/* SnapTab 官网样式（2026-11 改版）：系统字体、大留白、大标题、少用色。 */

:root {
  --bg: #ffffff;
  --bg-alt: #f5f5f7;
  --tile: #f5f5f7;
  --tile-on-alt: #ffffff;
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --ink-3: #86868b;
  --line: #d2d2d7;
  --hair: rgba(0, 0, 0, 0.08);
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --link: #0066cc;
  --sig: #e30000;
  --up: #1a8c3a;
  --nav-bg: rgba(255, 255, 255, 0.78);
  --shot-shadow: 0 30px 80px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.06);
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
  --wrap: 980px;
  --wide: 1200px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-alt: #101012;
    --tile: #1d1d1f;
    --tile-on-alt: #1d1d1f;
    --ink: #f5f5f7;
    --ink-2: #a1a1a6;
    --ink-3: #86868b;
    --line: #424245;
    --hair: rgba(255, 255, 255, 0.12);
    --blue: #0071e3;
    --blue-hover: #147ce5;
    --link: #2997ff;
    --sig: #ff453a;
    --up: #30d158;
    --nav-bg: rgba(22, 22, 23, 0.78);
    --shot-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  }
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.53;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 6px; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, .lede, .sec-head p, .closer p { text-wrap: balance; }
.wrap { width: min(var(--wrap), 100% - 44px); margin-inline: auto; }
.wide { width: min(var(--wide), 100% - 44px); margin-inline: auto; }
.center { text-align: center; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ───────── 导航 ───────── */

.nav {
  position: sticky; top: 0; z-index: 50;
  background: var(--nav-bg);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hair);
}
.nav-in { height: 52px; display: flex; align-items: center; gap: 28px; }
.brand { display: flex; align-items: center; gap: 8px; color: var(--ink); font-weight: 600; font-size: 17px; letter-spacing: -0.02em; }
.brand:hover { text-decoration: none; }
.brand img { width: 22px; height: 22px; }
.nav-links { display: flex; gap: 30px; margin-left: auto; list-style: none; padding: 0; margin-block: 0; }
.nav-links a { color: var(--ink); opacity: 0.8; font-size: 13px; }
.nav-links a:hover { opacity: 1; text-decoration: none; }
.nav-links a[aria-current="page"] { opacity: 1; font-weight: 600; }
.nav-cta { font-size: 13px; padding: 5px 14px; }
.nav-toggle { display: none; margin-left: auto; width: 40px; height: 40px; border: 0; background: none; color: var(--ink); cursor: pointer; border-radius: 10px; }
.nav-toggle svg { width: 20px; height: 20px; margin: auto; }

@media (max-width: 760px) {
  .nav-in { gap: 8px; }
  .nav-toggle { display: grid; }
  .nav-links {
    display: none; position: absolute; left: 0; right: 0; top: 52px;
    flex-direction: column; gap: 0; padding: 8px 22px 20px;
    background: var(--bg); border-bottom: 1px solid var(--hair);
  }
  .nav.open .nav-links { display: flex; }
  .nav-links a { display: block; padding: 12px 0; font-size: 20px; font-weight: 600; opacity: 1; border-bottom: 1px solid var(--hair); }
  .nav-cta { order: 3; }
}

/* ───────── 按钮和链接 ───────── */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  background: var(--blue); color: #fff; border: 1px solid transparent;
  font: inherit; font-size: 17px; font-weight: 400; line-height: 1.2;
  padding: 12px 24px; border-radius: 980px; cursor: pointer;
  transition: background-color 0.2s ease;
}
.btn:hover { background: var(--blue-hover); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--link); border-color: var(--link); }
.btn.ghost:hover { background: var(--link); color: #fff; }
.btn.small { font-size: 14px; padding: 8px 16px; }
.btn[disabled] { opacity: 0.5; cursor: default; }
.more { display: inline-flex; align-items: center; gap: 2px; font-size: 17px; }
.more::after {
  content: ""; width: 7px; height: 7px; margin-left: 4px;
  border-top: 1.5px solid currentColor; border-right: 1.5px solid currentColor; transform: rotate(45deg);
}
.actions { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 16px 30px; }

/* ───────── 版面 ───────── */

.sec { padding: 120px 0; }
.sec.alt { background: var(--bg-alt); }
.sec.tight { padding: 88px 0; }
.sec-head { text-align: center; margin-bottom: 64px; }
.sec-head h2, .h2 { font-size: clamp(34px, 5vw, 56px); line-height: 1.07; font-weight: 600; letter-spacing: -0.025em; }
.sec-head p, .lede { margin-top: 16px; font-size: clamp(19px, 2vw, 24px); line-height: 1.38; color: var(--ink-2); letter-spacing: -0.015em; }
.sec-head p { max-width: 34em; margin-inline: auto; }

@media (max-width: 760px) {
  .sec { padding: 76px 0; }
  .sec-head { margin-bottom: 40px; }
}

/* ───────── 首屏 ───────── */

.hero { padding: 88px 0 0; text-align: center; overflow: hidden; }
.hero .kicker { font-size: clamp(19px, 2.4vw, 26px); font-weight: 600; letter-spacing: -0.02em; }
.hero h1 {
  margin-top: 10px;
  font-size: clamp(44px, 8vw, 88px); line-height: 1.04; font-weight: 700; letter-spacing: -0.035em;
}
.hero .lede { max-width: 30em; margin: 22px auto 0; }
.hero .actions { margin-top: 34px; }
.hero .stage { margin: 72px auto 0; padding-bottom: 120px; }
.page-hero { padding: 96px 0 72px; text-align: center; }
.page-hero h1 { font-size: clamp(40px, 7vw, 72px); line-height: 1.05; font-weight: 700; letter-spacing: -0.03em; }
.page-hero .lede { max-width: 32em; margin: 20px auto 0; }
.page-hero .actions { margin-top: 30px; }

@media (max-width: 760px) {
  .hero { padding-top: 56px; }
  .hero .stage { margin-top: 48px; padding-bottom: 76px; }
  .page-hero { padding: 64px 0 48px; }
}

/* ───────── 首屏的交叉表“产品图” ───────── */

.shot {
  max-width: 920px; margin-inline: auto; text-align: left;
  background: var(--bg); border: 1px solid var(--hair); border-radius: 24px;
  box-shadow: var(--shot-shadow); overflow: hidden;
}
.shot-bar { display: flex; align-items: center; gap: 8px; padding: 14px 18px; border-bottom: 1px solid var(--hair); }
.shot-bar i { width: 12px; height: 12px; border-radius: 50%; background: var(--line); }
.shot-bar span { margin-left: 10px; font-size: 13px; color: var(--ink-3); }
.ask { padding: 26px 28px 6px; display: grid; gap: 14px; }
.bubble {
  justify-self: end; max-width: 80%;
  background: var(--blue); color: #fff; padding: 11px 16px; border-radius: 20px 20px 6px 20px;
  font-size: 15px; line-height: 1.45;
}
.reply { max-width: 90%; font-size: 15px; line-height: 1.55; color: var(--ink); }
.reply b { font-weight: 600; }
.sheet { padding: 18px 28px 30px; overflow-x: auto; }
.sheet-title { font-size: 15px; font-weight: 600; margin-bottom: 12px; }
.xt { border-collapse: collapse; width: 100%; min-width: 640px; font-size: 14px; font-variant-numeric: tabular-nums; }
.xt th, .xt td { padding: 7px 10px; text-align: right; white-space: nowrap; }
.xt th:first-child, .xt td:first-child { text-align: left; color: var(--ink-2); }
.xt thead th { font-weight: 600; color: var(--ink); border-bottom: 1px solid var(--line); vertical-align: bottom; }
.xt thead .grp th { font-weight: 500; color: var(--ink-3); font-size: 12px; border-bottom: 0; padding-bottom: 2px; }
.xt thead .grp th[colspan] { text-align: center; }
.xt thead em { display: block; font-style: normal; font-weight: 400; color: var(--ink-3); font-size: 12px; }
.xt tbody tr + tr td { border-top: 1px solid var(--hair); }
.xt .gs { border-left: 1px solid var(--line); padding-left: 14px; }
.xt thead .grp th.gs { border-bottom: 1px solid var(--line); text-align: center; padding-bottom: 6px; }
.xt .sum td { font-weight: 600; color: var(--ink); }
.xt .base td { color: var(--ink-3); font-size: 13px; }
.xt sup { color: var(--sig); font-weight: 600; font-size: 11px; margin-left: 3px; vertical-align: 2px; }
.xt .hi { background: color-mix(in srgb, var(--blue) 7%, transparent); }
.sheet-note { margin-top: 12px; font-size: 12px; color: var(--ink-3); }
.sheet-note b { color: var(--sig); font-weight: 600; }

@media (prefers-reduced-motion: no-preference) {
  .shot .bubble { animation: rise 0.6s 0.2s both cubic-bezier(0.2, 0.8, 0.2, 1); }
  .shot .reply { animation: fade 0.6s 0.9s both; }
  .shot .xt tbody tr { animation: fade 0.45s both; }
  .shot .xt tbody tr:nth-child(1) { animation-delay: 1.2s; }
  .shot .xt tbody tr:nth-child(2) { animation-delay: 1.28s; }
  .shot .xt tbody tr:nth-child(3) { animation-delay: 1.36s; }
  .shot .xt tbody tr:nth-child(4) { animation-delay: 1.44s; }
  .shot .xt tbody tr:nth-child(5) { animation-delay: 1.52s; }
  .shot .xt tbody tr:nth-child(6) { animation-delay: 1.6s; }
  .shot .xt tbody tr:nth-child(7) { animation-delay: 1.68s; }
  .shot .xt tbody tr:nth-child(8) { animation-delay: 1.76s; }
  @keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
  @keyframes fade { from { opacity: 0; } to { opacity: 1; } }
}

@media (max-width: 760px) {
  .ask, .sheet { padding-inline: 18px; }
  .bubble, .reply { font-size: 14px; }
}

/* ───────── 支持的 AI 工具 ───────── */

.hosts { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px 44px; list-style: none; padding: 0; margin: 0; }
.hosts li { font-size: clamp(22px, 3vw, 32px); font-weight: 600; letter-spacing: -0.02em; color: var(--ink); }
.hosts-note { margin-top: 28px; text-align: center; color: var(--ink-2); font-size: 15px; }

/* ───────── 拼贴格 ───────── */

.bento { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; }
.tile {
  grid-column: span 3; background: var(--tile); border-radius: 28px; padding: 44px 40px 40px;
  display: flex; flex-direction: column; gap: 12px; min-height: 340px; overflow: hidden;
}
.sec.alt .tile { background: var(--tile-on-alt); }
.tile.w2 { grid-column: span 2; }
.tile.w4 { grid-column: span 4; }
.tile.w6 { grid-column: span 6; }
.tile h3 { font-size: 28px; line-height: 1.14; font-weight: 600; letter-spacing: -0.02em; }
.tile > p { color: var(--ink-2); font-size: 17px; }
.tile .art { margin-top: auto; padding-top: 22px; }
.tile .quote { font-size: 21px; line-height: 1.45; font-weight: 600; letter-spacing: -0.015em; color: var(--ink); }
.tile .quote span { color: var(--up); }
.tile .ico { width: 44px; height: 44px; color: var(--blue); }

@media (max-width: 900px) {
  .tile, .tile.w2, .tile.w4 { grid-column: span 6; min-height: 0; }
  .tile { padding: 34px 28px 30px; border-radius: 24px; }
  .tile h3 { font-size: 24px; }
}

/* 拼贴格里的小插图 */
.tile .big-cell { font-size: clamp(56px, 7vw, 80px); line-height: 1; font-weight: 700; letter-spacing: -0.04em; font-variant-numeric: tabular-nums; }
.tile .big-cell sup { font-size: 0.32em; color: var(--sig); vertical-align: 1.6em; margin-left: 6px; letter-spacing: 0; }
.tile .mini-cap { font-size: 13px; color: var(--ink-3); margin-top: 8px; }
.waves { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; align-items: end; height: 150px; }
.waves div { display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 8px; height: 100%; }
.waves b { display: block; width: 100%; max-width: 64px; border-radius: 10px 10px 4px 4px; background: color-mix(in srgb, var(--blue) 28%, var(--tile)); }
.waves div:last-child b { background: var(--blue); }
.waves span { font-size: 13px; color: var(--ink-3); font-variant-numeric: tabular-nums; }
.waves em { font-style: normal; font-size: 15px; font-weight: 600; font-variant-numeric: tabular-nums; }
.waves em sup { color: var(--sig); font-size: 10px; margin-left: 2px; }
.specrows { display: grid; gap: 8px; font-size: 13px; font-variant-numeric: tabular-nums; }
.specrows div { display: grid; grid-template-columns: 54px 64px 1fr 44px; gap: 10px; padding: 9px 12px; border-radius: 10px; background: var(--bg); }
.sec.alt .specrows div { background: var(--bg-alt); }
.specrows span:nth-child(2) { color: var(--ink-3); }
.specrows .ok { color: var(--up); text-align: right; }
.vars { display: flex; flex-wrap: wrap; gap: 8px; }
.vars span { font-size: 13px; padding: 6px 12px; border-radius: 980px; background: var(--bg); color: var(--ink-2); }
.sec.alt .vars span { background: var(--bg-alt); }
.vars span b { color: var(--ink); font-weight: 600; margin-right: 6px; }
.weights { display: grid; gap: 10px; font-size: 13px; color: var(--ink-3); }
.weights div { display: grid; grid-template-columns: 52px 1fr 40px; align-items: center; gap: 10px; }
.weights i { display: block; height: 10px; border-radius: 6px; background: var(--line); }
.weights i.t { background: var(--blue); }

/* ───────── 步骤 ───────── */

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px; list-style: none; padding: 0; margin: 0; counter-reset: s; }
.steps li { counter-increment: s; }
.steps li::before {
  content: counter(s); display: grid; place-items: center; width: 36px; height: 36px; margin-bottom: 18px;
  border-radius: 50%; border: 1.5px solid var(--ink); font-weight: 600; font-size: 16px;
}
.steps h3 { font-size: 21px; font-weight: 600; letter-spacing: -0.015em; }
.steps p { margin-top: 8px; color: var(--ink-2); }
.steps code, .quote-say { font-family: inherit; background: var(--tile); padding: 1px 6px; border-radius: 6px; color: var(--ink); }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; gap: 36px; } }

/* ───────── 收尾号召 ───────── */

.closer { text-align: center; }
.closer h2 { font-size: clamp(34px, 5vw, 56px); line-height: 1.07; font-weight: 600; letter-spacing: -0.025em; }
.closer p { margin: 16px auto 0; max-width: 30em; color: var(--ink-2); font-size: 21px; }
.closer .actions { margin-top: 30px; }

/* ───────── 功能页：左右图文 ───────── */

.feature { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.feature + .feature { margin-top: 120px; }
.feature.flip .feature-art { order: -1; }
.feature h2 { font-size: clamp(30px, 4vw, 44px); line-height: 1.1; font-weight: 600; letter-spacing: -0.025em; }
.feature > div:not(.feature-art) > p { margin-top: 16px; color: var(--ink-2); font-size: 19px; line-height: 1.47; }
.feature ul { margin: 22px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.feature li { position: relative; padding-left: 22px; }
.feature li::before { content: ""; position: absolute; left: 2px; top: 0.72em; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.feature-art { background: var(--tile); border-radius: 28px; padding: 40px; min-height: 320px; display: flex; flex-direction: column; justify-content: center; }
.sec.alt .feature-art { background: var(--tile-on-alt); }
@media (max-width: 900px) {
  .feature { grid-template-columns: 1fr; gap: 32px; }
  .feature.flip .feature-art { order: 0; }
  .feature + .feature { margin-top: 80px; }
  .feature-art { padding: 28px; min-height: 0; }
}

.tool-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--hair); border-radius: 20px; overflow: hidden; }
.tool-list div { background: var(--bg); padding: 22px 24px; }
.sec.alt .tool-list div { background: var(--tile-on-alt); }
.tool-list b { display: block; font-weight: 600; font-size: 16px; }
.tool-list span { display: block; margin-top: 4px; color: var(--ink-2); font-size: 14px; line-height: 1.45; }
@media (max-width: 900px) { .tool-list { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .tool-list { grid-template-columns: 1fr; } }

/* ───────── 价格 ───────── */

.plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: stretch; }
.plan { background: var(--tile); border-radius: 28px; padding: 36px 30px 32px; display: flex; flex-direction: column; border: 2px solid transparent; }
.plan.pick { border-color: var(--blue); background: var(--bg); }
.plan .tag { font-size: 13px; font-weight: 600; color: var(--blue); min-height: 20px; }
.plan h3 { font-size: 26px; font-weight: 600; letter-spacing: -0.02em; margin-top: 6px; }
.plan .for { margin-top: 8px; color: var(--ink-2); font-size: 15px; min-height: 66px; }
.plan .price { margin-top: 22px; font-size: 40px; font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.plan .price small { font-size: 15px; font-weight: 400; color: var(--ink-2); letter-spacing: 0; margin-left: 4px; }
.plan .price.range { font-size: 30px; }
.plan .sub { margin-top: 6px; font-size: 13px; color: var(--ink-3); min-height: 40px; }
.plan ul { list-style: none; padding: 0; margin: 22px 0 28px; display: grid; gap: 10px; font-size: 15px; border-top: 1px solid var(--hair); padding-top: 22px; }
.plan li { position: relative; padding-left: 24px; }
.plan li::before {
  content: ""; position: absolute; left: 3px; top: 0.4em; width: 10px; height: 5px;
  border-left: 1.8px solid var(--blue); border-bottom: 1.8px solid var(--blue); transform: rotate(-45deg);
}
.plan li.no { color: var(--ink-3); }
.plan li.no::before { border: 0; height: 0; width: 9px; top: 0.75em; border-top: 1.6px solid var(--ink-3); transform: none; }
.plan .btn { margin-top: auto; width: 100%; }
.plans.two { grid-template-columns: 1fr 1fr; max-width: 760px; margin-inline: auto; }
.tile.who { min-height: 0; }
@media (max-width: 1080px) { .plans { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .plans { grid-template-columns: 1fr; } .plan .for, .plan .sub { min-height: 0; } }

.roi { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; text-align: center; }
.roi b { display: block; font-size: clamp(40px, 5vw, 56px); font-weight: 700; letter-spacing: -0.035em; line-height: 1.1; font-variant-numeric: tabular-nums; }
.roi p { margin-top: 10px; color: var(--ink-2); font-size: 16px; max-width: 18em; margin-inline: auto; }
@media (max-width: 760px) { .roi { grid-template-columns: 1fr; gap: 36px; } }

/* ───────── 常见问题 ───────── */

.faq { max-width: 760px; margin-inline: auto; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  list-style: none; cursor: pointer; padding: 24px 40px 24px 0; position: relative;
  font-size: 19px; font-weight: 600; letter-spacing: -0.015em;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after, .faq summary::before {
  content: ""; position: absolute; right: 8px; top: 50%; width: 14px; height: 1.6px; background: var(--ink-2);
  transition: transform 0.25s ease;
}
.faq summary::before { transform: rotate(90deg); }
.faq details[open] summary::before { transform: rotate(0deg); }
.faq details p { padding: 0 40px 24px 0; color: var(--ink-2); }

/* ───────── 下载 ───────── */

.picker { max-width: 860px; }
.pick-label { margin: 0 0 14px; font-size: 15px; font-weight: 600; color: var(--ink-2); text-align: center; }
.seg {
  display: flex; width: fit-content; margin: 0 auto 56px; padding: 4px; gap: 4px;
  background: var(--tile); border-radius: 980px;
}
.seg label {
  padding: 10px 26px; border-radius: 980px; cursor: pointer; font-size: 17px; color: var(--ink-2);
  transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}
#os-win:checked ~ .seg label[for="os-win"], #os-mac:checked ~ .seg label[for="os-mac"] {
  background: var(--bg); color: var(--ink); font-weight: 600; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}
#os-win:focus-visible ~ .seg label[for="os-win"], #os-mac:focus-visible ~ .seg label[for="os-mac"] { outline: 2px solid var(--blue); outline-offset: 2px; }
.picker .mac { display: none; }
#os-mac:checked ~ .dl-grid .win { display: none; }
#os-mac:checked ~ .dl-grid .dl-foot.mac { display: flex; }
#os-mac:checked ~ .dl-grid span.mac { display: inline; }

.dl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.dl {
  background: var(--tile); border-radius: 28px; padding: 40px;
  display: flex; flex-direction: column; gap: 10px; min-height: 300px;
}
.dl h3 { font-size: 32px; font-weight: 600; letter-spacing: -0.025em; line-height: 1.15; }
.dl p { color: var(--ink-2); font-size: 17px; }
.dl-foot { margin-top: auto; padding-top: 22px; display: flex; flex-direction: column; align-items: flex-start; gap: 10px; }
.dl-foot .file { font-size: 13px; color: var(--ink-3); word-break: break-all; }
.picker .hosts-note { margin-top: 22px; }
@media (max-width: 760px) {
  .dl-grid { grid-template-columns: 1fr; }
  .dl { padding: 30px 26px; min-height: 0; }
  .dl h3 { font-size: 26px; }
  .seg label { padding: 9px 18px; font-size: 15px; }
}

.notice {
  max-width: 760px; margin: 0 auto 56px; padding: 20px 24px; border-radius: 18px;
  background: var(--tile); color: var(--ink-2); font-size: 15px; text-align: center;
}
.notice b { color: var(--ink); font-weight: 600; }

.specs { max-width: 760px; margin-inline: auto; border-top: 1px solid var(--line); }
.specs div { display: grid; grid-template-columns: 200px 1fr; gap: 20px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.specs dt { font-weight: 600; }
.specs dd { margin: 0; color: var(--ink-2); }
@media (max-width: 560px) { .specs div { grid-template-columns: 1fr; gap: 4px; } }

.log { max-width: 760px; margin-inline: auto; display: grid; gap: 0; }
.log article { display: grid; grid-template-columns: 200px 1fr; gap: 20px; padding: 26px 0; border-top: 1px solid var(--line); }
.log h3 { font-size: 21px; font-weight: 600; }
.log time { display: block; color: var(--ink-3); font-size: 14px; margin-top: 2px; }
.log ul { margin: 0; padding-left: 1.1em; color: var(--ink-2); display: grid; gap: 6px; }
@media (max-width: 560px) { .log article { grid-template-columns: 1fr; gap: 10px; } }

/* ───────── 试用表单 ───────── */

.form-wrap { max-width: 640px; margin-inline: auto; }
.form { display: grid; gap: 18px; }
.form label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 8px; }
.form input, .form select, .form textarea {
  width: 100%; font: inherit; font-size: 17px; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 13px 16px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.sec.alt .form input, .sec.alt .form select, .sec.alt .form textarea { background: var(--tile-on-alt); }
.form textarea { resize: vertical; min-height: 110px; }
.form input:focus, .form select:focus, .form textarea:focus { outline: none; border-color: var(--blue); box-shadow: 0 0 0 4px color-mix(in srgb, var(--blue) 22%, transparent); }
.form .hint { margin-top: 6px; font-size: 13px; color: var(--ink-3); }
.form .btn { width: 100%; padding-block: 15px; margin-top: 6px; }
.form-foot { margin-top: 18px; text-align: center; font-size: 14px; color: var(--ink-3); }
.result { margin-top: 24px; }
.result .card { border-radius: 22px; padding: 30px; text-align: center; background: var(--tile); }
.result .card h3 { font-size: 22px; font-weight: 600; }
.result .card p { margin-top: 8px; color: var(--ink-2); font-size: 15px; }
.result .card img { width: 180px; height: 180px; border-radius: 14px; margin: 18px auto; }
.result .card.err { text-align: left; }
.result .card.err h3 { color: var(--sig); font-size: 18px; }
.result .card .actions { margin-top: 18px; }

.perks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 72px; }
.perks div { text-align: center; }
.perks svg { width: 36px; height: 36px; margin: 0 auto 12px; color: var(--blue); }
.perks b { display: block; font-size: 19px; font-weight: 600; }
.perks span { display: block; margin-top: 6px; color: var(--ink-2); font-size: 15px; }
@media (max-width: 760px) { .perks { grid-template-columns: 1fr; gap: 28px; } }

/* ───────── 关于 ───────── */

.story { max-width: 720px; margin-inline: auto; }
.story p { font-size: 21px; line-height: 1.6; color: var(--ink-2); }
.story p + p { margin-top: 24px; }
.story strong { color: var(--ink); font-weight: 600; }
.pull { max-width: 820px; margin-inline: auto; text-align: center; }
.pull blockquote { margin: 0; font-size: clamp(26px, 3.6vw, 40px); line-height: 1.3; font-weight: 600; letter-spacing: -0.02em; }
.pull figcaption { margin-top: 24px; color: var(--ink-2); font-size: 17px; }
.contact { display: flex; flex-wrap: wrap; justify-content: center; gap: 48px; align-items: center; }
.contact img { width: 160px; height: 160px; border-radius: 16px; }
.contact div { text-align: left; }
.contact b { display: block; font-size: 21px; font-weight: 600; }
.contact span { display: block; margin-top: 6px; color: var(--ink-2); }

/* ───────── 页脚 ───────── */

.foot { background: var(--bg-alt); color: var(--ink-2); font-size: 12px; line-height: 1.6; padding: 40px 0 28px; }
.sec.alt + .foot { border-top: 1px solid var(--hair); }
.foot-cols { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 28px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.foot-cols b { display: block; color: var(--ink); font-weight: 600; margin-bottom: 8px; font-size: 12px; }
.foot-cols ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; }
.foot a { color: var(--ink-2); }
.foot a:hover { color: var(--ink); }
.foot-legal { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding-top: 16px; color: var(--ink-3); }
@media (max-width: 620px) { .foot-cols { grid-template-columns: 1fr 1fr; } .foot-cols > div:first-child { grid-column: span 2; } }

/* ───────── 动效 ───────── */
/* 没有脚本或者用户关闭了动态效果时，内容直接显示 */

@media (prefers-reduced-motion: no-preference) {
  .hero .kicker, .hero h1, .hero .lede, .hero .actions,
  .page-hero h1, .page-hero .lede, .page-hero .actions {
    animation: enter 1.1s cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .hero h1, .page-hero .lede { animation-delay: 0.08s; }
  .hero .lede, .page-hero .actions { animation-delay: 0.16s; }
  .hero .actions { animation-delay: 0.24s; }
  @keyframes enter { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }

  html.js [data-reveal] {
    opacity: 0; transform: translateY(48px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1.1s cubic-bezier(0.16, 1, 0.3, 1);
  }
  html.js [data-reveal].in { opacity: 1; transform: none; }

  html.js [data-stagger] > * {
    opacity: 0; transform: translateY(48px);
    transition: opacity 0.9s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
  }
  html.js [data-stagger].in > * { opacity: 1; transform: none; }
  html.js [data-stagger].in > :nth-child(2) { transition-delay: 0.08s; }
  html.js [data-stagger].in > :nth-child(3) { transition-delay: 0.16s; }
  html.js [data-stagger].in > :nth-child(4) { transition-delay: 0.24s; }
  html.js [data-stagger].in > :nth-child(5) { transition-delay: 0.32s; }
  html.js [data-stagger].in > :nth-child(6) { transition-delay: 0.40s; }
  html.js [data-stagger].in > :nth-child(n+7) { transition-delay: 0.48s; }

  /* 支持的 AI 工具：名字依次由浅变深 */
  html.js .hosts[data-stagger] > * { transform: none; opacity: 0.18; transition: opacity 0.9s ease; }
  html.js .hosts[data-stagger].in > * { opacity: 1; }

  /* 首屏产品图随滚动放大 */
  html.js .stage .shot { transform: scale(var(--zoom, 0.9)); transform-origin: 50% 0; will-change: transform; }

  /* 小插图：柱子生长、加权条收到目标值 */
  html.js .waves b { transform: scaleY(0); transform-origin: 50% 100%; transition: transform 1.2s cubic-bezier(0.16, 1, 0.3, 1); }
  html.js .in .waves b, html.js .waves.in b { transform: none; }
  html.js .in .waves div:nth-child(2) b, html.js .waves.in div:nth-child(2) b { transition-delay: 0.12s; }
  html.js .in .waves div:nth-child(3) b, html.js .waves.in div:nth-child(3) b { transition-delay: 0.24s; }
  html.js .weights i.t { width: 55% !important; transition: width 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.4s; }
  html.js .in .weights i.t { width: 50% !important; }
}