:root {
  --ink: #102235;
  --navy: #0b1d30;
  --navy-2: #17384f;
  --red: #dc3d35;
  --red-dark: #b92923;
  --green: #24765a;
  --paper: #ffffff;
  --soft: #eef3f6;
  --line: #d6e0e7;
  --muted: #586c7e;
  --shadow: 0 18px 46px rgba(16, 34, 53, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body.sfgeo-body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, "Helvetica Neue", sans-serif;
  line-height: 1.65;
}
body.sfgeo-cn { font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif; }
body.sfgeo-body img { display: block; max-width: 100%; }
body.sfgeo-body a { color: inherit; }
body.sfgeo-body h1,
body.sfgeo-body h2,
body.sfgeo-body h3,
body.sfgeo-body p { overflow-wrap: anywhere; }
body.sfgeo-body h1,
body.sfgeo-body h2,
body.sfgeo-body h3 { letter-spacing: 0; }

.sfgeo-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.97);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 9px 28px rgba(16, 34, 53, 0.08);
  backdrop-filter: blur(14px);
}
.sfgeo-cn .sfgeo-header { background: rgba(11, 29, 48, 0.98); border-color: rgba(255, 255, 255, 0.14); }
.sfgeo-nav-wrap {
  width: min(1320px, calc(100% - 40px));
  min-height: 78px;
  margin: auto;
  display: flex;
  align-items: center;
  gap: 25px;
}
.sfgeo-brand {
  display: block;
  flex: 0 0 auto;
  color: var(--ink);
  text-decoration: none;
}
.sfgeo-brand-logo { display: block; width: 230px; max-width: 38vw; height: auto; }
.sfgeo-cn .sfgeo-brand { color: #ffffff; }
.sfgeo-cn .sfgeo-brand-logo { width: 250px; }
.sfgeo-header nav { display: flex; align-items: center; justify-content: center; flex: 1 1 auto; gap: 23px; }
.sfgeo-header nav a { color: #2e4255; text-decoration: none; font-size: 14px; font-weight: 800; transition: color 0.2s; }
.sfgeo-header nav a:hover { color: var(--red); }
.sfgeo-cn .sfgeo-header nav a { color: #dce7ef; }
.sfgeo-cn .sfgeo-header nav a:hover { color: #ffffff; }
.sfgeo-nav-cta,
.sfgeo-button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 22px;
  background: var(--red);
  color: #ffffff !important;
  border: 1px solid var(--red);
  border-radius: 4px;
  text-decoration: none;
  font-size: 14px;
  font-weight: 900;
  transition: background 0.2s, border-color 0.2s, transform 0.2s;
}
.sfgeo-nav-cta:hover,
.sfgeo-button:hover { background: var(--red-dark); border-color: var(--red-dark); transform: translateY(-2px); }
.sfgeo-menu-button {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
}
.sfgeo-menu-button span { position: absolute; left: 10px; right: 10px; height: 2px; background: var(--ink); }
.sfgeo-menu-button span:nth-child(1) { top: 12px; }
.sfgeo-menu-button span:nth-child(2) { top: 20px; }
.sfgeo-menu-button span:nth-child(3) { top: 28px; }
.sfgeo-cn .sfgeo-menu-button { border-color: rgba(255,255,255,.3); }
.sfgeo-cn .sfgeo-menu-button span { background: #ffffff; }

.sfgeo-breadcrumb {
  width: min(1240px, calc(100% - 40px));
  min-height: 54px;
  margin: auto;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  color: #687d8f;
  font-size: 13px;
}
.sfgeo-breadcrumb a { text-decoration: none; color: #344b60; font-weight: 700; }
.sfgeo-breadcrumb a:hover { color: var(--red); }

.sfgeo-hero {
  position: relative;
  min-height: 610px;
  overflow: hidden;
  background: #eaf0f4;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.sfgeo-hero-grid { position: relative; width: min(1320px, 100%); min-height: 610px; margin: auto; display: flex; align-items: center; }
.sfgeo-hero-copy { position: relative; z-index: 3; width: 58%; padding: 82px 50px 88px; }
.sfgeo-hero-grid::before {
  content: "";
  position: absolute;
  z-index: 2;
  inset: 0;
  background: linear-gradient(90deg, #eaf0f4 0%, #eaf0f4 48%, rgba(234, 240, 244, 0.78) 61%, rgba(234, 240, 244, 0.06) 82%);
  pointer-events: none;
}
.sfgeo-hero-media { position: absolute; z-index: 1; top: 0; right: 0; bottom: 0; width: 56%; margin: 0; background: #e2e9ee; }
.sfgeo-hero-media img { width: 100%; height: 100%; object-fit: contain; object-position: center; padding: 30px; }
.sfgeo-kicker { margin: 0; color: var(--red); font-size: 13px; line-height: 1.4; font-weight: 900; text-transform: uppercase; }
.sfgeo-cn .sfgeo-kicker { text-transform: none; }
.sfgeo-hero h1 { max-width: 780px; margin: 18px 0 24px; font-size: 58px; line-height: 1.05; font-weight: 950; }
.sfgeo-cn .sfgeo-hero h1 { font-size: 56px; }
.sfgeo-hero-lead { max-width: 690px; margin: 0; color: #465e72; font-size: 19px; line-height: 1.8; }
.sfgeo-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.sfgeo-button-secondary { background: transparent; color: var(--ink) !important; border-color: #8193a3; }
.sfgeo-button-secondary:hover { background: var(--navy); color: #ffffff !important; border-color: var(--navy); }

.sfgeo-section,
.sfgeo-gallery { padding: 88px max(20px, calc((100% - 1240px) / 2)); }
.sfgeo-section-head { max-width: 1240px; margin: 0 auto 34px; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.65fr); align-items: end; gap: 48px; }
.sfgeo-section-head h2,
.sfgeo-answer h2,
.sfgeo-split h2,
.sfgeo-case-split h2 { margin: 12px 0 0; font-size: 42px; line-height: 1.14; font-weight: 950; }
.sfgeo-section-head > p { margin: 0; color: var(--muted); font-size: 16px; }
.sfgeo-narrow { max-width: 930px; margin: auto; }
.sfgeo-answer { background: var(--navy); color: #ffffff; }
.sfgeo-answer h2 { color: #ffffff; }
.sfgeo-answer .sfgeo-narrow > p:last-child { margin: 22px 0 0; color: #d7e2eb; font-size: 20px; line-height: 1.85; }
.sfgeo-soft { background: var(--soft); }

.sfgeo-spec-grid { max-width: 1240px; margin: auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.sfgeo-spec-grid article { min-width: 0; padding: 23px 24px; background: #ffffff; border: 1px solid var(--line); border-radius: 6px; box-shadow: 0 10px 30px rgba(16,34,53,.05); }
.sfgeo-spec-grid span { display: block; margin-bottom: 9px; color: var(--red); font-size: 12px; font-weight: 900; }
.sfgeo-spec-grid strong { display: block; color: var(--ink); font-size: 16px; line-height: 1.55; }

.sfgeo-split { max-width: 1240px; margin: auto; display: grid; grid-template-columns: minmax(300px, .72fr) minmax(0, 1.28fr); gap: 64px; align-items: start; }
.sfgeo-check-list { margin: 30px 0 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.sfgeo-check-list li { position: relative; padding: 14px 18px 14px 42px; background: #f4f7f9; border-left: 3px solid var(--green); border-radius: 4px; font-weight: 800; }
.sfgeo-check-list li::before { content: "✓"; position: absolute; left: 17px; color: var(--green); }
.sfgeo-structure-grid { display: grid; gap: 14px; }
.sfgeo-structure-grid article { padding: 26px 28px; border: 1px solid var(--line); border-radius: 6px; box-shadow: var(--shadow); }
.sfgeo-structure-grid h3 { margin: 0 0 8px; font-size: 22px; }
.sfgeo-structure-grid p { margin: 0; color: var(--muted); }

.sfgeo-gallery { background: #f8fafb; }
.sfgeo-gallery-grid { max-width: 1240px; margin: auto; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.sfgeo-gallery-grid img { width: 100%; aspect-ratio: 4 / 3; object-fit: contain; padding: 16px; background: #e9eef2; border: 1px solid var(--line); border-radius: 6px; box-shadow: var(--shadow); }

.sfgeo-dark { background: var(--navy); color: #ffffff; }
.sfgeo-dark .sfgeo-section-head h2 { color: #ffffff; }
.sfgeo-process { max-width: 1240px; margin: auto; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 1px; background: rgba(255,255,255,.15); border: 1px solid rgba(255,255,255,.15); }
.sfgeo-process li { min-width: 0; min-height: 155px; padding: 25px 22px; background: #122b40; }
.sfgeo-process span { display: block; color: #f1665f; font-size: 13px; font-weight: 900; }
.sfgeo-process strong { display: block; margin-top: 14px; color: #ffffff; font-size: 16px; line-height: 1.55; }

.sfgeo-faq-list { max-width: 920px; margin: auto; display: grid; gap: 12px; }
.sfgeo-faq details { border: 1px solid var(--line); border-radius: 6px; background: #ffffff; box-shadow: 0 10px 28px rgba(16,34,53,.06); }
.sfgeo-faq summary { cursor: pointer; padding: 21px 56px 21px 23px; font-weight: 900; list-style: none; position: relative; }
.sfgeo-faq summary::-webkit-details-marker { display: none; }
.sfgeo-faq summary::after { content: "+"; position: absolute; right: 23px; top: 17px; font-size: 26px; color: var(--red); }
.sfgeo-faq details[open] summary::after { content: "−"; }
.sfgeo-faq details p { margin: 0; padding: 0 23px 23px; color: var(--muted); }

.sfgeo-related-grid { max-width: 1240px; margin: auto; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.sfgeo-related-grid a { min-width: 0; overflow: hidden; display: flex; flex-direction: column; background: #ffffff; border: 1px solid var(--line); border-radius: 6px; text-decoration: none; box-shadow: 0 12px 32px rgba(16,34,53,.07); transition: transform .2s, box-shadow .2s; }
.sfgeo-related-grid a:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.sfgeo-related-grid img { width: 100%; height: 210px; object-fit: contain; padding: 12px; background: #e9eef2; }
.sfgeo-related-grid span { padding: 18px 20px 21px; font-size: 18px; font-weight: 900; }
.sfgeo-hub-grid span { display: grid; gap: 9px; }
.sfgeo-hub-grid strong { font-size: 18px; line-height: 1.35; }
.sfgeo-hub-grid small { color: var(--muted); font-size: 14px; font-weight: 500; line-height: 1.65; }
.sfgeo-hub-topic { min-width: 0; display: block; padding: 23px 24px; background: #ffffff; border: 1px solid var(--line); border-radius: 6px; box-shadow: 0 10px 30px rgba(16,34,53,.05); text-decoration: none; transition: transform .2s, box-shadow .2s; }
.sfgeo-hub-topic:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.sfgeo-hub-topic span { display: block; margin-bottom: 9px; color: var(--red); font-size: 12px; font-weight: 900; }
.sfgeo-hub-topic strong { display: block; color: var(--ink); font-size: 16px; line-height: 1.55; }

.sfgeo-article-meta { min-height: 62px; display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 22px; padding: 14px 20px; background: #f7f9fb; color: #5d7183; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 700; }
.sfgeo-article-layout { max-width: 1160px; margin: auto; display: grid; grid-template-columns: minmax(0, 1fr) 330px; gap: 54px; align-items: start; }
.sfgeo-article-body section + section { margin-top: 54px; padding-top: 48px; border-top: 1px solid var(--line); }
.sfgeo-article-body h2 { margin: 0 0 20px; font-size: 34px; line-height: 1.2; }
.sfgeo-article-body p { margin: 0 0 18px; color: #425a6e; font-size: 17px; line-height: 1.85; }
.sfgeo-article-body ul { margin: 25px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.sfgeo-article-body li { min-width: 0; padding: 13px 15px 13px 35px; position: relative; background: var(--soft); border-radius: 4px; font-weight: 700; }
.sfgeo-article-body li::before { content: ""; position: absolute; left: 16px; top: 21px; width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.sfgeo-checklist { position: sticky; top: 104px; padding: 28px; background: var(--navy); color: #ffffff; border-radius: 6px; box-shadow: var(--shadow); }
.sfgeo-checklist h2 { margin: 12px 0 20px; font-size: 25px; line-height: 1.25; }
.sfgeo-checklist ol { margin: 0 0 25px; padding-left: 23px; }
.sfgeo-checklist li { margin: 0 0 13px; color: #d6e1ea; }
.sfgeo-checklist .sfgeo-button { width: 100%; }

.sfgeo-case-split { max-width: 1240px; margin: auto; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.sfgeo-case-split article { padding: 36px; border: 1px solid var(--line); border-radius: 6px; box-shadow: var(--shadow); }
.sfgeo-case-split p:last-child { color: var(--muted); font-size: 17px; line-height: 1.8; }

.sfgeo-cta { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; gap: 40px; padding: 66px max(20px, calc((100% - 1240px) / 2)); background: var(--navy-2); color: #ffffff; }
.sfgeo-cta h2 { margin: 0; color: #ffffff; font-size: 38px; line-height: 1.15; }
.sfgeo-cta p { max-width: 850px; margin: 14px 0 0; color: #d4e1ea; font-size: 17px; }

.sfgeo-footer { background: #0a1929; color: #ffffff; }
.sfgeo-footer-grid { width: min(1240px, calc(100% - 40px)); margin: auto; padding: 60px 0 48px; display: grid; grid-template-columns: 1.2fr .85fr 1.35fr .7fr; gap: 44px; }
.sfgeo-footer-name { display: block; font-size: 22px; font-weight: 950; }
.sfgeo-footer h2 { margin: 0 0 14px; font-size: 15px; color: #ffffff; }
.sfgeo-footer p { margin: 13px 0 0; color: #bdcad5; font-size: 14px; line-height: 1.8; }
.sfgeo-footer a { color: #dce6ee !important; text-decoration: none; border-bottom: 1px solid rgba(220,230,238,.32); }
.sfgeo-footer a:hover { color: #ffffff !important; border-color: var(--red); }
.sfgeo-footer-bottom { padding: 19px 20px; text-align: center; border-top: 1px solid rgba(255,255,255,.12); color: #879bad; font-size: 12px; }

.sfgeo-404 { min-height: 60vh; padding: 110px 20px; text-align: center; background: var(--soft); }
.sfgeo-404 > p { margin: 0; color: var(--red); font-size: 70px; font-weight: 950; }
.sfgeo-404 h1 { margin: 10px 0 30px; font-size: 38px; }

@media (max-width: 1120px) {
  .sfgeo-nav-wrap { gap: 14px; }
  .sfgeo-header nav { gap: 14px; }
  .sfgeo-header nav a { font-size: 12px; }
  .sfgeo-nav-cta { padding: 0 14px; }
  .sfgeo-hero h1,
  .sfgeo-cn .sfgeo-hero h1 { font-size: 48px; }
  .sfgeo-process { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sfgeo-footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 860px) {
  .sfgeo-nav-wrap { min-height: 70px; }
  .sfgeo-menu-button { display: block; margin-left: auto; }
  .sfgeo-nav-cta { min-height: 44px; }
  .sfgeo-header nav { position: absolute; top: 100%; left: 0; right: 0; display: none; align-items: stretch; flex-direction: column; gap: 0; padding: 10px 20px 18px; background: #ffffff; border-top: 1px solid var(--line); box-shadow: 0 20px 40px rgba(16,34,53,.14); }
  .sfgeo-cn .sfgeo-header nav { background: var(--navy); border-color: rgba(255,255,255,.14); }
  .sfgeo-header nav.is-open { display: flex; }
  .sfgeo-header nav a { min-height: 46px; display: flex; align-items: center; padding: 0 5px; border-bottom: 1px solid var(--line); font-size: 14px; }
  .sfgeo-cn .sfgeo-header nav a { border-color: rgba(255,255,255,.12); }
  .sfgeo-hero,
  .sfgeo-hero-grid { min-height: 560px; }
  .sfgeo-hero-copy { width: 72%; padding: 70px 30px; }
  .sfgeo-hero-grid::before { background: linear-gradient(90deg, #eaf0f4 0%, #eaf0f4 58%, rgba(234,240,244,.72) 75%, rgba(234,240,244,.18) 100%); }
  .sfgeo-hero-media { width: 62%; }
  .sfgeo-hero-media img { padding: 18px; }
  .sfgeo-section-head { grid-template-columns: 1fr; gap: 16px; }
  .sfgeo-spec-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sfgeo-split { grid-template-columns: 1fr; gap: 38px; }
  .sfgeo-related-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sfgeo-article-layout { grid-template-columns: 1fr; }
  .sfgeo-checklist { position: static; }
  .sfgeo-case-split { grid-template-columns: 1fr; }
  .sfgeo-cta { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .sfgeo-nav-wrap { width: min(100% - 24px, 1320px); }
  .sfgeo-brand-logo { width: 170px; max-width: 44vw; }
  .sfgeo-cn .sfgeo-brand-logo { width: 182px; }
  .sfgeo-nav-cta { padding: 0 10px; font-size: 12px; }
  .sfgeo-breadcrumb { width: calc(100% - 30px); min-height: 48px; }
  .sfgeo-hero,
  .sfgeo-hero-grid { min-height: 600px; }
  .sfgeo-hero-copy { width: 100%; padding: 270px 20px 46px; }
  .sfgeo-hero-grid::before { background: linear-gradient(180deg, rgba(234,240,244,.08) 0%, rgba(234,240,244,.68) 35%, #eaf0f4 52%, #eaf0f4 100%); }
  .sfgeo-hero-media { top: 0; left: 0; right: 0; width: 100%; height: 330px; }
  .sfgeo-hero-media img { padding: 12px; }
  .sfgeo-hero h1,
  .sfgeo-cn .sfgeo-hero h1 { margin-top: 12px; font-size: 37px; }
  .sfgeo-hero-lead { font-size: 16px; }
  .sfgeo-actions { display: grid; grid-template-columns: 1fr; }
  .sfgeo-button { width: 100%; }
  .sfgeo-section,
  .sfgeo-gallery { padding: 62px 20px; }
  .sfgeo-section-head h2,
  .sfgeo-answer h2,
  .sfgeo-split h2,
  .sfgeo-case-split h2 { font-size: 32px; }
  .sfgeo-answer .sfgeo-narrow > p:last-child { font-size: 17px; }
  .sfgeo-spec-grid,
  .sfgeo-gallery-grid,
  .sfgeo-related-grid { grid-template-columns: 1fr; }
  .sfgeo-process { grid-template-columns: 1fr; }
  .sfgeo-process li { min-height: 0; }
  .sfgeo-article-body h2 { font-size: 29px; }
  .sfgeo-article-body p { font-size: 16px; }
  .sfgeo-article-body ul { grid-template-columns: 1fr; }
  .sfgeo-case-split article { padding: 26px 22px; }
  .sfgeo-cta { padding: 50px 20px; }
  .sfgeo-cta h2 { font-size: 32px; }
  .sfgeo-footer-grid { grid-template-columns: 1fr; gap: 28px; padding: 48px 0 38px; }
}