:root {
  color-scheme: light;
  --ink: #17251f;
  --muted: #58675f;
  --body-copy: #3a4a42;
  --line: #dde5df;
  --surface: #f4f7f3;
  --brand: #082d25;
  --brand-dark: #04201a;
  --accent: #b9f568;
  --on-dark: #fff;
  --on-dark-muted: rgba(255, 255, 255, .75);
  --on-dark-faint: rgba(255, 255, 255, .62);
  --white: #fff;
  --header-h: 72px;
}

* { box-sizing: border-box; }
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  font-size: 17px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { display: block; }
h1, h2, h3, p, figure { margin-top: 0; }
figure { margin: 0; }
[id] { scroll-margin-top: calc(var(--header-h) + 16px); }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
.dark :focus-visible { outline-color: var(--accent); }

.container { width: min(1200px, 100% - 40px); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: var(--header-h);
  padding: 0 max(20px, calc((100% - 1200px) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .94);
  backdrop-filter: blur(18px);
}
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; font-size: 19px; font-weight: 700; text-decoration: none; }
.brand img { width: 44px; height: 44px; border-radius: 10px; object-fit: cover; }
nav { display: flex; align-items: center; gap: 36px; }
nav a, .footer-links a { color: var(--muted); font-size: 15px; font-weight: 600; text-decoration: none; white-space: nowrap; }
nav a:hover, .footer-links a:hover, nav a[aria-current="page"] { color: var(--brand); }
nav a[aria-current="page"] { font-weight: 700; box-shadow: inset 0 -3px var(--accent); }
nav .nav-cta { display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; border-radius: 12px; background: var(--brand); color: var(--white); font-weight: 700; }
nav .nav-cta:hover { background: var(--brand-dark); color: var(--white); }

.eyebrow { margin-bottom: 14px; color: var(--brand); font-size: 13px; font-weight: 800; letter-spacing: .16em; }
.eyebrow.marked { display: flex; align-items: center; gap: 10px; }
.eyebrow.marked::before { content: ""; width: 24px; height: 4px; border-radius: 2px; background: var(--accent); }
.dark .eyebrow { color: var(--accent); }
h1 { margin-bottom: 26px; font-size: clamp(40px, 5.4vw, 78px); font-weight: 800; line-height: 1.1; letter-spacing: -.02em; }
h2 { margin-bottom: 18px; font-size: clamp(28px, 3.1vw, 44px); font-weight: 800; line-height: 1.25; letter-spacing: -.01em; }
h3 { margin-bottom: 8px; font-size: 22px; line-height: 1.4; }

.button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 52px; padding: 0 28px; border: 1px solid transparent; border-radius: 12px; font-size: 17px; font-weight: 700; text-decoration: none; }
.button.primary { background: var(--brand); color: var(--white); }
.button.primary:hover { background: var(--brand-dark); }
.button.secondary, .button.outline { border-color: currentColor; color: var(--brand); }
.button.secondary:hover, .button.outline:hover { background: var(--surface); }
.dark .button.primary { background: var(--accent); color: var(--brand); }
.dark .button.primary:hover { background: #a8e852; }
.dark .button.secondary { border-color: rgba(255, 255, 255, .7); color: var(--on-dark); }
.dark .button.secondary:hover { border-color: var(--on-dark); background: rgba(255, 255, 255, .08); }
.button:active, nav .nav-cta:active { transform: translateY(1px); }
.button[aria-disabled="true"] { opacity: .45; pointer-events: none; }
.legal-main a:hover, .contact-list dd a:hover { text-decoration-thickness: 2px; }
@media (prefers-reduced-motion: no-preference) {
  .button, nav a, .footer-links a { transition: color .15s ease, background-color .15s ease, border-color .15s ease, transform .15s ease; }
}

.dark { position: relative; overflow: hidden; background: var(--brand); color: var(--on-dark); }
.pitch-lines { position: absolute; inset: 0; width: 100%; height: 100%; color: var(--accent); opacity: .09; pointer-events: none; }

.hero-inner { position: relative; display: grid; grid-template-columns: 55fr 45fr; gap: 40px; align-items: center; min-height: 760px; padding: 56px 0; }
.hero h1 span { color: var(--accent); }
.hero-lead { max-width: 540px; color: var(--on-dark-muted); font-size: 20px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 36px; }
.availability { margin: 20px 0 0; color: var(--on-dark-faint); font-size: 14px; }
.hero-visual { position: relative; height: 640px; }
.hero-visual .phone-front { position: absolute; top: 10px; left: 196px; }
.hero-visual .phone-back { --w: 246px; position: absolute; top: 96px; left: 0; }

.phone { --w: 300px; flex-shrink: 0; width: var(--w); height: calc(var(--w) * 2.067); padding: calc(var(--w) * .033); border-radius: calc(var(--w) * .16); background: #0e1a16; box-shadow: 0 30px 60px rgba(4, 20, 16, .28); }
.phone-screen { position: relative; display: flex; align-items: flex-end; height: 100%; overflow: hidden; border-radius: calc(var(--w) * .127); background: #0e1a16; }
.phone-screen img { width: 100%; height: 100%; object-fit: cover; object-position: top; }

.section { padding: 96px 0; }
.section-heading { max-width: 760px; margin-bottom: 72px; }
.section-heading > p:last-child { margin: 0; color: var(--muted); }

.feature-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 96px; align-items: center; }
.feature-row + .feature-row { margin-top: 96px; }
.feature-row.reverse .feature-media { order: -1; }
.feature-index { display: flex; align-items: baseline; gap: 14px; margin-bottom: 20px; color: var(--muted); font-size: 15px; font-weight: 700; }
.feature-index span { padding-bottom: 2px; border-bottom: 3px solid var(--accent); color: var(--brand); font-weight: 800; }
.feature-copy h3 { margin-bottom: 20px; font-size: clamp(24px, 2.4vw, 34px); font-weight: 800; line-height: 1.3; }
.feature-copy > p:not(.feature-index) { color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 0; padding: 0; list-style: none; }
.tags li { padding: 4px 14px; border-radius: 999px; background: var(--surface); font-size: 14px; }
.feature-media { display: flex; align-items: center; justify-content: center; height: 560px; overflow: hidden; border-radius: 28px; background: var(--surface); }
.feature-media .phone { --w: 246px; }
.feature-media.crop-bottom { align-items: flex-start; padding-top: 56px; }
.feature-media.crop-top { align-items: flex-end; padding-bottom: 56px; }
.feature-media.crop-bottom .phone, .feature-media.crop-top .phone { --w: 280px; }
.crop-bottom .phone-screen { align-items: center; }
.pitch-center { background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 560 560' fill='none' stroke='%23082d25' stroke-opacity='.12' stroke-width='1.5'%3E%3Cpath d='M0 280h560'/%3E%3Ccircle cx='280' cy='280' r='190'/%3E%3C/svg%3E") center / cover no-repeat; }
.pitch-box { background: var(--surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 560 560' fill='none' stroke='%23082d25' stroke-opacity='.12' stroke-width='1.5'%3E%3Cpath d='M-2 120h160v320H-2M-2 210h58v140H-2M158 232a64 64 0 0 1 0 96'/%3E%3Ccircle cx='112' cy='280' r='3' fill='%23082d25' fill-opacity='.12' stroke='none'/%3E%3C/svg%3E") left center / cover no-repeat; }
.pitch-corner {
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' fill='none' stroke='%23082d25' stroke-opacity='.12' stroke-width='1.5'%3E%3Cpath d='M1 120V1h119M1 44A43 43 0 0 0 44 1'/%3E%3C/svg%3E") left 24px top 24px / 120px no-repeat,
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120' fill='none' stroke='%23082d25' stroke-opacity='.12' stroke-width='1.5'%3E%3Cpath d='M119 0v119H0M119 76A43 43 0 0 0 76 119'/%3E%3C/svg%3E") right 24px bottom 24px / 120px no-repeat,
    var(--surface);
}

.notice-section { background: var(--surface); }
.notice-card { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; padding: 56px; border: 1px solid var(--line); border-radius: 24px; background: var(--white); }
.notice-icon { display: flex; align-items: center; justify-content: center; width: 52px; height: 52px; margin-bottom: 18px; border-radius: 14px; background: var(--brand); color: var(--accent); }
.notice-title h2 { margin: 0; font-size: clamp(24px, 2.5vw, 36px); line-height: 1.3; }
.notice-copy p { color: var(--body-copy); line-height: 1.8; }
.notice-copy p:last-child { margin-bottom: 0; }

.download-inner { position: relative; display: grid; grid-template-columns: 1fr 300px; gap: 96px; align-items: center; }
.download-copy h2 { color: var(--on-dark); }
.download-copy > p:not(.eyebrow):not(.availability) { color: var(--on-dark-muted); font-size: 18px; }
.download .hero-actions { margin-top: 24px; }
.mobile-break { display: none; }
.qr-card { display: flex; flex-direction: column; align-items: center; gap: 14px; padding: 24px; border-radius: 20px; background: var(--white); color: var(--ink); text-align: center; }
.qr-card p { margin: 0; font-size: 15px; }
.qr-placeholder { display: flex; align-items: center; justify-content: center; width: 180px; height: 180px; border: 2px dashed #cbd6ce; border-radius: 8px; background: var(--surface); color: var(--muted); font-size: 13px; font-weight: 700; }
.qr-card .qr-url { color: var(--muted); font-size: 13px; }

.about-inner { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 96px; }
.about-lead { color: var(--muted); }
.contact-list dl { margin: 0 0 24px; border-bottom: 1px solid var(--line); }
.contact-list dl div { display: grid; grid-template-columns: 120px 1fr; padding: 16px 0; border-top: 1px solid var(--line); }
.contact-list dt { color: var(--muted); font-size: 15px; }
.contact-list dd { margin: 0; font-weight: 700; }
.contact-list dd a { color: var(--brand); }
.button.outline { min-height: 48px; padding: 0 22px; font-size: 16px; }

footer { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 28px; padding: 36px max(20px, calc((100% - 1200px) / 2)); border-top: 1px solid var(--line); background: var(--surface); color: var(--muted); font-size: 14px; }
footer p { margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 28px; }
.footer-links a { font-size: 14px; }
.site-footer { display: block; padding-inline: 0; }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px 28px; }
.footer-brand { display: flex; align-items: center; gap: 10px; }
.footer-brand img { width: 32px; height: 32px; border-radius: 8px; }
.footer-note { flex-basis: 100%; font-size: 13px; }

.legal-header { position: static; }
.legal-main { max-width: 808px; margin: 0 auto; padding: 80px 24px 120px; }
.legal-main .updated { margin-bottom: 40px; color: var(--muted); font-size: 16px; }
.legal-main h1 { margin-bottom: 12px; font-size: clamp(32px, 6vw, 48px); line-height: 1.2; }
.legal-main h2 { margin: 48px 0 14px; font-size: clamp(22px, 3vw, 28px); }
.legal-main h3 { margin: 28px 0 10px; font-size: 18px; }
.legal-main p, .legal-main li { color: var(--body-copy); font-size: 16px; line-height: 1.8; }
.legal-main li + li { margin-top: 8px; }
.legal-main a { color: var(--brand); }
.legal-main .notice { padding: 20px 22px; border-radius: 16px; background: var(--brand); color: rgba(255, 255, 255, .88); }
.contact-card { padding: 28px 32px; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); }
.contact-card h3 { margin-top: 0; }
.table-wrap { overflow-x: auto; margin: 16px 0; border: 1px solid var(--line); border-radius: 16px; }
.data-table { width: 100%; min-width: 560px; border-collapse: collapse; font-size: 15px; line-height: 1.7; }
.data-table th, .data-table td { padding: 12px 16px; border-top: 1px solid var(--line); color: var(--body-copy); text-align: left; vertical-align: top; }
.data-table thead th { border-top: 0; background: var(--surface); color: var(--ink); font-weight: 700; white-space: nowrap; }
.data-table td:first-child { width: 28%; color: var(--ink); font-weight: 700; }
.english-summary { margin-top: 56px; padding-top: 8px; border-top: 1px solid var(--line); }

@media (min-width: 1024px) and (max-width: 1199px) {
  .hero-visual { height: 560px; }
  .hero-visual .phone-front { --w: 264px; left: 160px; }
  .hero-visual .phone-back { --w: 216px; top: 84px; }
}

@media (max-width: 1023px) {
  .hero-inner,.feature-row, .notice-card, .download-inner, .about-inner { grid-template-columns: 1fr; }
  .hero-inner { gap: 48px; min-height: 0; padding: 72px 0; }
  .hero-visual { justify-self: center; width: 496px; }
  .feature-row { gap: 40px; }
  .feature-row.reverse .feature-media { order: 0; }
  .notice-card, .download-inner, .about-inner { gap: 40px; }
  .qr-card { justify-self: start; }
}

@media (max-width: 639px) {
  :root { --header-h: 60px; }
  body { font-size: 16px; }
  .site-header { padding: 0 16px; }
  .brand { gap: 8px; font-size: 16px; }
  .brand img { width: 36px; height: 36px; border-radius: 9px; }
  nav { gap: 14px; }
  nav a { font-size: 14px; }
  .nav-optional, .nav-long { display: none; }
  nav .nav-cta { min-height: 40px; padding: 0 16px; border-radius: 10px; }
  .legal-header .brand { font-size: 15px; }
  .legal-header .brand img { width: 32px; height: 32px; }
  .legal-header nav { gap: 12px; }
  .hero-inner { gap: 32px; padding: 44px 0 52px; }
  .hero-lead { font-size: 16px; }
  .hero-actions { flex-direction: column; margin-top: 28px; }
  .hero-actions .button { width: 100%; min-height: 50px; }
  .hero .availability { text-align: center; }
  .hero-visual { width: auto; height: auto; }
  .hero-visual .phone-back { display: none; }
  .hero-visual .phone-front { --w: 240px; position: static; }
  .section { padding: 64px 0; }
  .section-heading { margin-bottom: 48px; }
  .feature-row { gap: 24px; }
  .feature-row + .feature-row { margin-top: 56px; }
  .feature-index { margin-bottom: 16px; font-size: 14px; }
  .feature-copy h3 { margin-bottom: 16px; }
  .feature-media { height: 440px; border-radius: 22px; }
  .feature-media .phone { --w: 192px; }
  .feature-media.crop-bottom { padding-top: 40px; }
  .feature-media.crop-top { padding-bottom: 40px; }
  .feature-media.crop-bottom .phone, .feature-media.crop-top .phone { --w: 220px; }
  .pitch-corner { background-size: 88px, 88px; background-position: left 16px top 16px, right 16px bottom 16px; }
  .notice-section { padding: 48px 0; }
  .notice-card { gap: 16px; padding: 24px; border-radius: 20px; }
  .notice-icon { width: 44px; height: 44px; margin-bottom: 16px; }
  .download-copy > p:not(.eyebrow):not(.availability) { font-size: 16px; }
  .download .availability { text-align: center; }
  .mobile-break { display: inline; }
  .qr-card { display: none; }
  .contact-list dl div { grid-template-columns: 1fr; gap: 4px; padding: 14px 0; }
  .contact-list .button.outline { width: 100%; }
  footer { padding: 32px 20px; }
  .site-footer { padding-inline: 0; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .legal-main { padding: 44px 20px 72px; }
  .contact-card { padding: 20px; }
}

@media (max-width: 640px) {
  .data-table { min-width: 0; }
  .data-table thead { display: none; }
  .data-table tr, .data-table td { display: block; width: auto; }
  .data-table tr { padding: 12px 0; }
  .data-table tr + tr { border-top: 1px solid var(--line); }
  .data-table td, .data-table td:first-child { width: auto; padding: 2px 16px; border-top: 0; }
  .data-table td:nth-child(2)::before { content: "用途："; color: var(--muted); }
  .data-table td:nth-child(3)::before { content: "涉及信息："; color: var(--muted); }
}