:root {
  --color-primary: #1769e0;
  --color-primary-dark: #0e469e;
  --color-navy: #10233f;
  --color-text: #26384f;
  --color-muted: #68788d;
  --color-line: #dfe7f1;
  --color-soft: #f5f8fc;
  --color-white: #ffffff;
  --shadow-card: 0 16px 40px rgba(18, 50, 86, 0.08);
  --radius: 16px;
  --container: 1160px;
}

* { box-sizing: border-box; }
html { overflow-x: hidden; scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  color: var(--color-text);
  background: var(--color-white);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
p, h1, h2, h3 { margin-top: 0; }
.container { width: min(calc(100% - 48px), var(--container)); margin: 0 auto; }
.skip-link { position: fixed; left: 16px; top: -80px; z-index: 1000; padding: 10px 16px; color: #fff; background: var(--color-navy); border-radius: 6px; }
.skip-link:focus { top: 16px; }

.site-header { position: relative; z-index: 100; height: 76px; background: rgba(255, 255, 255, 0.98); border-bottom: 1px solid var(--color-line); }
.header-inner { height: 100%; display: flex; align-items: center; justify-content: space-between; }
.brand { min-width: 0; display: inline-flex; align-items: center; gap: 12px; line-height: 1.25; }
.brand-mark { width: 54px; height: 36px; flex: 0 0 auto; display: block; object-fit: cover; border-radius: 8px; }
.brand-text { min-width: 0; display: flex; flex-direction: column; }
.brand-name { color: var(--color-navy); font-size: 21px; font-weight: 700; letter-spacing: 0.05em; }
.brand-company { margin-top: 3px; color: var(--color-muted); font-size: 11px; letter-spacing: 0.04em; }
.site-nav { display: flex; align-items: center; gap: 34px; }
.site-nav a { position: relative; padding: 25px 0 22px; color: #42536a; font-size: 15px; }
.site-nav a:hover, .site-nav a:focus-visible, .site-nav a[aria-current="page"] { color: var(--color-primary); }
.site-nav a[aria-current="page"]::after { content: ""; position: absolute; left: 0; right: 0; bottom: 15px; height: 2px; background: var(--color-primary); }
.nav-toggle { width: 42px; height: 42px; flex: 0 0 42px; display: none; padding: 9px; border: 0; background: transparent; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; margin: 5px auto; background: var(--color-navy); transition: transform 0.2s ease, opacity 0.2s ease; }

.hero { position: relative; min-height: 610px; display: grid; align-items: center; overflow: hidden; background: linear-gradient(115deg, #f4f8fe 0%, #fff 62%); }
.hero::before { content: ""; position: absolute; width: min(42vw, 560px); aspect-ratio: 3 / 2; right: 2vw; top: 50%; background: url("../assets/brand/logo-mark.png") center / cover no-repeat; border-radius: 46%; opacity: 0.045; transform: translateY(-50%); pointer-events: none; }
.hero-content { position: relative; z-index: 1; padding: 100px 0; }
.eyebrow, .section-label { margin-bottom: 14px; color: var(--color-primary); font-size: 13px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; }
.hero h1 { max-width: 750px; margin-bottom: 24px; color: var(--color-navy); font-size: clamp(40px, 5vw, 64px); line-height: 1.22; letter-spacing: -0.035em; }
.hero-lead { max-width: 650px; margin-bottom: 34px; color: #52647b; font-size: 19px; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.button { min-height: 48px; display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; border: 1px solid transparent; border-radius: 8px; font-size: 15px; font-weight: 600; transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease; }
.button:hover { transform: translateY(-1px); }
.button-primary { color: #fff; background: var(--color-primary); }
.button-primary:hover { background: var(--color-primary-dark); }
.button-secondary { color: var(--color-primary-dark); background: #fff; border-color: #bed2ec; }
.button-secondary:hover { border-color: var(--color-primary); }
.button-light { color: var(--color-primary-dark); background: #fff; }

.section { padding: 104px 0; }
.section-tinted { background: var(--color-soft); }
.split-layout, .content-layout { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 100px; }
.section h2, .content-aside h2 { color: var(--color-navy); font-size: clamp(29px, 3vw, 42px); line-height: 1.35; letter-spacing: -0.02em; }
.prose-large { color: #53657b; font-size: 18px; }
.prose-large p { margin-bottom: 26px; }
.text-link { color: var(--color-primary); font-weight: 600; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 40px; margin-bottom: 46px; }
.section-heading h2 { margin-bottom: 0; }
.section-heading > p { max-width: 440px; margin-bottom: 5px; color: var(--color-muted); }
.section-heading.compact { margin-bottom: 40px; }
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.service-card { min-height: 250px; padding: 30px 26px; background: #fff; border: 1px solid #e5ecf4; border-radius: var(--radius); box-shadow: var(--shadow-card); }
.card-index { color: #91b9ed; font-size: 13px; font-weight: 700; }
.service-card h3 { margin: 46px 0 12px; color: var(--color-navy); font-size: 20px; }
.service-card p { margin-bottom: 0; color: var(--color-muted); font-size: 14px; }
.section-action { margin-top: 34px; text-align: center; }
.contact-cta { padding-top: 88px; }
.cta-panel { display: flex; align-items: center; justify-content: space-between; gap: 48px; padding: 56px 64px; color: #dbe8fb; background: var(--color-navy); border-radius: 20px; }
.cta-panel h2 { margin-bottom: 12px; color: #fff; }
.cta-panel p:not(.section-label) { margin-bottom: 0; }

.page-hero { padding: 105px 0 92px; background: linear-gradient(115deg, #f1f7fe, #fff); border-bottom: 1px solid #e8eef6; }
.page-hero-small { padding-top: 80px; padding-bottom: 70px; }
.page-hero-content { max-width: 820px; }
.page-hero h1 { margin-bottom: 16px; color: var(--color-navy); font-size: clamp(40px, 5vw, 58px); line-height: 1.25; }
.page-hero p:last-child { max-width: 680px; margin-bottom: 0; color: var(--color-muted); font-size: 18px; }
.article-content { color: #53657b; font-size: 18px; }
.article-content p { margin-bottom: 24px; }
.value-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.value-grid article { padding: 34px; background: #fff; border-left: 3px solid var(--color-primary); }
.value-grid h3 { color: var(--color-navy); font-size: 21px; }
.value-grid p { margin-bottom: 0; color: var(--color-muted); }
.simple-cta { display: flex; align-items: center; justify-content: space-between; gap: 48px; }
.simple-cta h2 { margin-bottom: 8px; }
.simple-cta p { margin-bottom: 0; color: var(--color-muted); }
.product-list { border-top: 1px solid var(--color-line); }
.product-item { display: grid; grid-template-columns: 110px 1fr; gap: 30px; padding: 52px 0; border-bottom: 1px solid var(--color-line); }
.product-number { color: #90b5e6; font-size: 15px; font-weight: 700; }
.product-item h2 { margin-bottom: 12px; font-size: 30px; }
.product-item p { max-width: 760px; margin-bottom: 0; color: var(--color-muted); }
.exploration-card { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 70px; align-items: start; padding: 48px 54px; background: #fff; border: 1px solid #e2eaf4; border-radius: var(--radius); box-shadow: var(--shadow-card); }
.exploration-card h2 { margin-bottom: 0; }
.exploration-card > p { margin: 4px 0 0; color: var(--color-muted); font-size: 18px; }
.legal-section { padding-top: 74px; }
.legal-content { max-width: 840px; }
.legal-content > p, .legal-content li { color: #52647a; }
.legal-content h2 { margin: 42px 0 12px; font-size: 24px; }
.legal-content a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.legal-meta { margin-bottom: 38px; padding: 18px 22px; background: var(--color-soft); border-radius: 8px; font-size: 14px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
.contact-intro > p:last-child { color: var(--color-muted); }
.contact-details { margin: 0; border-top: 1px solid var(--color-line); }
.contact-details div { display: grid; grid-template-columns: 110px 1fr; padding: 23px 0; border-bottom: 1px solid var(--color-line); }
.contact-details dt { color: var(--color-muted); font-size: 14px; }
.contact-details dd { margin: 0; color: var(--color-navy); font-weight: 600; }
.contact-link { color: var(--color-primary); overflow-wrap: anywhere; text-decoration: underline; text-underline-offset: 3px; }
.notice-panel { max-width: 800px; }
.notice-panel h2 { font-size: 28px; }
.notice-panel p { margin-bottom: 0; color: var(--color-muted); }

.site-footer { padding: 60px 0 26px; color: #aebdd0; background: #0b1b31; }
.footer-main { display: flex; justify-content: space-between; gap: 48px; padding-bottom: 42px; }
.footer-main p { margin-bottom: 0; font-size: 13px; }
.footer-brand { color: #fff; font-size: 21px !important; font-weight: 700; letter-spacing: 0.06em; }
.footer-nav { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; font-size: 14px; }
.footer-nav a { overflow-wrap: anywhere; }
.footer-nav a:hover, .footer-nav a:focus-visible { color: #fff; }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; padding-top: 22px; border-top: 1px solid #20334d; font-size: 12px; }
.footer-bottom p { margin-bottom: 0; }
.filing-info { min-width: 0; display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 24px; overflow-wrap: anywhere; }
.filing-info a:hover, .filing-info a:focus-visible { color: #fff; }

:focus-visible { outline: 3px solid rgba(23, 105, 224, 0.4); outline-offset: 3px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } }

@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .split-layout, .content-layout { grid-template-columns: 1fr; gap: 26px; }
  .contact-grid { gap: 50px; }
  .hero::before { right: -8vw; }
}

@media (max-width: 720px) {
  .container { width: min(calc(100% - 32px), var(--container)); }
  .site-header { height: 68px; }
  .header-inner { gap: 12px; }
  .brand { gap: 9px; }
  .brand-mark { width: 44px; height: 30px; border-radius: 7px; }
  .brand-name { font-size: 18px; white-space: nowrap; }
  .brand-company { display: none; }
  .nav-toggle { display: block; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .site-nav { position: absolute; top: 68px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px 16px 18px; background: #fff; border-bottom: 1px solid var(--color-line); box-shadow: 0 14px 24px rgba(20, 48, 82, 0.08); }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: 12px 8px; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .hero { min-height: 540px; }
  .hero-content { padding: 76px 0; }
  .hero h1 { font-size: 39px; }
  .hero-lead { font-size: 17px; }
  .hero::before { display: none; }
  .section { padding: 74px 0; }
  .section-heading { display: block; }
  .section-heading > p { margin-top: 14px; }
  .card-grid, .value-grid, .contact-grid, .exploration-card { grid-template-columns: 1fr; }
  .exploration-card { gap: 18px; padding: 34px 28px; }
  .service-card { min-height: 220px; }
  .service-card h3 { margin-top: 30px; }
  .cta-panel { display: block; padding: 42px 28px; }
  .cta-panel .button { margin-top: 28px; }
  .page-hero { padding: 72px 0 64px; }
  .page-hero h1 { font-size: 40px; }
  .simple-cta { display: block; }
  .simple-cta .button { margin-top: 24px; }
  .product-item { grid-template-columns: 1fr; gap: 12px; padding: 38px 0; }
  .footer-main, .footer-bottom { display: block; }
  .footer-nav { margin-top: 30px; }
  .footer-bottom p { margin-bottom: 12px; }
  .filing-info { justify-content: flex-start; }
}

@media (max-width: 420px) {
  .hero-actions .button { width: 100%; }
  .hero h1 { font-size: 34px; }
  .section h2, .content-aside h2 { font-size: 28px; }
  .contact-details div { grid-template-columns: 1fr; gap: 3px; }
}