:root {
    --bg: #f2f4f7;
    --surface: #ffffff;
    --surface-soft: #f6f7f9;
    --surface-tint: #fafbfc;
    --border: #e2e6eb;
    --border-strong: #cbd2da;
    --text: #172033;
    --text-soft: #4f5d70;
    --text-muted: #7b8798;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-soft: #eaf1ff;
    --green: #159447;
    --green-soft: #e9f7ef;
    --amber: #a76708;
    --amber-soft: #fff5dc;
    --red: #cf3f3f;
    --red-soft: #fff0f0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    background: var(--bg);
    font-synthesis: none;
}

* { box-sizing: border-box; }
html, body { min-height: 100%; margin: 0; }
body { min-width: 320px; background: var(--bg); font-size: 14px; line-height: 1.5; letter-spacing: 0; }
button, input { color: inherit; font: inherit; letter-spacing: 0; }
button { border: 0; }
button:not(:disabled), label { cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: .56; }
h1, h2, h3, p, dl, dd { margin: 0; }
svg { display: block; width: 18px; height: 18px; stroke-width: 1.8; }
.is-hidden { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.site-header { border-bottom: 1px solid var(--border); background: rgba(255, 255, 255, .97); }
.header-inner { width: min(100% - 40px, 1180px); min-height: 66px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; color: inherit; text-decoration: none; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 7px; color: #fff; background: var(--primary); }
.brand strong, .brand small { display: block; }
.brand strong { font-size: 15px; }
.brand small { margin-top: 1px; color: var(--text-muted); font-size: 12px; }
.service-nav { align-self: stretch; display: flex; align-items: stretch; gap: 22px; }
.service-nav a { position: relative; display: inline-flex; align-items: center; gap: 6px; padding: 0 2px; color: var(--text-muted); text-decoration: none; white-space: nowrap; font-size: 13px; font-weight: 650; }
.service-nav a::after { position: absolute; right: 0; bottom: 0; left: 0; height: 2px; content: ""; background: transparent; }
.service-nav a:hover, .service-nav a.active { color: var(--primary); }
.service-nav a.active::after { background: var(--primary); }
.service-nav svg { width: 16px; height: 16px; }

.page-shell { width: min(100% - 40px, 1180px); margin: 24px auto 42px; }
.query-tool { padding: 22px 24px 24px; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); box-shadow: 0 6px 22px rgba(23, 32, 51, .05); }
.tool-heading, .result-header { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.title-lockup { display: flex; align-items: center; gap: 12px; }
.title-icon { width: 38px; height: 38px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 7px; color: var(--primary); background: var(--primary-soft); }
.eyebrow { color: var(--primary); font-size: 12px; font-weight: 700; }
.tool-heading h1 { margin-top: 1px; font-size: 21px; line-height: 1.25; }
.service-status { display: inline-flex; align-items: center; gap: 7px; white-space: nowrap; color: var(--text-soft); font-size: 12px; }
.service-status > span { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); }
.service-status.online > span { background: var(--green); box-shadow: 0 0 0 4px var(--green-soft); }
.service-status.offline > span { background: var(--red); box-shadow: 0 0 0 4px var(--red-soft); }

#claim-form { margin-top: 20px; }
.query-row { display: grid; grid-template-columns: minmax(0, 1fr) 128px; gap: 9px; }
.input-shell { min-width: 0; height: 50px; display: flex; align-items: center; gap: 9px; padding: 0 10px 0 14px; border: 1px solid var(--border-strong); border-radius: 7px; background: #fff; }
.input-shell:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .1); }
.input-shell > svg { flex: 0 0 auto; color: var(--text-muted); }
.input-shell input { min-width: 0; width: 100%; height: 100%; padding: 0; border: 0; outline: 0; background: transparent; }
.input-shell input::placeholder { color: #9aa4b2; }
.icon-button { width: 32px; height: 32px; display: grid; place-items: center; flex: 0 0 auto; padding: 0; border-radius: 5px; color: var(--text-muted); background: transparent; }
.icon-button:hover { color: var(--text); background: var(--surface-soft); }
.primary-button { height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 7px; padding: 0 18px; border-radius: 7px; color: #fff; background: var(--primary); font-weight: 700; }
.primary-button:hover { background: var(--primary-hover); }
.primary-button:focus-visible, .icon-button:focus-visible { outline: 3px solid rgba(37, 99, 235, .24); outline-offset: 2px; }
.form-error { margin-top: 10px; padding: 9px 11px; border: 1px solid #f0c9c9; border-radius: 6px; color: var(--red); background: var(--red-soft); font-size: 13px; }

.loading-state { min-height: 88px; display: flex; align-items: center; justify-content: center; gap: 13px; margin-top: 14px; border: 1px solid var(--border); border-radius: 8px; color: var(--text-soft); background: var(--surface); }
.loading-state strong, .loading-state div > span { display: block; }
.loading-state div > span { margin-top: 1px; color: var(--text-muted); font-size: 12px; }
.spinner { width: 23px; height: 23px; border: 2px solid var(--border-strong); border-top-color: var(--primary); border-radius: 50%; animation: spin .75s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.result { margin-top: 14px; overflow: hidden; border: 1px solid var(--border); border-radius: 8px; background: var(--surface); box-shadow: 0 6px 22px rgba(23, 32, 51, .05); }
.result-header { min-height: 92px; padding: 20px 26px; border-bottom: 1px solid var(--border); }
.result-kicker { display: flex; align-items: center; gap: 7px; color: var(--text-soft); font-size: 13px; font-weight: 700; }
.result-kicker svg { width: 17px; height: 17px; color: var(--primary); }
.result-identity { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; margin-top: 7px; }
.result-header h2 { overflow-wrap: anywhere; font-size: 20px; line-height: 1.25; }
.realtime-label { display: inline-flex; align-items: center; gap: 7px; color: var(--text-muted); font-size: 12px; }
.realtime-label > span { width: 7px; height: 7px; border-radius: 50%; background: var(--green); }
.status-badge { display: inline-flex; align-items: center; gap: 6px; min-height: 27px; padding: 4px 9px; border-radius: 6px; white-space: nowrap; font-size: 12px; font-weight: 700; }
.status-badge svg { width: 15px; height: 15px; }
.status-badge.neutral { color: var(--text-soft); background: #edf0f3; }
.status-badge.success { color: var(--green); background: var(--green-soft); }
.status-badge.warning { color: var(--amber); background: var(--amber-soft); }
.status-badge.danger { color: var(--red); background: var(--red-soft); }
.status-badge.info { color: var(--primary); background: var(--primary-soft); }

.result-layout { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(300px, .8fr); }
.device-column { min-width: 0; padding: 24px 26px 28px; }
.service-column { min-width: 0; padding: 24px; border-left: 1px solid var(--border); background: var(--surface-tint); }
.section-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; }
.section-heading h3 { display: flex; align-items: center; gap: 8px; font-size: 15px; }
.section-heading h3 svg { width: 17px; height: 17px; color: var(--primary); }
.section-heading p { margin-top: 2px; color: var(--text-muted); font-size: 12px; }
.status-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 14px; }
.status-grid > div { min-width: 0; min-height: 72px; padding: 12px 14px; border: 1px solid #edf0f3; border-radius: 6px; background: var(--surface-soft); }
.status-grid dt { display: flex; align-items: center; gap: 7px; color: var(--text-muted); font-size: 12px; }
.status-grid dt svg { width: 15px; height: 15px; }
.status-grid dd { display: flex; align-items: center; gap: 7px; margin-top: 7px; overflow-wrap: anywhere; font-size: 14px; font-weight: 700; }
.status-grid dd[data-tone]::before { width: 7px; height: 7px; content: ""; flex: 0 0 auto; border-radius: 50%; background: var(--text-muted); }
.status-grid dd[data-tone="success"]::before { background: var(--green); }
.status-grid dd[data-tone="warning"]::before { background: var(--amber); }
.status-grid dd[data-tone="danger"]::before { background: var(--red); }
.status-meta { display: block; margin-top: 5px; color: var(--text-muted); font-size: 10px; overflow-wrap: anywhere; }

.wifi-section { margin-top: 24px; padding-top: 22px; border-top: 1px solid var(--border); }
.wifi-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 14px; }
.wifi-item { min-width: 0; padding: 13px 14px; border: 1px solid var(--border); border-radius: 7px; background: #fff; }
.wifi-item header { display: flex; align-items: center; justify-content: space-between; gap: 10px; color: var(--text-muted); font-size: 12px; }
.wifi-band { display: inline-flex; align-items: center; gap: 6px; color: var(--primary); font-weight: 700; }
.wifi-band svg { width: 15px; height: 15px; }
.visibility-chip { padding: 2px 7px; border-radius: 5px; color: var(--text-soft); background: var(--surface-soft); }
.wifi-item strong { display: block; margin-top: 9px; overflow-wrap: anywhere; font-size: 14px; }
.empty-row { min-height: 72px; display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 14px; border: 1px dashed var(--border-strong); border-radius: 7px; color: var(--text-muted); background: var(--surface-soft); }
.empty-row svg { width: 17px; height: 17px; }

.service-heading { padding-bottom: 15px; border-bottom: 1px solid var(--border); }
.notice { display: flex; align-items: flex-start; gap: 11px; margin-top: 16px; padding: 13px; border: 1px solid #eed7a8; border-radius: 7px; color: var(--amber); background: var(--amber-soft); }
.notice > svg { flex: 0 0 auto; margin-top: 1px; }
.notice.danger { color: var(--red); border-color: #f0c9c9; background: var(--red-soft); }
.notice.success { color: var(--green); border-color: #bfe7ce; background: var(--green-soft); }
.notice p { margin-top: 3px; color: inherit; font-size: 13px; }
.gift-entry { width: 100%; min-height: 48px; display: flex; align-items: center; gap: 8px; margin-top: 12px; padding: 0 14px; border-radius: 7px; color: #fff; background: var(--primary); text-align: left; font-size: 13px; font-weight: 700; }
.gift-entry:hover { background: var(--primary-hover); }
.gift-entry:focus-visible { outline: 3px solid rgba(37, 99, 235, .24); outline-offset: 2px; }
.gift-entry:disabled { background: var(--primary); cursor: wait; }
.gift-entry svg { width: 17px; height: 17px; flex: 0 0 auto; }
.gift-entry svg:last-child { margin-left: auto; }
.gift-error { margin-top: 10px; padding: 9px 11px; border: 1px solid #f0c9c9; border-radius: 6px; color: var(--red); background: var(--red-soft); font-size: 13px; }
.grant-panel { margin-top: 16px; padding: 17px; border: 1px solid var(--border); border-radius: 7px; background: var(--surface); }
.grant-icon { width: 38px; height: 38px; display: grid; place-items: center; margin-bottom: 13px; border-radius: 7px; color: var(--primary); background: var(--primary-soft); }
.grant-content { min-width: 0; }
.grant-content h3 { margin-top: 2px; overflow-wrap: anywhere; font-size: 18px; }
#grant-status { margin-top: 10px; }
#grant-message { margin-top: 12px; color: var(--text-soft); font-size: 13px; }
.grant-times { display: grid; gap: 7px; margin-top: 13px; padding-top: 12px; border-top: 1px solid var(--border); color: var(--text-muted); font-size: 12px; }
.grant-times > span { display: flex; align-items: flex-start; gap: 6px; }
.grant-times svg { width: 15px; height: 15px; flex: 0 0 auto; margin-top: 1px; }

.site-footer { min-height: 54px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 12px; }
.site-footer span { display: inline-flex; align-items: center; gap: 7px; }
.site-footer svg { width: 15px; height: 15px; }

@media (max-width: 900px) {
    .result-layout { grid-template-columns: minmax(0, 1.45fr) minmax(270px, .8fr); }
}

@media (max-width: 760px) {
    .header-inner, .page-shell { width: min(100% - 24px, 1180px); }
    .header-inner { min-height: 62px; }
    .page-shell { margin-top: 16px; }
    .query-tool { padding: 18px 16px; }
    #claim-form { margin-top: 17px; }
    .result-layout { grid-template-columns: 1fr; }
    .device-column { padding: 21px 18px 24px; }
    .service-column { padding: 21px 18px 24px; border-top: 1px solid var(--border); border-left: 0; }
}

@media (max-width: 520px) {
    .header-inner { gap: 12px; }
    .brand { min-width: 0; gap: 8px; }
    .brand-mark { width: 36px; height: 36px; }
    .brand strong { white-space: nowrap; font-size: 14px; }
    .brand small { display: none; }
    .service-nav { gap: 16px; }
    .tool-heading { align-items: flex-start; }
    .title-icon { display: none; }
    .tool-heading h1 { font-size: 19px; }
    .service-status { padding-top: 4px; }
    .query-row { grid-template-columns: 1fr; }
    .primary-button { width: 100%; }
    .result-header { min-height: 0; align-items: flex-start; padding: 18px; }
    .result-header h2 { font-size: 18px; }
    .realtime-label { display: none; }
    .status-grid, .wifi-list { grid-template-columns: 1fr; }
    .status-grid > div { min-height: 67px; }
}

@media (max-width: 380px) {
    .service-nav { gap: 13px; }
    .service-nav a { font-size: 12px; }
    .service-nav svg { display: none; }
}