:root {
  --ink: #172033;
  --muted: #667085;
  --line: #dce3ef;
  --paper: #f6f8fc;
  --surface: #ffffff;
  --blue: #4f73df;
  --blue-deep: #3155bd;
  --blue-soft: #eaf0ff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Noto Sans CJK SC", "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

a:focus-visible { outline: 3px solid color-mix(in srgb, var(--blue) 72%, transparent); outline-offset: 4px; border-radius: 4px; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 14px; border-radius: 10px; background: var(--ink); color: white; transform: translateY(-160%); }
.skip-link:focus { transform: translateY(0); }

.shell { width: min(1120px, calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 72%, transparent);
  backdrop-filter: blur(18px);
}

.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.header-actions { display: flex; align-items: center; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-size: 20px; font-weight: 760; letter-spacing: -0.02em; }
.brand img { width: 38px; height: 38px; border-radius: 11px; box-shadow: 0 7px 18px rgba(49, 85, 189, .16); }
.brand small { color: var(--muted); font-size: 14px; font-weight: 600; }
nav { display: flex; gap: 28px; }
nav a { color: var(--ink); text-decoration: none; font-size: 14px; font-weight: 650; }
nav a span { color: var(--muted); font-size: 11px; font-weight: 500; margin-left: 3px; }
nav a:hover, nav a:focus-visible { color: var(--blue-deep); }
nav a[aria-current="page"] { color: var(--blue-deep); }
.language-switch { display: inline-flex; align-items: center; gap: 3px; padding: 4px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); }
.language-switch a { min-width: 34px; padding: 6px 8px; border-radius: 999px; color: var(--muted); font-size: 12px; font-weight: 700; text-align: center; text-decoration: none; }
.language-switch a[aria-current="true"] { background: var(--blue-soft); color: var(--blue-deep); }

.hero { min-height: 670px; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 64px; padding-block: 92px 80px; }
.eyebrow { margin: 0 0 18px; color: var(--blue-deep); font-size: 12px; font-weight: 800; letter-spacing: .17em; }
.hero h1 { margin: 0; max-width: 720px; font-size: clamp(48px, 6vw, 78px); line-height: 1.06; letter-spacing: -.055em; }
.hero h1 span { display: block; color: var(--blue); }
.lead { max-width: 650px; margin: 30px 0 0; color: #3d495f; font-size: 19px; line-height: 1.78; }
.lead-en { margin: 12px 0 0; color: var(--muted); font-size: 14px; line-height: 1.6; }
.actions { display: flex; align-items: center; gap: 28px; margin-top: 34px; }
.primary-action { display: inline-flex; align-items: baseline; gap: 8px; padding: 14px 20px; border-radius: 16px; background: var(--ink); color: white; text-decoration: none; font-weight: 720; box-shadow: 0 10px 28px rgba(23, 32, 51, .18); }
.primary-action span { color: #bdc8de; font-size: 12px; }
.text-action { color: var(--blue-deep); text-decoration: none; font-weight: 680; }
.primary-action:hover, .primary-action:focus-visible { background: var(--blue-deep); transform: translateY(-1px); }

.hero-art { position: relative; min-height: 430px; display: grid; place-items: center; }
.icon-frame { position: relative; z-index: 2; width: min(300px, 68vw); aspect-ratio: 1; padding: 18px; border-radius: 31%; background: rgba(255,255,255,.7); box-shadow: 0 38px 80px rgba(44, 70, 130, .18); transform: rotate(2deg); }
.icon-frame img { width: 100%; height: 100%; border-radius: 27%; display: block; }
.orbit { position: absolute; border-radius: 50%; border: 1px solid #cad5ec; }
.orbit-one { width: 390px; height: 390px; }
.orbit-two { width: 480px; height: 250px; transform: rotate(-24deg); border-color: #dce4f4; }
.privacy-chip { position: absolute; z-index: 3; right: 4px; bottom: 30px; display: flex; align-items: center; gap: 9px; padding: 12px 16px; border: 1px solid var(--line); border-radius: 999px; background: white; color: #46536b; font-size: 13px; font-weight: 650; box-shadow: 0 12px 30px rgba(41, 55, 83, .12); }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: #4aa579; box-shadow: 0 0 0 5px #e6f5ee; }

.feature-section { padding-block: 100px; border-top: 1px solid var(--line); }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 40px; margin-bottom: 44px; }
.section-heading h2, .offline-section h2 { margin: 0; font-size: clamp(34px, 4vw, 52px); letter-spacing: -.04em; }
.section-heading > p { max-width: 360px; margin: 0; color: var(--muted); text-align: right; line-height: 1.7; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-card { position: relative; min-height: 300px; padding: 34px; overflow: hidden; border: 1px solid var(--line); border-radius: 28px; background: var(--surface); box-shadow: 0 16px 45px rgba(58, 78, 120, .06); }
.feature-card::after { content: ""; position: absolute; right: -50px; bottom: -74px; width: 160px; height: 160px; border-radius: 50%; background: var(--blue-soft); }
.feature-number { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .14em; }
.feature-card h3 { margin: 62px 0 4px; font-size: 28px; letter-spacing: -.03em; }
.feature-card p { position: relative; z-index: 1; color: #556177; line-height: 1.72; }
.feature-card .feature-english { margin: 0; color: var(--blue-deep); font-size: 13px; font-weight: 650; }

.offline-section { margin-bottom: 110px; display: grid; grid-template-columns: auto 1fr .55fr; align-items: center; gap: 34px; padding: 48px; border-radius: 34px; background: var(--ink); color: white; }
.offline-mark { display: grid; place-items: center; width: 74px; height: 74px; border-radius: 24px; background: var(--blue); font-size: 36px; font-weight: 900; }
.offline-section .eyebrow { color: #91aaff; }
.offline-section h2 { font-size: clamp(28px, 3vw, 42px); }
.offline-section div > p:last-child, .offline-en { color: #b8c2d6; line-height: 1.72; }
.offline-en { padding-left: 30px; border-left: 1px solid #43506a; }

.document-main { padding-bottom: 100px; }
.document-hero { padding-block: 90px 56px; border-bottom: 1px solid var(--line); }
.document-hero h1 { margin: 0; font-size: clamp(48px, 7vw, 78px); letter-spacing: -.055em; }
.document-hero > p:not(.eyebrow) { max-width: 650px; color: #4e5a70; font-size: 18px; line-height: 1.7; }
.document-hero .document-en { color: var(--muted); font-size: 14px; }
.document-grid { display: grid; grid-template-columns: 1fr 330px; gap: 56px; align-items: start; padding-top: 60px; }
.document-content { display: grid; gap: 18px; }
.faq { display: grid; grid-template-columns: 48px 1fr; gap: 18px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.faq > span, .policy-index { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.faq h2, .contact-card h2, .policy h2 { margin: 0; font-size: 22px; letter-spacing: -.025em; }
.faq p { color: #556177; line-height: 1.75; }
.faq .faq-en { margin: 5px 0 12px; color: var(--blue-deep); font-size: 13px; font-weight: 650; }
.contact-card { position: sticky; top: 106px; padding: 30px; border-radius: 26px; background: var(--blue-soft); border: 1px solid #d6e0fa; }
.contact-card > p { color: #4c5a73; line-height: 1.7; }
.contact-card .contact-en { font-size: 12px; }
.contact-card > a { color: var(--blue-deep); font-weight: 720; text-decoration: none; }
.email-link { display: block; margin: 20px 0; overflow-wrap: anywhere; }
.email-pending { padding: 12px 14px; border-radius: 12px; background: #fff5d9; color: #795b12 !important; font-weight: 700; }

.policy { max-width: 900px; padding-top: 58px; }
.policy > section { display: grid; grid-template-columns: 70px 1fr; gap: 22px; padding: 34px 0; border-bottom: 1px solid var(--line); }
.policy p, .policy li { color: #4f5b70; line-height: 1.78; }
.policy ul { padding-left: 20px; }
.policy a { color: var(--blue-deep); font-weight: 700; }
.policy-en { color: var(--muted) !important; font-size: 14px; }
.english-summary { margin-top: 50px; padding: 36px; border: 1px solid #d6e0fa; border-radius: 28px; background: var(--blue-soft); }
.english-summary h2 { font-size: 30px; }

.site-footer { border-top: 1px solid var(--line); background: var(--surface); }
.footer-inner { min-height: 180px; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; }
.footer-inner strong { font-size: 18px; }
.footer-inner p { color: var(--muted); }
.footer-links { display: flex; gap: 24px; }
.footer-links a { color: var(--blue-deep); text-decoration: none; font-weight: 650; }
.copyright { grid-column: 1 / -1; margin-top: -38px; font-size: 12px; }

@media (max-width: 850px) {
  .hero { grid-template-columns: 1fr; padding-top: 70px; }
  .hero-art { min-height: 360px; order: -1; }
  .icon-frame { width: 230px; }
  .orbit-one { width: 310px; height: 310px; }
  .orbit-two { width: 360px; height: 200px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 240px; }
  .feature-card h3 { margin-top: 36px; }
  .offline-section { grid-template-columns: auto 1fr; }
  .offline-en { grid-column: 1 / -1; padding: 24px 0 0; border-left: 0; border-top: 1px solid #43506a; }
  .document-grid { grid-template-columns: 1fr; }
  .contact-card { position: static; }
}

@media (max-width: 620px) {
  .shell { width: min(100% - 28px, 1120px); }
  .header-inner { min-height: 68px; }
  .header-actions { gap: 10px; }
  nav { gap: 14px; }
  nav a span { display: none; }
  .language-switch a { min-width: 30px; padding-inline: 6px; }
  .brand small { display: none; }
  .hero { gap: 34px; padding-block: 45px 66px; }
  .hero-art { min-height: 285px; }
  .icon-frame { width: 190px; padding: 12px; }
  .orbit-one { width: 260px; height: 260px; }
  .orbit-two { width: 300px; height: 170px; }
  .privacy-chip { right: 0; bottom: 2px; }
  .hero h1 { font-size: 45px; }
  .lead { font-size: 17px; }
  .actions { align-items: flex-start; flex-direction: column; gap: 18px; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .section-heading > p { text-align: left; }
  .offline-section { grid-template-columns: 1fr; padding: 30px; }
  .offline-en { grid-column: auto; }
  .document-hero { padding-block: 60px 40px; }
  .document-hero h1 { font-size: 50px; }
  .faq, .policy > section { grid-template-columns: 1fr; gap: 12px; }
  .footer-inner { grid-template-columns: 1fr; padding-block: 46px; }
  .copyright { grid-column: auto; margin-top: 0; }
}

@media (max-width: 470px) {
  nav a { display: none; }
  nav a[aria-current="page"] { display: inline; }
}

@media (prefers-reduced-motion: no-preference) {
  .primary-action, nav a { transition: color .2s ease, background .2s ease, transform .2s ease; }
}