/* ======================================================================
 *  二手车残值估算 /used-car-residual.css
 *  风格：汽车仪表盘风（琥珀金主调 + 深色玻璃质感），区别于通用 calc 蓝。
 *  复用站点全局变量（home.css），自动支持 [data-theme="dark"] 黑夜模式。
 * ====================================================================== */

.uc-wrap {
    --uc-accent: #f59e0b;
    --uc-accent-2: #f97316;
    --uc-accent-soft: rgba(245, 158, 11, 0.12);
    --uc-good: #16a34a;
    --uc-warn: #e0447c;
    --uc-chip-bg: var(--c-surface-soft);
    --uc-line: var(--c-border);
    --uc-text: var(--c-text);
    --uc-text-sub: var(--c-text-sub);
    --uc-text-muted: var(--c-text-muted);
    --uc-surface: var(--c-surface);
    --uc-surface-soft: var(--c-surface-soft);
    --uc-shadow: var(--shadow-sm);
    font-family: var(--font-sans, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif);
}

[data-theme="dark"] .uc-wrap {
    --uc-accent: #fbbf24;
    --uc-accent-2: #fb923c;
    --uc-accent-soft: rgba(251, 191, 36, 0.14);
    --uc-good: #4ede78;
    --uc-warn: #ff7ab0;
}

.uc-container { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

/* ---------- 顶部 Hero ---------- */
.uc-hero {
    position: relative;
    margin: 18px 0 22px;
    padding: 26px 28px;
    border-radius: 20px;
    background: linear-gradient(120deg, rgba(245,158,11,0.14), rgba(249,115,22,0.08));
    border: 1px solid var(--uc-line);
    overflow: hidden;
}
.uc-hero::after {
    content: "🚗";
    position: absolute;
    right: 18px; top: -8px;
    font-size: 92px;
    opacity: .14;
    transform: rotate(-8deg);
}
.uc-hero h1 {
    margin: 0 0 6px;
    font-size: 26px;
    font-weight: 800;
    letter-spacing: .5px;
    color: var(--uc-text);
}
.uc-hero p {
    margin: 0;
    font-size: 14px;
    line-height: 1.7;
    color: var(--uc-text-sub);
    max-width: 760px;
}
.uc-hero .uc-tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 8px; }
.uc-tag {
    font-size: 12px;
    font-weight: 700;
    padding: 4px 11px;
    border-radius: 99px;
    background: var(--uc-accent-soft);
    color: var(--uc-accent);
    border: 1px solid rgba(245,158,11,0.3);
}

/* ---------- 双栏布局 ---------- */
.uc-grid {
    display: grid;
    grid-template-columns: 360px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
}
@media (max-width: 880px) {
    .uc-grid { grid-template-columns: 1fr; }
}

/* ---------- 左侧配置舱 ---------- */
.uc-config {
    position: sticky;
    top: 16px;
    background: var(--uc-surface);
    border: 1px solid var(--uc-line);
    border-radius: 18px;
    padding: 20px;
    box-shadow: var(--uc-shadow);
}
@media (max-width: 880px) { .uc-config { position: static; } }

.uc-config h2 {
    margin: 0 0 16px;
    font-size: 16px;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--uc-text);
}
.uc-config h2 .uc-dot {
    width: 9px; height: 9px; border-radius: 50%;
    background: var(--uc-accent);
    box-shadow: 0 0 0 4px var(--uc-accent-soft);
}

.uc-field { margin-bottom: 16px; }
.uc-field > label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 7px;
    color: var(--uc-text-sub);
}
.uc-field .uc-val {
    float: right;
    font-weight: 800;
    color: var(--uc-accent);
    font-variant-numeric: tabular-nums;
}

/* 分段控制器 */
.uc-seg {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}
.uc-seg button {
    flex: 1 1 auto;
    min-width: 64px;
    padding: 8px 6px;
    font-size: 12.5px;
    font-weight: 700;
    border-radius: 11px;
    border: 1px solid var(--uc-line);
    background: var(--uc-surface-soft);
    color: var(--uc-text-sub);
    cursor: pointer;
    transition: all .15s ease;
}
.uc-seg button:hover { border-color: var(--uc-accent); }
.uc-seg button.active {
    background: var(--uc-accent);
    border-color: var(--uc-accent);
    color: #1a1205;
}

/* 输入框 + 滑杆 */
.uc-input {
    width: 100%;
    padding: 10px 12px;
    font-size: 15px;
    border-radius: 11px;
    border: 1px solid var(--uc-line);
    background: var(--uc-surface-soft);
    color: var(--uc-text);
    font-variant-numeric: tabular-nums;
}
.uc-input:focus { outline: none; border-color: var(--uc-accent); box-shadow: 0 0 0 3px var(--uc-accent-soft); }
.uc-range {
    width: 100%;
    margin-top: 9px;
    accent-color: var(--uc-accent);
    cursor: pointer;
}
.uc-hint {
    margin: 7px 0 0;
    font-size: 11.5px;
    line-height: 1.5;
    color: var(--uc-text-muted);
}

.uc-btns { display: flex; gap: 10px; margin-top: 6px; }
.uc-btn {
    flex: 1;
    padding: 12px;
    font-size: 14px;
    font-weight: 800;
    border-radius: 12px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .1s ease, filter .15s ease;
}
.uc-btn:active { transform: translateY(1px); }
.uc-btn-primary { background: linear-gradient(135deg, var(--uc-accent), var(--uc-accent-2)); color: #1a1205; }
.uc-btn-primary:hover { filter: brightness(1.05); }
.uc-btn-ghost { background: var(--uc-surface-soft); border-color: var(--uc-line); color: var(--uc-text-sub); }
.uc-btn-ghost:hover { border-color: var(--uc-accent); }

/* ---------- 右侧结果舱 ---------- */
.uc-result { display: flex; flex-direction: column; gap: 18px; }
.uc-card {
    background: var(--uc-surface);
    border: 1px solid var(--uc-line);
    border-radius: 18px;
    padding: 20px;
    box-shadow: var(--uc-shadow);
}
.uc-card h3 {
    margin: 0 0 14px;
    font-size: 15px;
    font-weight: 800;
    color: var(--uc-text);
    display: flex; align-items: center; gap: 8px;
}

/* 空状态 */
.uc-empty {
    text-align: center;
    padding: 56px 20px;
    color: var(--uc-text-muted);
}
.uc-empty .uc-emoji { font-size: 54px; opacity: .6; }
.uc-empty p { margin: 12px 0 0; font-size: 14px; }

/* 残值主仪表：环形 + 数字 */
.uc-gauge-row { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.uc-donut {
    --p: 0;
    width: 150px; height: 150px;
    border-radius: 50%;
    flex: none;
    background:
        conic-gradient(var(--uc-accent) calc(var(--p) * 1%), var(--uc-surface-soft) 0);
    display: grid;
    place-items: center;
    position: relative;
}
.uc-donut::before {
    content: "";
    position: absolute;
    inset: 16px;
    border-radius: 50%;
    background: var(--uc-surface);
    border: 1px solid var(--uc-line);
}
.uc-donut .uc-donut-inner { position: relative; text-align: center; }
.uc-donut .uc-num { font-size: 30px; font-weight: 900; color: var(--uc-accent); font-variant-numeric: tabular-nums; }
.uc-donut .uc-num small { font-size: 14px; font-weight: 700; }
.uc-donut .uc-lab { font-size: 11px; color: var(--uc-text-muted); margin-top: 2px; }

.uc-price-box { flex: 1; min-width: 200px; }
.uc-price-box .uc-range-lab { font-size: 12.5px; color: var(--uc-text-muted); }
.uc-price-box .uc-range-val {
    font-size: 28px;
    font-weight: 900;
    color: var(--uc-text);
    font-variant-numeric: tabular-nums;
    line-height: 1.25;
}
.uc-price-box .uc-range-val .uc-unit { font-size: 15px; font-weight: 700; color: var(--uc-text-sub); }
.uc-price-box .uc-base {
    margin-top: 8px;
    font-size: 12.5px;
    color: var(--uc-text-sub);
}
.uc-price-box .uc-base b { color: var(--uc-warn); }

/* 因素分解条 */
.uc-factors { display: flex; flex-direction: column; gap: 11px; }
.uc-factor { }
.uc-factor .uc-f-top { display: flex; justify-content: space-between; font-size: 12.5px; margin-bottom: 5px; }
.uc-factor .uc-f-top .k { color: var(--uc-text-sub); font-weight: 600; }
.uc-factor .uc-f-top .v { font-weight: 800; font-variant-numeric: tabular-nums; }
.uc-factor .uc-f-top .v.pos { color: var(--uc-good); }
.uc-factor .uc-f-top .v.neg { color: var(--uc-warn); }
.uc-bar { height: 9px; border-radius: 99px; background: var(--uc-surface-soft); overflow: hidden; }
.uc-bar > i {
    display: block; height: 100%; border-radius: 99px;
    background: linear-gradient(90deg, var(--uc-accent), var(--uc-accent-2));
}
.uc-bar > i.neg { background: linear-gradient(90deg, #ef4444, var(--uc-warn)); }
.uc-bar > i.pos { background: linear-gradient(90deg, #22c55e, var(--uc-good)); }

/* 折旧曲线 */
.uc-curve { display: flex; align-items: flex-end; gap: 6px; height: 160px; padding-top: 6px; }
.uc-curve .uc-col {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    height: 100%;
    position: relative;
}
.uc-curve .uc-col .uc-bar-v {
    width: 100%;
    max-width: 30px;
    border-radius: 6px 6px 3px 3px;
    background: linear-gradient(180deg, var(--uc-accent), var(--uc-accent-2));
    position: relative;
    transition: height .4s ease;
}
.uc-curve .uc-col.is-now .uc-bar-v { background: linear-gradient(180deg, #16a34a, #22c55e); }
.uc-curve .uc-col .uc-yr { font-size: 10.5px; color: var(--uc-text-muted); margin-top: 6px; }
.uc-curve .uc-col .uc-pct {
    position: absolute;
    top: -17px;
    font-size: 10px;
    font-weight: 700;
    color: var(--uc-text-sub);
    white-space: nowrap;
}
.uc-curve-cap { margin-top: 10px; font-size: 11.5px; color: var(--uc-text-muted); }

/* 渠道建议卡 */
.uc-channels { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 560px) { .uc-channels { grid-template-columns: 1fr; } }
.uc-chan {
    border: 1px solid var(--uc-line);
    border-radius: 14px;
    padding: 14px;
    background: var(--uc-surface-soft);
}
.uc-chan .uc-chan-h { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.uc-chan .uc-chan-h .ic { font-size: 20px; }
.uc-chan .uc-chan-h b { font-size: 14px; color: var(--uc-text); }
.uc-chan .uc-chan-price { font-size: 18px; font-weight: 900; color: var(--uc-accent); font-variant-numeric: tabular-nums; }
.uc-chan .uc-chan-price small { font-size: 12px; color: var(--uc-text-sub); font-weight: 700; }
.uc-chan ul { margin: 8px 0 0; padding-left: 16px; font-size: 12px; line-height: 1.7; color: var(--uc-text-sub); }
.uc-chan .uc-best {
    display: inline-block;
    margin-top: 9px;
    font-size: 11px;
    font-weight: 800;
    color: var(--uc-good);
    background: rgba(22,163,74,0.12);
    padding: 3px 9px;
    border-radius: 99px;
}

/* 结论提示框 */
.uc-note {
    border-radius: 14px;
    padding: 14px 16px;
    font-size: 13px;
    line-height: 1.75;
    background: var(--uc-accent-soft);
    border: 1px solid rgba(245,158,11,0.32);
    color: var(--uc-text-sub);
}
.uc-note b { color: var(--uc-text); }

/* ---------- 信息区（沿用站点信息块，但用 uc 容器） ---------- */
.uc-info { margin-top: 26px; }
.uc-info .uc-badges { display: flex; flex-wrap: wrap; gap: 8px; margin: 10px 0 14px; }
.uc-info .uc-desc { font-size: 14px; line-height: 1.8; color: var(--uc-text-sub); }
.uc-info .uc-meta { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px,1fr)); gap: 10px; margin-top: 14px; }
.uc-info .uc-meta .item { background: var(--uc-surface-soft); border: 1px solid var(--uc-line); border-radius: 12px; padding: 10px 12px; }
.uc-info .uc-meta .item .k { font-size: 11.5px; color: var(--uc-text-muted); }
.uc-info .uc-meta .item .v { font-size: 13px; font-weight: 700; color: var(--uc-text); margin-top: 3px; }

.uc-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 24px 0 14px; border-bottom: 1px solid var(--uc-line); }
.uc-tabs button {
    padding: 9px 14px;
    font-size: 13.5px;
    font-weight: 700;
    border: none;
    background: none;
    color: var(--uc-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
}
.uc-tabs button.active { color: var(--uc-accent); border-bottom-color: var(--uc-accent); }
.uc-panel { display: none; }
.uc-panel.active { display: block; }
.uc-panel h4 { font-size: 15px; color: var(--uc-text); margin: 6px 0 12px; }
.uc-panel p, .uc-panel li { font-size: 13.5px; line-height: 1.8; color: var(--uc-text-sub); }
.uc-panel ol { padding-left: 20px; }
.uc-steps li { margin-bottom: 8px; }
.uc-faq details { border: 1px solid var(--uc-line); border-radius: 12px; padding: 12px 14px; margin-bottom: 10px; background: var(--uc-surface-soft); }
.uc-faq summary { font-weight: 700; cursor: pointer; color: var(--uc-text); font-size: 13.5px; }
.uc-faq .uc-a { margin-top: 9px; font-size: 13px; line-height: 1.75; color: var(--uc-text-sub); }
.uc-changelog li { list-style: none; margin-bottom: 10px; font-size: 13px; color: var(--uc-text-sub); }
.uc-changelog .ver { font-weight: 800; color: var(--uc-accent); margin-right: 8px; }
.uc-changelog .date { color: var(--uc-text-muted); margin-right: 8px; font-size: 12px; }

/* 相关工具 */
.uc-related { margin-top: 26px; }
.uc-related h3 { font-size: 16px; color: var(--uc-text); margin: 0 0 12px; }
.uc-rel-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px,1fr)); gap: 12px; }
.uc-rel-item {
    display: flex; align-items: center; gap: 12px;
    padding: 13px 15px;
    border: 1px solid var(--uc-line);
    border-radius: 14px;
    background: var(--uc-surface);
    text-decoration: none;
    color: var(--uc-text);
    transition: border-color .15s ease, transform .1s ease;
}
.uc-rel-item:hover { border-color: var(--uc-accent); transform: translateY(-2px); }
.uc-rel-item .uc-rel-ic { font-size: 22px; }
.uc-rel-item b { font-size: 13.5px; display: block; }
.uc-rel-item small { font-size: 11.5px; color: var(--uc-text-muted); }
.uc-rel-item .uc-rel-go { margin-left: auto; color: var(--uc-accent); font-weight: 800; }

.uc-disclaim {
    margin-top: 22px;
    font-size: 12px;
    line-height: 1.7;
    color: var(--uc-text-muted);
    background: var(--uc-surface-soft);
    border: 1px dashed var(--uc-line);
    border-radius: 12px;
    padding: 12px 14px;
}

.uc-back-top {
    position: fixed; right: 18px; bottom: 22px;
    width: 44px; height: 44px; border-radius: 50%;
    border: 1px solid var(--uc-line);
    background: var(--uc-accent); color: #1a1205;
    font-size: 18px; font-weight: 800; cursor: pointer;
    display: none; z-index: 50;
}

@media (max-width: 620px) {
    .uc-hero { padding: 20px; }
    .uc-hero h1 { font-size: 22px; }
}