:root {
    --bg:        #0f141b;
    --surface:   #161d27;
    --surface-2: #1d2632;
    --border:    #2a3646;
    --text:      #e6edf6;
    --muted:     #8b9bb0;
    --accent:    #2f81f7;      /* 主色：蓝（机票业务） */
    --xhr:       #f0883e;      /* 原生 AJAX 标记色 */
    --fetch:     #3fb950;      /* fetch 标记色 */
    --danger:    #f85149;
    --price:     #ffb454;
    --radius:    10px;
    --mono: ui-monospace, SFMono-Regular, "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    padding: 0 0 40px;
    background: var(--bg);
    color: var(--text);
    font: 14px/1.6 "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
}

code {
    font-family: var(--mono);
    font-size: .92em;
    background: rgba(47, 129, 247, .12);
    color: #79c0ff;
    padding: 1px 5px;
    border-radius: 4px;
}

/* ------------------------------------------------------------------ 顶栏 */
.topbar {
    padding: 26px 24px 20px;
    border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, #16202e, var(--bg));
}
.topbar h1 { margin: 0 0 6px; font-size: 22px; letter-spacing: .3px; }
.subtitle { margin: 0; color: var(--muted); font-size: 13px; }
.subtitle strong { color: var(--text); font-weight: 600; }

.wrap { max-width: 1360px; margin: 0 auto; padding: 20px 24px 0; }

/* ------------------------------------------------------------ 跨域提示条 */
.notice {
    border: 1px solid rgba(47, 129, 247, .35);
    background: rgba(47, 129, 247, .08);
    border-radius: var(--radius);
    padding: 12px 16px;
    font-size: 13px;
    color: #b9cbe4;
    margin-bottom: 18px;
}
.notice-tag {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 20px;
    margin-right: 8px;
    vertical-align: 1px;
}

/* ---------------------------------------------------------------- 卡片 */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px;
    margin-bottom: 18px;
}

/* ---------------------------------------------------------------- 表单 */
.form-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr 1fr;
    gap: 12px;
    align-items: end;
}
.field { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.field > span { font-size: 12px; color: var(--muted); }

select, input[type="date"] {
    width: 100%;
    padding: 9px 10px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font: inherit;
}
select:focus, input[type="date"]:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(47, 129, 247, .18);
}
/* 让日期选择器的图标在深色下可见 */
input[type="date"]::-webkit-calendar-picker-indicator { filter: invert(.7); cursor: pointer; }

.btn-swap {
    height: 38px;
    width: 38px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--muted);
    font-size: 16px;
    cursor: pointer;
}
.btn-swap:hover { color: var(--text); border-color: var(--accent); }

/* ---------------------------------------------------------------- 按钮 */
.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }

.btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 11px 16px;
    border: 1px solid transparent;
    border-radius: 8px;
    font: inherit;
    font-weight: 600;
    color: #fff;
    cursor: pointer;
    transition: transform .08s, filter .15s;
}
.btn:hover  { filter: brightness(1.12); }
.btn:active { transform: translateY(1px); }
.btn small  { font-weight: 400; opacity: .8; font-size: 11px; font-family: var(--mono); }
.btn-xhr    { background: #b8561b; }
.btn-fetch  { background: #22702f; }

.actions-note { margin: 12px 0 0; font-size: 12px; color: var(--muted); }
.actions-note strong { color: var(--text); }

/* ------------------------------------------------------- 结果面板（双栏） */
.panels {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 18px;
}
.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px;
    min-width: 0;                 /* 关键：允许表格在 grid 列内收缩而不是撑破 */
}
.panel h2 {
    margin: 0 0 10px;
    font-size: 14px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}
.dot { width: 9px; height: 9px; border-radius: 50%; display: inline-block; }
.dot-xhr   { background: var(--xhr); }
.dot-fetch { background: var(--fetch); }

.panel-status {
    margin: 0 0 10px;
    font-size: 12px;
    font-family: var(--mono);
    color: var(--muted);
    padding: 6px 10px;
    border-radius: 6px;
    background: var(--surface-2);
}
.panel-status.is-loading { color: #d29922; }
.panel-status.is-ok      { color: var(--fetch); }
.panel-status.is-error   { color: var(--danger); }

/* 查询条件与来源标记 */
.meta-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 4px 10px;
    margin: 0 0 12px;
    font-size: 12px;
}
.meta-grid dt { color: var(--muted); white-space: nowrap; }
.meta-grid dd { margin: 0; min-width: 0; }
.meta-grid .price { color: var(--price); font-weight: 700; }

.badge {
    display: inline-block;
    font-size: 10px;
    font-weight: 700;
    padding: 1px 6px;
    border-radius: 20px;
    margin-left: 4px;
    vertical-align: 1px;
}
.badge-ajax     { background: rgba(240, 136, 62, .18); color: var(--xhr); }
.badge-fetch    { background: rgba(63, 185, 80, .18);  color: var(--fetch); }
.badge-fallback { background: rgba(139, 155, 176, .18); color: var(--muted); }

/* ---------------------------------------------------------------- 表格 */
.flights { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.flights th, .flights td {
    padding: 7px 6px;
    text-align: left;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}
.flights th {
    color: var(--muted);
    font-weight: 500;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: .04em;
    white-space: nowrap;
}
.flights tbody tr:last-child td { border-bottom: none; }
.flights tbody tr:hover { background: rgba(255, 255, 255, .028); }
.flights .is-cheapest { background: rgba(255, 180, 84, .07); }

.flight-no { display: block; font-family: var(--mono); font-weight: 600; color: #79c0ff; }
.airline   { display: block; color: var(--muted); font-size: 11px; }
.times     { display: block; font-family: var(--mono); white-space: nowrap; }
.duration  { display: block; color: var(--muted); font-size: 11px; }
.aircraft  { color: var(--muted); }

.num { text-align: right; white-space: nowrap; }
.price { color: var(--price); font-weight: 700; font-family: var(--mono); }
.seats { font-family: var(--mono); }
.seats.is-low { color: var(--danger); }

.placeholder { margin: 0; padding: 22px 0; text-align: center; color: var(--muted); font-size: 12.5px; }

/* ---------------------------------------------------------------- 错误框 */
.error-box {
    border: 1px solid rgba(248, 81, 73, .4);
    background: rgba(248, 81, 73, .07);
    border-radius: 8px;
    padding: 12px 14px;
}
.error-main { margin: 0 0 6px; color: var(--danger); font-weight: 600; font-size: 13px; }
.error-raw  { margin: 0 0 10px; font-family: var(--mono); font-size: 11.5px; color: #d5a3a0; word-break: break-all; white-space: pre-line; }
.error-hint { margin: 0; font-size: 11.5px; color: var(--muted); line-height: 1.7; }
.error-hint code { font-size: 11px; }

/* ---------------------------------------------------------------- 说明区 */
.notes h2 { margin: 0 0 10px; font-size: 14px; }
.notes ul { margin: 0; padding-left: 20px; color: #bac7d8; font-size: 13px; }
.notes li { margin-bottom: 6px; }
.notes li strong { color: var(--text); }
.notes-foot { margin: 10px 0 0; font-size: 12px; color: var(--muted); }

/* ---------------------------------------------------------------- 页脚 */
.footer {
    max-width: 1360px;
    margin: 0 auto;
    padding: 8px 24px 0;
    color: #61708a;
    font-size: 12px;
}

/* ---------------------------------------------------------------- 响应式 */
@media (max-width: 1100px) {
    .panels { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
    .wrap { padding: 16px 14px 0; }
    .form-grid { grid-template-columns: 1fr; }
    .btn-swap { justify-self: center; transform: rotate(90deg); }
    .actions { grid-template-columns: 1fr; }
    .flights th:nth-child(3), .flights td:nth-child(3) { display: none; }  /* 窄屏隐藏机型 */
}