:root {
  --ink: #062b43;
  --muted: #647c8c;
  --line: #d4e2e7;
  --paper: #ffffff;
  --soft: #f2f8f9;
  --accent: #18d3c1;
  --accent-dark: #008f84;
  --deep: #08384c;
  --deep-2: #052c3d;
  --max: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: #edf5f7;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  padding: 0 max(26px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; width: max-content; font-size: 18px; }
.brand span { display: grid; width: 38px; height: 38px; place-items: center; border-radius: 11px; background: var(--accent); color: var(--ink); font-weight: 900; }
.top-nav { display: flex; gap: 34px; color: #61798a; font-size: 14px; }
.top-nav a:hover { color: var(--accent-dark); }
.back-link { justify-self: end; border: 1px solid var(--line); border-radius: 9px; padding: 10px 15px; background: #fff; font-size: 13px; font-weight: 800; }

main { width: min(calc(100% - 52px), var(--max)); margin: 0 auto; padding: 26px 0 34px; }
.package-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(360px, .92fr);
  gap: 46px;
  overflow: hidden;
  border-radius: 26px;
  padding: 54px;
  background: linear-gradient(135deg, var(--deep-2), #0a4a5c);
  box-shadow: 0 24px 65px rgba(24,71,86,.18);
  color: #fff;
}
.eyebrow { margin: 0 0 12px; color: var(--accent-dark); font-size: 12px; font-weight: 900; letter-spacing: .08em; }
.package-hero .eyebrow { color: #54f1e2; }
.hero-copy h1 { margin: 0; font-size: clamp(46px, 5vw, 66px); line-height: 1.08; letter-spacing: -.05em; }
.hero-lead { max-width: 600px; margin: 20px 0 24px; color: #c0d7df; font-size: 16px; line-height: 1.8; }
.billing-tabs { display: inline-flex; gap: 4px; scroll-margin-top: 90px; padding: 4px; border: 1px solid rgba(255,255,255,.16); border-radius: 12px; background: rgba(2,30,42,.65); }
.billing-tab { min-height: 38px; border: 0; border-radius: 9px; padding: 0 18px; background: transparent; color: #a9c4ce; cursor: pointer; font-size: 14px; font-weight: 800; }
.billing-tab span { margin-left: 4px; color: #54f1e2; font-size: 10px; }
.billing-tab.is-active { background: var(--accent); color: var(--ink); }
.billing-tab.is-active span { color: var(--ink); }

.plan-card { margin-top: 14px; border: 1px solid rgba(255,255,255,.16); border-radius: 18px; padding: 24px; background: rgba(3,32,44,.72); }
.plan-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; }
.plan-heading p { margin: 0 0 5px; color: #8eb0bc; font-size: 12px; }
.plan-heading h2 { margin: 0; font-size: 24px; }
.plan-tag { border-radius: 99px; padding: 7px 11px; background: rgba(24,211,193,.14); color: #74f0e4; font-size: 11px; font-weight: 800; }
.price-row { display: flex; align-items: end; gap: 8px; margin: 18px 0 14px; }
.price-row strong { font-size: 43px; line-height: 1; }
.price-row span { padding-bottom: 4px; color: #b9cfd7; font-size: 14px; }
.plan-features { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 0; padding: 0; color: #d5e5ea; font-size: 13px; list-style: none; }
.plan-features li::before { margin-right: 7px; color: var(--accent); content: "✓"; }
.plan-actions { display: flex; gap: 10px; margin-top: 20px; }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; border-radius: 10px; padding: 0 20px; font-size: 13px; font-weight: 900; }
.button.primary { background: var(--accent); color: var(--ink); }
.button.secondary { border: 1px solid rgba(255,255,255,.25); color: #fff; }
.plan-note { margin: 13px 0 0; color: #88aab6; font-size: 11px; }

.hero-visual { position: relative; align-self: stretch; overflow: hidden; min-height: 520px; border: 1px solid rgba(255,255,255,.13); border-radius: 22px; background: #063143; }
.hero-visual img { width: 100%; height: 100%; object-fit: cover; object-position: center; opacity: .88; }
.visual-caption { position: absolute; right: 18px; bottom: 18px; left: 18px; display: flex; justify-content: space-between; gap: 16px; border: 1px solid rgba(255,255,255,.14); border-radius: 11px; padding: 15px 17px; background: rgba(2,31,43,.86); font-size: 12px; }
.visual-caption span { color: #8fb0bc; }

.park-free-section { scroll-margin-top: 92px; margin-top: 24px; border: 1px solid #a7dcd8; border-radius: 24px; padding: 38px 42px; background: linear-gradient(125deg, #e7fbf7, #fff 72%); }
.park-free-heading { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.park-free-heading h2 { margin: 0; font-size: clamp(30px, 3vw, 40px); line-height: 1.18; }
.park-free-heading p:not(.eyebrow) { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
.park-free-amount { display: grid; gap: 5px; min-width: 190px; border-radius: 16px; padding: 18px 22px; background: var(--deep); color: #fff; }
.park-free-amount strong { font-size: 38px; line-height: 1; }
.park-free-amount span { color: #b7d9dd; font-size: 12px; }
.park-free-limits { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 26px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.park-free-limits div { display: grid; gap: 4px; padding: 20px 22px; border-left: 1px solid var(--line); }
.park-free-limits div:first-child { border-left: 0; }
.park-free-limits strong { font-size: 23px; }
.park-free-limits span { color: var(--muted); font-size: 12px; }
.park-free-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 26px; }
.park-free-grid > div { border: 1px solid var(--line); border-radius: 14px; padding: 19px; background: #fff; }
.park-free-grid strong { font-size: 15px; }
.park-free-grid p { margin: 9px 0 0; color: var(--muted); font-size: 13px; line-height: 1.7; }
.park-free-footer { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 22px; }
.park-free-footer p { max-width: 690px; margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }
.park-free-footer .button { flex: none; }

.content-section,
.delivery-section,
.faq-section,
.consult-card { margin-top: 24px; border: 1px solid var(--line); border-radius: 24px; background: var(--paper); }
.content-section { padding: 42px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 32px; }
.section-heading h2,
.delivery-section h2,
.faq-section h2,
.consult-card h2 { margin: 0; font-size: clamp(30px, 3vw, 40px); line-height: 1.18; letter-spacing: -.04em; }
.section-heading > p { max-width: 410px; margin: 0 0 4px; color: var(--muted); font-size: 14px; line-height: 1.7; }
.benefit-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 28px; }
.benefit-grid article { min-height: 166px; border: 1px solid var(--line); border-radius: 16px; padding: 22px; background: var(--soft); }
.card-index { color: var(--accent-dark); font-size: 11px; font-weight: 900; }
.benefit-grid h3 { margin: 28px 0 8px; font-size: 19px; }
.benefit-grid p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.spec-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 14px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.spec-strip div { display: grid; gap: 4px; padding: 20px 24px; border-left: 1px solid var(--line); }
.spec-strip div:first-child { border-left: 0; }
.spec-strip strong { font-size: 21px; }
.spec-strip span { color: var(--muted); font-size: 12px; }

.delivery-section { display: grid; grid-template-columns: 1.45fr .55fr; gap: 16px; padding: 16px; }
.delivery-main { padding: 26px; }
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 26px; }
.steps article { min-height: 150px; border-top: 2px solid var(--accent); padding: 16px 12px 10px; background: var(--soft); }
.steps article > span { color: var(--accent-dark); font-size: 11px; font-weight: 900; }
.steps h3 { margin: 24px 0 7px; font-size: 17px; }
.steps p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.55; }
.support-card { border-radius: 18px; padding: 28px; background: var(--deep); color: #fff; }
.support-card .eyebrow { color: #55eadc; }
.support-card h2 { font-size: 25px; }
.support-card ul { display: grid; gap: 0; margin: 24px 0 0; padding: 0; list-style: none; }
.support-card li { display: grid; gap: 4px; border-top: 1px solid rgba(255,255,255,.13); padding: 15px 0; }
.support-card strong { font-size: 18px; }
.support-card span { color: #9bb8c3; font-size: 12px; }

.faq-section { display: grid; grid-template-columns: .7fr 1.3fr; gap: 44px; padding: 38px 42px; }
.faq-list { display: grid; gap: 9px; }
details { border: 1px solid var(--line); border-radius: 12px; background: var(--soft); }
summary { cursor: pointer; padding: 16px 18px; font-size: 14px; font-weight: 800; list-style: none; }
summary::after { float: right; color: var(--accent-dark); content: "+"; }
details[open] summary::after { content: "−"; }
details p { margin: 0; padding: 0 18px 16px; color: var(--muted); font-size: 13px; line-height: 1.65; }

.consult-card { display: flex; align-items: center; justify-content: space-between; gap: 30px; padding: 34px 42px; background: linear-gradient(110deg, #e8fbf8, #fff); }
.consult-card h2 { font-size: 30px; }
.consult-card p:not(.eyebrow) { margin: 9px 0 0; color: var(--muted); font-size: 13px; }
.consult-card .button { min-width: 150px; }
footer { padding: 18px 24px 28px; color: #7b909b; text-align: center; font-size: 12px; }

a:focus-visible,
button:focus-visible,
summary:focus-visible { outline: 3px solid rgba(24,211,193,.45); outline-offset: 3px; }

@media (max-width: 960px) {
  .site-header { grid-template-columns: 1fr auto; }
  .top-nav { display: none; }
  main { width: min(calc(100% - 30px), var(--max)); }
  .package-hero { grid-template-columns: 1fr; padding: 36px; }
  .hero-visual { min-height: 360px; }
  .benefit-grid,
  .steps { grid-template-columns: repeat(2, 1fr); }
  .delivery-section,
  .faq-section { grid-template-columns: 1fr; }
  .park-free-grid { grid-template-columns: 1fr; }
  .park-free-limits { grid-template-columns: repeat(2, 1fr); }
  .park-free-limits div:nth-child(3) { border-top: 1px solid var(--line); border-left: 0; }
  .park-free-limits div:nth-child(4) { border-top: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .site-header { min-height: 64px; padding: 0 15px; }
  .brand strong { font-size: 16px; }
  .back-link { padding: 9px 11px; }
  main { padding-top: 15px; }
  .package-hero { gap: 24px; border-radius: 18px; padding: 26px 20px; }
  .hero-copy h1 { font-size: 42px; }
  .billing-tabs { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); width: 100%; }
  .billing-tab { padding-inline: 4px; font-size: 12px; }
  .plan-card { padding: 19px; }
  .plan-heading { align-items: start; }
  .price-row strong { font-size: 36px; }
  .plan-features { display: grid; }
  .plan-actions { display: grid; grid-template-columns: 1fr; }
  .hero-visual { min-height: 290px; }
  .park-free-section { padding: 28px 20px; }
  .park-free-heading,
  .park-free-footer { display: grid; }
  .park-free-amount { min-width: 0; }
  .park-free-limits { grid-template-columns: 1fr; }
  .park-free-limits div { border-top: 1px solid var(--line); border-left: 0; }
  .park-free-limits div:first-child { border-top: 0; }
  .park-free-footer .button { width: 100%; }
  .visual-caption { display: grid; }
  .content-section { padding: 28px 20px; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 12px; }
  .benefit-grid,
  .steps,
  .spec-strip { grid-template-columns: 1fr; }
  .benefit-grid article { min-height: 140px; }
  .spec-strip div { border-top: 1px solid var(--line); border-left: 0; }
  .spec-strip div:first-child { border-top: 0; }
  .delivery-section { padding: 10px; }
  .delivery-main { padding: 20px 10px; }
  .faq-section { gap: 22px; padding: 28px 20px; }
  .consult-card { display: grid; padding: 28px 22px; }
  .consult-card .button { width: 100%; }
}