:root {
  --ink: #121418;
  --muted: #5d6672;
  --line: #e6e9ee;
  --paper: #f6f7f9;
  --white: #ffffff;
  --steel: #2e5f73;
  --accent: #c7852e;
  --deep: #0f171c;
  --green: #527568;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.7;
  background: var(--white);
}

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

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

.wrap {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid rgba(18, 20, 24, 0.08);
  backdrop-filter: blur(14px);
}

.nav-bar {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand strong {
  font-size: 21px;
  letter-spacing: 0;
  color: var(--deep);
}

.brand span {
  color: var(--steel);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
}

.nav-button {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  align-items: center;
  justify-content: center;
}

.nav-button span,
.nav-button span::before,
.nav-button span::after {
  width: 20px;
  height: 2px;
  display: block;
  background: var(--ink);
  content: "";
  position: relative;
}

.nav-button span::before {
  position: absolute;
  top: -7px;
}

.nav-button span::after {
  position: absolute;
  top: 7px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #2c3238;
  font-size: 15px;
}

.nav-links a {
  white-space: nowrap;
}

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

.top-phone {
  padding: 8px 13px;
  border: 1px solid rgba(199, 133, 46, 0.4);
  color: var(--accent);
  border-radius: 6px;
  font-weight: 700;
}

.hero {
  min-height: calc(100vh - 78px);
  display: flex;
  align-items: center;
  color: var(--white);
  background-size: cover;
  background-position: center;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 13, 16, 0.9), rgba(8, 13, 16, 0.64) 45%, rgba(8, 13, 16, 0.18));
}

.hero .wrap {
  position: relative;
  padding: 82px 0 110px;
}

.eyebrow {
  color: #d7b06d;
  font-weight: 700;
  font-size: 14px;
  margin: 0 0 12px;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.08;
  font-weight: 800;
  letter-spacing: 0;
}

.hero h1 {
  max-width: none;
  font-size: clamp(32px, 4.4vw, 54px);
  white-space: nowrap;
}

.hero p {
  max-width: 700px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 34px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: 700;
  border: 1px solid transparent;
}

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

.btn-primary:hover {
  background: #a96e22;
}

.btn-ghost {
  border-color: rgba(255, 255, 255, 0.45);
  color: var(--white);
}

.btn-light {
  border-color: var(--line);
  color: var(--deep);
  background: var(--white);
}

.hero-metrics {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, minmax(130px, 1fr));
  gap: 1px;
  max-width: 860px;
  background: rgba(255, 255, 255, 0.18);
}

.hero-metrics div {
  padding: 18px 20px;
  background: rgba(10, 17, 22, 0.58);
}

.hero-metrics strong {
  display: block;
  font-size: 24px;
}

.hero-metrics span {
  color: rgba(255, 255, 255, 0.72);
  font-size: 13px;
}

.band {
  padding: 78px 0;
}

.band-muted {
  background: var(--paper);
}

.sales-strip {
  background: var(--deep);
  color: rgba(255, 255, 255, 0.78);
  padding: 24px 0;
}

.sales-strip-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.sales-strip-grid div {
  padding: 18px 20px;
  background: #141e25;
}

.sales-strip-grid strong {
  display: block;
  color: var(--white);
  font-size: 18px;
  margin-bottom: 4px;
}

.sales-strip-grid span {
  font-size: 14px;
}

.site-flash {
  padding: 12px 0;
  background: rgba(46, 95, 115, 0.1);
  color: var(--steel);
  border-bottom: 1px solid rgba(46, 95, 115, 0.18);
  font-weight: 700;
}

.site-flash-error {
  background: rgba(179, 61, 61, 0.1);
  color: #9f2f2f;
}

.sic-knowledge {
  align-items: center;
}

.lead-capture {
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(7, 64, 124, 0.96), rgba(0, 106, 176, 0.9)),
    url("../images/hero-sic.webp") center / cover;
  padding: 34px 0;
}

.lead-capture-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(520px, 0.92fr);
  align-items: center;
  gap: 36px;
}

.lead-copy p {
  margin: 0 0 6px;
  color: rgba(255, 255, 255, 0.76);
  font-weight: 700;
}

.lead-copy h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.25;
}

.lead-copy span {
  display: block;
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.78);
}

.lead-form {
  display: grid;
  grid-template-columns: 0.7fr 0.9fr 1.25fr auto;
  gap: 10px;
  align-items: center;
}

.lead-form input {
  width: 100%;
  min-height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--ink);
  font: inherit;
}

.lead-form button {
  min-height: 44px;
  padding: 0 20px;
  border: 0;
  border-radius: 6px;
  color: var(--white);
  background: var(--accent);
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
}

.lead-form button:hover {
  background: #a96e22;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 34px;
}

.section-head h2 {
  margin: 0;
  font-size: 32px;
  line-height: 1.25;
}

.section-head p {
  margin: 10px 0 0;
  max-width: 660px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 22px;
}

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.home-product-grid,
.product-list-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.product-card,
.news-card,
.equipment-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.product-card:hover,
.news-card:hover,
.equipment-card:hover {
  transform: translateY(-3px);
  border-color: rgba(199, 133, 46, 0.45);
  box-shadow: 0 18px 42px rgba(18, 20, 24, 0.08);
}

.product-media,
.equipment-media {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  background: #dce2e6;
  overflow: hidden;
  flex: 0 0 auto;
}

.home-product-grid .product-media,
.product-list-grid .product-media {
  aspect-ratio: 4 / 3;
}

.product-media img,
.equipment-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-caption,
.news-card,
.equipment-body {
  padding: 18px 20px;
}

.tag {
  display: inline-block;
  color: var(--steel);
  background: rgba(46, 95, 115, 0.1);
  border-radius: 4px;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 700;
}

.product-caption,
.news-card h3,
.equipment-body h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.product-caption {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  border-top: 1px solid var(--line);
  background: var(--white);
  color: var(--deep);
  font-weight: 800;
  text-align: center;
}

.product-caption a:hover {
  color: var(--accent);
}

.product-body p,
.news-card p,
.equipment-body p,
.muted {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.75fr);
  gap: 48px;
  align-items: center;
}

.product-feature {
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1fr);
}

.split img {
  width: 100%;
  border-radius: var(--radius);
}

.product-feature > img {
  min-height: 430px;
  object-fit: cover;
  box-shadow: 0 18px 42px rgba(18, 20, 24, 0.1);
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 26px;
}

.feature {
  padding: 18px;
  border-left: 3px solid var(--accent);
  background: rgba(199, 133, 46, 0.08);
}

.feature strong {
  display: block;
  margin-bottom: 4px;
}

.page-hero {
  color: var(--white);
  background-size: cover;
  background-position: center;
  position: relative;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(8, 13, 16, 0.84), rgba(8, 13, 16, 0.5));
}

.page-hero .wrap {
  position: relative;
  padding: 86px 0 92px;
}

.page-hero p {
  max-width: 720px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
}

.breadcrumbs {
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.breadcrumbs a {
  color: var(--steel);
}

.pager {
  margin-top: 34px;
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  list-style: none;
}

.pager li a,
.pager li span {
  min-width: 38px;
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 12px;
  color: var(--ink);
}

.pager .active a {
  background: var(--steel);
  border-color: var(--steel);
  color: var(--white);
}

.article {
  max-width: 920px;
  margin: 0 auto;
}

.product-detail {
  max-width: 1040px;
}

.product-detail-head {
  text-align: center;
}

.article h1 {
  font-size: 36px;
  line-height: 1.25;
  margin: 0 0 12px;
}

.article-meta {
  color: var(--muted);
  margin-bottom: 22px;
}

.product-detail-media {
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 34px;
  padding: 28px;
  max-width: 920px;
  min-height: 360px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8fafc;
  box-shadow: 0 18px 42px rgba(18, 20, 24, 0.06);
}

.product-detail-media img {
  width: auto;
  max-width: 100%;
  max-height: 560px;
  object-fit: contain;
  margin: 0 auto;
  border-radius: 6px;
}

.article-content {
  font-size: 17px;
  max-width: 920px;
  margin: 0 auto;
}

.article-content img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 22px auto;
  border-radius: var(--radius);
}

.contact-panel {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.contact-process {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.contact-process div,
.inquiry-inner {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.contact-process div {
  padding: 18px 20px;
}

.contact-process strong {
  display: block;
  color: var(--deep);
  margin-bottom: 4px;
}

.contact-process span {
  color: var(--muted);
}

.inquiry-band {
  padding: 42px 0;
  background: linear-gradient(90deg, #101820, #20313b);
  color: var(--white);
}

.inquiry-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.18);
}

.inquiry-inner h2 {
  margin: 0;
  font-size: 30px;
}

.inquiry-inner p {
  margin: 8px 0 0;
  max-width: 740px;
  color: rgba(255, 255, 255, 0.76);
}

.contact-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--white);
}

.contact-item span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.contact-item strong {
  font-size: 19px;
}

.site-footer {
  background: var(--deep);
  color: rgba(255, 255, 255, 0.78);
  padding: 50px 0 26px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 36px;
}

.site-footer h3,
.site-footer h4 {
  color: var(--white);
  margin-top: 0;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.copyright {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  margin-top: 32px;
  padding-top: 20px;
  font-size: 13px;
}

.floating-contact {
  position: fixed;
  right: 18px;
  top: 42%;
  z-index: 30;
  display: grid;
  gap: 8px;
  width: 154px;
}

.floating-contact a {
  display: block;
  padding: 10px 12px;
  border-radius: 6px;
  background: var(--deep);
  color: var(--white);
  text-align: center;
  font-weight: 700;
  box-shadow: 0 12px 30px rgba(18, 20, 24, 0.18);
}

.floating-contact .floating-phone {
  background: var(--accent);
}

.floating-contact strong {
  font-size: 15px;
}

@media (max-width: 920px) {
  .nav-button {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 78px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 12px 20px 18px;
    background: var(--white);
    border-bottom: 1px solid var(--line);
  }

  .nav-toggle:checked ~ .nav-links {
    display: flex;
  }

  .nav-links a {
    width: 100%;
    padding: 10px 0;
  }

  .top-phone {
    margin-top: 6px;
  }

  .grid-3,
  .grid-4,
  .home-product-grid,
  .product-list-grid,
  .grid-2,
  .hero-metrics,
  .sales-strip-grid,
  .lead-capture-inner,
  .split,
  .footer-grid,
  .contact-panel,
  .contact-process {
    grid-template-columns: 1fr;
  }

  .section-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .inquiry-inner {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .floating-contact {
    left: 0;
    right: 0;
    top: auto;
    bottom: 0;
    width: 100%;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: rgba(16, 24, 32, 0.2);
  }

  .floating-contact a {
    border-radius: 0;
    box-shadow: none;
    padding: 9px 6px;
    font-size: 13px;
  }

  .site-footer {
    padding-bottom: 86px;
  }

  .hero {
    min-height: auto;
  }

  .hero .wrap {
    padding: 76px 0 82px;
  }
}

@media (max-width: 560px) {
  .wrap {
    width: min(100% - 28px, 1180px);
  }

  .nav-bar {
    height: 68px;
  }

  .nav-links {
    top: 68px;
  }

  .brand strong {
    font-size: 18px;
  }

  .brand span {
    display: none;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 34px;
    white-space: normal;
  }

  .product-detail-media {
    min-height: 220px;
    padding: 14px;
  }

  .band {
    padding: 54px 0;
  }

  .feature-list {
    grid-template-columns: 1fr;
  }
}