:root {
  --ink: #10231d;
  --muted: #5d6f68;
  --paper: #f6f5ef;
  --panel: #ffffff;
  --line: #dce2dc;
  --green: #087f5b;
  --green-dark: #056345;
  --mint: #dff5e9;
  --lime: #c5ee75;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(circle at 90% 5%, rgba(197, 238, 117, .22), transparent 24rem), var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
}

a { color: inherit; }
img { display: block; max-width: 100%; }
.shell { width: min(1120px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(16, 35, 29, .08);
  background: rgba(246, 245, 239, .88);
  backdrop-filter: blur(16px);
}

.nav-wrap { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; }
.brand img { border-radius: 10px; box-shadow: 0 6px 16px rgba(8, 127, 91, .18); }
.brand span { display: grid; line-height: 1.05; }
.brand strong { font-size: 15px; }
.brand small { margin-top: 5px; color: var(--muted); font-size: 10px; letter-spacing: .08em; }
nav { display: flex; gap: 6px; }
nav a { padding: 8px 12px; border-radius: 999px; color: var(--muted); font-size: 14px; text-decoration: none; }
nav a:hover, nav a:focus-visible, nav a[aria-current="page"] { background: var(--mint); color: var(--green-dark); outline: none; }
.language-link { margin-left: 4px; border: 1px solid rgba(8, 127, 91, .22); color: var(--green-dark); font-weight: 700; }

.eyebrow { margin: 0 0 14px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .16em; }
.hero { min-height: 640px; display: grid; grid-template-columns: 1.3fr .7fr; align-items: center; gap: 70px; padding-block: 90px; }
h1 { margin: 0; font-size: clamp(48px, 7vw, 86px); line-height: 1.03; letter-spacing: -.055em; }
.hero h1 span { color: var(--green); }
.lead { max-width: 650px; margin: 28px 0 0; color: var(--muted); font-size: clamp(18px, 2vw, 22px); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.button { display: inline-flex; justify-content: center; align-items: center; min-height: 48px; padding: 10px 20px; border-radius: 14px; font-weight: 700; text-decoration: none; }
.button:focus-visible { outline: 3px solid rgba(8, 127, 91, .28); outline-offset: 3px; }
.primary { background: var(--green); color: #fff; box-shadow: 0 12px 30px rgba(8, 127, 91, .24); }
.primary:hover { background: var(--green-dark); }
.secondary { border: 1px solid var(--line); background: rgba(255, 255, 255, .7); }

.summary-card, .contact-card {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(8, 127, 91, .14);
  border-radius: 28px;
  background: var(--panel);
  padding: 32px;
  box-shadow: 0 24px 65px rgba(21, 55, 43, .11);
}

.summary-card::after, .contact-card::after { position: absolute; top: -80px; right: -70px; width: 180px; height: 180px; border-radius: 50%; background: var(--lime); content: ""; opacity: .35; }
.large-icon { position: relative; z-index: 1; border-radius: 22%; }
.card-label { margin: 26px 0 6px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.summary-card h2, .contact-card h2 { margin: 0; font-size: 27px; line-height: 1.25; }
.check-list { display: grid; gap: 10px; margin: 24px 0 0; padding: 0; list-style: none; }
.check-list li::before { display: inline-grid; place-items: center; width: 22px; height: 22px; margin-right: 10px; border-radius: 50%; background: var(--mint); color: var(--green); content: "✓"; font-size: 12px; font-weight: 900; }

.product-tour { padding-block: 92px 110px; }
.section-heading { max-width: 760px; margin-bottom: 42px; }
.section-heading h2 { margin: 0; font-size: clamp(36px, 5vw, 58px); line-height: 1.08; letter-spacing: -.045em; }
.section-heading > p:last-child { max-width: 690px; margin: 20px 0 0; color: var(--muted); font-size: 18px; }
.screen-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; align-items: start; }
.phone-card { min-width: 0; }
.featured-phone { transform: translateY(-20px); }
.screen-label { display: flex; align-items: center; gap: 10px; margin: 0 0 12px; color: var(--muted); font-size: 13px; font-weight: 750; letter-spacing: .04em; text-transform: uppercase; }
.screen-label b { display: grid; place-items: center; width: 29px; height: 29px; border-radius: 50%; background: var(--ink); color: #fff; font-size: 11px; }
.phone-screen { min-height: 570px; overflow: hidden; border: 8px solid #15211d; border-radius: 38px; background: #f7f7f9; padding: 14px 16px 20px; box-shadow: 0 24px 52px rgba(17, 38, 31, .16); color: #17211d; font-size: 13px; }
.phone-status { display: flex; justify-content: space-between; margin: 0 6px 23px; font-size: 10px; font-weight: 800; }
.welcome-screen { display: flex; align-items: center; flex-direction: column; }
.welcome-screen > img { margin-top: 25px; border-radius: 18px; }
.welcome-screen > h3 { margin: 13px 0 30px; font-size: 22px; }
.welcome-list { display: grid; gap: 20px; width: 100%; margin: 0; padding: 0; list-style: none; }
.welcome-list li { display: grid; grid-template-columns: 40px 1fr; gap: 12px; align-items: center; }
.welcome-list i { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; font-style: normal; font-size: 20px; font-weight: 800; }
.welcome-list i.blue { background: #e3efff; color: #1877f2; }
.welcome-list i.green { background: #e0f6e9; color: #16875f; }
.welcome-list i.orange { background: #fff0db; color: #d67708; }
.welcome-list span { display: grid; }
.welcome-list b { font-size: 13px; }
.welcome-list small { margin-top: 2px; color: #6d7672; font-size: 10px; line-height: 1.35; }
.mock-button { display: grid; place-items: center; width: 100%; min-height: 42px; margin-top: auto; border-radius: 10px; background: #087fef; color: #fff; font-weight: 800; }
.mock-toolbar { display: flex; justify-content: space-between; align-items: center; color: #087fef; font-size: 11px; }
.library-screen > h3 { margin: 10px 0 14px; font-size: 28px; letter-spacing: -.04em; }
.video-row { display: grid; grid-template-columns: 68px minmax(0, 1fr) 8px; gap: 10px; align-items: center; border-top: 1px solid #e2e5e3; padding: 12px 0; }
.video-row > span:nth-child(2) { display: grid; min-width: 0; }
.video-row b { overflow: hidden; font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.video-row small { margin-top: 4px; color: #717a76; font-size: 9px; white-space: nowrap; }
.video-row em { border-radius: 3px; background: #dcebff; color: #1375d1; padding: 2px 4px; font-style: normal; font-weight: 800; }
.video-row > i { color: #9ba29f; font-size: 18px; font-style: normal; }
.mock-thumb { width: 68px; height: 50px; border-radius: 7px; }
.mock-thumb.sea { background: linear-gradient(150deg, #d6f1ef 0 38%, #2e8e98 39% 67%, #e8be76 68%); }
.mock-thumb.night { background: linear-gradient(145deg, #141e38, #5b6c99 58%, #f09b60); }
.mock-thumb.field { background: linear-gradient(155deg, #9bd2ef 0 48%, #83ad50 49% 74%, #d8c58a 75%); }
.local-note { margin: 28px 0 0; border-radius: 9px; background: var(--mint); color: var(--green-dark); padding: 9px; font-size: 9px; font-weight: 700; text-align: center; }
.settings-title { position: relative; display: flex; justify-content: center; margin-bottom: 25px; color: #087fef; font-size: 10px; }
.settings-title span { position: absolute; left: 0; }
.settings-title b { color: #17211d; font-size: 12px; }
.form-label { margin: 16px 4px 5px; color: #777f7b; font-size: 8px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.setting-row { display: flex; justify-content: space-between; align-items: center; min-height: 41px; border-radius: 10px; background: #fff; padding: 9px 11px; }
.setting-row b { font-size: 10px; }
.mock-slider { height: 5px; margin: 17px 5px; border-radius: 999px; background: linear-gradient(to right, #087fef 0 38%, #d8dcda 38%); }
.mock-slider span { display: block; width: 16px; height: 16px; transform: translate(92px, -5px); border-radius: 50%; background: #fff; box-shadow: 0 2px 7px #8e9692; }
.codec-control { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; margin: 16px 0; border-radius: 9px; background: #e5e8e6; padding: 3px; text-align: center; }
.codec-control b, .codec-control span { border-radius: 7px; padding: 7px 4px; font-size: 9px; }
.codec-control b { background: #fff; box-shadow: 0 1px 4px rgba(0, 0, 0, .12); }
.mock-switch { display: flex; justify-content: flex-end; width: 34px; border-radius: 999px; background: #29bf64; color: #fff; padding: 1px 3px; font-style: normal; }
.estimate-box { display: grid; grid-template-columns: 1fr auto; gap: 3px; margin: 16px 0; border-radius: 10px; background: #fff; padding: 11px; }
.estimate-box b { font-size: 11px; }
.estimate-box small { grid-column: 1 / -1; color: var(--green); font-size: 9px; }
.guide-callout { display: flex; align-items: center; justify-content: space-between; gap: 40px; margin-top: 52px; border-radius: 24px; background: var(--ink); color: #fff; padding: 36px 40px; }
.guide-callout .eyebrow { color: var(--lime); }
.guide-callout h3 { margin: 0; font-size: 28px; }
.guide-callout p:last-child { margin: 7px 0 0; color: #cbd7d2; }
.guide-callout .button { flex: 0 0 auto; background: var(--lime); color: var(--ink); box-shadow: none; }

.features { padding-block: 80px 110px; }
.features > h2, .faq > h2, .english-support h2 { margin: 0 0 36px; font-size: clamp(34px, 4.5vw, 52px); line-height: 1.12; letter-spacing: -.04em; }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature-grid article { border-top: 4px solid var(--green); border-radius: 4px 4px 20px 20px; background: rgba(255, 255, 255, .72); padding: 28px; }
.feature-grid b { color: var(--green); font-family: ui-monospace, monospace; font-size: 13px; }
.feature-grid h3 { margin: 34px 0 8px; font-size: 23px; }
.feature-grid p { margin: 0; color: var(--muted); }

.page-heading { max-width: 820px; padding: 76px 0 60px; }
.page-heading h1 { font-size: clamp(50px, 7vw, 80px); }
.page-heading > p:not(.eyebrow) { max-width: 700px; margin: 22px 0; color: var(--muted); font-size: 20px; }
.page-meta { display: flex; flex-wrap: wrap; gap: 12px 24px; color: var(--muted); font-size: 14px; }
.page-meta a, .legal-copy a, .english-support a { color: var(--green-dark); font-weight: 650; text-underline-offset: 3px; }

.legal { padding-bottom: 100px; }
.legal-grid { display: grid; grid-template-columns: 280px minmax(0, 720px); justify-content: space-between; gap: 68px; align-items: start; }
.privacy-facts { position: sticky; top: 104px; border-radius: 20px; background: var(--mint); padding: 24px; }
.privacy-facts h2 { margin: 0 0 14px; font-size: 18px; }
.privacy-facts dl { margin: 0; }
.privacy-facts dl div { display: flex; justify-content: space-between; gap: 14px; border-top: 1px solid rgba(8, 127, 91, .18); padding: 10px 0; }
.privacy-facts dt { color: var(--muted); }
.privacy-facts dd { margin: 0; color: var(--green-dark); font-weight: 800; }
.legal-copy section { scroll-margin-top: 94px; margin-bottom: 40px; }
.legal-copy h2 { margin: 0 0 10px; font-size: 27px; line-height: 1.3; }
.legal-copy h3 { margin: 30px 0 7px; font-size: 21px; }
.legal-copy p { margin: 0 0 12px; color: #3d514a; }
.legal-copy hr { height: 1px; margin: 70px 0; border: 0; background: var(--line); }
.english-section > h2 { font-size: 38px; }

.support-hero { display: grid; grid-template-columns: 1.2fr .8fr; align-items: center; gap: 70px; padding-block: 84px 90px; }
.support-hero h1 { font-size: clamp(48px, 6.2vw, 74px); }
.contact-card > p:not(.card-label) { color: var(--muted); }
.contact-card .button { width: 100%; margin: 12px 0 8px; }
.contact-card small { display: block; color: var(--muted); text-align: center; }
.faq { padding-block: 75px 92px; }
.faq details { border-top: 1px solid var(--line); }
.faq details:last-child { border-bottom: 1px solid var(--line); }
.faq summary { display: flex; justify-content: space-between; gap: 20px; cursor: pointer; padding: 22px 4px; font-size: 19px; font-weight: 700; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { color: var(--green); content: "+"; font-size: 27px; font-weight: 400; }
.faq details[open] summary::after { content: "−"; }
.faq details p { max-width: 830px; margin: -4px 0 24px; color: var(--muted); }
.english-support { margin-bottom: 90px; border-radius: 26px; background: var(--panel); padding: 44px; box-shadow: 0 16px 45px rgba(21, 55, 43, .07); }
.english-support p { max-width: 850px; color: var(--muted); }

.guide-main { padding-bottom: 110px; }
.guide-hero { max-width: 900px; padding-block: 82px 74px; }
.guide-hero h1 { font-size: clamp(50px, 7vw, 82px); }
.guide-hero > p:not(.eyebrow) { max-width: 760px; margin: 24px 0; color: var(--muted); font-size: 20px; }
.guide-badges { display: flex; flex-wrap: wrap; gap: 9px; }
.guide-badges span { border: 1px solid rgba(8, 127, 91, .2); border-radius: 999px; background: rgba(223, 245, 233, .55); color: var(--green-dark); padding: 6px 11px; font-size: 12px; font-weight: 700; }
.guide-layout { display: grid; grid-template-columns: 220px minmax(0, 760px); justify-content: space-between; gap: 70px; align-items: start; }
.guide-nav { position: sticky; top: 104px; display: grid; gap: 5px; border-left: 3px solid var(--green); padding: 7px 0 7px 18px; }
.guide-nav strong { margin-bottom: 7px; font-size: 13px; }
.guide-nav a { color: var(--muted); font-size: 13px; text-decoration: none; }
.guide-nav a:hover, .guide-nav a:focus-visible { color: var(--green); outline: none; text-decoration: underline; text-underline-offset: 4px; }
.guide-content > section { scroll-margin-top: 100px; margin-bottom: 88px; }
.guide-content .chapter { margin: 0 0 9px; color: var(--green); font-size: 11px; font-weight: 850; letter-spacing: .13em; text-transform: uppercase; }
.guide-content h2 { margin: 0 0 28px; font-size: clamp(31px, 4vw, 44px); line-height: 1.12; letter-spacing: -.035em; }
.guide-content > section > p:not(.chapter) { color: var(--muted); }
.step-list { display: grid; gap: 12px; }
.guide-step { display: grid; grid-template-columns: 42px 1fr; gap: 17px; border: 1px solid var(--line); border-radius: 16px; background: rgba(255, 255, 255, .7); padding: 20px; }
.guide-step > b { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 13px; background: var(--ink); color: #fff; font-size: 14px; }
.guide-step h3 { margin: 0 0 4px; font-size: 18px; }
.guide-step p { margin: 0; color: var(--muted); font-size: 14px; }
.reference-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.reference-grid article { border-top: 3px solid var(--green); border-radius: 3px 3px 17px 17px; background: #fff; padding: 21px; }
.reference-grid span { color: var(--green); font-size: 11px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.reference-grid h3 { margin: 8px 0 7px; font-size: 18px; line-height: 1.3; }
.reference-grid p { margin: 0; color: var(--muted); font-size: 13px; }
.choice-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.choice-list > div { border: 1px solid var(--line); border-radius: 17px; background: rgba(255, 255, 255, .72); padding: 20px; }
.choice-list > div:first-child { border-color: rgba(8, 127, 91, .35); background: var(--mint); }
.choice-list b { color: var(--green); font-size: 10px; letter-spacing: .08em; text-transform: uppercase; }
.choice-list h3 { margin: 8px 0 7px; font-size: 21px; }
.choice-list p { margin: 0; color: var(--muted); font-size: 13px; }
.notice { display: grid; grid-template-columns: auto 1fr; gap: 12px; margin-top: 24px; border-radius: 15px; background: #fff3dd; color: #654916; padding: 18px; font-size: 14px; }
.recommended-box { border-radius: 24px; background: var(--ink); color: #fff; padding: 38px !important; }
.recommended-box .chapter { color: var(--lime); }
.recommended-box ul { display: grid; gap: 10px; margin: 0; padding-left: 22px; color: #d4ded9; }

footer { border-top: 1px solid var(--line); }
.footer-wrap { min-height: 100px; display: flex; justify-content: space-between; align-items: center; gap: 24px; color: var(--muted); font-size: 13px; }
.footer-wrap p:last-child { display: flex; gap: 20px; }

@media (max-width: 820px) {
  .hero, .support-hero { grid-template-columns: 1fr; gap: 44px; }
  .screen-grid { grid-template-columns: repeat(3, minmax(280px, 1fr)); overflow-x: auto; padding: 20px 4px 24px; scroll-snap-type: x mandatory; }
  .phone-card { scroll-snap-align: start; }
  .featured-phone { transform: none; }
  .guide-callout { align-items: flex-start; flex-direction: column; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-grid h3 { margin-top: 18px; }
  .legal-grid { grid-template-columns: 1fr; gap: 38px; }
  .privacy-facts { position: static; }
  .guide-layout { grid-template-columns: 1fr; gap: 42px; }
  .guide-nav { position: static; grid-template-columns: repeat(2, 1fr); border-left: 0; border-top: 3px solid var(--green); border-radius: 0 0 15px 15px; background: rgba(255, 255, 255, .65); padding: 17px; }
  .guide-nav strong { grid-column: 1 / -1; }
  .choice-list { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .shell { width: min(100% - 28px, 1120px); }
  .nav-wrap { min-height: 66px; }
  .brand span, nav a:first-child { display: none; }
  nav { gap: 0; }
  nav a { padding: 7px; font-size: 13px; }
  .language-link { margin-left: 2px; }
  .hero, .support-hero { min-height: 0; padding-block: 56px 68px; }
  h1, .page-heading h1, .support-hero h1 { font-size: 42px; }
  .summary-card, .contact-card { border-radius: 22px; padding: 25px; }
  .features, .faq { padding-block: 65px 74px; }
  .product-tour { padding-block: 68px 78px; }
  .guide-callout { padding: 28px; }
  .page-heading { padding-block: 56px 42px; }
  .legal { padding-bottom: 74px; }
  .legal-copy h2 { font-size: 24px; }
  .english-support { margin-bottom: 70px; padding: 27px; }
  .guide-main { padding-bottom: 75px; }
  .guide-hero { padding-block: 58px 54px; }
  .reference-grid { grid-template-columns: 1fr; }
  .guide-step { grid-template-columns: 36px 1fr; padding: 17px; }
  .guide-step > b { width: 36px; height: 36px; }
  .recommended-box { padding: 26px !important; }
  .footer-wrap { align-items: flex-start; flex-direction: column; justify-content: center; padding-block: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}