:root {
  --blue-950: #082a5d;
  --blue-900: #0b3c82;
  --blue-700: #1459ad;
  --blue-100: #eaf3ff;
  --green-600: #57952f;
  --green-100: #eef7e8;
  --milk: #fbfcfa;
  --cream: #f5f1e8;
  --ink: #122238;
  --muted: #657286;
  --line: #dfe6ed;
  --white: #fff;
  --shadow: 0 20px 60px rgba(8, 42, 93, .12);
  --radius: 22px;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--milk);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--milk); }
body, button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { color: inherit; }
.container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; left: 16px; top: -80px; background: var(--white); padding: 12px 18px; border-radius: 8px; box-shadow: var(--shadow); }
.skip-link:focus { top: 16px; }

.site-header { position: fixed; z-index: 30; inset: 0 0 auto; background: rgba(255,255,255,.94); backdrop-filter: blur(16px); border-bottom: 1px solid rgba(11,60,130,.08); }
.header-inner { width: min(1240px, calc(100% - 32px)); min-height: 78px; margin: auto; display: flex; align-items: center; gap: 32px; }
.brand img { width: 176px; height: auto; }
.site-nav { display: flex; align-items: center; justify-content: center; gap: 30px; margin-left: auto; }
.site-nav a { font-size: .95rem; color: #34445a; font-weight: 600; }
.site-nav a:hover, .site-nav a:focus-visible { color: var(--blue-700); }
.header-cta { padding: 12px 19px; border-radius: 999px; background: var(--blue-900); color: var(--white); font-weight: 700; }
.menu-toggle { display: none; border: 0; background: transparent; padding: 9px; }
.menu-toggle span:not(.sr-only) { display: block; width: 24px; height: 2px; background: var(--blue-900); margin: 5px 0; }

.hero { position: relative; min-height: 720px; display: grid; align-items: center; overflow: hidden; padding-top: 78px; }
.hero-image, .hero-overlay { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero-image { object-position: center; }
.hero-overlay { background: linear-gradient(90deg, rgba(5,31,70,.88) 0%, rgba(5,31,70,.68) 34%, rgba(5,31,70,.12) 66%, rgba(5,31,70,0) 100%); }
.hero-content { position: relative; z-index: 2; color: var(--white); padding-block: 110px 80px; }
.eyebrow { margin: 0 0 16px; font-size: .82rem; letter-spacing: .2em; font-weight: 800; color: #7fc64d; }
.hero h1 { max-width: 680px; margin: 0; font-size: clamp(3.4rem, 7vw, 6.6rem); letter-spacing: -.055em; line-height: .98; }
.hero-copy { max-width: 570px; margin: 26px 0 0; font-size: clamp(1.05rem, 1.6vw, 1.3rem); line-height: 1.8; color: rgba(255,255,255,.88); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.button { min-height: 50px; padding: 0 24px; border-radius: 999px; display: inline-flex; align-items: center; justify-content: center; font-weight: 750; }
.button-primary { background: var(--white); color: var(--blue-950); }
.button-ghost { color: var(--white); border: 1px solid rgba(255,255,255,.6); background: rgba(255,255,255,.08); }
.button:hover { transform: translateY(-2px); }
.hero-note { margin: 22px 0 0; font-size: .84rem; color: rgba(255,255,255,.65); }

.trust-strip { position: relative; z-index: 5; margin-top: -46px; }
.trust-grid { padding: 26px 32px; display: grid; grid-template-columns: repeat(4, 1fr); background: var(--white); border-radius: 18px; box-shadow: var(--shadow); }
.trust-grid div { padding: 4px 28px; border-right: 1px solid var(--line); }
.trust-grid div:last-child { border-right: 0; }
.trust-grid strong, .trust-grid span { display: block; }
.trust-grid strong { color: var(--blue-900); font-size: 1.02rem; }
.trust-grid span { margin-top: 7px; color: var(--muted); font-size: .86rem; }

.section { padding: 118px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 42px; }
.section-heading h2 { max-width: 720px; margin: 0; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.16; letter-spacing: -.035em; }
.text-link { color: var(--blue-700); font-weight: 700; white-space: nowrap; }
.product-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.product-card { overflow: hidden; min-width: 0; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); transition: .25s ease; }
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.product-card > img, .product-art { width: 100%; aspect-ratio: 1/1; object-fit: cover; background: #f2f5f9; }
.product-art > img { width: 100%; height: 100%; object-fit: cover; }
.product-body { padding: 24px; }
.product-type { margin: 0 0 8px; color: var(--green-600); font-size: .82rem; font-weight: 800; }
.product-body h3 { margin: 0; font-size: 1.3rem; }
.product-body > p:not(.product-type) { min-height: 48px; margin: 12px 0 18px; color: var(--muted); font-size: .93rem; line-height: 1.6; }
.product-body a, .product-detail { padding: 0; border: 0; background: none; color: var(--blue-700); font-weight: 750; cursor: pointer; }
.product-art-fresh { position: relative; overflow: hidden; }
.product-art-fresh::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(8,42,93,.3)); }
.product-tag { position: absolute; z-index: 2; left: 18px; top: 18px; padding: 7px 11px; border-radius: 999px; color: var(--white); background: var(--green-600); font-size: .75rem; font-weight: 800; }

.quality { background: var(--blue-950); color: var(--white); }
.quality-layout { display: grid; grid-template-columns: .92fr 1.08fr; gap: 76px; align-items: center; }
.quality h2, .journey h2, .buy h2, .knowledge h2, .about h2 { margin: 0; font-size: clamp(2.2rem, 4vw, 3.55rem); line-height: 1.12; letter-spacing: -.045em; }
.lead { margin: 24px 0 34px; max-width: 620px; color: rgba(255,255,255,.72); font-size: 1.05rem; line-height: 1.8; }
.quality-points { display: grid; gap: 2px; }
.quality-points article { display: grid; grid-template-columns: 46px 1fr; gap: 18px; padding: 18px 0; border-top: 1px solid rgba(255,255,255,.14); }
.quality-points article > span { color: #8bc65b; font-weight: 800; }
.quality-points h3 { margin: 0; font-size: 1.05rem; }
.quality-points p { margin: 6px 0 0; color: rgba(255,255,255,.62); line-height: 1.6; font-size: .9rem; }
.source-note { margin: 22px 0 0; color: rgba(255,255,255,.47); font-size: .78rem; line-height: 1.6; }
.quality-media { position: relative; margin: 0; }
.quality-media img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: 26px; }
.quality-media figcaption { position: absolute; inset: auto 22px 22px; padding: 18px 20px; display: flex; justify-content: space-between; gap: 20px; color: var(--ink); background: rgba(255,255,255,.94); border-radius: 14px; box-shadow: var(--shadow); }
.quality-media figcaption strong, .quality-media figcaption span { display: block; }
.quality-media figcaption span { color: var(--muted); font-size: .83rem; }

.journey { padding: 100px 0; color: var(--white); background: linear-gradient(120deg, var(--blue-900), #0d5790); }
.journey-heading { display: grid; grid-template-columns: 1fr 2fr; gap: 18px 42px; align-items: end; }
.journey-heading .eyebrow { grid-row: 1; grid-column: 1; }
.journey-heading h2 { grid-row: 2; grid-column: 1; }
.journey-heading > p:last-child { grid-row: 2; grid-column: 2; margin: 0 0 7px; color: rgba(255,255,255,.66); }
.journey-steps { margin: 54px 0 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(5, 1fr); }
.journey-steps li { position: relative; display: grid; gap: 7px; padding-right: 24px; }
.journey-steps li:not(:last-child)::after { content: ""; position: absolute; left: 47px; right: 13px; top: 18px; height: 1px; background: rgba(255,255,255,.36); }
.journey-steps span { width: 36px; height: 36px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; font-size: .8rem; }
.journey-steps strong { margin-top: 8px; font-size: 1.08rem; }
.journey-steps small { color: rgba(255,255,255,.6); font-size: .83rem; }

.buy { background: linear-gradient(145deg, var(--cream), #fff); }
.buy-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 80px; align-items: center; }
.buy-intro > p:not(.eyebrow) { max-width: 530px; margin: 24px 0 30px; color: var(--muted); line-height: 1.8; }
.contact-card { display: inline-grid; gap: 7px; padding: 20px 24px; border-left: 4px solid var(--green-600); background: var(--white); box-shadow: 0 14px 36px rgba(30,50,70,.08); }
.contact-card span { color: var(--muted); font-size: .84rem; }
.contact-card a { color: var(--blue-900); font-size: 1.65rem; font-weight: 800; letter-spacing: .02em; }
.contact-card small { color: var(--muted); }
.buy-assistant { padding: 38px; background: var(--white); border: 1px solid #e7e1d5; border-radius: 26px; box-shadow: var(--shadow); }
.assistant-index { display: inline-block; margin-bottom: 10px; color: var(--green-600); font-size: .8rem; font-weight: 800; }
.assistant-head h3 { margin: 0 0 26px; font-size: 1.55rem; }
.buy-assistant form { display: grid; gap: 12px; }
.buy-assistant label { margin-top: 5px; font-size: .88rem; font-weight: 750; }
.buy-assistant select { width: 100%; height: 52px; padding: 0 15px; border: 1px solid #cfd8e2; border-radius: 10px; background: var(--white); color: var(--ink); font-size: 1rem; }
.button-blue { margin-top: 10px; border: 0; background: var(--blue-900); color: var(--white); cursor: pointer; }
.assistant-result { margin-top: 20px; padding: 18px; border-radius: 12px; background: var(--blue-100); color: var(--blue-950); line-height: 1.7; }
.assistant-result strong { display: block; margin-bottom: 4px; }
.assistant-result a { color: var(--blue-700); font-weight: 800; }

.knowledge { background: var(--white); }
.faq-layout { display: grid; grid-template-columns: 1fr 320px; gap: 60px; align-items: start; }
.faq-list details { border-top: 1px solid var(--line); }
.faq-list details:last-child { border-bottom: 1px solid var(--line); }
.faq-list summary { padding: 24px 44px 24px 0; cursor: pointer; list-style: none; position: relative; font-size: 1.08rem; font-weight: 750; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 20px; color: var(--blue-700); font-size: 1.5rem; font-weight: 400; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { margin: -7px 0 24px; padding-right: 48px; color: var(--muted); line-height: 1.8; }
.guide-card { padding: 32px; color: var(--white); background: var(--blue-900); border-radius: var(--radius); }
.guide-number { margin: 0; color: #87c85b; font-size: 3.6rem; font-weight: 900; line-height: 1; }
.guide-card h3 { margin: 11px 0 20px; font-size: 1.35rem; }
.guide-card ul { margin: 0 0 28px; padding: 0; list-style: none; color: rgba(255,255,255,.72); }
.guide-card li { padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,.13); }
.guide-card a { font-size: .9rem; font-weight: 800; }

.about { padding-block: 110px; background: #eef5fb; }
.about-layout { display: grid; grid-template-columns: 290px 1fr; gap: 80px; align-items: center; }
.about-mark { aspect-ratio: 1; display: grid; place-items: center; align-content: center; border-radius: 50%; color: var(--white); background: var(--blue-900); box-shadow: 0 24px 60px rgba(11,60,130,.2); }
.about-mark span { font-size: 6rem; font-weight: 900; line-height: 1; }
.about-mark small { margin-top: 8px; letter-spacing: .25em; color: rgba(255,255,255,.65); }
.about-copy > p:not(.eyebrow) { margin: 24px 0 30px; color: var(--muted); line-height: 1.9; }
.about-links { display: flex; flex-wrap: wrap; gap: 16px; }
.about-links a { padding-bottom: 6px; color: var(--blue-900); border-bottom: 2px solid var(--blue-900); font-weight: 750; }

.site-footer { padding: 72px 0 28px; color: rgba(255,255,255,.82); background: #061d3e; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 54px; }
.footer-logo { width: 165px; padding: 9px; background: var(--white); border-radius: 8px; }
.site-footer h2 { margin: 0 0 18px; color: var(--white); font-size: .96rem; }
.site-footer a, .site-footer p { display: block; margin: 0 0 11px; font-size: .87rem; line-height: 1.7; }
.site-footer a:hover { color: var(--white); }
.footer-muted { color: rgba(255,255,255,.5); }
.footer-bottom { margin-top: 54px; padding-top: 24px; display: flex; justify-content: space-between; gap: 20px; border-top: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.46); }
.footer-bottom p { margin: 0; }
.mobile-buy { display: none; }

.modal[hidden] { display: none; }
.modal { position: fixed; z-index: 60; inset: 0; display: grid; place-items: center; padding: 20px; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(3,18,39,.72); backdrop-filter: blur(5px); }
.modal-panel { position: relative; width: min(560px, 100%); max-height: calc(100vh - 40px); overflow-y: auto; padding: 42px; border-radius: 24px; background: var(--white); box-shadow: 0 30px 100px rgba(0,0,0,.3); }
.modal-panel h2 { margin: 0; font-size: 2rem; }
.modal-panel > p:not(.eyebrow) { color: var(--muted); line-height: 1.8; }
.modal-close { position: absolute; right: 18px; top: 14px; width: 40px; height: 40px; border: 0; border-radius: 50%; background: var(--blue-100); color: var(--blue-900); font-size: 1.6rem; cursor: pointer; }
.product-facts { margin: 26px 0; border-top: 1px solid var(--line); }
.product-facts div { padding: 15px 0; display: grid; grid-template-columns: 120px 1fr; gap: 16px; border-bottom: 1px solid var(--line); }
.product-facts dt { font-weight: 750; }
.product-facts dd { margin: 0; color: var(--muted); }

@media (max-width: 980px) {
  .site-nav { position: fixed; inset: 78px 16px auto; display: none; padding: 18px; flex-direction: column; align-items: stretch; gap: 0; background: var(--white); border: 1px solid var(--line); border-radius: 18px; box-shadow: var(--shadow); }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 14px; }
  .menu-toggle { display: block; margin-left: auto; }
  .header-cta { display: none; }
  .hero { min-height: 660px; }
  .hero-image { object-position: 64% center; }
  .hero-overlay { background: linear-gradient(90deg, rgba(5,31,70,.9), rgba(5,31,70,.45)); }
  .product-grid { grid-template-columns: repeat(2, 1fr); }
  .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 20px 0; }
  .trust-grid div:nth-child(2) { border-right: 0; }
  .quality-layout, .buy-layout { grid-template-columns: 1fr; gap: 50px; }
  .quality-media { order: -1; }
  .journey-heading { grid-template-columns: 1fr; }
  .journey-heading .eyebrow, .journey-heading h2, .journey-heading > p:last-child { grid-column: 1; grid-row: auto; }
  .faq-layout { grid-template-columns: 1fr; }
  .guide-card { display: grid; grid-template-columns: auto 1fr; gap: 0 22px; align-items: start; }
  .guide-card .guide-number { grid-row: 1 / 4; }
  .about-layout { grid-template-columns: 220px 1fr; gap: 50px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .container { width: min(100% - 28px, 1180px); }
  .header-inner { min-height: 68px; }
  .brand img { width: 145px; }
  .site-nav { top: 68px; }
  .hero { min-height: 690px; padding-top: 68px; }
  .hero-image { object-position: 69% center; }
  .hero-overlay { background: linear-gradient(90deg, rgba(5,31,70,.92), rgba(5,31,70,.62) 60%, rgba(5,31,70,.35)); }
  .hero-content { padding-block: 90px 100px; }
  .hero h1 { max-width: 330px; font-size: 3.45rem; }
  .hero-copy { max-width: 330px; font-size: 1rem; }
  .hero-actions { align-items: stretch; flex-direction: column; max-width: 260px; }
  .trust-strip { margin-top: -38px; }
  .trust-grid { padding: 22px 16px; }
  .trust-grid div { padding: 4px 14px; }
  .trust-grid span { font-size: .78rem; }
  .section { padding: 88px 0; }
  .section-heading { align-items: start; flex-direction: column; margin-bottom: 30px; }
  .product-grid { grid-template-columns: 1fr; }
  .quality-layout { gap: 36px; }
  .quality-media figcaption { position: static; margin-top: 12px; flex-direction: column; gap: 4px; }
  .journey { padding: 82px 0; }
  .journey-steps { grid-template-columns: 1fr; gap: 0; }
  .journey-steps li { min-height: 88px; padding-left: 58px; padding-right: 0; }
  .journey-steps span { position: absolute; left: 0; top: 0; }
  .journey-steps li:not(:last-child)::after { left: 18px; right: auto; top: 38px; bottom: 7px; width: 1px; height: auto; }
  .buy-assistant { padding: 26px 20px; }
  .faq-layout { gap: 34px; }
  .faq-list details p { padding-right: 10px; }
  .guide-card { display: block; }
  .about-layout { grid-template-columns: 1fr; gap: 38px; }
  .about-mark { width: 190px; }
  .about-mark span { font-size: 4.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 34px; }
  .footer-bottom { flex-direction: column; }
  .mobile-buy { position: fixed; z-index: 25; display: flex; align-items: center; justify-content: center; inset: auto 14px 14px; min-height: 50px; color: var(--white); background: var(--blue-900); border-radius: 999px; box-shadow: 0 12px 40px rgba(6,29,62,.35); font-weight: 800; }
  .modal-panel { padding: 36px 22px 26px; }
  .product-facts div { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}