/* ========================================
   极测智能 — Apple-style Design System
   ======================================== */

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

:root {
  /* Brand Colors */
  --brand-blue: #0052D9;
  --brand-blue-light: #2979ff;
  --brand-blue-dark: #003cb3;

  /* Apple-style Neutrals */
  --bg-black: #000000;
  --bg-light: #f5f5f7;
  --bg-white: #ffffff;
  --text-primary: #1d1d1f;
  --text-secondary: rgba(0, 0, 0, 0.8);
  --text-tertiary: rgba(0, 0, 0, 0.48);
  --text-on-dark: #ffffff;
  --text-on-dark-secondary: rgba(255, 255, 255, 0.8);

  /* Interactive */
  --link-light: #0066cc;
  --link-dark: #2997ff;
  --focus-ring: #0052D9;

  /* Spacing */
  --section-padding: 120px 0;
  --container-width: 980px;
  --nav-height: 48px;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

body {
  font-family: 'Noto Sans SC', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  color: var(--text-primary);
  background: var(--bg-white);
  line-height: 1.47;
  letter-spacing: -0.374px;
  font-size: 17px;
  overflow-x: hidden;
}

a {
  color: var(--link-light);
  text-decoration: none;
  transition: color 0.3s var(--ease-out);
}

a:hover {
  color: var(--brand-blue);
}

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

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.nav-inner {
  width: 100%;
  max-width: var(--container-width);
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.2px;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo span {
  color: var(--brand-blue-light);
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  align-items: center;
  height: 100%;
}

.nav-links li {
  display: flex;
  align-items: center;
  height: 100%;
}

.nav-links a {
  color: rgba(0, 0, 0, 0.6);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.2px;
  transition: color 0.3s;
  display: flex;
  align-items: center;
  height: 100%;
  white-space: nowrap;
}

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

/* Mobile nav toggle */
.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.lang-toggle {
  font-size: 12px;
  color: rgba(0, 0, 0, 0.6);
  cursor: pointer;
  padding: 4px 10px;
  border: 1px solid rgba(0, 0, 0, 0.15);
  border-radius: 980px;
  transition: all 0.3s;
  user-select: none;
  white-space: nowrap;
}

.lang-toggle:hover {
  color: var(--text-primary);
  border-color: rgba(0, 0, 0, 0.3);
}

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

.nav-toggle span {
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  transition: all 0.3s;
}

/* --- Container --- */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 22px;
}

.container-wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 22px;
}

/* --- Sections --- */
.section-dark {
  background: var(--bg-black);
  color: var(--text-on-dark);
  padding: var(--section-padding);
}

.section-light {
  background: var(--bg-light);
  color: var(--text-primary);
  padding: var(--section-padding);
}

.section-white {
  background: var(--bg-white);
  color: var(--text-primary);
  padding: var(--section-padding);
}

/* --- Typography --- */
.headline-hero {
  font-size: clamp(40px, 7vw, 64px);
  font-weight: 600;
  line-height: 1.07;
  letter-spacing: -0.28px;
  margin-bottom: 16px;
}

.headline-section {
  font-size: clamp(28px, 5vw, 48px);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.2px;
  margin-bottom: 16px;
}

.headline-tile {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 400;
  line-height: 1.14;
  letter-spacing: 0.196px;
  margin-bottom: 12px;
}

.subtitle {
  font-size: clamp(17px, 2.5vw, 21px);
  font-weight: 400;
  line-height: 1.19;
  letter-spacing: 0.231px;
  opacity: 0.8;
}

.body-text {
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.374px;
  color: var(--text-secondary);
}

.caption {
  font-size: 14px;
  line-height: 1.29;
  letter-spacing: -0.224px;
  color: var(--text-tertiary);
}

/* --- Buttons --- */
.btn-primary {
  display: inline-block;
  background: var(--brand-blue);
  color: #fff;
  padding: 12px 28px;
  border-radius: 980px;
  font-size: 17px;
  font-weight: 400;
  border: none;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
  letter-spacing: -0.374px;
}

.btn-primary:hover {
  background: var(--brand-blue-dark);
  color: #fff;
  transform: scale(1.02);
}

.btn-outline {
  display: inline-block;
  background: transparent;
  color: var(--brand-blue);
  padding: 12px 28px;
  border-radius: 980px;
  font-size: 17px;
  font-weight: 400;
  border: 1px solid var(--brand-blue);
  cursor: pointer;
  transition: all 0.3s;
  letter-spacing: -0.374px;
}

.btn-outline:hover {
  background: var(--brand-blue);
  color: #fff;
}

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 22px 80px;
  background: var(--bg-white);
  color: var(--text-primary);
  position: relative;
  overflow: hidden;
}

/* 大屏无级缩放：内容区最大宽度限制 + 比例缩放 */
@media (min-width: 1200px) {
  .hero {
    padding-top: 140px;
    padding-bottom: 100px;
  }
  .hero .headline-hero {
    font-size: clamp(48px, 5vw, 72px);
  }
  .hero .subtitle {
    font-size: clamp(16px, 1.6vw, 22px);
    max-width: 700px;
  }
  .hero-placeholder {
    width: min(680px, 50vw);
    height: min(380px, 28vw);
  }
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 50% 80%, rgba(0, 82, 217, 0.06) 0%, transparent 60%);
  pointer-events: none;
}

.hero .headline-hero {
  position: relative;
  z-index: 1;
}

.hero .subtitle {
  position: relative;
  z-index: 1;
  margin-bottom: 40px;
  max-width: 600px;
}

.hero .btn-group {
  position: relative;
  z-index: 1;
}

.hero-placeholder {
  width: min(600px, 80vw);
  height: min(340px, 45vw);
  margin-top: 60px;
  background: linear-gradient(135deg, rgba(0, 82, 217, 0.06), rgba(0, 82, 217, 0.02));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(0, 0, 0, 0.25);
  font-size: 14px;
  position: relative;
  z-index: 1;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

/* --- Product Cards --- */
.product-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 28px;
  margin-top: 64px;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.product-card {
  background: var(--bg-white);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
  cursor: pointer;
  width: calc(50% - 14px);
  min-width: 300px;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.12);
}

.product-card-img {
  width: 100%;
  aspect-ratio: 16/11;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 14px;
  overflow: hidden;
  padding: 24px;
}

.product-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-card-body {
  padding: 36px 32px;
}

.product-card-body h3 {
  font-size: 32px;
  font-weight: 400;
  line-height: 1.14;
  margin-bottom: 12px;
  letter-spacing: 0.196px;
}

.product-card-body p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 24px;
}

.learn-more {
  font-size: 14px;
  color: var(--brand-blue);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-weight: 400;
}

.learn-more::after {
  content: '>';
  font-size: 12px;
  transition: transform 0.3s;
}

.learn-more:hover::after {
  transform: translateX(4px);
}

/* --- Feature Grid --- */
.feature-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 60px;
  justify-content: center;
}
.feature-item {
  flex: 0 1 calc((100% - 80px) / 3);
  min-width: 280px;
  max-width: 380px;
  text-align: center;
}

.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  background: rgba(0, 82, 217, 0.1);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.feature-item h4 {
  font-size: 21px;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.231px;
}

.feature-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.43;
}

/* --- Stats Strip --- */
.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
  padding: 60px 0;
}

.stat-item .stat-number {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 600;
  line-height: 1.07;
  letter-spacing: -0.28px;
  color: var(--brand-blue);
}

.stat-item .stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 8px;
}

/* --- About Section --- */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-image {
  width: 100%;
  aspect-ratio: 4/3;
  background: linear-gradient(135deg, rgba(0, 82, 217, 0.08), rgba(0, 82, 217, 0.02));
  border-radius: 12px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-tertiary);
  font-size: 14px;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  margin-top: 40px;
}

.form-group {
  margin-bottom: 24px;
}

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

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #d2d2d7;
  border-radius: 8px;
  font-size: 17px;
  font-family: inherit;
  background: var(--bg-white);
  color: var(--text-primary);
  transition: border-color 0.3s;
  letter-spacing: -0.374px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
}

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

.contact-info-card {
  padding: 40px;
  background: var(--bg-light);
  border-radius: 12px;
}

.contact-info-card h3 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 32px;
  letter-spacing: -0.2px;
}

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

.contact-info-item .icon {
  width: 40px;
  height: 40px;
  background: rgba(0, 82, 217, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 18px;
}

.contact-info-item h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-info-item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.43;
}

/* --- Footer --- */
.footer {
  background: var(--bg-black);
  color: var(--text-on-dark);
  padding: 48px 0 24px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 22px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.43;
  margin-top: 12px;
  max-width: 300px;
}

.footer-col h4 {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-col ul {
  list-style: none;
}

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

.footer-col a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.35);
}

/* --- GSAP Initial Hidden States (before JS animates in) --- */
.reveal,
.reveal-left,
.reveal-right,
.reveal-scale,
.stat-number,
.step,
.spec-table tr,
.feature-item.reveal {
  opacity: 0;
}

.reveal { transform: translateY(30px); }
.reveal-left { transform: translateX(-40px); }
.reveal-right { transform: translateX(40px); }
.reveal-scale { transform: scale(0.95); }
.stat-number { transform: translateY(20px); }
.step { transform: translateY(20px); }
.spec-table tr { transform: translateX(-20px); }
.feature-item.reveal { transform: translateY(30px); }

/* --- Product Hero (sub-pages) --- */
.product-hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 22px 80px;
  background: var(--bg-light);
  color: var(--text-primary);
}

/* Ensure anchor targets scroll below the fixed nav bar */
[id] {
  scroll-margin-top: calc(var(--nav-height) + 16px);
}

.product-hero .tag {
  display: inline-block;
  font-size: 14px;
  color: var(--brand-blue-light);
  margin-bottom: 16px;
  font-weight: 400;
  letter-spacing: -0.224px;
}

.product-detail-section {
  padding: 100px 0;
}

/* Product page width constraints for wide screens */
.product-detail-section .about-split {
  max-width: 860px;
  margin: 0 auto;
}

.product-detail-section .feature-grid {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.product-detail-section .process-steps {
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 40px;
}

.spec-table tr {
  border-bottom: 1px solid #d2d2d7;
}

.spec-table td {
  padding: 16px 0;
  font-size: 17px;
  vertical-align: top;
}

.spec-table td:first-child {
  font-weight: 600;
  width: 200px;
  color: var(--text-primary);
}

.spec-table td:last-child {
  color: var(--text-secondary);
}

/* --- Process Steps --- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 32px;
  margin-top: 60px;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  width: 48px;
  height: 48px;
  background: var(--brand-blue);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 600;
  margin: 0 auto 16px;
}

.step h4 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.43;
}

/* --- Partner Logos --- */

/* 第一排：主要客户（突出显示） */
.partner-logos-highlight {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 40px 56px;
  align-items: center;
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.partner-logo-highlight {
  height: 56px;
  width: auto;
  object-fit: contain;
  opacity: 0.75;
  filter: grayscale(100%);
  transition: all 0.3s var(--ease-out);
}

.partner-logo-highlight:hover {
  opacity: 1;
  filter: grayscale(0%);
}

.partner-text-highlight {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-primary);
  opacity: 0.6;
  letter-spacing: 2px;
  transition: opacity 0.3s;
}

.partner-text-highlight:hover {
  opacity: 0.9;
}

/* 第二排：次要客户 */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 32px 48px;
  align-items: center;
}

.partner-logo {
  height: 40px;
  width: auto;
  object-fit: contain;
  opacity: 0.6;
  filter: grayscale(100%);
  transition: all 0.3s var(--ease-out);
}

.partner-logo:hover {
  opacity: 1;
  filter: grayscale(0%);
}

.partner-text {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  opacity: 0.5;
  letter-spacing: 1px;
  transition: opacity 0.3s;
}

.partner-text:hover {
  opacity: 0.8;
}

/* --- Mission & Vision Cards --- */
.mission-vision-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  max-width: 800px;
  margin: 0 auto;
}

.mission-card {
  background: var(--bg-white);
  border-radius: 16px;
  padding: 48px 32px;
  text-align: center;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
  transition: transform 0.3s var(--ease-out);
}

.mission-card:hover {
  transform: translateY(-4px);
}

.mission-icon {
  font-size: 36px;
  margin-bottom: 16px;
}

.mission-card h3 {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-tertiary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 8px;
}

/* --- Capacity Badge --- */
.capacity-badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: rgba(0, 82, 217, 0.06);
  border: 1px solid rgba(0, 82, 217, 0.12);
  border-radius: 12px;
  padding: 16px 24px;
}

.capacity-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand-blue);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.capacity-value {
  font-size: 17px;
  font-weight: 500;
  color: var(--text-primary);
}

/* --- Stat Labels (light bg) --- */
.section-light .stat-label {
  color: var(--text-secondary);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --section-padding: 80px 0;
    --nav-height: 56px;
  }

  .nav {
    background: rgba(255,255,255,0.95) !important;
    padding: 0 16px;
    height: var(--nav-height);
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
  }

  .nav-inner {
    max-width: 100% !important;
    padding: 0 16px !important;
  }

  /* --- 侧边栏遮罩 --- */
  .nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1000;
    transition: opacity 0.3s ease;
  }
  .nav-overlay.open {
    display: block;
  }

  /* --- 侧边栏：从右侧滑入 --- */
  .nav-links {
    display: flex !important;
    flex-direction: column;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: 280px;
    max-width: 80vw;
    background: #fff;
    box-shadow: -2px 0 12px rgba(0,0,0,0.15);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    padding: 24px 32px 32px;
    gap: 0;
    margin: 0;
    list-style: none;
    height: auto;
  }

  .nav-links.open {
    transform: translateX(0);
  }

  .nav-links li {
    display: block;
    height: auto;
    width: 100%;
    border-bottom: 1px solid rgba(0,0,0,0.06);
  }

  .nav-links a {
    display: block;
    height: auto;
    padding: 16px 0;
    font-size: 17px;
    font-weight: 500;
    color: var(--text-primary);
  }

  .nav-links a.active {
    color: var(--brand-blue);
  }

  .nav-toggle {
    display: flex;
  }

  /* Hero 移动端适配 */
  .hero,
  .product-hero {
    min-height: auto !important;
    padding: 100px 20px 60px !important;
  }

  .product-hero {
    min-height: 50vh !important;
    padding: 80px 20px 40px !important;
  }

  .hero .headline-hero,
  .product-hero .headline-hero {
    font-size: 32px !important;
    line-height: 1.2 !important;
  }

  .hero .subtitle,
  .product-hero .subtitle {
    font-size: 14px !important;
    margin-bottom: 24px !important;
    max-width: 100% !important;
  }

  .hero .btn-group {
    flex-direction: column !important;
    align-items: center !important;
    gap: 12px !important;
    width: 100% !important;
  }

  .hero .btn-primary,
  .hero .btn-outline {
    width: 100% !important;
    max-width: 280px !important;
    text-align: center !important;
  }

  .hero-placeholder {
    width: 100% !important;
    max-width: 360px !important;
    height: auto !important;
    aspect-ratio: 16/10 !important;
    margin-top: 40px !important;
  }

  .hero-placeholder img {
    max-width: 100% !important;
    max-height: 100% !important;
    object-fit: contain !important;
  }

  .product-grid .product-card {
    width: 100% !important;
    min-width: 0 !important;
  }

  .product-section {
    grid-template-columns: 1fr !important;
  }

  .product-section .product-img {
    max-height: 300px !important;
  }

  .container {
    padding: 0 16px !important;
  }

  .about-split {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .stats-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

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

  .feature-grid {
    gap: 32px;
  }
  .feature-item {
    flex: 0 1 calc(50% - 16px);
    min-width: 240px;
    max-width: none;
  }

  .mission-vision-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .partner-logos-highlight {
    gap: 28px 36px;
    margin-bottom: 36px;
    padding-bottom: 36px;
  }

  .partner-logo-highlight {
    height: 44px;
  }

  .partner-text-highlight {
    font-size: 20px;
  }

  .partner-logos {
    gap: 24px 32px;
  }

  .partner-logo {
    height: 32px;
  }
}

/* --- Map --- */
.map-container {
  margin-top: 24px;
  border-radius: 12px;
  overflow: hidden;
  background: #f5f5f7;
  border: 1px solid rgba(0,0,0,0.06);
}

.map-image {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-grid {
    gap: 24px;
  }
  .feature-item {
    flex: 1 1 100%;
    min-width: 0;
    max-width: none;
  }

  .btn-group {
    flex-direction: column;
    align-items: center;
  }
}

/* ========================================
   大屏无级缩放（1440px 基准设计宽度）
   超过 1440px 时，整个页面等比缩放
   ======================================== */
@media (min-width: 1440px) {
  :root {
    --scale-ratio: calc(1440 / 100vw);
  }
  body {
    /* 无级缩放：以 1440px 为基准，超出部分等比缩小 */
    transform-origin: top center;
    transform: scale(calc(min(1440 / var(--vw, 1440), 1)));
    min-height: calc(100vh / calc(min(1440 / var(--vw, 1440), 1)));
  }
}

/* 更简洁的方案：用 clamp 做无级缩放 */
@media (min-width: 1200px) {
  :root {
    --section-padding: clamp(100px, 8vw, 160px) 0;
  }
  .container {
    max-width: clamp(980px, 72vw, 1200px);
  }
  .headline-section {
    font-size: clamp(32px, 3.2vw, 48px);
  }
  .subtitle {
    font-size: clamp(15px, 1.4vw, 20px);
  }
  .stats-strip {
    gap: clamp(32px, 4vw, 60px);
  }
  .stat-number {
    font-size: clamp(36px, 4vw, 56px);
  }
  .feature-grid {
    gap: clamp(32px, 3vw, 56px);
  }
  .feature-item h4 {
    font-size: clamp(16px, 1.4vw, 20px);
  }
  .feature-item p {
    font-size: clamp(13px, 1.1vw, 16px);
  }
}