:root { color-scheme: dark; --background: #0e1319; --panel: #161c23; --border: #29333e; --text: #e5edf5; --muted: #9aa9b8; --accent: #69a5ee; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--text); font: 14px/1.7 system-ui, -apple-system, "Microsoft YaHei", sans-serif; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button, input, textarea { font: inherit; }
button, .button { min-height: 36px; padding: 7px 14px; border: 1px solid var(--border); border-radius: 5px; background: transparent; color: var(--text); }
button:enabled, .button { cursor: pointer; }
button:disabled { opacity: .5; }
.primary { background: #315f91; border-color: #487db5; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
header, footer { display: flex; align-items: center; gap: 24px; padding: 22px max(24px, calc((100vw - 1080px) / 2)); border-bottom: 1px solid var(--border); }
.brand { margin-right: auto; font-size: 22px; font-weight: 700; color: var(--text); }
nav { display: flex; flex-wrap: wrap; gap: 24px; }
nav a { color: var(--muted); }
main { max-width: 1128px; margin: auto; padding: 64px 24px 48px; }
.product { display: grid; grid-template-columns: minmax(0, 1fr) 380px; align-items: start; gap: 80px; }
.eyebrow { color: var(--muted); margin: 0 0 20px; }
h1 { font-size: clamp(32px, 4.6vw, 54px); line-height: 1.25; letter-spacing: -.03em; margin: 0 0 24px; }
h2 { margin: 0 0 10px; font-size: 18px; line-height: 1.5; }
p { margin: 0 0 16px; color: var(--muted); }
.intro { max-width: 440px; font-size: 17px; line-height: 1.9; }
.features { display: flex; flex-wrap: wrap; gap: 18px; padding-top: 16px; color: var(--muted); font-size: 13px; }
.account-card { min-width: 0; border: 1px solid var(--border); padding: 26px; border-radius: 8px; background: var(--panel); }
.account-card > p { font-size: 13px; }
.qq-login { display: block; padding: 0; border: 0; background: transparent; height: 32px; margin: 24px 0 16px; }
.qq-login img { display: block; }
#feedback { min-height: 44px; margin: 12px 0; overflow-wrap: anywhere; }
#feedback.is-error { color: #ed9696; }
.notice { border-top: 1px solid var(--border); padding-top: 14px; margin: 18px 0 0; font-size: 12px !important; }
#identity { display: flex; align-items: center; gap: 14px; margin: 18px 0; }
#identity img { border-radius: 50%; object-fit: cover; }
#identity strong { overflow-wrap: anywhere; font-size: 17px; }
form { display: grid; gap: 12px; }
label { display: grid; gap: 5px; font-size: 13px; color: var(--muted); }
input, textarea { width: 100%; background: var(--background); color: var(--text); border: 1px solid var(--border); border-radius: 5px; padding: 8px 10px; }
.actions { display: flex; justify-content: space-between; gap: 12px; border-top: 1px solid var(--border); padding-top: 14px; }
.details { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; margin-top: 64px; padding-top: 32px; border-top: 1px solid var(--border); }
.details p { font-size: 13px; }
.legal { max-width: 760px; margin: auto; }
.legal h1 { font-size: 30px; }
.legal h2 { margin-top: 26px; font-size: 17px; }
footer { flex-wrap: wrap; border-top: 1px solid var(--border); border-bottom: 0; font-size: 12px; color: var(--muted); }
footer span { margin-right: auto; }
body.account-page .product { display: block; }
body.account-page .product > div, body.account-page .details { display: none; }
body.account-page .account-card { max-width: 420px; margin: auto; }
@media (max-width: 800px) { main { padding-top: 32px; } .product { grid-template-columns: 1fr; gap: 32px; } .account-card { width: 100%; max-width: 420px; } .details { grid-template-columns: 1fr; gap: 20px; margin-top: 32px; } nav { gap: 12px; } header { gap: 14px; } }