:root {
  color-scheme: light dark;
  --page: #f9fbf9;
  --surface: #f0f4f0;
  --panel: #e5eee7;
  --ink: #21362d;
  --muted: #53645a;
  --accent: #185b46;
  --button-ink: #f9fbf9;
  --line: #d4ded6;
  --radius: 12px;
  --header-layer: 10;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 94px; }
body { margin: 0; background: var(--page); color: var(--ink); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.8; -webkit-font-smoothing: antialiased; }
::selection { color: var(--button-ink); background: var(--accent); }
a { color: inherit; text-decoration: none; text-underline-offset: 5px; }
a:hover { color: var(--accent); }
a:focus-visible, summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 6px; border-radius: 3px; }
img { display: block; width: 100%; max-width: 100%; object-fit: cover; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-weight: 650; }
.container-xl { max-width: 1240px; padding-inline: 36px; }
.skip-link { position: fixed; top: -100px; left: 20px; z-index: 20; padding: 10px 18px; background: var(--ink); color: var(--page); border-radius: var(--radius); }
.skip-link:focus { top: 10px; }
.site-header { border-bottom: 1px solid var(--line); background: var(--page); }
.header-inner { display: flex; height: 80px; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; font-size: 24px; letter-spacing: -.7px; line-height: 1; font-weight: 750; color: var(--ink); }
.brand-mark { display: grid; place-items: center; width: 34px; height: 34px; border-radius: 8px; background: var(--accent); color: var(--button-ink); font-size: 25px; font-weight: 800; }
.brand-accent { color: var(--accent); }
.desktop-nav { display: flex; align-items: center; gap: 30px; font-size: 14px; font-weight: 550; }
.desktop-nav a:hover, .site-footer a:hover { text-decoration: underline; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 24px; min-height: 52px; padding: 12px 24px; border: 1px solid var(--accent); border-radius: var(--radius); background: var(--accent); color: var(--button-ink); font-size: 15px; font-weight: 600; line-height: 1.5; white-space: nowrap; transition: transform .18s ease, opacity .18s ease; }
.button:hover { color: var(--button-ink); opacity: .88; transform: translateY(-2px); }
.button:active { transform: scale(.98); }
.button-small { min-height: 40px; padding: 8px 17px; gap: 17px; font-size: 13px; }
.hero { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 70px; padding-block: 60px 50px; }
.hero-category { color: var(--accent); font-size: 14px; font-weight: 600; margin-bottom: 25px; }
h1 { font-size: clamp(36px, 4.25vw, 58px); line-height: 1.32; letter-spacing: -2px; }
h1 span { display: block; white-space: nowrap; }
.hero-description { max-width: 34em; margin-top: 24px; color: var(--muted); font-size: 17px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 25px; margin-top: 34px; }
.text-link { display: inline-flex; align-items: center; gap: 10px; font-size: 14px; font-weight: 600; color: var(--accent); }
.text-link:hover { text-decoration: underline; }
.hero-visual img { height: 430px; border-radius: var(--radius); background: var(--panel); object-position: 45% center; }
.hero-visual figcaption { margin-top: 13px; color: var(--muted); font-size: 12px; }
.status-note { background: var(--surface); border-block: 1px solid var(--line); }
.status-inner { display: flex; align-items: center; gap: 24px; padding-block: 19px; font-size: 12px; line-height: 1.8; }
.status-inner strong { flex-shrink: 0; font-size: 12px; }
.status-inner p { flex: 1; color: var(--muted); }
.status-inner a { flex-shrink: 0; color: var(--accent); font-weight: 600; }
.section-space { padding-block: 92px; }
.section-heading { max-width: 700px; margin-bottom: 36px; }
h2 { font-size: clamp(28px, 3vw, 38px); line-height: 1.45; letter-spacing: -.8px; }
.section-heading > p { margin-top: 15px; color: var(--muted); font-size: 15px; }
.solution-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 42px; }
.solution-primary { display: flex; flex-direction: column; align-items: flex-start; padding: 38px 42px; border-radius: var(--radius); background: var(--panel); }
.topic-label { font-size: 13px; font-weight: 600; color: var(--accent); }
.solution-primary h3 { font-size: 31px; line-height: 1.5; margin-top: 22px; letter-spacing: -.5px; }
.solution-primary p { margin-top: 20px; color: var(--muted); font-size: 14px; max-width: 29em; }
.solution-primary .text-link { margin-top: 28px; }
.solution-secondary { display: flex; flex-direction: column; justify-content: center; gap: 30px; }
.solution-secondary article { padding: 12px 4px 28px; border-bottom: 1px solid var(--line); }
.solution-secondary article:last-child { padding-bottom: 12px; border: 0; }
.solution-secondary h3 { margin-top: 12px; font-size: 23px; line-height: 1.5; }
.solution-secondary p { margin-top: 14px; color: var(--muted); font-size: 14px; max-width: 36em; }
.scenario-section { background: var(--surface); padding-block: 70px; }
.scenario-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 74px; align-items: center; }
.scenario-photo img { height: 440px; border-radius: var(--radius); background: var(--panel); }
.scenario-copy > p { margin-top: 20px; max-width: 32em; color: var(--muted); font-size: 14px; }
.scenario-list { margin: 28px 0 0; }
.scenario-list div { display: grid; grid-template-columns: 80px 1fr; gap: 15px; margin-top: 20px; }
.scenario-list dt { font-size: 14px; font-weight: 600; }
.scenario-list dd { margin: 0; font-size: 13px; color: var(--muted); }
.workflow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; list-style: none; padding: 0; margin: 46px 0 0; }
.workflow-grid li { border-top: 1px solid var(--line); padding-top: 22px; }
.step-number { display: inline-flex; align-items: center; justify-content: center; height: 32px; width: 32px; background: var(--panel); border-radius: 8px; color: var(--accent); font-size: 14px; font-weight: 650; }
.workflow-grid h3 { margin-top: 19px; font-size: 18px; line-height: 1.5; }
.workflow-grid p { color: var(--muted); margin-top: 12px; font-size: 13px; line-height: 1.9; }
.faq-section { padding-block: 72px; border-top: 1px solid var(--line); background: var(--surface); }
.faq-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 80px; }
.faq-grid .section-heading { margin: 0; }
.faq-grid .text-link { margin-top: 22px; }
.faq-list details { border-bottom: 1px solid var(--line); padding-block: 18px; }
.faq-list details:first-child { padding-top: 0; }
.faq-list summary { cursor: pointer; list-style: none; position: relative; padding-right: 28px; font-size: 15px; font-weight: 600; line-height: 1.7; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 1px; top: -1px; font-size: 22px; font-weight: 400; color: var(--accent); }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 45em; padding-right: 20px; margin-top: 13px; font-size: 13px; color: var(--muted); line-height: 1.95; }
.closing { display: flex; align-items: center; justify-content: space-between; gap: 40px; padding-block: 76px; }
.closing h2 { font-size: 34px; }
.closing p { font-size: 14px; color: var(--muted); margin-bottom: 20px; }
.site-footer { padding-block: 34px 24px; border-top: 1px solid var(--line); }
.footer-top { display: flex; align-items: center; gap: 30px; padding-bottom: 28px; }
.footer-top > p { color: var(--muted); font-size: 13px; }
.footer-top nav { margin-left: auto; display: flex; gap: 24px; color: var(--muted); font-size: 13px; }
.footer-bottom { display: flex; flex-wrap: wrap; gap: 12px 24px; color: var(--muted); font-size: 11px; }
.document { max-width: 850px; padding-block: 64px 80px; }
.document h1 { font-size: 39px; white-space: normal; letter-spacing: -1px; }
.document .document-intro { margin-top: 20px; color: var(--muted); }
.document .document-note { margin-top: 24px; padding: 20px 24px; border-radius: var(--radius); background: var(--panel); font-size: 14px; }
.document section { margin-top: 38px; scroll-margin-top: 30px; }
.document h2 { font-size: 23px; margin-bottom: 14px; }
.document p, .document li { color: var(--muted); font-size: 15px; }
.document ul { padding-left: 23px; margin-top: 15px; }
.document li + li { margin-top: 10px; }
.document a:not(.button) { color: var(--accent); text-decoration: underline; }
.document-back { display: inline-flex; margin-bottom: 32px; font-size: 14px; }
@media (prefers-color-scheme: dark) {
  :root { --page: #141e19; --surface: #1b2821; --panel: #263b30; --ink: #e9f0e9; --muted: #b6c5ba; --accent: #a2d6b4; --button-ink: #17291e; --line: #394b3f; }
  .hero-visual img, .scenario-photo img { filter: brightness(.84); }
}
@media (min-width: 1400px) { .hero { padding-block: 76px 62px; } .hero-visual img { height: 460px; } }
@media (max-width: 1023px) {
  .container-xl { padding-inline: 28px; }
  .hero { gap: 30px; padding-block: 45px; }
  h1 { font-size: 40px; }
  .hero-category { font-size: 12px; }
  .hero-description { font-size: 15px; }
  .hero-actions { gap: 18px; }
  .hero-visual img { height: 370px; }
  .desktop-nav { gap: 20px; }
  .solution-grid { gap: 28px; }
  .solution-primary { padding: 30px; }
  .scenario-grid { gap: 35px; }
  .scenario-photo img { height: 420px; }
  .workflow-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .faq-grid { gap: 42px; }
}
@media (max-width: 767px) {
  html { scroll-padding-top: 30px; }
  .container-xl { padding-inline: 22px; }
  .header-inner { height: 70px; gap: 14px; }
  .brand { font-size: 21px; gap: 8px; }
  .brand-mark { width: 30px; height: 30px; font-size: 22px; }
  .desktop-nav { display: none; }
  .button-small { padding: 8px 12px; gap: 10px; }
  .hero { grid-template-columns: 1fr; gap: 35px; padding-block: 38px 30px; }
  .hero-category { margin-bottom: 18px; font-size: 12px; }
  h1 { font-size: clamp(32px, 8.2vw, 48px); letter-spacing: -1px; }
  .hero-description { margin-top: 20px; font-size: 15px; }
  .hero-actions { margin-top: 25px; gap: 23px; }
  .button { min-height: 48px; padding: 11px 18px; font-size: 14px; gap: 18px; }
  .button-small { min-height: 38px; padding: 8px 12px; font-size: 12px; gap: 10px; }
  .text-link { font-size: 13px; }
  .hero-visual img { height: 290px; object-position: center 48%; }
  .hero-visual figcaption { font-size: 11px; }
  .status-inner { flex-wrap: wrap; gap: 7px 14px; padding-block: 18px; }
  .status-inner strong { flex-basis: 100%; }
  .status-inner p { flex-basis: 100%; }
  .status-inner a { margin-top: 3px; }
  .section-space { padding-block: 54px; }
  .section-heading { margin-bottom: 28px; }
  h2 { font-size: 28px; }
  .section-heading > p { font-size: 14px; }
  .solution-grid { grid-template-columns: 1fr; gap: 26px; }
  .solution-primary { padding: 28px; }
  .solution-primary h3 { font-size: 28px; margin-top: 17px; }
  .solution-secondary { gap: 16px; }
  .solution-secondary article { padding: 8px 0 24px; }
  .solution-secondary h3 { font-size: 21px; }
  .scenario-section { padding-block: 48px; }
  .scenario-grid { grid-template-columns: 1fr; gap: 30px; }
  .scenario-photo img { height: 270px; }
  .scenario-list div { grid-template-columns: 75px 1fr; gap: 10px; }
  .workflow-grid { grid-template-columns: 1fr; gap: 25px; margin-top: 30px; }
  .workflow-grid li { display: grid; grid-template-columns: 34px 1fr; column-gap: 16px; padding-top: 20px; }
  .workflow-grid h3 { margin-top: 2px; }
  .workflow-grid p { grid-column: 2; margin-top: 7px; }
  .faq-section { padding-block: 48px; }
  .faq-grid { grid-template-columns: 1fr; gap: 30px; }
  .closing { display: grid; grid-template-columns: 1fr; gap: 24px; padding-block: 50px; }
  .closing h2 { font-size: 28px; }
  .footer-top { flex-wrap: wrap; gap: 18px; padding-bottom: 24px; }
  .footer-top > p { margin-left: auto; font-size: 11px; }
  .footer-top nav { margin-left: 0; flex-basis: 100%; }
  .footer-bottom { flex-direction: column; gap: 8px; }
  .document { padding-block: 35px 55px; }
  .document h1 { font-size: 31px; }
  .document h2 { font-size: 22px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { transition: none !important; } }