/* ========================================
   光量智汇 SUNMIND 企业官网样式 v2
   品牌VI色：#FE760A / #FFC841 / #000A57
   风格：简约大气、大留白、响应式
   适配：PC / iOS / Android / HarmonyOS
   ======================================== */

:root {
  --primary: #FE760A;
  --primary-dark: #E56700;
  --primary-light: #FFF2E6;
  --gold: #FFC841;
  --gold-light: #FFF8E1;
  --navy: #000A57;
  --navy-light: #001270;
  --bg: #FFFFFF;
  --bg-soft: #FFF9F3;
  --bg-warm: #FFF5EB;
  --text: #1A1A1A;
  --text-light: #666666;
  --text-muted: #999999;
  --border: #F0E6DD;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 8px 32px rgba(0,0,0,0.06);
  --shadow-lg: 0 24px 64px rgba(0,0,0,0.1);
  --max-width: 1200px;
  --header-height: 80px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
  scrollbar-gutter: stable;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Heiti SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--navy);
  text-align: center;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  line-height: 1.3;
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  text-align: center;
  margin-bottom: 64px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 500;
}

/* 双语按钮 */
.btn {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.25s ease;
  cursor: pointer;
  border: none;
  text-align: center;
  line-height: 1.3;
}

.btn small {
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.8;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 28px rgba(254,118,10,0.28);
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 12px 36px rgba(254,118,10,0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255,255,255,0.55);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.12);
  border-color: #fff;
}

.btn-navy {
  background: var(--navy);
  color: #fff;
}

.btn-navy:hover {
  background: var(--navy-light);
}

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

.btn-white:hover {
  background: var(--primary-light);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  min-width: 100%;
  height: var(--header-height);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  min-width: 180px;
}

.logo img {
  height: 40px;
  width: 40px;
  min-height: 40px;
  min-width: 40px;
  max-height: 40px;
  max-width: 40px;
  object-fit: contain;
  flex-shrink: 0;
  display: block;
}

.logo-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  flex-shrink: 0;
}

.logo-text strong {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.logo-text span {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.2;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav a {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  padding: 8px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  position: relative;
  border-radius: 999px;
  transition: all 0.25s ease;
  line-height: 1.3;
}

.nav a small {
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  transition: color 0.25s ease;
}

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

.nav a:hover small,
.nav a.active small {
  color: var(--primary);
}

.header-cta {
  display: flex;
  align-items: center;
}

.header-cta .btn {
  padding: 10px 22px;
  font-size: 14px;
}

.header-cta .btn small {
  font-size: 9px;
}

.mobile-menu-btn {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 6px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  text-align: center;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 25%, rgba(255,200,65,0.18) 0%, transparent 40%),
    radial-gradient(circle at 85% 75%, rgba(0,10,87,0.12) 0%, transparent 40%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 900px;
  padding: 48px 24px;
}

.hero-logo {
  margin-bottom: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo-mark {
  font-size: 92px;
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: 0.08em;
  color: #fff;
  text-transform: uppercase;
}

.hero-logo-cn {
  font-size: 30px;
  font-weight: 500;
  letter-spacing: 0.5em;
  margin-top: 20px;
  opacity: 0.95;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.hero-tagline {
  font-size: 22px;
  opacity: 0.95;
  margin-bottom: 16px;
  font-weight: 400;
}

.hero-en {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
  font-size: 17px;
  font-weight: 300;
  letter-spacing: 0.06em;
  opacity: 0.85;
  margin-bottom: 48px;
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-btns .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.hero-btns .btn-primary:hover {
  background: var(--gold-light);
  color: var(--primary-dark);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0.7;
  font-size: 12px;
  letter-spacing: 0.1em;
  animation: bounce 2s infinite;
}

.hero-scroll svg {
  width: 24px;
  height: 24px;
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
  40% { transform: translateX(-50%) translateY(8px); }
  60% { transform: translateX(-50%) translateY(4px); }
}

/* Services overview - 首页顶部四大块轮播 */
.services-overview {
  background: var(--bg-soft);
  overflow: hidden;
}

.service-carousel {
  position: relative;
  width: 100%;
}

.service-carousel-viewport {
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.service-track {
  display: flex;
  gap: 24px;
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

.service-slide {
  flex: 0 0 calc(50% - 12px);
  transition: all 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  opacity: 0.45;
  transform: scale(0.92);
  filter: blur(0.5px);
  will-change: transform, opacity;
}

.service-slide.active {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
}

.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  box-shadow: var(--shadow);
  transition: all 0.35s ease;
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
  height: 100%;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--gold) 100%);
}

.service-slide.active .service-card {
  box-shadow: var(--shadow-lg);
  border-color: rgba(254,118,10,0.2);
}

.service-card .icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  background: var(--primary-light);
  color: var(--primary);
}

.service-card .icon svg {
  width: 32px;
  height: 32px;
}

.service-card small {
  display: block;
  font-size: 12px;
  color: var(--primary);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 8px;
  font-weight: 600;
}

.service-card h3 {
  font-size: 26px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
}

.service-card p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
}

.service-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1.5px solid var(--primary);
  background: #fff;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 10;
  box-shadow: 0 8px 24px rgba(254,118,10,0.18);
  transition: all 0.25s ease;
}

.service-arrow:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  box-shadow: 0 12px 32px rgba(254,118,10,0.28);
}

.service-arrow svg {
  width: 20px;
  height: 20px;
}

.service-prev {
  left: -24px;
}

.service-next {
  right: -24px;
}

.service-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 32px;
}

.service-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  cursor: pointer;
  transition: all 0.25s ease;
}

.service-dots button.active {
  background: var(--primary);
  width: 28px;
  border-radius: 5px;
}

/* Pain points section */
.pain-points-section {
  background: #fff;
}

.pain-points-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 64px;
}

.pain-point {
  text-align: center;
  padding: 40px 24px;
}

.pain-point h3 {
  font-size: 42px;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 16px;
  line-height: 1;
}

.pain-point .bar {
  width: 48px;
  height: 4px;
  background: linear-gradient(90deg, var(--primary) 0%, var(--gold) 100%);
  border-radius: 2px;
  margin: 0 auto 24px;
}

.pain-point p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
}

.pain-summary {
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.pain-summary h4 {
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
}

.pain-summary h4 span {
  color: var(--primary);
}

.pain-summary p {
  font-size: 18px;
  color: var(--text-light);
  line-height: 1.8;
}

.pain-summary p strong {
  color: var(--primary);
  font-weight: 700;
}

.pain-summary .mini-logo {
  margin-top: 32px;
}

.pain-summary .mini-logo img {
  height: 48px;
  margin: 0 auto;
}

/* About section on homepage */
.about-home-section {
  background: var(--bg-soft);
}

.about-home-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-home-content h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 24px;
  line-height: 1.3;
}

.about-home-content h2 span {
  color: var(--primary);
}

.about-home-content p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.9;
}

.about-home-highlight {
  background: #fff;
  border-left: 4px solid var(--primary);
  padding: 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-top: 28px;
  box-shadow: var(--shadow);
}

.about-home-highlight strong {
  color: var(--primary);
  font-size: 18px;
  display: block;
  margin-bottom: 8px;
}

.about-home-highlight span {
  color: var(--text);
  font-size: 15px;
}

.about-home-visual {
  background: linear-gradient(135deg, var(--primary) 0%, var(--gold) 100%);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 380px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.about-home-visual img {
  height: 120px;
  width: auto;
  margin: 0 auto 32px;
  filter: brightness(0) invert(1);
}

.about-home-visual p {
  font-size: 22px;
  font-weight: 300;
  opacity: 0.95;
  color: #fff;
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
}

/* Why us */
.why-section {
  background: var(--navy);
  color: #fff;
}

.why-section .section-title,
.why-section .section-subtitle {
  color: #fff;
}

.why-section .section-subtitle {
  opacity: 0.6;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.why-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all 0.3s ease;
}

.why-card:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-4px);
}

.why-card .num {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 16px;
  line-height: 1;
}

.why-card h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
}

.why-card p {
  font-size: 14px;
  opacity: 0.85;
  line-height: 1.7;
}

/* Why us - light variant (homepage) */
.why-section.why-light {
  background: var(--bg-soft);
  color: var(--text);
}

.why-section.why-light .section-title,
.why-section.why-light .section-subtitle {
  color: var(--navy);
}

.why-section.why-light .section-subtitle {
  opacity: 1;
}

.why-section.why-light .why-card {
  background: #fff;
  border: 1px solid var(--border);
  color: var(--text);
  box-shadow: var(--shadow);
}

.why-section.why-light .why-card:hover {
  box-shadow: var(--shadow-lg);
}

.why-section.why-light .why-card:nth-child(odd):hover {
  transform: translateX(-10px);
}

.why-section.why-light .why-card:nth-child(even):hover {
  transform: translateX(10px);
}

.why-section.why-light .why-card h4 {
  color: var(--navy);
}

.why-section.why-light .why-card p {
  color: var(--text-light);
  opacity: 1;
}

/* Cases - vertical case studies */
.cases-section {
  background: var(--bg);
}

.case-study {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}

.case-study::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
}

.case-study-headline {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.case-study-headline h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
}

.case-tag {
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 999px;
  white-space: nowrap;
}

.case-summary {
  font-size: 20px;
  color: var(--text);
  margin-bottom: 32px;
  line-height: 1.6;
}

.case-summary strong {
  color: var(--primary);
  font-weight: 800;
}

.case-study-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.case-study-block {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 28px;
}

.case-study-block h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.case-study-block ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.case-study-block ul li {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 10px;
  padding-left: 16px;
  position: relative;
}

.case-study-block ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

.case-study-block ul li strong {
  color: var(--navy);
  font-weight: 600;
}

.case-solution {
  grid-column: 1 / -1;
}

.case-phases {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.case-phase {
  background: #fff;
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
}

.case-phase .phase-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: 10px;
}

.case-phase strong {
  display: block;
  font-size: 15px;
  color: var(--navy);
  margin-bottom: 4px;
}

.case-phase small {
  font-size: 12px;
  color: var(--primary);
  font-weight: 600;
}

.case-phase p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.7;
  margin-top: 10px;
}

.case-results {
  grid-column: 1 / -1;
}

.case-result-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 40px;
  margin-bottom: 16px;
}

.case-result-stats .case-stat {
  text-align: left;
  min-width: 90px;
}

.case-result-stats .case-stat strong {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

.case-result-stats .case-stat span {
  font-size: 13px;
  color: var(--text-light);
}

.case-result-tags {
  font-size: 14px;
  color: var(--navy);
  font-weight: 500;
  line-height: 1.6;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

/* Case carousel */
.case-carousel {
  position: relative;
  overflow: hidden;
}

.case-track {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  padding: 12px 0 32px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.case-track::-webkit-scrollbar {
  display: none;
}

.case-slide {
  flex: 0 0 calc(50% - 12px);
  scroll-snap-align: start;
}

.case-slide-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: all 0.3s ease;
}

.case-slide-card:hover {
  box-shadow: var(--shadow-lg);
  border-color: rgba(254,118,10,0.2);
}

.case-slide-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.case-slide-header h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
}

.case-slide-summary {
  font-size: 17px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 28px;
}

.case-slide-summary strong {
  color: var(--primary);
  font-weight: 700;
}

.case-slide-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 24px;
}

.case-slide-col {
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 24px;
}

.case-slide-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
}

.case-slide-col p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

.case-slide-phases {
  display: flex;
  gap: 12px;
  margin-bottom: 28px;
}

.case-slide-phase {
  flex: 1;
  background: var(--bg-warm);
  border-radius: var(--radius);
  padding: 16px;
  text-align: center;
}

.case-slide-phase span {
  display: block;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 6px;
}

.case-slide-phase strong {
  display: block;
  font-size: 13px;
  color: var(--navy);
  font-weight: 600;
  line-height: 1.4;
}

.case-slide-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 32px;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px dashed var(--border);
}

.case-slide-stats .case-stat {
  text-align: left;
  min-width: 80px;
}

.case-slide-stats .case-stat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 4px;
}

.case-slide-stats .case-stat span {
  font-size: 12px;
  color: var(--text-light);
}

.case-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.case-carousel-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  cursor: pointer;
  transition: all 0.25s ease;
}

.case-carousel-dots button.active {
  background: var(--primary);
  width: 28px;
  border-radius: 5px;
}

/* CTA section */
.cta-section {
  background: var(--bg-warm);
  text-align: center;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: 32px;
}

/* Footer */
.footer {
  background: var(--navy);
  color: #fff;
  padding: 72px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand img {
  height: 48px;
  width: auto;
  margin-bottom: 20px;
  filter: brightness(0) invert(1);
  opacity: 0.95;
}

.footer-brand p {
  font-size: 14px;
  opacity: 0.75;
  line-height: 1.8;
  max-width: 320px;
}

.footer-col h5 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.footer-col h5 small {
  display: block;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-top: 4px;
}

.footer-col ul li {
  margin-bottom: 12px;
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
}

.footer-col ul li a {
  color: rgba(255,255,255,0.75);
  transition: color 0.2s;
}

.footer-col ul li a:hover {
  color: var(--gold);
}

.footer-qr {
  margin-top: 12px;
  text-align: center;
}

.footer-qr img {
  width: 72px;
  height: 72px;
  object-fit: cover;
  border-radius: 8px;
  background: #fff;
  padding: 4px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.footer-qr p {
  margin-top: 12px;
  font-size: 14px;
  color: rgba(255,255,255,0.75);
  line-height: 1.8;
  white-space: nowrap;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  opacity: 0.6;
}

/* Page header (inner pages) */
.page-header {
  padding-top: var(--header-height);
  background: linear-gradient(135deg, var(--primary) 0%, #FF8F35 100%);
  color: #fff;
  padding-bottom: 90px;
  text-align: center;
}

.page-header h1 {
  font-size: 44px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-top: 72px;
}

.page-header p {
  font-size: 18px;
  opacity: 0.92;
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.8;
}

.page-header .section-subtitle {
  color: rgba(255,255,255,0.7);
  margin-bottom: 0;
}

/* About page */
.about-intro {
  background: var(--bg);
}

.about-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-intro h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 24px;
  line-height: 1.3;
}

.about-intro p {
  font-size: 16px;
  color: var(--text-light);
  margin-bottom: 20px;
  line-height: 1.9;
}

.about-highlight {
  background: var(--bg-warm);
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-top: 28px;
}

.about-highlight strong {
  color: var(--primary);
  font-size: 18px;
  display: block;
  margin-bottom: 6px;
}

.about-highlight span {
  color: var(--text);
  font-size: 15px;
}

.about-visual {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 360px;
  box-shadow: var(--shadow);
}

.about-visual img {
  width: 100%;
  height: auto;
  max-width: 560px;
  border-radius: var(--radius);
}

/* Brand house */
.brand-house-section {
  background: var(--bg-soft);
}

.brand-house-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.brand-house-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
  border-top: 4px solid var(--primary);
}

.brand-house-card h4 {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 12px;
  font-weight: 600;
}

.brand-house-card p {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
}

/* Values */
.values-section {
  background: #fff;
}

.values-marquee {
  overflow: hidden;
  position: relative;
  mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 5%, black 95%, transparent);
}

.values-track {
  display: flex;
  gap: 20px;
  width: max-content;
  animation: marquee 35s linear infinite;
  will-change: transform;
}

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

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

.value-card {
  flex: 0 0 260px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.25s ease;
}

.value-card:hover {
  background: var(--primary-light);
  transform: translateY(-4px);
}

.value-card .letter {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 16px;
}

.value-card h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}

.value-card small {
  display: block;
  font-size: 12px;
  color: var(--primary);
  margin-bottom: 10px;
  font-weight: 600;
}

.value-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.6;
}

/* Media resources */
.media-resources-section {
  background: var(--bg);
}

.media-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.media-block {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow);
  transition: all 0.25s ease;
}

.media-block:hover {
  border-color: var(--primary);
  transform: translateY(-6px);
}

.media-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.media-icon svg {
  width: 28px;
  height: 28px;
}

.media-block h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 14px;
}

.media-block > p {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 28px;
}

.media-stat {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.media-stat strong {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}

.media-stat span {
  font-size: 14px;
  color: var(--text-light);
}

/* Services detail page */
.services-detail-section {
  background: var(--bg);
}

.service-detail-card {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 28px;
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  margin-bottom: 24px;
  transition: all 0.3s ease;
}

.service-detail-card:hover {
  border-color: rgba(254,118,10,0.25);
}

.service-detail-card .icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-detail-card .icon svg {
  width: 32px;
  height: 32px;
}

.service-detail-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.service-detail-card small {
  display: block;
  font-size: 12px;
  color: var(--primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 16px;
  font-weight: 600;
}

.service-detail-card ul {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 24px;
}

.service-detail-card ul li {
  font-size: 14px;
  color: var(--text-light);
  padding-left: 18px;
  position: relative;
  line-height: 1.6;
}

.service-detail-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}

/* Geo service highlight */
.geo-highlight {
  background: var(--bg-soft);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 56px;
  margin: 48px 0;
  text-align: center;
}

.geo-head {
  margin-bottom: 40px;
}

.geo-highlight h3 {
  font-size: 28px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.geo-subtitle {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--primary);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.geo-lead {
  font-size: 16px;
  color: var(--text-light);
  max-width: 1080px;
  margin: 0 auto;
  line-height: 1.8;
}

.geo-lead-nowrap {
  white-space: nowrap;
}

/* GEO stage flow */
.geo-stage-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.geo-stage {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 18px;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--primary);
}

.geo-stage .stage-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 10px;
  padding: 4px 10px;
  background: rgba(254,118,10,0.1);
  border-radius: 999px;
}

.geo-stage h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.geo-stage p {
  font-size: 13px;
  color: var(--text-light);
}

.geo-detail-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  text-align: left;
  margin-bottom: 32px;
}

.geo-detail {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}

.geo-detail-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 18px;
  min-height: 26px;
}

.geo-detail strong {
  font-size: 15px;
  color: var(--primary);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  text-align: center;
  width: 100%;
}

.geo-detail-tag {
  display: inline-flex;
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 4px 12px;
  border-radius: 999px;
  white-space: nowrap;
  line-height: 1;
}

.geo-detail ul {
  list-style: none;
  padding: 0;
  margin: 0;
  text-align: center;
}

.geo-detail ul li {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 10px;
  text-align: center;
}

/* GEO focus areas */
.geo-focus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  text-align: left;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 40px;
}

.geo-focus h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary-light);
}

.geo-focus ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.geo-focus li {
  position: relative;
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  padding-left: 18px;
  margin-bottom: 10px;
}

.geo-focus li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* Event process */
.event-process-section {
  background: var(--bg-soft);
}

.event-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.event-step {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px 20px;
  box-shadow: var(--shadow);
  border-top: 3px solid var(--primary);
  text-align: center;
}

.event-step .num {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
}

.event-step h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.event-step p {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.6;
}

/* Cooperation */
.coop-section {
  background: #fff;
}

.coop-intro {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
  font-size: 16px;
  color: var(--text-light);
  line-height: 1.8;
}

.coop-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
}

.coop-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  box-shadow: var(--shadow);
}

.coop-card h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 16px;
}

.coop-card-lead {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.8;
  margin-bottom: 32px;
}

.coop-card h3::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--primary);
  border-radius: 2px;
  margin-top: 14px;
}

.coop-points {
  display: flex;
  flex-direction: column;
  gap: 28px;
  flex: 1;
}

.coop-point {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 15px;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px 24px;
  transition: all 0.2s ease;
}

.coop-point:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
}

.coop-dot {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
}

.coop-form-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow);
}

.coop-form-card h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.coop-form-card > p {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* Contact page */
.contact-section {
  background: var(--bg);
}

.contact-grid {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.contact-form-card {
  width: 100%;
  max-width: 760px;
}

.contact-info-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  height: fit-content;
}

.contact-info-item {
  display: flex;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-info-item:last-child {
  margin-bottom: 0;
}

.contact-info-item .icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-item .icon svg {
  width: 24px;
  height: 24px;
}

.contact-info-item h4 {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 600;
}

.contact-info-item p {
  font-size: 16px;
  color: var(--navy);
  font-weight: 600;
}

.contact-form-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.contact-form-card h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.contact-form-card > p {
  font-size: 15px;
  color: var(--text-light);
  margin-bottom: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(254,118,10,0.12);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form-card .btn {
  width: 100%;
}

/* Responsive */
@media (max-width: 1024px) {
  .service-grid,
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .pain-points-grid {
    grid-template-columns: 1fr;
  }

  .event-steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-intro-grid,
  .about-home-grid {
    grid-template-columns: 1fr;
  }

  .contact-form-card {
    padding: 32px 24px;
  }

  .about-visual,
  .about-home-visual {
    min-height: 280px;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 72px;
  }

  .section {
    padding: 72px 0;
  }

  .section-title {
    font-size: 28px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero-logo-mark {
    font-size: 56px;
  }

  .hero-logo-cn {
    font-size: 22px;
  }

  .hero-tagline {
    font-size: 18px;
  }

  .nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-150%);
    opacity: 0;
    transition: all 0.3s ease;
    pointer-events: none;
  }

  .nav.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav a {
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    width: 100%;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
  }

  .nav a small {
    margin-left: 8px;
  }

  .nav a:last-child {
    border-bottom: none;
  }

  .header-cta {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-menu-btn.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
  }

  .mobile-menu-btn.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .service-grid,
  .why-grid,
  .brand-house-grid,
  .case-study-grid,
  .case-phases,
  .geo-features,
  .media-grid {
    grid-template-columns: 1fr;
  }

  .service-card {
    padding: 32px 24px;
  }

  .service-card h3 {
    font-size: 22px;
  }

  .pain-point h3 {
    font-size: 32px;
  }

  .pain-summary h4 {
    font-size: 22px;
  }

  .pain-summary p {
    font-size: 15px;
  }

  .about-home-content h2 {
    font-size: 28px;
  }

  .event-steps {
    grid-template-columns: 1fr;
  }

  .why-section.why-light .why-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    gap: 20px;
    padding-bottom: 24px;
    -webkit-overflow-scrolling: touch;
  }

  .why-section.why-light .why-card {
    flex: 0 0 80%;
    min-width: 260px;
    scroll-snap-align: start;
  }

  .service-detail-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service-detail-card ul {
    grid-template-columns: 1fr;
  }

  .case-study {
    padding: 28px 20px;
  }

  .case-study-headline h3 {
    font-size: 18px;
  }

  .case-summary {
    font-size: 16px;
    margin-bottom: 24px;
  }

  .case-study-block {
    padding: 20px;
  }

  .case-result-stats {
    gap: 16px 24px;
  }

  .case-result-stats .case-stat strong {
    font-size: 26px;
  }

  .case-slide {
    flex: 0 0 88%;
  }

  .service-slide {
    flex: 0 0 85%;
    opacity: 0.35;
  }

  .service-slide.active {
    opacity: 1;
  }

  .service-arrow {
    width: 40px;
    height: 40px;
  }

  .service-prev {
    left: 8px;
  }

  .service-next {
    right: 8px;
  }

  .service-card {
    padding: 32px 24px;
  }

  .case-slide-card {
    padding: 28px 22px;
  }

  .case-slide-header h3 {
    font-size: 18px;
  }

  .case-slide-summary {
    font-size: 15px;
    margin-bottom: 20px;
  }

  .case-slide-body {
    grid-template-columns: 1fr;
    gap: 12px;
    margin-bottom: 16px;
  }

  .case-slide-col {
    padding: 18px;
  }

  .case-slide-phases {
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
  }

  .case-slide-stats {
    gap: 14px 20px;
  }

  .case-slide-stats .case-stat strong {
    font-size: 22px;
  }

  .coop-grid,
  .geo-detail-grid,
  .geo-stage-flow,
  .geo-focus-grid {
    grid-template-columns: 1fr;
  }

  .coop-points {
    grid-template-columns: 1fr;
  }

  .geo-focus-grid {
    padding: 28px 20px;
  }

  .coop-card,
  .coop-form-card {
    padding: 32px 24px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .page-header h1 {
    font-size: 32px;
  }

  .geo-highlight {
    padding: 36px 24px;
  }

  .geo-lead-nowrap {
    white-space: normal;
  }
}