:root {
  --ink: #111827;
  --muted: #5f6b85;
  --line: #e5e9f3;
  --surface: #ffffff;
  --blue: #2563eb;
  --indigo: #4f46e5;
  --violet: #7c3aed;
  color: var(--ink);
  background: #fff;
  font: 16px/1.7 system-ui, -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; overflow-x: hidden; background: #fff; }
a { color: inherit; }

.skip-link {
  position: fixed;
  left: 1rem;
  top: 0;
  z-index: 100;
  padding: .65rem 1rem;
  border-radius: .75rem;
  background: #fff;
  box-shadow: 0 12px 30px rgba(20, 31, 67, .18);
  transform: translateY(-140%);
}
.skip-link:focus-visible { transform: translateY(.75rem); }

.site-header {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 2rem;
  width: min(1200px, calc(100% - 48px));
  min-height: 80px;
  margin: auto;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  flex: 0 0 auto;
  color: var(--ink);
  font-size: 1.28rem;
  font-weight: 850;
  letter-spacing: -.04em;
  text-decoration: none;
}
.brand img { display: block; width: 40px; height: 40px; object-fit: contain; }
.site-header nav { display: flex; align-items: center; justify-content: center; gap: .25rem; flex: 1; }
.site-header nav a {
  padding: .55rem .72rem;
  border-radius: .65rem;
  color: #4a556f;
  font-size: .94rem;
  font-weight: 550;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease, background-color .2s ease;
}
.site-header nav a:hover,
.site-header nav a[aria-current="page"] { color: var(--indigo); background: #f0f2ff; }

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  padding: .66rem 1.15rem;
  border: 1px solid #d9def0;
  border-radius: .75rem;
  font-weight: 650;
  line-height: 1.2;
  text-decoration: none;
  white-space: nowrap;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-1px); border-color: #b8c1df; }
.header-login { background: rgba(255, 255, 255, .82); }
.primary {
  min-height: 52px;
  padding-inline: 1.5rem;
  border-color: transparent;
  color: #fff;
  background: linear-gradient(135deg, var(--blue), var(--violet));
  box-shadow: 0 14px 32px rgba(79, 70, 229, .24);
}
.primary:hover { border-color: transparent; box-shadow: 0 18px 38px rgba(79, 70, 229, .3); }

main { width: min(1200px, calc(100% - 48px)); margin: auto; }
.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(420px, .98fr);
  gap: clamp(3rem, 7vw, 7rem);
  align-items: center;
  min-height: 650px;
  padding: 72px 0 96px;
}
.hero::before {
  position: absolute;
  top: -160px;
  left: -260px;
  z-index: -1;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(37, 99, 235, .1), rgba(124, 58, 237, 0) 68%);
  content: "";
}
.hero-copy { min-width: 0; }
.eyebrow {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin: 0 0 1.25rem;
  color: var(--indigo);
  font-size: .92rem;
  font-weight: 750;
  letter-spacing: .08em;
}
.eyebrow > span { display: inline-block; width: 28px; height: 2px; border-radius: 2px; background: linear-gradient(90deg, var(--blue), var(--violet)); }
.hero h1 {
  max-width: 9em;
  margin: 0;
  color: #111827;
  font-size: clamp(3.5rem, 5vw, 5.35rem);
  font-weight: 850;
  letter-spacing: -.075em;
  line-height: 1.05;
  text-wrap: balance;
  word-break: keep-all;
}
.hero-intro { max-width: 38rem; margin: 1.75rem 0 0; color: var(--muted); font-size: 1.08rem; line-height: 1.85; }
.hero-actions { display: flex; align-items: center; gap: 1.5rem; margin-top: 2.25rem; }
.text-link { color: #35415e; font-weight: 650; text-decoration: none; }
.text-link span { display: inline-block; margin-left: .35rem; transition: transform .2s ease; }
.text-link:hover span { transform: translateX(4px); }

.hero-visual {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 500px;
  place-items: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .65);
  border-radius: 36px;
  background: linear-gradient(rgba(255, 255, 255, .7) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .7) 1px, transparent 1px), linear-gradient(145deg, #eefbff 0%, #edf1ff 45%, #f4eaff 100%);
  background-size: 38px 38px, 38px 38px, auto;
  box-shadow: 0 35px 80px rgba(63, 74, 135, .18);
}
.visual-glow { position: absolute; inset: 14% 10%; border-radius: 50%; background: radial-gradient(circle, rgba(78, 116, 255, .28), rgba(130, 70, 255, .08) 52%, transparent 72%); filter: blur(18px); }
.visual-mark {
  position: absolute;
  top: 36px;
  right: 38px;
  display: grid;
  width: 92px;
  height: 92px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, .8);
  border-radius: 26px;
  background: rgba(255, 255, 255, .76);
  box-shadow: 0 18px 35px rgba(79, 70, 229, .15);
  backdrop-filter: blur(14px);
  transform: rotate(5deg);
}
.visual-mark img { width: 72px; height: 72px; object-fit: contain; }
.workflow-card {
  position: relative;
  z-index: 1;
  width: min(390px, calc(100% - 64px));
  margin-top: 46px;
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, .86);
  border-radius: 24px;
  background: rgba(255, 255, 255, .86);
  box-shadow: 0 26px 70px rgba(43, 52, 101, .2);
  backdrop-filter: blur(18px);
}
.workflow-label { display: flex; justify-content: space-between; margin: 0 0 18px; color: #172033; font-size: .92rem; font-weight: 750; }
.workflow-label span { display: inline-flex; align-items: center; gap: .4rem; color: #16a36a; font-size: .78rem; }
.workflow-label span::before { width: 7px; height: 7px; border-radius: 50%; background: #21c783; box-shadow: 0 0 0 5px rgba(33, 199, 131, .11); content: ""; }
.workflow-card ol { display: grid; gap: 10px; margin: 0; padding: 0; list-style: none; }
.workflow-card li { display: flex; align-items: center; gap: 14px; padding: 13px 14px; border: 1px solid #e9ecf6; border-radius: 14px; background: rgba(255, 255, 255, .9); }
.workflow-card li b { display: grid; width: 36px; height: 36px; flex: 0 0 auto; place-items: center; border-radius: 11px; color: #4f46e5; background: #eef0ff; font-size: .75rem; }
.workflow-card li div { display: grid; line-height: 1.35; }
.workflow-card strong { font-size: .92rem; }
.workflow-card small { margin-top: 4px; color: #7a849b; font-size: .78rem; }
.workflow-note { display: flex; align-items: center; gap: .6rem; margin: 18px 2px 0; color: #667085; font-size: .78rem; }
.workflow-note i { width: 8px; height: 8px; border-radius: 50%; background: linear-gradient(135deg, #2ab7f6, #7c3aed); }

.section-heading { margin: 30px 0 42px; text-align: center; }
.section-heading p { margin: 0 0 .45rem; color: var(--indigo); font-size: .82rem; font-weight: 750; letter-spacing: .12em; }
.section-heading h2 { margin: 0; font-size: clamp(1.8rem, 3vw, 2.6rem); letter-spacing: -.045em; line-height: 1.25; }
.section-heading span { display: block; margin-top: .8rem; color: var(--muted); }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.card {
  position: relative;
  min-height: 220px;
  padding: 34px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--surface);
  box-shadow: 0 12px 34px rgba(28, 39, 78, .055);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.card:hover { transform: translateY(-3px); border-color: #cfd6ee; box-shadow: 0 22px 48px rgba(28, 39, 78, .09); }
.card::after { position: absolute; right: -50px; bottom: -70px; width: 170px; height: 170px; border-radius: 50%; background: radial-gradient(circle, rgba(91, 89, 238, .09), transparent 68%); content: ""; }
.card-number { color: #646cf2; font-size: .77rem; font-weight: 800; letter-spacing: .12em; }
.card h2 { margin: 1rem 0 .65rem; font-size: 1.34rem; letter-spacing: -.025em; line-height: 1.4; }
.card p { position: relative; z-index: 1; margin: 0; color: var(--muted); line-height: 1.85; }

.process { grid-column: 1 / -1; padding: 32px; border: 1px solid #e1e5fa; border-radius: 22px; background: linear-gradient(135deg, #f7f8ff, #f2f5ff); }
.process h2 { margin: 0 0 1rem; font-size: 1.4rem; }
.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .8rem 1.5rem; margin: 0; padding-left: 1.3rem; color: #4e5a75; }

.next {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  margin: 96px 0;
  padding: 42px 48px;
  overflow: hidden;
  border-radius: 26px;
  color: #fff;
  background: radial-gradient(circle at 82% 22%, rgba(115, 211, 255, .34), transparent 23%), radial-gradient(circle at 30% 130%, rgba(139, 92, 246, .5), transparent 40%), #151b3a;
  box-shadow: 0 24px 60px rgba(25, 34, 78, .18);
}
.next p { margin: 0 0 .35rem; color: #a9b7ff; font-size: .82rem; font-weight: 750; letter-spacing: .12em; }
.next h2 { margin: 0; font-size: clamp(1.6rem, 3vw, 2.35rem); letter-spacing: -.04em; }
.next div > span { display: block; margin-top: .65rem; color: #c8cee4; }
.next-button { border-color: rgba(255, 255, 255, .45); color: #171d3d; background: #fff; }

footer { border-top: 1px solid #e8ebf3; background: #fafbfe; }
.footer-inner { display: flex; align-items: center; gap: 2rem; width: min(1200px, calc(100% - 48px)); min-height: 110px; margin: auto; color: #7a8499; font-size: .9rem; }
.footer-brand { color: var(--ink); font-size: 1.08rem; font-weight: 800; text-decoration: none; }
.footer-links { display: flex; flex: 1; gap: 1.4rem; }
.footer-links a { color: #667085; text-decoration: none; }
.footer-links a:hover { color: var(--indigo); }

.article-page .hero { display: block; min-height: 0; max-width: 850px; padding: 88px 0 64px; }
.article-page .hero h1 { max-width: 12em; font-size: clamp(2.7rem, 5vw, 4.5rem); }
.article-page .hero-intro { max-width: 48rem; }
.article-page .hero-actions { display: none; }
.article-grid { grid-template-columns: minmax(0, 850px); }
.article-grid .process,
.article-grid .card { grid-column: 1; }
.article-grid .card { min-height: 0; }
.article-grid .card p { max-width: 72ch; }
.article-grid .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.updated { margin: 1.1rem 0 0; color: #7b8499; font-size: .9rem; }

a:focus-visible { outline: 3px solid #f59e0b; outline-offset: 3px; }

@media (max-width: 1020px) {
  .site-header { gap: 1rem; }
  .site-header nav a { padding-inline: .45rem; font-size: .87rem; }
  .hero { grid-template-columns: minmax(0, 1fr) minmax(360px, .85fr); gap: 3rem; }
  .hero h1 { font-size: clamp(3.2rem, 6vw, 4.55rem); }
}

@media (max-width: 820px) {
  .site-header { flex-wrap: wrap; width: min(100% - 32px, 1200px); padding: 14px 0; }
  .site-header nav { order: 3; flex: 0 0 100%; width: 100%; justify-content: flex-start; overflow-x: auto; scrollbar-width: none; }
  .site-header nav::-webkit-scrollbar { display: none; }
  .header-login { margin-left: auto; }
  main { width: min(100% - 32px, 1200px); }
  .hero { grid-template-columns: 1fr; gap: 3rem; min-height: 0; padding: 64px 0 80px; }
  .hero-copy { text-align: center; }
  .eyebrow,
  .hero-actions { justify-content: center; }
  .hero h1,
  .hero-intro { margin-inline: auto; }
  .hero-visual { min-height: 450px; }
  .section-heading { margin-top: 0; }
  .steps { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-wrap: wrap; gap: 1rem 2rem; width: min(100% - 32px, 1200px); padding: 28px 0; }
  .footer-links { order: 3; flex-basis: 100%; flex-wrap: wrap; }
}

@media (max-width: 580px) {
  .brand { font-size: 1.08rem; }
  .brand img { width: 36px; height: 36px; }
  .site-header nav { gap: .2rem; }
  .site-header nav a { padding: .45rem .55rem; }
  .hero { padding-top: 48px; }
  .hero h1 { max-width: 8em; font-size: clamp(2.6rem, 13vw, 3.6rem); letter-spacing: -.065em; }
  .hero-intro { font-size: 1rem; }
  .hero-actions { flex-direction: column; gap: 1rem; }
  .primary { width: 100%; }
  .hero-visual { min-height: 400px; border-radius: 26px; }
  .visual-mark { top: 22px; right: 22px; width: 72px; height: 72px; border-radius: 20px; }
  .visual-mark img { width: 56px; height: 56px; }
  .workflow-card { width: calc(100% - 32px); padding: 18px; }
  .grid { grid-template-columns: 1fr; }
  .card { min-height: 0; padding: 26px; }
  .steps,
  .article-grid .steps { grid-template-columns: 1fr; }
  .next { align-items: flex-start; flex-direction: column; margin: 64px 0; padding: 32px 26px; }
  .next-button { width: 100%; }
  .footer-links { gap: .7rem 1.2rem; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}