/* ======================================================================
 *  bike-wheel-circumference.css —— 码表轮径标定（#7）
 *  主题：石墨黑 + 电光青（码表夜骑仪表盘质感）
 *  布局语言：半圆仪表盘 + 指针偏转 + 速度速查横表（区别于 #6 的尺码卡矩阵）
 * ====================================================================== */

/* ---------- 作用域 ---------- */
.bwc-page,
.bwc-modal,
.bwc-sheet,
.bwc-toast {
    --bwc-graphite: #16191D;
    --bwc-graphite-2: #22262C;
    --bwc-graphite-3: #2C3138;
    --bwc-cyan: #00E5C0;
    --bwc-cyan-dim: #0BBFA4;
    --bwc-cyan-soft: rgba(0, 229, 192, .14);
    --bwc-amber: #FFB020;
    --bwc-amber-soft: rgba(255, 176, 32, .14);
    --bwc-paper: #F2F4F5;
    --bwc-card: #FFFFFF;
    --bwc-card-2: #F6F8F8;
    --bwc-line: #DDE3E5;
    --bwc-line-2: #EDF1F2;
    --bwc-ink: #12161A;
    --bwc-ink-2: #47535A;
    --bwc-ink-3: #7C8A92;
    --bwc-ok: #0C8A5F;
    --bwc-ok-soft: #E3F5EE;
    --bwc-warn: #A86800;
    --bwc-warn-soft: #FFF2DC;
    --bwc-danger: #C0392B;
    --bwc-danger-soft: #FBEBE9;
    --bwc-r-sm: 9px;
    --bwc-r-md: 14px;
    --bwc-r-lg: 20px;
    --bwc-sh-1: 0 1px 2px rgba(18, 22, 26, .06);
    --bwc-sh-2: 0 10px 26px rgba(18, 22, 26, .09);
    --bwc-sh-3: 0 22px 52px rgba(18, 22, 26, .16);
    --bwc-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

:root[data-theme="dark"] .bwc-page,
:root[data-theme="dark"] .bwc-modal,
:root[data-theme="dark"] .bwc-sheet,
:root[data-theme="dark"] .bwc-toast {
    --bwc-graphite: #0C0E10;
    --bwc-graphite-2: #16191D;
    --bwc-graphite-3: #22262C;
    --bwc-cyan: #34F0D0;
    --bwc-cyan-dim: #17C9AC;
    --bwc-cyan-soft: rgba(52, 240, 208, .13);
    --bwc-amber: #FFC455;
    --bwc-amber-soft: rgba(255, 196, 85, .14);
    --bwc-paper: #0A0C0E;
    --bwc-card: #14181B;
    --bwc-card-2: #1A1F23;
    --bwc-line: #262C32;
    --bwc-line-2: #1E2429;
    --bwc-ink: #E9EFF1;
    --bwc-ink-2: #A4B1B8;
    --bwc-ink-3: #77858D;
    --bwc-ok: #3FD3A3;
    --bwc-ok-soft: rgba(63, 211, 163, .14);
    --bwc-warn: #FFC455;
    --bwc-warn-soft: rgba(255, 196, 85, .14);
    --bwc-danger: #F08A80;
    --bwc-danger-soft: rgba(240, 138, 128, .14);
    --bwc-sh-1: 0 1px 2px rgba(0, 0, 0, .4);
    --bwc-sh-2: 0 10px 26px rgba(0, 0, 0, .46);
    --bwc-sh-3: 0 22px 52px rgba(0, 0, 0, .56);
}

.bwc-page {
    color: var(--bwc-ink);
    font-size: 15.5px;
    line-height: 1.8;
}
.bwc-page * { box-sizing: border-box; }

/* ================= 首屏 ================= */
.bwc-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 30px;
    align-items: center;
    background:
        radial-gradient(620px 320px at 92% 0%, rgba(0, 229, 192, .14), transparent 60%),
        linear-gradient(150deg, var(--bwc-graphite) 0%, var(--bwc-graphite-2) 100%);
    border-radius: var(--bwc-r-lg);
    padding: 32px 36px;
    margin-bottom: 22px;
    box-shadow: var(--bwc-sh-3);
    position: relative;
    overflow: hidden;
}
.bwc-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
    background-size: 34px 34px;
    pointer-events: none;
}
.bwc-hero-copy { position: relative; z-index: 1; min-width: 0; }
.bwc-kicker {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 5px 13px;
    border-radius: 999px;
    background: rgba(0, 229, 192, .14);
    border: 1px solid rgba(0, 229, 192, .3);
    color: var(--bwc-cyan);
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: .02em;
    margin-bottom: 13px;
}
.bwc-hero h1 {
    font-size: clamp(25px, 3.2vw, 34px);
    font-weight: 800;
    line-height: 1.26;
    letter-spacing: -.02em;
    color: #FFFFFF;
    margin: 0 0 11px;
}
.bwc-hero-sub {
    font-size: 15px;
    line-height: 1.85;
    color: #B9C6CC;
    margin: 0 0 16px;
    max-width: 56ch;
}
.bwc-hero-sub b { color: var(--bwc-cyan); font-weight: 700; }
.bwc-chips { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.bwc-chips li {
    padding: 5px 12px;
    border-radius: 6px;
    background: rgba(255, 255, 255, .07);
    border: 1px solid rgba(255, 255, 255, .12);
    color: #CBD7DC;
    font-size: 12.5px;
    font-weight: 600;
}

/* 仪表盘 */
.bwc-dial-wrap {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}
.bwc-dial {
    width: 100%;
    max-width: 330px;
    height: auto;
    filter: drop-shadow(0 14px 30px rgba(0, 0, 0, .38));
}
.bwc-dial-track { fill: none; stroke: rgba(255, 255, 255, .1); stroke-width: 15; stroke-linecap: round; }
.bwc-dial-fill {
    fill: none;
    stroke: var(--bwc-cyan);
    stroke-width: 15;
    stroke-linecap: round;
    filter: drop-shadow(0 0 7px rgba(0, 229, 192, .55));
    transition: stroke-dashoffset .6s cubic-bezier(.22, .9, .3, 1);
}
.bwc-dial-tick { stroke: rgba(255, 255, 255, .26); stroke-width: 1.6; }
.bwc-dial-tick--major { stroke: rgba(255, 255, 255, .5); stroke-width: 2.4; }
.bwc-dial-num { fill: #8FA3AC; font-size: 10px; font-family: var(--bwc-mono); }
.bwc-dial-needle {
    stroke: #FFB020;
    stroke-width: 4;
    stroke-linecap: round;
    transform-origin: 170px 170px;
    transition: transform .6s cubic-bezier(.22, .9, .3, 1);
    filter: drop-shadow(0 0 6px rgba(255, 176, 32, .85));
}
:root[data-theme="dark"] .bwc-dial-needle { stroke: #FFC455; }
.bwc-dial-hub { fill: var(--bwc-graphite-3); stroke: rgba(255, 255, 255, .18); stroke-width: 1.5; }
.bwc-dial-readout { text-align: center; line-height: 1.16; }
.bwc-dial-readout b {
    display: block;
    font-size: 34px;
    font-weight: 800;
    color: #FFFFFF;
    letter-spacing: -.02em;
}
.bwc-dial-readout span { font-size: 12px; color: #8FA3AC; font-weight: 600; }
.bwc-dial-caption { font-size: 12.5px; color: #97A8B0; text-align: center; max-width: 32ch; }
.bwc-dial-caption b { color: var(--bwc-cyan); }

/* ================= 首屏操作条 ================= */
.bwc-quick {
    background: var(--bwc-card);
    border: 1px solid var(--bwc-line);
    border-radius: var(--bwc-r-md);
    box-shadow: var(--bwc-sh-2);
    padding: 17px 21px 15px;
    margin: -10px 0 22px;
    position: relative;
    z-index: 3;
}
.bwc-quick-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr) auto;
    gap: 16px;
    align-items: end;
}
.bwc-field { min-width: 0; }
.bwc-field > label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    color: var(--bwc-ink-2);
    margin-bottom: 6px;
}
.bwc-field input[type="text"],
.bwc-field input[type="number"],
.bwc-field select {
    width: 100%;
    padding: 10px 12px;
    font-size: 15px;
    font-family: inherit;
    color: var(--bwc-ink);
    background: var(--bwc-card-2);
    border: 1px solid var(--bwc-line);
    border-radius: var(--bwc-r-sm);
    outline: none;
    transition: border-color .16s, box-shadow .16s, background-color .16s;
}
.bwc-field input:focus, .bwc-field select:focus {
    border-color: var(--bwc-cyan-dim);
    background: var(--bwc-card);
    box-shadow: 0 0 0 3px var(--bwc-cyan-soft);
}
.bwc-field input.is-bad { border-color: var(--bwc-danger); box-shadow: 0 0 0 3px var(--bwc-danger-soft); }
.bwc-hint { font-size: 12px; line-height: 1.6; color: var(--bwc-ink-3); margin: 5px 0 0; }
.bwc-hint b { color: var(--bwc-ink-2); }
.bwc-err { font-size: 12.5px; color: var(--bwc-danger); margin: 9px 0 0; font-weight: 600; }
.bwc-err:empty { display: none; }
.bwc-quick-mini { display: flex; gap: 14px; justify-content: center; margin-top: 7px; }
.bwc-linkbtn {
    background: none; border: none; padding: 0;
    font-family: inherit; font-size: 12.5px; font-weight: 650;
    color: var(--bwc-ink-3); cursor: pointer;
    border-bottom: 1px dashed var(--bwc-line);
    transition: color .16s, border-color .16s;
}
.bwc-linkbtn:hover { color: var(--bwc-cyan-dim); border-color: var(--bwc-cyan-dim); }

/* ================= 按钮 ================= */
.bwc-actions { display: flex; flex-wrap: wrap; gap: 9px; }
.bwc-btn {
    padding: 10px 18px;
    border-radius: var(--bwc-r-sm);
    border: 1px solid var(--bwc-line);
    background: var(--bwc-card);
    color: var(--bwc-ink-2);
    font-size: 14px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all .16s;
}
.bwc-btn:hover { border-color: var(--bwc-cyan-dim); color: var(--bwc-cyan-dim); transform: translateY(-1px); }
.bwc-btn--primary {
    background: linear-gradient(135deg, var(--bwc-cyan), var(--bwc-cyan-dim));
    border-color: transparent;
    color: #06231E;
    box-shadow: 0 8px 20px rgba(0, 229, 192, .26);
    font-weight: 800;
}
.bwc-btn--primary:hover { color: #06231E; filter: brightness(1.05); }
.bwc-btn--lg { padding: 12px 28px; font-size: 15px; }

/* ================= 主区 ================= */
.bwc-main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 400px);
    gap: 20px;
    align-items: start;
}
.bwc-panel {
    background: var(--bwc-card);
    border: 1px solid var(--bwc-line);
    border-radius: var(--bwc-r-md);
    box-shadow: var(--bwc-sh-1);
    padding: 19px 21px 21px;
    margin-bottom: 18px;
}
.bwc-panel-head { display: flex; align-items: center; gap: 10px; margin-bottom: 15px; }
.bwc-step {
    flex-shrink: 0;
    display: grid; place-items: center;
    width: 27px; height: 27px;
    border-radius: 7px;
    background: var(--bwc-graphite);
    color: var(--bwc-cyan);
    font-size: 12px;
    font-weight: 800;
    font-family: var(--bwc-mono);
}
.bwc-panel-head h2 {
    font-size: 17px; font-weight: 750; color: var(--bwc-ink);
    margin: 0; letter-spacing: -.01em;
}

/* 结果指标块 */
.bwc-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 10px;
    margin-bottom: 16px;
}
.bwc-metric {
    padding: 13px 14px;
    border-radius: var(--bwc-r-sm);
    background: var(--bwc-card-2);
    border: 1px solid var(--bwc-line-2);
}
.bwc-metric .mt {
    font-size: 12px; color: var(--bwc-ink-3); font-weight: 650;
    display: block; margin-bottom: 3px;
}
.bwc-metric .mv {
    font-size: 22px; font-weight: 800; color: var(--bwc-ink);
    letter-spacing: -.01em; line-height: 1.2;
}
.bwc-metric .mv small { font-size: 12.5px; font-weight: 650; color: var(--bwc-ink-3); margin-left: 3px; }
.bwc-metric.is-key { background: var(--bwc-cyan-soft); border-color: color-mix(in srgb, var(--bwc-cyan) 34%, transparent); }
.bwc-metric.is-key .mv { color: var(--bwc-cyan-dim); }
:root[data-theme="dark"] .bwc-metric.is-key .mv { color: var(--bwc-cyan); }

/* 明细行 */
.bwc-rows { display: flex; flex-direction: column; }
.bwc-row {
    display: flex; justify-content: space-between; align-items: baseline; gap: 16px;
    padding: 10px 2px;
    border-bottom: 1px dashed var(--bwc-line);
    font-size: 14px;
}
.bwc-row:last-child { border-bottom: none; }
.bwc-row .rk { color: var(--bwc-ink-2); flex-shrink: 0; }
.bwc-row .rv { color: var(--bwc-ink); font-weight: 700; text-align: right; word-break: break-all; }
.bwc-row .rv em { font-style: normal; color: var(--bwc-ink-3); font-weight: 500; font-size: 12.5px; }

/* 提示条 */
.bwc-note {
    display: flex; gap: 11px;
    padding: 13px 15px;
    border-radius: var(--bwc-r-sm);
    font-size: 13.5px; line-height: 1.75;
    margin-bottom: 11px;
    border: 1px solid transparent;
}
.bwc-note:last-child { margin-bottom: 0; }
.bwc-note .ico { flex-shrink: 0; font-size: 16px; line-height: 1.5; }
.bwc-note--ok { background: var(--bwc-ok-soft); border-color: color-mix(in srgb, var(--bwc-ok) 26%, transparent); color: var(--bwc-ink-2); }
.bwc-note--ok b { color: var(--bwc-ok); }
.bwc-note--warn { background: var(--bwc-warn-soft); border-color: color-mix(in srgb, var(--bwc-warn) 26%, transparent); color: var(--bwc-ink-2); }
.bwc-note--warn b { color: var(--bwc-warn); }
.bwc-note--danger { background: var(--bwc-danger-soft); border-color: color-mix(in srgb, var(--bwc-danger) 26%, transparent); color: var(--bwc-ink-2); }
.bwc-note--danger b { color: var(--bwc-danger); }

/* 速度速查表 */
.bwc-quicktable { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.bwc-quicktable th, .bwc-quicktable td {
    padding: 9px 10px; text-align: left;
    border-bottom: 1px solid var(--bwc-line-2);
}
.bwc-quicktable th {
    font-size: 12px; font-weight: 700; color: var(--bwc-ink-3);
    background: var(--bwc-card-2); white-space: nowrap;
}
.bwc-quicktable td { color: var(--bwc-ink-2); }
.bwc-quicktable td:first-child { font-weight: 700; color: var(--bwc-ink); white-space: nowrap; }
.bwc-quicktable tr.is-hit td { background: var(--bwc-cyan-soft); color: var(--bwc-ink); }
.bwc-table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

/* 批量 */
.bwc-batch textarea {
    width: 100%; min-height: 112px;
    padding: 12px 13px;
    font-size: 14px; font-family: var(--bwc-mono); line-height: 1.72;
    color: var(--bwc-ink);
    background: var(--bwc-card-2);
    border: 1px solid var(--bwc-line);
    border-radius: var(--bwc-r-sm);
    outline: none; resize: vertical;
}
.bwc-batch textarea:focus { border-color: var(--bwc-cyan-dim); box-shadow: 0 0 0 3px var(--bwc-cyan-soft); }
.bwc-batch-out {
    margin-top: 12px; max-height: 320px; overflow: auto;
    border: 1px solid var(--bwc-line); border-radius: var(--bwc-r-sm);
}
.bwc-batch-out table { width: 100%; border-collapse: collapse; font-size: 13px; }
.bwc-batch-out th, .bwc-batch-out td { padding: 7px 10px; border-bottom: 1px solid var(--bwc-line-2); text-align: left; }
.bwc-batch-out th { background: var(--bwc-card-2); color: var(--bwc-ink-3); font-size: 12px; font-weight: 700; position: sticky; top: 0; }
.bwc-batch-out td { color: var(--bwc-ink-2); }
.bwc-batch-out td:first-child { font-weight: 700; color: var(--bwc-ink); }

/* 全文 */
.bwc-doc {
    font-family: var(--bwc-mono); font-size: 13px; line-height: 1.85;
    white-space: pre-wrap; word-break: break-word;
    color: var(--bwc-ink-2);
    background: var(--bwc-card-2);
    border: 1px solid var(--bwc-line);
    border-radius: var(--bwc-r-sm);
    padding: 15px 16px;
    max-height: 440px; overflow: auto;
}
.bwc-doc:empty::before { content: "选择轮径后点击「开始标定」"; color: var(--bwc-ink-3); }

/* 风险卡 */
.bwc-risk { margin-top: 28px; }
.bwc-risk > h2 { font-size: 20px; font-weight: 800; margin: 0 0 15px; letter-spacing: -.01em; }
.bwc-risk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 13px; }
.bwc-risk-card {
    padding: 17px 18px;
    border: 1px solid var(--bwc-line);
    border-left: 3px solid var(--bwc-cyan-dim);
    border-radius: var(--bwc-r-sm);
    background: var(--bwc-card);
    box-shadow: var(--bwc-sh-1);
}
.bwc-risk-card h3 { font-size: 15px; font-weight: 750; margin: 0 0 6px; color: var(--bwc-ink); }
.bwc-risk-card p { font-size: 13.5px; line-height: 1.78; color: var(--bwc-ink-2); margin: 0; }
.bwc-risk-card b { color: var(--bwc-ink); }

/* toast */
.bwc-toast {
    position: fixed; left: 50%; bottom: 26px;
    transform: translateX(-50%) translateY(10px);
    background: var(--bwc-graphite);
    color: #fff;
    font-size: 14px; font-weight: 600;
    padding: 11px 22px; border-radius: 999px;
    z-index: 9999; opacity: 0; pointer-events: none;
    transition: opacity .2s, transform .2s;
    box-shadow: var(--bwc-sh-3);
}
.bwc-toast.is-on { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ================= 响应式 ================= */
@media (max-width: 980px) {
    .bwc-hero { grid-template-columns: 1fr; padding: 26px 22px; }
    .bwc-main { grid-template-columns: 1fr; }
    .bwc-quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .bwc-quick-grid .bwc-field--act { grid-column: 1 / -1; }
}
@media (max-width: 600px) {
    .bwc-hero { padding: 20px 16px; }
    .bwc-hero h1 { font-size: 22px; }
    .bwc-quick-grid { grid-template-columns: 1fr; }
    .bwc-dial { max-width: 280px; }
}

/* ================= AI 解读 ================= */
.bwc-ai {
    border: 1px solid var(--bwc-line);
    border-radius: var(--bwc-r-md);
    background: var(--bwc-card);
    padding: 18px 20px 20px;
    box-shadow: var(--bwc-sh-1);
    margin-bottom: 18px;
}
.bwc-ai-head { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 12px; }
.bwc-ai-head h2 { font-size: 16px; font-weight: 750; margin: 0; color: var(--bwc-ink); }
.bwc-ai-head .ai-tag {
    font-size: 11.5px;
    font-weight: 700;
    padding: 3px 9px;
    border-radius: 4px;
    background: var(--bwc-cyan-soft);
    color: var(--bwc-cyan-dim);
    border: 1px solid color-mix(in srgb, var(--bwc-cyan) 30%, transparent);
}
:root[data-theme="dark"] .bwc-ai-head .ai-tag { color: var(--bwc-cyan); }
.bwc-ai-btn {
    padding: 9px 18px;
    border-radius: var(--bwc-r-sm);
    border: 1px solid var(--bwc-cyan-dim);
    background: var(--bwc-cyan-soft);
    color: var(--bwc-cyan-dim);
    font-size: 13.5px;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all .16s;
}
.bwc-ai-btn:hover { background: var(--bwc-cyan); color: #06231E; }
.bwc-ai-btn:disabled { opacity: .55; cursor: not-allowed; }
:root[data-theme="dark"] .bwc-ai-btn:hover { color: #06231E; }
.bwc-ai-status { font-size: 12.5px; color: var(--bwc-ink-3); }
.bwc-ai-box {
    margin-top: 12px;
    font-size: 14px;
    line-height: 1.82;
    color: var(--bwc-ink-2);
    background: var(--bwc-card-2);
    border: 1px solid var(--bwc-line);
    border-radius: var(--bwc-r-sm);
    padding: 14px 16px;
}
.bwc-ai-box:empty { display: none; }
.bwc-ai-box p { margin: 0 0 8px; }
.bwc-ai-box p:last-child { margin-bottom: 0; }
.bwc-ai-note { font-size: 12px; color: var(--bwc-ink-3); margin: 10px 0 0; }

/* ================= 打印 ================= */
@media print {
    .bwc-actions, .bwc-batch, .bwc-toast, .bwc-quick, .bwc-ai { display: none !important; }
    .bwc-hero { background: none; box-shadow: none; border: 1px solid #999; }
    .bwc-hero h1, .bwc-hero-sub, .bwc-kicker, .bwc-chips li { color: #000 !important; }
    .bwc-panel, .bwc-risk-card { box-shadow: none; break-inside: avoid; }
}