/* ═══════════════════════════════════════════
   楚智咨询 | 品牌蓝绿色系 · 高端商务风格
   Primary: #0D8ABC → #149187 → #4CB848
   ═══════════════════════════════════════════ */

:root {
  /* ── Brand Colors (matching logo) ── */
  --primary: #0D8ABC;
  --primary-dark: #0A6A96;
  --primary-deep: #064E6F;
  --secondary: #149187;
  --accent: #4CB848;
  --accent-light: #6BC767;
  
  /* ── Neutrals ── */
  --white: #FFFFFF;
  --gray-50: #F8FAFB;
  --gray-100: #EEF2F5;
  --gray-200: #DFE6EB;
  --gray-300: #C2CED9;
  --gray-400: #8FA3B5;
  --gray-500: #6B7F8E;
  --gray-600: #4A5D6B;
  --gray-700: #2D3C47;
  --gray-800: #1A252D;
  --gray-900: #0F171C;
  
  /* ── Gradients ── */
  --brand-gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
  --brand-gradient-subtle: linear-gradient(135deg, rgba(13,138,188,0.04) 0%, rgba(20,145,135,0.03) 100%);
  --hero-gradient: linear-gradient(160deg, var(--primary-deep) 0%, var(--primary) 40%, var(--secondary) 100%);
  --card-hover-glow: 0 8px 32px rgba(13,138,188,0.12);
  
  /* ── Typography & Spacing ── */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-serif: Georgia, 'Noto Serif SC', 'Source Han Serif SC', serif;
  --shadow-sm: 0 1px 4px rgba(15,23,28,0.05);
  --shadow-md: 0 4px 16px rgba(15,23,28,0.08);
  --shadow-lg: 0 8px 32px rgba(15,23,28,0.10);
  --shadow-xl: 0 16px 48px rgba(15,23,28,0.12);
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
}

/* ── Reset ── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color 0.2s; }
ul { list-style: none; }
.container { max-width: 1160px; margin: 0 auto; padding: 0 28px; }

/* ═══ NAV ═══ */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 18px 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  /* 与Hero区轻微区隔：半透明深色底 */
  background: rgba(6,78,111,0.25);
  backdrop-filter: blur(8px);
}
#navbar.scrolled {
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(16px) saturate(1.8);
  padding: 12px 0;
  box-shadow: 0 1px 20px rgba(15,23,28,0.06);
}
.nav-inner {
  max-width: 1160px; margin: 0 auto; padding: 0 28px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo-link { display: flex; align-items: center; }
.logo-img {
  height: 38px; width: auto;
  transition: opacity 0.25s;
}
/* 双logo切换：透明导航显示白色logo，滚动后显示彩色logo */
.logo-color { opacity: 0; position: absolute; }
#navbar:not(.scrolled) .logo-white { opacity: 1; }
#navbar:not(.scrolled) .logo-color { opacity: 0; }
#navbar.scrolled .logo-white { opacity: 0; }
#navbar.scrolled .logo-color { opacity: 1; }
.logo-link:hover .logo-img { opacity: 0.85; }
.nav-links {
  display: flex; gap: 36px; align-items: center;
}
.nav-links a {
  font-size: 14px; font-weight: 500;
  color: rgba(255,255,255,0.88);
  transition: all 0.25s;
  position: relative;
}
.nav-links a:not(.nav-cta)::after {
  content: ''; position: absolute; bottom: -4px; left: 0; width: 0;
  height: 2px; background: var(--white); border-radius: 1px;
  transition: width 0.25s ease;
}
#navbar:not(.scrolled) .nav-links a:hover { color: var(--white); }
#navbar:not(.scrolled) .nav-links a:hover::after { width: 100%; }
.nav-label {
  font-size: 14px; font-weight: 500;
  color: rgba(255,255,255,0.88);
  cursor: default; user-select: none;
}
#navbar.scrolled .nav-links a { color: var(--gray-600); }
#navbar.scrolled .nav-links a:hover,
#navbar.scrolled .nav-links a.active { color: var(--primary); }
#navbar.scrolled .nav-links a:not(.nav-cta)::after { background: var(--primary); }
#navbar.scrolled .nav-label { color: var(--gray-600); }
.nav-cta {
  background: var(--white) !important;
  color: var(--primary) !important;
  padding: 9px 22px; border-radius: var(--radius-sm);
  font-weight: 600 !important;
  font-size: 13px !important;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s !important;
}
.nav-cta:hover { 
  transform: translateY(-1px); 
  box-shadow: 0 4px 14px rgba(13,138,188,0.25) !important; 
}
.hamburger {
  display: none; background: none; border: none; cursor: pointer;
  flex-direction: column; gap: 5px;
}
.hamburger span { display: block; width: 24px; height: 2px; background: var(--white); border-radius: 1px; transition: all 0.3s; }

/* ═══ HERO CAROUSEL ═══ */
#hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.hero-carousel {
  position: absolute; inset: 0; z-index: 0;
}
.hero-slide {
  position: absolute; inset: 0;
  opacity: 0; transition: opacity 1s ease-in-out;
  display: flex; align-items: center; justify-content: center;
}
.hero-slide.active { opacity: 1; z-index: 1; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(
    180deg,
    rgba(15,23,28,0.45) 0%,
    rgba(15,23,28,0.30) 40%,
    rgba(15,23,28,0.55) 100%
  );
}
.carousel-dots {
  position: absolute; bottom: 80px; left: 50%;
  transform: translateX(-50%);
  display: flex; gap: 10px; z-index: 3;
}
.dot {
  width: 8px; height: 8px; border-radius: 4px;
  background: rgba(255,255,255,0.3);
  cursor: pointer; transition: all 0.3s;
}
.dot.active { 
  width: 28px; background: rgba(255,255,255,0.85); 
}
.hero-slide-content {
  position: relative; z-index: 2;
  text-align: center; padding: 120px 24px 80px;
  max-width: 760px;
}
.hero-title {
  font-size: 44px; font-weight: 800; color: var(--white);
  line-height: 1.2; margin-bottom: 18px;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.hero-subtitle {
  font-size: 19px; color: rgba(255,255,255,0.68);
  font-weight: 300; line-height: 1.6;
}
.hero-actions {
  display: flex; gap: 16px; justify-content: center;
  margin-top: 32px; flex-wrap: wrap;
}
.hero-btn {
  display: inline-block; padding: 14px 36px; border-radius: 8px;
  font-size: 15px; font-weight: 600; text-decoration: none;
  transition: all 0.25s;
}
.hero-btn-primary {
  background: #fff; color: #064E6F;
}
.hero-btn-primary:hover { background: rgba(255,255,255,0.88); transform: translateY(-1px); }
.hero-btn-outline {
  color: #fff; border: 1.5px solid rgba(255,255,255,0.4);
}
.hero-btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-1px); }
.hero-scroll-hint {
  position: absolute; bottom: 36px; left: 50%;
  transform: translateX(-50%); z-index: 3;
}
.scroll-line {
  width: 1px; height: 44px; background: rgba(255,255,255,0.3);
  animation: scrollPulse 2.2s ease-in-out infinite;
  border-radius: 1px;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; height: 44px; transform: scaleY(1); }
  50% { opacity: 0.8; height: 56px; transform: scaleY(1); }
}

/* ═══ AI 智能体区 ═══ */
#ai-assistant {
  padding: 88px 0;
  background: var(--white);
  position: relative;
}
#ai-assistant::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px; background: linear-gradient(90deg, transparent, rgba(13,138,188,0.15), transparent);
}
.ai-section-inner {
  display: grid; grid-template-columns: 1fr 1.1fr;
  gap: 48px; align-items: center;
  max-width: 1080px; margin: 0 auto;
}
.ai-intro { text-align: left; }
.ai-badge {
  display: inline-block; padding: 4px 12px; border-radius: 4px;
  font-size: 10px; font-weight: 700; letter-spacing: 1.5px;
  text-transform: uppercase;
  background: rgba(13,138,188,0.06);
  color: var(--primary-dark); margin-bottom: 16px;
}
.ai-intro h2 {
  font-family: var(--font);
  font-size: 32px; font-weight: 700;
  color: var(--gray-900); line-height: 1.25; margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.ai-subtitle-en {
  font-size: 14px; color: var(--gray-400); 
  font-weight: 400; margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.ai-subtitle-cn {
  font-size: 15px; color: var(--gray-500); line-height: 1.7;
  margin-bottom: 0; max-width: 360px;
}

.chat-container {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 4px 28px rgba(13,138,188,0.10), 0 1px 4px rgba(15,23,28,0.04);
  overflow: hidden;
  border: 1px solid rgba(13,138,188,0.12);
}
.chat-header-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px;
  background: linear-gradient(135deg, #0D8ABC 0%, #149187 100%);
  color: var(--white);
}
.chat-header-title { font-size: 13px; font-weight: 600; letter-spacing: 0.2px; }
.chat-status {
  display: flex; align-items: center; gap: 6px;
  font-size: 11px; color: rgba(255,255,255,0.55);
}
.status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #4ADE80; display: inline-block;
  box-shadow: 0 0 6px rgba(74,222,128,0.5);
}
#chatMessages.chat-messages {
  min-height: 300px; max-height: 380px;
  background: var(--gray-50);
  overflow-y: auto;
  padding: 24px 28px;
}
.chat-input-area {
  display: flex; padding: 12px 16px;
  gap: 8px; border-top: 1px solid var(--gray-200);
  background: var(--white);
}
.chat-input {
  flex: 1; border: none;
  padding: 10px 0;
  font-size: 14px; outline: none;
  font-family: var(--font);
  background: transparent;
}
.chat-input::placeholder { color: var(--gray-400); }
.chat-send-btn {
  padding: 10px 22px; border: none; border-radius: 6px;
  background: linear-gradient(135deg, #0D8ABC, #149187); color: var(--white);
  font-size: 13px; font-weight: 600; cursor: pointer;
  transition: all 0.2s, transform 0.15s;
  white-space: nowrap;
}
.chat-send-btn:hover { background: linear-gradient(135deg, #0A6A96, #0F7B6F); transform: translateY(-1px); }

/* Chat messages (shared with chat-widget.js) */
.chat-msg {
  margin-bottom: 12px; padding: 12px 18px;
  border-radius: 10px; font-size: 14px; line-height: 1.8;
  max-width: 94%; white-space: pre-wrap; word-break: break-word;
}
.chat-msg.bot {
  background: var(--white); color: var(--gray-700);
  border: 1px solid rgba(13,138,188,0.08);
}
.chat-msg.user {
  background: linear-gradient(135deg, #0D8ABC, #149187);
  color: var(--white); margin-left: auto;
}
.action-card {
  background: var(--white); border: 1px solid var(--primary);
  border-radius: var(--radius); padding: 12px 16px; margin-bottom: 10px;
}
.action-card-title { font-weight: 600; font-size: 14px; color: var(--gray-900); margin-bottom: 4px; }
.action-card-btn {
  background: var(--primary); color: var(--white); border: none;
  padding: 6px 16px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600; cursor: pointer;
  margin-top: 8px; transition: background 0.2s;
}
.action-card-btn:hover { background: var(--primary-dark); }

/* ═══ 问题洞察 ═══ */
#pain {
  padding: 100px 0 110px;
  background: var(--gray-50);
}
.pain-header { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.pain-eyebrow {
  display: inline-block; font-size: 10px; font-weight: 700;
  letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--primary-dark);
  margin-bottom: 16px;
  padding: 4px 12px; border-radius: 3px;
  background: rgba(13,138,188,0.06);
}
.pain-main-title {
  font-size: 28px; font-weight: 700;
  color: var(--gray-900); line-height: 1.35; margin-bottom: 12px;
}
.pain-lead { font-size: 15px; color: var(--gray-500); line-height: 1.7; }

.insight-model {
  max-width: 960px; margin: 0 auto;
}
.model-core {
  display: flex; align-items: center; gap: 40px;
  margin-bottom: 48px;
  justify-content: center;
}
.core-visual { flex-shrink: 0; }
.core-ring {
  width: 96px; height: 96px; border-radius: 50%;
  border: 2px solid var(--gray-300);
  display: flex; align-items: center; justify-content: center;
  position: relative;
  background: var(--white);
}
.core-ring::before {
  content: ''; position: absolute; inset: -6px;
  border-radius: 50%; border: 1px dashed rgba(13,138,188,0.25);
}
.core-ring::after {
  content: ''; position: absolute; inset: -14px;
  border-radius: 50%; border: 1px solid rgba(13,138,188,0.08);
}
.core-ring-label {
  font-size: 13px; font-weight: 700; color: var(--primary);
  letter-spacing: 0.5px; text-align: center; line-height: 1.4;
}
.core-text strong {
  font-size: 18px; font-weight: 700; color: var(--gray-900);
  line-height: 1.5; display: block; margin-bottom: 10px;
}
.core-text p {
  font-size: 14px; color: var(--gray-500); line-height: 1.7; margin: 0;
  max-width: 520px;
}

.model-dimensions {
  display: grid; grid-template-columns: repeat(2, 1fr);
  gap: 16px; margin-bottom: 36px;
}
.dimension-card {
  background: var(--white); border: 1px solid var(--gray-200);
  border-radius: 10px; padding: 24px 28px;
  display: flex; gap: 18px; align-items: flex-start;
  transition: all 0.25s ease;
}
.dimension-card:hover {
  border-color: rgba(13,138,188,0.3);
  box-shadow: 0 4px 20px rgba(13,138,188,0.06);
  transform: translateY(-1px);
}
.dim-icon {
  flex-shrink: 0; width: 46px; height: 46px;
  border-radius: 10px; background: var(--gray-50);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); transition: all 0.25s;
}
.dimension-card:hover .dim-icon {
  background: rgba(13,138,188,0.08);
  color: var(--primary-dark);
}
.dim-content h3 {
  font-size: 15px; font-weight: 700; color: var(--gray-900);
  margin-bottom: 6px; line-height: 1.3;
}
.dim-content p {
  font-size: 13px; color: var(--gray-500); line-height: 1.65; margin: 0;
}

.model-footer-note {
  text-align: center; max-width: 680px; margin: 0 auto;
  padding: 28px 32px;
  border-top: 1px solid var(--gray-200);
}
.model-footer-note p {
  font-size: 14px; color: var(--gray-500); line-height: 1.75; margin: 0;
}
.model-footer-note strong { color: var(--primary); }

/* ═══ 解决方案（卡片式）═══ */
#solution {
  padding: 100px 0;
  background: var(--gray-50);
}
.solution-header { text-align: center; max-width: 600px; margin: 0 auto 56px; }
.solution-header h2 {
  font-family: var(--font-serif); font-size: 32px;
  color: var(--gray-900); margin-bottom: 12px; font-weight: 700;
}
.solution-header p { font-size: 16px; color: var(--gray-500); }

.solution-cards {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.solution-card {
  display: flex; flex-direction: column;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: 36px 30px;
  transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  position: relative; overflow: hidden;
  text-decoration: none; color: inherit;
}
.solution-card:hover {
  border-color: transparent;
  box-shadow: var(--shadow-xl);
  transform: translateY(-6px);
}
.solution-card.featured {
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(13,138,188,0.10);
}
.solution-card.featured:hover {
  box-shadow: 0 12px 40px rgba(13,138,188,0.18);
}
.card-badge {
  position: absolute; top: 18px; right: 18px;
  padding: 4px 12px; border-radius: 20px;
  background: var(--brand-gradient); color: var(--white);
  font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
}
.card-icon-wrap {
  width: 56px; height: 56px; border-radius: 14px;
  background: linear-gradient(135deg, rgba(13,138,188,0.08), rgba(76,184,72,0.06));
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 22px; color: var(--primary);
  transition: all 0.3s;
}
.solution-card:hover .card-icon-wrap {
  background: var(--brand-gradient); color: var(--white);
  transform: scale(1.05);
}
.card-body h3 {
  font-size: 20px; font-weight: 700;
  color: var(--gray-900); margin-bottom: 10px;
}
.card-body p {
  font-size: 14px; color: var(--gray-500); line-height: 1.65;
  margin-bottom: 18px;
}
.card-tags {
  display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 20px;
}
.card-tags li {
  font-size: 12px; padding: 4px 11px; border-radius: 20px;
  background: var(--gray-100); color: var(--gray-600);
  font-weight: 500;
}
.card-action {
  margin-top: auto; display: flex; align-items: center;
  gap: 8px; font-size: 14px; font-weight: 600; color: var(--primary);
  padding-top: 18px; border-top: 1px solid var(--gray-100);
}
.arrow-icon {
  transition: transform 0.3s;
  font-size: 18px;
}
.solution-card:hover .arrow-icon { transform: translateX(4px); }

/* ═══ AI 专家团队 ═══ */
#ai-experts {
  padding: 100px 0;
  background: linear-gradient(180deg, var(--white) 0%, var(--gray-50) 100%);
  position: relative;
}
#ai-experts::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px; background: linear-gradient(90deg, transparent, rgba(13,138,188,0.15), transparent);
}
.experts-header { text-align: center; max-width: 680px; margin: 0 auto 56px; }
.experts-eyebrow {
  display: inline-block; font-size: 10px; font-weight: 700;
  letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--primary-dark);
  margin-bottom: 16px;
  padding: 4px 12px; border-radius: 3px;
  background: rgba(13,138,188,0.06);
}
.experts-header h2 {
  font-size: 28px; font-weight: 700; color: var(--gray-900);
  line-height: 1.35; margin-bottom: 12px;
}
.experts-header p {
  font-size: 15px; color: var(--gray-500); line-height: 1.7;
}

.experts-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  max-width: 1160px; margin: 0 auto;
}
.expert-card {
  background: var(--white);
  border: 1px solid rgba(13,138,188,0.10);
  border-radius: 14px;
  padding: 28px 20px 24px;
  display: flex; flex-direction: column;
  align-items: center; text-align: center;
  transition: all 0.35s cubic-bezier(0.4,0,0.2,1);
  position: relative;
  overflow: hidden;
}
.expert-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0;
  transition: opacity 0.35s;
}
.expert-card:hover {
  border-color: rgba(13,138,188,0.30);
  box-shadow: 0 8px 32px rgba(13,138,188,0.10);
  transform: translateY(-4px);
}
.expert-card:hover::before { opacity: 1; }

.expert-icon-wrap {
  width: 52px; height: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(13,138,188,0.08), rgba(20,145,135,0.05));
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  margin-bottom: 18px;
  transition: all 0.35s;
}
.expert-card:hover .expert-icon-wrap {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: var(--white);
  box-shadow: 0 6px 20px rgba(13,138,188,0.25);
}
.expert-name-cn {
  font-size: 15.5px; font-weight: 700; color: var(--gray-900);
  margin-bottom: 4px; line-height: 1.25;
  letter-spacing: -0.01em;
}
.expert-name-en {
  font-size: 11px; color: var(--gray-400);
  font-weight: 500; margin-bottom: 14px;
  letter-spacing: 0.3px;
}
.expert-desc {
  font-size: 12.5px; color: var(--gray-500);
  line-height: 1.65; margin-bottom: 18px;
  flex: 1;
}
.expert-status {
  display: inline-block;
  font-size: 9.5px; font-weight: 600; letter-spacing: 0.8px;
  text-transform: uppercase;
  color: #16A34A;
  padding: 3px 11px; border-radius: 20px;
  background: rgba(22,163,74,0.07);
}

/* ═══ 关于我们 ═══ */
#about {
  padding: 120px 0 100px;
  background: var(--white);
}

/* 第一层：公司名标题 + 介绍（公司名最显眼） */
.about-lab-top {
  margin-bottom: 64px; padding-bottom: 56px;
  border-bottom: 1px solid var(--gray-200);
}
.lab-header {
  display: flex; align-items: baseline; gap: 16px;
  margin-bottom: 20px;
}
.lab-company-name {
  font-size: 36px; font-weight: 800; color: var(--gray-900);
  line-height: 1.25; letter-spacing: -0.5px;
  margin: 0;
}
.lab-year {
  font-size: 13px; color: var(--primary-dark);
  letter-spacing: 1px; font-weight: 600;
}
.lab-desc {
  font-size: 15px; color: var(--gray-600);
  line-height: 1.85; margin: 0;
}
.lab-desc strong { color: var(--primary-dark); font-weight: 600; }

/* 第二层：左右结构 Slogan + MVP卡片 */
.about-main-row {
  display: flex; align-items: flex-start;
  gap: 60px; margin-bottom: 88px;
}

/* 左侧：Slogan（口号，字号小于公司名） */
.about-slogan-col {
  flex: 1; max-width: 440px;
  position: relative; padding-left: 28px;
}
.about-slogan-rule {
  position: absolute; left: 0; top: 2px;
  width: 3px; height: 44px;
  background: var(--brand-gradient); border-radius: 2px;
}
.about-slogan-label {
  display: inline-block;
  font-size: 10px; font-weight: 700; letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--primary); opacity: 0.6;
  margin-bottom: 12px;
}
.about-slogan-title {
  font-size: 24px; font-weight: 800; color: var(--gray-900);
  line-height: 1.35; letter-spacing: -0.3px;
  margin: 0 0 18px;
  white-space: nowrap;
}
.about-slogan-desc {
  font-size: 16px; color: var(--gray-500);
  line-height: 1.8; margin: 0 0 24px;
}
.about-highlight-box {
  background: linear-gradient(135deg, #F7FBFC 0%, #EEF6F9 100%);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  position: relative;
}
.highlight-quote {
  font-family: Georgia, 'Times New Roman', serif;
  font-size: 44px; font-weight: 700; line-height: 1;
  color: rgba(13,138,188,0.08);
  position: absolute; top: 6px; left: 16px;
}
.about-highlight-box p {
  font-size: 16px; color: var(--gray-700);
  line-height: 1.65; margin: 0; font-weight: 500;
  position: relative; z-index: 1;
}
/* "治未病"颜色与组织健康描述一致 */
.about-highlight-box strong { color: var(--primary-dark); }

/* 右侧：MVP 纵向列表（无边框无卡片） */
.about-mvps-col {
  display: flex; flex-direction: column;
  gap: 28px; flex: 1;
  padding-top: 4px;
}
.mvp-item {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--gray-200);
}
.mvp-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.mvp-title-cn {
  font-size: 20px; font-weight: 700;
  margin: 0 0 10px; line-height: 1.4;
  display: inline-block;
  color: var(--white);
  background: var(--brand-gradient);
  padding: 5px 16px;
  border-radius: 6px;
}
.mvp-title-cn .mvp-label {
  display: inline;
  font-size: 11px; font-weight: 600; letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.65);
  margin-left: 8px;
  padding: 0; background: none;
}
.mvp-text {
  font-size: 14px; color: var(--gray-600);
  line-height: 1.7; margin: 0; font-weight: 400;
}

/* ═══ 理论根基 ═══ */
.theory-section {
  margin-top: 88px;
  padding-top: 64px;
  border-top: 1px solid var(--gray-200);
}
.theory-header {
  text-align: center; max-width: 640px;
  margin: 0 auto 56px;
}
.theory-eyebrow {
  display: inline-block; font-size: 10px; font-weight: 700;
  letter-spacing: 2.5px; text-transform: uppercase;
  color: var(--primary-dark);
  margin-bottom: 14px;
  padding: 5px 14px; border-radius: 4px;
  background: rgba(13,138,188,0.06);
}
.theory-header h3 {
  font-size: 24px; color: var(--gray-900); line-height: 1.4;
  font-weight: 700;
}

.theory-items {
  display: flex; align-items: flex-start;
  gap: 36px; justify-content: center;
}
.theory-item {
  flex: 1; max-width: 320px;
  text-align: center;
}
.theory-step-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--brand-gradient);
  color: var(--white);
  font-size: 14px; font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 18px;
  box-shadow: 0 4px 16px rgba(13,138,188,0.2);
}
.theory-item h4 {
  font-size: 16px; color: var(--gray-900);
  font-weight: 700; line-height: 1.35;
  margin-bottom: 6px;
}
.theory-sub {
  font-size: 13px; color: var(--gray-500);
  margin-bottom: 20px;
}
.theory-model-img {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 14px;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 2px 12px rgba(0,0,0,0.03);
  cursor: pointer;
}
.theory-model-img:hover {
  box-shadow: 0 8px 32px rgba(13,138,188,0.10);
  border-color: rgba(13,138,188,0.18);
}
.theory-model-img img {
  width: auto; height: auto;
  max-height: 200px;
  border-radius: 8px;
  display: block;
  margin: 0 auto;
}

/* Meta-Coaching 双模型图（上下排列） */
.theory-models-stack {
  display: flex; flex-direction: column;
  gap: 16px; align-items: center;
}
.theory-models-stack .theory-model-img {
  max-width: 280px;
}

.theory-divider {
  width: 1px; min-height: 200px;
  background: linear-gradient(180deg, transparent, var(--gray-200), transparent);
  flex-shrink: 0;
  align-self: center;
}

/* ═══ 客户Logo墙 ═══ */
#clients {
  padding: 80px 0 90px;
  background: var(--gray-50);
}
.client-logo-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 18px 20px; margin-bottom: 32px;
  align-items: center; justify-items: center;
}
.client-logo-item {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 10px;
  padding: 16px 14px;
  width: 100%; aspect-ratio: 16/10;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.3s ease;
}
.client-logo-item img {
  max-width: 80%; max-height: 80%;
  object-fit: contain; filter: grayscale(30%) opacity(0.75);
  transition: all 0.35s;
}
.client-logo-item:hover {
  transform: translateY(-2px);
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(13,138,188,0.10);
}
.client-logo-item:hover img { filter: grayscale(0%) opacity(1); }
.clients-note {
  text-align: center; font-size: 13px;
  color: var(--gray-400);
  letter-spacing: 0.5px;
}

/* ═══ 联系我们 ═══ */
#contact {
  padding: 100px 0;
  background: var(--brand-gradient);
  color: var(--white);
  position: relative;
}
.contact-layout {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: 64px; align-items: start;
}
.contact-left h2 {
  font-family: var(--font-serif); font-size: 30px;
  color: var(--white); line-height: 1.4; margin-bottom: 18px;
  font-weight: 700;
}
.contact-left p {
  font-size: 15px; color: rgba(255,255,255,0.72);
  line-height: 1.7; margin-bottom: 24px;
}
.contact-options { display: flex; flex-direction: column; gap: 12px; }
.contact-option {
  display: flex; gap: 10px; align-items: center;
  font-size: 14px; color: rgba(255,255,255,0.82);
}
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 600;
  color: rgba(255,255,255,0.82); margin-bottom: 6px;
}
.required { color: #FCD34D; }
.form-group input[type="text"] {
  width: 100%; padding: 11px 16px; border-radius: var(--radius-sm);
  border: 1px solid rgba(255,255,255,0.18);
  background: rgba(255,255,255,0.07); color: var(--white);
  font-size: 14px; font-family: var(--font);
  transition: all 0.2s;
}
.form-group input::placeholder { color: rgba(255,255,255,0.32); }
.form-group input:focus {
  outline: none; border-color: rgba(255,255,255,0.4);
  background: rgba(255,255,255,0.11);
  box-shadow: 0 0 0 3px rgba(255,255,255,0.05);
}
.checkbox-group { display: flex; gap: 14px; flex-wrap: wrap; }
.checkbox-label {
  font-size: 13px; color: rgba(255,255,255,0.7);
  display: flex; align-items: center; gap: 6px; cursor: pointer;
}
.checkbox-label input[type="checkbox"] { accent-color: var(--white); }
.btn-submit {
  background: var(--white); color: var(--primary);
  padding: 14px 32px; border: none; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 700; cursor: pointer;
  transition: all 0.25s;
  font-family: var(--font);
  margin-top: 4px;
}
.btn-submit:hover { 
  transform: translateY(-2px); 
  box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* ═══ FOOTER ═══ */
footer {
  background: var(--gray-900); padding: 64px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px; padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-brand { padding-right: 20px; }
.footer-logo-img {
  height: 40px; width: auto; margin-bottom: 14px;
  filter: brightness(0) invert(1); opacity: 0.9;
}
.footer-tagline {
  font-size: 13px; color: rgba(255,255,255,0.38);
  margin-bottom: 10px; letter-spacing: 0.3px;
}
.footer-company {
  font-size: 14px; color: rgba(255,255,255,0.65);
  font-weight: 500; margin-bottom: 14px;
}
.footer-contact-info p {
  font-size: 13px; color: rgba(255,255,255,0.4); margin-bottom: 4px;
}
.footer-nav-col h4 {
  font-size: 13px; color: rgba(255,255,255,0.5);
  font-weight: 600; margin-bottom: 16px; text-transform: uppercase;
  letter-spacing: 1px;
}
.footer-nav-col a {
  display: block; font-size: 14px; color: rgba(255,255,255,0.4);
  margin-bottom: 10px; transition: color 0.2s;
}
.footer-nav-col a:hover { color: var(--white); }
.footer-qr-col {
  display: flex; gap: 20px;
}
.qr-item { text-align: center; }
.qr-item img {
  width: 96px; height: 96px; border-radius: var(--radius-sm);
  background: var(--white); padding: 4px;
  margin-bottom: 6px;
}
.qr-item span { font-size: 11px; color: rgba(255,255,255,0.33); }
.footer-bottom {
  text-align: center; padding: 22px 0;
  font-size: 12px; color: rgba(255,255,255,0.22);
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 1024px) {
  .about-layout, .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .ai-section-inner { grid-template-columns: 1fr; gap: 36px; }
  .ai-intro { text-align: center; }
  .ai-subtitle-cn { max-width: 100%; margin: 0 auto; }
  .model-core { flex-direction: column; text-align: center; gap: 24px; }
  .core-text p { max-width: 100%; }
  .core-ring { width: 80px; height: 80px; }
  .solution-cards { grid-template-columns: 1fr; max-width: 520px; margin: 0 auto; }
  .experts-grid { grid-template-columns: repeat(3, 1fr); gap: 14px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .client-logo-wall { grid-template-columns: repeat(4, 1fr); }
  .theory-items { flex-direction: column; align-items: center; }
  .theory-divider { display: none; }
  .about-mvps { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  section { padding: 72px 0; }
  #pain, #about, #solution, #contact { padding: 64px 0; }
  #ai-assistant { padding: 48px 0; }
  #clients { padding: 52px 0 64px; }
  
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--gray-900); padding: 20px 28px;
    gap: 14px; border-top: 1px solid rgba(255,255,255,0.08);
  }
  .nav-links.open a { color: rgba(255,255,255,0.78); font-size: 15px; }
  .nav-links.open .nav-label { color: rgba(255,255,255,0.55); font-size: 15px; }
  .nav-links.open .nav-cta {
    background: var(--primary) !important;
    color: var(--white) !important; margin-top: 8px;
  }
  
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .hero-btn { padding: 12px 28px; font-size: 14px; }
  .hero-actions { gap: 12px; margin-top: 24px; }
  .pain-main-title { font-size: 26px; }
  .solution-header h2 { font-size: 26px; }
  .about-slogan-title { font-size: 22px; white-space: normal; }
  .lab-company-name { font-size: 28px; }
  .lab-header { flex-direction: column; gap: 6px; }
  .contact-left h2 { font-size: 24px; }
  
  .google-fonts-loaded .pain-main-title,
  .google-fonts-loaded .solution-header h2,
  .google-fonts-loaded .about-slogan-title,
  .google-fonts-loaded .contact-left h2,
  .google-fonts-loaded .sub-hero h1 { font-family: var(--font); font-weight: 700; }
  
  .model-dimensions { grid-template-columns: 1fr; }
  .dimension-card { padding: 20px 22px; }
  .client-logo-wall { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .form-row { grid-template-columns: 1fr; }
  .founder-block { flex-direction: column; align-items: center; text-align: center; }
  .founder-quote { border-left: none; padding-left: 0; }
  
  .model-footer-note { padding: 20px 16px; }
  
  .experts-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  #ai-experts { padding: 72px 0; }

  .about-main-row { flex-direction: column; gap: 40px; }
  .about-slogan-col { max-width: none; padding-left: 20px; }
  .about-slogan-rule { height: 36px; }
  .about-slogan-title { font-size: 22px; white-space: normal; }
  .lab-company-name { font-size: 26px; }

  .about-mvps-col { gap: 20px; }
  
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-qr-col { justify-content: center; }
}

@media (max-width: 480px) {
  #hero { min-height: 85vh; }
  .hero-title { font-size: 30px; }
  .hero-btn { padding: 10px 22px; font-size: 13px; }
  .hero-actions { flex-direction: column; align-items: center; gap: 10px; }
  .pain-main-title { font-size: 22px; }
  .client-logo-wall { grid-template-columns: repeat(2, 1fr); }
  .core-ring { width: 72px; height: 72px; }
  .core-ring-label { font-size: 11px; }
  .experts-grid { grid-template-columns: 1fr; }
  .expert-card { padding: 22px 18px 20px; }
  .carousel-dots { bottom: 60px; }
}

/* ═══ SUB-PAGE STYLES ═══ */

/* Sub-page Hero */
.sub-hero {
  padding: 140px 0 72px;
  background: var(--brand-gradient);
  position: relative;
}
.sub-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 60% 40%, rgba(255,255,255,0.06) 0%, transparent 55%);
}
.sub-hero-inner { position: relative; z-index: 1; text-align: center; max-width: 680px; margin: 0 auto; }
.sub-eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 4px;
  text-transform: uppercase; color: rgba(255,255,255,0.5);
  margin-bottom: 16px; font-weight: 500;
}
.sub-hero h1 {
  font-family: var(--font-serif); font-size: 42px;
  color: var(--white); line-height: 1.2; margin-bottom: 18px; font-weight: 700;
}
.sub-desc {
  font-size: 17px; color: rgba(255,255,255,0.68);
  line-height: 1.65;
}

/* Sub-page Content */
.sub-content { padding: 80px 0 80px; }

/* CTA for sub-pages */
.section-cta-sub { text-align: center; margin-top: 56px; padding-top: 32px; border-top: 1px solid var(--gray-200); }
.btn-submit-inline {
  display: inline-block; padding: 14px 36px; border-radius: var(--radius-sm);
  background: var(--primary); color: var(--white);
  font-size: 15px; font-weight: 700; cursor: pointer;
  transition: all 0.25s; font-family: var(--font); text-decoration: none;
  box-shadow: 0 2px 12px rgba(13,138,188,0.25);
}
.btn-submit-inline:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(13,138,188,0.35);
}

/* Workshop/Project shared styles (from original) */
.workshop-tabs {
  display: flex; gap: 8px; margin: 32px 0;
  border-bottom: 2px solid var(--gray-200); padding-bottom: 0; flex-wrap: wrap;
}
.tab-btn {
  padding: 12px 24px; border: none; background: none;
  font-size: 14px; font-weight: 600; color: var(--gray-500);
  cursor: pointer; transition: all 0.25s;
  border-bottom: 3px solid transparent; margin-bottom: -2px; font-family: var(--font);
}
.tab-btn:hover { color: var(--gray-800); }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

.ws-panel-inner {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 48px; background: var(--white);
  border: 1px solid var(--gray-200); border-radius: var(--radius-lg); padding: 40px;
}
.ws-left h3 { font-size: 22px; color: var(--gray-900); margin-bottom: 8px; font-family: var(--font-serif); }
.ws-meta { margin-bottom: 24px; }
.ws-duration {
  font-size: 13px; color: var(--primary-dark);
  background: rgba(13,138,188,0.08); padding: 4px 12px;
  border-radius: 20px; font-weight: 500;
}
.ws-block { margin-bottom: 24px; }
.ws-block h4 {
  font-size: 13px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--primary-dark); margin-bottom: 12px; font-weight: 700;
}
.ws-block ul li {
  font-size: 14px; color: var(--gray-600); line-height: 1.7;
  padding-left: 20px; position: relative; margin-bottom: 6px;
}
.ws-block ul li::before {
  content: ''; position: absolute; left: 0; top: 10px;
  width: 6px; height: 6px; border-radius: 50%; background: var(--primary);
}
.ws-right h4 {
  font-size: 13px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--primary-dark); margin-bottom: 20px; font-weight: 700;
}
.result-item { display: flex; gap: 14px; margin-bottom: 20px; }
.result-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--primary); flex-shrink: 0; margin-top: 7px;
}
.result-item p { font-size: 14px; color: var(--gray-600); line-height: 1.7; }

/* Project tabs */
.project-tabs {
  display: flex; gap: 8px; margin: 32px 0;
  border-bottom: 2px solid var(--gray-200); flex-wrap: wrap;
}
.proj-tab-btn {
  padding: 12px 24px; border: none; background: none;
  font-size: 14px; font-weight: 600; color: var(--gray-500);
  cursor: pointer; transition: all 0.25s;
  border-bottom: 3px solid transparent; margin-bottom: -2px; font-family: var(--font);
}
.proj-tab-btn:hover { color: var(--gray-800); }
.proj-tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }
.proj-panel { display: none; }
.proj-panel.active { display: block; }
.proj-intro { margin-bottom: 40px; }
.proj-intro h3 {
  font-size: 22px; color: var(--gray-900); margin-bottom: 20px;
  font-family: var(--font-serif);
}
.proj-pain-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.proj-pain-item {
  display: flex; gap: 12px; align-items: center;
  padding: 12px 16px; background: var(--white);
  border-radius: var(--radius); border: 1px solid var(--gray-200);
}
.proj-pain-num {
  font-size: 18px; font-weight: 800; color: var(--primary);
  opacity: 0.5; flex-shrink: 0;
}
.proj-pain-item p { font-size: 13px; color: var(--gray-600); }

/* Timeline */
.timeline { margin: 32px 0; }
.tl-item {
  border-left: 3px solid var(--gray-200);
  padding-left: 32px; margin-bottom: 32px; position: relative;
}
.tl-item::before {
  content: ''; position: absolute; left: -7px; top: 0;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--white); border: 3px solid var(--gray-300);
}
.tl-item.tl-highlight { border-left-color: var(--primary); }
.tl-item.tl-highlight::before { border-color: var(--primary); background: var(--primary); }
.tl-header { display: flex; gap: 16px; align-items: center; margin-bottom: 12px; flex-wrap: wrap; }
.tl-step {
  font-size: 11px; letter-spacing: 1px; text-transform: uppercase;
  background: var(--primary-deep); color: #FCD34D; padding: 4px 12px;
  border-radius: 4px; font-weight: 700;
}
.tl-title { font-size: 18px; font-weight: 700; color: var(--gray-900); }
.tl-duration { font-size: 13px; color: var(--primary-dark); font-weight: 600; }
.tl-subtitle { font-size: 14px; color: var(--gray-500); margin-bottom: 16px; font-style: italic; }
.tl-row {
  display: flex; justify-content: space-between; align-items: flex-start;
  gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--gray-100);
}
.tl-activity { flex: 1; }
.tl-activity strong { display: block; font-size: 14px; color: var(--gray-900); margin-bottom: 2px; }
.tl-activity span { font-size: 13px; color: var(--gray-500); }
.tl-deliverable { font-size: 13px; color: var(--primary-dark); white-space: nowrap; flex-shrink: 0; }
.proj-duration-badge {
  display: inline-block; margin-top: 16px;
  padding: 8px 22px; border-radius: 20px;
  background: var(--primary-deep); color: #FCD34D;
  font-size: 13px; font-weight: 600;
}
.proj-results {
  margin-top: 32px; padding: 28px;
  background: var(--white); border-radius: var(--radius);
  border: 1px solid var(--gray-200);
}
.proj-results h4 {
  font-size: 13px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--primary-dark); margin-bottom: 16px; font-weight: 700;
}
.result-row { display: flex; gap: 10px; margin-bottom: 12px; }
.result-row span { color: var(--primary); font-size: 14px; flex-shrink: 0; }
.result-row p { font-size: 14px; color: var(--gray-600); line-height: 1.6; }

/* Coaching cards for sub-page */
.coaching-grid-sub {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 32px; margin: 32px 0 48px;
}
.coaching-card-sub {
  background: var(--white); border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl); padding: 38px;
  transition: all 0.3s ease;
}
.coaching-card-sub:hover { border-color: var(--primary); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.coaching-card-sub.featured-coach { border-color: var(--primary); }
.coaching-card-sub.ai-coach { border-color: rgba(13,138,188,0.3); }
.coach-badge-top {
  display: inline-block; padding: 4px 14px; border-radius: 20px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.5px;
  text-transform: uppercase; margin-bottom: 18px;
  background: linear-gradient(135deg, rgba(13,138,188,0.1), rgba(76,184,72,0.08));
  color: var(--primary);
}
.ai-badge-sub { background: rgba(26,58,107,0.07); color: var(--secondary); }
.coach-icon-circle {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--gray-100); display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 20px;
}
.coaching-card-sub h3 { font-size: 20px; color: var(--gray-900); margin-bottom: 8px; font-weight: 700; }
.coach-desc { font-size: 14px; color: var(--gray-500); margin-bottom: 24px; }
.coach-section { margin-bottom: 24px; }
.coach-section:last-child { margin-bottom: 0; }
.coach-section h4 {
  font-size: 12px; letter-spacing: 1px; text-transform: uppercase;
  color: var(--primary-dark); margin-bottom: 12px; font-weight: 700;
}
.coach-section ul li {
  font-size: 13.5px; color: var(--gray-600); line-height: 1.7;
  padding-left: 18px; position: relative; margin-bottom: 6px;
}
.coach-section ul li::before {
  content: ''; position: absolute; left: 0; top: 9px;
  width: 5px; height: 5px; border-radius: 50%; background: var(--primary);
}
.service-table { width: 100%; border-collapse: collapse; }
.service-table td {
  padding: 10px 12px; font-size: 13px; color: var(--gray-600);
  border-bottom: 1px solid var(--gray-100);
}
.service-table td strong { color: var(--gray-900); }
.duration-col { color: var(--primary-dark) !important; font-weight: 600; white-space: nowrap; }

/* Responsive for sub-pages */
@media (max-width: 1024px) {
  .ws-panel-inner { grid-template-columns: 1fr; gap: 32px; }
  .coaching-grid-sub { grid-template-columns: 1fr; }
  .proj-pain-grid { grid-template-columns: 1fr; }
  .tl-row { flex-direction: column; }
  .tl-deliverable { white-space: normal; }
}

@media (max-width: 768px) {
  .sub-hero { padding: 120px 0 56px; }
  .sub-hero h1 { font-size: 32px; }
  .sub-desc { font-size: 15px; }
  .sub-content { padding: 56px 0 64px; }
}

/* ═══ 图片放大 Lightbox ═══ */
.lightbox-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: 9999;
  display: none;
  align-items: center; justify-content: center;
  opacity: 0; transition: opacity 0.25s ease;
}
.lightbox-overlay.active {
  display: flex; opacity: 1;
}
.lightbox-overlay img {
  max-width: 88vw; max-height: 85vh;
  border-radius: 12px;
  box-shadow: 0 24px 80px rgba(0,0,0,0.4);
  transform: scale(0.92); transition: transform 0.3s ease;
}
.lightbox-overlay.active img { transform: scale(1); }
.lightbox-close {
  position: absolute; top: 24px; right: 28px;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  color: #fff; font-size: 20px;
  cursor: pointer; display: flex;
  align-items: center; justify-content: center;
  transition: all 0.2s ease;
  line-height: 1;
}
.lightbox-close:hover {
  background: rgba(255,255,255,0.3); transform: rotate(90deg);
}