:root {
  --ink: #1c2929;
  --muted: #667170;
  --paper: #f4f5f2;
  --white: #fff;
  --accent: #d56043;
  --line: #d5dbd7;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; letter-spacing: 0; }
img { display: block; width: 100%; }
a { color: inherit; }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
h1, h2, h3, p { margin-top: 0; }
h1, h2 { font-family: "Songti SC", "Noto Serif CJK SC", serif; font-weight: 600; letter-spacing: 0; }
.shell { width: min(100% - 72px, 1280px); margin-inline: auto; }
.skip-link { position: absolute; z-index: 20; top: -60px; left: 12px; padding: 10px 16px; background: var(--white); }
.skip-link:focus { top: 10px; }
.eyebrow { font-size: 12px; font-weight: 700; letter-spacing: .12em; line-height: 1.5; }

.site-header { position: relative; z-index: 2; background: var(--paper); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 82px; gap: 24px; }
.brand { display: inline-flex; flex-direction: column; text-decoration: none; white-space: nowrap; line-height: 1; }
.brand-name { font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: 26px; font-weight: 700; }
.brand-dot { color: var(--accent); }
.brand-en { margin-top: 7px; font-size: 8px; font-weight: 700; letter-spacing: .14em; }
.nav { display: flex; flex-wrap: wrap; gap: clamp(16px, 3vw, 48px); align-items: center; }
.nav a { font-size: 13px; font-weight: 600; text-decoration: none; white-space: nowrap; }
.nav a:hover { color: var(--accent); }

.hero { position: relative; min-height: min(690px, 75vh); overflow: hidden; background: #aebbb8; }
.hero-image { position: absolute; inset: 0; height: 100%; object-fit: cover; object-position: center 51%; }
.hero-inner { position: relative; z-index: 1; padding-top: clamp(62px, 9vh, 120px); padding-bottom: 160px; }
.hero-eyebrow { margin-bottom: 22px; }
.hero h1 { max-width: 670px; margin-bottom: 24px; font-size: clamp(50px, 6.2vw, 94px); line-height: 1.12; }
.hero-lead { margin-bottom: 30px; font-family: "Songti SC", "Noto Serif CJK SC", serif; font-size: clamp(20px, 2.25vw, 31px); line-height: 1.5; font-weight: 600; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; gap: 42px; padding: 0 22px; text-decoration: none; font-size: 14px; font-weight: 650; transition: background .2s, transform .2s; }
.button:hover { transform: translateY(-2px); }
.button-dark { color: var(--white); background: var(--ink); }
.button-dark:hover { background: #334845; }
.button span { font-size: 19px; font-weight: 400; }
.hero-caption { position: absolute; z-index: 1; right: 36px; bottom: 22px; color: var(--white); font-size: 11px; text-shadow: 0 1px 4px #222; }

.section { padding: 100px 0 104px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 70px; margin-bottom: 50px; }
.section-heading h2, .process-heading h2, .purchase-section h2, .business-section h2 { margin-bottom: 0; font-size: clamp(32px, 3.8vw, 53px); line-height: 1.28; }
.section-heading .eyebrow, .process-heading .eyebrow, .purchase-section .eyebrow, .business-section .eyebrow { margin-bottom: 24px; color: var(--accent); }
.section-intro { max-width: 340px; margin-bottom: 4px; color: var(--muted); font-size: 15px; line-height: 1.85; }
.service-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.service-item { min-width: 0; }
.service-image { overflow: hidden; aspect-ratio: 4 / 5; background: #d7dcd8; }
.service-image img { height: 100%; object-fit: cover; transition: transform .5s; }
.service-item:hover img { transform: scale(1.04); }
.service-item:nth-child(1) img { object-position: 60% center; }
.service-item:nth-child(3) img { object-position: center 64%; }
.service-meta { display: flex; align-items: baseline; gap: 13px; margin-top: 21px; }
.service-meta span { color: var(--accent); font-size: 12px; font-weight: 700; }
.service-meta h3 { margin-bottom: 0; font-size: 19px; font-weight: 650; }
.service-item p { margin: 9px 0 0 28px; color: var(--muted); font-size: 13px; line-height: 1.8; }
.image-note { margin: 35px 0 0; color: var(--muted); font-size: 12px; }

.process-section { padding: 96px 0; color: #edf4ef; background: var(--ink); }
.process-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 12%; }
.process-heading .eyebrow { color: #f2977c; }
.process-heading p:last-child { max-width: 350px; margin-top: 28px; color: #bccdc8; font-size: 15px; line-height: 1.85; }
.process-list { margin: 0; padding: 0; list-style: none; }
.process-list li { display: flex; gap: 32px; padding: 24px 0; border-top: 1px solid #5a6966; }
.process-list li:last-child { border-bottom: 1px solid #5a6966; }
.step-number { padding-top: 3px; color: #f2977c; font-size: 13px; font-weight: 700; }
.process-list h3 { margin-bottom: 8px; font-size: 19px; }
.process-list p { margin-bottom: 0; color: #bccdc8; font-size: 14px; line-height: 1.8; }

.purchase-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 12%; }
.purchase-lead { max-width: 475px; margin-top: 25px; font-size: 17px; line-height: 1.85; }
.terms-list { border-top: 1px solid var(--line); }
.terms-list > div { display: grid; grid-template-columns: 88px 1fr; gap: 12px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.terms-list h3 { margin: 0; font-size: 15px; }
.terms-list p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.75; }

.business-section { padding: 74px 0 82px; background: #e5ebe6; }
.business-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 8%; }
.business-layout dl { margin: 0; }
.business-layout dl > div { display: grid; grid-template-columns: 142px 1fr; gap: 14px; padding: 15px 0; border-bottom: 1px solid #c6d1ca; font-size: 14px; line-height: 1.75; }
.business-layout dl > div:first-child { padding-top: 0; }
.business-layout dt { color: var(--muted); }
.business-layout dd { margin: 0; font-weight: 600; overflow-wrap: anywhere; }
.site-footer { color: #d9e4de; background: var(--ink); }
.footer-inner { display: flex; justify-content: space-between; gap: 32px; align-items: center; padding: 32px 0; font-size: 12px; }
.footer-inner div { display: flex; flex-direction: column; gap: 6px; }
.footer-inner strong { color: #fff; font-size: 17px; }
.footer-inner p { margin: 0; text-align: right; }

@media (max-width: 900px) {
  .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 36px; }
  .process-layout, .purchase-layout { gap: 7%; }
  .business-layout { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 640px) {
  .shell { width: min(100% - 36px, 1280px); }
  .header-inner { min-height: 94px; align-items: flex-start; flex-direction: column; justify-content: center; gap: 13px; }
  .brand-name { font-size: 23px; }
  .brand-en { font-size: 7px; margin-top: 4px; }
  .nav { width: 100%; justify-content: space-between; gap: 8px; }
  .nav a { font-size: 11px; }
  .hero { min-height: min(660px, 70svh); }
  .hero-image { object-position: 44% center; }
  .hero-inner { padding-top: 44px; padding-bottom: 120px; }
  .hero-eyebrow { margin-bottom: 15px; font-size: 10px; }
  .hero h1 { margin-bottom: 15px; font-size: clamp(42px, 12vw, 63px); }
  .hero-lead { margin-bottom: 22px; font-size: 19px; }
  .button { min-height: 46px; gap: 18px; padding-inline: 17px; font-size: 13px; }
  .hero-caption { right: 18px; bottom: 14px; font-size: 10px; }
  .section { padding: 68px 0 74px; }
  .section-heading { display: block; margin-bottom: 33px; }
  .section-heading .eyebrow, .process-heading .eyebrow, .purchase-section .eyebrow, .business-section .eyebrow { margin-bottom: 16px; }
  .section-heading h2, .process-heading h2, .purchase-section h2, .business-section h2 { font-size: 33px; }
  .section-intro { max-width: 100%; margin-top: 18px; font-size: 14px; }
  .service-grid { gap: 30px 12px; }
  .service-image { aspect-ratio: 3 / 4; }
  .service-meta { gap: 7px; margin-top: 12px; }
  .service-meta span { font-size: 10px; }
  .service-meta h3 { font-size: 15px; }
  .service-item p { margin-left: 0; font-size: 12px; }
  .image-note { margin-top: 26px; line-height: 1.7; }
  .process-section { padding: 68px 0; }
  .process-layout, .purchase-layout { grid-template-columns: 1fr; gap: 30px; }
  .process-heading p:last-child { margin-top: 18px; font-size: 14px; }
  .process-list li { padding: 20px 0; gap: 23px; }
  .purchase-lead { margin-top: 18px; font-size: 15px; }
  .terms-list > div { grid-template-columns: 70px 1fr; }
  .business-section { padding: 65px 0; }
  .business-layout dl > div { grid-template-columns: 1fr; gap: 1px; font-size: 13px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 20px; }
  .footer-inner p { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .service-image img { transition: none; }
}