:root {
  --ink: #17212b;
  --muted: #637184;
  --line: #dde5ed;
  --panel: #f6f8fb;
  --deep: #102638;
  --blue: #146aa6;
  --red: #bd1f2d;
  --steel: #7b8b9a;
  --white: #fff;
  --shadow: 0 20px 60px rgba(18, 34, 49, .12);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font-family: Arial, "Microsoft YaHei", sans-serif;
  background: #fff;
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, .97);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 8px clamp(18px, 4vw, 56px);
  color: #d8e6f0;
  font-size: 13px;
  background: var(--deep);
}

.topbar a { color: inherit; }
.topbar i {
  display: inline-block;
  width: 1px;
  height: 12px;
  margin: 0 12px;
  vertical-align: -2px;
  background: rgba(255,255,255,.35);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 76px;
  padding: 0 clamp(18px, 4vw, 56px);
}

.logo img {
  width: 178px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: #26313e;
  font-size: 15px;
  white-space: nowrap;
  list-style: none;
}

.nav-phone {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 0 15px;
  color: var(--white);
  font-size: 14px;
  font-weight: 800;
  background: var(--red);
  border-radius: 4px;
  white-space: nowrap;
}

.nav ul,
.nav li {
  display: contents;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav a {
  padding: 26px 0;
  border-bottom: 3px solid transparent;
}

.nav a:hover { color: var(--red); border-color: var(--red); }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 44vw);
  gap: clamp(28px, 5vw, 68px);
  align-items: center;
  min-height: 720px;
  padding: clamp(40px, 6vw, 76px) clamp(18px, 4vw, 56px) 48px;
  background:
    linear-gradient(115deg, rgba(255,255,255,.97) 0%, rgba(255,255,255,.92) 48%, rgba(239,244,249,.82) 100%),
    linear-gradient(180deg, rgba(16,38,56,.04), rgba(16,38,56,0)),
    var(--panel);
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--red);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  max-width: 760px;
  margin-bottom: 20px;
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 8px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

.lead {
  max-width: 690px;
  color: #465569;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 30px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-weight: 700;
}

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

.btn.ghost {
  color: var(--deep);
  background: var(--white);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 650px;
  margin: 0;
}

.metrics div {
  padding: 18px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.metrics dt {
  color: var(--blue);
  font-size: 28px;
  font-weight: 800;
}

.metrics dd {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.hero-media {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.hero-media::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 34%;
  background: linear-gradient(180deg, rgba(16,38,56,0), rgba(16,38,56,.38));
}

.hero-media img {
  width: 100%;
  height: 100%;
  min-height: 520px;
  object-fit: cover;
}

.section {
  padding: clamp(52px, 7vw, 92px) clamp(18px, 4vw, 56px);
}

.section-head {
  max-width: 820px;
  margin-bottom: 34px;
}

.section-head p {
  color: var(--muted);
  font-size: 17px;
}

.section-head.split {
  display: grid;
  grid-template-columns: minmax(0, .8fr) minmax(320px, .9fr);
  gap: 32px;
  align-items: end;
  max-width: none;
}

.product-band { background: var(--white); }

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.category-card {
  display: grid;
  grid-template-columns: 1fr;
  overflow: hidden;
  min-height: 300px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 12px 34px rgba(18, 34, 49, .07);
}

.category-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.category-card div { padding: 34px; }

.category-card span {
  color: var(--red);
  font-weight: 800;
}

.category-card p { color: var(--muted); }

.category-card a {
  display: inline-flex;
  margin-top: 12px;
  color: var(--blue);
  font-weight: 700;
}

.category-card.dark {
  color: var(--white);
  background: var(--deep);
  border-color: var(--deep);
}

.category-card.dark p { color: #c8d6e4; }
.category-card.dark a { color: var(--white); }

.material-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.material-grid a {
  display: flex;
  align-items: center;
  min-height: 86px;
  padding: 18px;
  font-weight: 800;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}

.material-grid a:hover {
  color: var(--white);
  background: var(--blue);
  border-color: var(--blue);
}

.showcase { background: #eef3f7; }

.longtail-band {
  background:
    linear-gradient(180deg, #ffffff 0%, #f2f6fa 100%);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.topic-grid a {
  position: relative;
  display: grid;
  gap: 10px;
  min-height: 170px;
  padding: 26px;
  overflow: hidden;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 12px 34px rgba(18, 34, 49, .07);
}

.topic-grid a::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--red);
}

.topic-grid span {
  color: var(--red);
  font-size: 13px;
  font-weight: 800;
}

.topic-grid strong {
  font-size: 24px;
  line-height: 1.25;
}

.topic-grid em {
  color: var(--muted);
  font-style: normal;
}

.topic-grid a:hover {
  transform: translateY(-2px);
  border-color: #c8d4df;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.product-grid article {
  overflow: hidden;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 0 12px 34px rgba(18, 34, 49, .06);
}

.product-grid img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.product-grid h3,
.product-grid p {
  padding-inline: 22px;
}

.product-grid h3 { padding-top: 22px; }
.product-grid p { padding-bottom: 22px; color: var(--muted); }

.capability {
  display: grid;
  grid-template-columns: minmax(0, .82fr) minmax(360px, 1fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: start;
  background:
    linear-gradient(135deg, rgba(189,31,45,.16), rgba(20,106,166,.08)),
    var(--deep);
  color: var(--white);
}

.capability p { color: #c8d6e4; }

.process-list {
  display: grid;
  gap: 12px;
}

.process-list div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 22px;
  border: 1px solid rgba(255,255,255,.18);
  border-radius: 6px;
  background: rgba(255,255,255,.06);
}

.process-list strong { font-size: 18px; }
.process-list span { color: #c8d6e4; text-align: right; }

.contact {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contact p { max-width: 650px; color: var(--muted); }

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.phone-link {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 18px;
  color: var(--deep);
  font-weight: 800;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 4px;
}

.wechat-card {
  display: grid;
  justify-items: center;
  gap: 8px;
  min-width: 126px;
  padding: 12px;
  color: #d8e6f0;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: 6px;
}

.wechat-card.light {
  color: var(--muted);
  background: var(--panel);
  border-color: var(--line);
}

.wechat-card img {
  width: 96px;
  height: 96px;
  object-fit: cover;
  background: #fff;
  border-radius: 4px;
}

.wechat-card span {
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}

.site-footer {
  display: grid;
  gap: 24px;
  padding: 42px clamp(18px, 4vw, 56px) 30px;
  color: #c8d6e4;
  background: #101821;
}

.footer-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.footer-pro {
  display: grid;
  grid-template-columns: minmax(260px, 1.35fr) repeat(3, minmax(170px, .8fr));
  align-items: start;
  gap: clamp(24px, 4vw, 54px);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.footer-column {
  display: grid;
  gap: 10px;
  align-content: start;
}

.footer-column h3 {
  margin: 0 0 6px;
  color: #fff;
  font-size: 17px;
}

.footer-column a,
.footer-column span {
  color: #c8d6e4;
  font-size: 14px;
}

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

.footer-brand {
  align-items: flex-start;
  flex-direction: column;
}

.footer-brand p {
  max-width: 420px;
  color: #c8d6e4;
}

.footer-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-badges span {
  padding: 5px 9px;
  color: #d8e6f0;
  font-size: 13px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 4px;
}

.footer-contact-card {
  padding: 18px;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 4px;
}

.footer-quote {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  margin-top: 6px;
  padding: 0 14px;
  color: #fff !important;
  font-weight: 800;
  background: var(--red);
  border-radius: 4px;
}

.footer-keywords {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  padding: 18px 0 4px;
  border-top: 1px solid rgba(255,255,255,.1);
}

.footer-keywords strong {
  margin-right: 4px;
  color: #fff;
  font-size: 15px;
}

.footer-keywords a {
  padding: 6px 10px;
  color: #c8d6e4;
  font-size: 13px;
  background: rgba(255,255,255,.055);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 4px;
}

.footer-keywords a:hover {
  color: #fff;
  border-color: rgba(255,255,255,.28);
}

.footer-legal {
  padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,.12);
  color: #aebdca;
  font-size: 14px;
}

.site-footer img { width: 150px; flex: 0 0 auto; }
.site-footer p { margin: 0; }

.mnav {
  display: none;
  padding: 8px 12px;
  color: var(--white);
  background: var(--deep);
  border-radius: 4px;
  font-size: 14px;
}

.archive-wrap,
.single-wrap {
  padding: 0 clamp(18px, 4vw, 56px) clamp(56px, 7vw, 92px);
  background: var(--white);
}

.archive-head {
  padding: clamp(48px, 7vw, 86px) 0 36px;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(115deg, rgba(246,248,251,.92), rgba(255,255,255,1));
}

.archive-head h1 {
  max-width: 900px;
  margin-bottom: 12px;
  font-size: clamp(34px, 4vw, 54px);
}

.archive-head p {
  max-width: 780px;
  color: var(--muted);
}

.inner-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 24px;
}

.archive-list {
  padding-top: 34px;
}

.inner-support {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 40px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.inner-support div {
  display: grid;
  gap: 6px;
  padding: 20px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.inner-support strong {
  font-size: 18px;
}

.inner-support span {
  color: var(--muted);
}

.post-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.post-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  box-shadow: 0 12px 34px rgba(18, 34, 49, .06);
}

.post-card-img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.post-card-body {
  padding: 22px;
}

.post-card-body h2 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.32;
}

.post-card-body p {
  color: var(--muted);
}

.post-cat {
  margin-bottom: 8px;
  color: var(--red) !important;
  font-size: 13px;
  font-weight: 800;
}

.more {
  color: var(--blue);
  font-weight: 800;
}

.page-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 34px;
}

.page-nav a,
.page-nav span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  height: 38px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.page-nav .current {
  color: var(--white);
  background: var(--red);
  border-color: var(--red);
}

.empty {
  padding: 44px;
  color: var(--muted);
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--panel);
}

.single-article {
  max-width: 1040px;
  margin: 0 auto;
  padding-top: clamp(48px, 7vw, 86px);
}

.single-head {
  margin-bottom: 30px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.single-head h1 {
  max-width: 920px;
  margin-bottom: 14px;
  font-size: clamp(34px, 4vw, 56px);
}

.single-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--muted);
  font-size: 14px;
}

.single-content {
  color: #2d3744;
  font-size: 17px;
  line-height: 1.85;
}

.single-content img {
  height: auto;
  margin: 22px auto;
  border-radius: 6px;
}

.single-content h2,
.single-content h3 {
  margin-top: 32px;
}

.article-inquiry {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  margin-top: 42px;
  padding: 28px;
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(189,31,45,.18), rgba(20,106,166,.08)),
    var(--deep);
  border-radius: 6px;
}

.article-inquiry h2 {
  margin-bottom: 10px;
  font-size: clamp(24px, 2.5vw, 34px);
}

.article-inquiry p {
  max-width: 680px;
  margin-bottom: 0;
  color: #d8e6f0;
}

.article-inquiry .phone-link {
  color: var(--white);
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.24);
}

.single-content table {
  width: 100%;
  border-collapse: collapse;
}

.single-content th,
.single-content td {
  padding: 10px;
  border: 1px solid var(--line);
}

.tag-box {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.tag-box a {
  padding: 7px 12px;
  color: var(--blue);
  background: var(--panel);
  border-radius: 4px;
}

@media (max-width: 1080px) {
  .nav { gap: 14px; font-size: 14px; }
  .nav-phone { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-media { min-height: 420px; }
  .hero-media img { min-height: 420px; }
  .category-grid,
  .product-grid,
  .capability,
  .section-head.split {
    grid-template-columns: 1fr;
  }
  .material-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .topic-grid { grid-template-columns: 1fr; }
  .post-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .inner-support { grid-template-columns: 1fr; }
  .article-inquiry { align-items: flex-start; flex-direction: column; }
  .footer-pro { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .site-header { position: relative; }
  .topbar { display: none; }
  .nav-wrap { align-items: flex-start; flex-direction: column; padding-block: 14px; }
  .mnav { display: inline-flex; }
  .nav { width: 100%; overflow-x: auto; padding-bottom: 4px; }
  .nav a { padding: 8px 0; }
  .hero { padding-top: 34px; }
  .metrics,
  .material-grid {
    grid-template-columns: 1fr;
  }
  .category-card {
    grid-template-columns: 1fr;
  }
  .category-card img { aspect-ratio: 4 / 3; }
  .topic-grid a { min-height: 140px; }
  .process-list div,
  .contact,
  .site-footer,
  .footer-main,
  .footer-brand {
    align-items: flex-start;
    flex-direction: column;
  }
  .footer-pro { grid-template-columns: 1fr; }
  .footer-keywords { align-items: flex-start; flex-direction: column; }
  .process-list span { text-align: left; }
  .post-grid { grid-template-columns: 1fr; }
  .contact-actions,
  .inner-actions {
    align-items: stretch;
    flex-direction: column;
    width: 100%;
  }
  .contact-actions .btn,
  .contact-actions .phone-link,
  .inner-actions .btn,
  .inner-actions .phone-link {
    width: 100%;
  }
  .wechat-card {
    width: 100%;
    justify-items: start;
    grid-template-columns: auto 1fr;
    align-items: center;
  }
}