/* ========================================
   陕西斯巴科技术有限公司 — 欧式企业官网样式
   ======================================== */

:root {
  /* 品牌配色：深海军蓝 + Logo 橙 + 象牙白 */
  --color-primary: #1a2332;
  --color-primary-light: #2a3547;
  --color-accent: #E45F2B;
  --color-accent-light: #F08050;
  --color-bg: #f8f6f3;
  --color-bg-dark: #1a2332;
  --color-text: #3d3d3d;
  --color-text-light: #6b6b6b;
  --color-white: #ffffff;
  --color-border: #e8e4df;

  /* 字体 */
  --font-serif: 'Cormorant Garamond', 'Noto Serif SC', Georgia, serif;
  --font-sans: 'Source Sans 3', 'PingFang SC', 'Microsoft YaHei', sans-serif;

  /* 间距与过渡 */
  --section-padding: 120px;
  --container-width: 1200px;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* 重置与基础 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

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

.section {
  padding: var(--section-padding) 0;
}

/* ========================================
   导航栏
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  background: var(--color-white);
  transition: all var(--transition);
}

.header.scrolled {
  background: var(--color-white);
  padding: 14px 0;
  box-shadow: 0 1px 0 var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-switch {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
}

.lang-option {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--color-text-light);
  background: none;
  border: none;
  cursor: pointer;
  padding: 2px 4px;
  transition: color var(--transition);
}

.lang-option:hover {
  color: var(--color-primary);
}

.lang-option.active {
  color: var(--color-accent);
  font-weight: 600;
}

.lang-divider {
  color: var(--color-border);
  font-size: 0.75rem;
  user-select: none;
}

html[lang="en"] .hero-title-line:first-child {
  font-size: clamp(1.6rem, 2.2vw + 0.3rem, 2.5rem);
  letter-spacing: 0;
}

html[lang="en"] .hero-title em {
  font-size: clamp(1.4rem, 2vw + 0.2rem, 2.2rem);
}

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

.logo-img {
  height: 42px;
  width: auto;
  object-fit: contain;
}

.logo--footer {
  display: inline-flex;
  background: var(--color-white);
  padding: 8px 14px;
  border-radius: 4px;
}

.logo--footer .logo-img {
  height: 38px;
}

.nav {
  display: flex;
  gap: 36px;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--color-text);
  position: relative;
  padding: 4px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition);
}

/* ========================================
   主视觉区 Hero
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(30deg, var(--color-border) 12%, transparent 12.5%, transparent 87%, var(--color-border) 87.5%, var(--color-border)),
    linear-gradient(150deg, var(--color-border) 12%, transparent 12.5%, transparent 87%, var(--color-border) 87.5%, var(--color-border)),
    linear-gradient(30deg, var(--color-border) 12%, transparent 12.5%, transparent 87%, var(--color-border) 87.5%, var(--color-border)),
    linear-gradient(150deg, var(--color-border) 12%, transparent 12.5%, transparent 87%, var(--color-border) 87.5%, var(--color-border)),
    linear-gradient(60deg, rgba(232, 228, 223, 0.5) 25%, transparent 25.5%, transparent 75%, rgba(232, 228, 223, 0.5) 75%, rgba(232, 228, 223, 0.5)),
    linear-gradient(60deg, rgba(232, 228, 223, 0.5) 25%, transparent 25.5%, transparent 75%, rgba(232, 228, 223, 0.5) 75%, rgba(232, 228, 223, 0.5));
  background-size: 80px 140px;
  background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0, 40px 70px;
  opacity: 0.4;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(228, 95, 43, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(26, 35, 50, 0.06) 0%, transparent 50%),
    linear-gradient(to bottom, var(--color-bg) 0%, rgba(248, 246, 243, 0.9) 100%);
}

.hero-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  grid-template-rows: auto auto;
  gap: 48px 48px;
  align-items: center;
  min-height: 100vh;
  padding-top: 100px;
  padding-bottom: 100px;
}

.hero-visual {
  display: flex;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.6s;
}

/* ========================================
   拱形画框媒体
   ======================================== */
.media-arch {
  position: relative;
  padding: 10px;
  border: 2px solid var(--color-accent);
  border-radius: 50% 50% 20px 20px / 30% 30% 20px 20px;
  background: var(--color-bg);
  box-shadow: 0 20px 60px rgba(26, 35, 50, 0.12);
}

.media-arch-inner {
  border-radius: 50% 50% 14px 14px / 28% 28% 14px 14px;
  overflow: hidden;
  line-height: 0;
  position: relative;
}

.media-arch-inner img,
.media-arch-inner video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.media-arch--hero {
  max-width: 380px;
  width: 100%;
}

.media-arch--hero .media-arch-inner {
  aspect-ratio: 3/4;
}

.media-arch--hero .media-arch-inner img {
  min-height: 100%;
}

.media-arch-caption {
  display: flex;
  justify-content: space-between;
  margin-top: 14px;
  padding: 0 8px;
}

.media-arch-caption span {
  font-family: var(--font-serif);
  font-size: 0.75rem;
  font-style: italic;
  letter-spacing: 2px;
  color: var(--color-accent);
  text-transform: uppercase;
}

.media-arch--about {
  width: 100%;
}

.media-arch--about .media-arch-inner {
  aspect-ratio: 4/5;
}

.media-arch--featured .media-arch-inner {
  aspect-ratio: 3/4;
}

.media-arch--video .media-arch-inner {
  aspect-ratio: 16/10;
}

.media-arch--video video {
  aspect-ratio: 16/10;
  background: var(--color-primary);
}

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  border-radius: 50%;
  border: 2px solid var(--color-white);
  background: rgba(26, 35, 50, 0.6);
  color: var(--color-white);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  backdrop-filter: blur(4px);
}

.video-play-btn svg {
  width: 24px;
  height: 24px;
  margin-left: 4px;
}

.video-play-btn:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
  transform: translate(-50%, -50%) scale(1.08);
}

.video-play-btn.hidden {
  opacity: 0;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: left;
  padding-top: 0;
  max-width: none;
}

.hero-eyebrow {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-style: italic;
  color: var(--color-accent);
  letter-spacing: 4px;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.2s;
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 3vw, 3.2rem);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.35;
  margin-bottom: 28px;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.4s;
}

.hero-title-line {
  display: block;
  white-space: nowrap;
}

.hero-title-line:first-child {
  font-size: clamp(1.9rem, 2.6vw + 0.4rem, 3rem);
  letter-spacing: 1px;
}

.hero-title em {
  font-style: italic;
  color: var(--color-accent);
  font-size: clamp(1.7rem, 2.4vw + 0.3rem, 2.6rem);
}

.hero-desc {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: none;
  margin: 0 0 40px;
  font-weight: 300;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.6s;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: flex-start;
  margin-bottom: 60px;
  opacity: 0;
  animation: fadeUp 1s ease forwards 0.8s;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 2px;
  text-transform: uppercase;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

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

.btn-primary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 35, 50, 0.2);
}

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

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

.btn-full {
  width: 100%;
}

.hero-stats {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  box-shadow: 0 24px 64px rgba(26, 35, 50, 0.08);
  opacity: 0;
  animation: fadeUp 1s ease forwards 1s;
  position: relative;
}

.hero-stats::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(to right, var(--color-accent), var(--color-accent-light), var(--color-accent));
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 28px 32px;
  position: relative;
  transition: background var(--transition);
}

.stat-card:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 20%;
  height: 60%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--color-accent), transparent);
}

.stat-card:hover {
  background: rgba(228, 95, 43, 0.04);
}

.stat-card--accent {
  background: rgba(26, 35, 50, 0.02);
}

.stat-card--accent:hover {
  background: rgba(228, 95, 43, 0.06);
}

.stat-icon {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
  color: var(--color-accent);
}

.stat-icon svg {
  width: 22px;
  height: 22px;
}

.stat-body {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  letter-spacing: -1px;
}

.stat-number sup {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--color-accent);
  vertical-align: super;
  margin-left: 2px;
}

.stat-label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
  letter-spacing: 2px;
  margin-top: 4px;
}

.stat-note {
  font-size: 0.75rem;
  color: var(--color-text-light);
  letter-spacing: 0.5px;
  margin-top: 2px;
  font-weight: 300;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
  opacity: 0;
  animation: fadeUp 1s ease forwards 1.2s;
}

.hero-scroll span {
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--color-text-light);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s ease infinite;
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ========================================
   通用区块标题
   ======================================== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header--left {
  text-align: left;
}

.section-header--light .section-title,
.section-header--light .section-subtitle {
  color: var(--color-white);
}

.section-header--light .section-tag {
  color: var(--color-accent-light);
}

.section-tag {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--color-accent);
  letter-spacing: 3px;
  margin-bottom: 12px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.section-line {
  width: 60px;
  height: 2px;
  background: var(--color-accent);
  margin: 0 auto;
}

.section-header--left .section-line {
  margin: 0;
}

.section-subtitle {
  margin-top: 16px;
  color: var(--color-text-light);
  font-weight: 300;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

#showcase .section-subtitle {
  max-width: none;
}

.section-header--left .section-subtitle {
  margin-left: 0;
}

.section-header--light .section-line {
  background: var(--color-accent-light);
}

/* ========================================
   关于我们
   ======================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 80px;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image-frame {
  border: 1px solid var(--color-border);
  padding: 16px;
  background: var(--color-white);
}

.about-image-placeholder {
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-image-placeholder svg {
  width: 80px;
  height: 80px;
  color: var(--color-accent);
  opacity: 0.6;
}

.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--color-accent);
  color: var(--color-primary);
  padding: 20px 28px;
  text-align: center;
}

.badge-year {
  display: block;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1;
}

.badge-text {
  font-size: 0.75rem;
  letter-spacing: 2px;
}

.about-content h3 {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
  margin-bottom: 24px;
}

.about-content p {
  color: var(--color-text-light);
  margin-bottom: 16px;
  font-weight: 300;
}

.about-features {
  list-style: none;
  margin-top: 32px;
}

.about-features li {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

.about-features li:last-child {
  border-bottom: none;
}

.feature-icon {
  color: var(--color-accent);
  font-size: 0.6rem;
  margin-top: 6px;
}

.about-features strong {
  display: block;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 4px;
}

.about-features span {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* ========================================
   全球布局
   ======================================== */
.global {
  background: var(--color-white);
  position: relative;
  overflow: hidden;
}

.global::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  opacity: 0.5;
  pointer-events: none;
}

.global::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 900px;
  height: 900px;
  border: 1px dashed rgba(228, 95, 43, 0.2);
  border-radius: 50%;
  pointer-events: none;
}

.global-highlight {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 48px 32px;
  margin-bottom: 56px;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border: 1px solid rgba(228, 95, 43, 0.2);
}

.global-highlight-inner {
  max-width: 720px;
  margin: 0 auto;
}

.global-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin: 0 auto 20px;
  opacity: 0.8;
}

.global-slogan {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 16px;
  letter-spacing: 1px;
}

.global-slogan strong {
  color: var(--color-accent-light);
  font-weight: 700;
}

.global-intro {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.7);
  font-weight: 300;
  line-height: 1.8;
}

.global-regions {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.region-card {
  padding: 36px 28px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  transition: all var(--transition);
  position: relative;
}

.region-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(26, 35, 50, 0.08);
}

.region-card--featured {
  background: var(--color-white);
  border-color: var(--color-accent);
}

.region-card--featured::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
}

.region-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.region-tag {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-style: italic;
  letter-spacing: 2px;
  color: var(--color-accent);
  text-transform: uppercase;
}

.region-dot {
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

.region-card h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.region-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  font-weight: 300;
  line-height: 1.7;
  margin-bottom: 20px;
}

.region-services {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.region-services li {
  font-size: 0.75rem;
  letter-spacing: 0.5px;
  padding: 4px 12px;
  border: 1px solid var(--color-border);
  color: var(--color-text-light);
  background: var(--color-white);
}

.region-card--featured .region-services li {
  background: var(--color-bg);
}

.global-connect {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
}

.connect-line {
  flex: 1;
  max-width: 200px;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-accent), transparent);
}

.connect-label {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  font-style: italic;
  color: var(--color-accent);
  letter-spacing: 3px;
  white-space: nowrap;
}

/* ========================================
   合作案例
   ======================================== */
.cases {
  background: var(--color-white);
}

.cases-carousel {
  position: relative;
}

.cases-carousel-track {
  display: grid;
  align-items: stretch;
}

.case-feature {
  grid-area: 1 / 1;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 48px;
  align-items: stretch;
  width: 100%;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.case-feature.is-active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  z-index: 1;
}

.case-feature-media {
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: #f3f7fb;
  aspect-ratio: 16 / 10;
  min-height: 320px;
  max-height: 420px;
  align-self: stretch;
}

.case-feature-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center center;
  transition: transform var(--transition);
}

.case-feature.is-active:hover .case-feature-media img {
  transform: scale(1.02);
}

.case-feature-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.case-feature-tag {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  font-style: italic;
  letter-spacing: 2px;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.case-feature-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.5vw, 2rem);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1.35;
  min-height: 2.7em;
}

.case-feature-body > p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  font-weight: 300;
  line-height: 1.8;
  margin-bottom: 28px;
  min-height: 5.4em;
}

.case-meta {
  display: grid;
  gap: 16px;
  margin: 0;
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.case-meta > div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  align-items: baseline;
}

.case-meta dt {
  font-size: 0.75rem;
  letter-spacing: 1px;
  color: var(--color-text-light);
  text-transform: uppercase;
}

.case-meta dd {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
}

.cases-carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 36px;
}

.cases-carousel-btn {
  width: 42px;
  height: 42px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  color: var(--color-primary);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.cases-carousel-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.cases-carousel-dots {
  display: flex;
  align-items: center;
  gap: 10px;
}

.cases-carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  padding: 0;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.cases-carousel-dot.is-active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: scale(1.15);
}

/* ========================================
   实景展示
   ======================================== */
.showcase {
  background: linear-gradient(180deg, #f7f8fb 0%, #ffffff 100%);
}

.showcase-category-layout {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 24px;
  align-items: stretch;
}

.product-nav-card,
.product-spotlight,
.product-card {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(26, 35, 50, 0.08);
  box-shadow: 0 18px 50px rgba(26, 35, 50, 0.06);
  backdrop-filter: blur(10px);
}

.product-nav-card {
  position: sticky;
  top: 110px;
  padding: 24px;
}

.product-nav-header h3 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.product-nav-header p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  line-height: 1.8;
}

.product-nav-list {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.product-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid rgba(26, 35, 50, 0.08);
  transition: all var(--transition);
  background: rgba(247, 248, 251, 0.72);
}

.product-nav-item span {
  color: var(--color-accent);
  font-family: var(--font-serif);
}

.product-nav-item em {
  font-style: normal;
  font-weight: 600;
  color: var(--color-primary);
}

.product-nav-item:hover,
.product-nav-item.active {
  transform: translateX(6px);
  border-color: rgba(228, 95, 43, 0.28);
  background: #fff;
}

.product-content-stack {
  display: grid;
  gap: 22px;
  min-height: 100%;
  grid-template-rows: 1fr;
}

.product-spotlight[hidden],
.product-detail-panel[hidden] {
  display: none !important;
}

.product-spotlight {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 0;
  overflow: hidden;
  margin-left: 0;
  align-items: stretch;
  height: 100%;
  min-height: 100%;
}

.product-spotlight-image {
  background: linear-gradient(180deg, #dff1ff 0%, #eef5fb 45%, #edf2f7 100%);
  min-height: 380px;
  height: 100%;
  padding: 16px;
  display: flex;
  align-items: stretch;
}

.product-spotlight-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 100%;
  border-radius: 12px;
  box-shadow: 0 20px 50px rgba(26, 35, 50, 0.15);
  display: block;
}

.product-spotlight-body {
  padding: 22px 24px;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 10px;
  height: 100%;
  background: linear-gradient(180deg, #fff 0%, #fbfcfe 100%);
}

.product-spotlight-body h3 {
  margin: 4px 0 12px;
}

.product-spotlight-body p {
  margin-bottom: 18px;
}

.product-badge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.product-code {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 2px;
  color: var(--color-text-light);
}

.product-spotlight-body h3 {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 2.8vw, 2.35rem);
  color: var(--color-primary);
  margin: 10px 0 16px;
  line-height: 1.35;
}

.product-spotlight-body p {
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

.product-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: auto;
  align-self: stretch;
}

.product-specs div {
  padding: 14px 14px 12px;
  background: #f7f9fc;
  border: 1px solid rgba(26, 35, 50, 0.08);
}

.product-specs span {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 1.8px;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.product-specs strong {
  font-size: 0.92rem;
  color: var(--color-primary);
  line-height: 1.5;
}


.product-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.product-card {
  padding: 22px 24px;
  border-radius: 12px;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition);
}

.product-card:hover,
.product-card.active {
  border-color: rgba(228, 95, 43, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 16px 36px rgba(26, 35, 50, 0.12);
}

.product-card h4 {
  font-family: var(--font-serif);
  font-size: 1.08rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.product-card p {
  color: var(--color-text-light);
  font-size: 0.92rem;
  line-height: 1.7;
}

.product-card--wide {
  grid-column: span 2;
}

.product-detail-panel {
  height: 100%;
  min-height: 100%;
  padding: 20px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(26, 35, 50, 0.08);
  box-shadow: 0 18px 50px rgba(26, 35, 50, 0.06);
  backdrop-filter: blur(10px);
}

.product-detail-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  align-items: start;
}

.product-detail-card {
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid rgba(26, 35, 50, 0.08);
  transition: all var(--transition);
  overflow: hidden;
}

.product-detail-card:hover {
  border-color: rgba(228, 95, 43, 0.28);
  box-shadow: 0 12px 28px rgba(26, 35, 50, 0.1);
  transform: translateY(-2px);
}

.product-detail-card-image {
  aspect-ratio: 1 / 1;
  background: #f3f7fb;
  overflow: hidden;
}

.product-detail-card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center 88%;
  display: block;
  padding: 14px;
  box-sizing: border-box;
}

.product-detail-card-image--photo img {
  object-fit: cover;
  object-position: center center;
  padding: 0;
}

.product-detail-card-image--fit img {
  object-fit: contain;
  object-position: center center;
  padding: 16px;
}

.product-detail-card-body {
  padding: 10px 12px 12px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.product-detail-card-code {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.product-detail-card-name {
  font-size: 0.78rem;
  color: var(--color-text-light);
  text-align: center;
  line-height: 1.5;
}

.product-detail-card.is-video-trigger {
  cursor: pointer;
}

.showcase-featured,
.showcase-grid,
.showcase-video-block {
  display: none;
}

.video-modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: grid;
  place-items: center;
  align-items: start;
  overflow-y: auto;
  padding: 24px;
}

.video-modal[hidden] {
  display: none;
}

.video-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.62);
  backdrop-filter: blur(8px);
}

.video-modal__dialog {
  position: relative;
  z-index: 1;
  width: min(680px, 100%);
  max-height: calc(100vh - 96px);
  overflow: auto;
  background: #fff;
  border: 1px solid rgba(26, 35, 50, 0.12);
  box-shadow: 0 24px 80px rgba(15, 23, 42, 0.28);
  border-radius: 18px;
  padding: 16px;
}

.video-modal__title {
  margin: 0 40px 12px 0;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.video-modal__media {
  border-radius: 14px;
  overflow: hidden;
  background: #0f172a;
}

.video-modal__media video {
  display: block;
  width: 100%;
  max-height: min(58vh, 520px);
  background: #0f172a;
}

.video-modal__hint {
  margin: 14px 0 0;
  color: var(--color-text-light);
  font-size: 0.92rem;
}

.video-modal__close {
  position: absolute;
  top: 14px;
  right: 16px;
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 50%;
  background: rgba(15, 23, 42, 0.08);
  color: var(--color-primary);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
}

.video-modal__close:hover,
.video-modal__close:focus-visible {
  background: rgba(228, 95, 43, 0.12);
  color: var(--color-accent);
}

body.modal-open {
  overflow: hidden;
}

@media (max-width: 640px) {
  .video-modal {
    padding: 12px;
  }

  .video-modal__dialog {
    max-height: calc(100vh - 24px);
    padding: 16px;
    border-radius: 14px;
  }

  .video-modal__title {
    font-size: 1.1rem;
  }
}

/* ========================================
   业务领域
   ======================================== */
.services {
  background: var(--color-primary);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-accent), transparent);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  background: rgba(228, 95, 43, 0.15);
}

.service-card {
  background: var(--color-primary);
  padding: 40px 32px;
  position: relative;
  transition: all var(--transition);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.service-card:hover {
  background: var(--color-primary-light);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-number {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: rgba(228, 95, 43, 0.12);
  line-height: 1;
  margin-bottom: 16px;
}

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
}

.service-icon svg {
  width: 100%;
  height: 100%;
  color: var(--color-accent);
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.65);
  font-weight: 300;
  line-height: 1.7;
}

/* ========================================
   核心优势
   ======================================== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.advantage-item {
  text-align: center;
  padding: 40px 24px;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  transition: all var(--transition);
}

.advantage-item:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(26, 35, 50, 0.08);
}

.advantage-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-accent);
  border-radius: 50%;
}

.advantage-icon svg {
  width: 24px;
  height: 24px;
  color: var(--color-accent);
}

.advantage-item h4 {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.advantage-item p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  font-weight: 300;
}

/* ========================================
   联系我们
   ======================================== */
.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.contact-list {
  list-style: none;
  margin-top: 40px;
}

.contact-list li {
  display: flex;
  flex-direction: column;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.contact-label {
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.contact-value {
  font-size: 1rem;
  color: var(--color-primary);
}

.contact-form {
  background: var(--color-white);
  padding: 48px;
  border: 1px solid var(--color-border);
}

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

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

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 1px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  outline: none;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
}

.form-group textarea {
  resize: vertical;
  min-height: 100px;
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding: 64px 0 32px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 60px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
  margin-top: 16px;
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--color-accent-light);
  letter-spacing: 2px;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 48px;
}

.footer-col h5 {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.footer-col a {
  display: block;
  font-size: 0.88rem;
  padding: 6px 0;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition);
}

.footer-col--products {
  display: block;
}

.footer-col a:hover {
  color: var(--color-accent-light);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  font-size: 0.82rem;
}

.footer-legal {
  color: rgba(255, 255, 255, 0.35);
}

/* ========================================
   滚动动画
   ======================================== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 1024px) {
  :root {
    --section-padding: 80px;
  }

  .showcase-category-layout,
  .product-spotlight {
    grid-template-columns: 1fr;
  }

  .product-spotlight-image {
    min-height: 320px;
  }

  .product-nav-card {
    position: static;
  }

  .product-detail-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .about-grid,
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .case-feature {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .case-feature-media {
    min-height: 240px;
    max-height: 320px;
  }

  .case-feature-body h3,
  .case-feature-body > p {
    min-height: 0;
  }

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

  .hero-layout {
    grid-template-columns: 1fr;
    gap: 48px;
    text-align: center;
    padding-top: 120px;
  }

  .hero-content {
    text-align: center;
  }

  .hero-title {
    font-size: clamp(1.6rem, 4.5vw, 2.4rem);
  }

  .hero-title-line:first-child {
    font-size: clamp(1.55rem, 4.2vw, 2.2rem);
  }

  .hero-title em {
    font-size: clamp(1.4rem, 3.8vw, 2rem);
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .stat-card:not(:last-child)::after {
    top: auto;
    bottom: 0;
    right: 10%;
    left: 10%;
    width: auto;
    height: 1px;
    background: linear-gradient(to right, transparent, var(--color-border), transparent);
  }

  .hero-visual {
    order: -1;
  }

  .product-card-grid {
    grid-template-columns: 1fr;
  }

  .product-card--wide {
    grid-column: auto;
  }

  .footer-top {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 64px;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-bg);
    flex-direction: column;
    padding: 80px 40px;
    gap: 24px;
    transition: right var(--transition);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.1);
  }

  .nav.open {
    right: 0;
  }

  .nav-toggle {
    display: flex;
    z-index: 1001;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }

  .hero-stats {
    flex-direction: column;
    gap: 0;
  }

  .stat-card {
    padding: 24px 20px;
    justify-content: center;
    text-align: center;
    flex-direction: column;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .advantages-grid {
    grid-template-columns: 1fr;
  }

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

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

  .global-highlight {
    padding: 36px 20px;
  }

  .connect-label {
    font-size: 0.8rem;
    letter-spacing: 1px;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 480px) {
  .hero-title-line:first-child {
    font-size: clamp(1.35rem, 5.5vw, 1.75rem);
    letter-spacing: 0;
  }

  .hero-title em {
    font-size: clamp(1.2rem, 4.8vw, 1.55rem);
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }
}