:root {
  --ink: #0d100f;
  --ink-soft: #161a18;
  --ash: #eef0eb;
  --paper: #fafbf7;
  --line-dark: #303631;
  --line-light: #d6dbd2;
  --muted: #687069;
  --mint: #2be0b5;
  --mint-ink: #073e32;
  --gold: #ffc15d;
  --white: #f7f8f4;
  --shell: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 78px; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }

.site-shell { width: min(calc(100% - 48px), var(--shell)); margin: 0 auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  height: 72px;
  color: var(--white);
  background: rgba(13, 16, 15, 0.98);
  border-bottom: 1px solid var(--line-dark);
}

.header-inner, .footer-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 24px; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: 0; white-space: nowrap; }
.brand img { display: block; }

.site-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; margin-right: 12px; color: #c3c9c0; font-size: 14px; }
.site-nav a { transition: color 160ms ease; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--white); }

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 750;
  line-height: 1.2;
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease;
}
.button:hover { transform: translateY(-2px); }
.button:focus-visible, summary:focus-visible, a:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
.button-small { min-height: 38px; padding: 8px 14px; color: var(--ink); background: var(--mint); }
.button-primary { color: var(--ink); background: var(--mint); }
.button-secondary { color: var(--white); background: transparent; border-color: #aab3a8; }
.button-secondary:hover { background: #202620; border-color: var(--white); }

.hero { position: relative; isolation: isolate; min-height: min(680px, calc(100svh - 144px)); overflow: hidden; color: var(--white); background: var(--ink); }
.hero-image { position: absolute; z-index: -3; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: 0.82; }
.hero-shade { position: absolute; z-index: -2; inset: 0; background: rgba(5, 8, 7, 0.66); }
.hero::before { content: ""; position: absolute; z-index: -1; inset: 22px; border: 1px solid rgba(247, 248, 244, 0.22); pointer-events: none; }
.hero-inner { min-height: inherit; display: flex; align-items: center; justify-content: space-between; gap: 56px; padding-top: 74px; padding-bottom: 64px; }
.hero-copy { max-width: 700px; }
.eyebrow, .section-kicker, .signal-label { margin: 0; color: var(--mint); font-size: 12px; font-weight: 800; letter-spacing: 1.2px; line-height: 1.4; }
.eyebrow { display: flex; align-items: center; gap: 10px; color: var(--white); }
.eyebrow span { width: 8px; height: 8px; background: var(--mint); border-radius: 50%; }
h1, h2, h3, p { margin-top: 0; }
h1 { max-width: 800px; margin: 19px 0 22px; font-size: clamp(42px, 6vw, 78px); font-weight: 820; letter-spacing: 0; line-height: 1.06; }
.hero-lead { max-width: 600px; margin-bottom: 30px; color: #e2e6df; font-size: 18px; line-height: 1.75; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.copy-status { min-height: 24px; margin: 12px 0 0; color: var(--mint); font-size: 13px; font-weight: 700; }

.hero-signal { width: 198px; align-self: flex-end; margin-bottom: 6px; padding: 18px 0; border-top: 1px solid rgba(247, 248, 244, 0.7); border-bottom: 1px solid rgba(247, 248, 244, 0.35); }
.signal-label { color: #d5dcd3; font-size: 10px; }
.signal-value { margin: 8px 0; font-size: 25px; font-weight: 850; letter-spacing: 0; }
.signal-line { width: 34px; height: 3px; margin: 12px 0; background: var(--gold); }
.signal-note { margin: 0; color: #d5dcd3; font-size: 13px; }

.proof-band { color: var(--white); background: var(--ink-soft); border-top: 1px solid var(--line-dark); border-bottom: 1px solid var(--line-dark); }
.proof-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.proof-grid > div { min-height: 128px; display: flex; flex-direction: column; justify-content: center; gap: 4px; padding: 24px 28px; border-right: 1px solid var(--line-dark); }
.proof-grid > div:first-child { border-left: 1px solid var(--line-dark); }
.proof-grid strong { color: var(--mint); font-size: 23px; font-weight: 850; line-height: 1; letter-spacing: 0; }
.proof-grid span { color: #c3c9c0; font-size: 14px; }

.section { padding: 112px 0; }
.section-ash { background: var(--ash); }
.split-heading { display: grid; grid-template-columns: minmax(140px, 1fr) minmax(0, 2.1fr); gap: 64px; }
.split-heading h2, .section-heading h2, .program h2, .faq-layout h2, .apply-inner h2 { margin-bottom: 19px; font-size: clamp(32px, 4vw, 52px); font-weight: 820; letter-spacing: 0; line-height: 1.15; }
.split-heading div > p { max-width: 715px; margin: 0; color: #3f4941; font-size: 18px; line-height: 1.8; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 50px; }
.section-heading h2 { margin: 12px 0 0; }
.section-summary { max-width: 365px; margin: 0; color: #4e5850; }

.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid #bfc7bc; border-left: 1px solid #bfc7bc; }
.service-item { min-height: 248px; display: flex; flex-direction: column; padding: 26px 28px; background: var(--ash); border-right: 1px solid #bfc7bc; border-bottom: 1px solid #bfc7bc; }
.service-item:hover { background: #e4e9df; }
.service-item-accent { background: var(--mint); }
.service-item-accent:hover { background: #1ad0a6; }
.service-number { margin-bottom: auto; color: #758076; font-family: "Courier New", monospace; font-size: 13px; font-weight: 700; }
.service-item h3, .benefit-item h3, .path-list h3 { margin: 0 0 8px; font-size: 21px; font-weight: 820; letter-spacing: 0; line-height: 1.25; }
.service-item p:last-child { margin: 0; color: #4e5850; font-size: 15px; }
.service-item-accent .service-number, .service-item-accent p { color: var(--mint-ink); }

.program { color: var(--white); background: var(--ink); }
.program-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(460px, 1.1fr); gap: 104px; }
.program h2 { margin: 12px 0 20px; }
.program-intro { max-width: 410px; margin: 0; color: #bac2b8; font-size: 17px; }
.benefit-list { border-top: 1px solid var(--line-dark); }
.benefit-item { display: grid; grid-template-columns: 44px 1fr; gap: 20px; padding: 27px 0; border-bottom: 1px solid var(--line-dark); }
.benefit-mark { width: 34px; height: 34px; display: inline-grid; place-items: center; color: var(--ink); background: var(--gold); border-radius: 50%; font-family: "Courier New", monospace; font-size: 13px; font-weight: 800; }
.benefit-item h3 { margin-bottom: 7px; color: var(--white); }
.benefit-item p { margin: 0; color: #bac2b8; }

.path-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin: 0; padding: 0; list-style: none; border-top: 1px solid #bfc7bc; }
.path-list li { min-height: 214px; padding: 28px 28px 26px 0; border-right: 1px solid #bfc7bc; border-bottom: 1px solid #bfc7bc; }
.path-list li + li { padding-left: 28px; }
.path-list li:last-child { border-right: 0; }
.path-list span { display: block; margin-bottom: 44px; color: #758076; font-family: "Courier New", monospace; font-size: 13px; font-weight: 700; }
.path-list p { margin: 0; color: #4e5850; }

.faq-layout { display: grid; grid-template-columns: minmax(220px, 0.75fr) minmax(0, 1.5fr); gap: 90px; }
.faq-layout h2 { margin-top: 12px; }
.faq-list { border-top: 1px solid var(--line-light); }
details { border-bottom: 1px solid var(--line-light); }
summary { position: relative; padding: 22px 42px 22px 0; font-size: 18px; font-weight: 780; line-height: 1.4; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
summary::after { position: absolute; top: 21px; right: 3px; color: var(--mint-ink); content: "+"; font-size: 26px; font-weight: 400; line-height: 1; }
details[open] summary::after { content: "-"; }
details p { max-width: 710px; margin: 0 0 22px; color: #4e5850; }

.apply-section { color: var(--white); background: #123f35; }
.apply-inner { min-height: 390px; display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(320px, 0.75fr); align-items: center; gap: 86px; padding-top: 72px; padding-bottom: 72px; }
.apply-inner .section-kicker { color: var(--gold); }
.apply-inner h2 { max-width: 720px; margin: 14px 0 0; }
.contact-block { padding-left: 34px; border-left: 1px solid rgba(247, 248, 244, 0.48); }
.contact-block > p:first-child { margin-bottom: 14px; color: #d4e2db; }
.wechat-id { margin-bottom: 18px; font-family: "Courier New", monospace; font-size: 25px; font-weight: 800; letter-spacing: 0; }
.contact-block .copy-status { color: var(--gold); }

.site-footer { height: 88px; color: #a6afa5; background: var(--ink); }
.site-footer .brand { color: var(--white); }
.site-footer p { margin: 0; font-size: 13px; }

@media (max-width: 820px) {
  .site-shell { width: min(calc(100% - 36px), var(--shell)); }
  .site-nav { display: none; }
  .header-inner { gap: 12px; }
  .header-inner .button { margin-left: auto; }
  .hero { min-height: 665px; }
  .hero::before { inset: 12px; }
  .hero-image { object-position: 63% center; }
  .hero-inner { align-items: flex-start; flex-direction: column; gap: 28px; padding-top: 58px; padding-bottom: 40px; }
  h1 { font-size: clamp(40px, 11vw, 60px); }
  .hero-lead { font-size: 16px; }
  .hero-signal { width: 100%; align-self: stretch; margin-top: auto; margin-bottom: 0; padding: 14px 0; }
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
  .proof-grid > div { min-height: 110px; padding: 20px; border-bottom: 1px solid var(--line-dark); }
  .proof-grid > div:nth-child(3) { border-left: 1px solid var(--line-dark); }
  .section { padding: 78px 0; }
  .split-heading, .program-layout, .faq-layout, .apply-inner { grid-template-columns: 1fr; gap: 28px; }
  .section-heading { display: block; margin-bottom: 35px; }
  .section-summary { margin-top: 18px; }
  .service-grid { grid-template-columns: repeat(2, 1fr); }
  .program-intro { max-width: 600px; }
  .path-list { grid-template-columns: 1fr; }
  .path-list li, .path-list li + li { min-height: auto; display: grid; grid-template-columns: 58px 1fr; gap: 0; padding: 22px 0; border-right: 0; }
  .path-list span { margin: 3px 0 0; }
  .faq-layout { gap: 12px; }
  .apply-inner { min-height: auto; gap: 28px; padding-top: 72px; padding-bottom: 72px; }
  .contact-block { padding: 26px 0 0; border-top: 1px solid rgba(247, 248, 244, 0.48); border-left: 0; }
  .site-footer { height: auto; padding: 28px 0; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 10px; }
}

@media (max-width: 520px) {
  .site-header { height: 64px; }
  .site-shell { width: min(calc(100% - 32px), var(--shell)); }
  .brand { gap: 8px; font-size: 15px; }
  .button-small { min-height: 36px; padding: 8px 11px; font-size: 13px; }
  .hero { min-height: 660px; }
  .hero-inner { padding-top: 48px; }
  .eyebrow { font-size: 10px; letter-spacing: 0.8px; }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .hero-actions .button { width: 100%; }
  .proof-grid > div { min-height: 98px; padding: 17px 12px; }
  .proof-grid strong { font-size: 20px; }
  .proof-grid span { font-size: 12px; }
  .split-heading div > p { font-size: 16px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-item { min-height: 204px; }
  .benefit-item { grid-template-columns: 38px 1fr; gap: 14px; }
  .benefit-mark { width: 30px; height: 30px; }
  .apply-inner h2, .split-heading h2, .section-heading h2, .program h2, .faq-layout h2 { font-size: 32px; }
}