/* ==========================================================================
   social-bond.css · 板块四「出行社交」设计系统（.sb 作用域）
   旅途靛蓝 + 社交暖玫 + 琥珀点缀；票根/邮戳/明信片质感；白天/黑夜双主题
   ========================================================================== */

.sb {
    --sb-navy: #2f4b7c;
    --sb-blue: #3d63a0;
    --sb-sky: #5b93c8;
    --sb-rose: #c65d7b;
    --sb-pink: #dd8aa3;
    --sb-amber: #d99a2b;
    --sb-gold: #e3b94d;
    --sb-teal: #3f9a92;
    --sb-green: #5a9a68;
    --sb-red: #c9534c;
    --sb-purple: #7a6aa8;

    --sb-ink: #25303f;
    --sb-sub: #5b6675;
    --sb-faint: #93a0ad;

    --sb-bg: #eef1f6;
    --sb-card: #ffffff;
    --sb-card2: #f4f6fa;
    --sb-line: #e1e6ee;
    --sb-track: #e8ecf2;

    --sb-radius: 18px;
    --sb-shadow: 0 10px 30px rgba(35, 55, 90, .08);
    --sb-shadow-soft: 0 4px 14px rgba(35, 55, 90, .06);
    --sb-font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --sb-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
    --sb-mono: "SFMono-Regular", Consolas, "Courier New", monospace;

    position: relative;
    color: var(--sb-ink);
    font-family: var(--sb-font);
    line-height: 1.7;
}
:root[data-theme="dark"] .sb {
    --sb-navy: #6d8cc4;
    --sb-blue: #7fa3d8;
    --sb-sky: #8fb8e0;
    --sb-rose: #e08aa3;
    --sb-pink: #e8a3b8;
    --sb-amber: #e3b155;
    --sb-gold: #ecc96a;
    --sb-teal: #63b8b0;
    --sb-green: #7fbe8a;
    --sb-red: #e07a73;
    --sb-purple: #a092c8;

    --sb-ink: #e7ecf3;
    --sb-sub: #aeb9c7;
    --sb-faint: #768392;

    --sb-bg: #141922;
    --sb-card: #1c232f;
    --sb-card2: #232c3a;
    --sb-line: #2e3847;
    --sb-track: #2a3340;

    --sb-shadow: 0 10px 30px rgba(0, 0, 0, .35);
    --sb-shadow-soft: 0 4px 14px rgba(0, 0, 0, .3);
}

/* ---------- Hero：票根横幅 ---------- */
.sb-hero {
    position: relative;
    overflow: hidden;
    padding: 40px 38px;
    border-radius: 24px;
    color: #fff;
    background: linear-gradient(125deg, #2f4b7c 0%, #3d63a0 48%, #c65d7b 130%);
    box-shadow: var(--sb-shadow);
}
:root[data-theme="dark"] .sb-hero {
    background: linear-gradient(125deg, #26395c 0%, #324f80 48%, #9c4a63 130%);
}
.sb-hero::before {
    content: "✈";
    position: absolute;
    right: -18px;
    top: -34px;
    font-size: 190px;
    opacity: .10;
    transform: rotate(-12deg);
}
.sb-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 82% 30%, rgba(227, 185, 77, .25), transparent 42%),
        radial-gradient(circle at 12% 88%, rgba(91, 147, 200, .3), transparent 45%);
    pointer-events: none;
}
.sb-breadcrumb { font-size: 13px; opacity: .85; margin-bottom: 14px; position: relative; z-index: 1; }
.sb-breadcrumb a { color: #fff; opacity: .85; }
.sb-breadcrumb a:hover { opacity: 1; }
.sb-hero h1 { position: relative; z-index: 1; font-size: 28px; margin: 0 0 10px; font-weight: 700; letter-spacing: .5px; }
.sb-hero p { position: relative; z-index: 1; margin: 0; max-width: 720px; font-size: 14.5px; opacity: .92; }

/* ---------- 布局 ---------- */
.sb-wrap { max-width: 1080px; margin: 26px auto 0; padding: 0 4px; }
.sb-grid { display: grid; grid-template-columns: 380px 1fr; gap: 22px; align-items: start; }
.sb-card {
    background: var(--sb-card);
    border: 1px solid var(--sb-line);
    border-radius: var(--sb-radius);
    padding: 24px;
    box-shadow: var(--sb-shadow-soft);
}
.sb-card.full { grid-column: 1 / -1; }
.sb-card h2 {
    margin: 0 0 16px; font-size: 17px; font-weight: 700;
    display: flex; align-items: center; gap: 8px;
}
.sb-card h2::before {
    content: ""; width: 5px; height: 17px; border-radius: 3px;
    background: linear-gradient(var(--sb-blue), var(--sb-rose));
}

/* ---------- 表单 ---------- */
.sb-field { margin-bottom: 18px; }
.sb-field:last-child { margin-bottom: 0; }
.sb-field > label { display: block; font-size: 13.5px; font-weight: 600; color: var(--sb-sub); margin-bottom: 8px; }
.sb-input, .sb-select, .sb-textarea {
    width: 100%; box-sizing: border-box;
    padding: 11px 13px; font-size: 14.5px; font-family: inherit;
    color: var(--sb-ink); background: var(--sb-card2);
    border: 1.5px solid var(--sb-line); border-radius: 12px;
    transition: border-color .15s, box-shadow .15s;
}
.sb-input:focus, .sb-select:focus, .sb-textarea:focus {
    outline: none; border-color: var(--sb-blue);
    box-shadow: 0 0 0 3px rgba(61, 99, 160, .14);
}
.sb-textarea { min-height: 78px; resize: vertical; line-height: 1.6; }
.sb-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.sb-row-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.sb-suffix { position: relative; }
.sb-suffix .sb-input { padding-right: 40px; }
.sb-suffix em {
    position: absolute; right: 13px; top: 50%; transform: translateY(-50%);
    font-style: normal; font-size: 13px; color: var(--sb-faint); pointer-events: none;
}

/* ---------- 分段选择 / 芯片 ---------- */
.sb-seg { display: flex; flex-wrap: wrap; gap: 8px; }
.sb-seg button, .sb-chip {
    padding: 8px 15px; font-size: 13.5px; font-family: inherit; cursor: pointer;
    color: var(--sb-sub); background: var(--sb-card2);
    border: 1.5px solid var(--sb-line); border-radius: 999px;
    transition: all .15s;
}
.sb-seg button:hover, .sb-chip:hover { border-color: var(--sb-sky); color: var(--sb-blue); }
.sb-seg button.active, .sb-chip.active {
    color: #fff; background: linear-gradient(120deg, var(--sb-blue), var(--sb-rose));
    border-color: transparent; box-shadow: 0 3px 10px rgba(61, 99, 160, .28);
}
.sb-hint { font-size: 12.5px; color: var(--sb-faint); margin-top: 7px; }

/* ---------- 按钮 ---------- */
.sb-btn {
    width: 100%; padding: 13px; font-size: 15px; font-weight: 600; font-family: inherit;
    color: #fff; cursor: pointer; border: none; border-radius: 13px;
    background: linear-gradient(120deg, var(--sb-blue), var(--sb-rose));
    box-shadow: 0 6px 18px rgba(61, 99, 160, .3);
    transition: transform .12s, box-shadow .15s, opacity .15s;
}
.sb-btn:hover { transform: translateY(-1px); box-shadow: 0 9px 22px rgba(61, 99, 160, .36); }
.sb-btn:active { transform: translateY(0); }
.sb-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.sb-btn.ghost {
    color: var(--sb-sub); background: var(--sb-card2);
    border: 1.5px solid var(--sb-line); box-shadow: none;
}
.sb-btn.amber { background: linear-gradient(120deg, var(--sb-amber), var(--sb-rose)); box-shadow: 0 6px 18px rgba(217, 154, 43, .3); }

/* ---------- 统计四格 ---------- */
.sb-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 22px; }
.sb-stat {
    background: var(--sb-card); border: 1px solid var(--sb-line);
    border-radius: 15px; padding: 16px 17px; box-shadow: var(--sb-shadow-soft);
}
.sb-stat .k { font-size: 12.5px; color: var(--sb-faint); margin-bottom: 6px; }
.sb-stat .v { font-size: 23px; font-weight: 700; font-family: var(--sb-mono); line-height: 1.2; }
.sb-stat .v small { font-size: 12.5px; font-weight: 400; color: var(--sb-faint); font-family: var(--sb-font); margin-left: 3px; }
.sb-stat.is-blue .v { color: var(--sb-blue); }
.sb-stat.is-rose .v { color: var(--sb-rose); }
.sb-stat.is-amber .v { color: var(--sb-amber); }
.sb-stat.is-teal .v { color: var(--sb-teal); }
.sb-stat.is-green .v { color: var(--sb-green); }
.sb-stat.is-red .v { color: var(--sb-red); }

/* ---------- 结果 / 徽章 ---------- */
.sb-verdict {
    border-radius: 15px; padding: 18px 20px; margin-bottom: 16px;
    background: linear-gradient(120deg, rgba(61, 99, 160, .09), rgba(198, 93, 123, .09));
    border: 1px solid var(--sb-line);
}
.sb-verdict .big { font-size: 20px; font-weight: 700; margin-bottom: 4px; }
.sb-verdict .sub { font-size: 13.5px; color: var(--sb-sub); }
.sb-badge {
    display: inline-block; padding: 3px 11px; font-size: 12px; font-weight: 600;
    border-radius: 999px; vertical-align: middle;
}
.sb-badge.ok { color: var(--sb-green); background: rgba(90, 154, 104, .13); }
.sb-badge.warn { color: var(--sb-amber); background: rgba(217, 154, 43, .14); }
.sb-badge.hot { color: var(--sb-rose); background: rgba(198, 93, 123, .13); }
.sb-badge.red { color: var(--sb-red); background: rgba(201, 83, 76, .13); }
.sb-badge.blue { color: var(--sb-blue); background: rgba(61, 99, 160, .12); }
.sb-badge.gray { color: var(--sb-sub); background: var(--sb-track); }

/* ---------- 条目清单 ---------- */
.sb-list { list-style: none; margin: 0; padding: 0; }
.sb-item {
    display: flex; gap: 12px; padding: 13px 4px;
    border-bottom: 1px dashed var(--sb-line); font-size: 14px;
}
.sb-item:last-child { border-bottom: none; }
.sb-item .ico { flex: none; width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center; font-size: 14px; background: var(--sb-card2); }
.sb-item .txt { flex: 1; }
.sb-item .txt b { font-weight: 600; }
.sb-item .txt small { display: block; color: var(--sb-faint); font-size: 12.5px; margin-top: 2px; }

/* ---------- 知识点卡 ---------- */
.sb-tips { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; }
.sb-tip {
    padding: 17px 18px; border-radius: 15px; background: var(--sb-card2);
    border: 1px solid var(--sb-line);
}
.sb-tip .th { font-weight: 700; font-size: 14.5px; margin-bottom: 7px; display: flex; gap: 7px; align-items: center; }
.sb-tip p { margin: 0; font-size: 13.3px; color: var(--sb-sub); line-height: 1.7; }

/* ---------- 表格 ---------- */
.sb-table { width: 100%; border-collapse: collapse; font-size: 13.8px; }
.sb-table th, .sb-table td { padding: 11px 13px; text-align: left; border-bottom: 1px solid var(--sb-line); }
.sb-table th { color: var(--sb-sub); font-weight: 600; font-size: 12.8px; background: var(--sb-card2); }
.sb-table tr:last-child td { border-bottom: none; }
.sb-table td.num, .sb-table th.num { text-align: right; font-family: var(--sb-mono); }
.sb-table tr.is-best td { background: rgba(90, 154, 104, .08); }

/* ---------- AI 生成结果 ---------- */
.sb-loading { display: flex; align-items: center; gap: 12px; padding: 24px; color: var(--sb-sub); font-size: 14px; justify-content: center; }
.sb-spinner {
    width: 22px; height: 22px; border-radius: 50%;
    border: 3px solid var(--sb-track); border-top-color: var(--sb-blue);
    animation: sb-spin .8s linear infinite;
}
@keyframes sb-spin { to { transform: rotate(360deg); } }

.sb-gen .sb-gen-item { margin-bottom: 18px; }
.sb-gen .sb-gen-item:last-child { margin-bottom: 0; }
.sb-gen .gh {
    display: flex; align-items: center; justify-content: space-between; gap: 10px;
    margin-bottom: 9px;
}
.sb-gen .gh .gt { font-weight: 700; font-size: 14.5px; display: flex; align-items: center; gap: 8px; }
.sb-copy {
    flex: none; padding: 5px 13px; font-size: 12.5px; font-family: inherit; cursor: pointer;
    color: var(--sb-blue); background: transparent; border: 1.5px solid var(--sb-line);
    border-radius: 999px; transition: all .15s;
}
.sb-copy:hover { border-color: var(--sb-blue); background: var(--sb-card2); }
.sb-copy.done { color: var(--sb-green); border-color: var(--sb-green); }
.sb-gen .body {
    white-space: pre-wrap; font-size: 14.3px; line-height: 1.85;
    background: var(--sb-card2); border: 1px solid var(--sb-line);
    border-radius: 13px; padding: 16px 18px;
}
.sb-gen .meta { margin-top: 8px; font-size: 12.5px; color: var(--sb-faint); }
.sb-gen .meta .sb-badge { margin-right: 6px; }
.sb-empty { text-align: center; padding: 48px 20px; color: var(--sb-faint); font-size: 14px; }
.sb-empty .em { font-size: 44px; display: block; margin-bottom: 12px; opacity: .7; }

/* ---------- 邮戳/明信片（请柬等装饰） ---------- */
.sb-stamp {
    display: inline-flex; align-items: center; gap: 6px; padding: 5px 14px;
    border: 1.5px dashed var(--sb-amber); border-radius: 999px;
    color: var(--sb-amber); font-size: 12.5px; font-weight: 600;
}

/* ---------- 提示条 ---------- */
.sb-note {
    margin-top: 20px; padding: 14px 18px; border-radius: 13px; font-size: 13.3px;
    background: var(--sb-card2); border: 1px solid var(--sb-line); color: var(--sb-sub);
}
.sb-note.warn { border-left: 4px solid var(--sb-amber); }
.sb-note.red { border-left: 4px solid var(--sb-red); }
.sb-note b { color: var(--sb-ink); }

/* ---------- 保存提示 ---------- */
.sb-saved {
    position: fixed; right: 26px; bottom: 26px; z-index: 99;
    padding: 11px 20px; border-radius: 12px; font-size: 13.5px; color: #fff;
    background: rgba(37, 48, 63, .92); box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
    opacity: 0; transform: translateY(12px); pointer-events: none;
    transition: opacity .2s, transform .2s;
}
.sb-saved.show { opacity: 1; transform: translateY(0); }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .sb-grid { grid-template-columns: 1fr; }
    .sb-stats { grid-template-columns: repeat(2, 1fr); }
    .sb-tips { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
    .sb-hero { padding: 28px 22px; }
    .sb-hero h1 { font-size: 22px; }
    .sb-card { padding: 19px; }
    .sb-row, .sb-row-3 { grid-template-columns: 1fr; }
    .sb-stats { grid-template-columns: 1fr 1fr; gap: 10px; }
    .sb-stat .v { font-size: 19px; }
}

/* ---------- 打印 ---------- */
@media print {
    .sb-hero, .sb-breadcrumb, .sb-saved, .sb-btn, .sb-copy, .no-print { display: none !important; }
    .sb { --sb-bg: #fff; }
    .sb-card, .sb-stat { box-shadow: none; border-color: #ccc; break-inside: avoid; }
    .sb-grid, .sb-stats { display: block; }
    .sb-stat { display: inline-block; width: 46%; margin: 4px; }
}