/* ============================================================
 * fin.css —— 财务计算器 Pro 系列设计系统（「轻奢账本」风格）
 * 与 neo.css 完全独立：作用域 .fin
 * 亮色 / 黑夜双主题：默认亮色；<html data-theme="dark"> 自动切黑夜
 * 栅格统一 minmax(0,…) 防宽表撑破；数字等宽 tabular-nums
 * ============================================================ */

:root {
    --fin-radius: 18px;
    --fin-radius-sm: 12px;
    --fin-shadow: 0 18px 50px -24px rgba(6, 78, 59, .28);
    --fin-shadow-soft: 0 8px 24px -14px rgba(6, 78, 59, .22);
    --fin-font: "PingFang SC", "Microsoft YaHei", "Segoe UI", system-ui, -apple-system, sans-serif;
    --fin-num: "SF Pro Display", "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

/* ---------- 亮色（默认，翡翠金） ---------- */
.fin {
    --fin-bg: #f4f7f4;
    --fin-ink: #0f2e22;
    --fin-ink-soft: #48604f;
    --fin-faint: #82968a;
    --fin-card: #ffffff;
    --fin-card-2: #f0f6f1;
    --fin-line: #e3ece5;
    --fin-line-strong: #cfe0d4;
    --fin-accent: #0e9f6e;
    --fin-accent-2: #059669;
    --fin-gold: #c9962f;
    --fin-gold-soft: #f6efdd;
    --fin-accent-soft: #e4f5ec;
    --fin-accent-ink: #066b4a;
    --fin-grad: linear-gradient(135deg, #0e9f6e 0%, #0ea371 45%, #14b88a 100%);
    --fin-hero-grad: linear-gradient(135deg, #0c8f63 0%, #0e9f6e 48%, #16a34a 100%);
    --fin-danger: #dc2626;
    --fin-danger-soft: #fdecec;
    --fin-warn: #d97706;
    --fin-warn-soft: #fdf3e3;
    --fin-input-bg: #f7faf8;
    --fin-track: #e7efe9;
    color-scheme: light;
}

/* ---------- 黑夜（墨翠） ---------- */
:root[data-theme="dark"] .fin {
    --fin-bg: #0a1512;
    --fin-ink: #e6f2ec;
    --fin-ink-soft: #a7bdb1;
    --fin-faint: #6f8579;
    --fin-card: #11201b;
    --fin-card-2: #0d1a16;
    --fin-line: #20332c;
    --fin-line-strong: #2d463c;
    --fin-accent: #2fe6a8;
    --fin-accent-2: #34d399;
    --fin-gold: #e4bb63;
    --fin-gold-soft: #2a2415;
    --fin-accent-soft: #12302740;
    --fin-accent-ink: #8ff0cd;
    --fin-grad: linear-gradient(135deg, #1ec88e 0%, #2fe6a8 55%, #34d399 100%);
    --fin-hero-grad: linear-gradient(135deg, #0c8f63 0%, #12a06f 50%, #0ea371 100%);
    --fin-danger: #f87171;
    --fin-danger-soft: #3a1c1c;
    --fin-warn: #fbbf24;
    --fin-warn-soft: #33280f;
    --fin-input-bg: #0c1915;
    --fin-track: #1b2c25;
    --fin-shadow: 0 20px 55px -28px rgba(0, 0, 0, .8);
    --fin-shadow-soft: 0 8px 24px -16px rgba(0, 0, 0, .7);
    color-scheme: dark;
}

/* ---------- 基础 ---------- */
.fin {
    font-family: var(--fin-font);
    color: var(--fin-ink);
    line-height: 1.6;
}
.fin *, .fin *::before, .fin *::after { box-sizing: border-box; }
.fin b, .fin strong { font-weight: 700; color: var(--fin-ink); }
.fin ::selection { background: color-mix(in srgb, var(--fin-accent) 28%, transparent); }

.fin-wrap { max-width: 1180px; margin: 0 auto; padding: 4px 0 10px; }

/* 面包屑 */
.fin-crumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--fin-faint); margin-bottom: 18px; }
.fin-crumb a { color: var(--fin-ink-soft); text-decoration: none; transition: color .15s; }
.fin-crumb a:hover { color: var(--fin-accent); }
.fin-crumb .sep { opacity: .6; }

/* ---------- 顶部 Hero ---------- */
.fin-hero {
    position: relative;
    overflow: hidden;
    border-radius: var(--fin-radius);
    padding: 30px 32px;
    color: #f3fff9;
    background: var(--fin-hero-grad);
    box-shadow: var(--fin-shadow);
    margin-bottom: 22px;
}
.fin-hero::after {
    content: ""; position: absolute; right: -70px; top: -90px;
    width: 280px; height: 280px; border-radius: 50%;
    background: radial-gradient(circle, rgba(255,255,255,.18), rgba(255,255,255,0) 70%);
    pointer-events: none;
}
.fin-hero-head { display: flex; gap: 18px; align-items: flex-start; position: relative; z-index: 1; }
.fin-hero-icon {
    flex: 0 0 auto; width: 58px; height: 58px; border-radius: 16px;
    display: grid; place-items: center; font-size: 30px;
    background: rgba(255,255,255,.16);
    border: 1px solid rgba(255,255,255,.25);
    backdrop-filter: blur(4px);
}
.fin-hero h1 { margin: 0 0 8px; font-size: 27px; font-weight: 800; letter-spacing: .3px; color: #fff; }
.fin-hero p { margin: 0; font-size: 14.5px; line-height: 1.85; color: rgba(244, 255, 249, .92); max-width: 880px; }
.fin-hero p b { color: #fff; }
.fin-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; position: relative; z-index: 1; }
.fin-tag {
    font-size: 12.5px; padding: 5px 12px; border-radius: 99px;
    background: rgba(255,255,255,.14); border: 1px solid rgba(255,255,255,.22);
    color: #eafff5; font-weight: 600;
}

/* 主题切换（页面内，同步全局 theme） */
.fin-theme {
    position: absolute; top: 18px; right: 20px; z-index: 2;
    display: inline-flex; align-items: center; gap: 6px;
    font-size: 12.5px; font-weight: 600; cursor: pointer;
    padding: 7px 13px; border-radius: 99px;
    color: #eafff5; background: rgba(0,0,0,.16);
    border: 1px solid rgba(255,255,255,.28);
    transition: background .15s;
}
.fin-theme:hover { background: rgba(0,0,0,.3); }

/* ---------- 卡片 ---------- */
.fin-card {
    background: var(--fin-card);
    border: 1px solid var(--fin-line);
    border-radius: var(--fin-radius);
    padding: 24px 26px;
    box-shadow: var(--fin-shadow-soft);
    margin-bottom: 20px;
}
.fin-card-title {
    display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
    margin: 0 0 18px; font-size: 17px; font-weight: 800; color: var(--fin-ink);
}
.fin-card-title .fi { font-size: 21px; line-height: 1; }
.fin-card-title .fin-sub {
    font-size: 12.5px; font-weight: 500; color: var(--fin-faint);
    margin-left: 4px;
}
.fin-card-title .fin-more { margin-left: auto; font-size: 12.5px; color: var(--fin-faint); font-weight: 500; }

/* 上下单列布局：轨道允许收缩，宽表不会撑破 */
.fin-stack { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; }
.fin-stack > .fin-card { min-width: 0; }

/* ---------- 表单 ---------- */
.fin-grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.fin-grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.fin-grid4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; }
.fin-field { margin-bottom: 16px; min-width: 0; }
.fin-grid2 > .fin-field, .fin-grid3 > .fin-field, .fin-grid4 > .fin-field { margin-bottom: 0; }
.fin-label { display: block; font-size: 13.5px; font-weight: 600; color: var(--fin-ink-soft); margin-bottom: 7px; }
.fin-label .fin-hint { font-weight: 400; color: var(--fin-faint); font-size: 12px; margin-left: 4px; }
.fin-input, .fin-select, .fin-textarea {
    width: 100%; min-width: 0;
    font-family: var(--fin-num);
    font-size: 15px; font-weight: 600; color: var(--fin-ink);
    background: var(--fin-input-bg);
    border: 1.5px solid var(--fin-line-strong);
    border-radius: var(--fin-radius-sm);
    padding: 11px 13px;
    outline: none;
    transition: border-color .15s, box-shadow .15s, background .15s;
    font-variant-numeric: tabular-nums;
}
.fin-textarea { font-family: var(--fin-font); font-weight: 500; resize: vertical; line-height: 1.7; }
.fin-input:focus, .fin-select:focus, .fin-textarea:focus {
    border-color: var(--fin-accent);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--fin-accent) 18%, transparent);
    background: var(--fin-card);
}
.fin-input::placeholder, .fin-textarea::placeholder { color: var(--fin-faint); font-weight: 400; }
.fin-input.is-invalid { border-color: var(--fin-danger); box-shadow: 0 0 0 3px color-mix(in srgb, var(--fin-danger) 16%, transparent); }

/* 带前缀/后缀的输入（¥ % 等） */
.fin-addon { position: relative; display: flex; align-items: stretch; }
.fin-addon > .fin-input { padding-left: 38px; }
.fin-addon .pre, .fin-addon .suf {
    display: flex; align-items: center; justify-content: center;
    padding: 0 12px; font-size: 14px; font-weight: 700; color: var(--fin-faint);
    pointer-events: none;
}
.fin-addon .pre { position: absolute; left: 0; top: 0; bottom: 0; }
.fin-addon.with-suf > .fin-input { padding-left: 38px; padding-right: 40px; }
.fin-addon .suf { position: absolute; right: 0; top: 0; bottom: 0; }

/* 开关 / 单选分段 */
.fin-seg { display: inline-flex; flex-wrap: wrap; gap: 4px; background: var(--fin-track); padding: 4px; border-radius: 12px; }
.fin-seg button {
    border: 0; cursor: pointer; font-family: inherit; font-size: 13.5px; font-weight: 600;
    padding: 8px 16px; border-radius: 9px; color: var(--fin-ink-soft); background: transparent;
    transition: all .15s; white-space: nowrap;
}
.fin-seg button.active { background: var(--fin-card); color: var(--fin-accent-ink); box-shadow: var(--fin-shadow-soft); }
:root[data-theme="dark"] .fin-seg button.active { background: #1c3029; }

/* 复选行 */
.fin-check { display: inline-flex; align-items: center; gap: 8px; font-size: 13.5px; color: var(--fin-ink-soft); cursor: pointer; user-select: none; }
.fin-check input { width: 16px; height: 16px; accent-color: var(--fin-accent); cursor: pointer; }

/* ---------- 按钮 ---------- */
.fin-btns { display: flex; gap: 12px; flex-wrap: wrap; width: 100%; margin-top: 6px; }
.fin-btn {
    flex: 1 1 0; min-width: 150px;
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    font-family: inherit; font-size: 15px; font-weight: 700; cursor: pointer;
    padding: 13px 20px; border-radius: var(--fin-radius-sm);
    border: 1.5px solid transparent;
    background: var(--fin-grad); color: #fff;
    box-shadow: 0 10px 22px -12px color-mix(in srgb, var(--fin-accent) 70%, transparent);
    transition: transform .12s, box-shadow .15s, filter .15s;
}
.fin-btn:hover { transform: translateY(-1px); filter: brightness(1.04); }
.fin-btn:active { transform: translateY(0); }
.fin-btn--ghost {
    background: transparent; color: var(--fin-accent-ink);
    border-color: var(--fin-line-strong);
    box-shadow: none;
}
:root[data-theme="dark"] .fin-btn--ghost { color: var(--fin-accent); }
.fin-btn--ghost:hover { background: var(--fin-accent-soft); filter: none; }
.fin-btn--gold { background: linear-gradient(135deg, #d3a639, #e0bd63); color: #3a2c08; box-shadow: 0 10px 22px -14px rgba(201,150,47,.8); }
.fin-btn--sm { flex: 0 0 auto; min-width: 0; font-size: 13.5px; padding: 9px 15px; }
.fin-btn:disabled { opacity: .55; cursor: not-allowed; transform: none; }

/* ---------- 结果：大数字账本 ---------- */
.fin-ledger {
    border-radius: var(--fin-radius);
    padding: 26px 28px;
    background:
        radial-gradient(120% 160% at 0% 0%, color-mix(in srgb, var(--fin-accent) 14%, transparent), transparent 60%),
        var(--fin-card-2);
    border: 1px solid var(--fin-line);
    margin-bottom: 20px;
}
.fin-ledger-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.fin-ledger-head .lt { font-size: 14px; color: var(--fin-ink-soft); font-weight: 600; }
.fin-ledger-head .lh { margin-left: auto; font-size: 12.5px; color: var(--fin-faint); }
.fin-hero-num {
    font-family: var(--fin-num); font-weight: 800; letter-spacing: -.5px;
    font-size: 42px; line-height: 1.1; color: var(--fin-accent);
    font-variant-numeric: tabular-nums;
    word-break: break-all;
}
.fin-hero-num small { font-size: 17px; font-weight: 700; color: var(--fin-faint); margin-left: 4px; }
.fin-hero-sub { font-size: 13.5px; color: var(--fin-ink-soft); margin-top: 8px; }
.fin-hero-sub b { color: var(--fin-gold); }

.fin-kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 14px; margin-top: 20px; }
.fin-kpi {
    background: var(--fin-card); border: 1px solid var(--fin-line);
    border-radius: var(--fin-radius-sm); padding: 15px 16px; min-width: 0;
}
.fin-kpi .k-label { font-size: 12.5px; color: var(--fin-faint); font-weight: 600; margin-bottom: 6px; display: flex; align-items: center; gap: 5px; }
.fin-kpi .k-val { font-family: var(--fin-num); font-size: 21px; font-weight: 800; color: var(--fin-ink); font-variant-numeric: tabular-nums; word-break: break-word; }
.fin-kpi .k-val.up { color: var(--fin-accent); }
.fin-kpi .k-val.down { color: var(--fin-danger); }
.fin-kpi .k-val.gold { color: var(--fin-gold); }
.fin-kpi .k-note { font-size: 12px; color: var(--fin-faint); margin-top: 3px; }

/* 明细行 */
.fin-rows { border-top: 1px solid var(--fin-line); margin-top: 6px; }
.fin-row {
    display: flex; align-items: center; justify-content: space-between; gap: 14px;
    padding: 12px 2px; border-bottom: 1px solid var(--fin-line); font-size: 14.5px;
}
.fin-row .r-label { color: var(--fin-ink-soft); display: flex; align-items: center; gap: 7px; }
.fin-row .r-val { font-family: var(--fin-num); font-weight: 700; font-variant-numeric: tabular-nums; text-align: right; }
.fin-row.total { border-bottom: 0; border-top: 2px solid var(--fin-line-strong); margin-top: 2px; padding-top: 14px; font-size: 16px; }
.fin-row.total .r-label, .fin-row.total .r-val { color: var(--fin-ink); font-weight: 800; }
.fin-row .r-val.pos { color: var(--fin-accent); }
.fin-row .r-val.neg { color: var(--fin-danger); }

/* 徽标 / 提示条 */
.fin-badge { display: inline-flex; align-items: center; gap: 5px; font-size: 12px; font-weight: 700; padding: 3px 10px; border-radius: 99px; }
.fin-badge.ok { background: var(--fin-accent-soft); color: var(--fin-accent-ink); }
.fin-badge.warn { background: var(--fin-warn-soft); color: var(--fin-warn); }
.fin-badge.bad { background: var(--fin-danger-soft); color: var(--fin-danger); }
.fin-note {
    display: flex; gap: 10px; align-items: flex-start;
    font-size: 13px; line-height: 1.8; color: var(--fin-ink-soft);
    background: var(--fin-card-2); border: 1px solid var(--fin-line);
    border-left: 3px solid var(--fin-accent);
    border-radius: 10px; padding: 12px 15px; margin-top: 14px;
}
.fin-note.gold { border-left-color: var(--fin-gold); }
.fin-note.warn { border-left-color: var(--fin-warn); }
.fin-note .ni { flex: 0 0 auto; }
.fin-faint { color: var(--fin-faint); }

/* ---------- 数据表（宽表内部横向滚动） ---------- */
.fin-table-wrap { border: 1px solid var(--fin-line); border-radius: var(--fin-radius-sm); overflow-x: auto; -webkit-overflow-scrolling: touch; }
.fin-table { width: 100%; border-collapse: collapse; font-size: 13.5px; min-width: 480px; }
.fin-table th, .fin-table td { padding: 10px 14px; text-align: right; border-bottom: 1px solid var(--fin-line); white-space: nowrap; font-variant-numeric: tabular-nums; }
.fin-table th:first-child, .fin-table td:first-child { text-align: left; }
.fin-table thead th { background: var(--fin-card-2); color: var(--fin-ink-soft); font-weight: 700; font-size: 12.5px; position: sticky; top: 0; }
.fin-table tbody tr:last-child td { border-bottom: 0; }
.fin-table tbody tr:hover { background: var(--fin-accent-soft); }
.fin-table tfoot td { font-weight: 800; background: var(--fin-card-2); }

/* 进度条 */
.fin-bar { height: 9px; border-radius: 99px; background: var(--fin-track); overflow: hidden; }
.fin-bar > i { display: block; height: 100%; border-radius: 99px; background: var(--fin-grad); transition: width .3s; }
.fin-bar.gold > i { background: linear-gradient(90deg, #d3a639, #e0bd63); }
.fin-bar.danger > i { background: linear-gradient(90deg, #ef4444, #f87171); }

/* ---------- AI ---------- */
.fin-ai { border-radius: var(--fin-radius-sm); background: var(--fin-card-2); border: 1px solid var(--fin-line); padding: 16px 18px; margin-top: 14px; }
.fin-ai.empty { color: var(--fin-faint); font-size: 13.5px; line-height: 1.9; }
.fin-ai-body { font-size: 14px; line-height: 2; color: var(--fin-ink-soft); white-space: pre-wrap; word-break: break-word; }
.fin-ai-body b, .fin-ai-body strong { color: var(--fin-ink); }
.fin-ai-status { font-size: 12.5px; color: var(--fin-faint); margin-top: 8px; }
.fin-ai-dots::after { content: "…"; animation: fin-dots 1.2s steps(4) infinite; }
@keyframes fin-dots { 0% { content: ""; } 25% { content: "·"; } 50% { content: "··"; } 75% { content: "···"; } }

/* ---------- Tabs（简介/方法/FAQ） ---------- */
.fin-tabs { display: flex; gap: 6px; flex-wrap: wrap; border-bottom: 2px solid var(--fin-line); margin: 8px 0 0; }
.fin-tab {
    border: 0; background: none; cursor: pointer; font-family: inherit;
    font-size: 14.5px; font-weight: 600; color: var(--fin-faint);
    padding: 11px 18px; border-bottom: 2px solid transparent; margin-bottom: -2px;
    transition: color .15s;
}
.fin-tab:hover { color: var(--fin-ink-soft); }
.fin-tab.active { color: var(--fin-accent); border-bottom-color: var(--fin-accent); }
.fin-panel { display: none; padding: 20px 4px; }
.fin-panel.active { display: block; animation: fin-fade .25s; }
@keyframes fin-fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
.fin-panel h2 { font-size: 17px; margin: 18px 0 10px; color: var(--fin-ink); }
.fin-panel h2:first-child { margin-top: 4px; }
.fin-panel p, .fin-panel li { font-size: 14px; line-height: 2; color: var(--fin-ink-soft); }
.fin-panel ul, .fin-panel ol { padding-left: 22px; margin: 8px 0; }
.fin-panel b { color: var(--fin-ink); }
.fin-faq details {
    border: 1px solid var(--fin-line); border-radius: var(--fin-radius-sm);
    padding: 0 16px; margin-bottom: 10px; background: var(--fin-card);
}
.fin-faq summary { cursor: pointer; font-weight: 700; font-size: 14.5px; padding: 14px 0; color: var(--fin-ink); list-style: none; }
.fin-faq summary::-webkit-details-marker { display: none; }
.fin-faq summary::after { content: "+"; float: right; color: var(--fin-faint); font-size: 18px; font-weight: 400; }
.fin-faq details[open] summary::after { content: "−"; }
.fin-faq .a { padding: 0 0 14px; font-size: 13.5px; line-height: 2; color: var(--fin-ink-soft); }

/* 时间线（更新记录） */
.fin-timeline li { display: grid; grid-template-columns: 90px 110px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px dashed var(--fin-line); font-size: 13.5px; }
.fin-timeline .ver { font-weight: 800; color: var(--fin-accent); }
.fin-timeline .date { color: var(--fin-faint); font-variant-numeric: tabular-nums; }
.fin-timeline .txt { color: var(--fin-ink-soft); line-height: 1.8; }

/* 相关工具 */
.fin-rel-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 12px; margin-top: 14px; }
.fin-rel {
    display: flex; align-items: center; gap: 12px; text-decoration: none;
    border: 1px solid var(--fin-line); border-radius: var(--fin-radius-sm);
    padding: 13px 15px; background: var(--fin-card); transition: border-color .15s, transform .12s;
}
.fin-rel:hover { border-color: var(--fin-accent); transform: translateY(-2px); }
.fin-rel .ri { font-size: 24px; }
.fin-rel b { display: block; font-size: 14px; color: var(--fin-ink); }
.fin-rel small { font-size: 12px; color: var(--fin-faint); }

/* toast */
.fin-toast {
    position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 16px);
    background: var(--fin-ink); color: var(--fin-bg);
    padding: 11px 22px; border-radius: 99px; font-size: 14px; font-weight: 600;
    box-shadow: var(--fin-shadow); opacity: 0; pointer-events: none;
    transition: opacity .2s, transform .2s; z-index: 9999;
}
.fin-toast.show { opacity: 1; transform: translate(-50%, 0); }

/* 状态提示 */
.fin-status { font-size: 13px; margin-top: 10px; min-height: 18px; color: var(--fin-faint); }
.fin-status.err { color: var(--fin-danger); }
.fin-status.ok { color: var(--fin-accent); }
.fin-hide { display: none !important; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
    .fin-grid3, .fin-grid4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .fin-hero { padding: 24px 22px; }
    .fin-hero h1 { font-size: 23px; }
    .fin-card { padding: 20px 18px; }
}
@media (max-width: 600px) {
    .fin-grid2, .fin-grid3, .fin-grid4 { grid-template-columns: minmax(0, 1fr); }
    .fin-hero-num { font-size: 33px; }
    .fin-timeline li { grid-template-columns: 1fr; gap: 2px; }
    .fin-theme { position: static; margin-bottom: 12px; }
}