/* Shared visual baseline derived from homepage.html. */
:root {
  --primary: #196FF8;
  --deep: #168FF9;
  --ink: #32363C;
  --body: #606773;
  --muted: #8A919C;
  --soft: #F6FAFF;
  --pale: #EEF6FF;
  --line: rgba(25, 111, 248, 0.14);
  --line-strong: rgba(25, 111, 248, 0.28);
  --mint: #74D6C2;
  --lavender: #BAB8FF;
  --amber: #F5B971;
  --shadow-xs: 0 1px 2px rgba(24, 63, 166, 0.04);
  --shadow-sm: 0 2px 12px rgba(24, 63, 166, 0.06);
  --shadow: 0 12px 40px rgba(24, 63, 166, 0.08);
  --shadow-lg: 0 24px 60px rgba(24, 63, 166, 0.12);
  --shadow-xl: 0 32px 80px rgba(24, 63, 166, 0.16);
  --glow-primary: 0 0 40px rgba(25, 111, 248, 0.25);
  --glow-deep: 0 0 60px rgba(24, 63, 166, 0.15);
  --s1: 4px;
  --s2: 8px;
  --s3: 12px;
  --s4: 16px;
  --s5: 24px;
  --s6: 32px;
  --s7: 48px;
  --s8: 64px;
  --s9: 96px;
  --s10: 104px;
  --font: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --t-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --t-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --t-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --site-h1-size: 44px;
  --site-h1-line-height: 1.35;
  --site-h2-size: 36px;
  --site-h2-line-height: 1.55;
  --site-h3-size: 22px;
  --site-body-size: 20px;
  --site-lead-size: 24px;
  --site-min-text-size: 14px;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  width: 100%;
  margin: 0;
  font-family: var(--font);
  font-size: var(--site-body-size);
  line-height: 1.8;
  color: var(--body);
  background: #fff;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body h1,
body .hero h1,
body .hero-title {
  font-size: var(--site-h1-size) !important;
  line-height: var(--site-h1-line-height) !important;
  font-weight: 580;
  letter-spacing: -0.025em;
  text-wrap: balance;
  color: var(--ink);
}

body h2,
body .section-header h2 {
  font-size: var(--site-h2-size) !important;
  line-height: var(--site-h2-line-height) !important;
  font-weight: 580;
  letter-spacing: -0.015em;
  word-break: keep-all;
  text-wrap: balance;
  color: var(--ink);
}

body h3 {
  font-size: var(--site-h3-size);
  line-height: 31px;
  color: var(--ink);
  font-weight: 620;
}

body h4 {
  font-size: 18px;
  line-height: 25px;
  color: var(--ink);
  font-weight: 620;
}

p { color: var(--body); }
a { color: var(--primary); text-decoration: none; }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: var(--s4);
  padding: 6px 14px;
  border: 1px solid rgba(25, 111, 248, 0.1);
  border-radius: 20px;
  color: var(--primary);
  background: rgba(25, 111, 248, 0.06);
  font-size: max(14px, var(--site-min-text-size));
  font-weight: 650;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.kicker::before {
  content: '';
  width: 6px;
  height: 6px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}

.container { margin-right: auto; margin-left: auto; }

.section {
  position: relative;
  padding-top: var(--s10);
  padding-bottom: var(--s10);
}

.section-soft {
  background: linear-gradient(180deg, var(--soft) 0%, rgba(246, 250, 255, 0.5) 100%);
}

.center { text-align: center; }
.center .kicker { margin-right: auto; margin-left: auto; }
.center p { margin-right: auto; margin-left: auto; }

.glass {
  position: relative;
  border: 1px solid transparent;
  border-radius: var(--r-lg);
  background: rgba(255, 255, 255, 0.85);
  background-clip: padding-box;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  transition: all var(--t-normal);
}

.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  padding: 1px;
  border-radius: inherit;
  background: none;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  transition: opacity var(--t-normal);
}

.glass::after {
  content: '';
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(105deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-15deg);
  pointer-events: none;
  transition: left 0.6s ease;
}

.glass:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl), inset 0 1px 0 rgba(255, 255, 255, 0.7), 0 0 0 1px rgba(25, 111, 248, 0.08);
}

.glass:hover::before {
  background: linear-gradient(135deg, var(--primary), rgba(116, 214, 194, 0.3), rgba(186, 184, 255, 0.3), transparent);
}

.glass:hover::after { left: 130%; }

body .hero .lead {
  font-size: var(--site-lead-size);
}

.nav {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 100;
  height: 68px;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(25, 111, 248, 0.08);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  transition: all var(--t-normal);
}

.nav.scrolled {
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 1px 20px rgba(24, 63, 166, 0.05);
}

.container,
.nav-inner {
  width: calc(100% - 40px);
  max-width: 1440px;
  padding-right: 20px;
  padding-left: 20px;
}

.nav-inner {
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
}

.nav-logo,
.nav-logo img {
  width: 227px;
  height: 54px;
  object-fit: contain;
  object-position: left center;
}

.nav-logo {
  display: flex;
  align-items: center;
  position: relative;
}

.nav-logo img { display: block; }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 60px;
  list-style: none;
}

.nav-menu a {
  display: block;
  padding: 0 0 14px;
  border-radius: 0;
  font-size: 16px;
  line-height: 22px;
  font-weight: 500;
  color: #606773;
  position: relative;
  transition: all var(--t-fast);
}

.nav-menu a:hover {
  color: var(--primary);
  background: transparent;
}

.nav-menu a.active {
  color: var(--primary);
  background: transparent;
  font-weight: 600;
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 24px;
  height: 4px;
  transform: translateX(-50%);
  border-radius: 18px;
  background: linear-gradient(90deg, #168FF9, #196FF8);
}

.nav-cta .btn {
  min-height: 36px;
  padding: 8px 18px;
  border: 0;
  border-radius: 18px;
  font-size: 14px;
  line-height: 20px;
  box-shadow: none;
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-menu-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 8px;
  color: #33415d;
  background: transparent;
  cursor: pointer;
}

.nav-menu-toggle svg {
  display: block;
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.nav-menu-toggle img {
  display: block;
  width: 24px;
  height: 24px;
  margin: auto;
}

.footer {
  min-height: 440px;
  padding: 80px 0 58px;
  background: #03070C url('footer-background.svg') center / cover no-repeat;
  color: rgba(255, 255, 255, 0.6);
}

.footer-grid {
  display: grid;
  grid-template-columns: 305px 92px 57px 130px 96px;
  justify-content: space-between;
  gap: 0;
  margin-bottom: 60px;
}

.footer-brand {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 24px;
}
.footer .footer-brand .nav-logo,
.footer .footer-brand .nav-logo img { width: 227px; height: 54px; }
.footer-col { padding-top: 20px; }
.footer-qr {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}
.footer-qr h5,
.footer-col h5 {
  margin-bottom: 24px;
  font-size: max(14px, var(--site-min-text-size));
  line-height: 20px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.9);
}
.footer-qr h5 { margin-bottom: 20px; }
.footer-qr-img {
  display: block;
  width: 96px;
  height: 96px;
  margin-bottom: 12px;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: #fff;
}
.footer-qr-label {
  font-size: max(14px, var(--site-min-text-size));
  line-height: 17px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.6);
  word-break: keep-all;
}
.footer-desc {
  max-width: 234px;
  font-size: 14px;
  line-height: 24px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.4);
  text-align: justify;
}
.footer-col ul { margin: 0; padding: 0; list-style: none; }
.footer-col li { margin-bottom: 23px; line-height: 20px; }
.footer-col a {
  font-size: max(14px, var(--site-min-text-size));
  line-height: 20px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: color var(--t-fast);
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: max(14px, var(--site-min-text-size));
  line-height: 20px;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.3);
}

@media (max-width: 1100px) {
  .container,
  .nav-inner {
    width: 100%;
    padding-right: clamp(20px, 5vw, 72px);
    padding-left: clamp(20px, 5vw, 72px);
  }
  .nav-logo,
  .nav-logo img { width: 190px; height: 46px; }
  .nav-inner { position: relative; }
  .nav-menu-toggle { display: block; }
  .nav-menu {
    position: absolute;
    top: calc(100% + 10px);
    right: clamp(20px, 5vw, 72px);
    left: clamp(20px, 5vw, 72px);
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin: 0;
    padding: 10px;
    border: 1px solid rgba(25, 111, 248, 0.12);
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 48px rgba(24, 63, 166, 0.16);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    pointer-events: none;
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  }
  .nav.menu-open .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-menu a,
  .nav-menu a.active {
    padding: 11px 14px;
    border-radius: 8px;
  }
  .nav-menu a:hover,
  .nav-menu a.active { background: #f0f7ff; }
  .nav-menu a.active::after { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 48px; }
}

@media (min-width: 1101px) and (max-width: 1500px) {
  .nav-logo,
  .nav-logo img {
    width: 190px;
    height: 46px;
  }
  .nav-menu { gap: 24px; }
}

/* 1440px 笔记本及同级桌面显示器 */
@media (max-width: 1500px) and (min-width: 1367px) {
  :root {
    --site-h1-size: 40px;
    --site-h2-size: 34px;
    --site-h2-line-height: 1.5;
    --site-h3-size: 20px;
    --site-body-size: 16px;
    --site-lead-size: 20px;
  }
}

/* 1366px 笔记本 */
@media (max-width: 1366px) and (min-width: 1281px) {
  :root {
    --site-h1-size: 36px;
    --site-h2-size: 30px;
    --site-h2-line-height: 1.5;
    --site-h3-size: 19px;
    --site-body-size: 15px;
    --site-lead-size: 18px;
  }
}

/* 1280px 及较窄桌面，移动端断点前保持正文不低于 14px */
@media (max-width: 1280px) and (min-width: 721px) {
  :root {
    --site-h1-size: 34px;
    --site-h2-size: 28px;
    --site-h2-line-height: 1.5;
    --site-h3-size: 18px;
    --site-body-size: 14px;
    --site-lead-size: 17px;
  }
}

@media (min-width: 1501px) {
  .nav-inner { position: relative; }
  .nav-menu {
    position: absolute;
    top: 15px;
    left: 412px;
  }
}

@media (min-width: 1101px) {
  .footer .footer-brand .nav-logo,
  .footer .footer-brand .nav-logo img {
    width: 230px;
    height: 56px;
  }
}

@media (max-width: 720px) {
  :root {
    --site-h1-size: 24px;
    --site-h2-size: 20px;
    --site-h2-line-height: 1.5;
    --site-h3-size: 18px;
    --site-body-size: 14px;
    --site-lead-size: 14px;
    --site-min-text-size: 16px;
  }
  /* H5 正文统一为 14px；标题、加粗标签及按钮字号仍由各自规则控制。 */
  body p,
  .data-desc,
  .philosophy-card .analogy,
  .arch-layer-standard,
  .scenario-card .scenario-note,
  .article-body blockquote {
    font-size: 14px !important;
  }
  [class*="kicker"] {
    font-size: 13px !important;
    margin-bottom: 12px !important;
  }
  body h1,
  body h2,
  body h3 {
    margin-bottom: 16px !important;
  }
  body h1 + *,
  body h2 + *,
  body h3 + * {
    margin-top: 0 !important;
  }
  .section > .container > .center,
  .value-flow-header,
  .video-intro,
  .pain-header,
  .data-header,
  .voice-header,
  .map-header,
  .content-header {
    margin-bottom: 16px !important;
  }
  .home-hero .hero-content > .lead,
  #ark .ark-content > p,
  .article-summary,
  #formContainer > h3 + p {
    margin-bottom: 24px !important;
  }
  .naming-note {
    margin-top: 24px !important;
  }
  body h1,
  body h2,
  body h3,
  body h4,
  body h5,
  body h6 {
    max-width: 100%;
    white-space: normal !important;
    word-break: normal !important;
    word-wrap: break-word;
    overflow-wrap: anywhere !important;
    text-wrap: wrap !important;
  }
  body h3 { line-height: 28px; }
  .section,
  body > section:not(.hero) {
    padding-top: 32px !important;
    padding-bottom: 32px !important;
  }
  body > .hero:not(.home-hero) {
    padding-top: calc(72px + 32px);
    padding-bottom: 32px;
  }
  .nav > .nav-inner .nav-brand .nav-logo,
  .nav > .nav-inner .nav-brand .nav-logo img {
    width: 54px;
    height: 54px;
  }
  .nav > .nav-inner .nav-brand .nav-logo img {
    content: url('logo.png');
    object-fit: contain;
  }
  .footer {
    min-height: auto;
    padding: 18px 0 10px;
  }
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 20px;
    row-gap: 32px;
    margin-bottom: 28px;
  }
  .footer-grid > :first-child {
    grid-column: 1 / -1;
  }
  .footer .footer-brand {
    margin-bottom: 16px;
  }
  .footer .footer-brand .nav-logo,
  .footer .footer-brand .nav-logo img {
    width: 168px;
    height: 40px;
  }
  .footer .footer-brand .nav-logo img {
    content: url('brand-logo-horizontal.png');
    object-fit: contain;
  }
  .footer-desc {
    max-width: none;
    line-height: 1.7;
  }
  .footer-col {
    min-width: 0;
    padding-top: 0;
  }
  .footer-qr h5,
  .footer-col h5 {
    margin-bottom: 16px;
    font-size: 14px;
    line-height: 20px;
  }
  .footer-col li {
    margin-bottom: 10px;
    line-height: 20px;
  }
  .footer-col li:last-child {
    margin-bottom: 0;
  }
  .footer-col a {
    font-size: 14px;
  }
  .footer-qr-img {
    width: 72px;
    height: 72px;
    margin-bottom: 8px;
  }
  .footer-qr-label {
    line-height: 18px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-top: 16px;
    font-size: 12px;
    line-height: 1.7;
  }
}

@media (max-width: 640px) {
  .nav { height: 72px; }
  .nav-cta .btn { padding: 8px 13px; font-size: 14px; }
  .nav-actions { gap: 6px; }
  .nav-menu {
    right: 12px;
    left: 12px;
    top: calc(100% + 6px);
  }
}