/* ==========================================================================
   奶粉价格与每百元营养成本对比计算器 /tool/formula-price-compare-calc
   视觉主题：冲调操作台 —— 奶罐青蓝 + 奶油白 + 蜜桃粉 + 等宽数字
   深浅双主题；深色跟随导航 #themeToggle，页面内不另设开关
   ========================================================================== */

.fpc-page {
    /* ---- 浅色（默认） ---- */
    --fpc-bg: #eef5f4;
    --fpc-bg-2: #e3eeec;
    --fpc-card: #ffffff;
    --fpc-card-2: #f4f9f8;
    --fpc-ink: #233a41;
    --fpc-ink-2: #567077;
    --fpc-ink-3: #8ba0a6;
    --fpc-line: #d5e3e0;
    --fpc-line-2: #e3eeec;
    --fpc-teal: #17798b;
    --fpc-teal-2: #1e96ab;
    --fpc-teal-soft: #ddf0f2;
    --fpc-peach: #d9603f;
    --fpc-peach-2: #e87f60;
    --fpc-peach-soft: #fbe8e0;
    --fpc-green: #2f8f5b;
    --fpc-green-soft: #e2f2e8;
    --fpc-gold: #a8781f;
    --fpc-gold-soft: #f7efdc;
    --fpc-shadow: 0 18px 40px rgba(23, 121, 139, .13);
    --fpc-shadow-sm: 0 5px 16px rgba(23, 121, 139, .09);
    --fpc-radius: 16px;
    --fpc-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

:root[data-theme="dark"] .fpc-page {
    --fpc-bg: #0d1b1e;
    --fpc-bg-2: #102225;
    --fpc-card: #152a2e;
    --fpc-card-2: #1a3438;
    --fpc-ink: #e4efed;
    --fpc-ink-2: #a8bfc3;
    --fpc-ink-3: #7b939a;
    --fpc-line: #27464c;
    --fpc-line-2: #204046;
    --fpc-teal: #5cc4d4;
    --fpc-teal-2: #7fd6e2;
    --fpc-teal-soft: #14343a;
    --fpc-peach: #f09578;
    --fpc-peach-2: #f5ab90;
    --fpc-peach-soft: #38211a;
    --fpc-green: #7cc79c;
    --fpc-green-soft: #16301f;
    --fpc-gold: #d8b25e;
    --fpc-gold-soft: #332916;
    --fpc-shadow: 0 18px 44px rgba(0, 0, 0, .5);
    --fpc-shadow-sm: 0 5px 16px rgba(0, 0, 0, .38);
}

.fpc-page {
    color: var(--fpc-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.75;
    font-variant-numeric: tabular-nums;
    padding: 26px 26px 30px;
    margin-top: 22px;
    background:
        radial-gradient(circle at 18px 18px, rgba(23, 121, 139, .055) 2.4px, transparent 3px),
        linear-gradient(180deg, var(--fpc-bg-2), var(--fpc-bg));
    background-size: 44px 44px, 100% 100%;
    border: 1px solid var(--fpc-line);
    border-radius: var(--fpc-radius);
    box-shadow: var(--fpc-shadow);
}

.fpc-page * { box-sizing: border-box; }

.fpc-page h1,
.fpc-page h2,
.fpc-page h3 { margin: 0; line-height: 1.4; }
.fpc-page h1 { font-size: 29px; font-weight: 800; color: var(--fpc-teal); letter-spacing: .2px; }
.fpc-page h2 { font-size: 20px; font-weight: 800; color: var(--fpc-ink); }
.fpc-page h3 { font-size: 15px; font-weight: 700; color: var(--fpc-ink); }

/* ===================== 首屏 ===================== */
.fpc-hero { margin-bottom: 20px; }

.fpc-kicker {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--fpc-peach);
    background: var(--fpc-peach-soft);
    border: 1px solid var(--fpc-line);
    border-radius: 999px;
    padding: 4px 14px;
    margin-bottom: 12px;
}
.fpc-kicker::before {
    content: "";
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--fpc-peach-2);
}

.fpc-lead {
    margin: 10px 0 14px;
    font-size: 15px;
    color: var(--fpc-ink-2);
    max-width: 64ch;
    line-height: 1.85;
}
.fpc-lead b { color: var(--fpc-teal); font-weight: 700; }

.fpc-tags { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.fpc-tags li {
    font-size: 12px;
    color: var(--fpc-ink-2);
    background: var(--fpc-card);
    border: 1px solid var(--fpc-line);
    border-radius: 999px;
    padding: 3px 12px;
}

/* ===================== 速览卡 ===================== */
.fpc-overview {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 18px;
}
.fpc-ov-card {
    background: var(--fpc-card);
    border: 1px solid var(--fpc-line);
    border-radius: 12px;
    padding: 14px 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    position: relative;
    overflow: hidden;
    box-shadow: var(--fpc-shadow-sm);
}
.fpc-ov-card::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--fpc-line);
}
.fpc-ov-card.is-main::before { background: var(--fpc-teal); }
.fpc-ov-card.is-save::before { background: var(--fpc-green); }
.fpc-ov-card.is-warn::before { background: var(--fpc-peach); }
.fpc-ov-label { font-size: 12px; color: var(--fpc-ink-3); }
.fpc-ov-val { font-family: var(--fpc-mono); font-size: 25px; font-weight: 700; color: var(--fpc-ink); line-height: 1.3; }
.fpc-ov-card.is-main .fpc-ov-val { color: var(--fpc-teal); }
.fpc-ov-card.is-save .fpc-ov-val { color: var(--fpc-green); }
.fpc-ov-card.is-warn .fpc-ov-val { color: var(--fpc-peach); }
.fpc-ov-unit { font-size: 11px; color: var(--fpc-ink-3); }

/* ===================== 预置示例 ===================== */
.fpc-presets { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.fpc-presets-label { font-size: 12px; font-weight: 700; letter-spacing: 1px; color: var(--fpc-ink-3); }
.fpc-presets button {
    font: inherit;
    font-size: 13px;
    color: var(--fpc-teal);
    background: var(--fpc-card);
    border: 1px solid var(--fpc-line);
    border-radius: 999px;
    padding: 5px 14px;
    cursor: pointer;
    transition: all .15s ease;
}
.fpc-presets button:hover { border-color: var(--fpc-teal); background: var(--fpc-teal-soft); }

/* ===================== 校验条 ===================== */
.fpc-errbar {
    border-radius: 10px;
    border: 1px solid var(--fpc-peach);
    background: var(--fpc-peach-soft);
    color: var(--fpc-peach);
    font-size: 13px;
    line-height: 1.7;
    padding: 10px 14px;
    margin-bottom: 16px;
}
.fpc-errbar.is-warn { border-color: var(--fpc-gold); background: var(--fpc-gold-soft); color: var(--fpc-gold); }
.fpc-errbar ul { margin: 0; padding-left: 18px; }

/* ===================== 面板 ===================== */
.fpc-panel {
    background: var(--fpc-card);
    border: 1px solid var(--fpc-line);
    border-radius: 14px;
    padding: 22px 24px;
    margin-bottom: 18px;
    box-shadow: var(--fpc-shadow-sm);
}
.fpc-panel-head { margin-bottom: 16px; }
.fpc-pk {
    display: inline-block;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 3px;
    color: var(--fpc-card);
    background: var(--fpc-teal);
    border-radius: 999px;
    padding: 2px 12px;
    margin-bottom: 8px;
}
.fpc-panel-head h2 { margin-bottom: 4px; }
.fpc-panel-head p { margin: 0; font-size: 13px; color: var(--fpc-ink-2); }

/* ===================== 表单 ===================== */
.fpc-grid { display: grid; gap: 12px; }
.fpc-grid--4 { grid-template-columns: repeat(4, 1fr); }
.fpc-grid--5 { grid-template-columns: repeat(5, 1fr); }
.fpc-field { display: flex; flex-direction: column; gap: 5px; }
.fpc-label { font-size: 13px; font-weight: 600; color: var(--fpc-ink-2); }
.fpc-unit { font-size: 11px; font-weight: 400; color: var(--fpc-ink-3); }
.fpc-input {
    font: inherit;
    font-size: 14px;
    color: var(--fpc-ink);
    background: var(--fpc-card-2);
    border: 1px solid var(--fpc-line);
    border-radius: 9px;
    padding: 8px 12px;
    width: 100%;
    outline: none;
    transition: border-color .15s ease;
}
.fpc-input:focus { border-color: var(--fpc-teal); }
.fpc-mono { font-family: var(--fpc-mono); }
.fpc-select {
    font: inherit;
    font-size: 14px;
    color: var(--fpc-ink);
    background: var(--fpc-card-2);
    border: 1px solid var(--fpc-line);
    border-radius: 9px;
    padding: 8px 12px;
    width: 100%;
    outline: none;
}

/* ===================== 品牌对比台账 ===================== */
.fpc-table-wrap { overflow-x: auto; border: 1px solid var(--fpc-line); border-radius: 12px; }
.fpc-table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 1080px; }
.fpc-table th, .fpc-table td { padding: 8px 10px; text-align: left; border-bottom: 1px solid var(--fpc-line-2); white-space: nowrap; }
.fpc-table th {
    font-size: 12px;
    color: var(--fpc-ink-2);
    background: var(--fpc-teal-soft);
    font-weight: 700;
}
.fpc-table td { color: var(--fpc-ink); }
.fpc-table .fpc-mono { font-family: var(--fpc-mono); }
.fpc-table tbody tr:hover { background: var(--fpc-card-2); }
.fpc-table tbody tr:last-child td { border-bottom: none; }
.fpc-table tbody tr.is-current { background: var(--fpc-teal-soft); }
.fpc-table tbody tr.is-best td.is-hero { color: var(--fpc-green); font-weight: 700; }
.fpc-op { white-space: nowrap; }

.fpc-table .fpc-input, .fpc-table .fpc-select {
    font-size: 13px;
    padding: 5px 8px;
    border-radius: 7px;
    background: var(--fpc-card);
}
.fpc-table .cell-name { min-width: 130px; }
.fpc-table .cell-num { width: 84px; }
.fpc-table td.is-calc { font-family: var(--fpc-mono); color: var(--fpc-ink-2); }
.fpc-table td.is-hero { font-family: var(--fpc-mono); font-weight: 700; color: var(--fpc-teal); }

/* 在用单选 */
.fpc-use {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    font-size: 12px;
    color: var(--fpc-ink-2);
    user-select: none;
}
.fpc-use input { accent-color: var(--fpc-teal); cursor: pointer; margin: 0; }
.fpc-use input:checked + span { color: var(--fpc-teal); font-weight: 700; }

.fpc-del {
    width: 22px;
    height: 22px;
    border-radius: 6px;
    border: none;
    background: var(--fpc-peach-soft);
    color: var(--fpc-peach);
    font-size: 12px;
    font-weight: 800;
    cursor: pointer;
}
.fpc-del:hover { background: var(--fpc-peach); color: #fff; }
.fpc-table .empty-row td { text-align: center; color: var(--fpc-ink-3); padding: 18px 0; }

.fpc-item-bar { display: flex; align-items: center; gap: 14px; margin-top: 12px; flex-wrap: wrap; }
.fpc-mini-btn {
    font: inherit;
    font-size: 12px;
    font-weight: 700;
    color: var(--fpc-teal);
    background: var(--fpc-teal-soft);
    border: 1px dashed var(--fpc-teal);
    border-radius: 999px;
    padding: 4px 13px;
    cursor: pointer;
    transition: all .15s ease;
}
.fpc-mini-btn:hover { background: var(--fpc-teal); color: var(--fpc-card); }
.fpc-item-sum { font-size: 13px; color: var(--fpc-ink-2); }
.fpc-item-sum b { font-family: var(--fpc-mono); color: var(--fpc-teal); }

/* ===================== 结论卡 ===================== */
.fpc-facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 12px; }
.fpc-fact {
    background: var(--fpc-card-2);
    border: 1px solid var(--fpc-line-2);
    border-radius: 12px;
    padding: 12px 14px;
    font-size: 13px;
    line-height: 1.8;
    color: var(--fpc-ink-2);
}
.fpc-fact b { color: var(--fpc-teal); font-family: var(--fpc-mono); }
.fpc-fact.is-tip { border-left: 3px solid var(--fpc-peach); }
.fpc-fact.is-save { border-left: 3px solid var(--fpc-green); }
.fpc-fact.is-save b { color: var(--fpc-green); }
.fpc-fact.is-gold { border-left: 3px solid var(--fpc-gold); }
.fpc-fact.is-gold b { color: var(--fpc-gold); }

/* ===================== 按钮 ===================== */
.fpc-btn {
    font: inherit;
    font-size: 14px;
    font-weight: 700;
    color: var(--fpc-ink);
    background: var(--fpc-card);
    border: 1px solid var(--fpc-line);
    border-radius: 10px;
    padding: 9px 18px;
    cursor: pointer;
    transition: all .15s ease;
}
.fpc-btn:hover { border-color: var(--fpc-teal); color: var(--fpc-teal); }
.fpc-btn--primary { background: var(--fpc-teal); border-color: var(--fpc-teal); color: #fff; }
.fpc-btn--primary:hover { background: var(--fpc-teal-2); border-color: var(--fpc-teal-2); color: #fff; }
.fpc-btn--ghost { background: transparent; }
.fpc-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }

/* ===================== CSV 预览 ===================== */
.fpc-pre {
    margin: 0;
    background: var(--fpc-card-2);
    border: 1px solid var(--fpc-line-2);
    border-radius: 12px;
    padding: 14px 16px;
    font-family: var(--fpc-mono);
    font-size: 12.5px;
    line-height: 1.8;
    color: var(--fpc-ink-2);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 380px;
    overflow: auto;
}

/* ===================== FAQ ===================== */
.fpc-faq { display: flex; flex-direction: column; gap: 10px; }
.fpc-faq-item {
    background: var(--fpc-card-2);
    border: 1px solid var(--fpc-line-2);
    border-radius: 12px;
    overflow: hidden;
}
.fpc-faq-item summary {
    cursor: pointer;
    font-size: 14px;
    font-weight: 700;
    color: var(--fpc-ink);
    padding: 12px 16px;
    list-style: none;
    position: relative;
    padding-right: 40px;
}
.fpc-faq-item summary::-webkit-details-marker { display: none; }
.fpc-faq-item summary::after {
    content: "+";
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--fpc-teal);
    font-size: 18px;
    font-weight: 800;
}
.fpc-faq-item[open] summary::after { content: "−"; }
.fpc-faq-a { padding: 0 16px 14px; font-size: 13px; line-height: 1.9; color: var(--fpc-ink-2); }
.fpc-faq-a b { color: var(--fpc-teal); }

/* ===================== 留言板 / Toast ===================== */
.fpc-comments { margin-bottom: 20px; }

.fpc-toast {
    position: fixed;
    left: 50%;
    bottom: 32px;
    transform: translateX(-50%) translateY(16px);
    background: rgba(23, 58, 66, .95);
    color: #fff;
    font-size: 14px;
    padding: 10px 20px;
    border-radius: 10px;
    opacity: 0;
    pointer-events: none;
    transition: all .3s ease;
    z-index: 9999;
    max-width: 86vw;
}
.fpc-toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===================== 响应式 ===================== */
@media (max-width: 1080px) {
    .fpc-grid--5 { grid-template-columns: repeat(3, 1fr); }
    .fpc-grid--4 { grid-template-columns: repeat(2, 1fr); }
    .fpc-overview { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 960px) {
    .fpc-page { padding: 20px 16px 24px; }
    .fpc-page h1 { font-size: 24px; }
}
@media (max-width: 620px) {
    .fpc-grid--5, .fpc-grid--4 { grid-template-columns: 1fr 1fr; }
    .fpc-overview { grid-template-columns: 1fr; }
}

/* ===================== 打印样式：A4 对比单 ===================== */
.fpc-sheet { display: none; }

@media print {
    body > *:not(.detail-wrap) { display: none !important; }
    .detail-wrap .container > *:not(.fpc-sheet) { display: none !important; }
    .fpc-sheet {
        display: block !important;
        color: #000;
        font-size: 12px;
        line-height: 1.8;
    }
    .fpc-sheet h1 { font-size: 20px; color: #000; margin: 0 0 4px; }
    .fpc-sheet .fpc-sheet-meta { font-size: 11px; color: #444; margin-bottom: 14px; }
    .fpc-sheet table { width: 100%; border-collapse: collapse; margin-bottom: 14px; }
    .fpc-sheet th, .fpc-sheet td { border: 1px solid #999; padding: 5px 8px; text-align: left; }
    .fpc-sheet th { background: #eee; }
    .fpc-sheet .fpc-sheet-note { margin-top: 18px; color: #333; font-size: 11px; }
    .fpc-toast, .fpc-comments, .fpc-errbar { display: none !important; }
}