/* ============================================================
   1. 全局变量 & 重置
   ============================================================ */
:root {
  --color-bg: #f5f7fa;
  --color-surface: #ffffff;
  --color-text: #16202a;
  --color-muted: #687582;
  --color-line: #dfe5eb;
  --color-blue: #1e88e5;
  --color-blue-dark: #0b2a59;
  --color-orange: #e60012;
  --color-dark: #111c2a;
  --container-width: 1180px;
  --shadow: 0 18px 50px rgba(21, 42, 68, 0.1);
  --ease-out-soft: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.7;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.container {
  width: min(100% - 48px, var(--container-width));
  margin: 0 auto;
}

.esg .visual {
  position: relative;
}

.esg-icons {
  position: absolute;
  z-index: 2;
  inset: 0;
  pointer-events: none;
}

.esg-icon {
  position: absolute;
  display: flex;
  width: 82px;
  height: 82px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(47, 126, 99, 0.18);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 12px 30px rgba(29, 76, 62, 0.12);
  color: #32735e;
  font-size: 11px;
  line-height: 1.3;
}

.esg-icon svg {
  width: 25px;
  height: 25px;
  margin-bottom: 4px;
  stroke-width: 1.8;
}

.esg-icon:nth-child(1) { top: 12%; left: 16%; }
.esg-icon:nth-child(2) { top: 16%; right: 12%; }
.esg-icon:nth-child(3) { right: 13%; bottom: 12%; }

.esg .visual {
  position: relative;
  width: min(100%, 470px);
  aspect-ratio: 1;
  justify-self: center;
}

.esg .earth-image {
  position: absolute;
  z-index: 1;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  object-position: center;
  animation: esg-earth-sway 6s ease-in-out infinite;
  transform-origin: center;
}

@keyframes esg-earth-sway {
  0%, 100% { transform: rotate(-1.5deg); }
  50% { transform: rotate(1.5deg); }
}

.esg .orb {
  z-index: 2;
}

/* ============================================================
   可持续发展 / ESG
   ============================================================ */
.esg {
  overflow: hidden;
  background: var(--color-bg);
}

.esg .hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.9fr);
  align-items: center;
  gap: 48px;
}

.esg .intro {
  align-self: start;
  max-width: 610px;
}

.esg h1 {
  color: #fff;
  font-size: clamp(44px, 6vw, 82px);
  letter-spacing: -2px;
  line-height: 1.15;
  text-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
}

.esg-title-e {
  color: var(--color-blue);
}

.esg-title-sg {
  color: #fff;
}

.esg h2 {
  margin-top: 16px;
  color: var(--color-muted);
  font-size: 18px;
  font-weight: 600;
}

.esg .rule {
  width: 52px;
  height: 3px;
  margin: 26px 0 20px;
  background: var(--color-blue);
}

.esg .intro p {
  max-width: 570px;
  color: var(--color-text);
  font-size: 16px;
  line-height: 1.85;
}

.esg .link {
  display: inline-flex;
  align-items: center;
  margin-top: 24px;
  color: #286d58;
  font-size: 14px;
  font-weight: 700;
}

.esg .link:hover {
  color: #174b3a;
}

.esg .visual {
  position: relative;
  width: min(100%, 470px);
  aspect-ratio: 1;
  justify-self: center;
  border-radius: 50%;
}

.esg .orbit,
.esg .globe {
  position: absolute;
  top: 50%;
  left: 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.esg .orbit {
  width: 84%;
  height: 84%;
  border: 1px solid rgba(47, 126, 99, 0.32);
  box-shadow: 0 0 0 28px rgba(47, 126, 99, 0.035), 0 0 0 58px rgba(47, 126, 99, 0.025);
}

.esg .globe {
  display: grid;
  width: 52%;
  aspect-ratio: 1;
  place-items: center;
  background:
    radial-gradient(circle at 34% 29%, rgba(219, 255, 238, 0.95), transparent 16%),
    radial-gradient(ellipse at 35% 36%, #79c59e 0 9%, transparent 10%),
    radial-gradient(ellipse at 64% 61%, #4f9d83 0 13%, transparent 14%),
    radial-gradient(circle at 36% 32%, #b4e8cf 0%, #559e86 47%, #24584f 100%);
  box-shadow: inset -18px -14px 30px rgba(13, 54, 45, 0.35), 0 24px 54px rgba(28, 91, 69, 0.2);
}

.esg .globe span {
  color: rgba(255, 255, 255, 0.94);
  font-size: 29px;
  font-weight: 700;
}

.esg .orb {
  position: absolute;
  display: grid;
  width: 76px;
  height: 76px;
  place-content: center;
  border: 1px solid rgba(47, 126, 99, 0.18);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 12px 30px rgba(29, 76, 62, 0.12);
  color: #32735e;
  font-size: 25px;
  text-align: center;
}

.esg .orb small {
  display: block;
  color: #52645f;
  font-size: 11px;
  line-height: 1.4;
}

.esg .orb.env { top: 12%; left: 16%; }
.esg .orb.soc { top: 16%; right: 12%; }
.esg .orb.gov { right: 13%; bottom: 12%; }

@media (max-width: 760px) {
  .esg .hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .esg h1 {
    font-size: clamp(38px, 9vw, 56px);
    letter-spacing: -1.5px;
  }

  .esg .visual {
    width: min(100%, 360px);
  }
}

/* ============================================================
   2. 顶部导航
   ============================================================ */
.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  width: 100%;
  border-bottom: 1px solid rgba(223, 229, 235, 0.8);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(16px);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-height: 78px;
  gap: 16px;
}

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

.brand-logo {
  display: block;
  height: 24px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  margin-left: auto;
  margin-right: 30px;
}

.nav-link {
  position: relative;
  padding: 27px 0;
  color: var(--color-muted);
  font-size: 14px;
  transition: color 0.25s ease;
  white-space: nowrap;
}

.nav-link::after {
  position: absolute;
  right: 0;
  bottom: 17px;
  left: 0;
  height: 2px;
  background: var(--color-blue);
  content: "";
  opacity: 0;
  transform: scaleX(0);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

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

.nav-link.active::after,
.nav-link:hover::after {
  opacity: 1;
  transform: scaleX(1);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  position: relative;
  z-index: 22;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px 8px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.lang-switch:hover {
  border-color: #c8d3dc;
}

.lang-btn {
  border: 0;
  padding: 3px 9px;
  border-radius: 999px;
  background: transparent;
  color: var(--color-muted);
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease, background 0.2s ease;
}

.lang-btn:hover {
  color: var(--color-blue);
}

.lang-btn.active {
  color: #fff;
  background: var(--color-blue);
}

.lang-divider {
  color: var(--color-line);
  user-select: none;
  font-size: 11px;
}

.menu-toggle {
  display: none;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px 0;
  background: var(--color-text);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* ============================================================
   3. 通用区块
   ============================================================ */
.section {
  padding: 110px 0;
}

.eyebrow {
  margin-bottom: 14px;
  color: var(--color-blue);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.5px;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h2 {
  font-size: clamp(32px, 4vw, 48px);
  letter-spacing: -0.5px;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 48px;
}

.section-heading > p {
  max-width: 390px;
  color: var(--color-muted);
  font-size: 14px;
}

/* ============================================================
   4. 首页首屏
   ============================================================ */
.hero-section {
  position: relative;
  display: flex;
  align-items: center;
  min-height: calc(100vh - 80px);
  margin-bottom: 40px;
  padding: 78px 0 0;
  background: #061a35;
  overflow: hidden;
  --mx: 0;
  --my: 0;
  --mouse-x: 50%;
  --mouse-y: 50%;
  perspective: 1200px;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(circle at 75% 40%, rgba(30, 136, 229, 0.45) 0%, transparent 55%),
    radial-gradient(circle at 15% 85%, rgba(11, 42, 89, 0.9) 0%, transparent 60%),
    linear-gradient(135deg, #0b2a59 0%, #061a35 55%, #020b1a 100%);
  transform:
    translate3d(calc(var(--mx) * -18px), calc(var(--my) * -12px), 0)
    rotateY(calc(var(--mx) * 1.2deg))
    rotateX(calc(var(--my) * -1.2deg))
    scale(1.08);
  transform-origin: 50% 50%;
  will-change: transform;
}

.hero-bg video,
.hero-bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-bg::before {
  content: "";
  position: absolute;
  top: 22%;
  right: 6%;
  width: 520px;
  height: 520px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 136, 229, 0.55) 0%, transparent 70%);
  filter: blur(60px);
  pointer-events: none;
  transform: translate3d(calc(var(--mx) * -32px), calc(var(--my) * -20px), 0);
  will-change: transform;
}

.hero-bg::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 60%;
  background-image:
    linear-gradient(rgba(122, 199, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 199, 255, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(circle at 80% 50%, #000 0%, transparent 72%);
          mask-image: radial-gradient(circle at 80% 50%, #000 0%, transparent 72%);
  pointer-events: none;
  transform: translate3d(calc(var(--mx) * -12px), calc(var(--my) * -8px), 0);
  will-change: transform;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: linear-gradient(90deg,
      rgba(6, 20, 40, 0.88) 0%,
      rgba(6, 20, 40, 0.62) 45%,
      rgba(6, 20, 40, 0.18) 100%);
  pointer-events: none;
}

.hero-overlay::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(122, 199, 255, 0.32) 1px, transparent 1px),
    linear-gradient(90deg, rgba(122, 199, 255, 0.32) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(
    circle 260px at var(--mouse-x) var(--mouse-y),
    #000 0%,
    rgba(0, 0, 0, 0.45) 45%,
    transparent 100%
  );
          mask-image: radial-gradient(
    circle 260px at var(--mouse-x) var(--mouse-y),
    #000 0%,
    rgba(0, 0, 0, 0.45) 45%,
    transparent 100%
  );
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}

.hero-overlay::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle 520px at var(--mouse-x) var(--mouse-y),
    rgba(180, 220, 255, 0.22) 0%,
    rgba(122, 199, 255, 0.14) 25%,
    rgba(30, 136, 229, 0.06) 50%,
    transparent 70%
  );
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}

.hero-section.is-mouse-active .hero-overlay::before,
.hero-section.is-mouse-active .hero-overlay::after {
  opacity: 1;
}

.hero-content {
  position: relative;
  z-index: 3;
}

.hero-content .eyebrow {
  color: #7ac7ff;
  margin-bottom: 22px;
}

.hero-content h1 {
  max-width: 760px;
  color: #fff;
  font-size: clamp(44px, 6vw, 82px);
  letter-spacing: -2px;
  line-height: 1.15;
  text-shadow: 0 6px 30px rgba(0, 0, 0, 0.35);
}

.hero-content h1 span {
  color: #7ac7ff;
}

.hero-description {
  max-width: 560px;
  margin-top: 28px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 16px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 42px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  border: 1px solid transparent;
  font-size: 14px;
  font-weight: 600;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease, border-color 0.25s ease;
}

.button:hover {
  transform: translateY(-3px);
}

.hero-section .button-primary {
  background: var(--color-blue);
  color: #fff;
}

.hero-section .button-primary:hover {
  background: #2b9bff;
}

.hero-section .button-secondary {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
  backdrop-filter: blur(8px);
}

.hero-section .button-secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: #7ac7ff;
  color: #fff;
}

/* ============================================================
   5. 为什么选择我们
   ============================================================ */
.why-section {
  background: #fff;
}

.why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
  margin-top: 20px;
}

.why-card {
  padding: 10px;
}

.why-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto 22px;
  border-radius: 50%;
  background: #e8f4ff;
  display: grid;
  place-items: center;
  font-size: 36px;
  font-weight: 800;
  color: var(--color-blue);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  overflow: hidden;
}

.why-card:hover .why-icon {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(30, 136, 229, 0.2);
}

.why-card h3 {
  margin-bottom: 12px;
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
}

.why-card p {
  color: var(--color-muted);
  font-size: 16px;
  line-height: 1.8;
  margin: 0 auto;
}

/* ============================================================
   6. 发展历程 — 折线排版
   ============================================================ */
.history-section {
  background: #fff;
  overflow: hidden;
}

.timeline-wrap {
  position: relative;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  aspect-ratio: 1200 / 400;
}

.timeline-svg-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.timeline-svg-bg path {
  stroke-dasharray: 2000;
  stroke-dashoffset: 2000;
  transition: stroke-dashoffset 2.5s var(--ease-out-soft);
}

.timeline-wrap.is-in .timeline-svg-bg path {
  stroke-dashoffset: 0;
}

.timeline-nodes {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.t-node {
  position: absolute;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.t-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--color-blue);
  box-shadow: 0 0 0 4px rgba(30, 136, 229, 0.15);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  position: relative;
  z-index: 2;
}

.t-node:hover .t-dot {
  transform: scale(1.3);
  box-shadow: 0 0 0 8px rgba(30, 136, 229, 0.25);
}

.t-node-end .t-dot {
  width: 22px;
  height: 22px;
  border-width: 4px;
  box-shadow: 0 0 0 7px rgba(30, 136, 229, 0.18);
}

.t-node-end:hover .t-dot {
  transform: scale(1.2);
  box-shadow: 0 0 0 12px rgba(30, 136, 229, 0.28);
}

.t-text {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 160px;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.t-text-top {
  bottom: 100%;
  margin-bottom: 12px;
}

.t-text-bottom {
  top: 100%;
  margin-top: 12px;
}

.t-year {
  font-size: 18px;
  font-weight: 800;
  color: var(--color-blue);
  letter-spacing: -0.5px;
}

.t-event {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  background: #fff;
  padding: 6px 12px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(21, 42, 68, 0.08);
  border: 1px solid var(--color-line);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.t-node:hover .t-event {
  border-color: var(--color-blue);
  box-shadow: 0 8px 20px rgba(21, 42, 68, 0.12);
  transform: translateY(-2px);
}

.philosophy-corner {
  position: absolute;
  right: 0;
  bottom: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 10px 0;
}

.philosophy-corner .philosophy-title {
  margin-bottom: 24px;
  color: var(--color-text);
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 4px;
  text-indent: 4px;
  line-height: 1;
}

.philosophy-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px 30px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.philosophy-list li {
  position: relative;
  padding-left: 0;
  color: var(--color-blue);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 2px;
  line-height: 1;
  transition: color 0.25s ease;
}

.philosophy-list li:hover {
  color: var(--color-blue-dark);
}

/* ============================================================
   7. 产品与应用
   ============================================================ */
.applications-section {
  background: #fff;
}

.application-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.application-card {
  display: flex;
  flex-direction: column;
  color: inherit;
  text-decoration: none;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 14px;
  overflow: hidden;
  transition:
    transform 0.35s var(--ease-out-soft),
    box-shadow 0.35s var(--ease-out-soft),
    border-color 0.3s ease;
}

.application-card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: 0 22px 45px rgba(21, 42, 68, 0.12);
}

.application-swatch {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.application-swatch img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out-soft);
}

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

.swatch-index {
  position: absolute;
  bottom: 14px;
  left: 18px;
  z-index: 2;
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

.swatch-phone    { background: #1e88e5; }
.swatch-computer { background: #0b2a59; }
.swatch-wearable { background: #e60012; }
.swatch-home     { background: #2e7d8f; }
.swatch-robot    { background: #455a64; }
.swatch-auto     { background: #43a047; }
.swatch-security { background: #5e35b1; }
.swatch-other    { background: #f57c00; }

.application-body {
  padding: 20px 22px 24px;
  flex-grow: 1;
}

.application-body h3 {
  margin-bottom: 8px;
  color: var(--color-text);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.2px;
}

.application-body p {
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.65;
}

/* ============================================================
   8. 效果图页（自动轮播图）
   ============================================================ */
.effects-section {
  background: var(--color-bg);
  padding: 60px 0 100px;
}

.effects-carousel-wrap {
  position: relative;
  width: min(100% - 48px, var(--container-width));
  margin: 0 auto;
  overflow: hidden;
  border-radius: 14px;
  box-shadow: 0 18px 50px rgba(21, 42, 68, 0.1);
  
  aspect-ratio: 4 / 3;
  max-height: 80vh;
}

.effect-logo {
  position: absolute;
  top: 24px;
  left: 24px;
  z-index: 10;
  height: 40px;
  width: auto;
  pointer-events: none;
}

.effects-track {
  display: flex;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
  scrollbar-width: none;
  -ms-overflow-style: none;
  height: 100%;
}

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

.effect-slide {
  flex: 0 0 100%;
  height: 100%;
  scroll-snap-align: start;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.effect-slide img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.effect-arrow {
  display: none;
}

.effects-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.effects-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: background 0.25s ease, transform 0.25s ease, width 0.25s ease;
}

.effects-dots .dot:hover {
  background: rgba(255, 255, 255, 0.7);
}

.effects-dots .dot.active {
  background: #fff;
  width: 24px;
  border-radius: 5px;
}

/* ============================================================
   9. 合作客户
   ============================================================ */
.clients-section {
  background: var(--color-bg);
}

.client-grid {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 12px;
}

.client-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 84px;
  margin: 0;
  padding: 10px 14px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 8px;
  overflow: hidden;
  transition:
    transform 0.3s var(--ease-out-soft),
    box-shadow 0.3s var(--ease-out-soft),
    border-color 0.3s ease;
}

.client-item:hover {
  transform: translateY(-3px);
  border-color: var(--color-blue);
  box-shadow: 0 10px 22px rgba(21, 42, 68, 0.08);
}

.client-item img {
  display: block;
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  transition: transform 0.3s var(--ease-out-soft);
}

.client-item:hover img {
  transform: scale(1.05);
}

/* ============================================================
   10. 关于我们
   ============================================================ */
.about-section {
  background: var(--color-bg);
  padding-top: 68px;
}

.about-body {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-photo {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 18px 50px rgba(21, 42, 68, 0.14);
}

.about-photo img {
  display: block;
  width: 100%;
  aspect-ratio: 5 / 4;
  object-fit: cover;
  transition: transform 0.7s var(--ease-out-soft);
}

.about-photo:hover img {
  transform: scale(1.04);
}

/* ★ 修改点：完全统一字号、粗细、颜色 */
.about-text .about-lead,
.about-text p {
  margin-bottom: 18px;
  color: var(--color-text); /* 统一颜色 */
  font-size: 16px; /* 统一字号 */
  font-weight: 400; /* 统一常规粗细，去掉加粗 */
  line-height: 1.85;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 56px;
  padding-top: 36px;
  border-top: 1px solid var(--color-line);
}

.about-stat {
  position: relative;
  padding: 22px 24px 20px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  overflow: hidden;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease,
    border-color 0.3s ease;
}

.about-stat::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-blue);
  content: "";
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.35s var(--ease-out-soft);
}

.about-stat:hover {
  transform: translateY(-4px);
  border-color: var(--color-blue);
  box-shadow: 0 14px 30px rgba(21, 42, 68, 0.1);
}

.about-stat:hover::before {
  transform: scaleY(1);
}

.about-stat strong {
  display: block;
  color: var(--color-blue);
  font-size: clamp(32px, 3.6vw, 44px);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.about-stat span {
  display: block;
  margin-top: 10px;
  color: var(--color-muted);
  font-size: 12.5px;
  letter-spacing: 0.3px;
}

/* ============================================================
   11. 资质与品质 — 专利横向滑动栏
   ============================================================ */
.quality-section {
  background: var(--color-bg);
}

.patent-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
  margin-bottom: 22px;
}

.patent-title {
  position: relative;
  padding-left: 16px;
  font-size: clamp(19px, 2vw, 26px);
  letter-spacing: -0.3px;
  color: var(--color-text);
}

.patent-title::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 4px;
  height: 1em;
  background: var(--color-blue);
  border-radius: 2px;
  content: "";
  transform: translateY(-50%);
}

.patent-hint {
  font-size: 12px;
  letter-spacing: 1px;
  color: var(--color-muted);
  opacity: 0.75;
}

.patent-scroll-wrap {
  position: relative;
}

.patent-scroll-wrap::before,
.patent-scroll-wrap::after {
  position: absolute;
  top: 0;
  bottom: 20px;
  z-index: 2;
  width: 36px;
  pointer-events: none;
  content: "";
}

.patent-scroll-wrap::before {
  left: 0;
  background: linear-gradient(to right, var(--color-bg), transparent);
}

.patent-scroll-wrap::after {
  right: 0;
  background: linear-gradient(to left, var(--color-bg), transparent);
}

.patent-scroll {
  display: flex;
  gap: 14px;
  padding: 12px 4px 20px;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--color-line) transparent;
}

.patent-scroll::-webkit-scrollbar {
  height: 6px;
}

.patent-scroll::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.03);
  border-radius: 3px;
}

.patent-scroll::-webkit-scrollbar-thumb {
  background: var(--color-line);
  border-radius: 3px;
}

.patent-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--color-blue);
}

.patent-item {
  flex: 0 0 auto;
  width: 130px;
  aspect-ratio: 3 / 4;
  margin: 0;
  scroll-snap-align: start;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(21, 42, 68, 0.05);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.patent-item:hover {
  transform: translateY(-3px);
  border-color: var(--color-blue);
  box-shadow: 0 8px 20px rgba(21, 42, 68, 0.12);
}

.patent-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

/* ============================================================
   12. 资质与品质 — 质量认证
   ============================================================ */
.cert-header {
  margin-top: 48px;
  margin-bottom: 8px;
}

.cert-title {
  position: relative;
  padding-left: 16px;
  margin-bottom: 10px;
  font-size: clamp(19px, 2vw, 26px);
  letter-spacing: -0.3px;
  color: var(--color-text);
}

.cert-title::before {
  position: absolute;
  top: 50%;
  left: 0;
  width: 4px;
  height: 1em;
  background: var(--color-blue);
  border-radius: 2px;
  content: "";
  transform: translateY(-50%);
}

.cert-desc {
  max-width: 900px;
  margin-bottom: 14px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.6;
}

.cert-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 12px;
}

.cert-item {
  flex: 0 0 130px;
  width: 130px;
  aspect-ratio: 3 / 4;
  margin: 0;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(21, 42, 68, 0.05);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.cert-item:hover {
  transform: translateY(-3px);
  border-color: var(--color-blue);
  box-shadow: 0 8px 20px rgba(21, 42, 68, 0.12);
}

.cert-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

/* ============================================================
   13. 联系区块（含选项卡样式）
   ============================================================ */
.contact-section {
  padding: 88px 0;
  background: var(--color-blue-dark);
  color: #fff;
  position: relative;
}

/* 选项卡导航 */
.contact-tabs {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 60px;
}

.contact-tab {
  padding: 12px 36px;
  font-size: 16px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.contact-tab:hover {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.15);
}

.contact-tab.active {
  color: #fff;
  background: var(--color-blue);
  border-color: var(--color-blue);
  box-shadow: 0 4px 15px rgba(30, 136, 229, 0.4);
}

/* 选项卡内容区域 */
.tab-pane {
  display: none;
  animation: fadeIn 0.5s ease;
}

.tab-pane.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 联系我们原有布局 */
.contact-layout {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 70px;
}

.contact-section .eyebrow {
  color: #7ac7ff;
}

.contact-section h2 {
  font-size: clamp(30px, 4vw, 46px);
}

.contact-section p:not(.eyebrow) {
  max-width: 540px;
  margin-top: 16px;
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
}

.contact-detail {
  margin-top: 24px;
}

.contact-detail > li {
  margin-bottom: 18px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 22px;
  min-width: 260px;
}

.contact-info .contact-info-item {
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.contact-label,
.contact-info strong {
  display: block;
}

.contact-label {
  margin-bottom: 4px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 11px;
}

.contact-info strong {
  color: #fff;
  font-size: 16px;
  transition: color 0.25s ease;
}

/* 人才招聘新布局 */
.jobs-header {
  text-align: center;
  margin-bottom: 50px;
}

.jobs-title {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.jobs-subtitle {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
}

.jobs-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 900px;
  margin: 0 auto 40px;
}

.job-card {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 28px;
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
}

.job-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.4);
}

.job-card h3 {
  font-size: 18px;
  color: #fff;
  margin-bottom: 12px;
}

.job-card p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.job-card span {
  display: inline-block;
  font-size: 12px;
  color: #7ac7ff;
  background: rgba(30, 136, 229, 0.25);
  padding: 4px 14px;
  border-radius: 999px;
  font-weight: 500;
}

.jobs-footer {
  text-align: center;
  color: rgba(255, 255, 255, 0.8);
  font-size: 15px;
}

.jobs-footer a {
  color: #7ac7ff;
  font-weight: 600;
}

.jobs-footer a:hover {
  text-decoration: underline;
}

/* 客户留言新布局 */
.message-header {
  text-align: center;
  margin-bottom: 40px;
}

.message-title {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.message-subtitle {
  color: rgba(255, 255, 255, 0.7);
  font-size: 15px;
}

.message-form {
  max-width: 600px;
  margin: 0 auto;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-blue);
  background: rgba(255, 255, 255, 0.18);
  box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.3);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.form-submit {
  width: 100%;
  margin-top: 10px;
  box-shadow: 0 6px 20px rgba(30, 136, 229, 0.3);
}

.form-submit:hover {
  box-shadow: 0 8px 25px rgba(30, 136, 229, 0.5);
}

/* ============================================================
   14. 页脚
   ============================================================ */
.site-footer {
  background: #091d3e;
  color: rgba(255, 255, 255, 0.65);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 100px;
  gap: 30px;
}

.footer-brand strong,
.footer-brand span {
  display: block;
}

.footer-brand strong {
  color: #fff;
  font-size: 16px;
}

.footer-brand span {
  margin-top: 3px;
  font-size: 11px;
}

.site-footer p {
  font-size: 11px;
}

/* ============================================================
   15. 可点击复制
   ============================================================ */
.copyable {
  cursor: pointer;
  transition: background 0.2s;
  position: relative;
}

.copyable:hover {
  background: rgba(0, 0, 0, 0.03);
}

.copyable.copied::after {
  content: '已复制';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  background: var(--color-blue);
  color: #fff;
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  white-space: nowrap;
  animation: copyFadeOut 1.5s forwards;
  pointer-events: none;
}

@keyframes copyFadeOut {
  0%   { opacity: 1; }
  70%  { opacity: 1; }
  100% { opacity: 0; }
}

/* ============================================================
   16. 入场动画
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 0.9s var(--ease-out-soft),
    transform 0.9s var(--ease-out-soft);
  will-change: opacity, transform;
}

.reveal.is-in {
  opacity: 1;
  transform: translateY(0);
}

.reveal-hero {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity 1.1s var(--ease-out-expo),
    transform 1.1s var(--ease-out-expo);
}

.reveal-hero.is-in {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.08s; }
.delay-2 { transition-delay: 0.18s; }
.delay-3 { transition-delay: 0.30s; }
.delay-4 { transition-delay: 0.42s; }

/* ============================================================
   17. 响应式
   ============================================================ */
@media (max-width: 1150px) {
  .application-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .why-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
  }
}

@media (max-width: 1000px) {
  .client-grid {
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
  }
}

@media (max-width: 900px) {
  .application-grid,
  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .why-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 800px) {
  .container {
    width: min(100% - 32px, var(--container-width));
  }

  .nav-wrapper {
    min-height: 60px;
    gap: 8px;
  }

  .brand {
    flex-shrink: 1;
    min-width: 0;
    gap: 0;
    overflow: hidden;
  }

  .brand-logo {
    display: block;
    height: 20px;
    max-width: 130px;
    width: auto;
    object-fit: contain;
  }

  .header-tools {
    flex-shrink: 0;
  }

  .menu-toggle {
    display: block;
    position: relative;
    z-index: 22;
  }

  .main-nav {
    position: absolute;
    top: 60px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 20px;
    border: 1px solid var(--color-line);
    background: #fff;
    box-shadow: var(--shadow);
  }

  .main-nav.is-open {
    display: flex;
  }

  .nav-link {
    padding: 13px 0;
    border-bottom: 1px solid #edf0f3;
  }

  .nav-link:last-child {
    border-bottom: 0;
  }

  .nav-link::after {
    right: auto;
    bottom: 0;
    width: 28px;
  }

  .hero-section {
    min-height: calc(100vh - 56px);
    margin-bottom: 28px;
    padding: 60px 0 0;
    perspective: none;
    --mx: 0;
    --my: 0;
  }

  .hero-bg,
  .hero-bg::before,
  .hero-bg::after {
    transform: none;
  }

  .hero-overlay::before,
  .hero-overlay::after {
    display: none;
  }

  .hero-content h1 {
    font-size: clamp(38px, 9vw, 56px);
    letter-spacing: -1.5px;
  }

  .hero-description {
    font-size: 15px;
    margin-top: 22px;
  }

  .hero-actions {
    margin-top: 32px;
  }

  .section {
    padding: 78px 0;
  }

  .section-heading {
    display: block;
    margin-bottom: 32px;
  }

  .section-heading > p {
    margin-top: 18px;
  }

  .application-grid,
  .advantage-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .application-body {
    padding: 18px 20px 22px;
  }

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

  .why-icon {
    width: 80px;
    height: 80px;
    font-size: 28px;
  }

  /* 移动端轮播图调整 */
  .effects-section {
    padding: 40px 0 60px;
  }

  .effects-carousel-wrap {
    width: min(100% - 32px, var(--container-width));
    aspect-ratio: 4 / 3;
    max-height: none;
  }

  .effect-logo {
    top: 16px;
    left: 16px;
    height: 28px;
  }

  .timeline-wrap {
    aspect-ratio: auto;
    padding: 20px 0;
  }

  .timeline-svg-bg {
    display: none;
  }

  .timeline-nodes {
    position: static;
    display: flex;
    flex-direction: column;
    gap: 24px;
  }

  .t-node {
    position: static;
    transform: none;
    display: flex;
    align-items: flex-start;
    gap: 16px;
    text-align: left;
  }

  .t-dot {
    flex-shrink: 0;
    margin-top: 4px;
  }

  .t-node-end .t-dot {
    width: 14px;
    height: 14px;
    border-width: 3px;
    box-shadow: 0 0 0 4px rgba(30, 136, 229, 0.15);
  }

  .t-text {
    position: static;
    transform: none;
    width: auto;
    margin: 0;
    align-items: flex-start;
  }

  .t-text-top,
  .t-text-bottom {
    bottom: auto;
    top: auto;
    margin: 0;
  }

  .t-year {
    font-size: 16px;
  }

  .philosophy-corner {
    position: static;
    margin-top: 36px;
    padding-top: 26px;
    border-top: 1px solid var(--color-line);
    align-items: center;
    text-align: center;
  }

  .philosophy-corner .philosophy-title {
    margin-bottom: 22px;
    font-size: 18px;
    letter-spacing: 4px;
    text-indent: 4px;
  }

  .client-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
  }

  .client-item {
    height: 72px;
    padding: 8px 10px;
  }

  .about-section {
    padding-top: 48px;
  }

  .about-body {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  /* 移动端关于我们字号微调 */
  .about-text .about-lead,
  .about-text p {
    font-size: 15px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 36px;
    padding-top: 26px;
    gap: 14px;
  }

  .contact-layout {
    display: block;
  }

  .contact-info {
    margin-top: 38px;
  }

  /* 移动端联系选项卡和招聘调整 */
  .contact-tabs {
    margin-bottom: 40px;
  }
  .contact-tab {
    padding: 10px 24px;
    font-size: 15px;
  }
  .jobs-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .job-card {
    padding: 20px;
  }
  .message-form {
    max-width: 100%;
  }

  .footer-content {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    min-height: 140px;
    gap: 18px;
  }

  .patent-scroll {
    gap: 10px;
    padding: 8px 2px 16px;
  }

  .patent-item {
    width: 100px;
  }

  .patent-scroll-wrap::before,
  .patent-scroll-wrap::after {
    width: 20px;
  }

  .cert-grid {
    gap: 10px;
  }

  .cert-item {
    flex: 0 0 100px;
    width: 100px;
  }
}

@media (max-width: 480px) {
  .nav-wrapper {
    min-height: 56px;
  }

  .brand-logo {
    height: 18px;
    max-width: 110px;
  }

  .main-nav {
    top: 56px;
  }

  .hero-section {
    padding: 56px 0 0;
    margin-bottom: 20px;
  }

  .hero-content h1 {
    font-size: 36px;
  }

  .hero-description {
    font-size: 14px;
  }

  .why-icon {
    width: 70px;
    height: 70px;
    font-size: 24px;
  }

  .why-card h3 {
    font-size: 18px;
  }

  .why-card p {
    font-size: 14px;
  }

  .philosophy-list {
    gap: 12px 22px;
  }

  .philosophy-list li {
    font-size: 18px;
    padding-left: 0;
  }

  .client-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .client-item {
    height: 64px;
    padding: 6px 8px;
  }

  .patent-item {
    width: 88px;
  }

  .patent-hint {
    font-size: 11px;
  }

  .cert-grid {
    gap: 8px;
  }

  .cert-item {
    flex: 0 0 88px;
    width: 88px;
  }

  .about-stat {
    padding: 16px 16px 14px;
  }

  .about-stat strong {
    font-size: 28px;
  }

  .about-stat span {
    font-size: 11.5px;
  }

  .header-tools {
    gap: 8px;
  }

  .lang-switch {
    padding: 2px 5px;
    gap: 0;
    font-size: 11px;
  }

  .lang-btn {
    padding: 2px 6px;
    font-size: 11px;
  }

  .lang-divider {
    font-size: 10px;
  }

  .menu-toggle span {
    width: 22px;
    margin: 4px 0;
  }

  .effect-logo {
    top: 12px;
    left: 12px;
    height: 22px;
  }

  .contact-tab {
    padding: 8px 18px;
    font-size: 14px;
  }
}

/* 尊重系统"减少动态效果"偏好 */
@media (prefers-reduced-motion: reduce) {
  .esg .earth-image {
    animation: none;
  }

  .reveal,
  .reveal-hero {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .hero-bg,
  .hero-bg::before,
  .hero-bg::after {
    transform: none !important;
  }

  .hero-overlay::before,
  .hero-overlay::after {
    display: none;
  }

  .timeline-svg-bg path {
    stroke-dashoffset: 0 !important;
    transition: none !important;
  }
}

/* ============================================================
   18. 锚点跳转防遮挡
   ============================================================ */
section[id] {
  scroll-margin-top: 80px;
}

/* ============================================================
   19. 子页面（多图展示）专用样式
   ============================================================ */

/* 子页面顶部标题区 */
.product-hero {
  padding: 150px 0 70px;
  background: #ffffff;
  color: var(--color-text);
  text-align: center;
  position: relative;
}

.product-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(30, 136, 229, 0.2), transparent);
}

.product-hero .eyebrow {
  color: var(--color-blue);
  margin-bottom: 20px;
  letter-spacing: 4px;
  font-weight: 800;
}

.product-hero h1 {
  font-size: clamp(34px, 5vw, 56px);
  letter-spacing: -1px;
  margin-bottom: 22px;
  font-weight: 800;
}

.product-hero h1 span {
  color: var(--color-blue);
}

.product-hero .product-desc {
  max-width: 700px;
  margin: 0 auto;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.8;
}

/* 多图展示区 */
.product-gallery {
  padding: 80px 0 120px;
  background: var(--color-bg);
}

/* 分组区块 */
.gallery-group {
  margin-bottom: 60px;
}
.gallery-group:last-child {
  margin-bottom: 0;
}

/* 分组标题 */
.group-header {
  margin-bottom: 24px;
}

.group-title {
  font-size: 20px;
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: 1px;
}

/* 图片网格：一排4个，卡片较大，排版美观 */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr); 
  gap: 24px;
}

.gallery-item {
  background: none;
  border: none;
  padding: 0;
  overflow: visible;
}

/* 卡片比例 4:3 */
.gallery-image {
  width: 100%;
  aspect-ratio: 4 / 3;
  border-radius: 10px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(15, 23, 42, 0.06);
  box-shadow: 0 4px 12px rgba(21, 42, 68, 0.03);
  overflow: hidden; 
}

.gallery-image:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 36px rgba(21, 42, 68, 0.12);
}

/* 子页面响应式 */
@media (max-width: 1000px) {
  .gallery-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 700px) {
  .product-hero {
    padding: 120px 0 40px;
  }
  .product-gallery {
    padding: 40px 0 70px;
  }
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .gallery-group {
    margin-bottom: 45px;
  }
}

@media (max-width: 480px) {
  .gallery-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
}

/* 纯色卡片背景定义（深色/高对比） */
.tech-bg-1 { background: #0b2a59; }
.tech-bg-2 { background: #0f766e; }
.tech-bg-3 { background: #4c1d95; }
.tech-bg-4 { background: #0c4a6e; }
.tech-bg-5 { background: #1e293b; }
.tech-bg-6 { background: #2e1065; }
.tech-bg-7 { background: #1e3a8a; }
.tech-bg-8 { background: #042f2e; }
.tech-bg-9 { background: #2d1b4e; }
.tech-bg-10 { background: #1e40af; }
.tech-bg-11 { background: #0ea5e9; }
.tech-bg-12 { background: #404040; }