.fl-site { font-family: Inter, Arial, "PingFang SC", "Microsoft YaHei", sans-serif; }
.fl-skip { position: fixed; left: 16px; top: -100px; z-index: 50; padding: 12px 18px; background: var(--dark); color: #fff; }
.fl-skip:focus { top: 12px; }
.fl-page [id] { scroll-margin-top: 100px; }
.fl-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding-top: 22px; }
.fl-back { font-size: 14px; color: var(--muted); text-decoration: none; }
.fl-back:hover { color: var(--accent); }
.fl-language { display: flex; padding: 3px; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
.fl-language a { padding: 6px 15px; border-radius: 4px; font-size: 14px; font-weight: 700; text-decoration: none; }
.fl-language a[aria-current="page"] { background: var(--accent); color: #fff; }
.fl-page .hero__inner { grid-template-columns: minmax(0,1.22fr) minmax(0,1fr); gap: 52px; padding: 46px 0 60px; }
.fl-page .hero__text { min-width: 0; }
.fl-page .hero h1 { font-size: clamp(36px,3.8vw,49px); line-height: 1.13; letter-spacing: -.025em; }
.fl-site:lang(zh-CN) .hero h1 { font-size: clamp(34px,3.7vw,47px); line-height: 1.35; letter-spacing: 0; }
.fl-page .hero h1 span { display: block; color: var(--accent); margin-top: 6px; }
.fl-lead { font-size: 21px; font-weight: 700; color: var(--dark); margin: 24px 0 14px; }
.fl-page .lede { font-size: 17px; line-height: 1.85; margin: 0; }
.fl-page .hero__actions { margin: 26px 0 18px; }
.fl-tags { display: flex; flex-wrap: wrap; gap: 8px 18px; list-style: none; padding: 0; margin: 0; font-size: 13px; color: var(--muted); }
.fl-tags li::before { content: ""; display: inline-block; width: 6px; height: 6px; margin-right: 7px; border-radius: 50%; background: var(--accent); vertical-align: middle; }
.fl-overview { margin: 0; padding: 28px; background: var(--dark); border-radius: var(--radius); color: #fff; box-shadow: 0 16px 36px rgba(10,40,45,.12); }
.fl-overview .eyebrow { color: #9bdfcf; }
.fl-overview h2 { font-size: 24px; line-height: 1.4; margin: 0 0 24px; }
.fl-mini-tracks { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; position: relative; padding-bottom: 25px; }
.fl-mini-track { padding: 17px 14px; border: 1px solid #497a72; border-top: 3px solid #72cdb8; background: #173c3d; border-radius: 6px; position: relative; }
.fl-mini-track--b { border-color: #536f97; border-top-color: #99bce9; background: #20374e; }
.fl-mini-track::after { content: ""; position: absolute; width: 1px; height: 26px; background: #789c99; left: 50%; bottom: -27px; }
.fl-mini-label { font-size: 11px; letter-spacing: .12em; font-weight: 800; color: #ace8d8; }
.fl-mini-track--b .fl-mini-label { color: #b8d2f4; }
.fl-mini-track h3 { font-size: 18px; line-height: 1.35; margin: 7px 0 10px; }
.fl-mini-track p { font-size: 13px; line-height: 1.7; color: #d5e5e5; margin: 0; }
.fl-common { position: relative; padding: 18px; text-align: center; border: 1px solid #698e88; border-radius: 6px; background: #1b4140; }
.fl-common strong { display: block; font-size: 16px; }
.fl-common p { margin: 4px 0 0; color: #d5e5e5; font-size: 13px; }
.fl-overview figcaption { border-top: 1px solid #345854; padding-top: 17px; margin-top: 20px; color: #c0d6d2; font-size: 13px; line-height: 1.7; }
.fl-page .anchor-nav { padding: 20px 0; }
.fl-page .section__header h2 { font-size: clamp(28px,3vw,38px); line-height: 1.3; max-width: 920px; }
.fl-page .section__lede { font-size: 17px; line-height: 1.8; }
.fl-page .card { box-shadow: 0 6px 20px rgba(10,40,45,.045); }
.fl-grid-3 { grid-template-columns: repeat(3,minmax(0,1fr)); }
.fl-grid-4 { grid-template-columns: repeat(4,minmax(0,1fr)); }
.fl-grid-2 { grid-template-columns: repeat(2,minmax(0,1fr)); }
.fl-scenario .fl-icon { width: 28px; height: 28px; display: block; margin-bottom: 18px; color: var(--accent); }
.fl-scenario h3 { font-size: 19px; line-height: 1.4; margin-bottom: 10px; }
.fl-scenario p { margin-bottom: 0; }
.fl-track { padding: 30px; border-top: 4px solid var(--accent); }
.fl-track--b { border-top-color: var(--accent-2); }
.fl-track--b .eyebrow { color: var(--accent-2); }
.fl-track h3 { font-size: 27px; line-height: 1.3; margin-bottom: 12px; }
.fl-track > p { margin-bottom: 22px; }
.fl-track ul { padding: 0; list-style: none; margin: 0; }
.fl-track li { padding: 14px 0; border-top: 1px solid var(--line); }
.fl-track li:last-child { padding-bottom: 0; }
.fl-track li strong { display: block; color: var(--dark); margin-bottom: 4px; }
.fl-track li span { display: block; font-size: 15px; color: var(--muted); line-height: 1.8; }
.fl-bridge { display: grid; grid-template-columns: auto 1fr; gap: 18px; align-items: start; margin-top: 22px; padding: 22px 25px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.fl-bridge > span { color: var(--accent); font-size: 30px; line-height: 1.3; }
.fl-bridge p { margin: 0; font-size: 15px; color: var(--muted); }
.fl-bridge strong { color: var(--dark); }
.fl-steps { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 24px; }
.fl-steps li { border-top: 2px solid var(--line); padding-top: 20px; }
.fl-number { display: block; color: var(--accent); font-size: 13px; font-weight: 800; letter-spacing: .08em; margin-bottom: 12px; }
.fl-steps h3 { font-size: 20px; line-height: 1.35; margin: 0 0 10px; }
.fl-steps p { color: var(--muted); margin: 0; font-size: 15px; }
.fl-package h3 { font-size: 21px; line-height: 1.35; margin-bottom: 14px; }
.fl-package p { font-size: 15px; }
.fl-package .fl-fit { color: var(--accent); font-weight: 700; font-size: 14px; }
.fl-package .fl-output { border-top: 1px solid var(--line); padding-top: 14px; margin-bottom: 0; }
.fl-deliverable { border-top: 3px solid var(--accent); }
.fl-deliverable h3 { font-size: 21px; line-height: 1.4; }
.fl-deliverable p:last-child { margin-bottom: 0; }
.fl-boundary h3 { font-size: 19px; line-height: 1.4; }
.fl-boundary p { font-size: 15px; margin-bottom: 0; }
.fl-responsibility { border-left: 3px solid var(--accent); padding-left: 18px; margin: 26px 0 0; color: var(--muted); font-size: 15px; }
.fl-responsibility a { color: var(--accent); }
.fl-page .faq-list { max-width: none; }
.fl-page .faq-list summary { line-height: 1.6; }
.fl-page .faq-list p { line-height: 1.85; }
.fl-source { font-size: 14px; }
.fl-source a { color: var(--accent); text-underline-offset: 3px; }
.fl-page .cta__body { padding: 36px; }
.fl-page .cta__body h2 { font-size: 28px; line-height: 1.4; margin: 0 0 10px; }
.fl-page .cta__body .eyebrow { color: #9bdfcf; }
.fl-page .cta__body p { max-width: 700px; }
.fl-contact-note { font-size: 13px; margin-bottom: 0; }
.fl-contact-links { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 20px; }
.fl-contact-links > a:not(.btn) { color: #e1f5f0; text-underline-offset: 4px; overflow-wrap: anywhere; }
.fl-related { font-size: 14px; margin-top: 24px; color: var(--muted); }
.fl-related a { color: var(--accent); text-underline-offset: 3px; }
@media (max-width: 1000px) {
  .fl-page .hero__inner { gap: 30px; grid-template-columns: minmax(0,1.15fr) minmax(0,1fr); }
  .fl-page .hero h1 { font-size: 40px; }
  .fl-overview { padding: 24px; }
  .fl-grid-4 { grid-template-columns: repeat(2,minmax(0,1fr)); }
}
@media (max-width: 780px) {
  .fl-page .hero__inner { grid-template-columns: 1fr; padding: 34px 0 40px; gap: 32px; }
  .fl-page [id] { scroll-margin-top: 166px; }
  .fl-page .hero h1 { font-size: 39px; }
  .fl-site:lang(zh-CN) .hero h1 { font-size: 38px; }
  .fl-page .section { padding: 46px 0; }
  .fl-grid-3 { grid-template-columns: 1fr; }
  .fl-steps { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .fl-track { padding: 24px; }
  .fl-track h3 { font-size: 24px; }
  .fl-site .nav__list { gap: 10px 16px; }
  .fl-site .header__inner { gap: 12px; }
}
@media (max-width: 560px) {
  .fl-grid-2, .fl-grid-4 { grid-template-columns: 1fr; }
  .fl-toolbar { gap: 10px; }
  .fl-language a { padding: 6px 12px; }
  .fl-page .hero h1 { font-size: 35px; }
  .fl-site:lang(zh-CN) .hero h1 { font-size: 33px; }
  .fl-lead { font-size: 19px; }
  .fl-page .hero__actions .btn { flex: 1 1 auto; }
  .fl-overview { padding: 22px 18px; }
  .fl-overview h2 { font-size: 23px; }
  .fl-mini-tracks { gap: 10px; }
  .fl-mini-track { padding: 15px 11px; }
  .fl-mini-track h3 { font-size: 17px; }
  .fl-bridge { padding: 20px; gap: 12px; }
  .fl-page .cta__body { padding: 25px; }
  .fl-page .cta__body h2 { font-size: 25px; }
}
@media (max-width: 359px) {
  .fl-site .brand__title { font-size: 14px; }
  .fl-page .hero h1, .fl-site:lang(zh-CN) .hero h1 { font-size: 29px; }
  .fl-steps { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) { .fl-site { scroll-behavior: auto; } html:has(.fl-site) { scroll-behavior: auto; } }