*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  color: #092a71;
  background: #fff;
}

img {
  max-width: 100%;
  border: 0;
  vertical-align: middle;
}

.server-page {
  --server-title: #023692;
  --server-navy: #092a71;
  --server-muted: #666;
  --server-hero: #1e2c41;
  --server-shadow: 0 10px 28px rgba(9, 42, 113, 0.89);
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  overflow: hidden;
  background: #fff;
}

/* ---- Hero ---- */
.subbanner-hero {
  position: relative;
  height: 550px;
  background-color: #2a2a2a;
  background-image: url("/static/web/img/banner.jpg");
  background-repeat: no-repeat;
  background-position: center center;
  background-size: cover;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.subbanner-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.7);
  pointer-events: none;
}

.subbanner-hero-con {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
  padding: 0 24px;
}

.subbanner-hero-title {
  margin: 0;
  font-size: 60px;
  font-weight: 600;
  letter-spacing: 4px;
  line-height: 1.4;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.subbanner-hero-sub {
  margin: 16px 0 0;
  font-size: 36px;
  font-weight: 400;
  letter-spacing: 3px;
  opacity: 0.95;
  color: #fff;
}

/* ---- 顶部标题 ---- */
.server-head {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 319px;
  padding: 40px 24px 32px;
  overflow: hidden;
  background: #fff;
}

.server-watermark {
  position: absolute;
  left: 50%;
  top: 46%;
  transform: translate(-50%, -50%);
  font-size: 168px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #f2f2f2;
  line-height: 1;
  user-select: none;
  pointer-events: none;
  white-space: nowrap;
}

.server-head h1 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--server-title);
}

.server-en {
  position: relative;
  z-index: 1;
  margin: 10px 0 0;
  font-size: 30px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--server-muted);
  text-transform: uppercase;
}

/* ---- 主视觉 ---- */
.server-hero {
  position: relative;
  height: 413px;
  background-color: var(--server-hero);
  background-repeat: no-repeat;
  background-position: center top;
  background-size: 100% auto;
  overflow: hidden;
}

.server-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(20, 32, 50, 0.35) 0%,
    rgba(20, 32, 50, 0.12) 42%,
    transparent 62%
  );
  pointer-events: none;
}

.server-hero-copy {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  padding: 96px 40px 0 135px;
  color: #fff;
}

.server-hero-copy h2 {
  margin: 0;
  font-size: 56px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.04em;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.18);
}

.server-hero-copy .hero-gap {
  display: inline-block;
  width: 0.55em;
}

.server-hero-copy p {
  margin: 36px 0 0;
  font-size: 22px;
  font-weight: 400;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: #fff;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.2);
}

/* ---- 三张服务卡片 ---- */
.server-cards {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 50px;
  margin-top: -92px;
  padding: 0 105px 72px;
}

.server-card {
  min-height: 464px;
  background: #fff;
  box-shadow: 0 16px 36px rgba(9, 42, 113, 0.16);
  text-align: left;
  animation: server-card-in 0.6s ease both;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.server-card-content {
  padding: 48px 96px 87px;
}

.server-card:nth-child(1) {
  animation-delay: 0.06s;
}

.server-card:nth-child(2) {
  animation-delay: 0.18s;
}

.server-card:nth-child(3) {
  animation-delay: 0.3s;
}

.server-card:hover {
  box-shadow: 0 16px 36px rgba(9, 42, 113, 0.36);
}

@keyframes server-card-in {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.server-card-icon {
  position: relative;
  width: 128px;
  height: 128px;
  margin: 0 auto 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--server-navy);
}

.server-card-icon svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
}

.server-card-icon span {
  position: relative;
  z-index: 1;
  font-size: 52px;
  font-weight: 700;
  line-height: 1;
}

.server-card h3 {
  margin: 0 0 18px;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.45;
  padding-left: 10px;
  color: var(--server-navy);
}

.server-card h3::after {
  content: "";
  display: block;
  width: 100%;
  max-width: 280px;
  height: 0;
  margin: 16px auto 0;
  border-bottom: 1px dotted #c5c9d2;
}

.server-card p {
  margin: 0;
  font-size: 16px;
  font-weight: 400;
  line-height: 1.4;
  padding-left: 10px;
  color: var(--server-navy);
}

.server-card-line {
  width: 100%;
  height: 4px;
  background: #0048c6;
}

.scl{
  background: #6bc7ce !important;
}

/* ---- 响应式 ---- */
@media (max-width: 1440px) {
  .server-watermark {
    font-size: 132px;
  }

  .server-head {
    height: 260px;
  }

  .server-head h1 {
    font-size: 44px;
  }

  .server-en {
    font-size: 24px;
  }

  .server-hero {
    height: 380px;
    background-size: cover;
  }

  .server-hero-copy {
    padding: 72px 32px 0 72px;
  }

  .server-hero-copy h2 {
    font-size: 42px;
  }

  .server-hero-copy p {
    font-size: 18px;
    margin-top: 28px;
  }

  .server-cards {
    gap: 28px;
    padding: 0 48px 56px;
    margin-top: -72px;
  }

  .server-card {
    min-height: 400px;
    padding: 36px 24px 32px;
  }
}

@media (max-width: 1200px) {
  .server-watermark {
    font-size: 108px;
  }

  .server-hero-copy h2 {
    font-size: 36px;
  }

  .server-cards {
    gap: 20px;
    padding: 0 32px 48px;
  }

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

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

  .server-card-icon {
    width: 108px;
    height: 108px;
    margin-bottom: 24px;
  }

  .server-card-icon span {
    font-size: 42px;
  }
}

@media (max-width: 768px) {
  .server-head {
    height: auto;
    min-height: 160px;
    padding: 48px 16px 28px;
  }

  .server-watermark {
    font-size: 64px;
    top: 50%;
  }

  .server-head h1 {
    font-size: 32px;
  }

  .server-en {
    font-size: 16px;
    margin-top: 6px;
  }

  .server-hero {
    height: 280px;
    background-size: cover;
    background-position: 72% center;
  }

  .server-hero::after {
    background: linear-gradient(
      90deg,
      rgba(16, 28, 46, 0.72) 0%,
      rgba(16, 28, 46, 0.45) 55%,
      rgba(16, 28, 46, 0.18) 100%
    );
  }

  .server-hero-copy {
    padding: 48px 20px 0;
    text-align: left;
  }

  .server-hero-copy h2 {
    font-size: 26px;
    letter-spacing: 0.02em;
  }

  .server-hero-copy .hero-gap {
    width: 0.35em;
  }

  .server-hero-copy p {
    font-size: 13px;
    margin-top: 16px;
  }

  .server-cards {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-top: -48px;
    padding: 0 16px 40px;
  }

  .server-card {
    min-height: 0;
    padding: 32px 20px 28px;
  }

  .server-card:hover {
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .server-card {
    animation: none;
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 480px) {
  .server-head {
    padding: 36px 16px 20px;
    min-height: 132px;
  }

  .server-watermark {
    font-size: 48px;
  }

  .server-head h1 {
    font-size: 26px;
  }

  .server-en {
    font-size: 13px;
  }

  .server-hero {
    height: 240px;
    background-position: 80% center;
  }

  .server-hero-copy {
    padding: 36px 16px 0;
  }

  .server-hero-copy h2 {
    font-size: 22px;
  }

  .server-hero-copy h2 .hero-gap {
    display: none;
  }

  .server-hero-copy p {
    font-size: 12px;
    margin-top: 12px;
  }

  .server-card-icon {
    width: 96px;
    height: 96px;
  }

  .server-card-icon span {
    font-size: 36px;
  }

  .server-card h3 {
    font-size: 20px;
    margin-bottom: 18px;
  }

  .server-card p {
    font-size: 13px;
    line-height: 1.75;
  }
}

/* ---- 物联网平台 ---- */
.server-plat {
  --plat-line: #004a8e;
  --plat-text: #00061c;
  --plat-btn: #002474;
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  padding-bottom: 88px;
  overflow: hidden;
  background: #fff;
  position: relative;
}

.plat-head {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 280px;
  padding: 40px 24px 24px;
  overflow: hidden;
}

.plat-head h2 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--server-title);
}

.plat-visual {
  position: relative;
  width: calc(100% - 210px);
  max-width: 1699px;
  margin: 0 auto;
}

.plat-hero {
  margin: 0;
  line-height: 0;
}

.plat-hero img {
  display: block;
  width: 100%;
  height: auto;
}

.plat-rail {
  position: absolute;
  left: 0;
  right: 0;
  top: 750px;
  height: 108px;
  z-index: 2;
  pointer-events: none;
}

.plat-rail-line {
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 1px;
  background: var(--plat-line);
  transform: translateY(-50%);
}

.plat-rail-stem {
  position: absolute;
  left: 50%;
  top: -18px;
  width: 2px;
  height: 72px;
  background: var(--plat-line);
  transform: translateX(-50%);
}

.plat-node {
  position: absolute;
  top: 50%;
  width: 108px;
  height: 108px;
  transform: translate(-50%, -50%);
  display: block;
}

.plat-node-1 { left: 26.8%; }
.plat-node-2 { left: 50%; }
.plat-node-3 { left: 73.4%; }

.plat-features {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: calc(100% - 210px);
  max-width: 1699px;
  margin: 36px auto 0;
  gap: 1px;
}

.plat-feature {
  text-align: left;
  padding: 0 20px;
  position: relative;
}

.plat-feature-icon {
  position: absolute;
  top: 0;
  left: 0;
  width: 100px;
  height: 100px;
}

.plat-feature-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.plat-feature:nth-child(1) {
  padding: 0 25px;
  box-sizing: border-box;
  width: 368px;
  border-right: 1px solid #002474;
}

.plat-feature:nth-child(1) .plat-feature-icon {
  top: -92px;
  left: 320px;
}

.plat-feature:nth-child(2) {
  padding: 0 40px;
  box-sizing: border-box;
  width: 391px;
  border-right: 1px solid #002474;
}

.plat-feature:nth-child(2) .plat-feature-icon {
  top: -92px;
  left: 340px;
}

.plat-feature:nth-child(3) {
  padding: 0 50px;
  box-sizing: border-box;
  width: 414px;
  border-right: 1px solid #002474;
}

.plat-feature:nth-child(3) .plat-feature-icon {
  top: -92px;
  left: 363px;
}

.plat-feature:nth-child(4) {
  padding: 0 40px 0 60px;
  box-sizing: border-box;
}

.plat-feature h3 {
  margin: 0 0 18px;
  font-size: 30px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--plat-text);
  padding: 30px 0 20px;
}

.plat-feature p {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.85;
  color: var(--plat-text);
  padding-bottom: 30px;
}

.plat-cta {
  display: flex;
  justify-content: center;
  margin-top: 56px;
}

.plat-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 240px;
  height: 62px;
  padding: 0 26px;
  background: var(--plat-btn);
  color: #fff;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.06em;
  border-radius: 6px;
  transition: background 0.2s ease, transform 0.2s ease;
  text-decoration: none;
}

.plat-cta a i {
  display: inline-block;
  width: 18px;
  height: 18px;
  margin-left: 10px;
  border-top: 2px solid #fff;
  border-right: 2px solid #fff;
  transform: rotate(45deg) translate(-2px, 2px);
}

.plat-cta a:hover {
  background: #00308f;
}

@media (max-width: 1440px) {
  .plat-head {
    height: 220px;
  }

  .plat-head h2 {
    font-size: 40px;
  }

  .plat-visual,
  .plat-features {
    width: calc(100% - 80px);
  }

  .plat-node {
    width: 88px;
    height: 88px;
  }

  .plat-feature:nth-child(1),
  .plat-feature:nth-child(2),
  .plat-feature:nth-child(3),
  .plat-feature:nth-child(4) {
    width: auto;
  }

  .plat-feature:nth-child(1) .plat-feature-icon {
    left: auto;
    right: 12px;
  }

  .plat-feature:nth-child(2) .plat-feature-icon {
    left: auto;
    right: 12px;
  }

  .plat-feature:nth-child(3) .plat-feature-icon {
    left: auto;
    right: 12px;
  }

  .plat-feature h3 {
    font-size: 18px;
  }

  .plat-feature p {
    font-size: 14px;
  }
}

@media (max-width: 1200px) {
  .plat-head {
    height: auto;
    min-height: 160px;
    padding: 36px 20px 16px;
  }

  .plat-head h2 {
    font-size: 32px;
    text-align: center;
  }

  .plat-visual {
    width: calc(100% - 48px);
  }

  .plat-features,
  .plat-feature,
  .plat-feature-icon {
    display: none !important;
  }

  .plat-cta a {
    min-width: 240px;
    height: 56px;
    font-size: 18px;
  }
}

@media (max-width: 768px) {
  .server-plat {
    padding-bottom: 48px;
  }

  .plat-head {
    height: auto;
    min-height: 0;
    padding: 36px 16px 12px;
  }

  .plat-head h2 {
    font-size: 24px;
    text-align: center;
  }

  .plat-visual,
  .plat-features {
    width: calc(100% - 32px);
    max-width: none;
  }

  .plat-hero {
    border-radius: 4px;
    overflow: hidden;
  }

  .plat-hero img {
    width: 100%;
    height: auto;
    max-height: none;
  }

  .plat-rail {
    display: none;
  }

  .plat-features {
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 20px;
  }

  .plat-feature,
  .plat-feature:nth-child(1),
  .plat-feature:nth-child(2),
  .plat-feature:nth-child(3),
  .plat-feature:nth-child(4) {
    width: 100%;
    max-width: none;
    padding: 20px 4px 20px;
    border-right: 0 !important;
    border-bottom: 1px solid rgba(0, 36, 116, 0.18);
    text-align: left;
  }

  .plat-feature:last-child {
    border-bottom: 0;
  }

  .plat-feature-icon,
  .plat-feature:nth-child(1) .plat-feature-icon,
  .plat-feature:nth-child(2) .plat-feature-icon,
  .plat-feature:nth-child(3) .plat-feature-icon {
    position: static;
    display: block;
    width: 44px;
    height: 44px;
    margin: 0 0 12px;
  }

  .plat-feature h3 {
    font-size: 18px;
    margin: 0 0 10px;
    padding: 0;
    line-height: 1.4;
  }

  .plat-feature p {
    font-size: 14px;
    line-height: 1.75;
    font-weight: 500;
    padding-bottom: 0;
  }

  .plat-cta {
    margin-top: 28px;
    padding: 0 16px;
  }

  .plat-cta a {
    width: 100%;
    max-width: 320px;
    min-width: 0;
    height: 48px;
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .plat-head {
    padding: 28px 12px 8px;
  }

  .plat-head h2 {
    font-size: 20px;
  }

  .plat-visual,
  .plat-features {
    width: calc(100% - 24px);
  }

  .plat-features {
    margin-top: 16px;
  }

  .plat-feature,
  .plat-feature:nth-child(1),
  .plat-feature:nth-child(2),
  .plat-feature:nth-child(3),
  .plat-feature:nth-child(4) {
    padding: 16px 2px;
  }

  .plat-feature-icon,
  .plat-feature:nth-child(1) .plat-feature-icon,
  .plat-feature:nth-child(2) .plat-feature-icon,
  .plat-feature:nth-child(3) .plat-feature-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 10px;
  }

  .plat-feature h3 {
    font-size: 16px;
  }

  .plat-feature p {
    font-size: 13px;
    line-height: 1.7;
  }

  .plat-cta {
    margin-top: 20px;
    padding: 0 12px;
  }

  .plat-cta a {
    height: 44px;
    font-size: 15px;
  }
}

/* ---- 锅炉节能改造 ---- */
.server-energy {
  --energy-text: #00061c;
  --energy-muted: #555;
  --energy-btn: #002474;
  --energy-shadow: 0 8px 28px rgba(15, 35, 70, 0.1);
  width: 100%;
  max-width: 1920px;
  margin: 0 auto;
  overflow: hidden;
  position: relative;
  min-height: 1730px;
}

.energy-head {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 280px;
  padding: 40px 24px 24px;
  overflow: hidden;
  background: #fff;
}

.energy-head h2 {
  position: relative;
  z-index: 1;
  margin: 0;
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--server-title);
}

.energy-stage {
  position: relative;
  padding: 410px 120px 0;
  background-color: #5a6268;
  background-repeat: no-repeat;
  background-position: center top;
  background-size: 100%;
  height: 580px;
}

.energy-grid {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 34px;
  padding: 700px 105px 0;
}

.energy-card {
  min-height: 380px;
  padding: 40px 36px 36px;
  background: #fff;
  border-radius: 12px;
  box-shadow: var(--energy-shadow);
  text-align: center;
  border: 1px solid #e7e5e5;
  cursor: pointer;
}
.energy-card:hover {
  border-color: #c9c9c9;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.16);
}

.energy-icon {
  display: block;
  width: 122px;
  height: 122px;
  margin: 0 auto 22px;
}

.energy-card h3 {
  margin: 0 0 16px;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--energy-text);
}

.energy-card p {
  margin: 0;
  font-size: 18px;
  line-height: 1.8;
  color: var(--energy-muted);
}

.energy-cta {
  display: flex;
  justify-content: center;
  padding: 56px 24px 80px;
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  box-sizing: border-box;
}

.energy-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 360px;
  height: 72px;
  padding: 0 36px;
  background: var(--energy-btn);
  color: #fff;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0.04em;
  border-radius: 6px;
  text-decoration: none;
  transition: background 0.2s ease, transform 0.2s ease;
}

.energy-cta a:hover {
  background: #00308f;
}

@media (max-width: 1440px) {
  .energy-head {
    height: 220px;
  }

  .energy-head h2 {
    font-size: 40px;
  }

  .energy-stage {
    padding: 160px 48px 0;
  }

  .energy-grid {
    gap: 24px;
  }

  .energy-card {
    min-height: 0;
    padding: 32px 24px 28px;
  }

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

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

@media (max-width: 1200px) {
  .energy-head h2 {
    font-size: 32px;
  }

  .energy-stage {
    padding: 140px 32px 0;
  }

  .energy-grid {
    gap: 16px;
  }

  .energy-icon {
    width: 56px;
    height: 56px;
    margin-bottom: 14px;
  }

  .energy-card h3 {
    font-size: 16px;
  }

  .energy-card p {
    font-size: 13px;
    line-height: 1.7;
  }

  .energy-cta a {
    min-width: 280px;
    height: 56px;
    font-size: 18px;
  }
}

@media (max-width: 768px) {
  .energy-head {
    height: auto;
    min-height: 140px;
    padding: 40px 16px 20px;
  }

  .energy-head h2 {
    font-size: 24px;
    text-align: center;
  }

  .energy-stage {
    padding: 100px 16px 0;
    background-position: center center;
  }

  .energy-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .energy-card {
    padding: 28px 20px 24px;
  }

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

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

  .energy-cta {
    padding: 32px 16px 48px;
  }

  .energy-cta a {
    width: 100%;
    max-width: 360px;
    min-width: 0;
    height: 48px;
    font-size: 16px;
  }
}

@media (max-width: 480px) {
  .energy-head h2 {
    font-size: 20px;
  }

  .energy-stage {
    padding-top: 72px;
  }

  .energy-card h3 {
    font-size: 16px;
  }

  .energy-card p {
    font-size: 13px;
  }
}