/* ==========================================================================
   文档字数换算页数计算器 /tool/doc-page-count-calc
   视觉主题：稿纸排版台 —— 暖纸米白 + 靛青格线 + 蜜橙强调
   深浅双主题；深色模式跟随导航栏 #themeToggle，页面内不另设切换开关
   ========================================================================== */

.dpc-page {
    /* ---- 浅色（默认） ---- */
    --dpc-bg: #f4efe3;
    --dpc-bg-2: #ece5d1;
    --dpc-card: #fffdf6;
    --dpc-card-2: #f8f4e8;
    --dpc-ink: #2e2a1f;
    --dpc-ink-2: #665d49;
    --dpc-ink-3: #978d75;
    --dpc-line: #dcd2ba;
    --dpc-line-2: #e9e1cc;
    --dpc-indigo: #35507e;
    --dpc-indigo-2: #4a6ba1;
    --dpc-indigo-soft: #e4eaf5;
    --dpc-amber: #b06f1e;
    --dpc-amber-soft: #f6ead4;
    --dpc-green: #4c7a4f;
    --dpc-green-soft: #e6f0e4;
    --dpc-red: #b23c2e;
    --dpc-red-soft: #f9e8e4;
    --dpc-shadow: 0 16px 36px rgba(80, 66, 35, .14);
    --dpc-shadow-sm: 0 5px 16px rgba(80, 66, 35, .09);
    --dpc-radius: 16px;
    --dpc-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

:root[data-theme="dark"] .dpc-page {
    /* ---- 深色：墨夜稿纸 ---- */
    --dpc-bg: #191610;
    --dpc-bg-2: #201c13;
    --dpc-card: #242017;
    --dpc-card-2: #2b2619;
    --dpc-ink: #ece4cf;
    --dpc-ink-2: #c0b598;
    --dpc-ink-3: #8d8469;
    --dpc-line: #3c3524;
    --dpc-line-2: #302a1b;
    --dpc-indigo: #8aa6d8;
    --dpc-indigo-2: #a5bce6;
    --dpc-indigo-soft: #1e2940;
    --dpc-amber: #d99a4e;
    --dpc-amber-soft: #2f2210;
    --dpc-green: #8ab389;
    --dpc-green-soft: #1a2a1c;
    --dpc-red: #d98a7c;
    --dpc-red-soft: #2e1a15;
    --dpc-shadow: 0 16px 40px rgba(0, 0, 0, .5);
    --dpc-shadow-sm: 0 5px 16px rgba(0, 0, 0, .4);
}

.dpc-page {
    color: var(--dpc-ink);
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.78;
    font-variant-numeric: tabular-nums;
    padding: 26px 26px 30px;
    margin-top: 22px;
    background:
        repeating-linear-gradient(180deg, transparent 0 27px, rgba(53, 80, 126, .05) 27px 28px),
        linear-gradient(180deg, var(--dpc-bg-2), var(--dpc-bg));
    border: 1px solid var(--dpc-line);
    border-radius: var(--dpc-radius);
    box-shadow: var(--dpc-shadow);
}

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

.dpc-page h1,
.dpc-page h2,
.dpc-page h3 { margin: 0; line-height: 1.35; letter-spacing: .3px; }
.dpc-page h1 { font-size: 31px; font-weight: 800; color: var(--dpc-indigo); }
.dpc-page h2 { font-size: 20px; font-weight: 800; color: var(--dpc-ink); }
.dpc-page h3 { font-size: 15px; font-weight: 700; color: var(--dpc-ink); }

/* ===================== 首屏 ===================== */
.dpc-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 372px;
    gap: 26px;
    align-items: start;
    margin-bottom: 18px;
}

.dpc-kicker {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--dpc-indigo);
    background: var(--dpc-indigo-soft);
    border: 1px solid var(--dpc-line);
    border-radius: 999px;
    padding: 3px 13px;
    margin-bottom: 12px;
}

.dpc-lead {
    margin: 10px 0 14px;
    font-size: 15px;
    color: var(--dpc-ink-2);
    max-width: 56ch;
    line-height: 1.9;
}
.dpc-lead b { color: var(--dpc-indigo); font-weight: 700; }

.dpc-tags { list-style: none; margin: 0 0 16px; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.dpc-tags li {
    font-size: 12px;
    color: var(--dpc-ink-2);
    background: var(--dpc-card);
    border: 1px solid var(--dpc-line);
    border-radius: 999px;
    padding: 2px 11px;
}

.dpc-hero-cta { display: flex; gap: 10px; }

/* ---- 右侧速算卡 ---- */
.dpc-meter {
    background: var(--dpc-card);
    border: 1px solid var(--dpc-line);
    border-radius: var(--dpc-radius);
    box-shadow: var(--dpc-shadow-sm);
    padding: 15px 16px 13px;
    position: sticky;
    top: 76px;
}

.dpc-meter-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 10px;
}
.dpc-meter-head b { font-size: 15px; }
.dpc-meter-head span { font-size: 11px; color: var(--dpc-ink-3); }

.dpc-stage { text-align: center; margin-bottom: 10px; }
.dpc-a4 {
    width: 132px;
    aspect-ratio: 210 / 297;
    margin: 0 auto;
    background: var(--dpc-card-2);
    border: 1.5px solid var(--dpc-line);
    border-radius: 4px;
    padding: 9% 10%;
    display: flex;
    flex-direction: column;
    gap: 2.5%;
    overflow: hidden;
}
.dpc-a4-grid { display: flex; flex-direction: column; gap: 0; height: 100%; }
.dpc-a4-line {
    flex: 1;
    min-height: 0;
    border-radius: 2px;
    background: var(--dpc-line-2);
    margin-bottom: 22%;
}
.dpc-a4-line.is-fill { background: var(--dpc-indigo-2); opacity: .85; }
.dpc-a4-line.is-partial { background: linear-gradient(90deg, var(--dpc-indigo-2) 0 var(--fill, 50%), var(--dpc-line-2) var(--fill, 50%) 100%); }
.dpc-stage-cap { font-size: 11px; color: var(--dpc-ink-3); margin-top: 7px; }

.dpc-nums { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 10px; }
.dpc-num {
    background: var(--dpc-card-2);
    border: 1px solid var(--dpc-line-2);
    border-radius: 10px;
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
}
.dpc-num.is-main { background: var(--dpc-indigo-soft); border-color: transparent; }
.dpc-num-label { font-size: 11px; color: var(--dpc-ink-3); }
.dpc-num-val { font-size: 26px; font-weight: 800; color: var(--dpc-indigo); line-height: 1.25; font-family: var(--dpc-mono); }
.dpc-num:not(.is-main) .dpc-num-val { color: var(--dpc-ink); font-size: 22px; }
.dpc-num-unit { font-size: 11px; color: var(--dpc-ink-3); }

.dpc-bar {
    height: 10px;
    border-radius: 999px;
    background: var(--dpc-card-2);
    border: 1px solid var(--dpc-line-2);
    overflow: hidden;
    display: flex;
}
.dpc-bar-seg { height: 100%; transition: width .25s ease; }
.dpc-bar-seg.is-body { background: var(--dpc-indigo-2); }
.dpc-bar-seg.is-ref { background: var(--dpc-amber); }
.dpc-bar-seg.is-extra { background: var(--dpc-green); }

.dpc-legend { list-style: none; display: flex; gap: 12px; margin: 8px 0 10px; padding: 0; font-size: 11px; color: var(--dpc-ink-2); }
.dpc-legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 4px; vertical-align: -1px; }
.dpc-legend .is-body { background: var(--dpc-indigo-2); }
.dpc-legend .is-ref { background: var(--dpc-amber); }
.dpc-legend .is-extra { background: var(--dpc-green); }

.dpc-rows { display: flex; flex-direction: column; gap: 5px; }
.dpc-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-size: 13px;
    background: var(--dpc-card-2);
    border: 1px solid var(--dpc-line-2);
    border-radius: 8px;
    padding: 6px 11px;
}
.dpc-row .k { color: var(--dpc-ink-2); }
.dpc-row .v { font-family: var(--dpc-mono); font-weight: 700; color: var(--dpc-ink); }
.dpc-row .v.is-strong { color: var(--dpc-indigo); font-size: 15px; }

/* ===================== 预设 / 提示条 ===================== */
.dpc-presets {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 14px;
}
.dpc-presets-label { font-size: 12px; font-weight: 700; color: var(--dpc-ink-3); letter-spacing: 1px; }
.dpc-presets button {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--dpc-indigo);
    background: var(--dpc-card);
    border: 1px solid var(--dpc-line);
    border-radius: 999px;
    padding: 5px 14px;
    cursor: pointer;
    transition: all .15s ease;
}
.dpc-presets button:hover { background: var(--dpc-indigo-soft); border-color: var(--dpc-indigo-2); transform: translateY(-1px); }

.dpc-errbar {
    background: var(--dpc-red-soft);
    color: var(--dpc-red);
    border: 1px solid var(--dpc-red);
    border-radius: 10px;
    padding: 9px 14px;
    font-size: 13.5px;
    margin-bottom: 14px;
}

/* ===================== 面板 ===================== */
.dpc-panel {
    background: var(--dpc-card);
    border: 1px solid var(--dpc-line);
    border-radius: var(--dpc-radius);
    box-shadow: var(--dpc-shadow-sm);
    padding: 20px 22px 22px;
    margin-bottom: 16px;
}

.dpc-panel-head { margin-bottom: 14px; }
.dpc-pk {
    display: inline-block;
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 2px;
    color: var(--dpc-card);
    background: var(--dpc-indigo);
    border-radius: 6px;
    padding: 2px 9px;
    margin-bottom: 8px;
}
.dpc-panel-head p { margin: 6px 0 0; font-size: 13.5px; color: var(--dpc-ink-2); }

.dpc-mode { display: flex; gap: 0; margin-bottom: 14px; border: 1px solid var(--dpc-line); border-radius: 10px; overflow: hidden; width: fit-content; }
.dpc-mode-btn {
    font-size: 13.5px;
    font-weight: 700;
    color: var(--dpc-ink-2);
    background: var(--dpc-card-2);
    border: none;
    padding: 8px 18px;
    cursor: pointer;
}
.dpc-mode-btn.is-on { color: var(--dpc-card); background: var(--dpc-indigo); }

.dpc-textarea {
    width: 100%;
    min-height: 150px;
    resize: vertical;
    font-size: 14px;
    line-height: 1.8;
    color: var(--dpc-ink);
    background: var(--dpc-card-2);
    border: 1px solid var(--dpc-line);
    border-radius: 10px;
    padding: 12px 14px;
    font-family: inherit;
}
.dpc-textarea:focus { outline: 2px solid var(--dpc-indigo-2); outline-offset: 0; border-color: var(--dpc-indigo-2); }
.dpc-text-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    font-size: 12.5px;
    color: var(--dpc-ink-2);
    margin-top: 8px;
}
.dpc-text-meta span { font-family: var(--dpc-mono); font-weight: 700; }
.dpc-check { display: inline-flex; align-items: center; gap: 5px; cursor: pointer; font-weight: 400; }
.dpc-check input { accent-color: var(--dpc-indigo); }

.dpc-cols {
    display: grid;
    grid-template-columns: 1.15fr 1fr;
    gap: 22px;
    margin-top: 16px;
}
.dpc-sub {
    display: flex;
    align-items: center;
    gap: 7px;
    margin: 0 0 10px;
}
.dpc-sub i {
    font-style: normal;
    font-size: 11px;
    font-weight: 800;
    width: 19px;
    height: 19px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    color: var(--dpc-card);
    background: var(--dpc-amber);
    flex: none;
}
.dpc-sub-note { font-size: 11px; font-weight: 400; color: var(--dpc-ink-3); }
.dpc-col .dpc-sub + .dpc-sub { margin-top: 16px; }

.dpc-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 4px; }
.dpc-grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.dpc-grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.dpc-grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }

.dpc-field { display: flex; flex-direction: column; gap: 4px; }
.dpc-field--btn { justify-content: flex-end; }
.dpc-label { font-size: 12.5px; color: var(--dpc-ink-2); }
.dpc-unit { font-size: 11px; color: var(--dpc-ink-3); }
.dpc-hint { font-size: 11px; color: var(--dpc-indigo-2); }
.dpc-input {
    width: 100%;
    font-size: 14px;
    color: var(--dpc-ink);
    background: var(--dpc-card-2);
    border: 1px solid var(--dpc-line);
    border-radius: 8px;
    padding: 7px 10px;
    font-family: inherit;
}
.dpc-input.dpc-mono { font-family: var(--dpc-mono); }
.dpc-input:focus { outline: 2px solid var(--dpc-indigo-2); border-color: var(--dpc-indigo-2); }
.dpc-note { font-size: 12px; color: var(--dpc-ink-3); margin: 8px 0 0; line-height: 1.7; }

/* ---- 反推 ---- */
.dpc-reverse {
    display: grid;
    grid-template-columns: 240px 1fr;
    gap: 18px;
    align-items: start;
}
.dpc-reverse-out { display: flex; flex-direction: column; gap: 6px; }
.dpc-reverse-out .dpc-row { font-size: 14px; padding: 9px 13px; }

/* ---- 方案对比 ---- */
.dpc-scheme-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.dpc-scheme-bar .dpc-input { width: 220px; }
.dpc-table-wrap { overflow-x: auto; border: 1px solid var(--dpc-line-2); border-radius: 10px; }
.dpc-table { width: 100%; border-collapse: collapse; font-size: 13px; min-width: 640px; }
.dpc-table th {
    text-align: left;
    font-size: 12px;
    color: var(--dpc-ink-2);
    background: var(--dpc-card-2);
    border-bottom: 1px solid var(--dpc-line);
    padding: 8px 12px;
    white-space: nowrap;
}
.dpc-table td { padding: 9px 12px; border-bottom: 1px solid var(--dpc-line-2); white-space: nowrap; }
.dpc-table td.dpc-mono, .dpc-table .dpc-mono { font-family: var(--dpc-mono); }
.dpc-table .is-best { color: var(--dpc-green); font-weight: 800; }
.dpc-op button {
    font-size: 12px;
    color: var(--dpc-red);
    background: none;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 2px 8px;
    cursor: pointer;
}
.dpc-op button:hover { background: var(--dpc-red-soft); border-color: var(--dpc-red); }
.dpc-empty { text-align: center; color: var(--dpc-ink-3); font-size: 13px; padding: 16px 0; }

/* ---- 按钮 / 动作 / CSV ---- */
.dpc-btn {
    font-size: 13.5px;
    font-weight: 700;
    border-radius: 9px;
    padding: 8px 16px;
    cursor: pointer;
    border: 1px solid var(--dpc-line);
    background: var(--dpc-card-2);
    color: var(--dpc-ink);
    transition: all .15s ease;
}
.dpc-btn:hover { border-color: var(--dpc-indigo-2); color: var(--dpc-indigo); transform: translateY(-1px); }
.dpc-btn--primary { background: var(--dpc-indigo); border-color: var(--dpc-indigo); color: var(--dpc-card); }
.dpc-btn--primary:hover { background: var(--dpc-indigo-2); color: var(--dpc-card); }
.dpc-btn--ghost { background: transparent; }

.dpc-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 14px; }
.dpc-pre {
    background: var(--dpc-card-2);
    border: 1px solid var(--dpc-line-2);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 12.5px;
    font-family: var(--dpc-mono);
    color: var(--dpc-ink-2);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 220px;
    overflow: auto;
    margin: 0;
    line-height: 1.7;
}

/* ---- FAQ ---- */
.dpc-faq { display: flex; flex-direction: column; gap: 8px; }
.dpc-faq-item {
    background: var(--dpc-card-2);
    border: 1px solid var(--dpc-line-2);
    border-radius: 10px;
    padding: 0 15px;
}
.dpc-faq-item[open] { border-color: var(--dpc-indigo-2); }
.dpc-faq-item summary {
    cursor: pointer;
    font-size: 14.5px;
    font-weight: 700;
    padding: 11px 0;
    list-style: none;
    position: relative;
    padding-right: 26px;
}
.dpc-faq-item summary::-webkit-details-marker { display: none; }
.dpc-faq-item summary::after {
    content: "+";
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--dpc-indigo);
    font-size: 17px;
    font-weight: 800;
}
.dpc-faq-item[open] summary::after { content: "−"; }
.dpc-faq-a { font-size: 13.5px; color: var(--dpc-ink-2); line-height: 1.9; padding: 0 0 13px; }
.dpc-faq-a b { color: var(--dpc-indigo); }

.dpc-comments { margin-top: 4px; }

/* ===================== A4 参数单（仅打印显示） ===================== */
.dpc-sheet { display: none; }

/* ===================== Toast ===================== */
.dpc-toast {
    position: fixed;
    left: 50%;
    bottom: 34px;
    transform: translateX(-50%) translateY(20px);
    background: var(--dpc-ink);
    color: var(--dpc-bg);
    font-size: 13.5px;
    font-weight: 600;
    border-radius: 999px;
    padding: 9px 22px;
    opacity: 0;
    pointer-events: none;
    transition: all .25s ease;
    z-index: 999;
}
.dpc-toast.is-show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ===================== 响应式 ===================== */
@media (max-width: 980px) {
    .dpc-hero { grid-template-columns: 1fr; }
    .dpc-meter { position: static; }
    .dpc-a4 { display: none; }
    .dpc-cols { grid-template-columns: 1fr; }
    .dpc-grid--3, .dpc-grid--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .dpc-reverse { grid-template-columns: 1fr; }
    .dpc-page { padding: 18px 16px 22px; }
    .dpc-page h1 { font-size: 25px; }
}

/* ===================== 打印 ===================== */
@media print {
    .dpc-page { display: none !important; }
    .dpc-sheet { display: block !important; color: #222; font-size: 12.5px; line-height: 1.8; }
    .dpc-sheet h2 { font-size: 19px; margin: 0 0 6px; }
    .dpc-sheet .dpc-sheet-sub { color: #666; font-size: 12px; margin-bottom: 14px; }
    .dpc-sheet table { width: 100%; border-collapse: collapse; margin: 10px 0; }
    .dpc-sheet th, .dpc-sheet td { border: 1px solid #bbb; padding: 6px 10px; text-align: left; font-size: 12px; }
    .dpc-sheet th { background: #f2f2f2; }
    .dpc-sheet .dpc-sheet-note { color: #666; font-size: 11.5px; margin-top: 10px; }
}