:root {
  --ink: #132235;
  --muted: #5c6b7d;
  --blue: #0a4f86;
  --blue-2: #08395f;
  --orange: #e95b2a;
  --orange-2: #c84418;
  --green: #2f7d65;
  --mist: #f3f7fb;
  --line: #dbe4ee;
  --white: #fff;
  --shadow: 0 18px 46px rgba(9, 42, 76, .12);
  --radius: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
label {
  display: grid;
  gap: 7px;
  color: #263f59;
  font-weight: 800;
}
input, textarea, select {
  width: 100%;
  padding: 13px 14px;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 6px;
}
textarea { resize: vertical; }
form { display: grid; gap: 16px; }

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 8px 5vw;
  color: #e6f0f9;
  background: var(--blue-2);
  font-size: 13px;
}
.topbar a { color: #fff; font-weight: 700; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 76px;
  padding: 0 5vw;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 258px;
}
.brand-logo {
  width: 58px;
  height: 58px;
  object-fit: contain;
  border-radius: 6px;
}
.brand strong {
  display: block;
  color: var(--blue-2);
  font-size: 17px;
  line-height: 1.2;
}
.brand span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}
.nav {
  display: flex;
  justify-content: center;
  gap: 28px;
  color: #223a55;
  font-size: 15px;
  font-weight: 700;
}
.nav a {
  position: relative;
  padding: 27px 0;
}
.nav a::after {
  position: absolute;
  right: 0;
  bottom: 18px;
  left: 0;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transition: transform .18s ease;
  content: "";
}
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.header-phone {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 12px;
  color: var(--blue-2);
  background: #fff7f3;
  border: 1px solid rgba(233,91,42,.28);
  border-radius: 6px;
  font-size: 16px;
  font-weight: 900;
  white-space: nowrap;
}
.icon-btn, .menu-btn {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  cursor: pointer;
}
.menu-btn { display: none; }
.cta, .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 800;
  cursor: pointer;
}
.cta, .btn.primary { color: #fff; background: var(--orange); box-shadow: 0 10px 22px rgba(233,91,42,.22); }
.btn.secondary { color: var(--blue-2); background: #fff; border-color: rgba(10,79,134,.24); }
.btn:hover, .cta:hover { transform: translateY(-1px); }

.hero {
  display: grid;
  grid-template-columns: minmax(360px, .9fr) minmax(440px, 1.1fr);
  gap: 42px;
  align-items: center;
  padding: 50px 5vw 42px;
  background: linear-gradient(180deg, #f7fbff 0%, #fff 78%);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--green);
  font-size: 14px;
  font-weight: 900;
}
.eyebrow::before {
  width: 9px;
  height: 9px;
  background: var(--orange);
  border-radius: 50%;
  content: "";
}
h1, h2, h3, p { margin-top: 0; }
h1 {
  margin-bottom: 18px;
  color: var(--blue-2);
  font-size: clamp(36px, 4.4vw, 58px);
  line-height: 1.12;
  font-weight: 900;
}
.hero p { max-width: 720px; color: #334c66; font-size: 18px; }
.hero-actions, .inline-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.phone-cta { font-size: 16px; }
.quick-brief {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 8px;
  margin-top: 20px;
}
.quick-brief span {
  padding: 9px 10px;
  color: var(--blue-2);
  background: #fff;
  border: 1px solid rgba(10,79,134,.18);
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 900;
  text-align: center;
}
.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 12px;
  margin-top: 30px;
}
.trust-item {
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.trust-item strong { display: block; color: var(--blue); font-size: 24px; line-height: 1.1; }
.trust-item span { color: var(--muted); font-size: 13px; }
.hero-media {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-media img { width: 100%; height: 520px; object-fit: cover; }
.hero-slider { background: #dce8f2; }
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transform: scale(1.02);
  transition: opacity .45s ease, transform .45s ease;
  pointer-events: none;
}
.hero-slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}
.media-badge {
  position: absolute;
  right: 22px;
  bottom: 22px;
  max-width: 330px;
  padding: 18px;
  color: #fff;
  background: rgba(8,57,95,.9);
  border: 1px solid rgba(255,255,255,.22);
  border-radius: var(--radius);
}
.media-badge strong { display: block; font-size: 28px; }
.hero-dots {
  position: absolute;
  left: 22px;
  bottom: 22px;
  z-index: 3;
  display: flex;
  gap: 8px;
}
.hero-dots button {
  width: 34px;
  height: 8px;
  padding: 0;
  background: rgba(255,255,255,.72);
  border: 0;
  border-radius: 999px;
  cursor: pointer;
}
.hero-dots button.active { background: var(--orange); }
.section { padding: 78px 5vw; }
.section.alt { background: var(--mist); }
.section.dark { color: #fff; background: linear-gradient(135deg, var(--blue-2), #0d638f); }
.section-head { max-width: 820px; margin-bottom: 34px; }
.section-head.center { margin-right: auto; margin-left: auto; text-align: center; }
.section-head h2, .page-title h1 { margin-bottom: 12px; color: var(--blue-2); font-size: clamp(30px, 3.4vw, 46px); line-height: 1.18; }
.section.dark .section-head h2, .section.dark .section-head p { color: #fff; }
.section-head p, .page-title p { color: var(--muted); font-size: 17px; }

.grid { display: grid; gap: 18px; }
.grid.cols-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid.cols-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.cols-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 10px 26px rgba(9,42,76,.07);
}
.card-body { padding: 20px; }
.card h3 { color: #102d4a; font-size: 21px; line-height: 1.3; }
.card h3 a { color: #102d4a; }
.card h3 a:hover { color: var(--orange-2); }
.card p, .card li { color: var(--muted); font-size: 15px; }
.card img { width: 100%; height: 210px; object-fit: cover; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.tag {
  display: inline-flex;
  padding: 4px 9px;
  color: var(--blue);
  background: #eaf3fb;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
}
.link-more { display: inline-flex; margin-top: 14px; color: var(--orange-2); font-weight: 900; }
.section-callout {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 16px;
  align-items: center;
  margin-top: 22px;
  padding: 18px 20px;
  background: #fff7f3;
  border: 1px solid rgba(233,91,42,.24);
  border-radius: var(--radius);
}
.section-callout strong { color: var(--blue-2); font-size: 18px; }
.section-callout span { color: #40566d; }
.section-callout a { color: var(--orange-2); font-size: 22px; font-weight: 900; white-space: nowrap; }
.quote-checklist {
  display: grid;
  grid-template-columns: repeat(5, minmax(0,1fr));
  gap: 12px;
}
.quote-checklist div {
  padding: 18px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.quote-checklist strong {
  display: block;
  margin-bottom: 10px;
  color: var(--orange);
  font-size: 28px;
  line-height: 1;
}
.quote-checklist span {
  color: #263f59;
  font-weight: 900;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 16px;
}
.scenario-item {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.scenario-item h3 {
  margin-bottom: 10px;
  color: #102d4a;
  font-size: 21px;
}
.scenario-item p { margin-bottom: 0; color: var(--muted); }
.scenario-item.accent {
  background: #fff7f3;
  border-color: rgba(233,91,42,.28);
}
.scenario-item.accent h3 { color: var(--blue-2); }
.scenario-item.accent p { color: #40566d; }
.scenario-item.accent a { color: var(--orange-2); }
.scenario-item.accent a {
  display: inline-flex;
  margin-top: 16px;
  font-size: 20px;
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.product-type-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0,1fr));
  gap: 12px;
}
.product-type-grid div {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.product-type-grid h3 {
  margin-bottom: 8px;
  color: #102d4a;
  font-size: 18px;
}
.product-type-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}
.strength-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 14px;
  margin-bottom: 28px;
}
.strength-grid div {
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 26px rgba(9,42,76,.06);
}
.strength-grid strong {
  display: block;
  color: var(--blue);
  font-size: 32px;
  line-height: 1.1;
}
.strength-grid span {
  display: block;
  margin: 7px 0 8px;
  color: var(--blue-2);
  font-weight: 900;
}
.strength-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
}
.spec-table { margin-top: 8px; }

.split {
  display: grid;
  grid-template-columns: minmax(320px, .9fr) minmax(420px, 1.1fr);
  gap: 42px;
  align-items: center;
}
.split img { border-radius: var(--radius); box-shadow: var(--shadow); }
.feature-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.feature-list li {
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius);
}

.process {
  counter-reset: step;
  display: grid;
  grid-template-columns: repeat(5, minmax(0,1fr));
  gap: 12px;
}
.process div {
  position: relative;
  padding: 22px 16px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius);
}
.process div::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  margin-bottom: 18px;
  color: #ffcfbd;
  font-size: 30px;
  font-weight: 900;
  line-height: 1;
}
.process strong { display: block; font-size: 18px; }
.process span { color: rgba(255,255,255,.82); font-size: 14px; }

.faq { display: grid; gap: 12px; }
.faq-item {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.faq-question {
  display: flex;
  justify-content: space-between;
  width: 100%;
  padding: 18px 20px;
  color: var(--ink);
  background: none;
  border: 0;
  text-align: left;
  font-weight: 900;
  cursor: pointer;
}
.faq-answer { display: none; padding: 0 20px 18px; color: var(--muted); }
.faq-item.open .faq-answer { display: block; }

.page-hero {
  padding: 58px 5vw;
  background: linear-gradient(135deg, #eff6fd, #fff);
  border-bottom: 1px solid var(--line);
}
.breadcrumb { margin-bottom: 16px; color: var(--muted); font-size: 14px; }
.breadcrumb a { color: var(--blue); font-weight: 800; }
.content-layout {
  display: grid;
  grid-template-columns: minmax(0,1fr) 320px;
  gap: 28px;
  align-items: start;
}
.sidebar {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 16px;
}
.panel {
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.panel h3 { margin-bottom: 12px; font-size: 20px; }
.panel ul { margin: 0; padding-left: 18px; color: var(--muted); }
.rich-text {
  display: grid;
  gap: 18px;
}
.rich-text h2 {
  margin: 12px 0 0;
  color: var(--blue-2);
  font-size: clamp(26px, 2.8vw, 38px);
  line-height: 1.2;
}
.rich-text h3 {
  margin: 8px 0 0;
  color: #102d4a;
  font-size: 22px;
}
.rich-text p, .rich-text li {
  color: #40566d;
  font-size: 16px;
}
.info-table {
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  border-spacing: 0;
}
.info-table th, .info-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
.info-table th {
  width: 26%;
  color: var(--blue-2);
  background: #eef5fb;
}
.info-table tr:last-child th, .info-table tr:last-child td { border-bottom: 0; }

.contact-band {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 36px 5vw;
  color: #fff;
  background: var(--blue-2);
}
.contact-band p { margin: 0; color: rgba(255,255,255,.84); }
.contact-band .band-phone {
  margin-top: 8px;
  color: #fff;
  font-size: 20px;
  font-weight: 900;
}
.contact-band .band-phone a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.site-footer {
  padding: 48px 5vw 24px;
  color: #d7e4ef;
  background: #081f35;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, .8fr);
  gap: 28px;
  margin-bottom: 32px;
}
.site-footer h3 { color: #fff; font-size: 18px; }
.site-footer a, .site-footer p { color: #d7e4ef; font-size: 14px; }
.footer-links { display: grid; gap: 8px; }
.copyright { padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); font-size: 13px; }

.float-actions {
  position: fixed;
  right: 18px;
  bottom: 20px;
  z-index: 30;
  display: grid;
  gap: 8px;
}
.float-actions a, .float-actions button {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  color: #fff;
  background: var(--orange);
  border: 0;
  border-radius: 50%;
  box-shadow: var(--shadow);
  cursor: pointer;
}
.search-dialog {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: none;
  padding: 8vh 5vw;
  background: rgba(8,31,53,.62);
}
.search-dialog.open { display: block; }
.search-box {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.search-box input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
.search-results { display: grid; gap: 10px; margin-top: 16px; }
.search-results a { padding: 12px; background: var(--mist); border-radius: 6px; }

@media (max-width: 1080px) {
  .nav { display: none; }
  .menu-btn { display: inline-grid; }
  .site-header { grid-template-columns: auto auto; justify-content: space-between; }
  .header-actions .cta { display: none; }
  .header-phone { display: none; }
  .site-header.open .nav {
    position: absolute;
    top: 76px;
    right: 0;
    left: 0;
    display: grid;
    gap: 0;
    justify-content: stretch;
    padding: 8px 5vw 16px;
    background: #fff;
    border-bottom: 1px solid var(--line);
  }
  .site-header.open .nav a { padding: 12px 0; }
  .hero, .split, .content-layout { grid-template-columns: 1fr; }
  .hero-media, .hero-media img { min-height: 360px; height: 360px; }
  .grid.cols-4, .grid.cols-3 { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .scenario-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .product-type-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .strength-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .quote-checklist { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .section-callout { grid-template-columns: 1fr; }
  .process { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .sidebar { position: static; }
}
@media (max-width: 680px) {
  .topbar { display: none; }
  .brand { min-width: 0; }
  .brand strong { font-size: 15px; }
  .brand span { display: none; }
  .hero, .section, .page-hero { padding-right: 18px; padding-left: 18px; }
  .quick-brief, .trust-strip, .grid.cols-4, .grid.cols-3, .grid.cols-2, .scenario-grid, .product-type-grid, .strength-grid, .quote-checklist, .process, .footer-grid, .contact-band {
    grid-template-columns: 1fr;
  }
  .media-badge { right: 14px; bottom: 14px; left: 14px; }
  .contact-band { text-align: left; }
  .float-actions { right: 12px; bottom: 12px; }
}