:root { color-scheme: light; --ink: #203b34; --muted: #66766e; --accent: #176c59; --line: #dbe3dc; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: #f3f5ee; color: var(--ink); font: 16px/1.65 "Microsoft YaHei", "PingFang SC", system-ui, sans-serif; }
.shell { max-width: 520px; margin: 0 auto; padding: 54px 22px 30px; }
.shell.wide { max-width: 980px; }
.intro { margin-bottom: 28px; }
.eyebrow { font-size: 11px; letter-spacing: .16em; color: var(--accent); font-weight: 700; }
h1 { font-size: clamp(28px, 5vw, 38px); font-weight: 600; letter-spacing: -.04em; margin: 8px 0; }
h2 { font-size: 21px; line-height: 1.45; margin: 0 0 12px; }
h3 { font-size: 17px; }
p { margin: 9px 0 16px; }
.card { padding: 28px; background: white; border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 12px 34px #203b3406; }
.muted, .intro>p:not(.eyebrow) { color: var(--muted); }
label { display: block; font-size: 14px; font-weight: 600; margin: 16px 0 6px; }
input:not([type=checkbox]), textarea { width: 100%; font: inherit; padding: 11px 12px; border: 1px solid #bccac0; border-radius: 7px; color: var(--ink); background: #fff; }
input:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible { outline: 3px solid #93c7b7; outline-offset: 3px; }
button { font: inherit; font-weight: 600; cursor: pointer; border: 1px solid var(--accent); border-radius: 7px; padding: 11px 16px; color: #fff; background: var(--accent); width: 100%; }
button:hover { background: #105642; }
button:disabled { opacity: .6; cursor: wait; }
button.outline { background: transparent; color: var(--accent); }
a { color: var(--accent); text-underline-offset: 4px; }
.secondary-link { display: block; margin-top: 22px; text-align: center; font-size: 14px; }
.hint { color: var(--muted); font-size: 12px; margin-top: 6px; }
.notice { padding: 12px 14px; border-left: 3px solid #b1cabc; background: #f0f5f0; font-size: 13px; margin-top: 18px; }
.message { color: #a13728; font-size: 14px; min-height: 1.5em; overflow-wrap: anywhere; }
.message.success { color: var(--accent); }
details { font-size: 13px; color: var(--muted); border-top: 1px solid var(--line); margin-top: 24px; padding-top: 18px; }
summary { cursor: pointer; }
footer { color: var(--muted); text-align: center; font-size: 12px; padding-top: 26px; }
footer button { width: auto; font-size: 14px; }
.account-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; align-items: start; }
.check { display: flex; align-items: flex-start; gap: 9px; font-size: 13px; font-weight: 400; }
.check input { margin-top: 5px; flex-shrink: 0; }
#code-result { border-top: 1px solid var(--line); padding-top: 18px; margin-top: 22px; }
#generated-code { font-family: ui-monospace, monospace; font-size: 14px; resize: vertical; word-break: break-all; margin-bottom: 14px; }
@media (max-width: 720px) { .account-grid { grid-template-columns: 1fr; } .shell { padding-top: 30px; } .card { padding: 22px; } }