:root {
  --navy: #071b2c;
  --navy-soft: #17374c;
  --gold: #a36108;
  --gold-hover: #754404;
  --paper: #f6f8f5;
  --text: #132938;
  --muted: #60727e;
  --muted-soft: #7b8b94;
  --line: #d7e0e3;
  --focus: #176b92;
  --font-display: "Microsoft YaHei UI", "PingFang SC", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  --font-body: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  --font-label: "Segoe UI", "Microsoft YaHei UI", Arial, sans-serif;
  color: var(--text);
  background: var(--paper);
  font-family: var(--font-body);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  background: radial-gradient(circle at 8% 10%, rgba(255,255,255,.9), transparent 34rem), linear-gradient(180deg, #f8faf7 0%, var(--paper) 100%);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
a:focus-visible, summary:focus-visible { outline: 3px solid rgba(23,107,146,.3); outline-offset: 4px; border-radius: 4px; }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: 10px 14px;
  border-radius: 6px;
  color: #fff;
  background: var(--navy);
  font-size: 14px;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform .2s ease;
}

.skip-link:focus { transform: translateY(0); }

.page-noise {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  opacity: .018;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.section-wrap { width: min(1160px, calc(100% - 64px)); margin-inline: auto; }

.seo-article, .faq-section {
  display: grid;
  grid-template-columns: minmax(310px, .86fr) minmax(0, 1.14fr);
  gap: clamp(64px, 9vw, 132px);
  align-items: start;
}

.seo-article { min-height: 58vh; padding-block: clamp(96px, 12vh, 144px) clamp(88px, 11vh, 132px); }
.faq-section { min-height: 42vh; padding-block: clamp(70px, 8vh, 96px) clamp(90px, 11vh, 130px); border-top: 1px solid var(--line); }

.eyebrow {
  margin: 0 0 22px;
  color: var(--gold);
  font-family: var(--font-label);
  font-size: 11px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: .16em;
}

h1, h2 {
  margin: 0;
  max-width: 11em;
  color: var(--navy);
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -.035em;
  text-wrap: balance;
}

h1 { font-size: clamp(42px, 4.55vw, 64px); line-height: 1.12; }
h2 { font-size: clamp(36px, 3.7vw, 52px); line-height: 1.14; }
h1 em, h2 em { color: var(--gold); font-style: normal; }

.cartoon-visual {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

.cartoon-product {
  max-width: 500px;
  margin: 44px 0 0 -8px;
}

.cartoon-faq {
  max-width: 320px;
  margin: 38px 0 0 4px;
}

.seo-copy { max-width: 680px; }
.seo-copy > p { margin: 0 0 18px; color: var(--muted); font-size: 16px; line-height: 1.9; }
.seo-copy strong { color: var(--navy); font-weight: 700; }

.inline-contact {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 44px;
  margin-top: 4px;
  padding: 0 16px;
  border: 1px solid rgba(163,97,8,.34);
  border-radius: 999px;
  color: var(--gold-hover);
  background: rgba(255,255,255,.58);
  font-family: var(--font-label);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .02em;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease, transform .2s ease;
}

.inline-contact:hover { border-color: var(--gold); color: var(--navy); background: #fff; transform: translateY(-1px); }

.seo-bullets { display: grid; margin: 34px 0 0; padding: 0; border-top: 1px solid var(--line); list-style: none; }
.seo-bullets li { display: grid; grid-template-columns: 34px minmax(0,1fr); gap: 16px; align-items: start; padding: 19px 0; border-bottom: 1px solid var(--line); }
.seo-bullets li > span { padding-top: 2px; color: var(--gold); font-family: var(--font-label); font-size: 10px; font-weight: 700; letter-spacing: .08em; }
.seo-bullets strong, .seo-bullets small { display: block; }
.seo-bullets strong { color: var(--navy); font-family: var(--font-display); font-size: 15px; font-weight: 700; line-height: 1.5; }
.seo-bullets small { margin-top: 5px; color: var(--muted-soft); font-size: 13px; line-height: 1.7; }

.faq-list { border-top: 1px solid var(--line); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  display: grid;
  grid-template-columns: minmax(0,1fr) 24px;
  gap: 22px;
  align-items: center;
  min-height: 72px;
  padding: 15px 0;
  color: var(--navy);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  list-style: none;
}

.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary span { display: grid; width: 24px; height: 24px; place-items: center; color: var(--gold); font-family: var(--font-label); font-size: 21px; font-weight: 400; transition: transform .2s ease, color .2s ease; }
.faq-list summary:hover span { color: var(--gold-hover); }
.faq-list details[open] summary span { transform: rotate(45deg); }
.faq-list details p { max-width: 650px; margin: -2px 46px 22px 0; color: var(--muted); font-size: 14px; line-height: 1.85; }

@media (max-width: 900px) {
  .section-wrap { width: min(100% - 48px, 720px); }
  .seo-article, .faq-section { grid-template-columns: 1fr; gap: 48px; min-height: 0; }
  .seo-article { padding-block: 88px; }
  .faq-section { padding-block: 72px 92px; }
  h1, h2 { max-width: 14em; }
}

@media (max-width: 560px) {
  .section-wrap { width: calc(100% - 32px); }
  .seo-article { gap: 38px; padding-block: 64px 72px; }
  .faq-section { gap: 38px; padding-block: 58px 76px; }
  .eyebrow { margin-bottom: 16px; }
  h1 { max-width: none; font-size: clamp(35px, 10.5vw, 46px); line-height: 1.16; }
  h2 { max-width: none; font-size: clamp(31px, 9.2vw, 40px); line-height: 1.18; }
  .cartoon-product { max-width: 420px; margin: 28px auto 0; }
  .cartoon-faq { max-width: 250px; margin: 26px 0 0; }
  .seo-copy > p { font-size: 15px; line-height: 1.85; }
  .seo-bullets { margin-top: 28px; }
  .seo-bullets li { padding: 17px 0; }
  .faq-list summary { min-height: 68px; font-size: 15px; }
  .faq-list details p { margin-right: 34px; font-size: 14px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
  .inline-contact:hover { transform: none; }
}