/* ==========================================================================
   卫生间翻新费用计算器 /tool/bathroom-renovation-cost
   独立设计「卫浴预算样板间」：青瓷釉主色 + 陶土橘点缀 + 瓷砖缝网格肌理
   圆角大、层次柔、数字等宽；深浅主题由导航栏主题按钮（data-theme）驱动
   ========================================================================== */

.brc-page {
    /* 主色：青瓷釉 */
    --brc-teal: #0e7a86;
    --brc-teal-d: #0a5d67;
    --brc-teal-l: #e3f2f3;
    --brc-teal-line: rgba(14, 122, 134, 0.22);
    /* 点缀：陶土橘 */
    --brc-clay: #cf6a45;
    --brc-clay-l: #fbece5;
    --brc-clay-line: rgba(207, 106, 69, 0.26);
    /* 分档色 */
    --brc-t-eco: #2f9c86;
    --brc-t-std: #0e7a86;
    --brc-t-pro: #b5643c;
    /* 分项色 */
    --brc-c-demolish: #93a4ac;
    --brc-c-waterproof: #2b8f9e;
    --brc-c-tile: #cf6a45;
    --brc-c-sanitary: #7a6bc9;
    --brc-c-ceiling: #3f9d6f;
    --brc-c-plumbing: #cf9a2e;
    --brc-c-extra: #b4556e;
    --brc-c-fee: #79868f;
    /* 中性 */
    --brc-bg: #f1f5f5;
    --brc-card: #ffffff;
    --brc-card-2: #f7fafa;
    --brc-ink: #12262b;
    --brc-sub: #4e686e;
    --brc-mute: #89a0a6;
    --brc-line: #e0ebec;
    --brc-line-2: #eef4f5;
    --brc-ok: #1f7a5c;
    --brc-warn: #b8622c;
    --brc-err: #c0402f;
    --brc-r: 20px;
    --brc-r-md: 14px;
    --brc-r-sm: 10px;
    --brc-shadow: 0 8px 24px rgba(13, 66, 72, 0.07);
    --brc-shadow-lg: 0 22px 50px rgba(10, 58, 64, 0.16);
    --brc-ring: 0 0 0 3px rgba(14, 122, 134, 0.18);
    --brc-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --brc-num: "DIN Alternate", "Bahnschrift", ui-monospace, "SFMono-Regular", "Roboto Mono", Consolas, monospace;
    padding-bottom: 8px;
    color: var(--brc-ink);
    font-family: var(--brc-font);
    line-height: 1.7;
}

[data-theme="dark"] .brc-page {
    --brc-teal: #58d2c8;
    --brc-teal-d: #8ce6de;
    --brc-teal-l: rgba(88, 210, 200, 0.13);
    --brc-teal-line: rgba(88, 210, 200, 0.3);
    --brc-clay: #ff9c7c;
    --brc-clay-l: rgba(255, 156, 124, 0.13);
    --brc-clay-line: rgba(255, 156, 124, 0.32);
    --brc-t-eco: #45c3a8;
    --brc-t-std: #58d2c8;
    --brc-t-pro: #e8a173;
    --brc-c-demolish: #7d9199;
    --brc-c-waterproof: #3fb2c4;
    --brc-c-tile: #e08a63;
    --brc-c-sanitary: #a294e8;
    --brc-c-ceiling: #52c188;
    --brc-c-plumbing: #e6b44f;
    --brc-c-extra: #e0758f;
    --brc-c-fee: #8d9ba4;
    --brc-bg: #0c1416;
    --brc-card: #141f23;
    --brc-card-2: #182529;
    --brc-ink: #e7f1f1;
    --brc-sub: #b3c6c9;
    --brc-mute: #7f979c;
    --brc-line: #24343a;
    --brc-line-2: #1c2a2f;
    --brc-ok: #4fc090;
    --brc-warn: #e2a06a;
    --brc-err: #f08475;
    --brc-shadow: 0 10px 26px rgba(0, 0, 0, 0.42);
    --brc-shadow-lg: 0 24px 54px rgba(0, 0, 0, 0.55);
    --brc-ring: 0 0 0 3px rgba(88, 210, 200, 0.25);
}

.brc-page *,
.brc-page *::before,
.brc-page *::after { box-sizing: border-box; }
.brc-page [hidden] { display: none !important; }
.brc-page h1, .brc-page h2, .brc-page h3, .brc-page h4 { font-family: var(--brc-font); }
.brc-page a { color: var(--brc-teal); text-decoration: none; }
.brc-page a:hover { color: var(--brc-teal-d); }

/* ============================ 面包屑 ============================ */
.brc-crumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 7px;
    margin: 0 0 14px;
    font-size: 13px;
    color: var(--brc-mute);
}
.brc-crumb a { color: var(--brc-sub); }
.brc-crumb a:hover { color: var(--brc-teal); }
.brc-crumb .sep { opacity: 0.45; }
.brc-crumb .cur { color: var(--brc-ink); font-weight: 700; }

/* ============================ 首屏 ============================ */
.brc-hero {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 348px;
    gap: 30px;
    align-items: center;
    padding: 34px 34px 34px;
    margin-bottom: 22px;
    border-radius: 26px;
    overflow: hidden;
    color: #eaf6f6;
    background:
        radial-gradient(120% 130% at 88% 0%, rgba(88, 210, 200, 0.28) 0%, rgba(88, 210, 200, 0) 55%),
        linear-gradient(135deg, #0a4d57 0%, #0e7a86 52%, #128a93 100%);
    box-shadow: var(--brc-shadow-lg);
}
/* 瓷砖缝网格肌理 */
.brc-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        linear-gradient(rgba(255, 255, 255, 0.075) 1px, transparent 1px) 0 0 / 44px 44px,
        linear-gradient(90deg, rgba(255, 255, 255, 0.075) 1px, transparent 1px) 0 0 / 44px 44px;
    mask-image: linear-gradient(100deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.25));
    -webkit-mask-image: linear-gradient(100deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.25));
    pointer-events: none;
}
.brc-hero > * { position: relative; z-index: 1; }

.brc-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 5px 13px;
    border: 1px solid rgba(255, 255, 255, 0.26);
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.1);
    font-size: 12.5px;
    letter-spacing: 0.06em;
    color: #d6f3f1;
}
.brc-eyebrow::before {
    content: "";
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #ffd9a0;
    box-shadow: 0 0 0 4px rgba(255, 217, 160, 0.22);
}
.brc-hero h1 {
    margin: 16px 0 12px;
    font-size: clamp(26px, 3.4vw, 40px);
    line-height: 1.26;
    font-weight: 800;
    letter-spacing: -0.01em;
    color: #fff;
}
.brc-hero h1 b {
    font-weight: 800;
    color: #ffd9a0;
}
.brc-lead {
    margin: 0 0 18px;
    max-width: 640px;
    font-size: 15px;
    line-height: 1.95;
    color: rgba(233, 248, 247, 0.88);
}
.brc-lead b { color: #fff; font-weight: 700; }
.brc-points {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin: 0;
    padding: 0;
    list-style: none;
}
.brc-points li {
    padding: 7px 13px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.16);
    font-size: 13px;
    color: rgba(236, 250, 249, 0.92);
}
.brc-points li b { color: #ffd9a0; font-weight: 700; }

/* 首屏分项速览 */
.brc-mini {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin: 18px 0 0;
    padding: 0;
    list-style: none;
    max-width: 560px;
}
.brc-mini li {
    padding: 9px 12px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
}
.brc-mini span { display: block; font-size: 11.5px; color: rgba(233, 248, 247, 0.75); }
.brc-mini b {
    display: block;
    margin-top: 2px;
    font-family: var(--brc-num);
    font-size: 15px;
    font-weight: 800;
    color: #fff;
    letter-spacing: -0.01em;
}

/* ---- 首屏速算卡（工具入口） ---- */
[data-theme="dark"] .brc-hero {
    background:
        radial-gradient(120% 130% at 88% 0%, rgba(88, 210, 200, 0.17) 0%, rgba(88, 210, 200, 0) 55%),
        linear-gradient(135deg, #073038 0%, #0c4a53 52%, #105c65 100%);
}
.brc-quick {
    padding: 20px 20px 18px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.97);
    color: var(--brc-ink);
    box-shadow: 0 18px 40px rgba(3, 36, 40, 0.3);
}
[data-theme="dark"] .brc-quick { background: rgba(16, 30, 34, 0.96); }
.brc-quick-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 14px;
}
.brc-quick-head b { font-size: 15px; font-weight: 800; letter-spacing: 0.01em; }
.brc-quick-head span { font-size: 12px; color: var(--brc-mute); }
.brc-quick-row { margin-bottom: 13px; }
.brc-quick-row > label {
    display: block;
    margin-bottom: 6px;
    font-size: 12.5px;
    font-weight: 700;
    color: var(--brc-sub);
}
.brc-quick-row .brc-hint {
    margin: 6px 0 0;
    font-size: 12px;
    line-height: 1.6;
    color: var(--brc-mute);
}
.brc-area-line { display: flex; align-items: center; gap: 12px; }
.brc-area-line input[type="range"] {
    flex: 1;
    min-width: 0;
    height: 6px;
    border-radius: 999px;
    background: var(--brc-teal-l);
    accent-color: var(--brc-teal);
    cursor: pointer;
}
.brc-quick-cta {
    width: 100%;
    margin-top: 4px;
    padding: 13px 16px;
    border-radius: 14px;
    font-size: 15.5px;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--brc-teal-d), var(--brc-teal));
    box-shadow: 0 10px 22px rgba(14, 122, 134, 0.28);
    transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
}
.brc-quick-cta:hover { filter: brightness(1.06); box-shadow: 0 14px 28px rgba(14, 122, 134, 0.34); }
.brc-quick-cta:active { transform: translateY(1px); }
.brc-quick-cta:focus-visible { outline: none; box-shadow: var(--brc-ring), 0 10px 22px rgba(14, 122, 134, 0.28); }
.brc-quick-live {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 10px;
    margin-top: 14px;
    padding-top: 13px;
    border-top: 1px dashed var(--brc-line);
    font-size: 13px;
    color: var(--brc-sub);
}
.brc-quick-live b {
    font-family: var(--brc-num);
    font-size: 25px;
    font-weight: 800;
    color: var(--brc-clay);
    letter-spacing: -0.01em;
}

/* ============================ 主体布局 ============================ */
.brc-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 384px;
    gap: 22px;
    align-items: start;
}
.brc-col { min-width: 0; }
.brc-sticky { position: sticky; top: 16px; }

/* ============================ 卡片 ============================ */
.brc-card {
    background: var(--brc-card);
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r);
    box-shadow: var(--brc-shadow);
    overflow: hidden;
}
.brc-card + .brc-card { margin-top: 18px; }
.brc-card-head {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 16px 20px;
    border-bottom: 1px solid var(--brc-line-2);
    background: var(--brc-card-2);
}
.brc-card-head .no {
    flex: none;
    display: grid;
    place-items: center;
    min-width: 27px;
    height: 27px;
    border-radius: 9px;
    background: var(--brc-teal);
    color: #fff;
    font-family: var(--brc-num);
    font-size: 13px;
    font-weight: 700;
    line-height: 1;
    box-sizing: border-box;
    overflow: hidden;
}
/* 两个字以上的文字徽标：自适应宽度、改用正文字体，避免 27px 装不下汉字而糊成一团 */
.brc-card-head .no.is-txt {
    padding: 0 9px;
    font-family: var(--brc-font);
    font-size: 12px;
    letter-spacing: 0.04em;
    border-radius: 8px;
}
.brc-card-head h2 { margin: 0; font-size: 16px; font-weight: 800; letter-spacing: 0.01em; }
.brc-card-head .tip { margin-left: auto; font-size: 12.5px; color: var(--brc-mute); }
.brc-card-body { padding: 18px 20px 20px; }

/* ============================ 表单 ============================ */
.brc-fields {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 16px;
}
.brc-field { display: block; min-width: 0; }
.brc-field.is-full { grid-column: 1 / -1; }
.brc-label {
    display: flex;
    align-items: baseline;
    gap: 7px;
    margin-bottom: 7px;
    font-size: 13px;
    font-weight: 700;
    color: var(--brc-sub);
}
.brc-label small { font-size: 11.5px; font-weight: 500; color: var(--brc-mute); }
.brc-input, .brc-select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r-sm);
    background: var(--brc-card-2);
    color: var(--brc-ink);
    font-size: 15px;
    font-family: inherit;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}
.brc-input:focus, .brc-select:focus {
    border-color: var(--brc-teal);
    background: var(--brc-card);
    box-shadow: var(--brc-ring);
}
.brc-select { appearance: none; cursor: pointer; padding-right: 34px;
    background-image: linear-gradient(45deg, transparent 50%, var(--brc-mute) 50%), linear-gradient(135deg, var(--brc-mute) 50%, transparent 50%);
    background-position: calc(100% - 17px) 18px, calc(100% - 12px) 18px;
    background-size: 5px 5px, 5px 5px;
    background-repeat: no-repeat;
}
[data-theme="dark"] .brc-select {
    background-image: linear-gradient(45deg, transparent 50%, var(--brc-mute) 50%), linear-gradient(135deg, var(--brc-mute) 50%, transparent 50%);
}
.brc-unit-wrap { position: relative; display: flex; align-items: center; }
.brc-unit-wrap .brc-input { padding-right: 40px; }
.brc-unit {
    position: absolute;
    right: 12px;
    font-size: 13px;
    color: var(--brc-mute);
    pointer-events: none;
}
.brc-textarea {
    width: 100%;
    min-height: 78px;
    padding: 11px 13px;
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r-sm);
    background: var(--brc-card-2);
    color: var(--brc-ink);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.75;
    resize: vertical;
    outline: none;
}
.brc-textarea:focus { border-color: var(--brc-teal); background: var(--brc-card); box-shadow: var(--brc-ring); }
.brc-counter { margin: 6px 0 0; font-size: 12px; color: var(--brc-mute); text-align: right; }

/* 分段控件 */
.brc-seg {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: 1fr;
    gap: 4px;
    padding: 4px;
    border-radius: 12px;
    background: var(--brc-card-2);
    border: 1px solid var(--brc-line);
}
.brc-seg button {
    padding: 9px 6px;
    border-radius: 9px;
    font-size: 13.5px;
    font-weight: 700;
    color: var(--brc-sub);
    background: transparent;
    transition: background 0.15s ease, color 0.15s ease, box-shadow 0.15s ease;
    white-space: nowrap;
}
.brc-seg button:hover { color: var(--brc-ink); }
.brc-seg button.on {
    background: var(--brc-card);
    color: var(--brc-teal);
    box-shadow: 0 2px 8px rgba(16, 70, 76, 0.12);
}
[data-theme="dark"] .brc-seg button.on { background: #22333a; color: var(--brc-teal-d); }
.brc-seg button:focus-visible { outline: none; box-shadow: var(--brc-ring); }
.brc-seg small { display: block; font-size: 11px; font-weight: 500; opacity: 0.72; margin-top: 1px; }

/* 开关 */
.brc-switch { position: relative; display: inline-block; width: 42px; height: 24px; flex: none; }
.brc-switch input { position: absolute; opacity: 0; width: 0; height: 0; }
.brc-switch i {
    position: absolute;
    inset: 0;
    border-radius: 999px;
    background: var(--brc-line);
    transition: background 0.18s ease;
}
.brc-switch i::after {
    content: "";
    position: absolute;
    top: 3px;
    left: 3px;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
    transition: transform 0.18s ease;
}
.brc-switch input:checked + i { background: var(--brc-teal); }
.brc-switch input:checked + i::after { transform: translateX(18px); }
.brc-switch input:focus-visible + i { box-shadow: var(--brc-ring); }

/* 错误提示 */
.brc-err {
    display: none;
    margin: 14px 0 0;
    padding: 10px 14px;
    border-radius: var(--brc-r-sm);
    border: 1px solid var(--brc-clay-line);
    background: var(--brc-clay-l);
    color: var(--brc-warn);
    font-size: 13.5px;
    font-weight: 600;
}
.brc-err.is-on { display: block; }

/* ============================ 改造项目清单 ============================ */
.brc-items { display: grid; gap: 11px; }
.brc-item {
    display: grid;
    grid-template-columns: 42px minmax(0, 1fr) auto;
    gap: 13px;
    align-items: start;
    padding: 14px 15px;
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r-md);
    background: var(--brc-card);
    transition: opacity 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}
.brc-item.is-off { opacity: 0.48; background: var(--brc-card-2); }
.brc-item.is-off .brc-item-name { text-decoration: line-through; text-decoration-color: var(--brc-mute); }
.brc-item-ico {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 13px;
    background: var(--brc-teal-l);
    color: var(--brc-teal);
}
.brc-item-ico svg { width: 21px; height: 21px; }
.brc-item-name { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 800; }
.brc-item-name .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--brc-teal); flex: none; }
.brc-item-desc { margin: 5px 0 0; font-size: 12.5px; line-height: 1.75; color: var(--brc-mute); }
.brc-item-ctl { display: flex; align-items: center; gap: 9px; margin-top: 9px; flex-wrap: wrap; }
.brc-qty-wrap { position: relative; display: inline-flex; align-items: center; }
.brc-qty {
    width: 86px;
    padding: 7px 30px 7px 10px;
    border: 1px solid var(--brc-line);
    border-radius: 9px;
    background: var(--brc-card-2);
    color: var(--brc-ink);
    font-family: var(--brc-num);
    font-size: 14px;
    outline: none;
}
.brc-qty:focus { border-color: var(--brc-teal); box-shadow: var(--brc-ring); }
.brc-qty-wrap .brc-unit { right: 9px; font-size: 12px; }
.brc-item-price { font-size: 12px; color: var(--brc-mute); }
.brc-item-sum {
    text-align: right;
    min-width: 96px;
    padding-top: 2px;
}
.brc-item-sum b {
    display: block;
    font-family: var(--brc-num);
    font-size: 18px;
    font-weight: 800;
    color: var(--brc-ink);
    letter-spacing: -0.01em;
}
.brc-item-sum span { font-size: 11.5px; color: var(--brc-mute); }

/* 选配加购 */
.brc-extras { margin-top: 12px; }
.brc-extras-title {
    margin: 0 0 9px;
    font-size: 12.5px;
    font-weight: 800;
    color: var(--brc-sub);
    letter-spacing: 0.02em;
}
.brc-extra-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.brc-extra {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 13px;
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r-md);
    background: var(--brc-card-2);
    transition: border-color 0.16s ease, background 0.16s ease;
}
.brc-extra.is-on { border-color: var(--brc-teal-line); background: var(--brc-teal-l); }
.brc-extra-txt { min-width: 0; flex: 1; }
.brc-extra-txt b { display: block; font-size: 13.5px; font-weight: 700; }
.brc-extra-txt span { font-size: 11.5px; color: var(--brc-mute); }
.brc-extra-amt { font-family: var(--brc-num); font-size: 13px; color: var(--brc-sub); white-space: nowrap; }

/* ============================ 结果面板 ============================ */
.brc-result {
    padding: 20px;
    border-radius: var(--brc-r);
    color: #eef9f8;
    background:
        radial-gradient(110% 100% at 100% 0%, rgba(88, 210, 200, 0.24), rgba(88, 210, 200, 0) 60%),
        linear-gradient(150deg, #0b525c 0%, #0e7a86 100%);
    box-shadow: var(--brc-shadow-lg);
}
.brc-result .lb { font-size: 13px; color: rgba(226, 246, 245, 0.82); }
.brc-result .big {
    display: block;
    margin: 6px 0 2px;
    font-family: var(--brc-num);
    font-size: clamp(30px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.15;
    color: #fff;
    letter-spacing: -0.02em;
}
.brc-result .rng { font-size: 12.5px; color: rgba(226, 246, 245, 0.78); }
.brc-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 8px;
    margin-top: 16px;
}
.brc-metric {
    padding: 10px 9px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.14);
    text-align: center;
}
.brc-metric span { display: block; font-size: 11.5px; color: rgba(226, 246, 245, 0.78); }
.brc-metric b {
    display: block;
    margin-top: 3px;
    font-family: var(--brc-num);
    font-size: 16px;
    font-weight: 800;
    color: #ffd9a0;
}

/* 分档三选 */
.brc-tiers { display: grid; gap: 9px; margin-top: 16px; }
/* 浅色卡片上的三档选择：白底可读、选中态用圆点勾表示 */
.brc-tier {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 11px 13px;
    border-radius: 13px;
    border: 1.5px solid var(--brc-line);
    background: var(--brc-card);
    cursor: pointer;
    text-align: left;
    width: 100%;
    transition: background 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}
.brc-tier:hover { border-color: rgba(14, 122, 134, 0.45); background: rgba(14, 122, 134, 0.04); }
.brc-tier:focus-visible { outline: none; box-shadow: var(--brc-ring); }
.brc-tier.is-on {
    border-color: var(--brc-teal);
    background: rgba(14, 122, 134, 0.06);
    box-shadow: 0 2px 10px rgba(14, 122, 134, 0.12);
}
/* 左侧选中状态指示：空心圆 = 未选，实心圆 + 白勾 = 已选 */
.brc-tier-dot {
    flex: none;
    position: relative;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--brc-line-2);
    background: transparent;
    transition: background 0.16s ease, border-color 0.16s ease;
}
.brc-tier.is-on .brc-tier-dot { border-color: var(--brc-teal); background: var(--brc-teal); }
.brc-tier.is-on .brc-tier-dot::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 1.5px;
    width: 4.5px;
    height: 9px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}
.brc-tier-txt { flex: 1; min-width: 0; }
.brc-tier-txt b { display: block; font-size: 13.5px; font-weight: 800; color: var(--brc-ink); }
.brc-tier-txt span { font-size: 11.5px; color: var(--brc-mute); }
.brc-tier-amt {
    font-family: var(--brc-num);
    font-size: 16px;
    font-weight: 800;
    color: var(--brc-teal);
    white-space: nowrap;
}
.brc-tier-amt small { display: block; font-size: 10.5px; font-weight: 500; color: var(--brc-mute); }

/* 深色主题：三档按钮换回深色底 */
[data-theme="dark"] .brc-tier { border-color: rgba(255, 255, 255, 0.14); background: rgba(255, 255, 255, 0.05); }
[data-theme="dark"] .brc-tier:hover { border-color: rgba(88, 210, 200, 0.5); background: rgba(255, 255, 255, 0.1); }
[data-theme="dark"] .brc-tier.is-on {
    border-color: rgba(88, 210, 200, 0.65);
    background: rgba(88, 210, 200, 0.1);
    box-shadow: none;
}
[data-theme="dark"] .brc-tier.is-on .brc-tier-dot { border-color: var(--brc-teal); background: var(--brc-teal); }
[data-theme="dark"] .brc-tier-dot { border-color: rgba(255, 255, 255, 0.28); }
[data-theme="dark"] .brc-tier-txt b { color: #fff; }
[data-theme="dark"] .brc-tier-txt span { color: rgba(226, 246, 245, 0.76); }
[data-theme="dark"] .brc-tier-amt { color: var(--brc-teal); }
[data-theme="dark"] .brc-tier-amt small { color: rgba(226, 246, 245, 0.7); }

/* 分项占比条 */
.brc-bar-wrap { margin-top: 18px; }
.brc-bar {
    display: flex;
    height: 12px;
    border-radius: 999px;
    overflow: hidden;
    background: var(--brc-line-2);
}
.brc-bar i { display: block; height: 100%; transition: width 0.3s ease; }
.brc-bar-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    margin-top: 10px;
    font-size: 11.5px;
    color: var(--brc-mute);
}
.brc-bar-legend span { display: inline-flex; align-items: center; gap: 5px; }
.brc-bar-legend i { width: 8px; height: 8px; border-radius: 3px; }

/* 分项明细 */
.brc-list { margin-top: 16px; border-top: 1px solid var(--brc-line); }
.brc-list-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    align-items: baseline;
    padding: 11px 0;
    border-bottom: 1px solid var(--brc-line-2);
}
.brc-list-row:last-child { border-bottom: 0; }
.brc-list-name { display: flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 700; }
.brc-list-name i { width: 9px; height: 9px; border-radius: 3px; flex: none; }
.brc-list-name em { font-style: normal; font-weight: 500; font-size: 11.5px; color: var(--brc-mute); }
.brc-list-amt { font-family: var(--brc-num); font-size: 15px; font-weight: 700; white-space: nowrap; }
.brc-list-amt small { font-weight: 500; font-size: 11px; color: var(--brc-mute); margin-left: 4px; }
.brc-list-row.is-total { border-top: 1px dashed var(--brc-line); border-bottom: 0; padding-top: 13px; }
.brc-list-row.is-total .brc-list-name { font-size: 14.5px; }
.brc-list-row.is-total .brc-list-amt { font-size: 20px; font-weight: 800; color: var(--brc-clay); }
.brc-list-row.is-sub .brc-list-amt { color: var(--brc-sub); }

/* ============================ 批量测算 ============================ */
.brc-table-wrap { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.brc-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 660px; }
.brc-table th, .brc-table td { padding: 9px 8px; text-align: left; border-bottom: 1px solid var(--brc-line-2); }
.brc-table th { font-size: 12px; font-weight: 700; color: var(--brc-mute); white-space: nowrap; }
.brc-table tfoot th { border-bottom: 0; border-top: 1px solid var(--brc-line); color: var(--brc-sub); }
.brc-table input, .brc-table select {
    width: 100%;
    padding: 7px 9px;
    border: 1px solid var(--brc-line);
    border-radius: 8px;
    background: var(--brc-card-2);
    color: var(--brc-ink);
    font-family: inherit;
    font-size: 13px;
    outline: none;
}
.brc-table input:focus, .brc-table select:focus { border-color: var(--brc-teal); box-shadow: var(--brc-ring); }
.brc-table input[type="text"] { min-width: 110px; }
.brc-table input[type="number"] { width: 78px; font-family: var(--brc-num); }
.brc-table select { min-width: 92px; }
.brc-table .num { text-align: right; font-family: var(--brc-num); font-weight: 700; white-space: nowrap; }
.brc-table tr.is-bad input, .brc-table tr.is-bad select { border-color: var(--brc-err); }
.brc-table .brc-del {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    color: var(--brc-mute);
    background: var(--brc-card-2);
    border: 1px solid var(--brc-line);
    font-size: 13px;
    line-height: 1;
}
.brc-table .brc-del:hover { color: var(--brc-err); border-color: var(--brc-err); }
.brc-row-err { display: none; font-size: 11.5px; color: var(--brc-err); }
.brc-table tr.is-bad .brc-row-err { display: block; }

.brc-bar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 9px;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--brc-line-2);
}
.brc-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 15px;
    border-radius: 11px;
    border: 1px solid var(--brc-line);
    background: var(--brc-card-2);
    color: var(--brc-sub);
    font-size: 13.5px;
    font-weight: 700;
    transition: border-color 0.15s ease, color 0.15s ease, background 0.15s ease;
}
.brc-btn:hover { border-color: var(--brc-teal-line); color: var(--brc-teal); background: var(--brc-teal-l); }
.brc-btn:focus-visible { outline: none; box-shadow: var(--brc-ring); }
.brc-btn.is-primary {
    color: #fff;
    border-color: transparent;
    background: linear-gradient(135deg, var(--brc-teal-d), var(--brc-teal));
}
.brc-btn.is-primary:hover { color: #fff; filter: brightness(1.06); }
.brc-btn.is-clay { color: var(--brc-clay); border-color: var(--brc-clay-line); background: var(--brc-clay-l); }

/* ============================ 示例场景 ============================ */
.brc-scenes { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 11px; }
.brc-scene {
    padding: 14px 15px;
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r-md);
    background: var(--brc-card-2);
    text-align: left;
    transition: border-color 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}
.brc-scene:hover { border-color: var(--brc-teal-line); transform: translateY(-2px); box-shadow: var(--brc-shadow); }
.brc-scene:focus-visible { outline: none; box-shadow: var(--brc-ring); }
.brc-scene b { display: block; font-size: 14px; font-weight: 800; margin-bottom: 4px; }
.brc-scene span { display: block; font-size: 12px; line-height: 1.7; color: var(--brc-mute); }

/* ============================ 防水单项 ============================ */
.brc-wp-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; }
.brc-wp-out {
    padding: 16px 18px;
    border-radius: var(--brc-r-md);
    background: var(--brc-teal-l);
    border: 1px solid var(--brc-teal-line);
}
.brc-wp-out .lb { font-size: 12.5px; color: var(--brc-sub); }
.brc-wp-out .big {
    display: block;
    margin: 4px 0 8px;
    font-family: var(--brc-num);
    font-size: 28px;
    font-weight: 800;
    color: var(--brc-teal-d);
}
.brc-wp-out ul { margin: 0; padding-left: 18px; font-size: 12.5px; line-height: 1.85; color: var(--brc-sub); }
.brc-wp-out li b { color: var(--brc-ink); }

/* ============================ AI ============================ */
.brc-ai {
    padding: 22px 24px;
    border-radius: var(--brc-r);
    border: 1px solid var(--brc-clay-line);
    background: linear-gradient(140deg, var(--brc-clay-l), var(--brc-card) 62%);
}
.brc-ai h3 { margin: 0 0 8px; font-size: 16px; font-weight: 800; }
.brc-ai p { margin: 0 0 14px; font-size: 13.5px; line-height: 1.85; color: var(--brc-sub); }
.brc-ai p b { color: var(--brc-ink); }
.brc-ai-box {
    margin-top: 14px;
    padding: 16px 18px;
    border-radius: var(--brc-r-md);
    background: var(--brc-card);
    border: 1px solid var(--brc-line);
    font-size: 14px;
    line-height: 1.95;
    color: var(--brc-ink);
}
.brc-ai-box p { margin: 0 0 9px; color: var(--brc-ink); font-size: 14px; }
.brc-ai-box p:last-child { margin-bottom: 0; }
.brc-ai-box .ld { color: var(--brc-mute); }

/* ============================ 文本 / FAQ ============================ */
.brc-prose h3 { margin: 0 0 12px; font-size: 16px; font-weight: 800; }
.brc-prose ol, .brc-prose ul { margin: 0; padding-left: 20px; }
.brc-prose li { margin-bottom: 9px; font-size: 14px; line-height: 1.9; color: var(--brc-sub); }
.brc-prose li:last-child { margin-bottom: 0; }
.brc-prose b { color: var(--brc-ink); font-weight: 700; }
.brc-faq details {
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r-md);
    padding: 0 15px;
    margin-bottom: 9px;
    background: var(--brc-card-2);
}
.brc-faq summary {
    padding: 13px 0;
    font-size: 14.5px;
    font-weight: 700;
    cursor: pointer;
    list-style: none;
    color: var(--brc-ink);
}
.brc-faq summary::-webkit-details-marker { display: none; }
.brc-faq summary::after {
    content: "＋";
    float: right;
    color: var(--brc-teal);
    font-weight: 700;
}
.brc-faq details[open] summary::after { content: "－"; }
.brc-faq summary:focus-visible { outline: none; color: var(--brc-teal); }
.brc-faq .a { padding: 0 0 14px; font-size: 13.5px; line-height: 1.95; color: var(--brc-sub); }
.brc-faq .a b { color: var(--brc-ink); }

/* 相关工具 */
.brc-rel { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.brc-rel a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border: 1px solid var(--brc-line);
    border-radius: var(--brc-r-md);
    background: var(--brc-card-2);
    color: var(--brc-sub);
    font-size: 13.5px;
    font-weight: 600;
    transition: border-color 0.15s ease, color 0.15s ease;
}
.brc-rel a:hover { border-color: var(--brc-teal-line); color: var(--brc-teal); }
.brc-rel .ico { font-size: 17px; }

.brc-foot {
    margin: 22px 0 8px;
    padding: 15px 18px;
    border-radius: var(--brc-r-md);
    border: 1px dashed var(--brc-clay-line);
    background: var(--brc-clay-l);
    font-size: 12.5px;
    line-height: 1.9;
    color: var(--brc-warn);
}
.brc-foot b { color: var(--brc-warn); }

/* ============================ Toast ============================ */
.brc-toast {
    position: fixed;
    left: 50%;
    bottom: 34px;
    transform: translate(-50%, 14px);
    z-index: 99999;
    max-width: 88vw;
    padding: 11px 20px;
    border-radius: 12px;
    background: rgba(20, 42, 47, 0.95);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    line-height: 1.5;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.24);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease, transform 0.22s ease;
}
.brc-toast.show { opacity: 1; transform: translate(-50%, 0); }
.brc-toast.ok { background: rgba(17, 88, 66, 0.96); }
.brc-toast.err { background: rgba(150, 52, 38, 0.96); }

/* ============================ 打印区 ============================ */
.brc-printzone { display: none; }

@media print {
    .nav-header, .footer, .brc-toast { display: none !important; }
    /* 隐藏页面主体之外的一切（导航、页脚、悬浮小挂件），只留预算表 */
    body > *:not(.brc-page) { display: none !important; }
    /* 只保留 A4 预算表：隐藏容器内除打印区之外的所有内容 */
    .brc-page > .container > *:not(#brcPrintZone) { display: none !important; }
    body { background: #fff !important; }
    .brc-page { padding: 0; }
    .brc-printzone {
        display: block !important;
        padding: 0;
        color: #000;
        font-family: var(--brc-font);
    }
    .brc-pz-head { border-bottom: 2px solid #000; padding-bottom: 8px; margin-bottom: 12px; }
    .brc-pz-head h2 { margin: 0 0 4px; font-size: 19px; }
    .brc-pz-head .meta { font-size: 12px; color: #444; }
    .brc-pz-title { margin: 14px 0 6px; font-size: 14px; font-weight: 800; }
    .brc-pz-table { width: 100%; border-collapse: collapse; font-size: 12px; }
    .brc-pz-table th, .brc-pz-table td { border: 1px solid #999; padding: 5px 7px; text-align: left; }
    .brc-pz-table th { background: #f0f0f0; }
    .brc-pz-table .num { text-align: right; font-family: var(--brc-num); }
    .brc-pz-list { margin: 0; padding-left: 18px; font-size: 12px; line-height: 1.8; }
    .brc-pz-sign { display: flex; gap: 26px; margin-top: 22px; font-size: 12px; }
    .brc-pz-note { margin-top: 14px; font-size: 11px; color: #555; line-height: 1.7; }
}

/* ============================ 响应式 ============================ */
@media (max-width: 1080px) {
    .brc-hero { grid-template-columns: minmax(0, 1fr); padding: 28px 24px; }
    .brc-quick { max-width: 520px; }
    .brc-main { grid-template-columns: minmax(0, 1fr); }
    .brc-sticky { position: static; }
}
@media (max-width: 760px) {
    .brc-hero { padding: 24px 18px; border-radius: 20px; }
    .brc-lead { font-size: 14px; }
    .brc-fields { grid-template-columns: minmax(0, 1fr); }
    .brc-item { grid-template-columns: 38px minmax(0, 1fr); }
    .brc-item-ico { width: 38px; height: 38px; }
    .brc-item-sum { grid-column: 2; text-align: left; min-width: 0; }
    .brc-item-sum b { display: inline-block; margin-right: 6px; }
    .brc-extra-grid, .brc-scenes, .brc-rel, .brc-wp-grid { grid-template-columns: minmax(0, 1fr); }
    .brc-mini { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: none; }
    .brc-metrics { grid-template-columns: minmax(0, 1fr); }
    .brc-card-body { padding: 16px 15px 18px; }
}
@media (prefers-reduced-motion: reduce) {
    .brc-page *, .brc-page *::before, .brc-page *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }
}