:root {
  color-scheme: light;
  --ink: #102534;
  --ink-soft: #475d67;
  --paper: #f7f9f7;
  --white: #ffffff;
  --line: #dbe4e5;
  --mint: #a9e9e2;
  --mint-strong: #2a9d9c;
  --blue-pale: #e7f3f4;
  --display: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body: "Avenir Next", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--body); font-size: 1rem; line-height: 1.65; -webkit-font-smoothing: antialiased; }
button, input { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; }
img { max-width: 100%; }
:focus-visible { outline: 3px solid #3a9fa3; outline-offset: 4px; }
.skip-link { position: fixed; z-index: 1000; top: -100px; left: 1rem; padding: .65rem 1rem; background: var(--mint); color: var(--ink); border-radius: .25rem; }
.skip-link:focus { top: 1rem; }
.content-width { width: min(100% - 3rem, 1240px); margin-inline: auto; }

.announcement { min-height: 2.75rem; display: flex; justify-content: center; align-items: center; gap: .8rem; padding: .45rem 1rem; background: var(--ink); color: #e9f4f3; font-size: .83rem; font-weight: 600; letter-spacing: .04em; text-align: center; }
.announcement a { color: var(--mint); border-bottom: 1px solid currentColor; line-height: 1.35; }
.announcement-separator { width: 1px; height: 13px; background: #6e878b; }
.site-header { height: 5.25rem; width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 2rem; padding-inline: max(1.5rem, calc((100vw - 1240px) / 2)); background: rgba(247,249,247,.96); border-bottom: 1px solid var(--line); position: relative; z-index: 20; }
.brand { display: inline-flex; align-items: center; gap: .7rem; min-width: 9.5rem; }
.brand-mark { width: 2.55rem; height: 2.55rem; display: grid; place-items: center; background: var(--ink); color: var(--mint); border-radius: .65rem; font-size: 1.25rem; font-weight: 800; line-height: 1; }
.brand-words { display: grid; line-height: 1.1; }
.brand-words strong { font-size: 1.17rem; letter-spacing: .15em; }
.brand-words small { margin-top: .2rem; color: #587078; font-family: var(--display); font-size: .58rem; font-weight: 800; letter-spacing: .26em; }
.desktop-nav { display: flex; align-items: center; gap: 2.3rem; }
.desktop-nav a { font-size: .91rem; font-weight: 650; transition: color .2s ease; }
.desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--mint-strong); }
.header-actions { display: flex; align-items: center; gap: 1rem; }
.language-switch { min-width: 3.25rem; height: 2.5rem; padding: 0 .55rem; border: 1px solid #bdd0d1; border-radius: 100px; background: transparent; color: var(--ink); font-size: .85rem; font-weight: 800; letter-spacing: .05em; }
.language-switch:hover { background: #eaf3f2; }
.header-cta { display: inline-flex; align-items: center; justify-content: center; min-height: 2.6rem; padding: .5rem 1.35rem; background: var(--ink); color: white; border-radius: 100px; font-size: .88rem; font-weight: 700; white-space: nowrap; }
.header-cta:hover { background: #224558; }

.hero { background: linear-gradient(120deg, #f7f9f7 0%, #f7f9f7 54%, #e7f2f2 100%); overflow: hidden; }
.hero-inner { width: min(100% - 3rem, 1350px); margin-inline: auto; min-height: 39rem; display: grid; grid-template-columns: minmax(0, .98fr) minmax(0, 1.02fr); align-items: stretch; }
.hero-copy { display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: 5rem 4.2rem 5rem max(0rem, calc((1350px - 1240px) / 2)); }
.eyebrow { display: flex; align-items: center; gap: .75rem; color: #317b80; font-size: .78rem; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow-line { width: 1.7rem; height: 1px; background: #317b80; }
h1, h2, h3, p { margin-top: 0; }
.hero h1 { margin: 1.55rem 0 1.5rem; font-family: var(--display); font-size: clamp(3.15rem, 5.15vw, 5.2rem); font-weight: 750; line-height: 1.14; letter-spacing: -.06em; }
.hero h1 span, .hero h1 em { display: block; }
.hero h1 em { margin-top: 1.3rem; font-size: clamp(1.55rem, 2.55vw, 2.45rem); font-style: normal; font-weight: 600; letter-spacing: -.055em; line-height: 1.28; }
.hero-description { max-width: 31rem; margin-bottom: 1.85rem; color: var(--ink-soft); font-size: 1.08rem; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 3.2rem; padding: .65rem 1.4rem; border: 1px solid transparent; border-radius: .35rem; font-size: .95rem; font-weight: 750; text-align: center; transition: background .2s ease, transform .2s ease, border-color .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--ink); color: var(--white); }
.button-primary:hover { background: #22495a; }
.button-outline { border-color: #a5bbbd; color: var(--ink); background: rgba(255,255,255,.36); }
.button-outline:hover { border-color: var(--ink); background: white; }
.hero-note { margin: 1rem 0 0; color: #677a80; font-size: .86rem; }
.hero-media { min-height: 38rem; position: relative; background: #dbe5e8 url("assets/hero.jpg") 65% center / cover no-repeat; overflow: hidden; }
.hero-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, rgba(245,249,249,.1), transparent 40%, rgba(16,37,52,.06)); pointer-events: none; }
.hero-media-overlay { position: absolute; z-index: 1; right: 2rem; bottom: 2rem; min-width: 12rem; display: grid; gap: .18rem; padding: 1.05rem 1.2rem; background: rgba(16,37,52,.88); color: white; backdrop-filter: blur(12px); border: 1px solid rgba(255,255,255,.17); }
.hero-media-overlay span:first-child { color: var(--mint); font-size: .76rem; font-weight: 700; letter-spacing: .09em; }
.hero-media-overlay strong { font-size: 1.55rem; line-height: 1.3; }
.hero-media-overlay span:last-child { color: #d3e1e2; font-size: .75rem; }
.hero-rule { display: flex; gap: .3rem; width: min(100% - 3rem, 1240px); margin: auto; padding: .9rem 0 1.15rem; }
.hero-rule span { width: 1.4rem; height: .2rem; border-radius: 2px; background: #c5d9d9; }
.hero-rule span:first-child { width: 3.3rem; background: var(--ink); }

.quick-facts { background: white; border-bottom: 1px solid var(--line); }
.fact-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.fact { min-height: 8.7rem; display: grid; align-content: center; padding: 1.15rem 2.15rem; position: relative; }
.fact:first-child { padding-left: 0; }
.fact:not(:last-child)::after { content: ""; position: absolute; right: 0; top: 1.8rem; bottom: 1.8rem; width: 1px; background: var(--line); }
.fact-index { position: absolute; right: 2rem; top: 1.25rem; color: #a5b7bb; font-size: .75rem; font-weight: 800; }
.fact-label { color: #71858b; font-size: .78rem; font-weight: 700; letter-spacing: .08em; }
.fact strong { margin-top: .3rem; font-size: clamp(1.12rem, 1.6vw, 1.55rem); letter-spacing: -.03em; }

.section { padding-block: 7rem; }
.section-heading { max-width: 32rem; }
.kicker { display: inline-block; margin-bottom: 1.15rem; color: #297f83; font-size: .78rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.section h2, .order-section h2 { margin-bottom: 1.3rem; font-family: var(--display); font-size: clamp(2.25rem, 3.2vw, 3.45rem); font-weight: 740; line-height: 1.26; letter-spacing: -.055em; }
.section-heading p { margin-bottom: 0; color: var(--ink-soft); font-size: 1rem; line-height: 1.9; }
.detail-section { background: var(--paper); }
.detail-layout { display: grid; grid-template-columns: .85fr 1.15fr; align-items: start; gap: clamp(3rem, 8vw, 8rem); }
.info-panel { background: white; border: 1px solid #d9e3e3; box-shadow: 0 22px 50px rgba(29,67,74,.07); }
.panel-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1.2rem 1.5rem; border-bottom: 1px solid var(--line); font-size: 1.03rem; font-weight: 800; }
.panel-badge { padding: .25rem .7rem; border-radius: 100px; background: #eaf4f2; color: #287a79; font-size: .72rem; font-weight: 800; white-space: nowrap; }
.info-list { margin: 0; padding: 0 1.5rem; }
.info-list div { display: grid; grid-template-columns: 8.6rem 1fr; align-items: start; gap: .9rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.info-list dt { color: #667b82; font-size: .9rem; }
.info-list dd { margin: 0; font-size: .93rem; font-weight: 700; text-align: right; }
.info-list .info-pending dd { color: #688086; font-weight: 500; }
.text-link { display: inline-block; margin: 1.15rem 1.5rem 1.4rem; color: #176f74; border-bottom: 1px solid currentColor; font-size: .93rem; font-weight: 750; }

.pricing-section { background: #e8f2f2; }
.pricing-layout { display: grid; grid-template-columns: 1fr .9fr; align-items: center; gap: clamp(3rem, 8vw, 9rem); }
.unit-price { display: grid; gap: .1rem; width: fit-content; min-width: 17rem; margin-top: 2rem; padding: 1.15rem 1.4rem; border-left: 3px solid #2f9294; background: rgba(255,255,255,.64); }
.unit-price span:first-child { color: #597177; font-size: .8rem; font-weight: 700; }
.unit-price strong { font-size: 1.9rem; line-height: 1.3; }
.unit-price small { font-size: .92rem; font-weight: 600; }
.unit-price span:last-child { color: #6c7f85; font-size: .74rem; }
.calculator { background: var(--ink); color: white; box-shadow: 0 24px 55px rgba(6,45,60,.18); }
.calculator-top { display: flex; align-items: center; justify-content: space-between; padding: 1.3rem 1.7rem; border-bottom: 1px solid rgba(255,255,255,.18); }
.calculator-kicker { color: var(--mint); font-size: .85rem; font-weight: 800; letter-spacing: .08em; }
.calculator-label { color: #acc5c6; font-size: .79rem; }
.calculator-body { padding: 1.7rem; }
.calculator-body label { display: block; margin-bottom: .7rem; color: #cadbdd; font-size: .9rem; font-weight: 700; }
.stepper { display: flex; align-items: center; justify-content: space-between; width: 11rem; height: 3.2rem; margin-bottom: 1.5rem; border: 1px solid #55727b; }
.stepper button { width: 3.3rem; height: 100%; border: 0; background: transparent; color: white; font-size: 1.45rem; }
.stepper button:hover { background: rgba(255,255,255,.12); }
.stepper output { min-width: 2rem; text-align: center; font-size: 1.06rem; font-weight: 800; }
.calculation-line { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding: .7rem 0; color: #cbdcdd; border-bottom: 1px solid rgba(255,255,255,.13); font-size: .92rem; }
.calculation-line strong { color: white; font-size: 1.05rem; }
.calculation-total { margin-top: .4rem; color: white; border-bottom: 0; font-weight: 800; }
.calculation-total strong { font-size: 2rem; line-height: 1.4; }
.calculation-note { margin: .4rem 0 1.35rem; color: #bbcbce; font-size: .78rem; }
.button-full { width: 100%; }
.calculator .button-primary { background: var(--mint); color: var(--ink); }
.calculator .button-primary:hover { background: #d0f5ee; }

.steps-section { background: white; }
.steps-header { max-width: 40rem; margin-bottom: 2.8rem; }
.steps-header h2 { margin-bottom: 0; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.step-card { min-height: 14rem; padding: 1.6rem; background: #f4f8f7; border: 1px solid #e1eae8; }
.step-number { display: block; margin-bottom: 2.3rem; color: #3c8d8f; font-family: var(--display); font-size: 1.15rem; font-weight: 800; }
.step-card h3 { margin-bottom: .45rem; font-size: 1.17rem; }
.step-card p { margin-bottom: 0; color: #526a70; font-size: .91rem; line-height: 1.75; }

.faq-section { background: var(--paper); }
.faq-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(3rem, 8vw, 8rem); }
.faq-list { border-top: 1px solid #cddada; }
.faq-list details { border-bottom: 1px solid #cddada; }
.faq-list summary { list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; padding: 1.35rem .2rem; font-size: 1rem; font-weight: 750; cursor: pointer; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after { content: "+"; flex: 0 0 auto; color: #388a8b; font-size: 1.45rem; font-weight: 400; line-height: 1; }
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 39rem; margin: -.2rem 0 1.45rem; color: #526970; line-height: 1.85; }

.order-section { padding-block: 6rem; background: #102534; color: white; }
.order-layout { display: grid; grid-template-columns: 1fr .7fr; align-items: center; gap: clamp(3rem, 8vw, 8rem); }
.kicker-light { color: var(--mint); }
.order-section h2 { max-width: 32rem; }
.order-section p { max-width: 34rem; margin-bottom: 0; color: #b9d1d3; font-size: 1rem; line-height: 1.85; }
.wechat-card { display: grid; justify-items: start; padding: 2rem; background: #1b3946; border: 1px solid #54727a; }
.wechat-card > span { color: #bad3d3; font-size: .86rem; }
.wechat-card strong { display: block; margin: .3rem 0 1.4rem; font-size: clamp(1.9rem, 3vw, 2.7rem); font-weight: 750; letter-spacing: .01em; line-height: 1.2; overflow-wrap: anywhere; }
.button-mint { min-width: 11rem; background: var(--mint); color: var(--ink); }
.button-mint:hover { background: #d4f6f0; }
.message-link { margin-top: .8rem; padding: .35rem 0; border: 0; border-bottom: 1px solid #b0d5d5; background: transparent; color: #d4e9e9; font-size: .88rem; font-weight: 650; }
.message-link:hover { color: white; }
.site-footer { background: #0a1c29; color: #b6c9cc; }
.footer-layout { display: grid; grid-template-columns: .5fr 2fr auto; align-items: start; gap: 3rem; padding-block: 2.5rem; }
.footer-brand { display: grid; gap: .15rem; line-height: 1; }
.footer-brand strong { color: white; font-size: 1.2rem; letter-spacing: .1em; }
.footer-brand span { font-size: .67rem; font-weight: 750; letter-spacing: .2em; }
.footer-layout p { max-width: 43rem; margin: 0; font-size: .78rem; line-height: 1.85; }
.footer-layout > span { white-space: nowrap; font-size: .76rem; }
.toast { position: fixed; z-index: 50; bottom: 1.5rem; left: 50%; transform: translate(-50%, 5rem); padding: .65rem 1rem; background: var(--ink); color: white; border-radius: .25rem; box-shadow: 0 15px 30px rgba(4,36,45,.2); opacity: 0; pointer-events: none; transition: transform .25s ease, opacity .25s ease; text-align: center; font-size: .9rem; }
.toast.show { transform: translate(-50%, 0); opacity: 1; }

@media (max-width: 950px) {
  .site-header { gap: 1rem; }
  .desktop-nav { gap: 1rem; }
  .hero-inner { width: 100%; grid-template-columns: 1fr .9fr; }
  .hero-copy { padding: 4rem 2rem; }
  .hero-media { min-height: 34rem; }
  .detail-layout, .pricing-layout, .faq-layout { gap: 3rem; }
}

@media (max-width: 720px) {
  .content-width { width: min(100% - 2rem, 1240px); }
  .announcement { font-size: .72rem; }
  .site-header { height: 4.6rem; padding-inline: 1rem; }
  .desktop-nav { display: none; }
  .brand { min-width: 0; }
  .brand-mark { width: 2.25rem; height: 2.25rem; }
  .header-actions { gap: .5rem; }
  .header-cta { padding: .5rem .85rem; font-size: .79rem; }
  .language-switch { min-width: 2.7rem; height: 2.3rem; font-size: .77rem; }
  .hero-inner { width: 100%; grid-template-columns: 1fr; }
  .hero-copy { padding: 4.2rem 1rem 3.5rem; }
  .hero h1 { margin-top: 1.3rem; font-size: clamp(2.8rem, 12vw, 4.4rem); }
  .hero h1 em { font-size: clamp(1.55rem, 6vw, 2.1rem); }
  .hero-description { font-size: 1rem; }
  .hero-media { min-height: 24rem; }
  .hero-media-overlay { right: 1rem; bottom: 1rem; }
  .hero-rule { width: calc(100% - 2rem); }
  .fact-grid { grid-template-columns: 1fr; }
  .fact { min-height: 5.8rem; padding: .8rem 0; border-bottom: 1px solid var(--line); }
  .fact:last-child { border-bottom: 0; }
  .fact:not(:last-child)::after { display: none; }
  .fact-index { right: 0; top: 1rem; }
  .section { padding-block: 4.5rem; }
  .detail-layout, .pricing-layout, .faq-layout, .order-layout { grid-template-columns: 1fr; gap: 2.2rem; }
  .steps-grid { grid-template-columns: 1fr; gap: .85rem; }
  .step-card { min-height: 0; padding: 1.35rem; }
  .step-number { margin-bottom: 1.25rem; }
  .order-section { padding-block: 4.5rem; }
  .footer-layout { grid-template-columns: 1fr; gap: 1.4rem; padding-block: 2.2rem; }
}

@media (max-width: 400px) {
  .brand-words strong { font-size: 1.03rem; }
  .brand-words small { font-size: .52rem; }
  .brand-mark { width: 2rem; height: 2rem; font-size: 1rem; }
  .header-cta { padding-inline: .65rem; }
  .hero-actions { width: 100%; }
  .hero-actions .button { flex: 1 1 100%; }
  .info-list div { grid-template-columns: 6.4rem 1fr; }
}

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