { font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin: 4px 0 0; }
.menu { position: relative; }
.menu-list { position: absolute; left: 0; top: calc(100% + 8px); z-index: 20; min-width: 240px; max-width: calc(100vw - 40px); background: #fff; border: 1px solid var(--line-2); border-radius: 16px; padding: 6px; box-shadow: 0 20px 60px rgba(0,0,0,.08); }
.menu-list button, .menu-list a { display: flex; width: 100%; justify-content: space-between; gap: 12px; border: 0; background: none; padding: 10px 12px; border-radius: 10px; text-align: left; font-weight: 600; text-decoration: none; color: inherit; font-size: 14px; }
.menu-list button:hover, .menu-list a:hover { background: var(--card); color: var(--sky); }
.menu-list small { font-family: var(--mono); font-size: 12px; color: var(--ink-3); font-weight: 500; }
.sheet-title { margin: 28px 0 12px; font-size: 13px; color: var(--ink-2); display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.live-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 0 0 14px; }
.live-actions .label { font-size: 11px; font-weight: 700; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); margin-right: 4px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 14px; }
.tile { position: relative; border-radius: 16px; overflow: hidden; background: var(--card); border: 1px solid var(--line); }
.tile img { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; }
.tile .bar { display: flex; gap: 2px; padding: 6px 4px 6px 10px; justify-content: space-between; align-items: center; font-family: var(--mono); font-size: 12px; color: var(--ink-3); }
.tile .bar > div { display: flex; flex-wrap: nowrap; }
.tile .bar .btn { padding: 4px 8px; font-size: 12.5px; }
.tile .live { position: absolute; top: 10px; left: 10px; display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px 3px 7px; border-radius: 99px; background: var(--orange); color: #fff; font-size: 11px; font-weight: 700; letter-spacing: .06em; }
.tile .live::before { content: ""; width: 9px; height: 9px; border-radius: 50%; border: 2px solid #fff; box-shadow: inset 0 0 0 1px var(--orange), inset 0 0 0 4px #fff; }

/* ---------- 任务 */
.jobs { display: flex; flex-direction: column; gap: 10px; }
.job { border: 1px solid var(--line); border-radius: 16px; padding: 12px 16px; font-size: 14px; background: #fff; }
.job .row { display: flex; justify-content: space-between; gap: 10px; align-items: center; }
.job .row b { font-weight: 600; }
.job .row small { font-size: 12px; color: var(--ink-3); white-space: nowrap; }
.bar-track { height: 3px; border-radius: 2px; background: var(--line); margin-top: 10px; overflow: hidden; }
.bar-fill { height: 100%; width: 0; background: var(--mint); transition: width .3s; }
.job.err { border-color: rgba(232,112,42,.5); }
.job.err .row small { color: var(--orange); white-space: normal; }

/* ---------- 转换器 */
.conv { margin: 28px auto 0; max-width: 980px; padding: 32px; }
.conv-head { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 22px; flex-wrap: wrap; }
.conv-head h2 { font-family: var(--sans); font-size: clamp(1.2rem, 2vw, 1.4rem); font-weight: 700; letter-spacing: -.01em; flex: 1 1 220px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; margin: 0; max-width: none; }
.tabs { display: inline-flex; border: 1px solid var(--line-2); border-radius: 999px; padding: 4px; gap: 2px; background: #fff; }
.tabs button { border: 0; background: transparent; padding: 8px 16px; border-radius: 999px; font-weight: 600; font-size: 13px; color: var(--ink-2); white-space: nowrap; }
.tabs button[aria-selected="true"] { background: var(--ink); color: var(--warm); }
@media (max-width: 600px) { .tabs { width: 100%; } .tabs button { flex: 1; padding: 8px 6px; } }
.conv-grid { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, 1fr); gap: 28px; align-items: start; }
@media (max-width: 760px) { .conv-grid { grid-template-columns: 1fr; } .conv { padding: 22px; } }
.conv .media video { max-height: 440px; }
.trim { margin-top: 14px; user-select: none; -webkit-user-select: none; }
.strip { position: relative; height: 76px; border-radius: 14px; overflow: hidden; background: var(--warm); border: 1px solid var(--line-2); touch-action: none; cursor: crosshair; }
.strip img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: fill; opacity: .35; }
.strip .sel-img { position: absolute; top: 0; bottom: 0; overflow: hidden; pointer-events: none; }
.strip .sel-img img { opacity: 1; width: auto; }
.strip .sel { position: absolute; top: 0; bottom: 0; border: 2px solid var(--sky); border-radius: 12px; pointer-events: none; z-index: 3; box-shadow: 0 0 0 1px #fff inset; }
.strip .handle { position: absolute; top: 0; bottom: 0; width: 20px; margin-left: -10px; cursor: ew-resize; z-index: 4; display: flex; align-items: center; justify-content: center; }
@media (pointer: coarse) {
  .strip { height: 88px; }
  .strip .handle { width: 36px; margin-left: -18px; }
  .btn.sm, .btn.quiet, .tile .bar .btn { min-height: 40px; }
  .tabs button { min-height: 40px; }
  .field input[type="range"] { height: 32px; }
}
.strip .handle::after { content: ""; width: 8px; height: 30px; border-radius: 99px; background: var(--ink); box-shadow: 0 0 0 2px #fff; }
.strip .handle:hover::after, .strip .handle:focus-visible::after { background: var(--sky); }
.strip .cursor { position: absolute; top: 0; bottom: 0; width: 2px; background: var(--ink); pointer-events: none; z-index: 3; }
.strip.loading::before { content: "正在生成缩略图…"; position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; color: var(--ink-3); font-size: 13px; z-index: 1; }
.times { display: flex; justify-content: space-between; margin-top: 10px; font-size: 13px; color: var(--ink-2); }
.times b { font-family: var(--mono); color: var(--ink); font-weight: 600; }
.field { display: grid; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 13px; color: var(--ink-2); display: flex; justify-content: space-between; }
.field label output { font-family: var(--mono); color: var(--ink); font-weight: 600; font-size: 13px; }
.field input[type="range"] { width: 100%; accent-color: var(--ink); }
.field select { width: 100%; min-height: 40px; padding: 0 12px; border: 1px solid var(--line-2); border-radius: 12px; background: #fff; font-size: 14px; }
.hint { font-size: 13px; color: var(--ink-3); line-height: 1.6; margin: 0; }
.hint b { color: var(--ink-2); font-weight: 600; }
.result { margin-top: 28px; border-top: 1px solid var(--line); padding-top: 24px; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, 1fr); gap: 28px; align-items: start; }
@media (max-width: 760px) { .result { grid-template-columns: 1fr; } }
.result .prev { border-radius: 16px; overflow: hidden; background: #0a0a0a; max-height: 440px; display: flex; justify-content: center; position: relative; }
.result .prev img, .result .prev video { max-height: 440px; width: auto; }
.result .prev video { position: absolute; inset: 0; margin: auto; opacity: 0; transition: opacity .15s; }
.result .prev.playing video { opacity: 1; }
.result .prev .tip { position: absolute; left: 12px; bottom: 12px; background: rgba(255,255,255,.92); color: var(--ink); font-size: 11px; font-weight: 700; letter-spacing: .06em; padding: 4px 10px; border-radius: 99px; }
.result .side .size { color: var(--ink-3); font-size: 12px; overflow-wrap: anywhere; }
.spin { display: inline-block; width: 14px; height: 14px; border: 2px solid currentColor; border-right-color: transparent; border-radius: 50%; animation: spin .8s linear infinite; vertical-align: -2px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- S4 终端 */
.term { background: #fff; border: 1px solid var(--line-2); border-radius: 16px; min-height: 300px; padding: 22px 26px; font-family: var(--mono); font-size: 13px; line-height: 1.75; overflow-x: auto; box-shadow: 0 20px 60px rgba(0,0,0,.04); }
.term .dots { display: flex; gap: 6px; margin-bottom: 16px; }
.term .dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--line-2); }
.term pre { margin: 0; white-space: pre; }
.term .c { color: #059669; } .term .f { color: #2563eb; } .term .s { color: #b45309; } .term .n { color: #7c3aed; } .term .m { color: rgba(0,0,0,.5); }
.steps { display: grid; gap: 14px; }
.step { display: grid; grid-template-columns: 44px 1fr; gap: 14px; align-items: start; padding: 20px 22px; }
.step .num { font-family: var(--mono); font-size: 12px; color: var(--ink-3); padding-top: 4px; }
.step h3 { font-size: 18px; }
.step p { margin-top: 6px; }

/* ---------- S5 数字 */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 860px) { .stats { grid-template-columns: 1fr 1fr; } }
.stat { padding: 32px 28px; }
.stat .num { font-family: var(--mono); font-size: clamp(3rem, 6vw, 5rem); font-weight: 700; line-height: 1; letter-spacing: -.03em; }
.stat .num small { font-size: .4em; color: var(--ink-3); margin-left: 4px; }
.stat .cap { margin-top: 12px; font-size: 14px; color: var(--ink-2); }

/* ---------- S6 问答 + 页脚 */
.faq details { border-bottom: 1px solid var(--line); padding: 18px 0; }
.faq details:first-of-type { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; font-family: var(--serif); font-weight: 700; font-size: 19px; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--ink-3); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin: 10px 0 0; color: var(--ink-2); font-size: 15px; line-height: 1.7; max-width: 60em; }
.more { margin-top: 56px; }
.more ul { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px; }
.more a { display: inline-block; padding: 8px 16px; border: 1px solid var(--line-2); border-radius: 999px; text-decoration: none; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.more a:hover { border-color: var(--sky); color: var(--sky); }
.more a[aria-current="page"] { background: var(--ink); color: var(--warm); border-color: var(--ink); }
.foot { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 12px; letter-spacing: .02em; display: flex; flex-wrap: wrap; gap: 8px 24px; }
.foot a { color: var(--ink-2); }

/* ---------- 教程 / 文章页 */
.article { padding: 64px 0 80px; }
.wrap.narrow { width: min(760px, 86vw); }
.crumbs { font-size: 12px; color: var(--ink-3); margin-bottom: 20px; display: flex; gap: 8px; }
.crumbs a { color: var(--ink-2); text-decoration: none; }
.article h1 { font-size: clamp(2rem, 4.6vw, 3.2rem); font-weight: 900; line-height: 1.15; }
.article .meta { font-family: var(--mono); font-size: 12px; color: var(--ink-3); margin: 14px 0 0; }
.article .intro { font-size: 17px; line-height: 1.75; color: var(--ink-2); margin: 20px 0 0; }
.article h2 { font-size: 26px; font-weight: 700; margin: 44px 0 14px; line-height: 1.3; }
.article p { font-size: 16px; line-height: 1.8; margin: 0 0 14px; }
.howto { list-style: none; margin: 0; padding: 0; counter-reset: step; display: grid; gap: 12px; }
.howto li { counter-increment: step; display: grid; grid-template-columns: 40px 1fr; gap: 12px; padding: 20px 22px; background: var(--card); border: 1px solid var(--line); border-radius: 20px; }
.howto li::before { content: counter(step, decimal-leading-zero); font-family: var(--mono); font-size: 12px; color: var(--ink-3); padding-top: 5px; }
.howto h3 { font-size: 18px; font-weight: 700; }
.howto p { grid-column: 2; margin: 4px 0 0; font-size: 15px; color: var(--ink-2); }
.cta { margin: 22px 0 0; }
.related { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.related a { display: block; padding: 14px 18px; border: 1px solid var(--line); border-radius: 14px; text-decoration: none; font-weight: 600; background: var(--card); }
.related a:hover { border-color: var(--sky); color: var(--sky); }
.guide-list { list-style: none; margin: 32px 0 0; padding: 0; display: grid; gap: 14px; }
.guide-list a { display: block; padding: 26px 28px; border: 1px solid var(--line); border-radius: 20px; text-decoration: none; background: var(--card); transition: border-color .25s, box-shadow .25s; }
.guide-list a:hover { border-color: var(--line-2); box-shadow: 0 20px 60px rgba(0,0,0,.04); }
.guide-list h2 { font-size: 20px; margin: 0; }
.guide-list p { margin: 8px 0 0; font-size: 14px; color: var(--ink-2); }
/* 落地页独有正文 */
.page-body { margin-top: 56px; text-align: left; }
.page-body .grid3 .card h3 { font-size: 18px; }
.page-body .card p { font-size: 14.5px; }
.tips { margin-top: 20px; }
.tips ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.tips a { display: inline-block; padding: 8px 14px; border: 1px solid var(--line-2); border-radius: 999px; text-decoration: none; font-size: 13px; font-weight: 600; color: var(--ink-2); }
.tips a:hover { border-color: var(--sky); color: var(--sky); }

/* ---------- 使用统计（站长） */
.dash .wrap { position: relative; }
.dash h1 { max-width: none; }
.dash-bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; margin: 32px 0 20px; }
.dash-note { font-size: 12px; color: var(--ink-3); }
.kpis { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.kpis .stat { padding: 26px 24px; }
.kpis .stat .num { font-size: clamp(2.2rem, 4vw, 3.4rem); }
.kpis .stat .cap { margin-top: 8px; font-size: 13px; }
@media (max-width: 860px) { .kpis { grid-template-columns: 1fr 1fr; } }
.chart { margin-top: 20px; padding: 24px 24px 12px; background: #fff; transition: opacity .2s; }
.chart.loading { opacity: .5; }
.chart-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.chart-head h3 { font-family: var(--sans); font-size: 15px; font-weight: 600; letter-spacing: 0; }
.legend { display: flex; gap: 16px; font-size: 12px; color: var(--ink-2); }
.legend i, .tip .row i { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 6px; vertical-align: -1px; }
.chart-body { width: 100%; }
.chart svg { display: block; width: 100%; height: auto; overflow: visible; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .tick { font-family: var(--mono); font-size: 11px; fill: var(--ink-3); }
.chart .cap-label { font-family: var(--mono); font-size: 11px; font-weight: 600; fill: var(--ink); }
.chart .bar { outline: none; }
.chart .bar path { transition: opacity .12s; }
.chart .bar.partial path { opacity: .55; }
.chart .bar:hover path, .chart .bar:focus-visible path { opacity: .75; }
.chart .bar:focus-visible rect { stroke: var(--sky); stroke-width: 2; }
.tip { position: absolute; z-index: 5; min-width: 150px; padding: 10px 12px; background: var(--ink); color: var(--warm); border-radius: 12px; font-size: 12px; line-height: 1.5; pointer-events: none; box-shadow: 0 12px 32px rgba(0,0,0,.18); }
.tip b { display: block; font-weight: 600; margin-bottom: 4px; opacity: .8; }
.tip .row { display: flex; align-items: center; gap: 6px; }
.tip .row span { font-family: var(--mono); font-weight: 700; font-size: 13px; }
.tip .row small { font-size: 11px; opacity: .7; }
.dash-table { margin-top: 12px; }
.dash-table summary { cursor: pointer; font-size: 13px; color: var(--ink-2); list-style: none; }
.dash-table summary::-webkit-details-marker { display: none; }
.dash-table summary::before { content: "+ "; font-family: var(--mono); color: var(--ink-3); }
.dash-table[open] summary::before { content: "– "; }
.dash-grid { margin-top: 20px; }
.dash-grid .card { padding: 24px; background: #fff; }
.dash-grid .card h3 { font-family: var(--sans); font-size: 15px; font-weight: 600; letter-spacing: 0; margin-bottom: 6px; }
.tbl-wrap { overflow-x: auto; }
.tbl-wrap table { width: 100%; border-collapse: collapse; font-size: 13px; }
.tbl-wrap th, .tbl-wrap td { padding: 8px 10px 8px 0; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
.tbl-wrap th:first-child, .tbl-wrap td:first-child { text-align: left; }
.tbl-wrap th { font-weight: 600; font-size: 11px; letter-spacing: .06em; color: var(--ink-3); text-transform: uppercase; }
.tbl-wrap td { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.tbl-wrap td:first-child { font-family: var(--sans); }
.tbl-wrap td.muted { color: var(--ink-3); text-align: left; }
.dash .notice { margin: 0 0 20px; max-width: none; }