/* ============================================
   UTUM Design System v3 – Enterprise Premium
   Deep hero · Section rhythm · Refined accent
   ============================================ */

/* --- 1. DESIGN TOKENS --- */
:root {
  /* Brand accent – aligned with 工程学妹 engineering palette */
  --accent:       #1E76B9;
  --accent-dark:  #0F5EA8;
  --accent-light: #E8F4F7;
  --accent-warm:  #F4B846;

  /* Ink scale */
  --ink-900: #152532;
  --ink-800: #203545;
  --ink-700: #31485A;
  --ink-600: #536878;
  --ink-500: #607382;
  --ink-400: #8DA0AB;
  --ink-300: #B8C6CD;

  /* Backgrounds */
  --bg-white:  #FBFDFB;
  --bg-paper:  #FBF7EE;
  --bg-cool:   #EEF1ED;     /* concrete paper tone */
  --bg-soft:   #F7FAF9;
  --bg-navy:   #152532;     /* dark ink section */
  --bg-mid:    #EDF4F4;     /* card / section fill */

  /* Borders */
  --line-100: rgba(21,37,50,0.08);
  --line-200: rgba(21,37,50,0.12);
  --line-300: rgba(21,37,50,0.20);

  /* Radii – kept at 0 / small for enterprise sharpness */
  --r-sm: 2px;
  --r-md: 6px;
  --r-lg: 10px;

  /* Shadows */
  --shadow-sm: 0 8px 24px rgba(21,37,50,0.06);
  --shadow-md: 0 16px 42px rgba(21,37,50,0.10);
  --shadow-lg: 0 24px 64px rgba(21,37,50,0.14);

  /* Type */
  --font: "Noto Serif SC", "Source Han Serif SC", "Source Han Serif CN", "Songti SC", STSong, SimSun, serif;
  --font-latin: "IBM Plex Serif", Georgia, "Times New Roman", serif;

  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --tr:   0.22s var(--ease);

  --nav-h:    64px;
  --content-w: 1200px;
}

/* --- 2. RESET --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-700);
  background:
    linear-gradient(rgba(30,118,185,0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,118,185,0.055) 1px, transparent 1px),
    linear-gradient(180deg, #f8fbfb 0%, #edf3f2 48%, #e6eee9 100%);
  background-size: 32px 32px, 32px 32px, auto;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }

/* --- 3. TYPOGRAPHY --- */
h1, h2, h3, h4, h5, h6 {
  color: var(--ink-900);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.015em;
}
h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
h2 { font-size: 1.875rem; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1rem; }
p  { margin-bottom: 1em; }
p:last-child { margin-bottom: 0; }

.text-muted  { color: var(--ink-500); }
.text-center { text-align: center; }
.text-accent { color: var(--accent); }

/* --- 4. LAYOUT --- */
.container {
  width: 100%;
  max-width: var(--content-w);
  margin-inline: auto;
  padding-inline: 40px;
}

.section     { padding-block: 88px; }
.section--lg { padding-block: 120px; }
.section--sm { padding-block: 56px; }

/* Section backgrounds */
.section--white { background: var(--bg-white); }
.section--cool  { background: var(--bg-cool); }
.section--navy  {
  background: var(--bg-navy);
  color: rgba(255,255,255,0.85);
}
.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy h4 { color: #fff; }
.section--navy .eyebrow { color: rgba(255,255,255,0.4); }

/* Split layout */
.split { display: grid; grid-template-columns: 1fr 360px; gap: 80px; align-items: start; }

/* Section header */
.section-head { margin-bottom: 56px; }
.section-head.centered { text-align: center; }
.section-head p { color: var(--ink-500); font-size: 1rem; margin-top: 14px; max-width: 600px; }
.section-head.centered p { margin-inline: auto; }
.section--navy .section-head p { color: rgba(255,255,255,0.55); }

/* Homepage rhythm: tighter section spacing */
.home-page .section {
  padding-block: 60px;
}

.home-page .section-head {
  margin-bottom: 34px;
}

.home-page .section-head p {
  margin-top: 10px;
}

/* Eyebrow */
.eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

/* --- 5. BUTTONS --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 28px;
  height: 48px;
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--r-md);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: all var(--tr);
  white-space: nowrap;
  letter-spacing: 0.01em;
  font-family: var(--font);
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn--primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(15,94,168,0.26);
}

.btn--secondary {
  background: transparent;
  color: var(--ink-700);
  border-color: var(--line-300);
}
.btn--secondary:hover {
  border-color: var(--ink-700);
  color: var(--ink-900);
}

/* White ghost variant – for dark backgrounds */
.btn--ghost {
  background: rgba(255,255,255,0.1);
  color: #fff;
  border-color: rgba(255,255,255,0.25);
}
.btn--ghost:hover {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.5);
}

.btn--text {
  background: none;
  border: none;
  padding-inline: 0;
  height: auto;
  color: var(--accent);
  font-weight: 600;
}
.btn--text:hover { color: var(--accent-dark); }
.btn--text::after { content: ' →'; }

/* --- 6. NAVIGATION --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  height: var(--nav-h);
  background: var(--bg-navy);
}

.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.site-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
}

.site-logo img { height: 30px; width: auto; }

.site-logo--text {
  font-size: 1.5rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.04em;
}

/* Hide text inside header logo since the image already contains it */
.site-logo .site-logo--text { display: none; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  flex: 1;
}

.site-nav a {
  padding: 8px 15px;
  font-size: 0.9rem;
  font-weight: 400;
  color: rgba(255,255,255,0.72);
  transition: color var(--tr);
  white-space: nowrap;
}
.site-nav a:hover  { color: #fff; }
.site-nav a.active {
  color: #fff;
  font-weight: 600;
  background: rgba(255,255,255,0.08);
  border-radius: var(--r-sm);
}

/* --- 7. HERO --- */
.hero {
  background: var(--bg-navy);
  padding-block: 96px 80px;
  position: relative;
  overflow: hidden;
}

/* Subtle geometric accent */
.hero::before {
  content: '';
  position: absolute;
  right: -120px;
  top: -80px;
  width: 640px;
  height: 640px;
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 50%;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  right: 40px;
  top: 60px;
  width: 380px;
  height: 380px;
  border: 1px solid rgba(255,255,255,0.04);
  border-radius: 50%;
  pointer-events: none;
}

.hero h1 {
  font-size: clamp(2.25rem, 4.5vw, 3.625rem);
  line-height: 1.12;
  margin-bottom: 24px;
  max-width: 680px;
  color: #fff;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero p.lead {
  font-size: 1rem;
  color: rgba(255,255,255,0.58);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 560px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* Stats bar – sits below hero in cool bg */
.stats-bar {
  background: var(--bg-white);
  border-bottom: 1px solid var(--line-200);
  display: flex;
}

.stats-bar__item {
  flex: 1;
  padding: 36px 40px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-right: 1px solid var(--line-200);
  transition: background var(--tr);
}
.stats-bar__item:last-child { border-right: none; }
.stats-bar__item:hover { background: var(--bg-cool); }

.stats-bar__num {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
}
.stats-bar__num sup { font-size: 1.1rem; font-weight: 700; }

.stats-bar__label {
  font-size: 0.875rem;
  color: var(--ink-500);
}

/* --- 8. CAPABILITY CARDS --- */
.capability-card {
  padding: 40px;
  background: var(--bg-white);
  border-right: 1px solid var(--line-200);
  border-bottom: 1px solid var(--line-200);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: background var(--tr);
}
.capability-card:hover { background: var(--bg-cool); }

.capability-card__num {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--accent);
  opacity: 0.18;
  line-height: 1;
}

.capability-card h3 { font-size: 1.125rem; color: var(--ink-900); }
.capability-card p  { color: var(--ink-500); font-size: 0.9375rem; line-height: 1.75; flex: 1; }

.feature-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 4px;
  padding-top: 16px;
  border-top: 1px solid var(--line-100);
}

.feature-tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 3px 10px;
  border: 1px solid var(--line-200);
  color: var(--ink-500);
  border-radius: var(--r-sm);
}

/* --- 9. PROJECT / CASE CARDS --- */
.project-card {
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  min-height: 300px;
  transition: box-shadow var(--tr), transform var(--tr);
  text-decoration: none;
  color: inherit;
  --card-overlay-bg: rgba(10, 24, 41, 0.56);
  --card-overlay-fg: #ffffff;
  --card-overlay-muted: rgba(255, 255, 255, 0.86);
  --card-overlay-border: rgba(255, 255, 255, 0.18);
  --card-overlay-chip-bg: rgba(255, 255, 255, 0.14);
  --card-overlay-chip-fg: rgba(255, 255, 255, 0.95);
}
.project-card[data-contrast="light"] {
  --card-overlay-bg: rgba(247, 250, 252, 0.68);
  --card-overlay-fg: #0f172a;
  --card-overlay-muted: rgba(15, 23, 42, 0.86);
  --card-overlay-border: rgba(15, 23, 42, 0.14);
  --card-overlay-chip-bg: rgba(15, 23, 42, 0.08);
  --card-overlay-chip-fg: #0f172a;
}
.project-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.project-card__thumb {
  position: absolute;
  inset: 0;
  height: 100%;
  background: var(--bg-cool);
  overflow: hidden;
}
.project-card__thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(9, 16, 28, 0.42) 0%,
    rgba(9, 16, 28, 0.16) 42%,
    rgba(9, 16, 28, 0.00) 74%
  );
  pointer-events: none;
}
.project-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}
.project-card:hover .project-card__thumb img {
  transform: scale(1.04);
}

.project-card__body {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  background: var(--card-overlay-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-top: 1px solid var(--card-overlay-border);
  color: var(--card-overlay-fg);
}
.project-card__tags { display: flex; gap: 6px; margin-bottom: 14px; }
.project-card__tag {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 2px 8px;
  border: 1px solid var(--card-overlay-border);
  color: var(--card-overlay-chip-fg);
  background: var(--card-overlay-chip-bg);
  border-radius: var(--r-sm);
}

.project-card__client   { font-size: 0.8125rem; color: var(--card-overlay-muted); margin-bottom: 0; line-height: 1.4; }
.project-card__title    { font-size: 1.125rem; font-weight: 700; color: var(--card-overlay-fg); margin-bottom: 0; line-height: 1.4; }
.project-card__desc     { font-size: 0.9rem; color: var(--card-overlay-muted); line-height: 1.5; }

.project-card__footer {
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--card-overlay-border);
}
.project-card__footer-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--card-overlay-muted);
  margin-bottom: 4px;
}
.project-card__footer-value { font-size: 0.9rem; color: var(--card-overlay-fg); }

/* --- 10. PAGE HERO (inner pages) --- */
.page-hero {
  background: var(--bg-navy);
  padding: 72px 0 64px;
}
.page-hero h1 { color: #fff; margin-bottom: 16px; font-size: 2.375rem; }
.page-hero .lead {
  font-size: 1rem;
  color: rgba(255,255,255,0.55);
  line-height: 1.8;
  max-width: 600px;
  margin-bottom: 32px;
}

.breadcrumb {
  display: flex;
  gap: 6px;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  margin-bottom: 28px;
}
.breadcrumb a { color: rgba(255,255,255,0.55); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep::before { content: '/'; margin-inline: 4px; }

.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }

/* --- 11. FACTS SIDEBAR --- */
.facts-card {
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  border-radius: var(--r-md);
  overflow: hidden;
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  box-shadow: var(--shadow-sm);
}
.facts-card__header {
  padding: 16px 24px;
  background: var(--bg-navy);
  color: rgba(255,255,255,0.9);
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 0.04em;
}
.facts-row { padding: 20px 24px; border-bottom: 1px solid var(--line-100); }
.facts-row:last-child { border-bottom: none; }
.facts-row__label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-400);
  margin-bottom: 6px;
}
.facts-row__value { font-size: 0.9rem; color: var(--ink-700); line-height: 1.6; }

/* --- 12. CASE CONTENT --- */
.case-section-label {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-200);
}

.rich-copy { font-size: 0.9375rem; color: var(--ink-600); line-height: 1.85; }
.rich-copy p { margin-bottom: 1.25em; }
.rich-copy strong { color: var(--ink-900); font-weight: 600; }

blockquote.pull-quote {
  margin: 32px 0;
  padding: 24px 28px;
  background: var(--accent-light);
  border-left: 3px solid var(--accent);
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink-700);
  line-height: 1.65;
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

/* Timeline */
.value-box {
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  padding: 48px;
  border-radius: var(--r-md);
}

.timeline { display: flex; flex-direction: column; }
.timeline-item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 24px;
  padding-bottom: 40px;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-item__dot {
  width: 10px;
  height: 10px;
  background: var(--accent);
  border-radius: 50%;
  margin-top: 7px;
  flex-shrink: 0;
  position: relative;
}
.timeline-item__dot::after {
  content: '';
  position: absolute;
  left: 50%;
  top: 100%;
  transform: translateX(-50%);
  width: 1px;
  background: var(--line-200);
  height: 40px;
}
.timeline-item:last-child .timeline-item__dot::after { display: none; }

.timeline-item__content h4 { font-size: 1rem; margin-bottom: 8px; color: var(--ink-900); }
.timeline-item__content p  { font-size: 0.9rem; color: var(--ink-500); line-height: 1.7; }

/* --- 13. PRODUCT PAGE --- */
.product-detail-block { padding-top: 8px; }

.product-detail-head {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 40px 48px;
  background: var(--bg-cool);
  border: 1px solid var(--line-200);
  border-radius: var(--r-md);
  margin-bottom: 2px;
}

.product-badge {
  flex-shrink: 0;
  height: 60px;
  padding: 0 22px;
  background: var(--bg-navy);
  color: #fff;
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
}

.product-detail-head > div > h2 { font-size: 1.75rem; margin-bottom: 8px; }
.product-detail-head > div > p  { color: var(--ink-500); font-size: 0.9375rem; line-height: 1.65; }

/* Homepage product mini cards */
.product-mini-card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
  padding: 32px;
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  border-right-width: 0;
  text-decoration: none;
  transition: background var(--tr), box-shadow var(--tr);
}
.product-mini-card:last-child { border-right-width: 1px; }
.product-mini-card:hover { background: var(--bg-cool); box-shadow: var(--shadow-sm); }

.product-mini-icon {
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.1em;
  padding: 6px 12px;
  background: var(--bg-navy);
  color: #fff;
  border-radius: var(--r-sm);
}
.product-mini-icon img { height: 28px; width: auto; display: block; }
.product-mini-icon:has(img) { background: transparent; padding: 0; }

.product-mini-card h4 { font-size: 1rem; color: var(--ink-900); }
.product-mini-card p  { font-size: 0.875rem; color: var(--ink-500); margin: 0; }

/* --- 14. QUALIFICATIONS --- */
.cert-card {
  padding: 48px 40px;
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  border-right-width: 0;
  transition: background var(--tr), box-shadow var(--tr);
  border-radius: 0;
}
.cert-card:first-child { border-radius: var(--r-md) 0 0 var(--r-md); }
.cert-card:last-child  { border-right-width: 1px; border-radius: 0 var(--r-md) var(--r-md) 0; }
.cert-card:hover { background: var(--bg-cool); box-shadow: var(--shadow-sm); }

.cert-num {
  font-size: 3.5rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
}
.cert-num span { font-size: 1.5rem; }
.cert-card h3 { font-size: 1.125rem; margin-bottom: 10px; }
.cert-card p  { color: var(--ink-500); font-size: 0.9rem; }

.tech-row {
  padding: 22px 32px;
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  border-bottom-width: 0;
  display: flex;
  align-items: center;
  gap: 32px;
}
.tech-row:last-child         { border-bottom-width: 1px; border-radius: 0 0 var(--r-md) var(--r-md); }
.tech-row:first-child        { border-radius: var(--r-md) var(--r-md) 0 0; }

.tech-row__label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--ink-700);
  white-space: nowrap;
  min-width: 80px;
}
.tech-row__tags { display: flex; flex-wrap: wrap; gap: 8px; }
.tech-row__tags span {
  font-size: 0.8rem;
  padding: 3px 10px;
  border: 1px solid var(--line-200);
  color: var(--ink-600);
  border-radius: var(--r-sm);
  background: var(--bg-cool);
}

/* --- 15. CLIENTS --- */
.industry-card {
  padding: 40px;
  background: var(--bg-white);
  border-right: 1px solid var(--line-200);
  border-bottom: 1px solid var(--line-200);
  transition: background var(--tr);
}
.industry-card:hover { background: var(--bg-cool); }

.industry-icon { font-size: 2rem; margin-bottom: 16px; }
.industry-card h3 { font-size: 1rem; margin-bottom: 8px; }
.industry-card p  { color: var(--ink-500); font-size: 0.875rem; margin: 0; }

.client-logo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-left: 1px solid var(--line-200);
  border-top: 1px solid var(--line-200);
  border-radius: var(--r-md);
  overflow: hidden;
}
.client-logo-item {
  padding: 32px;
  border-right: 1px solid var(--line-200);
  border-bottom: 1px solid var(--line-200);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-700);
  text-align: center;
  line-height: 1.5;
  background: var(--bg-white);
  transition: background var(--tr), color var(--tr);
}
.client-logo-item:hover { background: var(--accent-light); color: var(--accent-dark); }

/* Homepage typical clients marquee */
.home-news-section {
  background: linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
}

.home-news-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.home-news-card {
  min-height: 360px;
}

.home-news-card .project-card__body {
  min-height: 148px;
}

.home-news-card .project-card__client {
  font-size: 0.78rem;
  letter-spacing: 0.03em;
}

.home-news-card .project-card__title,
.home-news-card .project-card__desc {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.home-news-card .project-card__title {
  -webkit-line-clamp: 2;
}

.home-news-card .project-card__desc {
  -webkit-line-clamp: 2;
}

.home-clients-section {
  background: linear-gradient(180deg, #f4f6fb 0%, #eef2f7 100%);
  padding: 60px 0 54px;
  overflow: hidden;
}

.home-clients-head {
  margin-bottom: 24px;
}

.home-clients-head .eyebrow {
  color: #8f8cc9;
  margin-bottom: 16px;
  text-transform: none;
  letter-spacing: 0.03em;
  font-size: 1.05rem;
}

.home-clients-head h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  max-width: 680px;
  margin-bottom: 14px;
}

.home-clients-head p {
  color: var(--ink-500);
  max-width: 660px;
}

.home-clients-bulk-admin {
  display: none;
  margin-top: 20px;
  margin-bottom: 28px;
  padding: 16px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.84);
}
body.utum-admin-mode .home-clients-bulk-admin { display: block; }

.home-clients-bulk-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--ink-800);
  margin-bottom: 10px;
}
.home-clients-bulk-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}
.home-clients-bulk-row label {
  font-size: 0.84rem;
  color: var(--ink-600);
  font-weight: 600;
}
.home-clients-bulk-row select {
  height: 34px;
  min-width: 132px;
  padding: 0 10px;
  border: 1px solid var(--line-300);
  border-radius: 8px;
  background: #fff;
  color: var(--ink-700);
  font-family: inherit;
}
.home-clients-bulk-row button {
  height: 34px;
  border: none;
  border-radius: 8px;
  padding: 0 14px;
  background: #0f172a;
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}
.home-clients-bulk-row button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.home-clients-bulk-admin textarea {
  width: 100%;
  min-height: 112px;
  resize: vertical;
  border: 1px solid var(--line-300);
  border-radius: 8px;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink-700);
  font-family: inherit;
  font-size: 0.88rem;
  line-height: 1.6;
}
.home-clients-bulk-status {
  min-height: 20px;
  margin-top: 8px;
  font-size: 0.82rem;
  color: var(--ink-500);
}
.home-clients-bulk-status.success { color: #166534; }
.home-clients-bulk-status.error { color: #b91c1c; }

.home-clients-logo-admin {
  margin-top: 14px;
  border-top: 1px solid rgba(15, 23, 42, 0.12);
  padding-top: 12px;
}
.home-clients-logo-admin__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.home-clients-logo-admin__title {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--ink-700);
}
.home-clients-logo-admin__actions button {
  height: 34px;
  border: none;
  border-radius: 8px;
  padding: 0 12px;
  background: #1d4ed8;
  color: #fff;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}
.home-clients-logo-dropzone {
  margin-top: 10px;
  border: 1.5px dashed rgba(59, 130, 246, 0.45);
  border-radius: 10px;
  padding: 10px 12px;
  background: rgba(59, 130, 246, 0.06);
  font-size: 0.8rem;
  color: #1e3a8a;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.home-clients-logo-dropzone.is-dragover {
  background: rgba(59, 130, 246, 0.14);
  border-color: #2563eb;
}
.home-clients-logo-list {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  max-height: 300px;
  overflow: auto;
  padding-right: 4px;
}
.home-clients-logo-empty {
  grid-column: 1 / -1;
  border: 1px dashed var(--line-300);
  border-radius: 10px;
  padding: 12px;
  font-size: 0.82rem;
  color: var(--ink-500);
  background: rgba(255,255,255,0.62);
}
.home-clients-logo-item {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(15, 23, 42, 0.12);
  border-radius: 10px;
  background: #fff;
  padding: 8px;
}
.home-clients-logo-item.is-drop-target {
  border-color: #2563eb;
  box-shadow: inset 0 0 0 1px rgba(37, 99, 235, 0.2);
}
.home-clients-logo-item.is-dragging {
  opacity: 0.56;
}
.home-clients-logo-handle {
  width: 20px;
  color: var(--ink-400);
  cursor: grab;
  user-select: none;
  text-align: center;
}
.home-clients-logo-preview {
  width: 74px;
  height: 44px;
  border-radius: 8px;
  background: #f8fafc;
  border: 1px solid rgba(15, 23, 42, 0.08);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 5px;
  flex: 0 0 auto;
}
.home-clients-logo-preview img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
}
.home-clients-logo-placeholder {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: rgba(30, 64, 175, 0.12);
  color: #1e40af;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
}
.home-clients-logo-meta {
  min-width: 0;
  flex: 1;
}
.home-clients-logo-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-700);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.home-clients-logo-province {
  font-size: 0.72rem;
  color: var(--ink-400);
}
.home-clients-logo-ops {
  display: flex;
  gap: 4px;
}
.home-clients-logo-ops button {
  border: 1px solid var(--line-300);
  border-radius: 7px;
  background: #fff;
  padding: 3px 6px;
  font-size: 0.72rem;
  color: var(--ink-600);
  cursor: pointer;
}
.home-clients-logo-ops button:hover {
  border-color: #94a3b8;
  color: var(--ink-800);
}

.home-clients-marquee-wrap {
  position: relative;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent 0%, #000 8%, #000 92%, transparent 100%);
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 8%, #000 92%, transparent 100%);
}

.home-clients-marquee-track {
  display: flex;
  align-items: center;
  gap: 46px;
  width: max-content;
  padding-left: 36px;
  animation: homeClientsMarquee 34s linear infinite;
}

.home-clients-marquee-track:hover {
  animation-play-state: paused;
}

.home-clients-marquee-track--offset {
  margin-top: 22px;
  padding-left: 158px;
}

@keyframes homeClientsMarquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.home-client-item {
  height: 52px;
  min-width: 150px;
  padding: 8px 12px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.78);
  border: 1px solid rgba(16,24,40,0.07);
  transition: transform var(--tr), box-shadow var(--tr), background-color var(--tr);
}

.home-client-item:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
  background: rgba(255,255,255,0.96);
}

.home-client-item img {
  max-height: 30px;
  max-width: 126px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: none;
  opacity: 1;
  transition: transform var(--tr), opacity var(--tr);
}
.home-client-item--placeholder span {
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: rgba(30, 64, 175, 0.12);
  color: #1e40af;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.76rem;
  font-weight: 700;
}

.home-client-item:hover img {
  transform: scale(1.03);
  opacity: 1;
}

.home-client-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink-500);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

/* --- 16. DEMO CENTER --- */
.experience-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 40px;
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  border-right-width: 0;
  transition: background var(--tr), box-shadow var(--tr);
}
.experience-card:last-child { border-right-width: 1px; }
.experience-card:hover { background: var(--bg-cool); box-shadow: var(--shadow-sm); }

.experience-icon { font-size: 2rem; }
.experience-card h3 { font-size: 1.125rem; }
.experience-card p  { color: var(--ink-500); font-size: 0.9rem; flex: 1; margin: 0; }

.demo-form-wrap {
  max-width: 720px;
  margin-inline: auto;
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  border-radius: var(--r-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
}
.demo-form { display: flex; flex-direction: column; gap: 20px; }
.form-row   { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 0.875rem; font-weight: 600; color: var(--ink-700); }

.form-group input,
.form-group select,
.form-group textarea {
  padding: 11px 16px;
  border: 1.5px solid var(--line-200);
  border-radius: var(--r-md);
  font-family: var(--font);
  font-size: 0.9375rem;
  color: var(--ink-700);
  background: var(--bg-white);
  transition: border-color var(--tr);
  outline: none;
  width: 100%;
  resize: vertical;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }

/* --- 17. ABOUT --- */
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line-200);
  border: 1px solid var(--line-200);
  border-radius: var(--r-lg);
  overflow: hidden;
}
.about-stat {
  padding: 40px;
  background: var(--bg-white);
  text-align: center;
  transition: background var(--tr);
}
.about-stat:hover { background: var(--bg-cool); }

.about-stat__num {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
}
.about-stat__label { font-size: 0.875rem; color: var(--ink-500); }

.value-item {
  padding: 40px;
  background: var(--bg-white);
  border-right: 1px solid var(--line-200);
  border-bottom: 1px solid var(--line-200);
  transition: background var(--tr);
}
.value-item:hover { background: var(--bg-cool); }
.value-item h3 { font-size: 1.125rem; margin-bottom: 10px; }
.value-item p  { color: var(--ink-500); font-size: 0.9rem; margin: 0; }

/* --- 17.1 ABOUT NEWS --- */
.about-news-section {
  background: linear-gradient(180deg, #ffffff 0%, #f7f8fb 100%);
}
.about-news-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}
.about-news-card {
  width: 100%;
  border: 1px solid var(--line-200);
  background: #fff;
  border-radius: var(--r-lg);
  cursor: pointer;
  overflow: hidden;
  text-align: left;
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
}
.about-news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
  border-color: rgba(30,118,185,0.35);
}
.about-news-card__cover {
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, #eaf0f8 0%, #dde5f0 100%);
  overflow: hidden;
}
.about-news-card__cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.about-news-card__body {
  padding: 18px 20px 20px;
  display: grid;
  gap: 10px;
}
.about-news-card__time {
  font-size: 0.8rem;
  color: var(--ink-400);
}
.about-news-card__title {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink-900);
}
.about-news-card__summary {
  font-size: 0.9rem;
  color: var(--ink-600);
  line-height: 1.7;
}
.about-news-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 26px;
}
.about-news-pagination button {
  min-width: 36px;
  height: 36px;
  border-radius: 18px;
  border: 1px solid var(--line-300);
  background: #fff;
  color: var(--ink-700);
  font-size: 0.85rem;
  padding: 0 12px;
  cursor: pointer;
  transition: all var(--tr);
}
.about-news-pagination button:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
}
.about-news-pagination button.is-active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.about-news-pagination button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}
.about-news-admin {
  display: none;
  margin: 22px 0 28px;
  padding: 20px;
  border: 1px solid var(--line-200);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 14px 36px rgba(15, 23, 42, 0.08);
}
body.utum-admin-mode .about-news-admin {
  display: block;
}
.about-news-admin__head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.about-news-admin__title {
  font-size: 1rem;
  font-weight: 800;
  color: var(--ink-900);
}
.about-news-admin__actions,
.about-news-admin__inline-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.about-news-admin__layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 16px;
}
.about-news-admin__sidebar,
.about-news-admin__editor {
  border: 1px solid var(--line-200);
  border-radius: 14px;
  background: #fff;
  padding: 16px;
}
.about-news-admin__sidebar-title {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--ink-800);
  margin-bottom: 12px;
}
.about-news-admin__article-list {
  display: grid;
  gap: 8px;
  max-height: 460px;
  overflow: auto;
}
.about-news-admin__grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 14px;
}
.about-news-admin__grid--single {
  grid-template-columns: minmax(0, 1fr);
}
.about-news-admin__field {
  display: grid;
  gap: 8px;
}
.about-news-admin__field span {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--ink-700);
}
.about-news-admin__field input,
.about-news-admin__field textarea {
  width: 100%;
  border: 1px solid var(--line-300);
  border-radius: 10px;
  padding: 10px 12px;
  background: #fff;
  color: var(--ink-800);
  font: inherit;
}
.about-news-admin__field textarea {
  min-height: 110px;
  resize: vertical;
}
.about-news-admin__content {
  min-height: 220px;
}
.about-news-admin__btn {
  height: 36px;
  border: none;
  border-radius: 10px;
  padding: 0 14px;
  font: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  cursor: pointer;
  color: #fff;
  background: #0f172a;
}
.about-news-admin__btn--secondary {
  background: #475569;
}
.about-news-admin__btn--danger {
  background: #b91c1c;
}
.about-news-admin__btn--primary {
  background: var(--accent);
}
.about-news-admin__status {
  min-height: 20px;
  font-size: 0.82rem;
  color: var(--ink-500);
}
.about-news-admin__status:empty {
  display: none;
}
.about-news-article {
  color: var(--ink-700);
  line-height: 1.9;
  font-size: 1rem;
}
.about-news-article p,
.about-news-article section,
.about-news-article div {
  max-width: 100%;
}
.about-news-article img {
  width: 100% !important;
  max-width: 100% !important;
  height: auto !important;
  border-radius: var(--r-md);
  margin: 12px 0;
  object-fit: contain;
}
/* --- 18. CASES GRID --- */
.cases-grid {
  border: 1px solid var(--line-200);
  border-radius: var(--r-md);
  overflow: hidden;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
}
.cases-grid .project-card {
  border: none;
  border-right: 1px solid var(--line-200);
  border-bottom: 1px solid var(--line-200);
  border-radius: 0;
}
.cases-grid .project-card:nth-child(2n) { border-right: none; }
.cases-grid .project-card:nth-last-child(-n+2) { border-bottom: none; }

/* ===== 18.1 CASE CARDS V2 (For Homepage Grid & External) ===== */
.cases-grid-v2 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 1024px) {
  .cases-grid-v2 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .cases-grid-v2 { grid-template-columns: 1fr; }
}

.case-card-v2 {
  border-radius: var(--r-md);
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line-200);
  cursor: pointer;
  transition: all .3s cubic-bezier(.4,0,.2,1);
  position: relative;
  text-decoration: none;
  display: flex;
  flex-direction: column;
}
.case-card-v2:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(59, 130, 246, 0.4);
}
.case-card-v2__thumb {
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-cool);
  position: relative;
}
.case-card-v2__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.case-card-v2:hover .case-card-v2__thumb img {
  transform: scale(1.06);
}
.case-card-v2__body { padding: 18px 24px 24px; flex: 1; }
.case-card-v2__title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink-900);
  line-height: 1.5;
  margin-bottom: 8px;
}
.case-card-v2__industry {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--ink-500);
}

/* --- 19. FOOTER --- */
.footer {
  background: var(--bg-navy);
  color: rgba(255,255,255,0.65);
  padding-block: 72px 40px;
}
.footer__grid {
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) repeat(var(--footer-grid-columns, 3), minmax(140px, 1fr));
  gap: 64px;
  margin-bottom: 56px;
  padding-bottom: 56px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__brand .site-logo--text { color: #fff; font-size: 1.5rem; margin-bottom: 16px; display: block; }
.footer__brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.45);
  max-width: 280px;
  white-space: pre-line;
}
.footer__col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: 20px;
}
.footer__links { display: flex; flex-direction: column; gap: 12px; }
.footer__links a { font-size: 0.9rem; color: rgba(255,255,255,0.6); transition: color var(--tr); }
.footer__links a:hover { color: #fff; }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}

/* --- 20. ANIMATIONS --- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}
.reveal   { animation: fadeUp 0.5s var(--ease) both; }
.delay-1  { animation-delay: 0.08s; }
.delay-2  { animation-delay: 0.16s; }
.delay-3  { animation-delay: 0.24s; }

/* --- 21. RESPONSIVE --- */
@media (max-width: 1024px) {
  h1 { font-size: 2.25rem; }
  .split { grid-template-columns: 1fr; gap: 40px; }
  .facts-card { position: static; }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .stats-bar { flex-wrap: wrap; }
  .stats-bar__item { border-right: none; border-bottom: 1px solid var(--line-200); }
  .stats-bar__item:last-child { border-bottom: none; }
  .geo3d-showcase__hero {
    grid-template-columns: 1fr;
  }
  .geo3d-feature-card,
  .geo3d-feature-card:nth-child(4),
  .geo3d-feature-card:nth-child(5) {
    grid-column: span 3;
  }
}

@media (max-width: 768px) {
  .container { padding-inline: 20px; }
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }
  .section { padding-block: 60px; }
  .site-nav { display: none; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .footer__bottom { flex-direction: column; gap: 8px; }
  .form-row { grid-template-columns: 1fr; }
  .client-logo-grid { grid-template-columns: 1fr 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .cases-grid .project-card { border-right: none !important; }
  .demo-form-wrap { padding: 28px 20px; }
  .value-box { padding: 28px 20px; }
  .product-detail-head { flex-direction: column; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .about-news-list { grid-template-columns: 1fr; }
  .about-news-card__title { font-size: 1rem; }
  .about-news-admin {
    padding: 14px;
  }
  .about-news-admin__layout,
  .about-news-admin__grid {
    grid-template-columns: 1fr;
  }
  .solutions-grid { grid-template-columns: 1fr 1fr; }
  .tools-grid { grid-template-columns: 1fr 1fr; }
  .geo3d-showcase__head {
    grid-template-columns: 1fr;
    align-items: start;
  }
  .geo3d-showcase__head .btn {
    width: fit-content;
  }
  .geo3d-feature-card,
  .geo3d-feature-card:nth-child(4),
  .geo3d-feature-card:nth-child(5) {
    grid-column: 1 / -1;
  }
  .geo3d-showcase__main-shot img {
    min-height: 260px;
  }
  .home-news-grid { grid-template-columns: 1fr; }
  .home-news-card { min-height: 320px; }
  .home-clients-section { padding: 64px 0 58px; }
  .home-clients-head { margin-bottom: 28px; }
  .home-clients-head .eyebrow { font-size: 0.95rem; }
  .home-clients-head h2 { font-size: 2rem; }
  .home-clients-bulk-admin {
    padding: 12px;
    margin-bottom: 20px;
  }
  .home-clients-bulk-row {
    gap: 8px;
  }
  .home-clients-bulk-row select {
    flex: 1 1 140px;
    min-width: 120px;
  }
  .home-clients-bulk-row button {
    flex: 0 0 auto;
  }
  .home-clients-logo-list {
    grid-template-columns: 1fr;
    max-height: 260px;
  }
  .home-clients-marquee-track {
    gap: 18px;
    padding-left: 10px;
  }
  .home-clients-marquee-track--offset {
    margin-top: 14px;
    padding-left: 54px;
  }
  .home-client-item {
    min-width: 122px;
    height: 46px;
    padding: 8px 12px;
  }
  .home-client-item img {
    max-height: 24px;
    max-width: 98px;
  }
  .home-client-text {
    font-size: 0.82rem;
  }
}

@media (max-width: 480px) {
  .solutions-grid { grid-template-columns: 1fr; }
  .tools-grid { grid-template-columns: 1fr; }
  .geo3d-showcase__copy {
    padding: 22px 18px;
  }
  .geo3d-showcase__logo {
    width: 172px;
  }
  .geo3d-showcase__head .btn {
    width: 100%;
  }
}

/* --- 18. SOLUTIONS GRID (行业解决方案) --- */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.solution-card {
  position: relative;
  background: var(--bg-mid);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--r-md);
  overflow: hidden;
  isolation: isolate;
  min-height: 420px;
  text-decoration: none;
  color: #fff;
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
  --card-overlay-bg: rgba(9, 23, 41, 0.56);
  --card-overlay-fg: #ffffff;
  --card-overlay-muted: rgba(255,255,255,0.84);
  --card-overlay-border: rgba(255,255,255,0.20);
  --card-overlay-chip-bg: rgba(255,255,255,0.14);
  --card-overlay-chip-fg: rgba(255,255,255,0.94);
}
.solution-card[data-contrast="light"] {
  --card-overlay-bg: rgba(247, 250, 252, 0.68);
  --card-overlay-fg: #0f172a;
  --card-overlay-muted: rgba(15, 23, 42, 0.84);
  --card-overlay-border: rgba(15, 23, 42, 0.16);
  --card-overlay-chip-bg: rgba(15, 23, 42, 0.08);
  --card-overlay-chip-fg: #0f172a;
}
.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
  border-color: var(--accent);
}
.solution-card__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}
.solution-card__img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to top,
    rgba(7, 16, 31, 0.44) 0%,
    rgba(7, 16, 31, 0.16) 45%,
    rgba(7, 16, 31, 0) 72%
  );
  pointer-events: none;
}
.solution-card__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform 0.5s ease;
}
.solution-card:hover .solution-card__img img {
  transform: scale(1.05);
}
.solution-card__content {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  padding: 20px 22px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--card-overlay-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-top: 1px solid var(--card-overlay-border);
}
.solution-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0;
  color: var(--card-overlay-fg);
}
.solution-card p {
  font-size: 0.875rem;
  line-height: 1.65;
  color: var(--card-overlay-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.solution-card__cases {
  margin-top: 2px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.solution-card__case-tag {
  font-size: 0.75rem;
  background: var(--card-overlay-chip-bg);
  color: var(--card-overlay-chip-fg);
  padding: 3px 10px;
  border-radius: 100px;
  border: 1px solid var(--card-overlay-border);
}
.solution-card:hover .solution-card__case-tag {
  background: rgba(244,184,70,0.16);
  border-color: rgba(244,184,70,0.34);
  color: var(--accent);
}
.solution-card__arrow {
  margin-top: 4px;
  font-size: 0.9rem;
  color: var(--card-overlay-muted);
  transition: color var(--tr), transform var(--tr);
}
.solution-card:hover .solution-card__arrow {
  color: var(--accent);
  transform: translateX(4px);
}

@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .solution-card__content,
  .project-card__body {
    background: rgba(9, 23, 41, 0.72);
  }
  .solution-card[data-contrast="light"] .solution-card__content,
  .project-card[data-contrast="light"] .project-card__body {
    background: rgba(247, 250, 252, 0.86);
  }
}

@media (max-width: 768px) {
  .solution-card { min-height: 340px; }
  .project-card { min-height: 240px; }
  .solution-card__content,
  .project-card__body {
    padding: 16px 16px;
  }
}

/* --- 19. TOOLS GRID (自研工具产品) --- */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.tool-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-white);
  border: 1px solid var(--line-200);
  border-radius: var(--r-md);
  padding: 28px 24px 20px;
  text-decoration: none;
  color: var(--ink-900);
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
}
.tool-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--accent);
}
.tool-card__logo {
  margin-bottom: 16px;
}
.tool-card__logo img {
  height: 36px;
  width: auto;
}
.tool-card__body {
  flex: 1;
}
.tool-card__body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink-900);
  margin-bottom: 4px;
}
.tool-card__sub {
  font-size: 0.8rem;
  color: var(--ink-400);
  margin-bottom: 10px;
  font-weight: 500;
}
.tool-card__body p {
  font-size: 0.875rem;
  color: var(--ink-600);
  line-height: 1.6;
}
.tool-card__footer {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.tool-card__tag {
  font-size: 0.7rem;
  background: var(--bg-cool);
  color: var(--ink-500);
  padding: 3px 10px;
  border-radius: 100px;
  font-weight: 500;
}
.tool-card:hover .tool-card__tag {
  background: var(--accent-light);
  color: var(--accent);
}

/* --- 19.1 GEO3D PRODUCT SHOWCASE --- */
.geo3d-showcase {
  position: relative;
  overflow: hidden;
  background:
    linear-gradient(rgba(30,118,185,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,118,185,0.05) 1px, transparent 1px),
    linear-gradient(180deg, #f9fbfb 0%, #edf4f2 100%);
  background-size: 30px 30px, 30px 30px, auto;
}

.geo3d-showcase__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: end;
  margin-bottom: 30px;
}

.geo3d-showcase__head h2 {
  margin: 0;
}

.geo3d-showcase__head p {
  max-width: 760px;
  margin-top: 12px;
  color: var(--ink-500);
}

.geo3d-showcase__hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.78fr) minmax(0, 1.22fr);
  gap: 28px;
  align-items: stretch;
  margin-bottom: 22px;
}

.geo3d-showcase__copy,
.geo3d-showcase__main-shot,
.geo3d-feature-card {
  border: 1px solid rgba(21,37,50,0.12);
  border-radius: var(--r-md);
  background: rgba(255,255,255,0.78);
  box-shadow: 0 18px 44px rgba(21,37,50,0.08);
}

.geo3d-showcase__copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(24px, 3vw, 38px);
}

.geo3d-showcase__logo {
  width: min(196px, 58%);
  height: auto;
  margin-bottom: 24px;
}

.geo3d-showcase__copy h3 {
  font-size: clamp(1.5rem, 2.4vw, 2.18rem);
  line-height: 1.22;
  margin: 0;
}

.geo3d-showcase__copy p {
  margin-top: 16px;
  color: var(--ink-500);
  line-height: 1.8;
}

.geo3d-showcase__summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.geo3d-showcase__summary span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid rgba(30,118,185,0.18);
  border-radius: 999px;
  background: rgba(30,118,185,0.08);
  color: var(--accent-dark);
  font-size: 0.82rem;
  font-weight: 700;
}

.geo3d-showcase__main-shot {
  overflow: hidden;
  margin: 0;
  background: #152532;
}

.geo3d-showcase__main-shot img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  object-position: center;
}

.geo3d-feature-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 18px;
}

.geo3d-feature-card {
  grid-column: span 2;
  overflow: hidden;
}

.geo3d-feature-card:nth-child(4),
.geo3d-feature-card:nth-child(5) {
  grid-column: span 3;
}

.geo3d-feature-card img {
  display: block;
  width: 100%;
  aspect-ratio: 1339 / 638;
  object-fit: cover;
  object-position: center;
  border-bottom: 1px solid rgba(21,37,50,0.1);
}

.geo3d-feature-card div {
  padding: 20px 22px 24px;
}

.geo3d-feature-card span {
  color: rgba(21,37,50,0.34);
  font-family: var(--font-latin);
  font-size: 1.35rem;
  font-weight: 700;
}

.geo3d-feature-card h3 {
  margin: 8px 0 10px;
  font-size: 1.08rem;
}

.geo3d-feature-card p {
  color: var(--ink-500);
  font-size: 0.9rem;
  line-height: 1.72;
}

/* --- 20. CASE THUMBNAIL GRID (典型业绩缩略图) --- */
.cases-thumb-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.case-thumb {
  display: block;
  background: #fff;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--ink-100);
  text-decoration: none;
  color: var(--ink-900);
  transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
}
.case-thumb:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.1);
  border-color: var(--accent);
}
.case-thumb__img {
  width: 100%;
  height: 140px;
  overflow: hidden;
}
.case-thumb__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top left;
  transition: transform 0.5s ease;
}
.case-thumb:hover .case-thumb__img img {
  transform: scale(1.05);
}
.case-thumb__info {
  padding: 14px 16px;
}
.case-thumb__info h4 {
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 4px;
  color: var(--ink-900);
}
.case-thumb__info p {
  font-size: 0.78rem;
  color: var(--ink-500);
  line-height: 1.4;
}
@media (max-width: 768px) {
  .cases-thumb-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- 21.1 工程学妹视觉体系刷新 --- */
.section,
.page-hero,
.footer,
.map-section,
.logo-marquee-section,
.cert-gallery-section,
.home-news-section,
.home-clients-section,
.about-news-section {
  position: relative;
}

.site-header {
  background: rgba(251,253,251,0.88);
  border-bottom: 1px solid rgba(255,255,255,0.72);
  box-shadow: 0 10px 34px rgba(21,37,50,0.08);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.site-logo img {
  height: 34px;
}

.site-nav a {
  color: rgba(21,37,50,0.72);
  font-weight: 700;
}

.site-nav a:hover {
  color: var(--accent-dark);
}

.site-nav a.active {
  color: var(--ink-900);
  background: rgba(30,118,185,0.10);
  border: 1px solid rgba(30,118,185,0.12);
}

.hero:not(.hero--banner),
.page-hero,
.cases-hero {
  background:
    linear-gradient(rgba(30,118,185,0.075) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,118,185,0.075) 1px, transparent 1px),
    linear-gradient(135deg, #fbf7ee 0%, #f7faf9 48%, #e8f4f7 100%) !important;
  background-size: 32px 32px, 32px 32px, auto !important;
  color: var(--ink-700);
}

.hero:not(.hero--banner)::before,
.hero:not(.hero--banner)::after,
.cases-hero::before,
.map-section::before {
  display: none;
}

.hero:not(.hero--banner) h1,
.page-hero h1,
.cases-hero h1 {
  color: var(--ink-900) !important;
}

.hero:not(.hero--banner) h1 em {
  color: var(--accent-dark);
}

.hero:not(.hero--banner) p.lead,
.page-hero .lead,
.cases-hero .lead {
  color: var(--ink-600) !important;
}

.cases-hero .stat-label {
  color: var(--ink-500) !important;
}

.breadcrumb,
.breadcrumb a {
  color: rgba(21,37,50,0.56);
}

.breadcrumb a:hover {
  color: var(--accent-dark);
}

.hero.hero--banner {
  background: #f8fbfb;
}

.hero-slide-visual img[src*="hero_coming_soon_collage"] {
  object-fit: contain;
  object-position: center;
  padding: 12px clamp(28px, 4vw, 64px);
  background:
    linear-gradient(rgba(30,118,185,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,118,185,0.04) 1px, transparent 1px),
    linear-gradient(90deg, #fbf7ee 0%, #f8fbfb 58%, #e8f4f7 100%);
  background-size: 32px 32px, 32px 32px, auto;
  filter: none;
}

.page-hero {
  padding: 58px 0 54px;
}

.cases-hero {
  padding: 88px 0 48px !important;
}

.map-section,
.logo-marquee-section,
.admin-client-section {
  padding-block: 64px;
}

.section--white,
.section--cool,
.section--navy,
.home-news-section,
.home-clients-section,
.about-news-section,
.logo-marquee-section,
.cert-gallery-section,
.admin-client-section {
  background:
    linear-gradient(rgba(30,118,185,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,118,185,0.045) 1px, transparent 1px),
    linear-gradient(180deg, rgba(251,253,251,0.96) 0%, rgba(238,241,237,0.92) 100%);
  background-size: 32px 32px, 32px 32px, auto;
  color: var(--ink-700);
}

.section--navy h1,
.section--navy h2,
.section--navy h3,
.section--navy h4,
.section--navy .section-head p {
  color: var(--ink-900);
}

.section--navy .section-head p,
.section-head p,
.map-section .section-head p {
  color: var(--ink-600);
}

.eyebrow,
.section--navy .eyebrow,
.map-section .eyebrow,
.home-clients-head .eyebrow {
  color: var(--accent-dark) !important;
  font-family: var(--font-latin), var(--font);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
}

.btn,
button,
input,
textarea,
select {
  font-family: var(--font);
}

.btn--primary {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
}

.btn--primary:hover {
  background: #0b4d87;
  border-color: #0b4d87;
  box-shadow: 0 12px 28px rgba(15,94,168,0.24);
}

.btn--secondary,
.btn--ghost {
  background: rgba(255,255,255,0.72);
  color: var(--ink-800);
  border-color: rgba(21,37,50,0.16);
}

.btn--secondary:hover,
.btn--ghost:hover {
  background: rgba(255,255,255,0.92);
  border-color: rgba(15,94,168,0.34);
  color: var(--accent-dark);
}

.btn--text {
  color: var(--accent-dark);
}

.stats-bar,
.capability-card,
.product-detail-head,
.product-mini-card,
.cert-card,
.tech-row,
.industry-card,
.client-logo-item,
.home-clients-bulk-admin,
.home-client-item,
.experience-card,
.demo-form-wrap,
.about-stat,
.value-item,
.about-news-card,
.about-news-admin,
.about-news-admin__sidebar,
.about-news-admin__editor,
.case-card-v2,
.facts-card,
.value-box,
.tool-card,
.case-thumb,
.admin-form-wrap,
.cert-gallery-admin,
.cert-media-card {
  background: rgba(255,255,255,0.82);
  border-color: rgba(21,37,50,0.12);
  box-shadow: 0 12px 36px rgba(21,37,50,0.06);
}

.capability-card:hover,
.product-mini-card:hover,
.cert-card:hover,
.industry-card:hover,
.experience-card:hover,
.about-stat:hover,
.value-item:hover,
.client-logo-item:hover,
.tool-card:hover,
.case-card-v2:hover,
.about-news-card:hover,
.case-thumb:hover {
  background: rgba(255,255,255,0.96);
  border-color: rgba(30,118,185,0.34);
  box-shadow: 0 18px 46px rgba(21,37,50,0.10);
}

.stats-bar__num,
.cert-num,
.about-stat__num,
.capability-card__num,
.cases-hero .stat-num {
  color: var(--accent-dark);
  background: none;
  -webkit-text-fill-color: currentColor !important;
}

.product-badge,
.product-mini-icon,
.facts-card__header {
  background: var(--ink-900);
  color: #fff;
}

.feature-tag,
.tech-row__tags span,
.tool-card__tag,
.project-card__tag,
.solution-card__case-tag {
  border-color: rgba(30,118,185,0.16);
  background: rgba(30,118,185,0.07);
  color: var(--accent-dark);
}

.project-card,
.solution-card {
  border-color: rgba(21,37,50,0.14);
  box-shadow: 0 14px 42px rgba(21,37,50,0.10);
  --card-overlay-bg: rgba(21,37,50,0.44);
  --card-overlay-fg: #ffffff;
  --card-overlay-muted: rgba(255,255,255,0.86);
  --card-overlay-border: rgba(255,255,255,0.18);
  --card-overlay-chip-bg: rgba(255,255,255,0.12);
  --card-overlay-chip-fg: rgba(255,255,255,0.96);
}

.project-card:hover,
.solution-card:hover {
  border-color: rgba(30,118,185,0.42);
  box-shadow: 0 22px 56px rgba(21,37,50,0.16);
}

.solution-card:hover .solution-card__case-tag,
.tool-card:hover .tool-card__tag {
  background: rgba(244,184,70,0.16);
  border-color: rgba(244,184,70,0.34);
  color: #7a5410;
}

.filter-bar {
  background: rgba(251,253,251,0.88) !important;
  border-bottom-color: rgba(21,37,50,0.10) !important;
  box-shadow: 0 8px 24px rgba(21,37,50,0.05);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.filter-tab {
  background: rgba(255,255,255,0.82) !important;
  border-color: rgba(21,37,50,0.14) !important;
  color: var(--ink-700) !important;
}

.filter-tab:hover,
.filter-tab.active {
  background: rgba(30,118,185,0.10) !important;
  color: var(--accent-dark) !important;
  border-color: rgba(30,118,185,0.32) !important;
}

.marquee-item img {
  filter: none;
  opacity: 1;
}

.form-group input,
.form-group select,
.form-group textarea,
.about-news-admin__field input,
.about-news-admin__field textarea,
.home-clients-bulk-admin textarea,
.home-clients-bulk-row select,
.admin-form-group input,
.admin-form-group select {
  background: rgba(255,255,255,0.9);
  border-color: rgba(21,37,50,0.14);
  color: var(--ink-800);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus,
.about-news-admin__field input:focus,
.about-news-admin__field textarea:focus,
.home-clients-bulk-admin textarea:focus,
.admin-form-group input:focus,
.admin-form-group select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(30,118,185,0.12);
}

.footer {
  background:
    linear-gradient(rgba(30,118,185,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30,118,185,0.04) 1px, transparent 1px),
    linear-gradient(180deg, #eef1ed 0%, #fbf7ee 100%);
  background-size: 32px 32px, 32px 32px, auto;
  color: var(--ink-600);
  border-top: 1px solid rgba(21,37,50,0.10);
}

.footer__grid {
  border-bottom-color: rgba(21,37,50,0.10);
}

.footer__brand .site-logo--text,
.footer__col h4 {
  color: var(--ink-900);
}

.footer__brand p,
.footer__links a,
.footer__bottom {
  color: var(--ink-600);
}

.footer__links a:hover {
  color: var(--accent-dark);
}