:root {
  color-scheme: light;
  --ocean-950: #03152a;
  --ocean-900: #062443;
  --ocean-800: #083b70;
  --blue: #0071e3;
  --blue-hover: #0077ed;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: #d9d9df;
  --soft-line: #e8e8ed;
  --canvas: #f5f5f7;
  --surface: #ffffff;
  --surface-soft: #fbfbfd;
  --ok: #168447;
  --bad: #c93434;
  --warning: #8a5d00;
  --shadow: 0 18px 60px rgba(0, 31, 63, .10);
  --radius-xl: 32px;
  --radius-lg: 24px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--canvas);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
button, input { font: inherit; }
button, .button { min-height: 44px; }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 100; padding: 10px 14px; border-radius: 10px; background: #fff; color: var(--ink); transform: translateY(-150%); }
.skip-link:focus { transform: none; }
.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 max(24px, calc((100vw - 1120px) / 2));
  background: rgba(255,255,255,.88);
  border-bottom: 1px solid rgba(0,0,0,.08);
  backdrop-filter: saturate(180%) blur(20px);
}
.brand { display: flex; align-items: baseline; gap: 10px; min-width: 0; text-decoration: none; }
.brand strong { font-size: 18px; letter-spacing: -.02em; }
.brand span { color: var(--muted); font-size: 12px; letter-spacing: .08em; }
.tag { color: var(--muted); font-size: 13px; white-space: nowrap; }
.ocean-hero {
  position: relative;
  isolation: isolate;
  min-height: 560px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: var(--ocean-950) url('/ocean-hero.png') center 46% / cover no-repeat;
  color: #fff;
}
.ocean-hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: rgba(1, 16, 34, .46); }
.hero-content { width: min(900px, calc(100% - 40px)); margin: auto; padding: 78px 0 150px; text-align: center; }
.eyebrow { margin-bottom: 18px; color: #8fd0ff; font-size: 12px; font-weight: 750; letter-spacing: .24em; }
.ocean-hero h1, .inbox-hero h1 { margin: 0; font-size: clamp(44px, 7vw, 80px); line-height: .98; letter-spacing: -.055em; text-wrap: balance; }
.ocean-hero p { max-width: 650px; margin: 24px auto 0; color: rgba(255,255,255,.82); font-size: clamp(17px, 2vw, 22px); line-height: 1.55; }
.proof-row { display: flex; justify-content: center; gap: 9px; flex-wrap: wrap; margin-top: 30px; }
.proof-row span { padding: 8px 13px; border: 1px solid rgba(255,255,255,.28); border-radius: 999px; background: rgba(4,35,65,.48); color: rgba(255,255,255,.9); font-size: 12px; backdrop-filter: blur(12px); }
.wrap { width: min(1120px, calc(100% - 32px)); margin: 48px auto; }
.send-wrap { position: relative; z-index: 2; margin-top: -104px; }
.card { background: rgba(255,255,255,.97); border: 1px solid rgba(0,0,0,.08); border-radius: var(--radius-xl); padding: clamp(22px, 4vw, 44px); box-shadow: var(--shadow); }
.receive-card { max-width: 760px; margin: 92px auto; text-align: center; }
.receive-card h1 { overflow-wrap: anywhere; font-size: clamp(32px, 5vw, 54px); letter-spacing: -.04em; }
.receive-card .button { display: inline-flex; margin-top: 18px; }
.upload-card { box-shadow: 0 30px 100px rgba(0,29,58,.18); }
.section-title { margin-bottom: 24px; text-align: center; }
.section-title h2 { margin: 0; font-size: clamp(28px, 4vw, 42px); letter-spacing: -.035em; }
.section-title p { margin: 9px auto 0; color: var(--muted); line-height: 1.6; }
.drop { min-height: 300px; display: grid; place-items: center; padding: 34px; border: 1.5px dashed #9abbd8; border-radius: var(--radius-lg); background: #f7fbff; text-align: center; cursor: pointer; transition: border-color .2s ease, background .2s ease, transform .2s ease, box-shadow .2s ease; }
.drop:hover, .drop.over { border-color: var(--blue); background: #eef7ff; box-shadow: inset 0 0 0 1px rgba(0,113,227,.1); transform: translateY(-2px); }
.drop:focus-within { outline: 4px solid rgba(0,113,227,.2); outline-offset: 3px; }
.upload-symbol { width: 72px; height: 72px; display: grid; place-items: center; margin: 0 auto 22px; border-radius: 22px; background: var(--ocean-900); color: #fff; font-size: 16px; font-weight: 700; letter-spacing: .12em; }
.drop strong { display: block; margin-bottom: 9px; font-size: 23px; letter-spacing: -.02em; }
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.muted { color: var(--muted); font-size: 13px; line-height: 1.6; }
button, .button { display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 10px 21px; border: 0; border-radius: 999px; background: var(--blue); color: #fff; font-weight: 600; line-height: 1; text-decoration: none; cursor: pointer; transition: background .18s ease, transform .18s ease, box-shadow .18s ease; }
button:hover, .button:hover { background: var(--blue-hover); transform: translateY(-1px); }
button:focus-visible, .button:focus-visible, input:focus-visible, summary:focus-visible { outline: 4px solid rgba(0,113,227,.25); outline-offset: 2px; }
button.secondary, .button.secondary { background: #e9e9ee; color: #232326; }
button.secondary:hover, .button.secondary:hover { background: #dedee4; }
button.danger { background: #fff0f0; color: var(--bad); }
button.danger:hover { background: #ffe4e4; }
button:disabled { opacity: .52; cursor: wait; transform: none; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin: 20px 0 0; }
.toolbar-note { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); }
.queue, .files { display: grid; gap: 12px; margin-top: 22px; }
.item { padding: 18px; border: 1px solid var(--soft-line); border-radius: 20px; background: var(--surface); box-shadow: 0 4px 20px rgba(0,0,0,.035); }
.item-head { display: flex; justify-content: space-between; gap: 20px; align-items: flex-start; }
.name { font-weight: 680; overflow-wrap: anywhere; }
.meta { margin-top: 6px; color: var(--muted); font-size: 12px; line-height: 1.55; }
.progress { height: 8px; margin: 15px 0 9px; overflow: hidden; border-radius: 8px; background: #e8ebef; }
.bar { width: 0; height: 100%; background: var(--blue); transition: width .15s linear; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.status { color: var(--muted); font-size: 13px; line-height: 1.5; }
.ok { color: var(--ok) !important; }
.bad { color: var(--bad) !important; }
.warning { color: var(--warning) !important; }
.empty { padding: 36px; color: var(--muted); text-align: center; }
.feature-grid, .step-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-top: 20px; }
.feature, .step { min-height: 170px; padding: 24px; border: 1px solid var(--soft-line); border-radius: var(--radius-lg); background: var(--surface); }
.feature b, .step b { display: block; margin-bottom: 10px; font-size: 17px; }
.feature p, .step p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.65; }
.step-number { display: block; margin-bottom: 26px; color: var(--blue); font-size: 12px; font-weight: 750; letter-spacing: .18em; }
.trust-note { margin-top: 16px; padding: 22px 24px; border-radius: var(--radius-lg); background: var(--ocean-950); color: #fff; }
.trust-note strong { display: block; margin-bottom: 7px; }
.trust-note p { margin: 0; color: rgba(255,255,255,.72); font-size: 13px; line-height: 1.7; }
.inbox-hero { padding: 76px 20px 58px; background: var(--ocean-950) url('/ocean-hero.png') center 55% / cover no-repeat; color: #fff; text-align: center; }
.inbox-hero .hero-inner { width: min(820px, 100%); margin: auto; }
.inbox-hero h1 { font-size: clamp(42px, 6vw, 68px); }
.inbox-hero p { margin: 18px 0 0; color: rgba(255,255,255,.78); font-size: 17px; }
.inbox-wrap { margin-top: 28px; }
.private-banner { display: flex; justify-content: space-between; gap: 18px; align-items: center; margin-bottom: 18px; padding: 16px 18px; border: 1px solid #d8e5f0; border-radius: 18px; background: #f3f8fc; }
.private-banner strong { color: var(--ocean-800); }
.public-address { display: grid; gap: 15px; padding: 22px; border: 1px solid #cbddec; border-radius: 20px; background: #f6faff; }
.public-address-copy { display: flex; gap: 10px; }
.file-tools { display: grid; grid-template-columns: minmax(0, 1fr) minmax(170px, 220px); gap: 10px; margin: 22px 0 12px; }
.file-tools input, .file-tools select { min-height: 46px; width: 100%; padding: 0 14px; border: 1px solid var(--line); border-radius: 12px; background: #fff; color: var(--ink); }
.public-address input { min-width: 0; flex: 1; padding: 12px 15px; border: 1px solid #b9cfe2; border-radius: 14px; background: #fff; color: var(--ink); }
.grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin: 18px 0; }
.metric { padding: 20px; border: 1px solid var(--soft-line); border-radius: 19px; background: var(--surface-soft); color: var(--muted); font-size: 13px; }
.metric b { display: block; margin-top: 8px; color: var(--ink); font-size: 25px; letter-spacing: -.02em; }
details { margin-top: 18px; border-top: 1px solid var(--soft-line); border-bottom: 1px solid var(--soft-line); }
summary { padding: 17px 2px; color: var(--muted); font-size: 13px; cursor: pointer; }
.mobile-tip { margin-top: 22px; padding: 17px 18px; border-radius: 17px; background: #f1f5f8; color: #586373; font-size: 13px; line-height: 1.7; }
.hash { font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; word-break: break-all; }
.site-footer { width: min(1120px, calc(100% - 32px)); display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; margin: 34px auto 46px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.site-footer strong { color: var(--ocean-800); }
.toast { position: fixed; right: 20px; bottom: 20px; z-index: 60; max-width: min(380px, calc(100% - 40px)); padding: 14px 18px; border-radius: 14px; background: rgba(25,25,27,.94); color: #fff; opacity: 0; transform: translateY(12px); transition: opacity .25s ease, transform .25s ease; pointer-events: none; box-shadow: 0 14px 45px rgba(0,0,0,.25); backdrop-filter: blur(16px); }
.toast.show { opacity: 1; transform: none; }
@media (max-width: 760px) {
  .topbar { height: 58px; padding-inline: 18px; }
  .brand span, .tag { display: none; }
  .ocean-hero { min-height: 500px; }
  .hero-content { padding: 62px 0 140px; }
  .ocean-hero h1, .inbox-hero h1 { letter-spacing: -.045em; }
  .send-wrap { margin-top: -92px; }
  .card { border-radius: 26px; }
  .drop { min-height: 250px; padding: 24px 18px; }
  .feature-grid, .step-grid, .grid { grid-template-columns: 1fr; }
  .feature, .step { min-height: auto; }
  .item-head { display: block; }
  .actions { margin-top: 12px; }
  .public-address-copy { display: grid; }
  .public-address-copy button { width: 100%; }
  .file-tools { grid-template-columns: 1fr; }
  .private-banner { align-items: flex-start; }
  .site-footer { display: grid; text-align: center; gap: 7px; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; } }
@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; --ink:#f5f5f7; --muted:#a1a1a6; --line:#34343a; --soft-line:#303036; --canvas:#0e0e10; --surface:#19191c; --surface-soft:#202024; }
  .topbar { background: rgba(18,18,20,.86); border-bottom-color: rgba(255,255,255,.1); }
  .card { background: rgba(25,25,28,.97); border-color: rgba(255,255,255,.1); }
  .drop { background:#111d28; border-color:#385b79; }
  .drop:hover, .drop.over { background:#10283d; }
  button.secondary, .button.secondary { background:#34343a; color:#f5f5f7; }
  .feature, .step, .item { background:var(--surface); }
  .public-address, .private-banner { background:#11202e; border-color:#29455e; }
  .public-address input { background:#202024; border-color:#455869; }
  .mobile-tip { background:#20262c; color:#b5bdc6; }
}