:root {
  --one-blue: #0b57d0;
  --one-blue-2: #4c7dff;
  --one-cyan: #62d6ff;
  --one-ink: #10131a;
  --one-muted: #5d6370;
  --one-bg: #f2f4f8;
  --one-surface: rgba(255, 255, 255, 0.88);
  --one-line: rgba(17, 24, 39, 0.09);
  --one-radius: 28px;
  --one-radius-sm: 18px;
  --one-shadow: 0 18px 50px rgba(30, 54, 95, 0.11);
  --content: 1160px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--one-ink);
  background:
    radial-gradient(circle at 6% 0%, rgba(98, 214, 255, 0.28), transparent 30rem),
    radial-gradient(circle at 95% 8%, rgba(76, 125, 255, 0.20), transparent 28rem),
    var(--one-bg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; }
a { color: var(--one-blue); text-decoration: none; }
a:hover { text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
.skip-link { position: fixed; top: -80px; left: 16px; z-index: 1000; padding: 10px 16px; color: #fff; background: #111; border-radius: 12px; }
.skip-link:focus { top: 16px; }
.container { width: min(calc(100% - 32px), var(--content)); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  padding-top: env(safe-area-inset-top);
  background: rgba(242, 244, 248, 0.78);
  border-bottom: 1px solid rgba(255,255,255,.65);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
}
.nav-wrap { min-height: 72px; display: flex; align-items: center; gap: 22px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--one-ink); font-size: 19px; font-weight: 800; letter-spacing: -.02em; white-space: nowrap; }
.brand img { width: 42px; height: 42px; border-radius: 14px; box-shadow: 0 8px 18px rgba(11,87,208,.18); }
.nav-links { margin-left: auto; display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 9px 13px; color: #343946; border-radius: 14px; font-size: 15px; font-weight: 650; }
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--one-blue); background: rgba(255,255,255,.82); }
.nav-cta { color: #fff !important; background: var(--one-blue) !important; box-shadow: 0 8px 20px rgba(11,87,208,.2); }
.nav-toggle { display: none; margin-left: auto; width: 44px; height: 44px; border: 0; border-radius: 15px; background: #fff; color: #111; font-size: 21px; }
.nav-menu { position: relative; }
.nav-menu summary { cursor: pointer; list-style: none; padding: 9px 13px; color: #343946; border-radius: 14px; font-size: 15px; font-weight: 650; }
.nav-menu summary::-webkit-details-marker { display: none; }
.nav-menu summary::after { content: "⌄"; display: inline-block; margin-left: 6px; transition: transform .2s ease; }
.nav-menu[open] summary::after { transform: rotate(180deg); }
.nav-menu summary:hover, .nav-menu[open] summary, .nav-menu.is-current summary { color: var(--one-blue); background: rgba(255,255,255,.82); }
.nav-menu summary:focus-visible { outline: 3px solid rgba(11,87,208,.24); outline-offset: 2px; }
.nav-menu-panel { position: absolute; top: calc(100% + 10px); right: 0; display: grid; min-width: 190px; padding: 10px; background: rgba(255,255,255,.98); border: 1px solid #fff; border-radius: 20px; box-shadow: var(--one-shadow); }
.nav-menu-panel a { padding: 11px 12px; }

.hero { position: relative; overflow: hidden; padding: 72px 0 34px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; align-items: center; gap: 34px; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px; padding: 7px 12px; color: #174ca6; background: rgba(255,255,255,.82); border: 1px solid rgba(255,255,255,.9); border-radius: 999px; font-size: 14px; font-weight: 750; box-shadow: 0 8px 24px rgba(30,54,95,.06); }
.eyebrow::before { content: ""; width: 8px; height: 8px; background: #35c875; border-radius: 50%; box-shadow: 0 0 0 5px rgba(53,200,117,.13); }
h1, h2, h3 { margin: 0 0 .65em; line-height: 1.16; letter-spacing: -.035em; }
h1 { font-size: clamp(40px, 5vw, 64px); }
h2 { font-size: clamp(29px, 4vw, 46px); }
h3 { font-size: 21px; }
.hero-copy { max-width: 650px; color: #4e5665; font-size: clamp(17px, 2.2vw, 20px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 50px; padding: 13px 22px; border: 1px solid transparent; border-radius: 18px; font-weight: 760; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { color: #fff; background: linear-gradient(135deg, var(--one-blue), var(--one-blue-2)); box-shadow: 0 13px 28px rgba(11,87,208,.23); }
.button-secondary { color: #222a38; background: rgba(255,255,255,.82); border-color: rgba(255,255,255,.92); box-shadow: 0 10px 26px rgba(30,54,95,.08); }
.hero-notes { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 22px; color: #626978; font-size: 14px; }
.hero-notes span::before { content: "✓"; margin-right: 6px; color: #1da260; font-weight: 900; }
.ocean-card { position: relative; min-height: 480px; overflow: hidden; border-radius: 42px; background: linear-gradient(160deg, #173373 0%, #274db2 42%, #51c5f1 100%); box-shadow: 0 28px 70px rgba(18,55,130,.28); isolation: isolate; }
.ocean-card::before, .ocean-card::after { content: ""; position: absolute; border-radius: 50%; background: rgba(255,255,255,.13); }
.ocean-card::before { width: 220px; height: 220px; top: -80px; right: -50px; }
.ocean-card::after { width: 110px; height: 110px; bottom: 70px; left: -30px; }
.ocean-label { position: absolute; top: 28px; left: 28px; z-index: 3; display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 780; }
.ocean-label img { width: 48px; height: 48px; border-radius: 16px; }
.boat-stage { position: absolute; z-index: 4; top: 17%; left: 7%; width: 287px; height: 214px; transform: scale(1.05); transform-origin: left top; filter: drop-shadow(0 16px 16px rgba(5,20,60,.22)); animation: floatBoat 4.8s ease-in-out infinite; }
.boat-stage img { position: absolute; max-width: none; }
.boat-stage .boat-front { z-index: 70; top: 48px; left: 0; width: 233px; height: 79px; }
.boat-stage .boat-back { z-index: 52; top: 50px; left: 3px; width: 231px; height: 75px; }
.boat-stage .reflection { z-index: 51; top: 114px; left: 28px; width: 259px; height: 100px; opacity: .8; }
.boat-stage .shadow { z-index: 58; top: 116px; left: 38px; width: 190px; height: 15px; }
.boat-stage .c1-ski-1 { z-index: 60; left: 28px; top: 28px; width: 39px; height: 59px; }
.boat-stage .c1-ski-2 { z-index: 59; left: 45px; top: 22px; width: 18px; height: 60px; }
.boat-stage .c1 { z-index: 58; left: 60px; top: 41px; width: 49px; height: 55px; }
.boat-stage .c1-eyebrow { z-index: 58; left: 78px; top: 54px; width: 10px; height: 5px; }
.boat-stage .c2 { z-index: 62; top: 56px; left: 79px; width: 49px; height: 49px; }
.boat-stage .c2-eye { z-index: 63; top: 64px; left: 84px; width: 39px; height: 25px; }
.boat-stage .c3 { z-index: 57; width: 61px; height: 72px; left: 82px; top: 4px; }
.boat-stage .c3-eye-left { z-index: 58; width: 9px; height: 10px; left: 104px; top: 38px; }
.boat-stage .c3-eye-right { z-index: 58; width: 12px; height: 13px; left: 118px; top: 36px; }
.boat-stage .c4 { z-index: 63; width: 49px; height: 50px; left: 125px; top: 51px; }
.boat-stage .c4-eye-left { z-index: 64; width: 6px; height: 7px; left: 139px; top: 65px; }
.boat-stage .c4-eye-right { z-index: 64; width: 6px; height: 7px; left: 150px; top: 65px; }
.boat-stage .c5 { z-index: 55; width: 50px; height: 59px; left: 128px; top: 9px; }
.boat-stage .c5-glasses { z-index: 56; width: 37px; height: 13px; left: 136px; top: 33px; }
.boat-stage .c6 { z-index: 56; width: 49px; height: 49px; top: 45px; left: 156px; }
.boat-stage .c6-wrinkle-left { z-index: 57; width: 10px; height: 7px; top: 62px; left: 170px; }
.boat-stage .c6-wrinkle-right { z-index: 57; width: 10px; height: 6px; top: 70px; left: 184px; }
.shark-ip {
  position: absolute;
  z-index: 1;
  left: 11%;
  right: 11%;
  bottom: -9%;
  width: 78%;
  height: 70%;
  object-fit: contain;
  object-position: center bottom;
  opacity: .98;
  animation: swimShark 7s ease-in-out infinite;
}
.wave { position: absolute; z-index: 4; left: -10%; right: -10%; bottom: -65px; height: 150px; background: rgba(224,248,255,.26); border-radius: 50% 50% 0 0; transform: rotate(-3deg); }
@keyframes floatBoat { 50% { transform: translateY(-12px) rotate(1deg); } }
@keyframes swimShark { 50% { transform: translateX(-18px) translateY(7px); } }

.trust-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 26px; }
.trust-item { padding: 18px; text-align: center; background: rgba(255,255,255,.65); border: 1px solid rgba(255,255,255,.9); border-radius: 20px; }
.trust-item strong { display: block; font-size: 18px; }
.trust-item span { color: var(--one-muted); font-size: 13px; }

.section { padding: 84px 0; }
.section-sm { padding: 50px 0; }
main > .section, main > .section-sm { content-visibility: auto; contain-intrinsic-size: auto 640px; }
.section-heading { max-width: 720px; margin-bottom: 34px; }
.section-heading p { margin: 0; color: var(--one-muted); font-size: 17px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 28px; background: var(--one-surface); border: 1px solid rgba(255,255,255,.9); border-radius: var(--one-radius); box-shadow: var(--one-shadow); }
.card-icon { display: grid; place-items: center; width: 52px; height: 52px; margin-bottom: 20px; color: #fff; background: linear-gradient(135deg, #3478f6, #6ad8ff); border-radius: 18px; font-size: 24px; box-shadow: 0 12px 24px rgba(52,120,246,.2); }
.card p { margin-bottom: 0; color: var(--one-muted); }
.download-card { position: relative; display: flex; flex-direction: column; min-height: 300px; }
.download-card .button { margin-top: auto; }
.platform { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 18px; font-weight: 800; font-size: 22px; }
.platform-badge { display: grid; place-items: center; width: 50px; height: 50px; border-radius: 16px; color: #fff; background: #121722; }
.download-meta { margin: -8px 0 18px; color: var(--one-muted); font-size: 14px; }
.callout { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 26px; padding: 38px; color: #fff; background: linear-gradient(135deg, #0e255b, #174fae 58%, #398bd7); border-radius: 34px; box-shadow: 0 25px 60px rgba(19,57,134,.24); }
.callout p { margin: 0; color: rgba(255,255,255,.78); }
.callout .button { color: #124a9e; background: #fff; }

.page-hero { padding: 64px 0 42px; }
.page-hero .container { max-width: 920px; }
.page-hero h1 { font-size: clamp(38px, 6vw, 64px); }
.page-hero p { max-width: 760px; color: var(--one-muted); font-size: 19px; }
.breadcrumbs { margin: 0 0 24px; color: #687181; font-size: 14px; }
.breadcrumbs a { color: #52647e; }
.content-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 24px; align-items: start; }
.article { padding: clamp(24px, 5vw, 52px); background: rgba(255,255,255,.9); border: 1px solid rgba(255,255,255,.95); border-radius: 34px; box-shadow: var(--one-shadow); }
.article h2 { margin-top: 1.55em; font-size: clamp(25px, 4vw, 34px); }
.article h3 { margin-top: 1.35em; }
.article p, .article li { color: #414957; }
.article li + li { margin-top: 8px; }
.article-lead { font-size: 19px; color: #303948 !important; }
.article-meta { display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 24px; color: #6a7280; font-size: 14px; }
.notice { margin: 24px 0; padding: 20px 22px; background: #edf5ff; border-left: 4px solid var(--one-blue); border-radius: 8px 18px 18px 8px; color: #304866; }
.sidebar { position: sticky; top: 96px; padding: 24px; background: rgba(255,255,255,.78); border: 1px solid #fff; border-radius: 26px; }
.sidebar h2 { font-size: 20px; }
.sidebar a { display: block; padding: 9px 0; color: #39485d; border-bottom: 1px solid var(--one-line); }
.article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.article-card { display: flex; flex-direction: column; min-height: 255px; padding: 28px; color: inherit; background: rgba(255,255,255,.86); border: 1px solid #fff; border-radius: 28px; box-shadow: var(--one-shadow); transition: transform .2s ease; }
.article-card:hover { transform: translateY(-4px); }
.article-card .tag { align-self: flex-start; margin-bottom: 22px; padding: 5px 10px; color: #1950aa; background: #e8f1ff; border-radius: 999px; font-size: 13px; font-weight: 700; }
.article-card p { color: var(--one-muted); }
.article-card .read-more { margin-top: auto; color: var(--one-blue); font-weight: 700; }
.faq details { margin-bottom: 12px; padding: 20px 22px; background: rgba(255,255,255,.82); border: 1px solid #fff; border-radius: 20px; }
.faq summary { cursor: pointer; font-weight: 750; }
.faq details p { color: var(--one-muted); }
.download-panel { text-align: center; padding: 46px; }
.download-panel .platform-badge { margin: 0 auto 18px; }
.download-panel .button { min-width: 220px; }
.legal { max-width: 900px; }
.legal h1 { font-size: clamp(38px, 6vw, 60px); }

.site-footer { margin-top: 64px; padding: 48px 0 calc(30px + env(safe-area-inset-bottom)); background: #0f1724; color: #d5dce8; }
.footer-grid { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.site-footer .brand { color: #fff; }
.site-footer p { color: #929db0; }
.site-footer h2 { font-size: 15px; letter-spacing: 0; }
.site-footer a { display: block; margin: 9px 0; color: #b9c3d3; }
.footer-bottom { margin-top: 32px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.1); color: #808b9d; font-size: 13px; }

@media (max-width: 900px) {
  .nav-toggle { display: inline-grid; place-items: center; }
  .nav-links { position: absolute; top: calc(72px + env(safe-area-inset-top)); left: 16px; right: 16px; display: none; padding: 12px; background: rgba(255,255,255,.96); border: 1px solid #fff; border-radius: 22px; box-shadow: var(--one-shadow); }
  .nav-links.is-open { display: grid; }
  .nav-links a { padding: 12px 14px; }
  .nav-menu { position: static; }
  .nav-menu summary { padding: 12px 14px; }
  .nav-menu-panel { position: static; margin: 6px 0 4px; min-width: 0; background: #f1f5fb; box-shadow: none; }
  .hero { padding-top: 48px; }
  .hero-grid { grid-template-columns: 1fr; }
  .ocean-card { min-height: 420px; }
  .boat-stage { transform: scale(.9); }
  .cards { grid-template-columns: 1fr 1fr; }
  .content-grid { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 620px) {
  .container { width: min(calc(100% - 24px), var(--content)); }
  .nav-wrap { min-height: 66px; }
  .brand img { width: 38px; height: 38px; }
  .hero { padding-top: 38px; }
  h1 { font-size: 42px; }
  .hero-actions .button { width: 100%; }
  .ocean-card { min-height: 340px; border-radius: 30px; }
  .boat-stage { top: 16%; left: 5%; transform: scale(.72); }
  .ocean-label { top: 20px; left: 20px; }
  .trust-strip, .cards, .article-list { grid-template-columns: 1fr; }
  .section { padding: 60px 0; }
  .callout { grid-template-columns: 1fr; padding: 28px; }
  .footer-grid { grid-template-columns: 1fr; }
  .article { border-radius: 26px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}