:root {
  --ink: #14211b;
  --ink-2: #1e3027;
  --muted: #617168;
  --green: #087a55;
  --green-dark: #075e45;
  --mint: #dff7ea;
  --cream: #f5f3ea;
  --gold: #d6a94a;
  --line: #dbe4de;
  --page: #fbfcfa;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body { margin: 0; color: var(--ink); background: var(--page); font-family: "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif; text-rendering: optimizeLegibility; }
a { color: inherit; text-decoration: none; }
button, input, summary { font: inherit; }
::selection { color: #fff; background: var(--green); }

.top-note { min-height: 36px; padding: 8px 20px; color: #4f5f56; background: #f0eee4; border-bottom: 1px solid #e5e1d4; text-align: center; font-size: 12px; line-height: 1.6; }
.top-note span { margin-right: 10px; padding: 3px 7px; border-radius: 4px; color: #fff; background: var(--green); font-weight: 700; }
.site-header { height: 76px; max-width: 1180px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 750; letter-spacing: -.5px; }
.brand b { color: var(--green); }
.brand small { display: block; margin-top: 1px; color: #829087; font-size: 9px; font-weight: 600; letter-spacing: 2.2px; }
.brand-mark { width: 35px; height: 35px; border-radius: 10px 10px 10px 3px; display: grid; place-items: center; color: white; background: var(--green); font-family: Georgia, serif; box-shadow: 0 7px 15px rgba(8,122,85,.18); }
nav { display: flex; gap: 32px; color: #415048; font-size: 14px; }
nav a { position: relative; padding: 27px 0; }
nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 19px; height: 2px; background: var(--green); transition: right .2s ease; }
nav a:hover { color: var(--green); }
nav a:hover::after { right: 0; }
.header-cta { padding: 10px 18px; border: 1px solid #b8cdc1; border-radius: 999px; font-size: 14px; font-weight: 700; transition: .2s ease; }
.header-cta:hover { color: #fff; border-color: var(--green); background: var(--green); }

.hero { max-width: 1180px; min-height: 630px; margin: 0 auto; padding: 76px 24px 74px; display: grid; grid-template-columns: 1.08fr .72fr; align-items: center; gap: 86px; position: relative; overflow: visible; }
.hero::before { content: ""; position: absolute; width: 460px; height: 460px; right: -60px; top: 70px; border-radius: 50%; background: radial-gradient(circle, #dff7ea 0 31%, transparent 32% 47%, #edf8f1 48% 50%, transparent 51%); z-index: -1; opacity: .9; }
.eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green); font-size: 13px; font-weight: 800; letter-spacing: 1px; }
.eyebrow span { width: 24px; height: 2px; background: var(--gold); }
h1 { margin: 19px 0 22px; font-size: clamp(44px, 5.2vw, 70px); line-height: 1.08; letter-spacing: -3.5px; font-family: Georgia, "Songti SC", "STSong", serif; font-weight: 700; }
h1 em { color: var(--green); font-style: normal; }
.hero-lead { max-width: 650px; color: var(--muted); font-size: 17px; line-height: 1.85; }
.hero-actions { display: flex; gap: 24px; align-items: center; margin: 31px 0; }
.primary-btn { padding: 15px 22px; border-radius: 10px 10px 10px 3px; background: var(--green); color: #fff; font-weight: 750; box-shadow: 0 10px 24px rgba(8,122,85,.18); transition: .2s ease; }
.primary-btn:hover { background: var(--green-dark); transform: translateY(-2px); box-shadow: 0 15px 27px rgba(8,122,85,.24); }
.primary-btn span { margin-left: 14px; }
.text-btn { padding: 8px 0; color: var(--green-dark); border-bottom: 1px solid #9fb7aa; font-size: 14px; font-weight: 750; }
.hero-points { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 22px; color: #4d5f56; font-size: 13px; }
.check { flex: 0 0 auto; display: inline-grid; place-items: center; width: 19px; height: 19px; border-radius: 50%; background: var(--mint); color: var(--green); font-size: 12px; font-weight: 900; }

.service-preview { background: rgba(255,255,255,.96); border: 1px solid #d4e1d9; border-radius: 24px 24px 24px 7px; padding: 28px; box-shadow: 0 28px 70px rgba(31,62,47,.13); }
.preview-topline { display: flex; justify-content: space-between; align-items: center; color: #718077; font-size: 12px; }
.preview-topline span { text-transform: uppercase; letter-spacing: 1.3px; font-weight: 800; }
.preview-topline b { padding: 6px 10px; color: var(--green); background: var(--mint); border-radius: 999px; }
.product-sign { display: flex; align-items: center; gap: 14px; margin: 28px 0 24px; }
.product-logo { width: 49px; height: 49px; display: grid; place-items: center; border-radius: 15px 15px 15px 5px; color: white; background: var(--ink); font-family: Georgia, serif; font-weight: 800; }
.product-sign strong { display: block; font-size: 20px; }
.product-sign small { display: block; margin-top: 5px; color: #77837d; }
.price-row { display: flex; align-items: end; justify-content: space-between; color: #738078; font-size: 13px; }
.price-row strong { max-width: 190px; color: var(--ink); text-align: right; font-size: 15px; }
.preview-divider { height: 1px; margin: 20px 0; background: var(--line); }
.service-preview ul { display: grid; gap: 13px; list-style: none; padding: 0; color: #44534b; font-size: 14px; }
.service-preview li { display: flex; align-items: center; gap: 9px; }
.preview-button { display: block; margin-top: 22px; padding: 14px; color: white; background: var(--ink); border-radius: 10px; text-align: center; font-weight: 700; transition: .2s ease; }
.preview-button:hover { background: var(--green); }
.service-preview > p { margin: 15px 0 0; color: #89938e; text-align: center; font-size: 11px; }
.trust-strip { min-height: 104px; padding: 20px max(24px, calc((100vw - 1132px) / 2)); display: grid; grid-template-columns: repeat(4, 1fr); align-items: center; background: var(--cream); border-top: 1px solid #e9e5d7; border-bottom: 1px solid #e9e5d7; }
.trust-strip div { display: flex; align-items: baseline; gap: 9px; padding-left: 30px; border-left: 1px solid #dcd7c5; }
.trust-strip div:first-child { border-left: 0; }
.trust-strip strong { color: var(--green); font-family: Georgia, "Songti SC", serif; font-size: 25px; }
.trust-strip span { color: #69736d; font-size: 13px; }

.section { max-width: 1180px; margin: 0 auto; padding: 112px 24px; }
.section-kicker { display: block; margin-bottom: 12px; color: var(--green); font-size: 11px; font-weight: 800; letter-spacing: 2.6px; }
.section-kicker.light { color: #78cbaa; }
.section h2 { margin: 0; font-family: Georgia, "Songti SC", serif; font-size: clamp(32px, 3.2vw, 48px); line-height: 1.2; letter-spacing: -1.2px; }
.section-heading { margin-bottom: 47px; display: grid; grid-template-columns: 1.25fr .75fr; align-items: end; gap: 70px; }
.section-heading p { margin: 0; color: var(--muted); line-height: 1.8; font-size: 15px; }
.offer-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.offer-card { min-height: 458px; padding: 28px; display: flex; flex-direction: column; background: #fff; border: 1px solid var(--line); border-radius: 18px 18px 18px 5px; transition: .22s ease; }
.offer-card:hover { transform: translateY(-5px); border-color: #a9c8b8; box-shadow: 0 22px 50px rgba(22,61,42,.08); }
.offer-card.featured { border-top: 4px solid var(--green); padding-top: 25px; }
.offer-head { display: flex; align-items: center; justify-content: space-between; }
.offer-mark { width: 47px; height: 47px; display: grid; place-items: center; color: #fff; background: var(--ink); border-radius: 14px 14px 14px 4px; font-family: Georgia, serif; font-size: 13px; font-weight: 800; }
.featured .offer-mark { background: var(--green); }
.offer-badge { padding: 6px 9px; color: var(--green); background: #edf8f2; border-radius: 999px; font-size: 11px; font-weight: 750; }
.offer-card h3 { margin: 28px 0 8px; font-size: 21px; }
.offer-card > p { min-height: 48px; margin: 0; color: #77847d; font-size: 13px; line-height: 1.7; }
.offer-price { min-height: 63px; margin-top: 17px; display: flex; align-items: baseline; gap: 4px; color: var(--green); }
.offer-price > span { margin-right: auto; color: #8a958f; font-size: 12px; }
.offer-price strong { font-family: Georgia, "Songti SC", serif; font-size: 36px; line-height: 1; letter-spacing: -1px; }
.offer-price strong small { margin-right: 3px; font-family: inherit; font-size: 17px; }
.offer-price b { font-size: 12px; font-weight: 700; }
.offer-card ul { margin: 15px 0 24px; padding: 22px 0 0; display: grid; gap: 13px; list-style: none; border-top: 1px solid #edf0ed; color: #46554d; font-size: 14px; }
.offer-card li { display: flex; align-items: center; gap: 9px; }
.offer-card > a { margin-top: auto; display: flex; align-items: center; justify-content: space-between; color: var(--green-dark); font-size: 14px; font-weight: 750; }
.pricing-note { margin: 14px 2px 0; color: #829087; font-size: 11px; line-height: 1.7; }
.codex-note { margin-top: 22px; padding: 24px 27px; display: grid; grid-template-columns: auto 1fr auto; gap: 23px; align-items: center; background: #eff6f1; border: 1px solid #d7e6dc; border-radius: 14px; }
.note-index { width: 42px; height: 42px; display: grid; place-items: center; color: var(--green); border: 1px solid #afcdbd; border-radius: 50%; font-family: Georgia, serif; }
.codex-note strong { font-size: 15px; }
.codex-note p { margin: 6px 0 0; color: #64736b; font-size: 13px; line-height: 1.7; }
.codex-note > a { color: var(--green); white-space: nowrap; border-bottom: 1px solid #a9c5b6; font-size: 12px; font-weight: 700; }

.why-section { color: #eef7f2; background: var(--ink); }
.why-inner { display: grid; grid-template-columns: .72fr 1.28fr; gap: 86px; }
.why-title { position: sticky; top: 30px; align-self: start; }
.why-title p { color: #9fb0a7; line-height: 1.8; }
.why-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1px; background: #405148; border: 1px solid #405148; }
.why-grid article { min-height: 230px; padding: 28px; background: var(--ink-2); }
.why-grid article > span { color: #7fb49b; font-family: Georgia, serif; font-size: 13px; }
.why-grid h3 { margin: 47px 0 10px; color: #fff; font-size: 19px; }
.why-grid p { margin: 0; color: #a8b8af; font-size: 13px; line-height: 1.75; }

.center-heading { max-width: 730px; margin: 0 auto 58px; text-align: center; }
.center-heading > p { color: var(--muted); line-height: 1.8; }
.steps { margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 22px; list-style: none; counter-reset: steps; }
.steps li { padding: 27px; display: grid; grid-template-columns: auto 1fr; gap: 22px; background: #fff; border: 1px solid var(--line); border-radius: 15px; }
.steps li > span { width: 48px; height: 48px; display: grid; place-items: center; color: var(--green); background: var(--mint); border-radius: 50%; font-family: Georgia, serif; font-size: 20px; }
.steps small { color: var(--green); font-size: 11px; font-weight: 700; }
.steps h3 { margin: 5px 0 8px; font-size: 18px; }
.steps p { margin: 0; color: #75827b; font-size: 13px; line-height: 1.7; }

.security { padding-top: 15px; }
.security-card { padding: 55px; display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; background: var(--cream); border: 1px solid #e3decd; border-radius: 24px 24px 24px 7px; }
.security-copy p { color: #66726b; line-height: 1.85; }
.security-copy a { display: inline-block; margin-top: 15px; color: var(--green); font-size: 14px; font-weight: 750; }
.security-list { display: grid; gap: 1px; background: #dcd8ca; }
.security-list > div { padding: 21px; display: grid; grid-template-columns: 50px 1fr; gap: 16px; background: #f9f7ef; }
.security-list span { width: 42px; height: 42px; display: grid; place-items: center; color: var(--green); border: 1px solid #b5cbbc; border-radius: 50%; font-size: 11px; font-weight: 750; }
.security-list p { margin: 0; color: #707970; font-size: 13px; line-height: 1.7; }
.security-list strong { display: block; color: var(--ink); font-size: 15px; }

.faq-section { background: #f3f7f4; border-top: 1px solid #e3ebe6; }
.faq-inner { display: grid; grid-template-columns: .65fr 1.35fr; gap: 88px; }
.faq-aside { align-self: start; position: sticky; top: 30px; }
.faq-aside p { color: var(--muted); line-height: 1.8; }
.faq-aside a { display: inline-block; margin-top: 12px; padding-bottom: 7px; color: var(--green); border-bottom: 1px solid #a8c9b8; font-size: 13px; font-weight: 750; }
.faq-list details { border-bottom: 1px solid #cedbd3; }
.faq-list summary { padding: 23px 0; display: grid; grid-template-columns: 34px 1fr auto; align-items: center; gap: 10px; cursor: pointer; list-style: none; font-size: 16px; font-weight: 700; }
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary > span { color: #81948a; font-family: Georgia, serif; font-size: 12px; }
.faq-list summary i { width: 28px; height: 28px; display: grid; place-items: center; color: var(--green); background: #fff; border: 1px solid #cad9d1; border-radius: 50%; font-style: normal; font-weight: 400; transition: .2s ease; }
.faq-list details[open] summary i { color: #fff; background: var(--green); border-color: var(--green); transform: rotate(45deg); }
.faq-list details > p { margin: -4px 40px 24px 44px; color: #64736a; line-height: 1.85; font-size: 14px; }

.contact { padding-top: 85px; padding-bottom: 85px; }
.contact-card { padding: 52px 58px; display: grid; grid-template-columns: 1.25fr .75fr; align-items: center; gap: 70px; color: #fff; background: var(--green); border-radius: 25px 25px 25px 7px; overflow: hidden; position: relative; }
.contact-card::after { content: ""; position: absolute; width: 250px; height: 250px; right: -110px; top: -110px; border: 1px solid rgba(255,255,255,.25); border-radius: 50%; box-shadow: 0 0 0 38px rgba(255,255,255,.05), 0 0 0 76px rgba(255,255,255,.035); }
.contact-card h2 { color: #fff; }
.contact-card > div > p { max-width: 650px; color: #c8e8d9; line-height: 1.8; }
.contact-action { z-index: 1; padding: 15px; display: flex; align-items: center; gap: 14px; background: #fff; color: var(--ink); border-radius: 14px; }
.contact-action strong { display: block; }
.contact-action p { margin: 5px 0; color: #6d7972; font-size: 12px; }
.contact-action small { color: #a57022; font-size: 10px; }
.wechat-qr { width: 78px; height: 78px; flex: 0 0 auto; display: block; object-fit: contain; background: #fff; border: 5px solid #fff; outline: 1px solid #d5ddd8; }
.wechat-qr.large { width: 146px; height: 146px; margin: 0 auto; }

.floating-contact { width: 176px; padding: 14px; display: none; position: fixed; z-index: 20; right: 18px; top: 50%; transform: translateY(-45%); background: #fff; border: 1px solid #cfe0d6; border-radius: 16px 16px 16px 5px; box-shadow: 0 18px 45px rgba(22,49,35,.16); }
.float-label { margin-bottom: 10px; display: flex; align-items: center; gap: 7px; color: var(--green); font-size: 12px; font-weight: 800; }
.float-label span { width: 7px; height: 7px; background: #2abb7f; border-radius: 50%; box-shadow: 0 0 0 4px #e2f7ed; }
.floating-contact > p { margin: 12px 0 7px; color: #66746c; text-align: center; font-size: 11px; }
.floating-contact > a { display: block; padding: 8px; color: #fff; background: var(--green); border-radius: 7px; text-align: center; font-size: 11px; font-weight: 700; }
.mobile-contact { display: none; border: 0; font-family: inherit; cursor: pointer; }
.copy-toast { opacity: 0; pointer-events: none; position: fixed; z-index: 31; left: 50%; bottom: 78px; transform: translate(-50%, 8px); padding: 9px 14px; color: #fff; background: rgba(20,33,27,.94); border-radius: 999px; box-shadow: 0 8px 24px rgba(9,33,22,.2); white-space: nowrap; font-size: 12px; transition: opacity .2s ease, transform .2s ease; }
.copy-toast.show { opacity: 1; transform: translate(-50%, 0); }

footer { color: #c1cdc6; background: #101d17; }
.footer-inner { max-width: 1180px; margin: 0 auto; padding: 65px 24px 50px; display: grid; grid-template-columns: 1fr .45fr 1fr; gap: 70px; }
.footer-brand { color: #fff; }
.footer-inner > div > p { color: #88998f; line-height: 1.8; font-size: 12px; }
.footer-inner > div:nth-child(2) { display: flex; flex-direction: column; gap: 12px; }
.footer-inner > div:nth-child(2) a { color: #94a49b; font-size: 12px; }
.footer-inner strong { color: #fff; font-size: 13px; }
.copyright { padding: 20px; color: #728279; border-top: 1px solid #26352d; text-align: center; font-size: 11px; }

@media (min-width: 1260px) {
  .floating-contact { display: block; }
}

@media (max-width: 960px) {
  .hero { gap: 42px; grid-template-columns: 1fr .78fr; }
  h1 { font-size: 52px; }
  .why-inner { grid-template-columns: 1fr; gap: 45px; }
  .why-title, .faq-aside { position: static; }
  .faq-inner { gap: 48px; }
  .contact-card { gap: 30px; }
}

@media (max-width: 820px) {
  html { scroll-padding-top: 20px; }
  body { padding-bottom: 68px; }
  .top-note { text-align: left; padding-left: 18px; padding-right: 18px; }
  .site-header { height: 68px; padding: 0 18px; }
  nav { display: none; }
  .header-cta { padding: 9px 13px; }
  .hero { min-height: auto; padding: 55px 20px 58px; grid-template-columns: 1fr; gap: 42px; overflow: hidden; }
  .hero::before { width: 300px; height: 300px; right: -130px; top: 30px; }
  h1 { font-size: clamp(39px, 12vw, 58px); letter-spacing: -2px; }
  .hero-lead { font-size: 15px; line-height: 1.75; }
  .hero-actions { align-items: stretch; flex-direction: column; gap: 10px; }
  .primary-btn, .text-btn { text-align: center; }
  .hero-points { gap: 13px; display: grid; }
  .service-preview { padding: 23px; }
  .trust-strip { grid-template-columns: 1fr 1fr; gap: 20px; padding: 26px 20px; }
  .trust-strip div, .trust-strip div:first-child { border-left: 0; padding-left: 0; }
  .section { padding: 78px 20px; }
  .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .offer-grid { grid-template-columns: 1fr; }
  .offer-card { min-height: 430px; }
  .codex-note { grid-template-columns: auto 1fr; align-items: start; }
  .codex-note > a { grid-column: 2; width: fit-content; }
  .why-inner { gap: 35px; }
  .why-grid { grid-template-columns: 1fr; }
  .why-grid article { min-height: 190px; }
  .why-grid h3 { margin-top: 28px; }
  .steps { grid-template-columns: 1fr; }
  .security { padding-top: 0; }
  .security-card { padding: 30px 22px; grid-template-columns: 1fr; gap: 35px; }
  .security-list > div { padding: 17px; grid-template-columns: 44px 1fr; }
  .faq-inner { grid-template-columns: 1fr; gap: 28px; }
  .faq-list summary { padding: 20px 0; font-size: 15px; }
  .faq-list details > p { margin-left: 44px; margin-right: 10px; }
  .contact { padding: 55px 20px; }
  .contact-card { padding: 34px 24px; grid-template-columns: 1fr; }
  .footer-inner { padding: 52px 20px 40px; grid-template-columns: 1fr; gap: 35px; }
  .mobile-contact { width: 100%; height: 68px; padding: 8px 18px; display: flex; align-items: center; justify-content: space-between; position: fixed; z-index: 30; left: 0; right: 0; bottom: 0; color: #fff; background: var(--green); box-shadow: 0 -7px 20px rgba(10,55,38,.15); text-align: left; }
  .mobile-contact:active { background: var(--green-dark); }
  .mobile-contact:focus-visible { outline: 3px solid var(--gold); outline-offset: -4px; }
  .mobile-wechat-info { display: flex; flex-direction: column; gap: 2px; }
  .mobile-wechat-info > span { color: #c8eadb; font-size: 11px; font-weight: 600; }
  .mobile-wechat-info small { color: #e2f5ec; font-size: 11px; }
  .mobile-wechat-info small b { color: #fff; font-size: 14px; letter-spacing: .25px; }
  .mobile-contact > strong { padding: 9px 13px; color: var(--green-dark); background: #fff; border-radius: 8px; font-size: 13px; line-height: 1; }
}

@media (max-width: 420px) {
  .brand { font-size: 18px; }
  .brand-mark { width: 32px; height: 32px; }
  .header-cta { font-size: 12px; }
  .price-row { align-items: start; flex-direction: column; gap: 7px; }
  .price-row strong { text-align: left; }
  .trust-strip strong { font-size: 22px; }
  .trust-strip div { flex-direction: column; gap: 2px; }
  .section h2 { font-size: 34px; }
  .codex-note { grid-template-columns: 1fr; }
  .codex-note > a { grid-column: 1; }
  .steps li { padding: 21px; grid-template-columns: 40px 1fr; gap: 15px; }
  .steps li > span { width: 40px; height: 40px; }
  .contact-action { align-items: flex-start; }
  .contact-action .wechat-qr { width: 70px; height: 70px; }
  .mobile-contact { padding-left: 14px; padding-right: 14px; }
  .mobile-contact > strong { padding: 9px 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}