/* 小录小录公开营销页：静态 HTML 共用。家音暖纸，言脉冷蓝，形状与全站一致。 */
:root {
  --paper-0: #fcf9f4;
  --paper-1: #fffdf7;
  --paper-2: #f3ecdc;
  --ink-0: #2b241c;
  --ink-1: #4a4034;
  --ink-2: #6b5d4f;
  --brand: #96662a;
  --brand-deep: #7a5320;
  --brand-tint: #f0e6d2;
  --seal: #c04851;
  --line: #ddd2bc;
  --line-strong: #c9bb9e;
  --shadow: 0 12px 40px rgba(74, 58, 35, .12);
  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 88px; }
body {
  margin: 0; background: var(--paper-0); color: var(--ink-0);
  font-family: var(--font-sans); font-size: 16px; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body.mkt-biz {
  --paper-0: #f4f7fb;
  --paper-1: #ffffff;
  --paper-2: #eaf0f7;
  --ink-0: #12233c;
  --ink-1: #33475f;
  --ink-2: #5b6b80;
  --brand: #0369a1;
  --brand-deep: #025481;
  --brand-tint: #e0f0fa;
  --seal: #0284c7;
  --line: #d8e0ea;
  --line-strong: #bfcddd;
  --shadow: 0 12px 40px rgba(18, 42, 74, .12);
}
img { display: block; max-width: 100%; }
a { color: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--brand); outline-offset: 5px; border-radius: 4px;
}
.mkt-container { width: 92%; max-width: 1200px; margin: 0 auto; }
.mkt-nav {
  position: sticky; top: 0; z-index: 20; height: 72px;
  background: var(--paper-0); background: color-mix(in srgb, var(--paper-0) 92%, transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.mkt-nav-inner { height: 100%; display: flex; align-items: center; gap: 24px; }
.mkt-brand { display: flex; align-items: center; gap: 11px; text-decoration: none; flex: none; }
.mkt-brand img { width: 38px; height: 38px; }
.mkt-brand-name { font-family: var(--font-serif); font-size: 23px; font-weight: 600; letter-spacing: 3px; }
.mkt-brand-sub { padding-left: 12px; border-left: 1px solid var(--line-strong); color: var(--ink-2); font-size: 13px; }
.mkt-links { margin-left: auto; display: flex; align-items: center; gap: 26px; }
.mkt-links a { color: var(--ink-1); font-size: 14px; text-decoration: none; white-space: nowrap; }
.mkt-links a:hover { color: var(--brand-deep); }
.mkt-links .mkt-nav-cta {
  padding: 9px 20px; border: 1px solid var(--brand); border-radius: 999px;
  color: var(--brand-deep); font-weight: 600;
}
.mkt-links .mkt-nav-cta:hover { background: var(--brand-deep); border-color: var(--brand-deep); color: var(--paper-1); }

/* 首屏只回答“这是什么、对我有什么用、下一步做什么”。 */
.mkt-hero {
  min-height: calc(100vh - 72px); min-height: calc(100dvh - 72px);
  display: grid; grid-template-columns: 1.05fr .95fr; align-items: center;
  gap: 56px; padding: 44px 0 52px;
}
.mkt-hero-copy { max-width: 610px; }
.mkt-eyebrow { margin: 0 0 18px; color: var(--brand-deep); font-size: 14px; font-weight: 600; letter-spacing: 2px; }
.mkt-hero h1 {
  margin: 0; font-family: var(--font-serif); font-weight: 900;
  font-size: 52px; font-size: clamp(42px, 3.65vw, 52px); line-height: 1.34; letter-spacing: .01em;
}
.mkt-hero h1 span { display: block; }
.mkt-hero-sub { margin: 22px 0 0; max-width: 34em; color: var(--ink-1); font-size: 18px; line-height: 1.85; }
.mkt-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.mkt-btn {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px;
  padding: 12px 26px; border: 1px solid var(--brand-deep); border-radius: 999px;
  font-size: 16px; font-weight: 600; line-height: 1.4; text-decoration: none;
  white-space: nowrap; transition: transform .12s ease-out, background .16s ease-out, color .16s ease-out;
}
.mkt-btn-primary { background: var(--brand-deep); color: #fffdf7; }
.mkt-btn-primary:hover { background: var(--ink-0); border-color: var(--ink-0); }
.mkt-btn-secondary { background: transparent; color: var(--brand-deep); border-color: var(--line-strong); }
.mkt-btn-secondary:hover { border-color: var(--brand-deep); background: var(--brand-tint); }
.mkt-btn:active { transform: translateY(1px); }
.mkt-hero-figure { margin: 0; min-width: 0; }
.mkt-hero-figure img {
  width: 100%; height: auto; max-height: 650px; aspect-ratio: 4 / 4.6; object-fit: cover;
  object-position: center 52%; border-radius: 16px; box-shadow: var(--shadow);
}
.mkt-biz .mkt-hero-figure img { object-position: center 55%; }
.mkt-hero-figure figcaption { margin-top: 9px; color: var(--ink-2); font-size: 12px; text-align: right; }

.mkt-section { padding: 88px 0; }
.mkt-section-tint { background: var(--paper-2); }
.mkt-section-head { max-width: 780px; margin-bottom: 38px; }
.mkt-section-head h2, .mkt-trust h2, .mkt-final h2 {
  margin: 0; font-family: var(--font-serif); font-size: 34px; line-height: 1.45; font-weight: 600;
}
.mkt-section-head p { margin: 14px 0 0; color: var(--ink-2); font-size: 17px; line-height: 1.85; }
.mkt-demo-note { margin: 0 0 18px; color: var(--ink-2); font-size: 14px; }
.mkt-demo-note strong { color: var(--ink-1); }

/* 真实书页组件，不是截图；所有文字在首屏上方明确标成虚构样稿。 */
.mkt-demo-book {
  display: grid; grid-template-columns: .84fr 1.16fr; max-width: 1060px; margin: 0 auto;
  overflow: hidden; border: 1px solid var(--line); border-radius: 16px;
  background: var(--paper-1); box-shadow: var(--shadow);
}
.mkt-demo-cover {
  min-height: 570px; padding: 48px 32px; border-right: 1px solid var(--line);
  background: var(--brand-tint); display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
}
.mkt-demo-cover-logo { width: 52px; height: 52px; margin-bottom: 30px; }
.mkt-demo-cover-kind { color: var(--ink-2); font-size: 13px; letter-spacing: 3px; }
.mkt-demo-cover h3 { margin: 20px 0 12px; font-family: var(--font-serif); font-size: 36px; line-height: 1.45; }
.mkt-demo-cover-person { color: var(--brand-deep); font-family: var(--font-serif); letter-spacing: 3px; }
.mkt-demo-seal {
  display: grid; place-items: center; width: 50px; height: 50px; margin-top: 32px;
  border-radius: 6px; background: var(--seal); color: #fffdf7;
  font-family: var(--font-serif); font-size: 25px; transform: rotate(-4deg);
  box-shadow: inset 0 0 0 2px rgba(255, 253, 247, .35);
}
.mkt-demo-cover-foot { margin-top: 34px; color: var(--ink-2); font-size: 12px; }
.mkt-demo-page { padding: 46px 52px; }
.mkt-demo-chapter { color: var(--brand-deep); font-size: 13px; letter-spacing: 2px; }
.mkt-demo-page h3 { margin: 10px 0 20px; font-family: var(--font-serif); font-size: 27px; font-weight: 600; }
.mkt-demo-page p { font-family: var(--font-serif); font-size: 17px; line-height: 2; text-align: justify; }
.mkt-demo-timeline { margin-top: 26px; padding-top: 20px; border-top: 1px dashed var(--line-strong); }
.mkt-demo-timeline h4 { margin: 0 0 12px; font-family: var(--font-serif); font-size: 18px; }
.mkt-demo-time-row { display: grid; grid-template-columns: 62px 1fr; gap: 14px; padding: 7px 0; font-size: 14px; }
.mkt-demo-time-row b { color: var(--brand-deep); font-family: var(--font-serif); font-weight: 600; }
.mkt-demo-time-row span { color: var(--ink-2); }

/* 使用步骤用内容本身做标题，不写 Stage / Step 之类的空标签。 */
.mkt-steps { border-top: 1px solid var(--line-strong); }
.mkt-step {
  display: grid; grid-template-columns: minmax(250px, .8fr) 1.2fr; gap: 48px;
  padding: 28px 0; border-bottom: 1px solid var(--line);
}
.mkt-step h3 { margin: 0; font-family: var(--font-serif); font-size: 22px; line-height: 1.55; font-weight: 600; }
.mkt-step p { margin: 0; color: var(--ink-2); line-height: 1.85; }

/* 言脉的原答到主题演示：是说明内容关系的组件，不冒充客户项目或产品截图。 */
.mkt-trace { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.mkt-trace-panel { padding: 30px; border: 1px solid var(--line); border-radius: 16px; background: var(--paper-1); }
.mkt-trace-label { color: var(--brand-deep); font-size: 13px; font-weight: 600; letter-spacing: 1px; }
.mkt-trace-panel h3 { margin: 12px 0 18px; font-family: var(--font-serif); font-size: 21px; line-height: 1.55; }
.mkt-trace-panel p { color: var(--ink-1); line-height: 1.9; }
.mkt-trace-source { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); color: var(--ink-2); font-size: 13px; }
.mkt-trace-theme { padding: 12px 0; border-bottom: 1px solid var(--line); }
.mkt-trace-theme:last-of-type { border-bottom: 0; }
.mkt-trace-theme b { display: block; margin-bottom: 5px; }
.mkt-trace-theme span { color: var(--ink-2); font-size: 14px; }

.mkt-usecases { border-top: 1px solid var(--line-strong); }
.mkt-usecase { display: grid; grid-template-columns: .7fr 1.3fr; gap: 44px; padding: 24px 0; border-bottom: 1px solid var(--line); }
.mkt-usecase h3 { margin: 0; font-family: var(--font-serif); font-size: 21px; font-weight: 600; }
.mkt-usecase p { margin: 0; color: var(--ink-2); line-height: 1.85; }

.mkt-trust { display: grid; grid-template-columns: .9fr 1.1fr; gap: 64px; align-items: start; }
.mkt-trust-intro { margin: 16px 0 0; color: var(--ink-2); line-height: 1.85; }
.mkt-trust-list { border-top: 1px solid var(--line-strong); }
.mkt-trust-item { padding: 18px 0; border-bottom: 1px solid var(--line); }
.mkt-trust-item strong { display: block; margin-bottom: 5px; color: var(--ink-0); }
.mkt-trust-item span { color: var(--ink-2); line-height: 1.75; }

.mkt-faq { border-top: 1px solid var(--line-strong); }
.mkt-faq details { border-bottom: 1px solid var(--line); }
.mkt-faq summary {
  position: relative; padding: 22px 44px 22px 0; cursor: pointer;
  font-family: var(--font-serif); font-size: 20px; font-weight: 600; list-style: none;
}
.mkt-faq summary::-webkit-details-marker { display: none; }
.mkt-faq summary::after { content: "+"; position: absolute; right: 8px; top: 20px; color: var(--brand-deep); font-family: var(--font-sans); font-size: 24px; font-weight: 400; }
.mkt-faq details[open] summary::after { content: "−"; }
.mkt-faq details p { margin: 0; padding: 0 44px 24px 0; color: var(--ink-2); line-height: 1.9; }

.mkt-final { padding: 64px 0; background: var(--brand-tint); }
.mkt-final-inner { display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.mkt-final p { margin: 10px 0 0; color: var(--ink-2); }
.mkt-final .mkt-btn { flex: none; }
.mkt-contact { margin-top: 22px; }
.mkt-contact-label { color: var(--ink-2); font-size: 13px; }
.mkt-contact-wx { display: block; margin: 4px 0; color: var(--brand-deep); font-size: 28px; font-weight: 700; letter-spacing: 2px; font-variant-numeric: tabular-nums; }
.mkt-contact-hint { color: var(--ink-2); font-size: 13px; }

.mkt-breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; padding-top: 12px; color: var(--ink-2); font-size: 13px; }
.mkt-breadcrumb a { color: var(--brand-deep); text-decoration: none; }
.mkt-breadcrumb a:hover { text-decoration: underline; text-underline-offset: 3px; }

.mkt-footer { padding: 24px 0; border-top: 1px solid var(--line); }
.mkt-footer-inner { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 24px; color: var(--ink-2); font-size: 13px; }
.mkt-footer-brand { color: var(--ink-0); font-family: var(--font-serif); font-size: 16px; }
.mkt-footer-links { margin-left: auto; display: flex; flex-wrap: wrap; gap: 20px; }
.mkt-footer a { text-decoration: none; }
.mkt-footer a:hover { color: var(--brand-deep); text-decoration: underline; text-underline-offset: 4px; }

@media (max-width: 1100px) {
  .mkt-hero { gap: 36px; }
  .mkt-hero h1 { font-size: 42px; font-size: clamp(34px, 3.8vw, 42px); }
  .mkt-brand-sub { display: none; }
  .mkt-links { gap: 20px; }
}
@media (max-width: 900px) {
  .mkt-nav { height: 64px; }
  .mkt-links > a:not(.mkt-nav-cta) { display: none; }
  .mkt-hero {
    min-height: 0; grid-template-columns: 1fr; gap: 32px; padding: 36px 0 44px;
  }
  .mkt-hero-copy { max-width: 680px; }
  .mkt-hero h1 { font-size: 38px; }
  .mkt-hero-figure { max-width: 640px; }
  .mkt-hero-figure img { max-height: none; aspect-ratio: 16 / 10; object-position: center 58%; }
  .mkt-section { padding: 64px 0; }
  .mkt-section-head h2, .mkt-trust h2, .mkt-final h2 { font-size: 29px; }
  .mkt-demo-book { grid-template-columns: 1fr; }
  .mkt-demo-cover { min-height: 360px; border-right: 0; border-bottom: 1px solid var(--line); }
  .mkt-demo-page { padding: 34px; }
  .mkt-step, .mkt-usecase { grid-template-columns: 1fr; gap: 10px; }
  .mkt-trace, .mkt-trust { grid-template-columns: 1fr; gap: 32px; }
  .mkt-final-inner { align-items: flex-start; flex-direction: column; gap: 24px; }
  .mkt-footer-links { margin-left: 0; }
}
@media (max-width: 480px) {
  .mkt-container { width: 90%; }
  .mkt-nav-inner { gap: 12px; }
  .mkt-brand { gap: 8px; }
  .mkt-brand img { width: 32px; height: 32px; }
  .mkt-brand-name { font-size: 20px; letter-spacing: 2px; }
  .mkt-links .mkt-nav-cta { padding: 8px 14px; font-size: 13px; }
  .mkt-hero { padding-top: 30px; }
  .mkt-eyebrow { margin-bottom: 14px; font-size: 13px; }
  .mkt-hero h1 { font-size: 31px; line-height: 1.42; }
  .mkt-hero-sub { margin-top: 18px; font-size: 16px; }
  .mkt-actions { margin-top: 24px; }
  .mkt-btn { min-height: 46px; padding: 11px 21px; font-size: 15px; }
  .mkt-hero-figure img { aspect-ratio: 4 / 3; }
  .mkt-section-head { margin-bottom: 28px; }
  .mkt-section-head h2, .mkt-trust h2, .mkt-final h2 { font-size: 26px; }
  .mkt-section-head p { font-size: 16px; }
  .mkt-demo-cover { min-height: 330px; padding: 36px 24px; }
  .mkt-demo-cover h3 { font-size: 30px; }
  .mkt-demo-page { padding: 28px 24px; }
  .mkt-demo-page h3 { font-size: 24px; }
  .mkt-demo-page p { font-size: 16px; }
  .mkt-step h3 { font-size: 20px; }
  .mkt-trace-panel { padding: 24px; }
  .mkt-contact-wx { font-size: 25px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .mkt-btn { transition: none; }
}

@font-face {
  font-family: "Vazirmatn";
  src: url("vazirmatn-arabic-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0600-06FF, U+0750-077F, U+0870-088E, U+0890-0891, U+0898-08E1, U+08A0-08FF, U+200C-200E, U+2010-2011, U+204F, U+2E41, U+FB50-FDFF, U+FE70-FEFF;
}
@font-face {
  font-family: "Vazirmatn";
  src: url("vazirmatn-latin-wght-normal.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
  unicode-range: U+0000-00FF, U+2000-206F, U+20A0-20CF, U+2100-214F;
}
html[dir="rtl"] body { font-family: "Vazirmatn", Tahoma, Arial, sans-serif; letter-spacing: normal; }
html[dir="rtl"] :where(h1, h2, h3, h4, .mkt-brand-name, .mkt-footer-brand, .mkt-demo-page p, .mkt-step h3, .mkt-usecase h3, .mkt-faq summary) { font-family: "Vazirmatn", Tahoma, Arial, sans-serif; letter-spacing: normal; }
html[dir="rtl"] :where(.mkt-eyebrow, .mkt-brand-name, .mkt-demo-cover-kind, .mkt-demo-cover-person, .mkt-demo-chapter, .mkt-trace-label, .mkt-contact-wx) { letter-spacing: normal; }
html[dir="rtl"] .mkt-brand-sub { padding-left: 0; border-left: 0; padding-inline-start: 12px; border-inline-start: 1px solid var(--line-strong); }
html[dir="rtl"] .mkt-links, html[dir="rtl"] .mkt-footer-links { margin-left: 0; margin-inline-start: auto; }
html[dir="rtl"] .mkt-hero-figure figcaption { text-align: start; }
html[dir="rtl"] .mkt-demo-cover { border-right: 0; border-inline-end: 1px solid var(--line); }
html[dir="rtl"] .mkt-faq summary { padding: 22px 0; padding-inline-end: 44px; }
html[dir="rtl"] .mkt-faq summary::after { right: auto; inset-inline-end: 8px; }
html[dir="rtl"] .mkt-faq details p { padding: 0 0 24px; padding-inline-end: 44px; }
html[dir="rtl"] .mkt-contact-wx, html[dir="rtl"] .mkt-contact-hint { direction: ltr; unicode-bidi: isolate; text-align: right; }
@media (max-width: 900px) {
  html[dir="rtl"] .mkt-demo-cover { border-inline-end: 0; }
  html[dir="rtl"] .mkt-footer-links { margin-inline-start: 0; }
}