/* ============================================
   智启人工智能科技 - 官网VI色号规范样式系统
   ZHIQI AI Technology Official Website
   ============================================ */

/* --- CSS Variables: VI Color System --- */
:root {
  /* 品牌主色 - 活力橙 */
  --color-primary: #FF7824;
  --color-primary-hover: #E66A1F;
  --color-primary-light: #FF9F5C;
  --color-primary-bg: rgba(255, 120, 36, 0.08);

  /* 辅助色 - 原木青绿 */
  --color-green: #3A9268;
  --color-green-light: #5BB889;
  --color-green-bg: rgba(58, 146, 104, 0.08);

  /* 基底中性色 */
  --color-dark: #2C2C36;
  --color-dark-secondary: #3D3D4A;
  --color-bg-warm: #F5F3EF;
  --color-bg-white: #FFFFFF;
  --color-bg-gray: #F8F7F5;
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-light: #999999;
  --color-border: #E8E6E1;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #FF7824 0%, #FFAB73 100%);
  --gradient-hero: linear-gradient(135deg, #FF9045 0%, #FFCC99 50%, #FFF5EB 100%);
  --gradient-dark: linear-gradient(135deg, #2C2C36 0%, #3D3D4A 100%);
  --gradient-green: linear-gradient(135deg, #3A9268 0%, #5BB889 100%);

  /* 字体 */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;

  /* 间距 */
  --container-max: 1200px;
  --section-padding: 80px 0;
  --section-padding-mobile: 48px 0;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 999px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(44, 44, 54, 0.06);
  --shadow-md: 0 4px 20px rgba(44, 44, 54, 0.08);
  --shadow-lg: 0 8px 40px rgba(44, 44, 54, 0.12);
  --shadow-card: 0 2px 16px rgba(44, 44, 54, 0.06);

  /* 过渡 */
  --transition: all 0.3s ease;
}

/* --- Reset & Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  color: var(--color-text-primary);
  background-color: var(--color-bg-white);
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul, ol { list-style: none; }

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-text-primary);
}

/* --- Container --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

@media (max-width: 768px) {
  .container { padding: 0 16px; }
}

/* --- Section Common --- */
.section {
  padding: var(--section-padding);
  position: relative;
}

.section--gray { background-color: var(--color-bg-warm); }
.section--dark { background-color: var(--color-dark); color: #fff; }
.section--green-bg { background-color: var(--color-green-bg); }

.section-title {
  text-align: center;
  margin-bottom: 56px;
}

.section-title h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--gradient-primary);
  margin: 14px auto 0;
  border-radius: 2px;
}

.section-title p {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 10px auto 0;
}

.section--dark .section-title h2 { color: #fff; }
.section--dark .section-title p { color: rgba(255,255,255,0.7); }

@media (max-width: 768px) {
  .section { padding: var(--section-padding-mobile); }
  .section-title { margin-bottom: 32px; }
  .section-title h2 { font-size: 28px; }
  .section-title p { font-size: 14px; }
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
}

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

.btn--primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 120, 36, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn--outline-white {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

.btn--outline-white:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
  transform: translateY(-2px);
}

.btn--green {
  background: var(--gradient-green);
  color: #fff;
  border-color: var(--color-green);
}

.btn--sm { padding: 10px 22px; font-size: 13px; }
.btn--lg { padding: 16px 40px; font-size: 17px; }

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--color-bg-warm);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.header.scrolled {
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
  border-bottom-color: transparent;
}

.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-icon {
  width: 38px;
  height: 38px;
  
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}

.logo-text {
  color: var(--color-text-primary);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}
.logo-text1 {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
}

.logo-text span {
  display: block;
  font-size: 11px;
  font-weight: 400;
  color: var(--color-text-light);
  letter-spacing: 1px;
  margin-top: 1px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  color: var(--color-text-primary);
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.nav-cta {
  margin-left: 12px;
  padding: 8px 22px;
  background: var(--gradient-primary);
  color: #fff !important;
  font-size: 13px;
  border-radius: var(--radius-full);
  font-weight: 600;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(255, 120, 36, 0.35);
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.mobile-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 1px;
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg-white);
  z-index: 999;
  padding: 24px;
  overflow-y: auto;
}

.mobile-menu.open { display: block; }

.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu a:first-child { border-top: 1px solid var(--color-border); }

@media (max-width: 1024px) {
  .nav { display: none; }
  .mobile-toggle { display: flex; }
}

/* --- Hero Section --- */
.hero {
  margin-top: 72px;
  background: var(--gradient-hero);
  min-height: 560px;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 60px 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255,120,36,0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content { max-width: 580px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(255,120,36,0.12);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-primary);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero h1 .highlight {
  color: var(--color-primary);
  position: relative;
}

.hero-desc {
  font-size: 17px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.hero-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.hero-graphic {
  width: 100%;
  max-width: 520px;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, rgba(58,146,104,0.08) 0%, rgba(255,120,36,0.08) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

/* Decorative network dots for hero */
.hero-dots {
  position: absolute;
  inset: 0;
}

.hero-dot {
  position: absolute;
  border-radius: 50%;
  animation: floatDot 6s ease-in-out infinite;
}

@keyframes floatDot {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

@media (max-width: 900px) {
  .hero { min-height: auto; padding: 40px 0; }
  .hero-inner { grid-template-columns: 1fr; text-align: center; }
  .hero-content { max-width: 100%; }
  .hero-desc { max-width: 100%; }
  .hero-actions { justify-content: center; }
  .hero-visual { display: none; }
  .hero h1 { font-size: 32px; }
  .hero-desc { font-size: 15px; }
}

/* --- Cards Grid --- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 18px;
}

.card-icon--orange { background: var(--color-primary-bg); color: var(--color-primary); }
.card-icon--green { background: var(--color-green-bg); color: var(--color-green); }

.card h3 {
  font-size: 19px;
  margin-bottom: 10px;
}

.card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .cards-grid { grid-template-columns: 1fr; }
  .card { padding: 24px 20px; }
}

/* --- Feature List (for advantages) --- */
.feature-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.feature-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.feature-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

.feature-num {
  width: 36px;
  height: 36px;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  flex-shrink: 0;
}

.feature-num--green {
  background: var(--gradient-green);
}

.feature-content h4 {
  font-size: 16px;
  margin-bottom: 6px;
}

.feature-content p {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

@media (max-width: 768px) {
  .feature-list { grid-template-columns: 1fr; }
  .feature-item { padding: 18px; }
}

/* --- Industry Tags --- */
.industry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tag {
  padding: 10px 22px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  background: var(--color-bg-white);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  transition: var(--transition);
  cursor: pointer;
}

.tag:hover,
.tag.active {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

.tag--green:hover,
.tag--green.active {
  background: var(--color-green);
  border-color: var(--color-green);
}

/* --- Stats Bar --- */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item { padding: 20px; }

.stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.section--dark .stat-number { color: var(--color-primary-light); }
.section--dark .stat-label { color: rgba(255,255,255,0.6); }

@media (max-width: 768px) {
  .stats-bar { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .stat-number { font-size: 28px; }
  .stat-label { font-size: 12px; }
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(4, 1fr);
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand .logo-text {
  margin-bottom: 14px;
  font-size: 20px;
}

.footer-brand p {
  font-size: 13px;
  line-height: 1.75;
  color: rgba(255,255,255,0.5);
  margin-bottom: 18px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: var(--transition);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: #fff;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-col ul li { margin-bottom: 10px; }

.footer-col ul li a {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--color-primary-light);
  padding-left: 4px;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 12px;
  color: rgba(255,255,255,0.35);
}

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 568px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* --- Page Banner (inner pages) --- */
.page-banner {
  margin-top: 72px;
  background: var(--gradient-hero);
  padding: 56px 0;
  text-align: center;
}

.page-banner h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 10px;
}

.page-banner p {
  font-size: 15px;
  color: var(--color-text-secondary);
}

.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-light);
}

.breadcrumb a { color: var(--color-text-secondary); }
.breadcrumb a:hover { color: var(--color-primary); }

@media (max-width: 768px) {
  .page-banner { padding: 40px 0; }
  .page-banner h1 { font-size: 26px; }
}

/* --- Article Card --- */
.article-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.article-card-img {
  aspect-ratio: 16/9;
  background: var(--color-bg-gray);
  overflow: hidden;
}

.article-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

.article-card:hover .article-card-img img { transform: scale(1.05); }

.article-card-body { padding: 20px 24px; }

.article-tag {
  display: inline-block;
  padding: 3px 10px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 10px;
}

.article-card-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
  line-height: 1.4;
}

.article-card-body h3 a:hover { color: var(--color-primary); }

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: var(--color-text-light);
}

/* --- Pricing Cards --- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  align-items: start;
}

.pricing-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  border: 2px solid var(--color-border);
  transition: var(--transition);
  position: relative;
}

.pricing-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
}

.pricing-card.featured {
  border-color: var(--color-primary);
  background: linear-gradient(to bottom, #FFFBF7, #fff);
}

.pricing-badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 18px;
  background: var(--gradient-primary);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.pricing-name {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 6px;
}

.pricing-target {
  font-size: 12px;
  color: var(--color-text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}

.pricing-features {
  list-style: none;
  margin-bottom: 24px;
}

.pricing-features li {
  padding: 7px 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  display: flex;
  gap: 8px;
  align-items: flex-start;
}

.pricing-features li::before {
  content: '\2713';
  color: var(--color-green);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

@media (max-width: 1100px) {
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 568px) {
  .pricing-grid { grid-template-columns: 1fr; }
}

/* --- Timeline (for history) --- */
.timeline {
  position: relative;
  padding-left: 30px;
  max-width: 720px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -26px;
  top: 4px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid #fff;
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.timeline-year {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.timeline-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* --- Team Members --- */
.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.team-card {
  text-align: center;
  padding: 32px 24px;
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.team-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.team-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--gradient-primary);
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 28px;
  font-weight: 700;
}

.team-name { font-size: 18px; font-weight: 700; margin-bottom: 4px; }
.team-role { font-size: 13px; color: var(--color-primary); font-weight: 600; margin-bottom: 10px; }
.team-bio { font-size: 13px; color: var(--color-text-secondary); line-height: 1.7; }

@media (max-width: 768px) {
  .team-grid { grid-template-columns: 1fr; max-width: 360px; margin-left: auto; margin-right: auto; }
}

/* --- FAQ Accordion --- */
.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover { border-color: var(--color-primary); }

.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 15px;
  font-weight: 600;
  background: var(--color-bg-white);
  user-select: none;
}

.faq-question::after {
  content: '+';
  font-size: 20px;
  color: var(--color-primary);
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-question::after { content: '\2212'; }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 24px 18px;
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
}

.faq-item.active .faq-answer { max-height: 300px; }

/* --- Case Detail --- */
.case-detail-header {
  text-align: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 36px;
}

.case-detail-header h1 { font-size: 30px; margin-bottom: 8px; }
.case-detail-header .case-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.case-section { margin-bottom: 36px; }
.case-section h2 {
  font-size: 20px;
  margin-bottom: 14px;
  padding-left: 14px;
  border-left: 3px solid var(--color-primary);
}

.case-data-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.data-point {
  background: var(--color-bg-gray);
  padding: 20px;
  border-radius: var(--radius-md);
  text-align: center;
}

.data-value {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-primary);
}

.data-label {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 4px;
}

/* --- Case Gallery --- */
.case-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.case-gallery img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: pointer;
  object-fit: cover;
  aspect-ratio: 4/3;
}

.case-gallery img:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

.case-gallery--compact {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.case-gallery--compact img {
  aspect-ratio: 3/4;
}

/* --- Testimonial Grid --- */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.testimonial-grid img {
  width: 100%;
  border-radius: var(--radius-md);
  box-shadow: 0 2px 10px rgba(0,0,0,0.06);
  transition: transform 0.3s ease;
  cursor: pointer;
}

.testimonial-grid img:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

/* --- Case: mobile gallery --- */
@media (max-width: 768px) {
  .case-gallery { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .case-gallery--compact { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
}

@media (max-width: 480px) {
  .case-gallery { grid-template-columns: 1fr; }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --- Solution Detail --- */
.solution-hero {
  padding: 40px 0;
  text-align: center;
}

.solution-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 20px 0;
}

.keyword-chip {
  padding: 6px 16px;
  background: var(--color-green-bg);
  color: var(--color-green);
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 500;
}

/* --- Contact Section --- */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.contact-card {
  padding: 28px;
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
}

.contact-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 14px;
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--color-primary);
}

.contact-card h4 { font-size: 16px; margin-bottom: 6px; }
.contact-card p { font-size: 13px; color: var(--color-text-secondary); line-height: 1.6; }

/* --- CTA Banner --- */
.cta-banner {
  background: var(--gradient-dark);
  color: #fff;
  text-align: center;
  padding: 60px 0;
  border-radius: var(--radius-xl);
  margin: 0 24px;
}

.cta-banner h2 {
  font-size: 30px;
  color: #fff;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 15px;
  opacity: 0.75;
  margin-bottom: 28px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Scroll to top button --- */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 99;
  box-shadow: 0 4px 14px rgba(255,120,36,0.3);
}

.scroll-top.visible { opacity: 1; visibility: visible; }
.scroll-top:hover { transform: translateY(-3px); }

/* --- Floating contact sidebar --- */
.floating-contact {
  position: fixed;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 99;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.floating-btn {
  width: 50px;
  height: 50px;
  background: var(--color-primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  transition: var(--transition);
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.floating-btn:hover { background: var(--color-primary-hover); width: 56px; }

@media (max-width: 768px) {
  .floating-contact { display: none; }
}

/* --- Utility --- */
.text-center { text-align: center; }
.text-orange { color: var(--color-primary) !important; }
.text-green { color: var(--color-green) !important; }
.mt-2 { margin-top: 16px; }
.mb-2 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 32px; }

/* --- Animation on scroll --- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Print styles --- */
@media print {
  .header, .footer, .floating-contact, .scroll-top, .mobile-menu { display: none !important; }
  .hero { margin-top: 0; }
  body { color: #000; }
}