:root {
  --bg: #ffffff;
  --warm: #fffaf4;
  --blue-soft: #f4f8ff;
  --ink: #111827;
  --body: #25324a;
  --muted: #64748b;
  --line: #e6eaf2;
  --blue: #0b4aa2;
  --blue-light: #6b9df7;
  --orange: #f2a46d;
  --orange-deep: #c9783e;
  --green: #46aa95;
  --shadow: 0 24px 70px rgba(65, 91, 135, .14);
  --radius: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; scroll-padding-top: 110px; }
[id] { scroll-margin-top: 110px; }
body {
  margin: 0;
  color: var(--body);
  background: var(--bg);
  overflow-x: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.section-shell { width: min(1240px, calc(100% - 48px)); margin: 0 auto; }
.site-header {
  position: fixed; z-index: 50; top: 16px; left: 24px; right: 24px;
  display: flex; align-items: center; justify-content: space-between;
  min-height: 64px; padding: 10px 12px 10px 16px;
  border: 1px solid rgba(230, 233, 239, .78); border-radius: 22px;
  background: rgba(255,255,255,.9); box-shadow: 0 18px 40px rgba(77,92,119,.1); backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; min-width: 42px; height: 42px; }
.brand > img:first-child { width: 42px; height: 42px; object-fit: contain; flex: 0 0 auto; }
.brand-wordmark { width: 86px; height: 34px; object-fit: contain; object-position: left center; }
.nav-links { display: flex; align-items: center; gap: 28px; color: var(--muted); font-size: 14px; }
.nav-links a, .nav-cta, .button, .problem-grid a, .knowledge-grid a, .related-links a { cursor: pointer; transition: color .18s, background .18s, border-color .18s, box-shadow .18s; }
.nav-links a:hover { color: var(--ink); }
.nav-links a[aria-current="page"] { color: var(--blue); font-weight: 800; }
.nav-links a[aria-current="page"]::after {
  content: ""; display: block; width: 100%; height: 2px; margin-top: 6px; border-radius: 999px; background: var(--orange);
}
.nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; border-radius: 16px; font-weight: 700; }
.nav-cta { padding: 0 18px; color: #fff; background: var(--orange); font-size: 14px; box-shadow: 0 12px 28px rgba(242,164,109,.28); }
.mobile-menu-toggle, .mobile-menu, .mobile-menu-backdrop { display: none; }
.mobile-menu-toggle:focus-visible, .button:focus-visible, .nav-cta:focus-visible, .mobile-cta-bar a:focus-visible, .related-links a:focus-visible {
  outline: 3px solid rgba(107,157,247,.42); outline-offset: 3px;
}
.button { min-height: 52px; padding: 0 24px; border: 1px solid transparent; font-size: 16px; }
.button.primary { color: #fff; background: var(--orange); box-shadow: 0 18px 36px rgba(242,164,109,.28); }
.button.secondary { color: var(--orange-deep); background: #fff4ea; border-color: #f4d2b6; }
.button:hover, .nav-cta:hover { box-shadow: 0 18px 36px rgba(242,164,109,.34); }
.hero { display: flex; flex-direction: column; align-items: center; gap: 24px; min-height: 760px; padding-top: 122px; padding-bottom: 74px; }
.hero-copy { display: contents; }
.hero-copy h1, .section-heading h2, .page-hero h1, .article-hero h1, .final-cta h2, .related-section h2 {
  margin: 0; color: var(--ink); line-height: 1.1; letter-spacing: 0; text-wrap: balance; word-break: keep-all;
}
.hero-copy h1 { order: 1; text-align: center; font-size: clamp(42px, 4.1vw, 60px); max-width: 980px; }
.hero-copy h1 span { display: block; }
.title-line-mobile { display: none !important; }
.heading-mobile { display: none !important; }
.heading-line { display: block; }
.hero-copy p, .page-hero p, .article-hero p, .section-heading p, .lead { color: #4b5563; font-size: 19px; line-height: 1.78; }
.hero-copy p { order: 3; max-width: 780px; margin: 0; text-align: center; }
.hero-actions { order: 4; display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 4px; }
.hero-proof { order: 5; display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; width: min(100%, 700px); margin: 8px 0 0; }
.hero-proof div, .problem-grid a, .knowledge-grid a, .compare-card, .proof-shot, .faq-list details, .related-links a {
  border: 1px solid var(--line); background: rgba(255,255,255,.86); box-shadow: 0 18px 52px rgba(82,101,138,.08); border-radius: var(--radius);
}
.hero-proof div { padding: 18px; }
.hero-proof dt { color: var(--ink); font-size: 24px; font-weight: 800; }
.hero-proof dd { margin: 6px 0 0; color: var(--muted); font-size: 13px; }
.hero-evidence { order: 2; position: relative; width: min(100%, 980px); display: grid; place-items: center; background: radial-gradient(circle at 30% 18%, #eaf2ff, transparent 42%), radial-gradient(circle at 82% 80%, #ecf8f4, transparent 34%); }
.hero-scene { min-height: auto; padding: 18px; border-radius: 34px; }
.hero-scene .scene-scroll { width: 100%; }
.hero-scene .scene-banner { border-radius: 24px; }
.proof-shot { margin: 0; overflow: hidden; background: #fff; }
.image-zoom-trigger { display: block; width: 100%; height: 100%; padding: 0; border: 0; background: transparent; cursor: zoom-in; }
.image-zoom-trigger:focus-visible { outline: 3px solid rgba(107,157,247,.42); outline-offset: 4px; border-radius: inherit; }
.proof-shot img { display: block; width: 100%; height: 100%; object-fit: cover; object-position: top center; image-rendering: auto; }
.scene-section { padding: 10px 0 88px; }
.scene-section + .section-band { margin-top: -18px; }
.page-hero + .scene-section, .article-hero + .scene-section { padding-top: 0; padding-bottom: 64px; }
.scene-scroll { width: 100%; overflow-x: visible; }
.scene-scroll::-webkit-scrollbar { display: none; }
.scene-banner { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 28px; background: #fff8ef; box-shadow: 0 24px 70px rgba(82,101,138,.10); }
.scene-banner img { display: block; width: 100%; height: auto; image-rendering: auto; }
.section-band { padding: 104px 0; background: var(--blue-soft); }
.section-band.warm { background: var(--warm); }
.split, .proof-layout, .compare-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 72px; align-items: center; }
.section-heading { max-width: 820px; }
.section-heading h2, .final-cta h2, .related-section h2 { font-size: clamp(30px, 3.6vw, 48px); }
.problem-grid, .knowledge-grid, .flow-grid, .evidence-grid { display: grid; gap: 18px; }
.problem-grid { grid-template-columns: repeat(4, 1fr); margin-top: 48px; }
.problem-grid a, .knowledge-grid a { padding: 26px; }
.problem-grid strong, .knowledge-grid strong { display: block; color: var(--ink); font-size: 20px; line-height: 1.35; }
.problem-grid span, .knowledge-grid span { display: block; color: var(--blue-light); font-size: 14px; font-weight: 800; margin-bottom: 12px; }
.problem-grid a span { color: var(--muted); margin: 12px 0 0; font-weight: 500; }
.knowledge-grid em { display: block; margin-top: 18px; color: var(--muted); font-size: 13px; font-style: normal; }
.flow-section, .faq-section, .related-section { padding: 106px 0; }
.flow-grid { grid-template-columns: repeat(4, 1fr); margin-top: 46px; }
.flow-grid article { position: relative; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(255,255,255,.9); }
.flow-grid article:not(:last-child)::after {
  content: ""; position: absolute; top: 42px; right: -18px; width: 18px; height: 2px;
  background: linear-gradient(90deg, var(--orange), transparent);
}
.flow-grid span { color: var(--orange); font-weight: 800; }
.flow-grid h3 { margin: 20px 0 10px; color: var(--ink); font-size: 21px; }
.flow-grid p, .knowledge-grid p, .check-list, .article-body li, .article-body p { color: var(--muted); line-height: 1.76; }
.flow-rail {
  position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 18px; padding: 18px 0 0;
  color: var(--blue); font-size: 14px; font-weight: 800;
}
.flow-rail::before {
  content: ""; position: absolute; top: 0; left: 8%; right: 8%; height: 3px; border-radius: 999px;
  background: linear-gradient(90deg, var(--orange), var(--blue-light), var(--green));
}
.flow-rail span { text-align: center; }
.proof-stack { position: relative; min-height: 620px; }
.proof-stack .large { width: 330px; height: 620px; border-radius: 42px; padding: 12px; }
.proof-stack .large img { border-radius: 32px; }
.proof-stack .small { position: absolute; right: 0; bottom: 40px; width: 230px; height: 410px; border-radius: 34px; padding: 10px; }
.proof-stack.cards .small { bottom: 20px; }
.reverse { grid-template-columns: 1fr .9fr; }
.check-list { padding-left: 20px; }
.quote { color: var(--blue); font-size: 26px; font-weight: 800; }
.knowledge-grid { grid-template-columns: repeat(3, 1fr); padding-bottom: 100px; }
.compare-card { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 18px; }
.compare-card div { padding: 24px; border-radius: 18px; background: #fff; }
.compare-card span { color: var(--blue); font-weight: 800; }
.compare-card p { color: var(--muted); line-height: 1.7; }
.faq-list { display: grid; gap: 12px; margin-top: 32px; }
.faq-list details { padding: 20px 24px; }
.faq-list summary { color: var(--ink); font-weight: 750; cursor: pointer; }
.faq-list p { color: var(--muted); line-height: 1.75; }
.text-link { display: inline-flex; margin-top: 24px; color: var(--orange-deep); font-weight: 750; }
.final-cta { padding: 96px 0 112px; background: radial-gradient(circle at 20% 0%, #eaf2ff 0, transparent 34%), radial-gradient(circle at 80% 32%, #ecf8f4 0, transparent 36%), #fff; }
.cta-inner { display: grid; justify-items: center; text-align: center; }
.cta-inner img { width: 86px; height: 86px; border-radius: 24px; box-shadow: 0 16px 34px rgba(83,105,146,.14); }
.cta-inner h2 { max-width: 840px; margin-top: 26px; }
.cta-inner p { color: var(--muted); font-size: 18px; line-height: 1.72; }
.site-footer { padding: 42px 0; border-top: 1px solid var(--line); background: #fff; }
.footer-grid { display: grid; grid-template-columns: minmax(240px,.85fr) minmax(0,1.4fr); gap: 48px; align-items: start; color: var(--muted); }
.footer-grid img { width: 104px; height: 44px; object-fit: contain; object-position: left center; }
.footer-columns { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 28px; }
.footer-columns nav { display: grid; gap: 10px; font-size: 14px; }
.footer-columns h2 { margin: 0 0 6px; color: var(--ink); font-size: 15px; }
.company-info, .beian-info { margin: 8px 0 0; font-size: 13px; }
.beian-info a { color: var(--muted); }
.beian-info a:hover { color: var(--blue); }
.mobile-cta-bar { display: none; }
.qr-modal[hidden] { display: none; }
.qr-modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 24px; }
.qr-modal__backdrop { position: absolute; inset: 0; border: 0; background: rgba(17,24,39,.32); backdrop-filter: blur(10px); cursor: pointer; }
.qr-dialog {
  position: relative; z-index: 1; width: min(420px, calc(100vw - 48px)); padding: 30px 30px 32px;
  border: 1px solid rgba(230,233,239,.9); border-radius: 28px; background: rgba(255,255,255,.96);
  box-shadow: 0 28px 80px rgba(15,23,42,.2); text-align: center;
}
.qr-dialog img { display: block; width: min(260px, 70vw); height: auto; margin: 0 auto 18px; border-radius: 18px; }
.qr-dialog h2 { margin: 0; color: var(--ink); font-size: 25px; line-height: 1.25; }
.qr-dialog p { margin: 12px auto 0; max-width: 320px; color: var(--muted); line-height: 1.7; }
.qr-close {
  position: absolute; top: 12px; right: 12px; width: 36px; height: 36px; border: 1px solid var(--line);
  border-radius: 999px; background: #fff; color: var(--muted); font-size: 24px; line-height: 1; cursor: pointer;
}
.qr-close:hover { color: var(--ink); background: var(--warm); }
.image-modal[hidden] { display: none; }
.image-modal { position: fixed; inset: 0; z-index: 110; display: grid; place-items: center; padding: 24px; }
.image-modal__backdrop { position: absolute; inset: 0; border: 0; background: rgba(17,24,39,.58); backdrop-filter: blur(10px); cursor: zoom-out; }
.image-dialog {
  position: relative; z-index: 1; width: min(1040px, calc(100vw - 32px)); max-height: calc(100vh - 48px);
  display: grid; place-items: center; padding: 14px; border: 1px solid rgba(230,233,239,.9);
  border-radius: 28px; background: rgba(255,255,255,.98); box-shadow: 0 28px 90px rgba(15,23,42,.3);
}
.image-dialog img { display: block; width: auto; max-width: 100%; max-height: calc(100vh - 96px); border-radius: 18px; object-fit: contain; }
.image-close {
  position: absolute; top: 12px; right: 12px; z-index: 2; width: 40px; height: 40px; border: 1px solid var(--line);
  border-radius: 999px; background: rgba(255,255,255,.92); color: var(--muted); font-size: 26px; line-height: 1; cursor: pointer;
}
.image-close:hover { color: var(--ink); background: var(--warm); }
.page-hero, .article-hero { padding-top: 150px; padding-bottom: 72px; }
.page-hero h1, .article-hero h1 { font-size: clamp(40px, 5vw, 68px); max-width: 900px; }
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 24px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--blue); }
.cluster-label { display: inline-flex; margin-bottom: 20px; color: var(--orange-deep); font-weight: 800; }
.article-evidence { padding: 12px 0 70px; }
.product-proof { margin-top: -24px; padding-bottom: 82px; }
.evidence-grid { grid-template-columns: repeat(4, 1fr); align-items: start; margin-top: 34px; }
.evidence-grid.three { grid-template-columns: repeat(3, 1fr); }
.evidence-grid .proof-shot { height: 420px; border-radius: 34px; padding: 10px; }
.evidence-grid .proof-shot img { border-radius: 24px; }
.article-body { max-width: 860px; padding-bottom: 80px; }
.article-body h1 { margin: 54px 0 18px; color: var(--ink); font-size: 34px; line-height: 1.22; }
.article-body h2 { margin: 42px 0 14px; color: var(--ink); font-size: 26px; line-height: 1.28; }
.article-body h3 { margin: 30px 0 12px; color: var(--ink); font-size: 22px; }
.article-body p { font-size: 18px; }
.article-body blockquote { margin: 30px 0; padding: 22px 26px; border-left: 4px solid var(--orange); border-radius: 18px; background: var(--warm); color: var(--ink); font-size: 19px; line-height: 1.8; }
.article-body code { padding: 2px 6px; border-radius: 6px; background: #f1f5f9; }
.article-body table { display: block; width: 100%; overflow-x: auto; border-collapse: collapse; }
.article-body th, .article-body td { min-width: 140px; padding: 12px; border: 1px solid var(--line); text-align: left; }
.article-layout { display: grid; grid-template-columns: 230px minmax(0, 860px); gap: 52px; align-items: start; padding-bottom: 80px; }
.article-layout .article-body { padding-bottom: 0; }
.article-toc-panel { position: sticky; top: 104px; align-self: start; }
.article-toc-panel details { border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.9); box-shadow: 0 18px 52px rgba(82,101,138,.08); overflow: hidden; }
.article-toc-panel summary { padding: 16px 18px; color: var(--ink); font-weight: 800; cursor: pointer; }
.article-toc-panel nav { display: grid; gap: 4px; padding: 0 12px 14px; }
.article-toc-panel a { padding: 9px 10px; border-radius: 12px; color: var(--muted); font-size: 14px; line-height: 1.4; }
.article-toc-panel a:hover { color: var(--blue); background: var(--blue-soft); }
.article-toc-panel a[aria-current="true"] { color: var(--blue); background: var(--blue-soft); font-weight: 800; }
.story-toc {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  margin-top: -34px; margin-bottom: 56px; padding: 18px 20px;
  border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.86);
  box-shadow: 0 18px 52px rgba(82,101,138,.08);
}
.story-toc span { color: var(--muted); font-size: 14px; font-weight: 800; }
.story-toc a {
  padding: 9px 12px; border-radius: 12px; background: var(--blue-soft);
  color: var(--blue); font-size: 14px; font-weight: 800;
}
.founder-story { max-width: 940px; padding-bottom: 0; }
.founder-story > :last-child { margin-bottom: 0; }
.founder-story + .related-section { padding-top: 48px; padding-bottom: 56px; }
.founder-story h2 {
  position: relative; margin-top: 72px; padding-top: 34px;
  border-top: 1px solid var(--line); font-size: clamp(28px, 3.2vw, 42px);
}
.founder-story h2::before {
  content: ""; position: absolute; top: -2px; left: 0; width: 72px; height: 3px;
  border-radius: 999px; background: linear-gradient(90deg, var(--orange), var(--blue-light));
}
.founder-story p { max-width: 780px; margin: 14px 0; color: #42516a; }
.founder-story blockquote {
  max-width: 800px; margin: 24px 0; padding: 20px 24px;
  border: 1px solid #f0d8c4; border-left: 5px solid var(--orange);
  background: linear-gradient(135deg, #fff8f0, #fffdf9); color: #1f2a44; font-weight: 700;
  box-shadow: 0 18px 44px rgba(193,120,62,.08);
}
.story-kicker {
  max-width: 900px !important; margin: 0 0 38px !important; padding: 28px 32px;
  border: 1px solid #dfe9fb; border-radius: 22px; background: linear-gradient(135deg, #f5f9ff, #fffaf4);
  color: var(--ink) !important; font-size: 22px !important; font-weight: 800; line-height: 1.7 !important;
}
.story-callout {
  max-width: 850px !important; margin: 28px 0 !important; padding: 24px 28px;
  border-radius: 22px; border: 1px solid #f3dec7; background: #fff7ed;
  color: #172033 !important; font-size: 20px !important; font-weight: 800; line-height: 1.75 !important;
}
.story-bridge { margin-top: 22px !important; color: var(--orange-deep) !important; font-weight: 800; }
.story-marker {
  display: inline-flex; margin: 22px 0 10px !important; padding: 8px 12px;
  border-radius: 12px; background: var(--blue-soft); color: var(--blue) !important; font-size: 15px !important; font-weight: 800;
}
.story-list {
  max-width: 760px; margin: 14px 0 28px; padding: 22px 28px 22px 46px;
  border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.9); color: var(--muted); line-height: 1.8;
}
.story-inline-image {
  width: min(520px, 100%); margin: 30px auto 42px; padding: 10px;
  border: 1px solid var(--line); border-radius: 28px; background: #fff;
  box-shadow: 0 22px 58px rgba(82,101,138,.1); overflow: hidden;
}
.story-inline-image img { display: block; width: 100%; height: auto; border-radius: 20px; }
.story-image-family { width: min(260px, 62vw); padding: 8px; border-radius: 999px; box-shadow: 0 14px 34px rgba(82,101,138,.08); }
.story-image-family img { border-radius: 999px; }
.story-image-logo-icon { width: min(150px, 42vw); padding: 8px; border-radius: 30px; }
.story-image-logo-icon img { border-radius: 22px; }
.story-image-logo-word { width: min(300px, 70vw); padding: 12px 18px; border-radius: 24px; }
.story-image-logo-word img { border-radius: 16px; }
.story-carousel {
  width: min(900px, 100%); margin: 30px 0 46px; display: grid; grid-auto-flow: column;
  grid-auto-columns: minmax(260px, 46%); gap: 16px; overflow-x: auto; overscroll-behavior-inline: contain;
  padding: 6px 4px 18px; scroll-snap-type: x mandatory;
}
.story-carousel figure {
  margin: 0; padding: 10px; border: 1px solid var(--line); border-radius: 28px; background: #fff;
  box-shadow: 0 20px 48px rgba(82,101,138,.09); scroll-snap-align: start; overflow: hidden;
}
.story-carousel img { display: block; width: 100%; height: auto; border-radius: 20px; }
.source-note { margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
.related-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.related-links a { padding: 12px 16px; color: var(--blue); font-weight: 700; }
.sub-related-title { margin-top: 38px !important; font-size: clamp(24px, 3vw, 34px) !important; }
.product-depth { padding-bottom: 84px; }
.product-depth-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 14px; margin-top: 36px; }
.product-depth-grid article { padding: 22px; border: 1px solid var(--line); border-radius: 22px; background: rgba(255,255,255,.9); box-shadow: 0 16px 42px rgba(82,101,138,.07); }
.product-depth-grid span { display: block; color: var(--orange-deep); font-size: 14px; font-weight: 800; margin-bottom: 10px; }
.product-depth-grid p { margin: 0; color: var(--muted); line-height: 1.72; }
.product-evidence { padding: 18px 0 0; }
.product-evidence-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 560px)); justify-content: center; gap: 20px; margin-top: 36px; align-items: start; }
.product-evidence-card { margin: 0; }
.product-evidence-card .proof-shot { height: 520px; padding: 10px; border-radius: 34px; }
.product-evidence-card .proof-shot img { border-radius: 24px; }
.product-evidence-card p { color: var(--muted); line-height: 1.72; font-size: 15px; }
.product-evidence-card:first-child { grid-row: span 2; }
.product-evidence-card:first-child .proof-shot { height: 680px; }
.product-evidence-card:first-child p { color: #42516a; font-size: 16px; font-weight: 700; }
.product-proof { padding-top: 108px; padding-bottom: 72px; }
.product-proof .section-heading h2 { font-size: clamp(30px, 3.2vw, 42px); }
.faq-index { display: flex; flex-wrap: wrap; gap: 12px; margin-top: -28px; margin-bottom: 44px; }
.faq-index a { padding: 10px 14px; border-radius: 14px; background: var(--blue-soft); color: var(--blue); font-weight: 800; }
.faq-page { padding-bottom: 90px; }
.faq-category { margin-bottom: 42px; }
.faq-category h2 { margin: 0; color: var(--ink); font-size: 28px; }
.compact { min-height: 360px; }
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .hero, .split, .proof-layout, .compare-layout, .reverse, .footer-grid { grid-template-columns: 1fr; gap: 44px; }
  .problem-grid, .flow-grid, .knowledge-grid, .evidence-grid, .evidence-grid.three { grid-template-columns: repeat(2, 1fr); }
  .product-depth-grid { grid-template-columns: repeat(2, 1fr); }
  .product-evidence-grid { grid-template-columns: 1fr; }
  .article-layout { grid-template-columns: 1fr; gap: 28px; }
  .article-toc-panel { position: static; }
}
@media (max-width: 640px) {
  body { padding-bottom: 88px; }
  .section-shell { width: min(100% - 32px, 1240px); }
  .site-header { top: 10px; left: 12px; right: 12px; min-height: 58px; padding: 8px 10px; border-radius: 20px; }
  .brand { gap: 8px; }
  .brand > img:first-child { width: 40px; height: 40px; }
  .brand-wordmark { width: 72px; height: 28px; }
  .nav-cta { display: none; }
  .mobile-menu-toggle {
    display: inline-flex; position: relative; align-items: center; justify-content: center; flex: 0 0 44px;
    width: 44px; height: 44px; padding: 0; border: 1px solid var(--line); border-radius: 14px;
    background: rgba(255,255,255,.86); color: var(--blue);
  }
  .mobile-menu-toggle span {
    position: absolute; width: 21px; height: 2px; border-radius: 999px; background: var(--blue);
    transition: transform .18s ease, opacity .18s ease, top .18s ease;
  }
  .mobile-menu-toggle span:nth-child(1) { top: 15px; }
  .mobile-menu-toggle span:nth-child(2) { top: 21px; }
  .mobile-menu-toggle span:nth-child(3) { top: 27px; }
  .mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) { top: 21px; transform: rotate(45deg); }
  .mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) { top: 21px; transform: rotate(-45deg); }
  .mobile-menu-backdrop {
    position: fixed; inset: 0; z-index: 48; display: block; border: 0; background: transparent;
  }
  .mobile-menu {
    position: fixed; z-index: 49; top: 76px; left: 12px; right: 12px; display: block;
    max-height: min(460px, calc(100vh - 168px)); overflow-y: auto;
    border: 1px solid var(--line); border-radius: 20px; background: rgba(255,255,255,.96);
    box-shadow: 0 18px 52px rgba(82,101,138,.14); backdrop-filter: blur(18px);
    animation: mobileMenuIn .18s ease both;
  }
  .mobile-menu-backdrop[hidden] { display: none; }
  .mobile-menu[hidden] { display: none; }
  .mobile-menu nav { display: grid; padding: 10px; }
  .mobile-menu a { padding: 14px 12px; border-radius: 14px; color: var(--body); font-weight: 750; }
  .mobile-menu a:hover { background: var(--blue-soft); color: var(--blue); }
  .mobile-menu a[aria-current="page"] { background: #fff4ea; color: var(--orange-deep); }
  @keyframes mobileMenuIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .hero { gap: 20px; min-height: auto; padding-top: 112px; padding-bottom: 56px; }
  .hero-copy h1 { max-width: 100%; font-size: 31px; line-height: 1.18; word-break: normal; }
  .title-line-pc { display: none !important; }
  .title-line-mobile { display: block !important; }
  .hero-copy p { order: 3; font-size: 16px; line-height: 1.72; margin: 0; }
  .hero-evidence { width: 100%; min-height: 0; }
  .hero-scene { min-height: auto; padding: 10px; }
  .hero-actions { order: 5; width: 100%; margin-top: 0; }
  .hero-actions .button.primary { display: none; }
  .hero-actions .button.secondary { width: 100%; }
  .hero-proof { order: 4; grid-template-columns: 1fr; width: 100%; margin: 0; }
  .section-band, .flow-section, .faq-section, .related-section, .final-cta { padding: 72px 0; }
  .problem-grid, .flow-grid, .knowledge-grid, .evidence-grid, .evidence-grid.three { grid-template-columns: 1fr; }
  .flow-grid article:not(:last-child)::after { display: none; }
  .flow-rail { display: none; }
  .knowledge-grid { padding-bottom: 72px; }
  .proof-stack { min-height: auto; display: grid; justify-items: center; gap: 16px; }
  .proof-stack .large, .proof-stack .small { position: static; width: min(100%, 310px); height: 540px; transform: none; }
  .scene-section { padding: 8px 0 56px; }
  .page-hero + .scene-section, .article-hero + .scene-section { padding-bottom: 48px; }
  .scene-scroll { margin-inline: 0; padding-inline: 0; overflow-x: visible; }
  .scene-banner { width: 100%; border-radius: 22px; }
  .compare-card { grid-template-columns: 1fr; }
  .page-hero, .article-hero { padding-top: 112px; padding-bottom: 54px; }
  .section-heading h2, .final-cta h2, .related-section h2, .page-hero h1, .article-hero h1 { word-break: normal; }
  .section-heading h2, .final-cta h2, .related-section h2 { font-size: 30px; line-height: 1.2; }
  .page-hero h1, .article-hero h1 { font-size: 36px; line-height: 1.16; }
  .heading-pc { display: none !important; }
  .heading-mobile { display: block !important; }
  .article-body p { font-size: 17px; }
  .story-toc { flex-wrap: nowrap; overflow-x: auto; margin-top: -22px; margin-bottom: 42px; padding: 12px; }
  .story-toc span, .story-toc a { flex: 0 0 auto; }
  .founder-story h2 { margin-top: 54px; padding-top: 28px; font-size: 28px; }
  .founder-story blockquote, .story-callout, .story-kicker { padding: 18px 20px; border-radius: 18px; }
  .story-kicker { font-size: 18px !important; }
  .story-callout { font-size: 18px !important; }
  .story-list { padding: 18px 20px 18px 36px; }
  .story-inline-image { width: min(100%, 330px); margin-inline: auto; }
  .story-image-family { width: min(190px, 52vw); }
  .story-image-logo-icon { width: min(128px, 38vw); }
  .story-image-logo-word { width: min(240px, 68vw); }
  .story-carousel { grid-auto-columns: minmax(260px, 82%); margin-inline: -4px; }
  .evidence-grid .proof-shot { height: 560px; }
  .product-depth-grid, .product-evidence-grid, .footer-columns { grid-template-columns: 1fr; }
  .product-evidence-card:first-child { grid-row: auto; }
  .product-evidence-card .proof-shot { height: 560px; }
  .product-evidence-card:first-child .proof-shot { height: 620px; }
  .footer-grid { text-align: center; justify-items: center; }
  .footer-grid img { object-position: center; }
  .footer-columns nav { justify-items: center; }
  .faq-index { flex-wrap: nowrap; overflow-x: auto; margin-bottom: 34px; }
  .faq-index a { flex: 0 0 auto; }
  .article-toc-panel details { border-radius: 18px; }
  .mobile-cta-bar {
    position: fixed; z-index: 60; left: 16px; right: 16px; bottom: calc(12px + env(safe-area-inset-bottom));
    display: flex; align-items: center; justify-content: space-between; gap: 14px; padding: 8px;
    border: 1px solid rgba(230,233,239,.65); border-radius: 22px; background: rgba(255,255,255,.56);
    box-shadow: 0 14px 36px rgba(77,92,119,.1); backdrop-filter: blur(16px); pointer-events: none;
  }
  .mobile-cta-bar img { display: block; width: 48px; height: 48px; border-radius: 14px; box-shadow: 0 12px 28px rgba(77,92,119,.14); pointer-events: auto; }
  .mobile-cta-bar a { display: flex; align-items: center; justify-content: center; flex: 0 0 auto; min-height: 44px; padding: 0 20px; border-radius: 16px; color: #fff; background: var(--orange); font-size: 15px; font-weight: 700; pointer-events: auto; }
}
@media (max-width: 380px) {
  .brand > img:first-child { display: none; }
  .brand-wordmark { width: 88px; height: 34px; }
}
/* Match image proportions to their reading context. */
.hero { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 64px; min-height: 740px; padding-top: 120px; padding-bottom: 60px; }
.hero-copy { display: block; }
.hero-copy h1 { font-size: 64px; line-height: 1.16; text-align: left; max-width: 640px; }
.hero-copy p { text-align: left; max-width: 550px; margin: 28px 0; }
.hero-copy .hero-actions { justify-content: flex-start; margin: 28px 0; }
.hero-copy .hero-proof { width: 100%; max-width: 550px; margin-top: 32px; }
.home-phone { width: 100%; background: none; }
.home-phone .proof-shot { width: min(100%, 360px); height: 580px; margin: 0; padding: 10px; border-radius: 36px; }
.home-phone .proof-shot img { border-radius: 26px; }
.banner-feature { display: flex; flex-direction: column; gap: 32px; }
.banner-feature > h2 { max-width: 100%; margin: 0; font-size: 44px; line-height: 1.25; text-wrap: balance; }
.banner-feature .section-heading { max-width: 920px; }
.banner-feature .section-heading p { margin-top: 0; }
.banner-feature .scene-banner { border-radius: 8px; box-shadow: none; }
.home-knowledge, .growth-feature { padding-top: 88px; padding-bottom: 88px; }
.home-knowledge .section-heading { margin-bottom: 32px; }
.product-evidence-grid { display: flex; flex-direction: column; gap: 56px; }
.product-evidence-card { display: grid; grid-template-columns: minmax(0, 340px) minmax(0, 1fr); align-items: center; gap: 64px; padding-bottom: 56px; border-bottom: 1px solid var(--line); }
.product-evidence-card .proof-shot, .product-evidence-card:first-child .proof-shot { height: auto; margin: 0; border-radius: 24px; }
.product-evidence-card .proof-shot img { height: auto; border-radius: 16px; }
.product-evidence-card p, .product-evidence-card:first-child p { font-size: 19px; line-height: 1.85; font-weight: 400; max-width: 580px; }
@media (min-width: 641px) and (max-width: 1100px) {
  .hero { gap: 32px; }
  .hero-copy h1 { font-size: 48px; }
}
@media (max-width: 640px) {
  .hero { display: flex; gap: 24px; padding-top: 110px; min-height: auto; }
  .hero-copy { display: contents; }
  .hero-copy h1 { order: 1; width: 100%; font-size: 38px; text-align: left; }
  .home-phone { order: 2; }
  .home-phone .proof-shot { width: min(100%, 340px); height: 520px; }
  .hero-copy p { order: 3; margin: 0; font-size: 17px; }
  .hero-copy .hero-proof { order: 4; margin: 0; grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .hero-proof div { padding: 14px 10px; }
  .hero-copy .hero-actions { order: 5; margin: 0; }
  .banner-feature { gap: 24px; }
  .banner-feature > h2 { font-size: 30px; }
  .home-knowledge, .growth-feature { padding-top: 56px; padding-bottom: 56px; }
  .product-evidence-card { grid-template-columns: minmax(0, 1fr); gap: 24px; padding-bottom: 32px; }
  .product-evidence-card .proof-shot { width: min(100%, 340px); justify-self: center; }
  .product-evidence-card p, .product-evidence-card:first-child p { font-size: 17px; margin: 0; }
}
.home-phone .proof-shot { width: min(100%, 320px); height: auto; }
.home-phone .proof-shot img { height: auto; }
@media (max-width: 640px) {
  .home-phone .proof-shot { width: min(250px, 58vw); margin-inline: auto; padding: 8px; border-radius: 28px; }
  .hero { gap: 20px; }
}
.footer-brand .wechat-material { display: block; width: min(100%, 340px); height: auto; margin-top: 16px; }
.footer-brand .wechat-material img { display: block; width: 100%; height: auto; border-radius: 0; }
.direct-answer { margin-top: 24px; padding-left: 20px; border-left: 3px solid var(--green); max-width: 920px; }
.direct-answer h2 { margin: 0 0 12px; font-size: 22px; line-height: 1.4; }
.direct-answer p { margin: 0; font-size: 17px; line-height: 1.8; color: var(--body); }
.story-case { margin: 32px 0; }
.story-case h3 { margin-top: 0; }
.story-case .story-carousel { margin: 20px 0; }
.story-case .image-zoom-trigger { height: auto; }
.story-case figcaption { font-size: 15px; line-height: 1.7; padding-top: 12px; color: var(--muted); }
.knowledge-grid .knowledge-link { display: flex; flex-direction: column; }
.knowledge-grid .read-article { display: flex; align-items: center; gap: 8px; margin: auto 0 0; padding-top: 20px; color: #0b4aa2; font-size: 15px; }
.knowledge-grid .read-article span { margin: 0; color: inherit; font-size: 20px; }
.knowledge-grid .knowledge-link:hover, .knowledge-grid .knowledge-link:focus-visible { border-color: #1766ce; background: #f4f8ff; box-shadow: 0 10px 28px rgba(23,102,206,.12); }
.knowledge-grid .knowledge-link:hover strong, .knowledge-grid .knowledge-link:focus-visible strong { color: #0b4aa2; }
.knowledge-grid .knowledge-link:focus-visible { outline: 2px solid #1766ce; outline-offset: 3px; }
.knowledge-grid .knowledge-link:active { background: #e8f1ff; }
.gallery-controls { display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin: 24px 0; }
.gallery-controls > span { color: var(--muted); font-size: 14px; margin-right: 8px; font-variant-numeric: tabular-nums; }
.gallery-controls button { width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 50%; background: white; color: #0b4aa2; font-size: 24px; cursor: pointer; }
.gallery-controls button:hover { border-color: #1766ce; background: #f4f8ff; }
.gallery-controls button:disabled { opacity: .35; cursor: default; }
.evidence-gallery .product-evidence-grid { display: flex; flex-direction: row; gap: 28px; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; margin: 0; padding: 4px 0 20px; scrollbar-width: thin; scrollbar-color: #aac4e7 transparent; }
.evidence-gallery .product-evidence-card { flex: 0 0 40%; min-width: 0; display: flex; flex-direction: column; gap: 22px; padding: 0; border: 0; scroll-snap-align: start; }
.evidence-gallery .product-evidence-card .proof-shot { width: 100%; height: 560px; margin: 0; padding: 0; background: transparent; border: 0; box-shadow: none; }
.evidence-gallery .product-evidence-card .proof-shot img { width: 100%; height: 100%; object-fit: contain; object-position: center; border-radius: 0; }
.evidence-gallery .product-evidence-card p { width: 100%; max-width: 420px; margin: 0; font-size: 17px; line-height: 1.8; }
.evidence-gallery .product-evidence-grid { justify-content: flex-start; }
.gallery-controls button:focus-visible, .evidence-gallery .product-evidence-grid:focus-visible { outline: 2px solid #1766ce; outline-offset: 3px; }
@media (max-width: 640px) {
  .evidence-gallery .product-evidence-grid { gap: 18px; }
  .evidence-gallery .product-evidence-card { flex-basis: 88%; }
  .evidence-gallery .product-evidence-card .proof-shot { height: 520px; }
  .evidence-gallery .product-evidence-card p { font-size: 16px; }
}
.evidence-gallery { max-width: 1240px; margin: 38px auto 0; }
.evidence-gallery .product-evidence-grid { gap: 32px; scrollbar-width: none; }
.evidence-gallery .product-evidence-grid::-webkit-scrollbar { display: none; }
.evidence-gallery .product-evidence-card { flex-basis: calc((100% - 64px) / 3); gap: 24px; }
.evidence-gallery .product-evidence-card .proof-shot { height: 640px; background: #f1f5fa; padding: 20px 12px; border-radius: 8px; }
.evidence-caption { width: 100%; }
.evidence-caption h3 { margin: 0 0 12px; font-size: 23px; line-height: 1.4; color: var(--ink); }
.evidence-gallery .product-evidence-card p { max-width: none; font-size: 16px; }
.gallery-pagination { display: flex; align-items: center; justify-content: center; gap: 16px; margin-top: 12px; }
[data-gallery-dots] { display: flex; }
[data-gallery-dots] button { width: 44px; height: 44px; border: 0; background: transparent; padding: 18px 6px; cursor: pointer; }
[data-gallery-dots] button::after { content: ''; display: block; height: 5px; border-radius: 3px; background: #c8d4e5; transition: background .3s; }
[data-gallery-dots] button[aria-current=true]::after { background: #1766ce; }
.gallery-pause { width: 36px; height: 36px; padding: 0; border: 0; border-radius: 50%; background: #eaf0f7; color: #31527c; font-size: 18px; cursor: pointer; }
.gallery-pagination button:focus-visible { outline: 2px solid #1766ce; outline-offset: 2px; }
@media (min-width: 641px) {
  .evidence-gallery .product-evidence-grid { overflow: visible; scroll-snap-type: none; }
  .evidence-gallery .gallery-pagination { display: none; }
}
@media (max-width: 640px) {
  .evidence-gallery { margin-top: 28px; }
  .evidence-gallery .product-evidence-grid { gap: 20px; }
  .evidence-gallery .product-evidence-card { flex-basis: 100%; gap: 20px; }
  .evidence-gallery .product-evidence-card .proof-shot { height: 600px; padding: 16px 8px; }
  .evidence-caption h3 { font-size: 22px; }
}
.evidence-gallery { max-width: 900px; margin-inline: auto; }
.screenshot-strip, .evidence-gallery .screenshot-strip {
  display: grid; grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 260px;
  justify-content: start; align-items: start; gap: 16px; width: 100%; max-width: 900px;
  overflow-x: auto; overscroll-behavior-inline: contain; scroll-snap-type: x mandatory;
  padding: 6px 4px 18px; scrollbar-width: thin; scrollbar-color: #b8c5d8 transparent;
}
.evidence-gallery .screenshot-strip::-webkit-scrollbar { display: block; height: 6px; }
.screenshot-strip::-webkit-scrollbar-thumb { background: #b8c5d8; border-radius: 4px; }
.screenshot-strip > *, .evidence-gallery .screenshot-strip > * { min-width: 0; width: 260px; scroll-snap-align: start; }
.screenshot-strip .proof-shot, .screenshot-strip > .proof-shot, .evidence-gallery .screenshot-strip .proof-shot {
  width: 260px; height: auto; margin: 0; padding: 10px; border: 1px solid var(--line);
  border-radius: 28px; background: white; box-shadow: 0 20px 48px rgba(82,101,138,.09);
}
.screenshot-strip .proof-shot img, .screenshot-strip > .proof-shot img, .evidence-gallery .screenshot-strip .proof-shot img { width: 100%; height: auto; border-radius: 20px; }
.evidence-gallery .screenshot-strip .product-evidence-card { gap: 20px; grid-row: auto; }
.screenshot-strip .evidence-caption h3 { font-size: 20px; }
.evidence-gallery .screenshot-strip .product-evidence-card p { font-size: 15px; line-height: 1.75; }
@media (max-width: 640px) {
  .screenshot-strip, .evidence-gallery .screenshot-strip { grid-auto-columns: min(260px, 64vw); }
  .screenshot-strip > *, .evidence-gallery .screenshot-strip > *,
  .screenshot-strip .proof-shot, .screenshot-strip > .proof-shot, .evidence-gallery .screenshot-strip .proof-shot { width: min(260px, 64vw); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}