:root {
  font-family: "Segoe UI", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  color: #183b56;
  background: #f3f7f9;
  font-synthesis: none;
  --navy: #183b56;
  --navy-deep: #102c42;
  --teal: #19b7ad;
  --teal-dark: #087f7e;
  --silver: #e7eef2;
  --orange: #f4a24a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { min-width: 320px; margin: 0; }
img { display: block; max-width: 100%; }
svg { width: 1.25em; height: 1.25em; }
a { color: inherit; text-decoration: none; touch-action: manipulation; }
h1, h2, h3, p, figure { margin: 0; }
.container { width: min(100% - 48px, 1220px); margin-inline: auto; }
.skip-link { position: absolute; top: -80px; left: 16px; z-index: 100; padding: 11px 17px; background: var(--teal); color: #062c35; }
.skip-link:focus { top: 12px; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }

.site-header { position: absolute; inset: 0 0 auto; z-index: 10; border-bottom: 1px solid rgba(231,238,242,.17); color: #fff; }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 26px; min-height: 82px; }
.brand { display: inline-flex; align-items: center; gap: 11px; white-space: nowrap; font-size: 17px; font-weight: 700; }
.brand img, .footer-brand img, .release-icon img { border-radius: 10px; }
.brand b { color: #b4cbd4; font-weight: 500; }
.main-nav { display: flex; gap: 36px; color: #d0e0e7; font-size: 14px; }
.main-nav a, .text-link { transition: color .2s ease; }
.main-nav a:hover, .text-link:hover { color: #56d7ce; }
.header-download { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 18px; border: 1px solid rgba(82,219,209,.65); border-radius: 8px; color: #e9fffd; font-size: 13px; font-weight: 700; transition: background .2s ease; }
.header-download:hover { background: rgba(25,183,173,.18); }

.hero { position: relative; overflow: hidden; background: linear-gradient(130deg, #102c42 0%, #183b56 67%, #17445a 100%); color: #fff; }
.hero::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(231,238,242,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(231,238,242,.045) 1px, transparent 1px); background-size: 76px 76px; mask-image: linear-gradient(to bottom, transparent, #000 20%, #000 80%, transparent); pointer-events: none; }
.hero::after { content: ""; position: absolute; right: -260px; bottom: -500px; width: 850px; height: 850px; border-radius: 50%; background: radial-gradient(circle, rgba(25,183,173,.17), transparent 69%); pointer-events: none; }
.hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0,1.35fr) minmax(320px,.65fr); align-items: center; gap: 90px; min-height: 735px; padding-top: 150px; padding-bottom: 105px; }
.eyebrow, .section-index, .aside-kicker { font-size: 12px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 11px; color: #72ded7; }
.eyebrow-mark { width: 9px; height: 9px; border-radius: 2px; background: var(--teal); box-shadow: 0 0 18px rgba(25,183,173,.6); }
.hero h1 { max-width: 860px; margin-top: 29px; font-size: clamp(49px, 5.3vw, 78px); font-weight: 700; line-height: 1.16; letter-spacing: -.065em; }
.hero h1 em, .flow-intro h2 em { color: #51d4cb; font-style: normal; }
.hero-copy > p:not(.hero-meta) { max-width: 690px; margin-top: 30px; color: #d4e2e9; font-size: 18px; line-height: 1.9; }
.hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 29px; margin-top: 36px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 11px; min-height: 56px; padding: 0 25px; border-radius: 8px; font-size: 15px; font-weight: 700; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 19px; height: 19px; }
.button-primary { background: var(--teal); color: #052c35; box-shadow: 0 14px 30px rgba(4,35,45,.2); }
.button-primary:hover { background: #5cdbd2; box-shadow: 0 18px 35px rgba(4,35,45,.27); }
.text-link { color: #e4f3f6; font-size: 15px; font-weight: 700; }
.hero-meta { margin-top: 21px; color: #9eb9c4; font-size: 13px; }
.hero-aside { padding: 29px 31px 18px; border: 1px solid rgba(108,214,211,.4); border-radius: 13px; background: rgba(8,34,51,.3); box-shadow: 0 22px 50px rgba(4,25,41,.13); backdrop-filter: blur(10px); }
.aside-kicker { color: #6bd9d1; }
.hero-aside p { margin-top: 31px; font-size: clamp(24px,2.3vw,31px); font-weight: 700; line-height: 1.45; letter-spacing: -.04em; }
.hero-aside ul { margin: 32px 0 0; padding: 0; list-style: none; }
.hero-aside li { display: flex; align-items: center; gap: 21px; padding: 17px 0; border-top: 1px solid rgba(220,238,244,.16); color: #e9f4f6; font-size: 15px; font-weight: 600; }
.hero-aside li span { color: #57c8c1; font-size: 12px; font-weight: 700; }

.section { padding: 122px 0; }
.section-light { background: #f3f7f9; }
.section-index { display: block; color: #087f7e; }
.section-heading { display: grid; grid-template-columns: 1.2fr .8fr; column-gap: 66px; align-items: end; }
.section-heading .section-index { grid-column: 1 / -1; margin-bottom: 22px; }
.section-heading h2, .flow-intro h2, .download-copy h2 { font-size: clamp(39px,4.4vw,61px); font-weight: 700; line-height: 1.22; letter-spacing: -.06em; }
.section-heading p { max-width: 370px; margin-bottom: 7px; color: #556b79; font-size: 16px; line-height: 1.85; }
.feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 17px; margin-top: 62px; }
.feature-card { position: relative; min-height: 295px; padding: 32px 30px; border: 1px solid #d9e6eb; border-radius: 13px; background: #fff; box-shadow: 0 12px 35px rgba(24,59,86,.035); }
.feature-icon { display: grid; place-items: center; width: 49px; height: 49px; border-radius: 10px; background: #dff4f2; color: #078c89; }
.feature-icon svg { width: 28px; height: 28px; }
.feature-count { position: absolute; top: 35px; right: 31px; color: #9bb5bd; font-size: 13px; }
.feature-card h3 { margin-top: 39px; font-size: 23px; letter-spacing: -.035em; }
.feature-card p { max-width: 330px; margin-top: 15px; color: #5c6e77; font-size: 15px; line-height: 1.8; }

.flow-section { background: #153a53; color: #fff; }
.flow-layout { display: grid; grid-template-columns: .95fr 1.05fr; gap: 110px; }
.flow-intro .section-index { color: #69d9d1; }
.flow-intro h2 { margin-top: 28px; }
.flow-intro > p { max-width: 420px; margin-top: 25px; color: #c4d5dd; font-size: 16px; line-height: 1.85; }
.flow-list { margin: 0; padding: 0; list-style: none; }
.flow-list li { display: grid; grid-template-columns: 56px 1fr; gap: 24px; padding: 28px 0; border-top: 1px solid rgba(220,238,244,.2); }
.flow-list li:last-child { border-bottom: 1px solid rgba(220,238,244,.2); }
.flow-list li > span { padding-top: 5px; color: var(--orange); font-size: 15px; font-weight: 700; }
.flow-list h3 { font-size: 21px; }
.flow-list p { margin-top: 10px; color: #bacdd5; font-size: 15px; line-height: 1.8; }

.download-section { background: #e7f0f3; }
.download-layout { display: grid; grid-template-columns: 1fr 470px; align-items: center; gap: 86px; }
.download-copy h2 { margin-top: 27px; }
.download-copy > p { max-width: 540px; margin-top: 24px; color: #526976; font-size: 16px; line-height: 1.85; }
.button-dark { margin-top: 31px; background: var(--navy); color: #fff; }
.button-dark:hover { background: #245474; }
.release-card { padding: 32px; border: 1px solid #d3e2e8; border-radius: 15px; background: #fff; box-shadow: 0 22px 48px rgba(24,59,86,.07); }
.release-top { display: flex; align-items: flex-start; justify-content: space-between; }
.release-badge { padding: 6px 9px; border-radius: 5px; background: #dcf4f1; color: #087f7e; font-size: 11px; font-weight: 700; letter-spacing: .13em; }
.release-card h3 { margin-top: 24px; font-size: 22px; letter-spacing: -.03em; }
.release-version { margin-top: 7px; color: #087f7e; font-size: 14px; font-weight: 700; }
.release-card dl { margin: 27px 0 0; border-top: 1px solid #e0e9ed; }
.release-card dl div { display: flex; justify-content: space-between; gap: 20px; padding: 15px 0; border-bottom: 1px solid #e0e9ed; font-size: 14px; }
.release-card dt { color: #687d88; }
.release-card dd { margin: 0; font-weight: 700; text-align: right; }
.checksum { margin-top: 25px; }
.checksum span { display: block; margin-bottom: 9px; color: #687d88; font-size: 13px; }
.checksum code { display: block; overflow-wrap: anywhere; padding: 13px 14px; border-radius: 8px; background: #edf3f5; color: #274757; font-size: 12px; line-height: 1.7; }

.site-footer { padding: 36px 0; background: var(--navy-deep); color: #e9f4f6; }
.footer-inner { display: flex; align-items: center; gap: 36px; }
.footer-brand { display: flex; align-items: center; gap: 9px; font-size: 15px; font-weight: 700; }
.footer-inner p { color: #a9c4ce; font-size: 13px; }
.footer-inner small { margin-left: auto; color: #91acb7; font-size: 12px; }

@media (max-width: 950px) {
  .main-nav { display: none; }
  .hero-inner { grid-template-columns: 1fr; gap: 55px; min-height: 0; padding-bottom: 85px; }
  .hero-aside { max-width: 650px; }
  .hero-aside ul { display: grid; grid-template-columns: 1fr 1fr; column-gap: 30px; }
  .section-heading { grid-template-columns: 1fr; }
  .section-heading p { max-width: 620px; margin-top: 22px; }
  .flow-layout, .download-layout { grid-template-columns: 1fr; gap: 55px; }
  .release-card { max-width: 580px; }
}

@media (max-width: 650px) {
  .container { width: min(100% - 34px, 1220px); }
  .header-inner { min-height: 70px; }
  .brand { font-size: 15px; }
  .brand img { width: 32px; height: 32px; }
  .header-download { min-height: 36px; padding: 0 10px; font-size: 12px; }
  .hero-inner { gap: 46px; padding-top: 138px; padding-bottom: 68px; }
  .hero h1 { margin-top: 23px; font-size: clamp(39px,10vw,55px); line-height: 1.2; }
  .hero-copy > p:not(.hero-meta) { font-size: 16px; line-height: 1.8; }
  .hero-actions { gap: 19px; }
  .button { width: 100%; min-height: 54px; }
  .text-link { padding: 3px 0; }
  .hero-aside { padding: 25px 25px 12px; }
  .hero-aside p { margin-top: 24px; font-size: 25px; }
  .hero-aside ul { margin-top: 20px; }
  .hero-aside li { gap: 9px; font-size: 13px; }
  .section { padding: 79px 0; }
  .section-heading h2, .flow-intro h2, .download-copy h2 { font-size: clamp(37px,9vw,50px); }
  .feature-grid { grid-template-columns: 1fr; gap: 12px; margin-top: 41px; }
  .feature-card { min-height: 239px; padding: 26px; }
  .feature-card h3 { margin-top: 28px; }
  .flow-layout, .download-layout { gap: 43px; }
  .flow-list li { grid-template-columns: 38px 1fr; gap: 12px; }
  .release-card { padding: 23px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 13px; }
  .footer-inner small { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .button, .main-nav a, .text-link, .header-download { transition: none; }
}