:root {
  --ink: #111214;
  --ink-soft: #55585e;
  --paper: #f5f5f2;
  --white: #fff;
  --line: #dcdeda;
  --orange: #f45a16;
  --orange-dark: #bb3d08;
  --orange-soft: #fff0e7;
  --green: #167d52;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.7;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
}
a, button { font: inherit; letter-spacing: 0; }
a { color: inherit; }
:focus-visible { outline: 3px solid #0a72e8; outline-offset: 3px; }
.shell { width: min(calc(100% - 48px), var(--max)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 100; padding: 10px 14px; color: #fff; background: #111; text-decoration: none; }
.skip-link:focus { top: 12px; }

.header { position: sticky; top: 0; z-index: 40; height: 68px; border-bottom: 1px solid rgba(17,18,20,.08); background: rgba(255,255,255,.92); backdrop-filter: blur(18px); }
.header-inner { height: 100%; display: flex; align-items: center; gap: 28px; }
.brand { min-height: 44px; display: inline-flex; align-items: center; gap: 10px; font-weight: 820; text-decoration: none; white-space: nowrap; }
.brand-mark { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 7px; color: #fff; background: var(--orange-dark); font-size: 13px; box-shadow: 0 6px 16px rgba(244,90,22,.22); }
.brand-mark::before { content: "提"; }
.nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.nav a { min-height: 44px; display: inline-flex; align-items: center; padding: 0 13px; color: #45484d; text-decoration: none; font-size: 14px; font-weight: 680; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--orange-dark); }
.review-state { min-height: 36px; display: inline-flex; align-items: center; padding: 0 10px; border: 1px solid #d8dad6; border-radius: 6px; color: #676a70; background: #fafaf8; font-size: 12px; font-weight: 760; }

.hero { padding: 104px 0 88px; color: #fff; background: #0d0f12; }
.hero.orange { color: var(--ink); background: var(--orange-soft); }
.hero .shell { max-width: 960px; margin-left: max(24px, calc((100% - var(--max)) / 2)); }
.eyebrow { margin: 0 0 18px; color: #ff8c57; font-size: 14px; font-weight: 820; }
.hero.orange .eyebrow { color: var(--orange-dark); }
.hero h1 { max-width: 880px; margin: 0; font-size: 60px; line-height: 1.06; font-weight: 790; }
.hero p { max-width: 760px; margin: 26px 0 0; color: rgba(255,255,255,.67); font-size: 20px; line-height: 1.75; }
.hero.orange p { color: #575a60; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 0 20px; border: 1px solid transparent; border-radius: 7px; text-decoration: none; font-weight: 760; }
.button-primary { color: #fff; background: var(--orange-dark); }
.button-secondary { border-color: rgba(255,255,255,.35); color: #fff; background: rgba(255,255,255,.06); }
.hero.orange .button-secondary { border-color: #c8cbc7; color: var(--ink); background: rgba(255,255,255,.6); }

.summary-band { border-bottom: 1px solid var(--line); background: var(--paper); }
.summary-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.summary-item { min-height: 122px; padding: 24px; border-left: 1px solid var(--line); }
.summary-item:last-child { border-right: 1px solid var(--line); }
.summary-item span { display: block; color: #62656a; font-size: 13px; font-weight: 700; }
.summary-item strong { display: block; margin-top: 8px; font-size: 17px; line-height: 1.4; overflow-wrap: anywhere; }

.section { padding: 92px 0; }
.section.alt { background: var(--paper); }
.section-head { max-width: 760px; margin-bottom: 44px; }
.section-head small { color: var(--orange-dark); font-weight: 820; }
.section-head h2 { margin: 10px 0 0; font-size: 42px; line-height: 1.12; }
.section-head p { margin: 18px 0 0; color: var(--ink-soft); font-size: 18px; }

.steps { margin: 0; padding: 0; list-style: none; counter-reset: step; border-top: 1px solid var(--line); }
.steps li { display: grid; grid-template-columns: 58px 180px 1fr; gap: 18px; align-items: start; padding: 26px 0; border-bottom: 1px solid var(--line); counter-increment: step; }
.steps li::before { content: counter(step, decimal-leading-zero); width: 42px; height: 42px; display: grid; place-items: center; border-radius: 50%; color: #fff; background: var(--ink); font-size: 12px; font-weight: 800; }
.steps strong { font-size: 18px; }
.steps span { color: var(--ink-soft); }

.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.capability { min-height: 190px; padding: 28px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.capability b { color: var(--orange-dark); font-size: 13px; }
.capability h3 { margin: 36px 0 0; font-size: 23px; }
.capability p { margin: 10px 0 0; color: var(--ink-soft); }
.note { margin-top: 30px; padding: 20px 22px; border-left: 4px solid var(--orange); color: #4d5056; background: var(--orange-soft); }

.legal-layout { display: grid; grid-template-columns: 240px 1fr; gap: 70px; align-items: start; }
.toc { position: sticky; top: 96px; border-top: 1px solid var(--line); }
.toc a { min-height: 46px; display: flex; align-items: center; border-bottom: 1px solid var(--line); color: #686b71; text-decoration: none; font-size: 14px; }
.toc a:hover { color: var(--orange-dark); }
.legal-content { max-width: 760px; }
.legal-block { padding: 0 0 52px; margin: 0 0 48px; border-bottom: 1px solid var(--line); scroll-margin-top: 100px; }
.legal-block:last-child { margin-bottom: 0; border-bottom: 0; }
.legal-block h2 { margin: 0; font-size: 32px; line-height: 1.2; }
.legal-block h3 { margin: 28px 0 0; font-size: 20px; }
.legal-block p, .legal-block li { color: var(--ink-soft); }
.legal-block a { min-height: 44px; display: inline-flex; align-items: center; color: var(--orange-dark); font-weight: 700; }
.legal-block ul { padding-left: 22px; }
.legal-block li + li { margin-top: 10px; }
.effective { margin-top: 22px; color: #777a80; font-size: 14px; }

.closing { padding: 70px 0; color: #fff; background: #202329; }
.closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.closing h2 { margin: 0; font-size: 34px; }
.closing p { max-width: 640px; margin: 10px 0 0; color: rgba(255,255,255,.62); }

.footer { padding: 64px 0 24px; color: rgba(255,255,255,.68); background: #0c0d0f; }
.footer-grid { display: grid; grid-template-columns: 1.45fr repeat(3, .62fr); gap: 48px; }
.footer-brand { color: #fff; font-size: 23px; font-weight: 820; }
.footer-copy { max-width: 390px; margin: 10px 0 0; font-size: 13px; line-height: 1.75; }
.footer-contact { min-height: 44px; display: inline-flex; align-items: center; margin-top: 18px; color: #fff; font-size: 14px; font-weight: 720; text-decoration: none; }
.footer-col { display: grid; align-content: start; gap: 2px; }
.footer-col strong { min-height: 36px; color: #fff; font-size: 13px; }
.footer-col a { min-width: 44px; min-height: 44px; display: inline-flex; align-items: center; color: rgba(255,255,255,.66); font-size: 13px; text-decoration: none; }
.footer-col a:hover, .footer-contact:hover { color: #fff; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-top: 44px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.13); font-size: 12px; }
.footer-status { color: rgba(255,255,255,.48); }

@media (max-width: 860px) {
  .nav { display: none; }
  .review-state { margin-left: auto; }
  .hero { padding: 84px 0 72px; }
  .hero h1 { font-size: 48px; }
  .summary-grid { grid-template-columns: repeat(2, 1fr); }
  .summary-item:nth-child(2) { border-right: 1px solid var(--line); }
  .summary-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .legal-layout { grid-template-columns: 1fr; gap: 40px; }
  .toc { position: static; display: grid; grid-template-columns: repeat(2, 1fr); border-left: 1px solid var(--line); }
  .toc a { padding: 0 14px; border-right: 1px solid var(--line); }
  .closing-inner { align-items: flex-start; flex-direction: column; }
}

@media (max-width: 620px) {
  body { font-size: 16px; }
  .shell { width: min(calc(100% - 32px), var(--max)); }
  .header { height: 60px; }
  .brand-mark { width: 30px; height: 30px; }
  .review-state { font-size: 11px; }
  .hero { padding: 70px 0 60px; }
  .hero .shell { margin: 0 auto; }
  .hero h1 { font-size: 34px; }
  .hero p { font-size: 17px; }
  .hero-actions { display: grid; }
  .button { width: 100%; }
  .summary-grid { grid-template-columns: 1fr; }
  .summary-item, .summary-item:nth-child(2), .summary-item:last-child { min-height: 96px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .section { padding: 72px 0; }
  .section-head h2 { font-size: 34px; }
  .section-head p { font-size: 16px; }
  .steps li { grid-template-columns: 48px 1fr; gap: 12px; }
  .steps span { grid-column: 2; }
  .capability-grid { grid-template-columns: 1fr; }
  .capability { min-height: 170px; padding: 24px; }
  .toc { grid-template-columns: 1fr; }
  .legal-block h2 { font-size: 28px; }
  .closing h2 { font-size: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 38px 24px; }
  .footer-about { grid-column: 1 / -1; }
  .footer-bottom { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (max-width: 380px) {
  .hero h1 { font-size: 32px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-about { grid-column: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}